Cable cold shrinkage terminal

Abstract

The utility model relates to a cable cold shrinkage terminal. The technical problem to be solved by the utility model is to provide a cable cold shrinkage terminal which is good in sealing performance and larger in creepage distance. According to the technical scheme, the cable connector comprises an insulating tube, a stress cone, a supporting strip and a sealing ring, a cable penetrating hole and a stress cone mounting groove are formed in the insulating tube, the supporting strip is arranged on the inner wall of the cable penetrating hole, a clamping tooth set and a sealing ring mounting groove are further arranged at the positions, at the two ends of the stress cone mounting groove, in the insulating tube, and the sealing ring is arranged in the clamping tooth set. The latch group comprises large latches and small latches, and the sections of the large latches and the small latches are of triangular structures; and the outer wall of the insulating tube is provided with an insulating tube large umbrella skirt and an insulating tube small umbrella skirt at intervals below the stress cone. The cable cold shrinkage terminal has the advantages that the clamping force to the cable can be kept in the long-time stretching process through the design of the clamping tooth set, the cable cold shrinkage terminal is firmly and tightly attached to the cable, and the sealing ring further strengthens the internal sealing waterproof performance.

Description

Technical Field

[0001] The utility model relates to a power cable connection accessory, in particular to a cable cold shrink terminal. Background Art

[0002] Cable cold shrink terminal is a device used to connect and terminate cables, usually used to protect and terminate cables in power systems. Cold shrink cable terminal head is made of elastomeric material injection vulcanized in the factory, and then expanded and lined with plastic spiral supports to form various cable accessories. It relies on elastic retraction force at room temperature, rather than heat shrink cable accessories that need to be heated and shrunk by fire, so it is commonly known as cold shrink cable accessories. In actual use, it is found that the existing cold shrink cable terminal head is prone to fatigue during long-term stretching, resulting in reduced fit with the cable, poor sealing, reduced product life and safety hazards. In addition, in outdoor rainy weather, although the umbrella skirt structure of the cable cold shrink terminal can drain water, the drainage effect is general, and the creepage distance cannot be effectively increased. In view of the above problems, it is necessary to further improve the existing products. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a cable cold shrink terminal with good sealing performance and larger creepage distance.

[0004] The technical solution adopted by the utility model cable cold shrink terminal: includes an insulating tube, a stress cone and a support strip, characterized in that it also includes a sealing ring, the insulating tube is provided with a cable passing hole and a stress cone installation groove for installing the stress cone, the support strip is arranged at the inner wall of the cable passing hole, the insulating tube is also provided with a tooth group arranged at intervals and used to strengthen the cable clamping and a sealing ring installation groove for installing the sealing ring at both ends of the stress cone installation groove, the tooth group includes a large tooth and a small tooth, and the cross-sections of the large tooth and the small tooth are both triangular structures;

[0005] The outer wall of the insulating tube is provided with a large insulating tube shed and a small insulating tube shed at intervals below the stress cone. The large insulating tube shed and the small insulating tube shed are both provided with water channels, and water holes are provided at intervals around arcs in the water channels.

[0006] The sealing ring is arranged on the outside of the latch tooth group.

[0007] The tooth height of the large latch tooth is 1 mm, and the tooth height of the small latch tooth is 0.6 mm.

[0008] The ports at both ends of the insulating tube are also provided with reinforcement rings, which can play a good elastic sealing effect. The insulating tube, the reinforcement ring, the large umbrella skirt of the insulating tube and the small umbrella skirt of the insulating tube are integrally injection-molded, which can greatly improve the insulation performance of the product.

[0009] The large shed of the insulating tube and the small shed of the insulating tube are both provided with a water guiding slope at the water channel for facilitating the introduction of water.

[0010] The support bar is spirally arranged on the inner wall of the cable passing hole.

[0011] The insulating tube is made of silicone rubber, and the sealing ring is made of rubber.

[0012] The advantages of the cable cold shrink terminal of the utility model are: the design of the tooth group can maintain the clamping force on the cable during a long period of stretching, the fit with the cable is firm and tight, and the sealing ring further enhances the internal sealing and waterproofing; the water trough and water hole structure of the umbrella skirt can accelerate the rapid flow of rainwater dripping on the umbrella skirt, the insulation capacity is better, and the creepage distance is effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a cross-sectional view of the cable cold shrink terminal of the utility model;

[0015] Figure 2 It is a cross-sectional view of the insulating tube of the utility model;

[0016] Figure 3 yes Figure 2 A magnified image of

[0017] Figure 4 It is a structural schematic diagram of the insulating tube of the utility model. DETAILED DESCRIPTION

[0018] like Figure 1-4 As shown, the cable cold shrink terminal involved in the utility model includes an insulating tube 1, a stress cone 2 and a support bar 3, and a sealing ring 4. The insulating tube 1 is provided with a cable passing hole 6 and a stress cone mounting groove 7 for installing the stress cone 2. The support bar 3 is arranged at the inner wall of the cable passing hole 6. The insulating tube 1 is also provided with a tooth group 8 arranged at intervals and used to strengthen the cable clamping at both ends of the stress cone mounting groove 7 and a sealing ring mounting groove 9 for installing the sealing ring 4. The tooth group 8 includes a large tooth 11 and a small tooth 12. The cross-sections of the large tooth 11 and the small tooth 12 are both triangular structures. The tooth group 8 can fasten the cable insulation layer, so that the clamping force on the cable is maintained during a long period of stretching, and the fit with the cable is firm and tight. The sealing ring 4 further strengthens the internal sealing and waterproof properties.

[0019] The outer wall of the insulating tube 1 is provided with a large insulating tube shed 14 and a small insulating tube shed 15 at intervals below the stress cone 2. The large insulating tube shed 14 and the small insulating tube shed 15 are both provided with a water trough 17. The water trough 17 is provided with water holes 18 at intervals around arcs. The structure of the water trough 17 and the water holes 18 can accelerate the rapid flow of rainwater dripping on the shed, so that the insulation capacity is better and the creepage distance is effectively guaranteed.

[0020] The sealing ring 4 is arranged outside the latch tooth group 8, so that the sealing performance is better and the safety is higher.

[0021] The tooth height of the large latching teeth 11 is 1 mm, and the tooth height of the small latching teeth 12 is 0.6 mm, which effectively enhances the gripping force without damaging the wire.

[0022] The two end ports of the insulating tube 1 are further provided with reinforcement rings 20 , and the insulating tube 1 , the reinforcement ring 20 , the insulating tube large shed 14 and the insulating tube small shed 15 are integrally formed by injection molding.

[0023] The insulating tube large shed 14 and the insulating tube small shed 15 are both provided with a water guiding slope 19 at the water channel 17 for facilitating the introduction of water and preventing water from being retained.

[0024] The support bar 3 is placed in a spiral shape on the inner wall of the cable insertion hole 6 to facilitate subsequent extraction.

[0025] The insulating tube 1 is made of silicone rubber, and the sealing ring 4 is made of rubber.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A cable cold shrink terminal, comprising an insulating tube (1), a stress cone (2) and a support bar (3), characterized in that: It also comprises a sealing ring (4), the insulating tube (1) is provided with a cable insertion hole (6) and a stress cone installation groove (7) for installing the stress cone (2), the support bar (3) is arranged on the inner wall of the cable insertion hole (6), and the insulating tube (1) is provided with a tooth group (8) for strengthening the cable clamping and a sealing ring installation groove (9) for installing the sealing ring (4) at both ends of the stress cone installation groove (7), the tooth group (8) comprises a large tooth (11) and a small tooth (12), and the cross-sections of the large tooth (11) and the small tooth (12) are both triangular structures; The outer wall of the insulating tube (1) is provided with a large insulating tube shed (14) and a small insulating tube shed (15) at intervals below the stress cone (2); the large insulating tube shed (14) and the small insulating tube shed (15) are both provided with water channels (17); and water holes (18) are provided at intervals around a circular arc in the water channels (17).

2. The cable cold shrink terminal according to claim 1, characterized in that: The sealing ring (4) is arranged outside the latch tooth group (8).

3. The cable cold shrink terminal according to claim 1, characterized in that: The tooth height of the large latching teeth (11) is 1 mm, and the tooth height of the small latching teeth (12) is 0.6 mm.

4. The cable cold shrink terminal according to claim 1, characterized in that: The insulating tube (1) is also provided with reinforcement rings (20) at both end ports, and the insulating tube (1), the reinforcement ring (20), the insulating tube large shed (14) and the insulating tube small shed (15) are integrally formed by injection molding.

5. The cable cold shrink terminal according to claim 1, characterized in that: The insulating tube large shed (14) and the insulating tube small shed (15) are both provided with a water guiding slope (19) at the water channel (17) for facilitating the introduction of water.

6. The cable cold shrink terminal according to claim 1, characterized in that: The support bar (3) is placed in a spiral shape on the inner wall of the cable insertion hole (6).

7. The cable cold shrink terminal according to claim 1, characterized in that: The insulating tube (1) is made of silicone rubber, and the sealing ring (4) is made of rubber.

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