Prefabricated cable accessory mounting assembly

Abstract

The utility model discloses a prefabricated cable accessory installation assembly, relates to the field of cable accessories, and aims to solve the problems that an oil separation insulation tube in the prior art does not have a telescopic function, and the exposed lengths of three wire cores are different under different connection conditions, so that the oil separation insulation tube needs to be replaced or cut. The upper end of the cable body is connected with a first connecting column, the upper end of the first connecting column is connected with a second connecting column, the upper end of the second connecting column is fixedly connected with three insulating heat shrink tubes in an annular array mode, and the middle of each insulating heat shrink tube is provided with a telescopic part. The upper ends of the three cable cores sequentially penetrate through the first connecting column, the second connecting column and the three insulating heat shrink tubes respectively and then are fixedly connected with wiring terminals, the telescopic parts are arranged in the middles of the insulating heat shrink tubes, the length can be flexibly adjusted according to actual installation requirements, the problem that a traditional insulating tube with the fixed length needs to be cut or replaced is solved, and the service life of the cable is prolonged. And the installation efficiency and the applicability are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of cable accessories, specifically a prefabricated cable accessory installation assembly. Background Technology

[0002] Cable accessories are critical components in power systems used to connect, protect, or terminate cables, ensuring the safe and reliable operation of cable networks. They mainly include cable terminations (installed at the end of the cable to achieve electrical connections with other equipment or lines), intermediate joints (used for extending or branching cable sections), and supporting components such as protective sleeves and insulation restoration parts. Their core function is to maintain the electrical insulation, mechanical protection, and sealing of the cable, preventing moisture, dust intrusion, and electromagnetic interference.

[0003] For example, authorization announcement number CN210669501U discloses a 10kV prefabricated cable accessory, including a main cable accessory, three branch cable accessories connected to one end of the main cable accessory, and terminals connected to one end of each of the three branch cable accessories. A sealing tube is fitted to one end of each terminal. Antistatic rubber is adhered to the outer surface of each branch cable accessory. Oil-proof three-core finger sleeves are adhered to the connection points between the three branch cable accessories and the main cable accessory. An oil-proof insulating tube is installed inside each branch cable accessory, and wire cores are installed inside the oil-proof insulating tube. One end of each of the three wire cores extends through a hose clamp into the main cable accessory. This utility model has a reasonable design and high integration. The armor, sealing sleeve, and cable sheath are stacked and wrapped to prevent damage to the internal functional layer during transportation and installation, significantly improving the overall impact resistance of the cable accessory. The cable sheath on the surface provides protection and reduces surface damage. Simultaneously, the entire surface of the cable accessory is covered with antistatic rubber, which has an antistatic effect and reduces external interference.

[0004] However, the oil-insulating tube in the above technology does not have a telescopic function, and the length of the three wire cores that need to be exposed is not the same under different connection conditions, which means that the oil-insulating tube needs to be replaced or cut, making the installation more troublesome; therefore, the market urgently needs to develop a prefabricated cable accessory installation assembly to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a prefabricated cable accessory installation assembly to solve the problem mentioned in the background art that the oil-insulating tube does not have a telescopic function, and the length of the three wire cores that need to be exposed is not the same under different connection conditions, which leads to the need to replace or cut the oil-insulating tube, making the installation more troublesome.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated cable accessory installation assembly, comprising a cable body, wherein three cable cores are arranged in a ring array inside the cable body, a first connecting post is connected to the upper end of the cable body, a second connecting post is connected to the upper end of the first connecting post, and three insulating heat shrink tubes are fixedly connected in a ring array to the upper end of the second connecting post, each of the three insulating heat shrink tubes having a telescopic part in the middle, and the upper ends of the three cable cores respectively passing through the first connecting post, the second connecting post and the three insulating heat shrink tubes and then being fixedly connected to a terminal block.

[0007] Preferably, the lower end face of the first connecting post is provided with an internal thread groove, and the internal thread groove on the first connecting post is rotated and fitted into the upper end of the cable body, and the teeth of the internal thread groove are inserted into the outer wall of the cable body for engagement and fixation.

[0008] Preferably, rectangular anti-reverse strips are fixedly connected to the lower ends of both sides of the outer wall of the first connecting post, and a second insulating heat shrink sleeve is fitted into the lower end of the outer wall of the first connecting post and the upper end of the outer wall of the cable body.

[0009] Preferably, the upper end of the outer wall of the first connecting column is fixedly provided with an external thread, and the lower end of the outer wall of the second connecting column is fixedly connected with a tightening ring.

[0010] Preferably, the tightening ring is rotatably connected to an internally threaded rotating tube, the lower end of which is fitted into the upper end of the outer wall of the first connecting column and threadedly connected and fixed to the externally threaded part.

[0011] Preferably, a backlash ring is fixedly connected to the lower end of the outer wall of the terminal block.

[0012] Preferably, a first insulating heat shrink sleeve is fixedly connected to the upper end of the insulating heat shrink tubing, and the first insulating heat shrink sleeve is fitted into the lower end of the outer wall of the terminal block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting a telescopic part in the middle of the insulating heat shrink tube, the length can be flexibly adjusted according to the actual installation requirements, avoiding the problem of cutting or replacing the traditional fixed length insulating tube, and significantly improving the installation efficiency and applicability.

[0015] (2) In this utility model, a detachable threaded connection structure of the first connecting column and the second connecting column is adopted, which, together with the locking effect of the internal thread rotating tube, realizes quick installation and reliable sealing, and facilitates later maintenance and repair.

[0016] (3) In this utility model, by setting a double heat-shrinkable sealing structure of the first insulating heat-shrinkable sleeve and the second insulating heat-shrinkable sleeve, and with the anti-detachment design of the anti-reverse ring and the rectangular anti-reverse strip, the sealing performance and mechanical stability of the cable accessories are effectively enhanced, and the service life is extended. Attached Figure Description

[0017] Figure 1 This is a front view of a prefabricated cable accessory installation assembly according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the present invention;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Cable body; 101. Cable core; 2. First connecting post; 201. Internal thread groove; 202. External thread part; 203. Rectangular anti-reverse strip; 3. Second connecting post; 301. Tightening ring; 302. Insulating heat shrink tubing; 303. Telescopic part; 304. First insulating heat shrink sleeve; 4. Internal thread rotating tube; 5. Second insulating heat shrink sleeve; 6. Terminal block; 601. Anti-reverse ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a prefabricated cable accessory installation assembly, including a cable body 1. Three cable cores 101 are arranged in a circular array inside the cable body 1. A first connecting post 2 is connected to the upper end of the cable body 1. An internal thread groove 201 is provided on the lower end face of the first connecting post 2. The internal thread groove 201 on the first connecting post 2 is fitted onto the upper end of the cable body 1, and the teeth of the internal thread groove 201 are inserted into the outer wall of the cable body 1 for engagement and fixation, thus fixing the first connecting post 2 to the upper end of the cable body 1 and sealing the upper end of the cable body 1. Rectangular anti-reverse strips 203 are fixedly connected to the lower ends of both sides of the outer wall of the first connecting post 2. A second insulating heat-shrinkable sleeve 5 is fitted onto the lower end of the outer wall of the first connecting post 2 and the upper end of the outer wall of the cable body 1. The second insulating heat-shrinkable sleeve 5 seals the connection between the first connecting post 2 and the cable body 1 by shrinking under heat. Simultaneously, the shrinking of the second insulating heat-shrinkable sleeve 5 covers the two rectangular anti-reverse strips 203, preventing the second insulating heat-shrinkable sleeve 5 from falling downwards during use.

[0024] Please see Figure 2 The upper end of the first connecting post 2 is connected to the second connecting post 3. Three insulating heat shrink tubes 302 are fixedly connected in a circular array to the upper end of the second connecting post 3. Each of the three insulating heat shrink tubes 302 has a telescopic part 303 in its middle. The upper ends of the three cable cores 101 pass sequentially through the first connecting post 2, the second connecting post 3, and the three insulating heat shrink tubes 302, and are then fixedly connected to a terminal block 6. The telescopic parts 303 allow the length of the insulating heat shrink tubes 302 to be adjusted. After the cable core 101 passes through the insulating heat shrink tube 302 and is fixed to the terminal block 6, the length of the insulating heat shrink tube 302 can be adjusted according to the length of the cable core 101. To improve applicability, a backlash ring 601 is fixedly connected to the lower end of the outer wall of the terminal 6, and a first insulating heat shrink tube 304 is fixedly connected to the upper end of the insulating heat shrink tube 302. After adjusting the length of the insulating heat shrink tube 302, the first insulating heat shrink tube 304 is inserted into the lower end of the outer wall of the terminal 6. The insulating heat shrink tube 302 and the first insulating heat shrink tube 304 are simultaneously heated and shrunk to cover and fix the cable core 101 and the lower end of the terminal 6. The shrinkage of the first insulating heat shrink tube 304 covers the backlash ring 601 simultaneously, preventing the first insulating heat shrink tube 304 from falling downwards during use and causing the cable core 101 to be exposed.

[0025] Please see Figure 2 and Figure 4 The upper end of the outer wall of the first connecting column 2 is fixedly provided with an external threaded part 202, and the lower end of the outer wall of the second connecting column 3 is fixedly connected with a tightening ring 301. An internal threaded rotating tube 4 is rotatably connected to the outside of the tightening ring 301. The lower end of the internal threaded rotating tube 4 is fitted into the upper end of the outer wall of the first connecting column 2 and is threadedly connected and fixed with the external threaded part 202. After the internal threaded rotating tube 4 is threadedly connected to the first connecting column 2, the first connecting column 2 and the second connecting column 3 are tightened together, and a sealing ring is set between the first connecting column 2 and the second connecting column 3 for sealing.

[0026] Working principle: In use, firstly, the first connecting post 2 is inserted into the upper end of the cable body 1 through the internal thread groove 201, so that the teeth of the internal thread groove 201 engage and fix it to the outer wall of the cable body 1, achieving initial sealing and fixation. Next, the three cable cores 101 are sequentially passed through the first connecting post 2, the second connecting post 3, and the corresponding insulating heat shrink tubing 302, and crimped and fixed to the terminal block 6. By stretching or compressing the telescopic part 303 in the middle of the insulating heat shrink tubing 302, the length of the tubing can be flexibly adjusted to meet the exposure requirements of different cable cores 101. After adjustment, the first insulating heat shrink tubing 304 is heated with a hot air gun to shrink it, tightly covering the lower end of the terminal block 6 and the anti-slip ring 601, forming an anti-slip seal; at the same time, the second insulating heat shrink tubing 5 is heated to shrink and fix the connection between the first connecting post 2 and the cable body 1, and the rectangular anti-slip strip 203 enhances the anti-slip effect. Finally, rotate the internally threaded rotating tube 4 to lock it with the external thread 202 of the first connecting post 2, and push the tightening ring 301 to press the second connecting post 3 against the first connecting post 2 to form a sealing ring, completing the overall sealing installation. This design, through adjustable insulating heat shrink tubing and a multi-seal structure, significantly improves installation adaptability and protective reliability.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated cable accessory installation assembly, comprising a cable body (1), characterized in that: The cable body (1) has three cable cores (101) arranged in a ring array inside. The upper end of the cable body (1) is connected to a first connecting post (2). The upper end of the first connecting post (2) is connected to a second connecting post (3). The upper end of the second connecting post (3) is fixedly connected to three insulating heat shrink tubes (302) in a ring array. Each of the three insulating heat shrink tubes (302) has a telescopic part (303) in the middle. The upper ends of the three cable cores (101) pass through the first connecting post (2), the second connecting post (3) and the three insulating heat shrink tubes (302) in sequence and are then fixedly connected to a terminal block (6).

2. The prefabricated cable accessory installation assembly according to claim 1, characterized in that: The lower end face of the first connecting post (2) is provided with an internal thread groove (201). The internal thread groove (201) on the first connecting post (2) is rotated into the upper end of the cable body (1) and the teeth of the internal thread groove (201) are inserted into the outer wall of the cable body (1) for engagement and fixation.

3. The prefabricated cable accessory installation assembly according to claim 1, characterized in that: A rectangular anti-reverse strip (203) is fixedly connected to the lower ends of both sides of the outer wall of the first connecting post (2). The lower end of the outer wall of the first connecting post (2) and the upper end of the outer wall of the cable body (1) are fitted together with a second insulating heat shrink sleeve (5).

4. A prefabricated cable accessory installation assembly according to claim 1, characterized in that: The upper end of the outer wall of the first connecting column (2) is fixedly provided with an external thread (202), and the lower end of the outer wall of the second connecting column (3) is fixedly connected with a tightening ring (301).

5. A prefabricated cable accessory installation assembly according to claim 4, characterized in that: The tightening ring (301) is rotatably connected to an internally threaded rotating tube (4). The lower end of the internally threaded rotating tube (4) is fitted into the upper end of the outer wall of the first connecting column (2) and is threadedly connected and fixed to the externally threaded part (202).

6. A prefabricated cable accessory installation assembly according to claim 1, characterized in that: A backstop ring (601) is fixedly connected to the lower end of the outer wall of the terminal block (6).

7. A prefabricated cable accessory installation assembly according to claim 1, characterized in that: The upper end of the insulating heat shrink tube (302) is fixedly connected to the first insulating heat shrink sleeve (304), and the first insulating heat shrink sleeve (304) is inserted into the lower end of the outer wall of the terminal (6).

Images