CN109390833B

CN109390833B - Towing cable connection process method

Info

Publication number: CN109390833B
Application number: CN201811138416.4A
Authority: CN
Inventors: 付俊彪; 李海亮; 郝红国; 张健; 吕保; 黄正全; 泮志亮
Original assignee: China Huaye Group Co Ltd
Current assignee: China Huaye Group Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-07-10
Anticipated expiration: 2038-09-27
Also published as: CN109390833A

Abstract

The invention discloses a dragging cable connection process method, which mainly comprises the following steps of connecting single-phase wire cores in 3 steps: firstly, the conductor wires of which the two broken ends of the cable are to be connected into the same phase wire core are respectively divided into a plurality of strands; secondly, folding the stranded conductor wires of the wire cores at the broken ends in the previous step from the middle part respectively, and mutually hooking the stranded conductor wires in a one-to-one correspondence manner by hooks formed after folding; thirdly, the folded sections behind the folded points of the conductor wires of each strand in the previous step sequentially penetrate through gaps between adjacent strands of the reserved sections in front of the folded points in a staggered mode, and are repeatedly and circularly woven together in a penetrating mode sequentially until the lengths of the folded sections are woven; and after weaving, carrying out insulation treatment on the connection part of the single wire core. By adopting the method, the over-current sectional area of the conductor wire can be ensured, the tensile stress of the cable during dragging can be ensured, and the safety and reliability of power supply can be ensured. The process method is simple and easy to operate, the modification cost is very low, and the popularization value is high.

Description

Towing cable connection process method

Technical Field

The invention belongs to the technical field of electricians, and particularly relates to a towing cable connection process method.

Background

Because the electric scraper has the advantages of energy conservation, environmental protection, high efficiency and the like, most of domestic and foreign mine main force ore removal equipment is the electric scraper. By taking an EST-3.5 type electric scraper with 1000v voltage class selected by ore removal equipment of a certain mountain as an example, the electric scraper has no cable arrangement device, so that the underground operation environment is severe, and the dragging cable is frequently scratched and broken after production. The equipment uses 1000V voltage, the voltage level is higher, the damaged cable can not be reused without proper treatment, and great potential safety hazard is brought to operators. If the cable is replaced every time, the production cost is greatly increased and the influence on the overall benefits of the mine is large due to the fact that the price of the dragging cable is high.

To the cable connection that pulls that breaks and handle, current electrician's wiring technique can't reach the safe handling requirement of longer time, and the cable joint is difficult to stand and is constantly dragged the atress back and forth, often is dragged again soon and takes off the joint, or causes the joint department conductor sectional area to be little, can not satisfy the requirement of bearing this electric power, becomes the risk point that causes the incident easily, or the whole cross-section of cable joint is more than the cross-section of former cable itself a lot of, influences the cable and pulls, also pleasing to the eye.

Disclosure of Invention

In order to solve the technical problems, various attempts are made to creatively find a process method for connecting a dragging cable, if the broken end of the cable is damaged, the damaged part of the broken end of the cable to be connected is removed firstly, and then the cable is connected, wherein the process method for connecting comprises the following steps: peeling off a section of outer insulation skin 5 of two broken ends 2 of the cable 1, preferably peeling off at least 40cm of outer insulation skin 5 to expose each phase wire core 3 with corresponding length in the cable; stripping off a section of the inner insulation skin 6 of each phase wire core 3 exposed after the outer insulation skin 5 of the cable 1 is stripped off, wherein the inner insulation skin 6 is preferably stripped off at least 20cm long conductor wires 4 with corresponding lengths exposed in the phase wire cores 3; then connect each phase line core 3 respectively, the connection of single looks core 3 includes the following step:

firstly, dividing conductor wires 4 of two broken ends 2 of a cable 1, which are to be connected into a same phase wire core 3, into a plurality of strands, wherein the strands can be 3 strands or more than 3 strands, each strand of conductor wire 4 of one broken end 2 is respectively counted as A1 and A2 … An, each strand of conductor wire 4 of the other broken end 2 is respectively counted as B1 and B2 … Bn, and n is the number of the divided strands; in order to prevent the conductor wire 4 of the same strand from being scattered, the head and the root of the conductor wire 4 of the same strand can be respectively wound by adhesive tapes 4;

step two, the split conductor wires 4 of the phase wire core 3 of the two broken ends 2 in the previous step are folded from the middle part respectively, and are mutually hooked in a one-to-one correspondence manner by the hooks formed after folding, namely: the folding point of A1 is hooked with the folding point of B1, the folding point of A2 is hooked with the folding point of B2, and so on until the folding point of An is hooked with the folding point of Bn;

step three, the folded sections 9 after the folding points 10 of the conductor wires 4 in the previous step are sequentially crossed and penetrated through the gaps between the adjacent strands of the reserved section 11 before the folding points 10, and are mutually woven together, for example: the folded section 9 of A1 is passed through the gaps of the reserved section 11 conductor wires 4 of A1 and A2 strands, the folded section 9 of A2 is passed through the gaps of the reserved section 11 conductor wires 4 of A2 and A3 strands, and the like, that is, the folded section 9 of An is passed through the gaps of the reserved section 11 conductor wires 4 of An and A1 strands, and the two gaps of the conductor wires 4 are passed through each time, and the weaving is repeatedly and circularly performed in sequence until the length of the folded section 9 is completely woven; weaving B1 and B2 … Bn strands of conductor wires 4 by the same method, removing adhesive tapes which prevent the same strand of conductor wires 4 from being scattered and wound at the head and the root of each conductor wire 4 after weaving is finished, and carrying out insulation treatment on the connection part of the single phase wire core 3; the insulation treatment can be winding by using an insulation tape with corresponding voltage, and in order to ensure the insulation effect, the winding is preferably not less than 3 layers;

after the phase wire cores 3 are connected, the phase wire cores 3 can be completely wound into a whole by using a black adhesive tape. In order to enhance the anti-wear performance of the cable at the connecting part, an anti-wear layer 8 is added outside the insulation treatment, and the anti-wear layer 8 can be a wound black adhesive tape, and is preferably wound by at least 3 layers. In addition, according to needs, in order to increase waterproof performance, waterproof layer 7 is added outside insulation treatment, waterproof layer 7 can be waterproof layer 7 wound with waterproof adhesive tape before 8 black adhesive tapes of anti-abrasion layer are wound, and waterproof effect of not less than 3 layers of waterproof adhesive tape winding is more guaranteed. In the use process, preferably, the cable is checked once every 8 hours to see the abrasion condition of the cable, and the abrasion-proof layer 8 is repaired as required, so that the service life of the joint is better ensured.

Preferably, the strands divided by the conductor wires 4 of the same phase wire core 3 in the step one are kept uniform in thickness, so that the tensile capacities of the strands are relatively consistent.

Preferably, in the step one, the conductor wires 4 of the same phase wire core 3 are respectively divided into 5 to 12 strands, so that the condition that each strand is too small and the single-strand tensile force is too small due to too many strands can be avoided, the requirement on connection strength can be ensured, and the weaving is too complicated; and the single strand is not too thick and difficult to weave due to too few strands, and the weaving strength is not influenced.

Preferably, the conductor wires 4 of the same phase wire core 3 are divided into even number strands in the first step, and if the number of the conductor wires 4 in the same phase wire core 3 is odd, 1 of the conductor wires 4 can be cut from the folded part of the conductor wires in the second step, so that the weaving process is more convenient.

Preferably, in the second step, the folding points 10 of the stranded conductor wires 4 are located on the same cross section, so that the tensile force born by each stranded conductor wire 4 in use is relatively uniform, and the influence on the cross section area of the conductor for electrifying and even accidents caused by single-strand breakage due to uneven tensile force can be avoided.

By adopting the connection process method of the dragging cable, the conductor wires 4 of the phase wire cores 3 are respectively divided into a plurality of strands for cross weaving, so that the tensile stress of the cable 1 during dragging is also ensured on the basis of ensuring the over-current sectional area of the conductor wires 4; through carrying out waterproof, insulating, wear-resisting processing to the connection position, ensure power supply safe and reliable, guarantee operating personnel safety, cable junction cross-section thickness is even, does not have the swell, makes things convenient for equipment to pull the cable, and holds concurrently beautifully. The process method is tried and researched in a certain mine, the feasibility of the process method is determined, the safe construction of operators of the electric scraper is ensured, and the construction cost is reduced. The process method is simple and easy to operate, the modification cost is very low, and the popularization value is high.

Drawings

FIG. 1 is a schematic diagram of a plurality of conductor wires in a single-phase wire core being hooked together in a folded manner;

FIG. 2 is a schematic view of a cable break;

FIG. 3 is a schematic cross-sectional view of a cable selected from cables having three phase cores;

FIG. 4 is a schematic view of a cable having a broken end stripped of a portion of the insulation, the schematic view being selected for a cable having three phase cores;

fig. 5 is a schematic cross-sectional view of a phase core connection process of the cable;

in the figure: 1-cable, 2-broken end, 3-phase wire core, 4-conductor wire, 5-outer layer insulation skin, 6-inner insulation skin, 7-waterproof layer, 8-anti-abrasion layer, 9-folded section of conductor wire 4, 10-folded point of conductor wire 4, and 11-reserved section of conductor wire 4.

Detailed Description

The process for connecting a trailing cable will be described in detail with reference to an example, which is only one embodiment of the process and is not intended to be the only embodiment, and therefore the example is not to be construed as limiting the scope of the claimed invention.

The connection process method of the embodiment comprises the following steps: firstly, stripping a section of 40cm length of an outer layer insulating skin 52 of two broken ends 2 of a cable 1 to expose phase line cores 3 with the length of about 40cm in the cable 1; stripping off a section of the inner insulation skin 6 with the length of about 20cm of each exposed phase wire core 3 with the length of 40cm, and exposing one section of the conductor wire 4 with the length of 20cm in each phase wire core; then connect each phase line core 3 respectively, the connection of single looks core 3 includes the following step:

firstly, 20 cm-long conductor wires 4 of two broken ends 2 to be connected into the same phase wire core 3 are respectively divided into 6 uniform strands, each strand of conductor wire 4 of one broken end 2 is respectively counted as A1 and A2 … A6, and each strand of conductor wire 4 of the other broken end 2 is respectively counted as B1 and B2 … B6; in order to prevent the conductor wire 4 with the same strand from being scattered, the head and the root of the conductor wire 4 with the same strand are respectively wound by adhesive tapes;

secondly, the split conductor wires 4 of the phase core 3 of the two broken ends 2 of the previous step are folded in half from the middle part of the exposed part by about 10cm respectively, and are hooked with each other in a one-to-one correspondence manner by the hooks formed after folding, namely: the folding point of A1 is hooked with the folding point of B1, the folding point of A2 is hooked with the folding point of B2, and so on, the folding point of A6 is hooked with the folding point of B6; the step keeps the same position of the cross section of each strand of conductor wire opposite folding point 10;

thirdly, the folded sections 9 after the folding points 10 of the conductor wires 4 in the previous step are sequentially crossed and passed through the gaps between the adjacent strands of the reserved section 11 before the folding points, and are mutually woven together, for example: the folded section 9 of A1 passes through the gaps of the reserved section 11 conductor wires 4 of A1 and A2 strands, the folded section 9 of A2 passes through the gaps of the reserved section 11 conductor wires 4 of A2 and A3 strands, and the like, that is, the folded section 9 of A6 passes through the gaps of the reserved section 11 conductor wires 4 of A6 and A1 strands, and passes through the gaps of two conductor wires 4 each time, and the weaving is repeated and circularly and sequentially carried out until the length of the folded section 9 is completely woven; weaving B1 and B2 … B6 strands of conductor wires 4 by the same method, removing adhesive tapes which prevent the same strand of conductor wires 4 from being scattered and winding the head and the root of each conductor wire 4 after weaving is finished, and winding 3 layers of insulating tapes at the joint of the single phase wire core 3 for insulating treatment;

after the connection of each phase of wire core 3 is finished, in order to increase the waterproof performance, the waterproof layer 7 is formed by winding 3 layers of waterproof adhesive tape, and then the abrasion-proof layer 8 is formed by winding 3 layers of black adhesive tape, so that the abrasion-proof performance of the connection part of the cable is enhanced. In addition, electrician personnel are arranged in the using process, the cable is checked once when the cable is used for 8 hours, the abrasion condition of the cable is seen, and the anti-abrasion layer 8 is repaired according to the requirement, so that the service life of the connecting part is better ensured.

Claims

1. A towing cable connection process method is characterized in that an outer layer insulating skin (5) of two broken ends (2) of a cable (1) is stripped by one section; peeling off a section of the inner insulation skin (6) of each phase wire core (3) exposed after the outer insulation skin (5) of the cable (1) is peeled off; then connect each looks sinle silk (3) respectively, its characterized in that: the connection of the single phase wire core (3) comprises the following steps:

the method comprises the following steps: conductor wires (4) of two broken ends (2) of the cable (1) to be connected with the same phase wire core (3) are respectively divided into a plurality of strands, each strand of conductor wire (4) of one broken end (2) is respectively counted as A1 and A2 … An, each strand of conductor wire (4) of the other broken end (2) is respectively counted as B1 and B2 … Bn, and n is the number of the divided strands;

step two: folding the stranded conductor wires (4) of the two broken ends (2) and the phase wire cores (3) in the previous step from the middle part respectively, and mutually hooking the stranded conductor wires in a one-to-one correspondence manner by hooks formed after folding;

step three: weaving the folded sections (9) behind the folding points (10) of the strands of conductor wires (4) in the previous step in a mode of sequentially crossing gaps between adjacent strands of the reserved sections (11) in front of the folding points (10) in a staggered mode, and circularly and sequentially penetrating until the length of the folded sections (9) is woven; b1 and B2 … Bn strands of conductor wires (4) are braided by the same method, and after the braiding is finished, the connection part of the single phase wire core (3) is subjected to insulation treatment.

2. The process for joining a trailing cable according to claim 1, wherein: the length of one section of the outer insulation skin (5) of the two broken ends (2) of the cable (1) is peeled off is not less than 40 cm.

3. The process for joining a trailing cable according to claim 1, wherein: the length of one section of stripped inner insulation skin (6) of each phase wire core (3) exposed after the outer insulation skin (5) of the cable (1) is stripped is not less than 20 cm.

4. The process for joining a trailing cable according to claim 1, wherein: in the first step, the conductor wires (4) of the same phase wire core (3) are respectively divided into more than 3 strands.

5. The process for joining a trailing cable according to claim 1, wherein: in the first step, the head and the root of the conductor wire (4) are respectively wound by adhesive tapes.

6. The process for joining a trailing cable according to claim 1, wherein: in the first step, the thickness of each strand of the conductor wire (4) of the same phase wire core (3) is kept uniform.

7. The process for joining a trailing cable according to claim 1, wherein: in the first step, the conductor wires (4) of the same phase wire core (3) are respectively divided into 5-12 strands.

8. The process for joining a trailing cable according to claim 1, wherein: in the first step, the conductor wires (4) of the same phase wire core (3) are respectively divided into even number of strands.

9. The process for joining a trailing cable according to claim 1, wherein: and in the second step, the folded points (10) of the stranded conductor wires (4) are positioned on the same cross section.

10. The process for joining a trailing cable according to claim 1, wherein: and the third step of insulation treatment is to wind not less than 3 layers of insulation tapes with corresponding voltage.

11. The process for joining trailing cables according to any one of claims 1 to 10 wherein: and a waterproof layer (7) is added outside the insulation treatment of the cable joint.

12. The process for joining trailing cables according to any one of claims 1 to 10 wherein: and a wear-resistant layer (8) is added outside the insulation treatment at the cable joint.