China Socks manufacturer

DW-66/4 type air compressor

Factory code: 854

Compressed media: air

Rows: 6, volume flow: 66m3 / s, the suction pressure: 0.095MPa, discharge pressure: 0.5MPa

The total weight of the unit: 31297Kg, motor power: 315Kwair compressor parts

6M40-225/314 nitrogen hydrogen compressor

Factory Code: 402

Compressed media: Nitrogen and Hydrogen

Cooling mode: water-cooled, the number of columns: 6, compressed series: 7

Suction pressure: 0.04MPa, the exhaust pressure: 31.4MPa

Weight: 98T, on the total weight of the Unit: 231.4T, motor power: 4000Kw

6M25-185/314 type nitrogen hydrogen gas compressor

Factory Code: 256

Compressed media: Nitrogen and Hydrogen

Cooling mode: water-cooled, the number of columns: 6 displacement: 185m3/min,

Suction pressure: 0.006MPa exhaust pressure: 31.4MPaG

The total weight of the unit: 149T, motor power: 2800Kw

MW-2.4/16-200 DC type natural gas compressor

Factory code: DC044

Compressed medium: natural gas

Cooling mode: water-cooled, the number of columns: 4 Displacement: 2200Nm3/min
compressor valves
Suction pressure: 1.6MPa, the exhaust pressure: 20MPaG

Total unit weight: 12.5T, motor power: 280Kw

M-86/156 type carbon dioxide compressor

Compressed media: CO2

Cooling mode: water-cooled, the number of columns: 4 Displacement: 2200Nm3/min

Inspiratory pressure: atmospheric pressure, discharge pressure: 15.6MPaG

The total weight of the unit: 74.28T, motor power: 1250kw

The choice of the balancing valve in the design calculation consists of two parts, first is the choice of the flow characteristics, followed by balancing valve caliber choice.
1, the choice of the flow characteristics in the heating system, balance valve, usually installed in the trunk of the branch point, the heat at the entrance points to the very source of heat, water catchment and the thermal station in the flow control (including control valve and electric valve). When the heat flux, we often need to rely on the balancing valve regulation to change the flow, with the changes in water temperature, the radiator heat output to meet the requirements of the heat load. The heat exchanger heat transfer characteristics of the ideal (including heat exchangers, radiators) response to the relative heat and balancing valve relatively open linear relationship, that is, to ensure that the adjustment process, balancing valves and heat exchangers magnification factor remains unchanged, the thermal characteristics of the heat exchanger (radiator) in a small flow of heat change; heat in a large flow changes. Is the amplification factor in a small flow; large flow amplification factor in order to maintain the total magnification factor constant, the flow characteristics of the balancing valve is a small flow amplification factor; large flow amplification factor.
(1) balancing valve resistance should be between 10-30% of the total resistance of the system, the balance valve should refer to the pressure diagram;stainless steel pipe fittings
(2) in the choice of balancing valve, balancing valve for the same caliber, it should be the preferred resistance larger;
(3) in the choice of balancing valve, in order to increase the percentage of the balance valve resistance accounted for the total system resistance, may be appropriate to select a smaller diameter tube diameter than the pipe balancing valve.
2, selection and calculation of the balancing valve diameter
Balancing valve flow coefficient Kv formula:
: W flow: t / h; Q flow unit: m; △ P differential pressure unit: Pa; water density of ρ: g / cm.clamp ferrule
Balancing valve in the heating system before and after the pressure drop 300KPa (proximal users), by balancing valve manufacturers provide different caliber flow coefficient Kv 3KPa the most unfavorable pressure drop at 3KPa (not end users), △ P into the formula, calculate the balancing valve of the caliber of the minimum flow (fully open) if its value is equal to, greater than the design flow balancing valve of the caliber to choose the right.
Experience in selection of 1-2 smaller than the pipeline diameter.
In order to improve the balance valve regulation accuracy, reduce investment, general requirements for the selected design of the valve opening between 60 to 90 percent. Recommendation: According to the Kv value selected in the opening 75% place the valve
Self-operated flow control valve: General requirements for the selected valve flow rate of 105% of design flow to accommodate the valve error of ± 5%. The maximum and minimum pressure differential of the inspection system is not in the valve differential pressure within the control. Usually operated flow control valve is equal to the size of the pipe.
Self-operated pressure control valve: General requirements for the selected flow valve Self-operated pressure control valve within the scope of self-operated pressure control valve to ensure that the minimum start pressure on it.
Limiting check valve: the pump is running in the system design and construction must be by adjusting the pump discharge valve, allowed to work within the rated range. In most of the water circulating pump and water tank majority in a horizontal plane, the use of circulating pump head only loop part of the flow resistance of pipe fittings and pumps the water cycle. Generally less than the nominal head of the pump from the pump curve can be seen this case the pump will be in the flow state, so that the pump and motor with overload. Circulation pipe fittings and pumps within the water cycle over the brush, so that not only power consumption but also affect the life of the circulation pipe fittings and pumps. So our upper limit of flow check valve installed in the pump pressure export to ensure the pump is running in the efficient region. That the safety and savings. Concentrated source of cold air-conditioning, chilled water or cooling water system is commonly used pumps in parallel. In actual operation, most of the time for part load operation, sometimes just to open a water pump. System friction is greatly decreased, the rise of water often leads to the pump motor overload. Ranging from the trip, while burn out the motor, affecting the normal operation of the refrigeration system. For example: when the two pumps in parallel work, if a pump stops, another pump flow rate will exceed 50% of the total traffic, and sometimes up to 80%. It is therefore recommended in the design of parallel pump should be equipped on each pump outlet flow of qualified devices commonly used flow control valve can be auto-stable flow. The supermarket provides current limiting valve with a current limit + – return. And meet the needs of a single pump running. Suggest that you use.sanitary fittings
Selection and pump the same caliber, and this valve can be adjusted, with return function

        tube furnace to the increasing use of mechanical drying equipment, manure dryer, the most widely used, now in Henan up Power Machinery Manufacturing Co., Ltd. technical staff to share with you the chicken manure drying machine tube The origin of the furnace. The tube furnace was originally invented as a process equipment to replace the refinery tank steamer, its birth is a landmark event in the history of the oil refining industry, the refining process into the modern from the old intermittent potstill \"continuous tube distillation\" method, began gradually to be developed. The tube furnace has also been called \"tubular reactor. This is the origin of the chicken manure dryer tube furnace.

 
 The tensioning device belt in central framework drive roller conveyor as traction and bearing components in order to a continuous transfer of the scattered and fragmentary material or product belt conveyor is a friction drive machinery for material transport in a continuous way. Apply it, the material in the transmission line feed point from the initial to the final discharge point between the formation of a material delivery process. It can be a granular material transport, and also into parts of the delivery of goods. In addition to the pure material handling, can also be compatible with the requirements of the process in the production processes of various industrial enterprises, the formation of the rhythmic flow transport line. Therefore, the belt conveyor is widely used in modern industrial enterprises.
In the underground tunnel of the mine, mine surface transportation system in the open pit and concentrator, widely used in belt conveyor. For horizontal transport or inclined transportation.

Technical advantages of the belt conveyor

First, is it reliable operation. Many of the continuous operation of production units, such as the delivery of power plant coal, steel mills and cement bulk materials transport, and ship loading and unloading in the port Dengjun use of belt conveyors. Downtime in these situations, the loss is enormous. When necessary, the belt conveyor can be a group connected to a group of continuous work.

Belt conveyor power consumption low. Due to material and the conveyor belt is almost no relative movement, not only the running resistance (about 1/3-1/5 of the scraper conveyor), and the wear and broken cargo, high productivity. These are conducive to lower production costs. Belt conveyor conveyor line adaptable and flexible. Line length as needed may be as short as a few meters long up to 10km. Can be installed in a small tunnel, and can also be mounted on the ground traffic chaos and danger over the area.

According to process requirements, the belt conveyor can be very flexible from the point or points by the material to multi-point or section of the discharge. At several points on the conveyor belt feeding (such as coal preparation plant coal bunker conveyor) or along the direction of belt conveyor length of any point by the uniform feed to the conveyor belt feeding equipment, belt conveyor The machine has become a main transportation trunk.

The belt conveyor can stockpile below the roadway in the Coal Storage reclaimer, when necessary, but also heap of different materials are mixed. Materials can be simply from the head of the conveyor unloading plow unloader or mobile tripper car at any point in the direction of conveyor length discharge

Aspirations to the world of Chinese reducer based system technology
   The reducer is a widely used in the field of defense, aerospace, transportation, construction, metallurgy, building materials, mining and other mechanical transmission equipment, specifications and varieties to millions. Previously, the deceleration of China\\ s traditional mode of production in accordance with a single set of equipment design and manufacturing, due to differences of parts interchangeability, long production cycle, high manufacturing costs, to keep up with the pace of development of similar products. Reducer manufacturer in Japan, France, Germany and other developed countries have vied for the establishment of a manufacturing base, attempt to monopolize China\\ s high-tech gear reducer product market. Production in China, a deceleration time design process takes about 15 days, 30 days of the manufacturing cycle, the agreement of two to three months delivery period, which is the common law
now Now with the technology development, the domestic enterprise groups, as long as one minute time click of a mouse, you can complete the design process; day combination assembled, you can complete the manufacturing cycle; as long as seven days of the term of the agreement, will be able to complete the transaction … This is known as \"TL combination of modular gear reducer\" new design and manufacturing technology, experts identified to confirm their technical parameters and key performance indicators reached the international advanced level.
Is just a number of enterprise groups will this technology, over time, the development of science and technology, more and more manufacturers of this technology, even better. Until then, it will produce more high quality and low price reducer out
  Let us wait and see! !

Dual independent channels, the step-up DC / DC conversion device LT8582, the device against output short circuit, input / output integrated failure of the pressure and overheating protection function. Of each channel of the LT8582 uses two integrated 42V switch: a 1.7A switch and a 1.3A slave switch, two switches can be connected together to achieve the total current limit of 3A. LT8582 2.5V to 22V input voltage range with 40V transient protection, making it ideal for applications using the input power of the single-cell Li-Ion to automotive inputs. LT8582 apply to the native power supply design, because each channel can be independently configured as a boost, SEPIC, negative output flyback converter. 4mm x 7mm DFN package and tiny externals ensures a very compact footprint while minimizing solution cost.AVR for Generator

LT8582 0.27V low VCESAT of switches connected together (in 2.75A) can provide up to 90% efficiency. The device has a power good pins for easy to use event-based sorting. The high voltage output, the LT8582 s slave switch high-power charge pump topology, the topology is very efficient, requiring only a few external components. LT8582 s switching frequency can be programmed via a single resistor or synchronized to a 200kHz to 2.5MHz external clock, thus minimizing the size of external components, and to avoid "noise critical" band. The undervoltage lockout (UVLO) is user adjustable, in order to achieve optimal system performance. Each channel requires a feedback resistor to set the output voltage, minimizing the number of external components. Other features include external synchronization, output short circuit protection and frequency foldback.

LT8582EDKD 7mm x 4mm DFN-24 package, 1000 approved the purchase price of $ 3.75. Industrial temperature (-40 ° C to 125 ° C) version LT8582IDKD one thousand approved purchase price of $ 4.13. The two versions are available from stock.

Photo Description: Dual Channel 3A, 42V step-up, negative output or SEPIC DC / DC converter

Summary of Features: LT8582

Dual-channel 42V, 3A, integrated power switch

Switch design of the master / slave (1.7A/1.3A)

Wide Input Range: working within the range of 2.5V to 22V, the maximum transient 40VWelding transformer

The power good pins for event-based sorting

Switching frequency up to 2.5MHz

Each channel can be very easily configured as a boost, SEPIC, negative output flyback converter

The low VCESAT switch: 270mV/2.75A (typical)

Can be synchronized to an external clock
Transformer company
Output short circuit protection

SHDN pin, high-gain input signal is the slow change

24-pin 7mm x 4mm DFN package

Dual channel 3A, 42V step-up / negative output DC / DC converter with integrated fault protection

Gear pump concept is very simple, its most basic form is the same gear in two sizes each other within the shell of a close co-meshing rotation within the shell similar to "8" shape, the two gears mounted on the inside closely with the outer diameter of the gear and both sides of the shell. From the extruder, the material inhaled into the mouth of two intermediate gears, and filled the space with the rotation of tooth movement along the shell, and finally discharged when the two meshing.
Speaking in terms of the gear pump is also called a positive displacement device, that is, like the one inside the cylinder piston, when the fluid space of one tooth to another tooth, the liquid was squeezed mechanically to flush out. Because the fluid is incompressible, so the liquid and the tooth at the same time can not occupy the same space, so that the liquid be excluded. This phenomenon because of the constant mesh gear in the event of a row and, therefore, in the pump outlet to provide a continuous exclude the amount of each pump, a turn, the volume of discharge is the same. With the continuous rotation of the drive shaft, the pump is continuously discharged fluid. Pump flow is directly related to the speed of the pump.sanitary fittings
In fact, a small amount of fluid loss in the pump, which makes the operating efficiency of the pump can not reach 100%, because the fluid is used to lubricate the bearings and gears on both sides, while the pump is never possible with no gap, it can not so that 100% of fluid discharge from the export, so a small amount of fluid loss is inevitable. However, the pump can run well on the most out of material, you can still reach 93% ~ 98% efficiency.
Viscosity or density changes in the process fluid, the pump will not be affected too much. If there is a damper, for example, put in the outlet side of a filter or a limiter, the pump will push fluid through them. If the damper changes in their work, that is, if the filter is dirty, blocked, or limiter on the back pressure, the pump will maintain a constant flow until it reaches the mechanical limits of the device in the weakest parts (usually equipped with a torque limiter).
For a pump speed, in fact, there is a restriction, which mainly depends on the process fluid, if the transmission oil pump is able to rotate at high speed, but when the fluid is a high viscosity polymer melt, this limit will be significantly reduced.sanitary pipe fittings
Promote blood flow into the suction side of the tooth space is very important, if this space does not fill the pump discharge flow of accurate, the PV (pressure x velocity) is also a limiting factor, and is a process variable. Because of these limitations, the gear pump manufacturer will provide a range of products of different specifications and emission (per revolution the amount of discharge by the week). These pumps will be compatible with the specific application process, so that the optimal system capacity and price.
PEP-II pump gear and shaft as one species hardened using technology to obtain a longer working life. "D" type bearing a combination of forced lubrication mechanism of the polymer by the bearing surface, and return to the inlet side of the pump, in order to ensure effective lubrication of the axis of rotation. This feature reduces the possibility of retention and degradation of polymers. Precision machining of the pump body can "D" type bearings and gear shaft precise co-ordination to ensure that not eccentric gear shaft to prevent gear wear. Parkool sealing structure with PTFE lip seal to constitute a water-cooled seal. This seal does not actually contact the surface, the sealing principle is that the polymer is cooled to a semi-molten state and the formation of self-sealing. Can also be used Rheoseal seal it in the reverse spiral groove on the table inside the shaft seal processing, the polymer can be back pressure back to imports. For ease of installation, the manufacturer has designed a ring bolt mounting surface, so that flanges and other equipment installed to match, which makes the manufacture of tube flange.stainless steel pipe fittings
PEP-II gear pump with pump specifications to match the heating element for the user matching, which ensures rapid heating and heat control. The body and pump heating, damage to these components are confined to a board with the entire pump.
Gear pump is driven by a separate motor drive, which can effectively block the upstream pressure pulsation and flow fluctuations. Gear pump outlet pressure pulsation can be controlled within 1%. Extrusion production line using a gear pump, can improve the output speed of traffic, reduce the shear and residence time of material in the extruder and reducing extrusion temperature and pressure pulsation to improve productivity and product quality.

"Energy" of the three main themes in today s world, "green", "quality" has been a high degree of attention of Governments, China has also introduced various policies around these themes, is to take various measures to promote sustainable urban and rural construction developments.
New plastic pipe fittings applied to the northern winter heating system, the epoch-making revolution has been accepted, and its energy-saving and environmental protection is the fundamental basis of its vitality, so the introduction of a few short decades, especially in the last five years, its rapid development trend is in the ascendant, the varieties of the pipe from the PB and plastic composite pipe, PP-C (B), PP-R, developed to the now widespread use of PE-Xa, PE-Xb, PE -Xc, PE-RT, brass, especially the application of PE-Xa pipe is more prominent, according to incomplete statistics, the reservation will reach 70% of the amount of warm pipe, for, the pros and cons of the pipe quality will directly affect the to warm the sound development of the industry insiders are concerned about this problem, the pipe manufacturer, however, there are several carefully quality issues rose to the height of morality to treat it today, Tangshan Road – the management company is willing to PE-Xa pipe, several quality control of key technologies to introduce to you and hope that help the industry and give each to warm ".
The quality control of PE-Xa pipestainless steel pipe fittings
Really achieve more than 50 years in order to ensure that the pipe quality, the service life of the pipe, in order to better promote the development of the industry to warm, as the pipe production enterprises should strictly control the quality of a good pipe.
The author with the experience of six years, the production of PE-X pipe PE-Xa pipe production and quality control points are the following several:
The choice of a base material
Excellent performance, stable quality raw material for producing high-quality PE-Xa pipe, China s production of PE-Xa pipe s Special Compound is totally dependent on imports from South Korea, South Korea, the production of special materials manufacturer LG Chem, Hunan ( HONAM) Petrochemical, Samsung integrated chemical and Korean oil such as several large petrochemical enterprises. If large-scale production, the author recommends that the manufacturers choose LG Chem XL1800 and Honam Petrochemical s 8100GX two grades of high density polyethylene powder as a PE-Xa pipe base material. LG Chem, the first PE-Xa pipes and PE-Xa Pipe Compound XL1800 introduced from Korea to China, paid a lot of effort for PE-Xa pipes and floor heating in China to promote the development of our floor heating industry has made tremendous contribution to LG Chemical s PE-Xa Pipe Compound production and sales volume ranked first with a fairly stable product quality, delivery is guaranteed, and its after-sales service system is very well suited for mass production. Honam Petrochemical is the first Asian production of PE-Xa Pipe Compound enterprises, production is also produced within the pipe quality and appearance quality are excellent, but due to sales of Honam Petrochemical the 8100GX this special materials rely on a Korean agency (South Korean the BCF trading company), after-sales service compared to LG Chem, is slightly inferior, and marketing efforts. Private industry materials for these two manufacturers have factories both in the author s high-volume applications, all through the thermal stability test more than 10,000 hours. Several other manufacturers in South Korea is smaller due to the production of such special materials, little promotion efforts in China, often in the domestic stock, so I do not recommend large-scale manufacturers choose.
In addition, I learned that the Southern small workshop-style factory production of PE-Xa pipe, special base compound by adding the common low molecular weight of ordinary polyethylene powder in order to reduce costs, this approach is very desirable to produce pipe performance will be greatly reduced and will eventually affect the entire industry, in order to warm the healthy development of the industry in China, I called the manufacturers and users and some of the functions of departments to monitor such behavior.
Selection and formulation of excipients
PE-Xa pipe formulations were less, and non-polluting non-toxic additives, PE-Xa pipe production used the following several additives:
(A) cross-linking agent
Di-tert-butyl peroxide DTBP formula C8H18O2
(2) the main antioxidant
Recommended Use: antioxidant 1076 (octadecadienoic propionate ester) Molecular formula C35H62O3
Antioxidant 1076 phenolic antioxidants, is an excellent non-polluting non-toxic antioxidant. Good compatibility with resin, high antioxidant properties, resistance to washing, volatile small, widely used in polyethylene, polypropylene, polystyrene, ABS, PVC, polyester and other plastic products, the biggest feature is the anti- the melting point of the oxygen dose is relatively low, more compatible with the plunger-type extruder such extrusion process without mixing function. Individual Korea s raw materials provided by the manufacturer, the main antioxidant in the recipe selected antioxidant 1010, but after I test the antioxidant 1010 due to the melting point is too high, in the Engel method processes the application can not be fully molten, not only will not achieve antioxidant effect of the application, but also in the PE-Xa pipe wall to form a small antioxidant crystalline block, so that the pressure resistance of pipe affected my humble opinion, antioxidant 1010 is not suitable for Engel of PE- Xa pipe.
(3) secondary antioxidants
Recommend the use of antioxidants DSTDP
The antioxidant DSTDP belong to the auxiliary antioxidant and phenolic antioxidants (antioxidants 1010,1076, etc.) and a synergistic effect can greatly enhance the antioxidant effect of phenolic antioxidants
According to data provided by South Korea s Honam Petrochemical Research Institute, a separate antioxidant 1076, rather than using assisted the antioxidant DSTDP production tubing, and its thermal stability test (110 ° C, the ring of the results of the stress 2.5Mpa) only up to 7000 hours the same specifications as the same wall thickness of pipe, using the combination of antioxidant formula, the thermal stability test results all the more than 8760 hours, I factory pipe using a combination of antioxidant formulations, and in accordance with South Korea s LG formula appropriate adjustments in the National Chemical Building Materials Test Center through 11,500 hours of thermal stability test, in normal operating conditions, the service life of up to 65 years. To remind the user of each PE-Xa pipe respective manufacturers in order to reduce costs and improve the appearance quality of the pipe, do not use these two antioxidants, long-term performance of this pipe does not have any guarantee that the method of figuring : added antioxidants pipe look slightly yellow, transparency will reduce, not add antioxidants pipe color plainer higher degree of transparency, so that the PE-Xa pipe should not be too fancy pipe appearance plainer. transparent, this pipe is likely not added antioxidant products.sanitary pipe fittings
3 control of the mixing process of raw materials
(1) PE-Xa pipe production using a special piston extruder, this production process the raw material mixing features, and accessories in the cross-linking agent and antioxidant in HDPE are distributed evenly a direct impact on the performance of the pipe, This is controlled by the mixing process, in order to ensure the stable quality of the pipe, the mixing process, the following tasks:
(2) mixing time :12-15 minutes
(3) mixer speed :250-350rpm, if conditions allow, it is recommended to use a two-speed mixer accessories in the high-speed mixing, mixing for 3-5 minutes, replaced by low-speed mixing.
(4) mixing temperature: a good mix raw material temperature should be between 30-35 ℃, the temperature is too low, is not conducive to the dispersion of the crosslinking agent in the HDPE powder, resulting in uneven pipe cross-linking, the temperature is too high will so that the crosslinker volatile, resulting in the pipe cross-linking is too low, the thermal strength of the pipe to reduce, and ultimately shorten the life of the pipe. In order to ensure a proper mixing temperature, it is recommended to use the mixer with a water-cooled devices.
Process temperature control
(1) to set the policy – of the process temperature in the pipe does not affect the degree of crosslinking and the appearance quality of the premise, the temperature set as low as possible.
(2) the temperature of the mold the front of the feed zone (body, adapter above) can not be too high, the maximum should not exceed 180 ° C, otherwise it will appear the phenomenon of pre-crosslinked and crosslinked materials in advance will cover the inner wall of the adapter and shunt at the cone, over time will cause carbonization off, together with the pipe extrusion, in the formation of impurities within the wall, and can easily leak in the construction of suppressing and the process of using, and recommended that each PE-Xa pipe production enterprises regularly clean up the squeeze the machine adapter and shunt cone.
(3) The raw materials of the formula is fixed, the production process temperature in accordance with changes in pipe production speed and make the appropriate adjustments, the only way to ensure the pipe cross-linked stable.
Production rate and degree of crosslinking of control
(1) In order to ensure the long-term performance of PE-Xa pipe, taking into account the manufacturer s production efficiency, it is recommended that the production rate should be controlled at 1.2-1.6 m / min.
(2) the degree of crosslinking of PE-Xa pipe is not as high as possible, the reason for the degree of crosslinking of PE-Xa pipe is higher than the degree of crosslinking of PE-Xb pipe, to eliminate both because of cross-linked structure different impact on performance differences, but the cross-linking through the high will affect the pressure resistance of the pipe, from personal experience, degree of crosslinking should be controlled within 80% -85% range.
(3) The following is the Tao Cheng a group of test data, for information:
(4) In order to ensure the long-term performance of PE-Xa pipe, taking into account the manufacturer s production efficiency, it is recommended that the production rate should be controlled at 1.2-1.6 m / min.
(5) the degree of crosslinking of PE-Xa pipe is not as high as possible, the reason for the degree of crosslinking of PE-Xa pipe is higher than the degree of crosslinking of PE-Xb pipe, to eliminate both because of cross-linked structure different impact on performance differences, but the cross-linking through the high will affect the pressure resistance of the pipe, from personal experience, degree of crosslinking should be controlled within 80% -85% range.
(6) The following is the Tao Cheng a group of test data, for information:
The degree of crosslinking
Production rate
At room temperature blasting pressure
Sample a
85%
1.4m/min
4.5Mpa
Sample two
85%
1.8m/min
4.0Mpasanitary fittings
Sample three
80%
1.5m/min
4.4Mpa
Sample four
95%
1.5m/min
3.8Mpa
6. Pipe factory inspection
Factory inspection of the pipe should be strictly carried out in accordance with the the GB/T18992.2-2003 standards requirements of the project inspection, for each test them here in this standard does not mention the thickness deviation rate, I suggest that each production companies may refer to the industry standard CJ/T205-2000 requirements, wall thickness deviation of not more than 14%

Single rotor hammer crusher is a kind of hammer crusher, crusher horizontal rotor class, it is divided into reversible and irreversible of two types.

          Reversible hammer crusher rotor rotation, first in one direction and the material for crushing. Linings, in the direction of the sieve and a hammer end by the wear and tear. Wear to a certain extent, so that the rotor in the opposite direction rotation, this time Red Star Crusher hammer the other end and the other lining and sieve, thus working continuously for the life of almost doubling. Single rotor is not reversible hammer crusher rotor only rotates in one direction. When the hammer end of the wear and tear to a certain extent, must stop to swap the direction of the hammer (turn 180 °) or replacement of the hammer.

         Single rotor hammer crusher chassis, upper and lower parts, steel plate welded into the various parts bolted together. The liner is made from high manganese steel liner wear can replace them. In order to facilitate maintenance, adjustment and replacement of the sieve, front and rear sides of the chassis to open manholes. In order to facilitate the replacement of the hammer, on both sides of the enclosure wall opening manholes. Several rows of disc installed on the spindle of the Red Star Crusher, there are two rows of pin holes in the rotor disc, when the hammer end of the wear and tear can pin inserted in the outer hole, thereby adjusting the gap between the hammer and sieve. Hammer with pin hinge in the disc between each row, in order to prevent axial movement of the disc and hammer, the disc ends with a compression hammer plate to lock the nut. Rotor supported at both ends in the rolling bearing, bearing bolted to the chassis. The direct connection of the spindle motor with flexible coupling. In order to make the rotor smooth operation, equipped with a flywheel at the other end of the spindle.

         Arc-like discharge sieve plate mounted below the rotor, the two ends of the sieve is mounted on the beam, the outermost sieve plate pressed screen arranged in the direction perpendicular to the direction of motion of the rotor. Sieve clearance protruding parts formed by the middle of the sieve. In order to facilitate the discharge of materials constitute the outward expansion of the sieve slit between the sieve, and also tilt to the rotor direction. Installed in the feed section to combat the board, is the first place to withstand the impact and wear of materials. Crack down on the board from the pallet and liner and other components assembled. The pallet is welded steel plates, the lining of the above is the high manganese steel castings, assembled with two-axis rack in the Red broken on the body of the machine. Feed angle can be used to adjust the bolt to adjust the liner wear can be replaced. Hammer is a hinge mounted on the pin on because it is free-hanging, high-speed rotating hammer out there and along the rotation of the pin, when the case of hard broken objects, in order to avoid mechanical damage, plays a protective role. Hard broken objects (such as iron objects) into the crushing chamber, under the blow of the hammer, non-broken hammer row to the end of the screen bar and regularly removed by the ad hoc larvae in L, to avoid hammers and screen bars breakdown. In addition, the transmission device is also equipped with special safety device, use the safety pin was cut in the overload, the motor and the crusher rotor disengaged, and play a protective role.

    Spindle taper hole machining accuracy, and have a direct impact on the lathe spindle taper hole axis runout accuracy. Plant new product prototype and small batch process equipment is not matching, jig grinding spindle taper hole with two center frame support in front of the spindle bearing journal locations, by grinding cone alignment holes. As the center rack of poor rigidity, clamping error inconsistent, looking for is more time-consuming low precision of the spindle taper grinding, after repeated several times grinding, precision can only reach the remote 300mm at the radial runout 0.008 ~ 0.01mm taper contact surface of 70%, the difficulty of the operation, production efficiency is low and not suitable for mass production. To this end, we designed a special fixture as shown in the grinding spindle taper.
A fixture structure
Taper jig grinding within the base 12 and bracket 10, bracket 7 and connected sets composed. The front bracket 10 and rear bracket 7 in base 12. The workpiece can be safe, smooth handling, before and after the bearing holes are split support structure. In order to improve the contact stiffness and service life of bearing holes to protect the workpiece bearing surface is not scratched, and lubrication of the bearing surface, the former after the bearing hole adopt mosaic copper tile sliding bearings 8,9. Two sliding bearing each of the three copper tile. Former bearing bush made into a tapered bore with the workpiece 1:12 cone to match. , After the bearing bore and base junction plane scraped through assembly alignment, to ensure the bearing hole concentricity and parallelism grinder rail bed in the 0.005mm range, and with the grinder head frame, spindle center and the wheel spindle center contour. In order to prevent the bearing hole surface wear their loss of accuracy due to the former affect the workpiece taper machining accuracy, and need time on a regular basis (every three months or 300) test fixture accuracy.
2 Work
The axial positioning of the workpiece by the tension spring 13 on the workpiece and the back-end connection through the card the workpiece back taut (symmetric taut), forcing the ball arrived in pressure in the carbide flat top (flat top 3 14 mounted on the spindle taper hole, fixed spindle does not turn), thus limiting the axial movement of the workpiece, and ensure the accuracy of the positioning of the workpiece. Flange rotation, the lever 4 and connection to drive the workpiece and the rotation, the grinding movement.Unloading the workpiece, simply loosen the three brass screws 5 and before the lock nut on the rear bracket, and then turn off before and after the bracket to remove the workpiece.
3 Summary
Fixture, workpiece machining accuracy of this structure stable up to the tapered bore bearing journal runout accuracy (at 300mm 0.005mm) requirements surface roughness Ra0.4μm, coloring test with standard taper-like regulation, the contact surface more than 80%. Meet the technical requirements of the spindle, and the accuracy of reserve volume, and easy to operate and improve productivity.