Cold contraction terminal with good sealing performance

Abstract

The utility model relates to a cold shrink terminal with good sealing performance. The technical problem to be solved by the utility model is to provide a cold shrink terminal with good sealing performance. The technical scheme adopted by the utility model is as follows: the cold-shrink terminal comprises a cold-shrink three-finger sleeve, a cold-shrink insulating tube, a cold-shrink terminal head, a sealing gasket and a tensile pad, the cold-shrink three-finger sleeve is provided with a cable separation sleeve, and the front end of the cold-shrink insulating tube is provided with an insulating tube butt joint part; the thermal contraction terminal head rear end is sleeved outside the insulation tube butt joint part, the thermal contraction insulation tube rear end is sleeved outside the cable separation sleeve, and the inner wall of the thermal contraction terminal head rear end and the inner wall of the thermal contraction insulation tube rear end are respectively provided with a sealing gasket imbedding groove and a tensile pad imbedding groove. The utility model has the advantages that the tensile pad can improve the tensile performance of the joint and prevent looseness and separation, and the sealing pad is matched with the reinforcing clamp spring to improve the connection tightness and sealing performance of the joint and effectively prevent water from entering.

Description

Technical Field

[0001] The utility model relates to a cold shrink terminal with good sealing performance. Background Art

[0002] Cold shrink terminal is an electrical component used in cable connection. It uses elastomeric materials to tightly wrap around the cable through elastic retraction force at room temperature to form a sealed connection point. Generally, 10KV cold shrink terminal includes cold shrink three-finger sleeve, cold shrink insulation tube and cold shrink terminal head. In actual process, it is found that rainwater is very easy to enter the connection between cold shrink three-finger sleeve and cold shrink insulation tube, and the connection between cold shrink insulation tube and cold shrink terminal head. As the service cycle becomes longer, the connection is prone to loosening and the sealing is poor. Improvement and optimization are carried out for this. 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 cold shrink terminal with good sealing performance.

[0004] The technical solution adopted by the utility model of the cold shrink terminal with good sealing performance is: The utility model is characterized in that it comprises a cold shrink three-finger sleeve, a cold shrink insulating tube, a cold shrink terminal head, a sealing pad and a tensile pad, the cold shrink three-finger sleeve is provided with three cable separation sleeves arranged at intervals around a circular arc, the front end of the cold shrink insulating tube is provided with an insulating tube docking portion, the rear end of the cold shrink terminal head is sleeved outside the insulating tube docking portion and the rear end of the cold shrink insulating tube is sleeved outside the cable separation sleeve, a third cable through hole is provided in the cold shrink terminal head, a second cable through hole communicating with the third cable through hole is provided in the cold shrink insulating tube, the rear end inner wall of the cold shrink terminal head and the rear end inner wall of the cold shrink insulating tube are both provided with a sealing pad insertion groove corresponding to the sealing pad and a tensile pad insertion groove corresponding to the tensile pad, the outer wall of the insulating tube docking portion and the outer wall of the cable separation sleeve are both provided with a sealing pad limiting groove and a tensile pad limiting opening arranged at intervals around a circular arc, a tensile pad clamping block clamped on the tensile pad limiting opening is provided in the tensile pad, and sealing pad limiting teeth corresponding to the sealing pad limiting groove are provided in the sealing pad.

[0005] The sealing pad insertion groove is arranged on the outer side of the anti-tension pad insertion groove, and the anti-tension pad limiting opening is arranged on the outer side of the sealing pad limiting groove.

[0006] It also includes a reinforcing retaining spring, and the rear end outer wall of the cold shrink terminal head and the rear end outer wall of the cold shrink insulation tube are both provided with a retaining spring locking groove for locking and limiting the reinforcing retaining spring.

[0007] The rear end outer wall of the cold shrink terminal head and the rear end outer wall of the cold shrink insulation tube are both provided with the retaining spring locking groove at the outer wall of the sealing gasket insertion groove.

[0008] The depth of the sealing gasket limiting groove is 0.5 mm, and the tooth height of the sealing gasket limiting teeth is less than 0.4 mm.

[0009] The cold shrink three-finger sleeve, the cold shrink insulation tube and the cold shrink terminal head are all made of silicone rubber, and the sealing pad and the tensile pad are all made of nitrile rubber.

[0010] The utility model has the advantages that the cold shrink terminal with good sealing performance is that the tensile pad can improve the tensile performance of the connection to prevent loosening and separation, and the sealing pad can cooperate with the reinforcing clip to improve the connection tightness and sealing performance of the connection to effectively prevent water ingress. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] Figure 1 This is an exploded view of the cold shrink terminal with good sealing performance of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the cold shrink three-finger sleeve of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the utility model cold shrink insulation tube;

[0015] Figure 4 It is a structural schematic diagram of the cold shrink terminal head of the utility model;

[0016] Figure 5 It is a structural schematic diagram of the utility model tensile pad;

[0017] Figure 6 It is a structural schematic diagram of the sealing gasket of the utility model. DETAILED DESCRIPTION

[0018] like Figure 1-6As shown, the utility model relates to a cold shrink terminal with good sealing performance, comprising a cold shrink three-finger sleeve 1, a cold shrink insulating tube 2, a cold shrink terminal head 3, a sealing pad 4 and a tensile pad 5, the cold shrink three-finger sleeve 1 is provided with three cable separation sleeves 8 arranged around a circular arc, the front end of the cold shrink insulating tube 2 is provided with an insulating tube docking portion 9, the rear end of the cold shrink terminal head 3 is sleeved outside the insulating tube docking portion 9 and the rear end of the cold shrink insulating tube 2 is sleeved outside the cable separation sleeve 8, the cold shrink terminal head 3 is provided with a third cable through hole 10, the cold shrink insulating tube 2 is provided with a second cable through hole 11 communicating with the third cable through hole 10, the rear end inner wall of the cold shrink terminal head 3 and the rear end inner wall of the cold shrink insulating tube 2 are both provided with sealing pads corresponding to the sealing pad 4. The groove 13 and the tensile pad insertion groove 14 corresponding to the tensile pad 5, the outer wall of the insulating tube docking part 9 and the outer wall of the cable dividing sleeve 8 are both provided with a sealing pad limiting groove 15 and a tensile pad limiting opening 16 arranged around a circular arc, the tensile pad 5 is provided with a tensile pad clamping block 17 clamped on the tensile pad limiting opening 16, and the sealing pad 4 is provided with sealing pad limiting teeth 18 corresponding to the sealing pad limiting groove 15 at intervals, the sealing pad 4 and the tensile pad 5 are placed in an injection mold and vulcanized integrally with the cold shrink three-finger sleeve 1 and the cold shrink insulating tube 2 respectively, and then expanded and lined with a plastic spiral support. The tensile pad 5 can improve the tensile performance of the connection to prevent loosening and separation, and the sealing pad 4 can improve the sealing performance of the connection to prevent water ingress.

[0019] The sealing pad insertion groove 13 is arranged outside the tensile pad insertion groove 14, and the tensile pad limiting opening 16 is arranged outside the sealing pad limiting groove 15. This arrangement can prevent rainwater from entering from the tensile pad limiting opening 16, and the sealing reliability is higher.

[0020] It also includes a reinforcing retaining spring 6. The rear end outer wall of the cold shrink terminal head 3 and the rear end outer wall of the cold shrink insulation tube 2 are both provided with a retaining spring locking groove 20 for locking and limiting the reinforcing retaining spring 6. The reinforcing retaining spring 6 can enhance the tightness of the connection.

[0021] The rear end outer wall of the cold shrink terminal head 3 and the rear end outer wall of the cold shrink insulation tube 2 are both provided with the retaining spring locking groove 20 on the outer wall of the sealing gasket insertion groove 13. The reinforced retaining spring 6 is provided to provide an inward locking force to the sealing gasket 4, so that the tightness of the sealing part is effectively guaranteed.

[0022] The depth of the sealing gasket limiting groove 15 is 0.5mm, and the tooth height of the sealing gasket limiting teeth 18 is less than 0.4mm. Due to the cold shrinkage characteristics, the sealing gasket limiting teeth 18 can compress the internal cables, enhance the tightness, and improve the waterproofness. This range can ensure the sealing of the sealing gasket 4 body to the sealing gasket limiting groove 15.

[0023] The cold shrink three-finger sleeve 1, the cold shrink insulation tube 2 and the cold shrink terminal head 3 are all made of silicone rubber, which has excellent insulation and high elasticity, and can ensure good insulation performance and elastic recovery ability of the cable terminal. The sealing pad 4 and the tensile pad 5 are both made of nitrile rubber, which has excellent corrosion resistance, tear resistance and compression deformation resistance.

[0024] 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 cold shrink terminal with good sealing performance, characterized in that: The invention comprises a cold shrink three-finger sleeve (1), a cold shrink insulation tube (2), a cold shrink terminal head (3), a sealing pad (4) and a tensile pad (5), wherein the cold shrink three-finger sleeve (1) is provided with three cable separation sleeves (8) arranged at intervals around a circular arc, the front end of the cold shrink insulation tube (2) is provided with an insulation tube docking portion (9), the rear end of the cold shrink terminal head (3) is sleeved outside the insulation tube docking portion (9) and the rear end of the cold shrink insulation tube (2) is sleeved outside the cable separation sleeve (8), the cold shrink terminal head (3) is provided with a third cable through hole (10), and the cold shrink insulation tube (2) is provided with a second cable through hole (11) which is communicated with the third cable through hole (10). The inner wall at the rear end of the cold shrink terminal head (3) and the inner wall at the rear end of the cold shrink insulation tube (2) are both provided with a sealing gasket insertion groove (13) corresponding to the sealing gasket (4) and a tensile pad insertion groove (14) corresponding to the tensile pad (5); the outer wall of the insulation tube docking portion (9) and the outer wall of the cable separation sleeve (8) are both provided with a sealing gasket limiting groove (15) and tensile pad limiting openings (16) arranged at intervals around a circular arc; a tensile pad clamping block (17) which is clamped on the tensile pad limiting opening (16) is provided in the tensile pad (5); and sealing gasket limiting teeth (18) corresponding to the sealing gasket limiting grooves (15) are provided in the sealing gasket (4).

2. The cold shrink terminal with good sealing performance according to claim 1, characterized in that: The sealing pad insertion groove (13) is arranged outside the tensile pad insertion groove (14), and the tensile pad limiting opening (16) is arranged outside the sealing pad limiting groove (15).

3. The cold shrink terminal with good sealing performance according to claim 1, characterized in that: It also includes a reinforcing clamping spring (6), and the rear end outer wall of the cold shrink terminal head (3) and the rear end outer wall of the cold shrink insulation tube (2) are both provided with a clamping spring locking groove (20) for locking and limiting the reinforcing clamping spring (6).

4. The cold shrink terminal with good sealing performance according to claim 3, characterized in that: The rear end outer wall of the cold shrink terminal head (3) and the rear end outer wall of the cold shrink insulation tube (2) are both provided with the retaining spring locking groove (20) at the outer wall of the sealing gasket insertion groove (13).

5. The cold shrink terminal with good sealing performance according to claim 1, characterized in that: The depth of the sealing gasket limiting groove (15) is 0.5 mm, and the tooth height of the sealing gasket limiting tooth (18) is less than 0.4 mm.

6. The cold shrink terminal with good sealing performance according to claim 1, characterized in that: The cold shrink three-finger sleeve (1), the cold shrink insulation tube (2) and the cold shrink terminal head (3) are all made of silicone rubber, and the sealing pad (4) and the tensile pad (5) are all made of nitrile rubber.

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