Juzhan technology is the first choice for the most

2022-07-24
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Juzhan technology is preferred for Hohhot cable and cable bridge.

Juzhan technology is preferred for Hohhot cable and cable bridge.

Inner Mongolia Q345B precision pipe small caliber thin wall precision seamless steel pipe is supplied from stock with high precision and high finish. After heat treatment, the steel pipe has no oxide layer, and the inner wall has high cleanliness. The steel pipe bears high pressure, does not deform in cold bending, and has no cracks in expanding and flattening. It can be used for various complex deformation and mechanical processing

vv - copper core cross-linked vinyl chloride insulated PVC sheathed power cable

zr VV - copper core PVC insulated PVC sheathed flame retardant power cable

nh VV - copper core PVC insulated PVC sheathed fire-resistant power cable

6. If the cable is directly buried, pay attention to the soil conditions. Generally, the buried depth of the cable under the building is not less than 3M, soft or complex surrounding environment, such as cultivated land, construction site or road, shall be buried to a certain depth (.7 ~ 1m) to prevent accidental damage to directly buried cables, and obvious signs shall be erected if necessary

yjv - copper core XLPE insulated PVC sheathed power cable

zr YJ this V-copper core XLPE insulated PVC sheathed flame retardant power cable

nh YJV copper core XLPE insulated PVC sheathed fire-resistant power cable

vv - copper core cross-linked vinyl chloride insulated PVC sheathed power cable

zr VV - copper core PVC insulated PVC sheathed flame retardant power cable

the conductor is changed from the original strand structure to the normal strand, which can increase its bending performance, and then the steel wire is braided outside the conductor to increase its strength

5. The control wire core can be braided with tinned copper wire and steel wire, which is also a good method

cable model composition

part I: use the capital letter M to represent the series code of flame-retardant cables for coal mines

how to improve the service life of mining cables

1 and increase the flexibility of cables for coal miners

2. Increase the relative slip of the control core

3. Increase the strength of cable conductor of coal mining machine

4. Change the conductor from the original strand structure to the normal strand, which can increase its bending performance, and then braid the steel wire outside the conductor to increase its strength

5. The control wire core can be braided with tinned copper wire and steel wire, which is also a good method

cable model composition

part I: use the capital letter M to represent the series code of flame-retardant cables for coal mines

Part II: use capital letter V to indicate the code of PVC insulating materials; Use the capital letter YJ to indicate the code of XLPE insulation material

how to improve the service life of mining cables

1 and increase the flexibility of cables for coal miners

the preliminarily selected cable section shall also be verified according to other conditions. During the verification, because the low-voltage short-circuit current is small, and the protection device generally acts instantaneously, the thermal stability during short-circuit generally meets the requirements, so it is unnecessary to consider. However, when fuse protection is adopted, the rated current of the melt shall match the cable section, otherwise the cable will overheat. For trunk cables, it is not necessary to verify the mechanical strength. Generally, the section of low-voltage cable is not selected according to the economic current density. Because the low-voltage line is short and the annual utilization hours are small, it has little impact on the power supply economy

(2) selection method of high-voltage cable cross section

due to the large and strong dispersion of the cable, the poor manufacturing thermal conditions of industrial products and the large short-circuit current of the high-voltage line, the temperature of the cable core will exceed the short-term allowable temperature of its insulating material and be damaged when the short-circuit current passes through in a short time. Therefore, the thermal stability of high-voltage cable in case of short circuit must be considered. The section of the bridge like high-voltage cable composed of the pasted strain gauge in one line shall be selected according to the economic current density, and verified according to the long-term allowable current, allowable voltage loss and thermal stability conditions in case of short circuit

resistance test

this is also the key to inspect the quality of PVC pipes, especially for threading pipes, the ductility is even more important! To test the ductility of PVC pipe is very simple, just break the two ends of a PVC pipe toward the middle. Good quality PVC pipes will not be broken, while poor quality pipes will not be able to bear the fracture

Juzhan technology is preferred for Hohhot cable bridge

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