CN106229903A - A kind of manufacture method of cable transition joint - Google Patents

Abstract

The invention relates to a method for manufacturing a cable intermediate joint. A first shrinkable tube is sleeved on the outer side of the intermediate joint, and high pressure is wrapped around the connection between the first heat-shrinkable tube and the outer sheath on the corresponding cable. Rubber self-adhesive tape to ensure the sealing of the interface between the first heat-shrinkable tube and the corresponding cable, a second heat-shrinkable tube is set on the first heat-shrinkable tube, and the two sides of the second heat-shrinkable tube Both ends are covered with high-pressure rubber self-adhesive tapes that exceed the two ends of the first heat-shrinkable tube; compared with the prior art method of waterproofing using a half-lap wound waterproof tape, the waterproof and moisture-proof of the intermediate joint made by the method of the present invention Performance is better.

Description

A method of manufacturing a cable intermediate joint

technical field

The invention relates to a manufacturing method of a cable intermediate joint.

Background technique

With the development of industrial automation and monitoring system technology, the reliability of equipment operation requires more and more cables, and the accuracy requirements are getting higher and higher; the cable intermediate joint refers to the connection between various sections of cables A kind of joint made; for the long-term, safe and stable operation of the equipment, the requirements for the intermediate joint in the middle of the cable are becoming more and more stringent, especially for some intermediate joints on cables installed in humid environments such as underground and pipelines. The moisture-proof and waterproof performance of the joint is required to be higher.

Chinese patent CN103972825A discloses a method for making a wrap-around intermediate joint, and discloses a method for waterproofing the intermediate joint in steps 4.1-4.7 of its announcement text, including the following steps: 1. One of the cables leads to the other cable with a semi-overlapping wrapping waterproof tape; 2. Bind the core cable joints of each phase with PVC tape; 3. Use copper braided wires and constant force springs on the outside of the intermediate joint to form mechanical protection layer; 4. A semi-overlapping waterproof tape wraps around the outer side of the mechanical protection layer.

From the above, it can be seen that the way to realize the waterproofing of the intermediate joints in the prior art is to rely on the semi-overlapped waterproof tape; With the increase of service time, the moisture in the surrounding environment of the intermediate joint may still pass through the gap between the overlapping parts on the waterproof tape, and the waterproof and moisture-proof performance is poor.

Contents of the invention

The purpose of the present invention is to provide a method for manufacturing a cable intermediate joint with better waterproof and moisture-proof performance.

In order to achieve the above purpose, the technical solution of a method for making a cable intermediate joint in the present invention is:

A method for manufacturing a cable intermediate joint, including a cable, comprising the following steps:

A. Wrap each connected fiber core with insulating tape half-lap, so that the two ends of the insulating tape cover the insulation skin on the corresponding fiber core, and ensure the insulation between the independent fiber cores;

B. Set a first heat-shrinkable tube around the periphery of the initially formed intermediate joint to ensure that both ends of the first heat-shrinkable tube cover the outer sheath on the corresponding cable;

C. Heating the first heat-shrinkable tube, so that the heat-shrinkable tube is closely attached to the intermediate joint;

D. Wrapping a high-pressure rubber self-adhesive tape at the interface between the two ends of the first heat-shrinkable tube and the corresponding cable to form a seal at each interface;

E. A second heat-shrinkable tube is sheathed on the first heat-shrinkable tube. The length of the second heat-shrinkable tube is longer than the length of the first heat-shrinkable tube, so that the second heat-shrinkable tube The two ends respectively exceed the two ends of the first heat-shrinkable tube;

F. Heating the second heat-shrinkable tube so that the heat-shrinkable tube and the intermediate joint are closely attached.

In the step A, the outer side of the intermediate joint composed of the connected fiber cores and insulating layers is half-wrapped with insulating tape, and the two ends of the insulating tape cover the outer sheaths of the corresponding cables respectively. Form the middle joint.

In the step A, from one end of the intermediate joint to the other end of the intermediate joint, the high-pressure rubber self-adhesive tape is continuously wound in a half-lap manner to ensure that the two ends of the high-pressure rubber self-adhesive tape respectively exceed the two ends of the intermediate joint.

There are shielded wires in the cable, and in the step A, an insulating tape is also wrapped on the connected shielding layer.

The way of wrapping the high-pressure rubber self-adhesive tape in step D is: from the interface between one end of the first heat-shrinkable tube and the intermediate joint to the interface between the other end of the first heat-shrinkable tube and the intermediate joint Type continuous winding, ensuring high rubber self-adhesive tape beyond the two ends of the first heat-shrinkable tube.

In step A, before the fiber cores on the cable are connected, the first and second heat-shrinkable sleeves are pre-fitted on the cable.

The beneficial effects of the present invention are: in the manufacturing method of the cable intermediate joint of the present invention, a first heat-shrinkable tube is sleeved on the outside of the intermediate joint, and the first heat-shrinkable tube is wrapped around the interface between the first heat-shrinkable tube and the corresponding cable. Wrap high-pressure rubber self-adhesive tape to ensure the sealing of each interface, and then install a second heat-shrinkable tube on the outside of the first heat-shrinkable tube. Both ends of the second heat-shrinkable tube are covered beyond the corresponding first heat-shrinkable tube. High-pressure rubber self-adhesive tapes at both ends of the shrink tube; compared with the prior art, the waterproof and moisture-proof performance of the intermediate joint formed by the method of the present invention is better.

Description of drawings

Fig. 1 is a flow chart of a specific embodiment of a manufacturing method of a cable intermediate joint according to the present invention.

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

A specific embodiment of a method for manufacturing a cable intermediate joint of the present invention, as shown in Figure 1, a method for manufacturing a cable moisture-proof intermediate joint, this example is based on a YPY type φ8mm, 2*0.2mm cable, the specific method Include the following steps:

1. Clean the cables, judge the stripping length of the two connectors according to the actual situation and strip them off (too long is a waste of material, too short is not easy to connect), the stripping length of the two cables here is about 30mm , to facilitate joint operation;

2. Analog cables usually contain a shielding layer. Use a wire stripper to strip the insulation layer and the inner shielding layer of the two cables.

3. Use wire strippers to peel off the cores of the two cables that need to be connected, and determine the stripped length according to actual requirements. The shielded wires on the core and the shielding layer are twisted into one strand respectively;

3.1. According to the thickness of the cables and related technical requirements, put inner and outer heat-shrinkable tubes with different diameters and lengths on one of the cables. The diameter of the inner heat-shrinkable tube is φ10mm, and the length is 7cm. The diameter of the heat shrinkable tube is φ12mm and the length is 11cm;

4. According to the actual needs and requirements, the fiber cores to be connected should be twisted together into one strand, then bent back, and combined with the corresponding original wires to ensure the contact area of each fiber core. The shielding layer should also follow this method connection handling;

5. Wrap 1 to 2 layers of insulating tape on each connected fiber core and insulation wire, so that each fiber core is isolated and insulated from each other;

5.1. Wrap the connected fiber cores in the previous step with 1 to 2 layers of insulating tape to initially form an intermediate joint and ensure that the intermediate joint forms insulation to the outside world;

5.2. With the help of 10# high-pressure rubber self-adhesive tape (19mm×5yd×0.8mm), forcefully wrap the connected cable joints from one end to the other half-lapped for 1 to 2 layers, each layer should be wrapped beyond the previous step The outer edge of the insulating tape, just observe that the joint is full and dense;

6. With the help of the smaller inner heat-shrinkable tube in step 3.1, wrap it beyond the length of the high-pressure rubber self-adhesive tape in the previous step;

6.1. Then, according to the actual conditions on site, use a heat gun or a windproof lighter to heat and shrink the heat-shrinkable tube, so that the heat-shrinkable tube tightly wraps the high-pressure rubber self-adhesive tape in the previous step;

7. With the help of 10# high-pressure rubber self-adhesive tape (19mm×5yd×0.8mm), forcefully wrap the connected cable joints from one end to the other in a half-lap style for 1 to 2 layers, and each layer must be wrapped beyond the previous step At the interface between the heat-shrinkable tube and the corresponding cable, the high-pressure self-adhesive tape is closely attached to the inner heat-shrinkable tube to ensure the sealing of each interface;

8. With the help of the larger-diameter outer heat-shrinkable tube in step 3.1, wrap it beyond the length of the high-pressure rubber self-adhesive tape in the previous step;

9. According to the site conditions, use a heat gun or a windproof lighter to heat and shrink the heat-shrinkable tube, so that the heat-shrinkable tube tightly wraps the upper layer of high-pressure rubber self-adhesive tape; for the sake of appearance, the outer heat-shrinkable tube can be selected as a line The color of the outer sheath of the cable is the same or similar.

In other embodiments of the manufacturing method of a cable intermediate joint of the present invention, the wrapping method of the high-pressure rubber self-adhesive tape in step 7 can also be changed to: only at the interface between the heat-shrinkable tube and each cable Wrapping is enough, and the middle part of the heat shrinkable tube does not need to be wrapped.

In other embodiments of the manufacturing method of a cable intermediate joint of the present invention, steps 5.1 and 5.2 can also be skipped, only for the waterproof and moisture-proof performance of the intermediate joint, the insulating tape and high voltage in steps 5.1 and 5.2 The rubber self-adhesive tape can also not be provided.

In other embodiments of the manufacturing method of a cable intermediate joint of the present invention, in step 5, the insulating tape may not be wrapped on the insulating wire.

In other embodiments of the manufacturing method of a cable intermediate joint of the present invention, step 3.1 can also be skipped. According to the actual situation, for example, both ends of one of the cables are disconnected, and the heat shrinkable tube can be removed from the One end of the cable is threaded to the middle joint.

In other embodiments of the manufacturing method of a cable intermediate joint of the present invention, it is also possible to reapply the outer side of the second layer of heat-shrinkable tube according to actual needs, such as some occasions that require high waterproof and moisture-proof performance of the intermediate joint. One or more layers of heat-shrinkable tubes are set in sequence, the length of each layer of heat-shrinkable tubes is greater than the length of the previous layer of heat-shrinkable tubes, and the gap between the first heat-shrinkable tube and the outermost heat-shrinkable tube of the intermediate joint is respectively Heat the heat-shrinkable tube, and then wrap a high-pressure rubber self-adhesive tape at the interface between this layer and the corresponding cable to ensure the sealing of each interface, and finally heat the outermost heat-shrinkable tube.

Claims (6)

1. A method for making a cable intermediate joint, comprising a cable, characterized in that: comprising the following steps: A. Wrap each connected fiber core with insulating tape half-lap, so that the two ends of the insulating tape cover the insulation skin on the corresponding fiber core, and ensure the insulation between the independent fiber cores; B. Set a first heat-shrinkable tube around the periphery of the initially formed intermediate joint to ensure that both ends of the first heat-shrinkable tube cover the outer sheath on the corresponding cable; C. Heating the first heat-shrinkable tube, so that the heat-shrinkable tube is closely attached to the intermediate joint; D. Wrapping a high-pressure rubber self-adhesive tape at the interface between the two ends of the first heat-shrinkable tube and the corresponding cable to form a seal at each interface; E. A second heat-shrinkable tube is sheathed on the first heat-shrinkable tube. The length of the second heat-shrinkable tube is longer than the length of the first heat-shrinkable tube, so that the second heat-shrinkable tube The two ends respectively exceed the two ends of the first heat-shrinkable tube; F. Heating the second heat-shrinkable tube so that the heat-shrinkable tube and the intermediate joint are closely attached. 2. The manufacturing method of a cable intermediate joint according to claim 1, characterized in that: in the step A, the outer half lap of the intermediate joint formed by the connected fiber cores and insulating layers is wound Insulating tape is wrapped, and the two ends of the insulating tape cover the outer sheaths of the corresponding cables respectively, and the intermediate joint is initially formed. 3. The manufacturing method of a cable intermediate joint according to claim 2, characterized in that: in the step A, from one end of the intermediate joint to the other end of the intermediate joint, the high-pressure rubber is continuously wound in a half lap The self-adhesive tape ensures that the two ends of the high-pressure rubber self-adhesive tape respectively exceed the two ends of the intermediate joint. 4. The manufacturing method of a cable intermediate joint according to claim 1, characterized in that: there are shielded wires in the cable, and in the step A, the connected shielding layer is also wrapped for insulation adhesive tape. 5. The manufacturing method of a cable intermediate joint according to claim 1, characterized in that: the way of wrapping the high-pressure rubber self-adhesive tape in step D is: from one end of the first heat-shrinkable tube to the middle From the interface of the joint to the other end of the first heat-shrinkable tube and the interface of the intermediate joint, the half-lap continuous winding ensures that the high rubber self-adhesive tape exceeds both ends of the first heat-shrinkable tube. 6. The manufacturing method of a cable intermediate joint according to claim 1, characterized in that: in step A, before the fiber cores on the cable are connected, the first and second heat-shrinkable sleeves The tube is pre-fitted on the cable.