For large-section three-core or four-core low-voltage power cables, the conductive core generally adopts a fan-shaped structure, which can greatly reduce the diameter of the cable, save the cable sheath material, and reduce the cost by 15% to 20%, so it has better Economic benefits.
In the past, when our company was engaged in fan-shaped insulated wire core cable, sometimes the wire core would turn over, which not only failed to reduce the diameter of the cable core and reduce the cost of the design, but also seriously damage the cable, affecting the cable appearance l in order to prevent the core Turning around requires frequent twisting of the core, which not only seriously affects productivity but also damages the pre-twisted equipment. In order to solve this problem, after repeated argumentation and practical trials in principle, we found that the following set of simple fan-shaped rolling wheel devices can completely eliminate the problem of cable-turning of the fan-shaped core.
1. In the preceding step of each stranded wire core into the twisted configuration, a fan-shaped rolling wheel, as shown in the figure, is added to ensure that the relative angles between the fan-shaped cores and the stranding core before the stranding winch are fixed. This fan-shaped rolling wheel can be applied to all fan-shaped or semi-circular cores, and it does not damage the core insulation. The specific dimensions in the figure are determined by the selected bearing outer diameter.
2. Principle Description To ensure the roundness of the fan-shaped core after cable stranding, each core must be twisted one turn in addition to a certain amount of bending within each cable pitch. Once the core twists properly, it will roll over. Before each fan-shaped core stranding station, fan-shaped roller wheels are used to control the relative angle between each core and the axis of the reeling cage so that the fan-shaped cores can be evenly twisted during the cabling process and ensured at each cabled end. Each wire core in the pitch has a one-week torsional deformation, so that the fan-shaped core cable movement in line with the law.
The author also found that the principle of fan-shaped core cable and armored cable steel belt wrapping is the same. We can completely regard the arc of the fan-shaped core as a curved steel belt, and the other parts of the circle can just be used as the core of the arc-shaped steel belt to be wrapped. This comparison can make everyone from the steel belt guide 4. The water cooling cooling water of the casting machine is used to cool the crystallizing wheel and the steel belt. The cooling water nozzle is specially designed and manufactured. The cooling water of the steel strip sprayed by the nozzle should be in the form of a bowl, so that the steel strip can be cooled more evenly. The cooling water cooling the crystal wheel should be fan-shaped when ejected by the shower head. These cooling waters mainly cool the periphery of the cross-section of the crystallizer wheel, thereby determining the direction of heat dissipation of the cast billet and the formation direction of columnar crystals inside the billet.
There are 8 cooling water areas, namely, steel zone 1, steel zone 2 I crystal wheel l medicine, crystal wheel 2 doctors, crystal wheel of the two sides of the cooling zone; pressure roller cooling doctor, demoulding device cooling area. The important cooling zone is the steel zone l zone, the crystallizer wheel l medicine and the roller cooling zone. These three cooling zones determine the quality of the slab's internal quality. The remaining cooling zone is the temperature and crystallization of the controlled strand casting slab. Wheel temperature and strip temperature. Under normal circumstances, the pressure of the cooling water in zone l and zone I of the crystallizing wheel is controlled at about 0.1 MPa, while that in other areas is controlled at about 0.2 MPa, which can be adjusted according to actual production conditions. The role of enlightenment, to understand the possibility of assembly fan rolling wheel and an important role.
3. Running operation (1) Adjustment of the fan-shaped roller wheel angle 3 For the 8 fan-shaped wheels formed by the roller wheel, I should move to the axis of the reeling cage and the combination should be close to one circle. When forming a winch, the fan-shaped core is in the right position in the fan-shaped rolling wheel, which is not subject to excessive extrusion. The fan roller device should be adjustable angle.
(2) The pre-twist adjustment is made so that the fan-shaped cores before and after the fan-shaped rolling wheel are in a natural position and are not subject to excessive torque.
(3) Normal operation The use of a fan-shaped roller in the normal cable production process is not affected by the fan-shaped core angle in the pay-off plate, and is not limited by the length of the core. It is not used. The pre-twisting device and the angle of the revolving rolling wheel can be prevented from turning over without changing the angle. The simplest method for the entire adjustment process is: first open the niobium-shaped rolling wheel and use the pre-twisting device to produce; after opening and closing (only to produce 2 to 3 pitch lengths), press the (1) and (2) The method is adjusted separately, and the angle of the fan-shaped rolling wheel is fixed and the pre-twist is adjusted, and normal high-speed cabling production can be started.
4. Conclusions (1) The method described in this article for eliminating the turning of a fan-shaped core is feasible. This has been fully proven for the actual production of our company.
(2) This method provides a reliable guarantee for meeting the design requirements of the fan-shaped core cable laying technology, which can reduce the labor intensity of the operator and can increase the labor productivity.
(3) The method is simple, easy to implement, easy to operate, and effective.
(4) This method is also suitable for semi-circular wire core cable. For the twisting of the profiled wire, this method can also be followed. In special circumstances, the water pressure in the crystallizing wheel 1 zone and the crystallizing wheel 2 zone can be equal to about 0.1 MPa. The control of cooling water flow and pressure will directly affect the service life of the crystal wheel and the steel strip and the quality of the slab. Improper control of the cooling water will burn out the mold cavity of the crystal wheel and deform the steel belt.
1.Uses:Mainly for building construction,packing and furniture.
2.Material:Q195 or 235
3.Spesifications:Countersunk,Checkered head,Diamond Point,Polished, galvanized.
4.Length:1/2"-10",BWG4-20 for all kinds of round Nails.
5.Packing:
A).small plastic bag and small box of 1kg,2.5kg,3kg,5kg
B).In carton or bag of 25kgs/20kgs/50kgs
C).As per option
6.Reference price:$500-550 per ton FOB Tianjin
7.Trial order 5Tons
8.Loading qty:22-26tons
9.Delivery time:10-15days from S/C date
10.Terms of payment: 100% TT, or Western Union, 30% TT deposit or L/C at sight
Roofing Nails
Metal Roofing Nails,Umbrella Roofing Nails,Stainless Roofing Nails,Galvanized Roofing Nails
Anping Bochuan Wire Mesh Co., Ltd. , https://www.wiremeshbocn.com