A cold shrink cable outdoor terminal and a cold shrink cable installation method based on the same

Abstract

This invention discloses an outdoor terminal for cold-shrink cables, comprising a cold-shrink tube and evenly spaced skirts disposed on the outside of the cold-shrink tube. A support assembly for installing the cold-shrink cable is installed inside the cold-shrink tube, and creepage zones are formed between adjacent skirts. Each skirt has fin-shaped films on its upper and lower surfaces. The fin-shaped films on the upper surfaces of the skirts extend upwards along the outer wall of the cold-shrink tube from the bottom of the skirt, while the fin-shaped films on the lower surfaces extend downwards along the outer wall of the cold-shrink tube. The vertically positioned fin-shaped films on the skirts of the cold-shrink tube allow the skirts to sway even in light winds, effectively removing dirt from the skirts.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically relating to an outdoor cold-shrink cable terminal and a method for installing cold-shrink cables based on the outdoor terminal. Background Technology

[0002] In the prior art, the technical structure of outdoor cold-shrink cable terminals, such as the "a type of cold-shrink outdoor terminal tube" disclosed in authorization announcement number CN 212784724U, requires mechanical equipment to expand the interior of the cold-shrink tube after its manufacture. Then, a support tube with a larger outer diameter is placed inside the cold-shrink tube to expand its size. The cold-shrink tube is usually made of rubber, which has strong elasticity. After expansion by the support tube, the cold-shrink cable is placed inside the support tube. Then, the support tube is disassembled, and the cold-shrink tube tightly wraps the cold-shrink cable under the action of elasticity, thus achieving installation.

[0003] The existing technical solutions usually have certain drawbacks. On the one hand, the rubber cold shrink tubing is always supported and expanded by the internal support tube, and it remains in an expanded state even when it is not in use. The internal support tube is only removed during installation. The long-term expansion will affect the performance of the cold shrink tubing, affecting its sealing, waterproofing and other properties. The structural design is not reasonable enough.

[0004] On the other hand, after the cold shrink cable is installed, the internal support tube needs to be removed. However, the support tube is compressed by the cold shrink tube, making removal difficult and inconvenient. There is no good removal method in the existing technology.

[0005] In addition, from the perspective of the existing outdoor terminal structure, the umbrella skirt on the cold shrink tubing is designed to increase the creepage distance. However, the umbrella skirt is prone to accumulating dirt and causing flashover. Furthermore, cleaning the dirt on the umbrella skirt is not convenient or safe enough.

[0006] To solve the above-mentioned technical problems, it is necessary to develop a reasonably structured and easy-to-use anal canal dilator for anorectal surgery. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing an outdoor cold-shrink cable terminal and a method for installing cold-shrink cables based on this outdoor terminal; the technical solution is as follows:

[0008] An outdoor terminal for a cold-shrink cable includes a cold-shrink tube and uniformly spaced skirts disposed outside the cold-shrink tube. A support assembly for installing the cold-shrink cable is installed inside the cold-shrink tube, and a creepage zone is formed between adjacent skirts. A fin-shaped film is also provided on the upper and lower surfaces of each skirt. The fin-shaped film on the upper surface of the skirt extends upward from the bottom of the skirt along the outer wall of the cold-shrink tube, while the fin-shaped film on the lower surface of the skirt extends downward along the outer wall of the cold-shrink tube.

[0009] Furthermore, both the upper and lower fin-shaped films within the same creepage zone extend to the middle of the creepage zone.

[0010] Furthermore, each creepage zone has two fin-shaped films located on the upper side and two fin-shaped films located on the lower side. The two fin-shaped films on the upper side are located on the same straight line, and the two fin-shaped films on the lower side are also located on the same straight line. The positions of the two fin-shaped films on the upper side and the two fin-shaped films on the lower side are vertically arranged.

[0011] Furthermore, the cold shrink tube, the umbrella skirt, and the fin-shaped film are all made of rubber.

[0012] Furthermore, the support assembly inside the cold shrink tube includes several support units. Each support unit includes four L-shaped support plates of the same size and shape. The four support plates are spliced ​​together to form a square cylindrical support unit. A piston rod is provided on one side wall of each support plate, and a piston cavity is provided on the other side wall of each support plate. When the four support plates are spliced ​​together, the piston rods on adjacent support plates extend into the piston cavities of adjacent support plates, and the piston rods are provided with piston heads of appropriate size in the piston cavities.

[0013] The piston rod drives the piston head to move within the piston chamber, thereby adjusting the distance between two adjacent support plates. This allows the size of the square support unit formed by the four support plates to be adjusted, and the support unit can be expanded or reduced within the cold shrink tube.

[0014] Furthermore, it also includes an external pneumatic mechanism. The piston chambers in the support plate are all connected to air passages embedded in the plate body, and the air passages are connected to air pipes. The air pipes are connected to the pneumatic mechanism. The pneumatic mechanism inflates the piston chambers, thereby pushing the piston head in the piston chambers to move, and then pushing the piston rod to move, thus adjusting the position of the support plate.

[0015] Furthermore, each of the four support plates in each support unit is provided with three evenly spaced piston rods and three corresponding piston chambers, and each piston chamber is connected to the pneumatic mechanism through an air passage provided inside the plate.

[0016] Furthermore, a total of four support units are provided. The support units are arranged from top to bottom inside the cold shrink tube, and two adjacent support units are installed in correspondence through connecting rods. The air passages in the support plates extend into the connecting rods, and the piston chambers in the two adjacent support plates are connected in correspondence through the air passages extending into the connecting rods.

[0017] Furthermore, each support plate has an arc-shaped rounded corner, and the rounded corner also has a vertical row of ball grooves, and each ball groove has a supporting ball. The head of the supporting ball extends out of the ball groove and presses against the outer wall of the cold shrink tube.

[0018] This invention also provides a method for installing cold-shrink cables based on outdoor terminals, comprising the following steps:

[0019] Adjust the distance between adjacent support plates in the support unit to the minimum. At this time, the piston head of the piston rod is inserted to the bottom of the piston chamber. Adjacent support units form a support assembly through connecting rods. Place the support assembly inside the cold shrink tube and connect it to the air pressure mechanism through an air pipe. Air is introduced into the piston chamber in each support plate through the air pressure mechanism. The gas pressure forces the piston head to move in the piston chamber, causing the piston rod to drive the support plate to move. The distance between adjacent support plates increases. The piston rod moves to the maximum limit, and the support assembly expands to the maximum volume. Correspondingly, the inner diameter of the cold shrink tube is expanded accordingly.

[0020] Insert the cold-shrink cable to be installed into the area expanded by the support assembly, and then release the air through the air pressure mechanism to shrink the internal area of ​​the support assembly until the support plate presses against the inner wall of the cold-shrink cable.

[0021] At this point, the external cold shrink tubing is pressed against the corner of the support plate, and the internal cold shrink cable is pressed against the inner wall of the support plate. Both are in line contact. The corner of the support plate is rounded and has support balls. The internal support components can be easily disassembled. After the support components are disassembled, the cold shrink tubing is then pressed against the cold shrink cable.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0023] 1) The umbrella skirt of the cold shrink tube of the present invention is provided with upper and lower fin-shaped films. The fin-shaped films are set perpendicular to the umbrella skirt. Even in the case of low wind force, the umbrella skirt can be shaken by the fin-shaped films, thereby removing dirt from the umbrella skirt.

[0024] 2) The fin-shaped film in this invention can also effectively clean the dirt on the umbrella skirt when it rains, as rainwater flows down along the fin-shaped film and drips onto the umbrella skirt. In contrast, the efficiency of the umbrella skirt 2 without the fin-shaped film 5 in cleaning dirt with rainwater is greatly reduced.

[0025] 3) In this invention, the fin-shaped films above and below the same creepage area are not on the same vertical line, but are arranged in a cross-shaped staggered structure. Therefore, the overall creepage distance is not changed. The creepage distance is not reduced when fin-shaped films 5 are set. Moreover, the fin-shaped films have the function of removing dirt.

[0026] 4) In this invention, the cold shrink cable can be installed through the internally set support component, which can conveniently install the cold shrink cable into the cold shrink tube, and it is not necessary to keep stretching and expanding the cold shrink cable. It is only necessary to put the support component into the cold shrink tube when installing the cold shrink cable, thus maintaining the performance of the cold shrink tube. The structure is reasonably set.

[0027] 5) In this invention, the L-shaped structure of the support plate is used, with rounded corners and ball grooves at the rounded corners. Supporting balls are installed in the ball grooves. The support balls can be used to easily remove the support components from the cold shrink tube. The structure is reasonably designed. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a diagram showing the location of the fin-shaped film in this invention;

[0030] Figure 3 This is a diagram showing the location of the support unit in this invention;

[0031] Figure 4 This is a diagram of the internal structure of the cold shrink tubing of the present invention;

[0032] Figure 5 for Figure 4 AA section diagram;

[0033] Figure 6 This is a diagram showing the location of the ball groove in this invention;

[0034] Among them, there are: cold shrink tubing 1, umbrella skirt 2, cold shrink cable 3, creepage area 4, fin film 5, support unit 101, support plate 102, piston rod 103, piston chamber 104, piston head 105, pneumatic mechanism 106, air passage 107, connecting rod 108, rounding 109, ball groove 110, and support ball 111. Detailed Implementation

[0035] The present invention will be further illustrated below with reference to specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, an outdoor terminal for a cold-shrink cable in this embodiment includes a cold-shrink tube 1 and umbrella skirts 2 evenly spaced outside the cold-shrink tube 1. A support assembly for installing a cold-shrink cable 3 is installed inside the cold-shrink tube 1, and a creepage area 4 is formed between adjacent umbrella skirts 2. A fin-shaped film 5 is also provided on the upper and lower ends of each umbrella skirt 2. The fin-shaped film 5 on the upper end of the umbrella skirt 2 extends upward from the bottom of the umbrella skirt 2 along the outer wall of the cold-shrink tube 1, while the fin-shaped film 5 on the lower end of the umbrella skirt 2 extends downward along the outer wall of the cold-shrink tube 1.

[0038] Furthermore, both the upper and lower fin-shaped films 5 within the same creepage zone 4 extend to the middle position of the creepage zone 4.

[0039] like Figure 3 As shown, each creepage zone 4 has two fin-shaped films 5 located on the upper side and two fin-shaped films 5 located on the lower side. The two fin-shaped films 5 on the upper side are located on the same straight line, and the two fin-shaped films 5 on the lower side are also located on the same straight line. The positions of the two fin-shaped films 5 on the upper side and the two fin-shaped films 5 on the lower side are vertically arranged. In this embodiment, the cold shrink tube 1, the umbrella skirt 2, and the fin-shaped films 5 are all made of rubber.

[0040] like Figure 4 As shown, the support assembly inside the cold shrink tubing 1 in this embodiment includes several support units 101. Each support unit 101 includes four L-shaped support plates 102 of the same size and shape. The four support plates 102 are spliced ​​together to form a square cylindrical support unit 101. A piston rod 103 is provided on one side wall of each support plate 102, and a piston cavity 104 is provided on the other side wall of each support plate 102. When the four support plates 102 are spliced ​​together, the piston rods 103 on the adjacent support plates 102 extend into the piston cavity 104 of the adjacent support plates 102. The piston rods 103 are provided with piston heads 105 of appropriate size in the piston cavity 104.

[0041] In this embodiment, the piston rod 103 drives the piston head 105 to move in the piston chamber 104, thereby adjusting the distance between two adjacent support plates 102. This allows the size of the square support unit 101 formed by the four support plates 102 to be adjusted, and the support unit 101 can be expanded or reduced within the cold shrink tube 1.

[0042] It also includes an external pneumatic mechanism 106. In this embodiment, the piston chambers 104 in the support plate 102 are all connected to air passages 107 embedded in the plate body. In this embodiment, the air passages 107 are connected to air pipes, which are connected to the pneumatic mechanism 106. The pneumatic mechanism 106 inflates the piston chambers 104, thereby pushing the piston head 105 in the piston chambers 104 to move, and then pushing the piston rod 103 to move, thereby adjusting the position of the support plate 102.

[0043] like Figure 5 As shown, each of the four support plates 102 in each support unit 101 is provided with three evenly spaced piston rods 103 and three corresponding piston chambers 104. Each piston chamber 104 is connected to the pneumatic mechanism 106 through an air passage 107 provided inside the plate.

[0044] In this embodiment, four support units 101 are provided. The support units 101 are arranged from top to bottom inside the cold shrink tube 1, and two adjacent support units 101 are installed in a corresponding manner through a connecting rod 108. The air passage 107 in the support plate 102 extends into the connecting rod 108, and the piston chambers 104 in the two adjacent support plates 102 are connected in a corresponding manner through the air passage 107 extending into the connecting rod 108.

[0045] like Figure 6 As shown, each support plate 102 has an arc-shaped chamfer 109 at its corner, and in this embodiment, the chamfer 109 is also provided with a vertical row of ball grooves 110, and each ball groove 110 is provided with a support ball 111. In this embodiment, the head of the support ball 111 extends out of the ball groove 110, and the support ball 111 presses against the outer wall of the cold shrink tube 1.

[0046] Example 2

[0047] The technical solution of this embodiment is based on the technical structure of Embodiment 1, and provides an installation method for the cold-shrink cable 3 of the outdoor terminal based on Embodiment 1. Firstly, in this embodiment, the technical structure of the external umbrella skirt 2 of the cold-shrink tube 1 is basically the same as in the prior art. The umbrella skirt 2 increases the creepage distance and prevents discharge breakdown. However, the umbrella skirt 2 structure in the prior art is very prone to dirt accumulation, forming flashover. In this embodiment, fin-shaped films 5 are provided at the upper and lower ends of each umbrella skirt 2, such as... Figure 2 As shown, the fin-shaped film 5 is shaped like a fish fin and is relatively thin. Two fin-shaped films 5 are correspondingly provided at the upper and lower ends of the umbrella skirt 2. The two fin-shaped films 5 in the same creepage region 4 are on the same straight line, while the fin-shaped films 5 of two adjacent creepage regions 4 are in a cross-shaped perpendicular relationship, as shown. Figure 3As shown, both the upper and lower fin-shaped films 5 extend to the middle of the creepage zone 4, with consistent vertical height. The fin-shaped films 5 serve two purposes: firstly, since the umbrella skirt 2 is connected to the fin-shaped films 5, and the films 5 are vertically mounted on the umbrella skirt 2, even in light winds, the fin-shaped films 5 can cause the umbrella skirt 2 to sway, thus removing dirt from it. Secondly, in rainy weather, rainwater flows down the fin-shaped films 5 and drips onto the umbrella skirt 2, effectively cleaning dirt. Without the fin-shaped films 5, the efficiency of rainwater in cleaning the umbrella skirt 2 would be significantly reduced. Importantly, in this structural design, the upper and lower fin-shaped films 5 within the same creepage zone 4 are not on the same vertical line, but rather in a staggered, cross-shaped structure. Therefore, the overall creepage distance remains unchanged; the creepage distance is not reduced by the fin-shaped films 5, and the fin-shaped films 5 still function as dirt removers.

[0048] The technical solution of this embodiment also includes a support assembly for installing the internal cold shrink cable 3. In the prior art, the process of installing the cold shrink cable 3 into the cold shrink tube 1 is to use mechanical equipment to open the cold shrink tube 1 after it is formed, and then insert a support tube with an outer diameter larger than the inner diameter of the cold shrink tube 1. The support tube is used to open and place the cold shrink tube 1. When in use, the cold shrink cable 3 is directly passed through the support tube, and then the support tube is pulled out. However, the technical solution of this embodiment completes the installation of the cold shrink tube 1 through the support assembly set inside the cold shrink tube 1.

[0049] like Figure 3 and Figure 4 As shown, in this embodiment, the support assembly inside the cold shrink tubing 1 is achieved by a plurality of support units 101. Each support unit 101 is connected to the others by connecting rods 108 to form an integral cold shrink structure. Each support unit 101 includes four L-shaped support plates 102, as shown in the specific structure. Figure 5 As shown, each support plate 102 has three piston chambers 104 inside, and three piston rods 103 are provided on the side wall of the corresponding support plate 102. The end of the piston rod 103 is provided with a piston head 105. In the specific installation, the piston rods 103 of adjacent support plates 102 are installed into the corresponding piston chambers 104, and the piston head 105 is used to move them, so that the expansion and contraction of the support unit 101 can be realized. The size of the piston head 105 is adapted to the size of the piston chamber 104. Therefore, when gas enters the piston chamber 104, the piston head 105 can be pushed forward to realize the movement of the piston rod 103 and realize the expansion of the two support plates 102.

[0050] In this embodiment, a pneumatic mechanism 106 is provided. An air passage 107, corresponding to and communicating with the piston chamber 104, is provided within the support plate 102. The pneumatic mechanism 106 can then be connected to the piston chamber 104 within each support plate 102 via the air passage 107. Since adjacent support plates 102 are connected via connecting rods 108, air passages 107 can be provided within the connecting rods 108, thus connecting the piston chambers 104 within adjacent support plates 102. Multiple pneumatic mechanisms 106 can be provided in this embodiment, specifically four. One pneumatic mechanism 106 can be configured on each row of support plates 102, or one can be configured on each row, connected via air passages 107 or pipes. The structural design should be easily understood by those skilled in the art.

[0051] In this embodiment, gas can be introduced into the piston chamber 104 through the pneumatic mechanism 106, thereby causing the piston rod 103 to move within the piston chamber 104, which in turn causes the two adjacent support plates 102 to be correspondingly opened, thereby opening the entire cold shrink tube 1 accordingly. The internal dimensions after opening can be just right to fit the cold shrink cable 3, thus completing the installation of the cold shrink cable 3. Furthermore, it is necessary to remove the support assembly from the inside of the cold shrink tube 1 later. In the technical solution of this embodiment, firstly, a rounded corner 109 is provided at the corner of the support plate 102. The rounded corner 109 has a smooth transition and can prevent damage to the inner wall of the tube when opening the cold shrink tube 1. In addition, a ball groove 110 and a support ball 111 can be provided at the rounded corner 109. When removing the support assembly later, the internal support assembly can be easily disassembled by using the rolling of the support ball 111.

[0052] The specific installation method of the cold shrink cable in this embodiment is as follows: Adjust the distance between adjacent support plates 102 in the support unit 101 to the minimum. At this time, the piston head 105 of the piston rod 103 is inserted into the bottom of the piston chamber 104. The adjacent support units 101 form a support assembly through the connecting rod 108. Place the support assembly in the cold shrink tube 1. Connect the air pressure mechanism 106 through the air pipe. The air pressure mechanism 106 introduces air into the piston chamber 104 in each support plate 102. The gas pressure forces the piston head 105 to move in the piston chamber 104, so that the piston rod 103 drives the support plate 102 to move. The distance between adjacent support plates 102 increases. The piston rod 103 moves to the maximum limit. The support assembly expands to the maximum volume. Correspondingly, the inner diameter of the cold shrink tube 1 is expanded accordingly.

[0053] Place the cold shrink cable 3 to be installed into the area expanded by the support assembly, and then release the air through the air pressure mechanism 106 to shrink the internal area of ​​the support assembly until the support plate 102 presses against the inner wall of the cold shrink cable 3.

[0054] At this time, the external cold shrink tube 1 is pressed against the corner of the support plate 102, and the internal cold shrink cable 3 is pressed against the inner wall of the support plate 102. Both are in line contact. The corner of the support plate 102 is provided with a rounded 109 and a support ball 111. The internal support assembly can be easily disassembled. After the support assembly is disassembled, the cold shrink tube 1 is then pressed tightly onto the cold shrink cable 3.

[0055] The above embodiments are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An outdoor terminal for a cold-shrink cable, characterized in that: The device includes a cold shrink tube (1) and uniformly spaced umbrella skirts (2) on the outside of the cold shrink tube (1). A support assembly for installing a cold shrink cable (3) is installed inside the cold shrink tube (1), and a creepage area (4) is formed between adjacent umbrella skirts (2). A fin-shaped film (5) is also provided on the upper and lower ends of each umbrella skirt (2). The fin-shaped film (5) on the upper end of the umbrella skirt (2) extends upward from the bottom of the umbrella skirt (2) along the outer wall of the cold shrink tube (1), while the fin-shaped film (5) on the lower end of the umbrella skirt (2) extends downward along the outer wall of the cold shrink tube (1). Furthermore, both the upper and lower fin-shaped membranes (5) within the same creepage zone (4) extend to the middle position of the creepage zone (4).

2. The outdoor terminal for a cold-shrink cable according to claim 1, characterized in that: In each creepage zone (4), there are two fin-shaped films (5) located on the upper side and two fin-shaped films (5) located on the lower side. The two fin-shaped films (5) on the upper side are located on the same straight line, and the two fin-shaped films (5) on the lower side are also located on the same straight line. The positions of the two fin-shaped films (5) on the upper side and the two fin-shaped films (5) on the lower side are vertically arranged.

3. The outdoor terminal for a cold-shrink cable according to claim 1, characterized in that: The cold shrink tube (1), the umbrella skirt (2), and the fin film (5) are all made of rubber.

4. The outdoor terminal for a cold-shrink cable according to claim 1, characterized in that: The support assembly inside the cold shrink tube (1) includes several support units (101). Each support unit (101) includes four L-shaped support plates (102) of the same size and shape. The four support plates (102) are spliced ​​together to form a square cylindrical support unit (101). A piston rod (103) is provided on one side wall of each support plate (102), and a piston cavity (104) is provided on the other side wall of each support plate (102). When the four support plates (102) are spliced ​​together, the piston rod (103) on the adjacent support plate (102) extends into the piston cavity (104) of the adjacent support plate (102). The piston rod (103) is provided with a piston head (105) of the appropriate size in the piston cavity (104). The piston rod (103) drives the piston head (105) to move in the piston chamber (104), thereby adjusting the distance between two adjacent support plates (102), so that the size of the square support unit (101) formed by the four support plates (102) can be adjusted, and the support unit (101) can be expanded or reduced in the cold shrink tube (1).

5. The outdoor terminal for a cold-shrink cable according to claim 4, characterized in that: It also includes an external pneumatic mechanism (106). The piston chambers (104) in the support plate (102) are all connected to air passages (107) embedded in the plate body. The air passages (107) are connected to air pipes, which are connected to the pneumatic mechanism (106). The pneumatic mechanism (106) pressurizes the piston chambers (104) with air, thereby pushing the piston head (105) in the piston chambers (104) to move, and then pushing the piston rod (103) to move, thereby adjusting the position of the support plate (102).

6. The outdoor terminal for a cold-shrink cable according to claim 4, characterized in that: Each support unit (101) has three evenly spaced piston rods (103) and three corresponding piston chambers (104) on four support plates (102). Each piston chamber (104) is connected to the pneumatic mechanism (106) through an air passage (107) inside the plate.

7. The outdoor terminal for a cold-shrink cable according to claim 6, characterized in that: There are four support units (101). The support units (101) are arranged from top to bottom inside the cold shrink tube (1). Two adjacent support units (101) are installed in a corresponding manner through a connecting rod (108). The air passage (107) in the support plate (102) extends into the connecting rod (108). The piston chambers (104) in the two adjacent support plates (102) are connected in a corresponding manner through the air passage (107) extending into the connecting rod (108).

8. An outdoor cold-shrink cable terminal according to claim 6, characterized in that: Each support plate (102) has an arc-shaped chamfer (109) at its corner, and a vertical row of ball grooves (110) is provided at the chamfer (109). Each ball groove (110) is provided with a support ball (111), the head of which extends out from the ball groove (110) and the support ball (111) presses against the outer wall of the cold shrink tube (1).

9. A method for installing a cold-shrink cable based on the outdoor terminal described in claim 8, characterized in that: Includes the following steps: Adjust the distance between adjacent support plates (102) in the support unit (101) to the minimum. At this time, the piston head (105) of the piston rod (103) is inserted into the bottom of the piston chamber (104). The adjacent support units (101) form a support assembly through the connecting rod (108). Place the support assembly in the cold shrink tube (1) and connect it to the air pressure mechanism (106) through the air pipe. The air pressure mechanism (106) introduces air into the piston chamber (104) in each support plate (102). The gas pressure forces the piston head (105) to move in the piston chamber (104), so that the piston rod (103) drives the support plate (102) to move. The distance between adjacent support plates (102) increases. The piston rod (103) moves to the maximum limit. The support assembly expands to the maximum volume. Correspondingly, the inner diameter of the cold shrink tube (1) is expanded accordingly. The cold shrink cable (3) to be installed is placed into the area expanded by the support assembly, and then the air is released by the air pressure mechanism (106) to shrink the internal area of ​​the support assembly until the support plate (102) presses against the inner wall of the cold shrink cable (3); At this time, the external cold shrink tube (1) is pressed against the corner of the support plate (102), and the internal cold shrink cable (3) is pressed against the inner wall of the support plate (102). Both are in line contact. The corner of the support plate (102) is provided with rounded (109) and support ball (111). The internal support assembly is easily disassembled. After the support assembly is disassembled, the cold shrink tube (1) is then pressed against the cold shrink cable (3).

Images