High-stability three-core cable cold shrinkage terminal

Abstract

The utility model discloses a high-stability three-core cable cold-contraction terminal, which relates to the technical field of three-core cable cold-contraction terminals and comprises a group of cold-contraction terminal main bodies, the top end of each cold-contraction terminal main body is provided with a wiring terminal, a cold-contraction fragrant tube is arranged below each wiring terminal, and the cold-contraction fragrant tube is connected with the cold-contraction terminal main body. A cable conductor is arranged in each cold shrinkage fragrant tube, a cable insulation layer is arranged in each cold shrinkage terminal body, and a cable insulation shielding layer is fixedly connected to the annular side face of each cable insulation layer. The wiring terminal arranged on the cold shrinkage terminal body is used for connecting a conductor and equipment, the reliability and stability of electrical connection are guaranteed, sealing protection of the cable connector is achieved through the cold shrinkage fragrant tube in the using process, water, dust and the like are prevented from entering the cable connector, and the service life of the cable connector is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of three-core cable cold shrink terminals, in particular to a high-stability three-core cable cold shrink terminal. Background Art

[0002] The three-core cable cold shrink terminal is a cable accessory installed using cold shrink technology. It is mainly used for the end processing of 35kV three-core cross-linked cables. The electrical insulation and mechanical protection of the cable ends are achieved through specially designed silicone rubber materials. The design principle of the three-core cable cold shrink terminal is to use highly elastic silicone rubber material to insert it into the cable end in a pre-expanded state, and then the material is tightly wrapped around the cable by extracting the built-in support strips. However, in the long-term operation process, its physical and chemical properties have changed, resulting in a decrease in sealing performance, thereby affecting the reliability of the entire cable system. For example, silicone rubber materials may age rapidly due to temperature fluctuations, ultraviolet radiation or chemical erosion. This aging process may cause the contraction force of the terminal to decrease, and it cannot effectively maintain its tight wrapping of the cable, thereby affecting the insulation performance and service life of the cable. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a high-stability three-core cable cold shrink terminal, which solves the problem that during long-term operation, its physical and chemical properties change, resulting in a decrease in sealing performance, thereby affecting the reliability of the entire cable system.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-stability three-core cable cold shrink terminal, including a group of cold shrink terminal bodies, each of which is provided with a wiring terminal on the top, a cold shrink tube is provided under each of the wiring terminals, a cable conductor is provided in each of the cold shrink tubes, a cable insulation layer is provided in each of the cold shrink terminal bodies, a cable insulation shielding layer is fixedly connected to the annular side of each of the cable insulation layers, and a semi-conductive belt is provided on the annular side of each of the cable conductors.

[0007] As a preferred technical solution of the utility model, a cold shrink insulation tube is provided on the lower surface of each cable insulation shielding layer.

[0008] As a preferred technical solution of the utility model, a constant force spring is arranged on the lower surface of a group of the cold shrinkable insulating tubes.

[0009] As a preferred technical solution of the utility model, a cold-shrinkable three-finger sleeve is provided on the annular side of the constant force spring.

[0010] As a preferred technical solution of the utility model, a cable outer sheath is arranged on the surface of the cold shrink three-finger sleeve, and a grounding copper braided wire is arranged inside the cable outer sheath.

[0011] (III) Beneficial effects

[0012] 1. The main body of the cold shrink terminal is responsible for the mechanical protection and insulation of the cable joint. The wiring terminals arranged on the main body of the cold shrink terminal are used to connect conductors and equipment to ensure the reliability and stability of the electrical connection. During use, the cold shrink tube is used to seal the cable joint to prevent the entry of moisture, dust, etc., thereby increasing the service life of the cable joint. The semi-conductive belt arranged on the annular side of the cable conductor is used to improve the electric field distribution and improve the electrical and waterproof properties of the cable joint. A cable insulation shielding layer is arranged at the connection between the cable insulation layer and the cold shrink insulation tube to improve the possibility of local discharge at the joint and improve the electrical performance at the joint.

[0013] 2. A constant force spring is arranged between the cable outer sheath and a group of cold shrink insulating tubes to fix the cable joint and ensure the stability and reliability of the cable joint. The grounding copper braided wire arranged in the cable outer sheath is used to realize the grounding protection of the cable joint and improve the safety performance of the cable system. The cable outer sheath as a whole protects the cable from mechanical damage, chemical corrosion, etc., and prolongs the service life of the cable as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0015] Figure 1 It is the overall structure diagram of the utility model.

[0016] Legend: 1. Wiring terminal; 2. Cold shrink scented tube; 3. Cable conductor; 4. Semi-conductive tape; 5. Cold shrink terminal body; 6. Cable insulation layer; 7. Cable insulation shielding layer; 8. Cold shrink insulation tube; 9. Constant force spring; 10. Cold shrink three-finger sleeve; 11. Grounding copper braided wire; 12. Cable outer sheath. DETAILED DESCRIPTION

[0017] The embodiment of the present application provides a high-stability three-core cable cold shrink terminal, which effectively solves the problem that during long-term operation, the physical and chemical properties of the cable change, resulting in a decrease in sealing performance, thereby affecting the reliability of the entire cable system. The cold shrink terminal body 5 is responsible for the mechanical protection and insulation of the cable joint. The terminal block 1 provided on the cold shrink terminal body 5 is used to connect the conductor and the equipment to ensure the reliability and stability of the electrical connection. During use, the cold shrink tube 2 is used to seal the cable joint to prevent the entry of moisture, dust, etc., thereby improving the service life of the cable joint. The semi-conductive belt 4 provided on the annular side of the cable conductor 3 is used to improve the electric field distribution and improve the electrical performance and waterproof performance of the cable joint.

[0018] Example

[0019] like Figure 1 As shown, the technical solution in the embodiment of the present application effectively solves the problem that the physical and chemical properties change during long-term operation, resulting in a decrease in sealing performance, thereby affecting the reliability of the entire cable system. The overall idea is as follows:

[0020] In view of the problems existing in the prior art, the utility model provides a high-stability three-core cable cold shrink terminal, including a group of cold shrink terminal bodies 5, each of which is provided with a wiring terminal 1 at the top, a cold shrink tube 2 is provided under each wiring terminal 1, a cable conductor 3 is provided in each cold shrink tube 2, a cable insulation layer 6 is provided in each cold shrink terminal body 5, a cable insulation shielding layer 7 is fixedly connected to the annular side of each cable insulation layer 6, and a semi-conductive belt 4 is provided on the annular side of each cable conductor 3. The cold shrink terminal body 5 is responsible for the mechanical protection and insulation of the cable joint. The wiring terminal 1 provided on the cold shrink terminal body 5 is used to connect the conductor and the equipment to ensure the reliability and stability of the electrical connection. During use, the cold shrink tube 2 is used to achieve sealing protection of the cable joint to prevent the entry of moisture, dust, etc., thereby improving the service life of the cable joint.

[0021] A cold shrinkable insulating tube 8 is provided on the lower surface of each cable insulation shielding layer 7, and a constant force spring 9 is provided on the lower surface of a group of cold shrinkable insulating tubes 8. The semi-conductive belt 4 provided on the annular side of the cable conductor 3 is used to improve the electric field distribution and improve the electrical performance and waterproof performance of the cable joint. A cable insulation shielding layer 7 is provided at the connection between the cable insulation layer 6 and the cold shrinkable insulating tube 8 to improve the possibility of local discharge at the joint and improve the electrical performance at the joint.

[0022] A cold shrink three-finger sleeve 10 is arranged on the annular side of the constant force spring 9, a cable outer sheath 12 is arranged on the surface of the cold shrink three-finger sleeve 10, a grounding copper braided wire 11 is arranged inside the cable outer sheath 12, and a constant force spring 9 is arranged between the cable outer sheath 12 and a group of cold shrink insulating tubes 8 for fixing the cable joint to ensure the stability and reliability of the cable joint. The grounding copper braided wire 11 arranged inside the cable outer sheath 12 is used to realize the grounding protection of the cable joint and improve the safety performance of the cable system. The cable outer sheath 12 as a whole protects the cable from mechanical damage, chemical corrosion, etc., thereby extending the service life of the cable as a whole.

[0023] Working principle:

[0024] The cold shrink terminal body 5 is responsible for the mechanical protection and insulation of the cable joint. The terminal block 1 arranged on the cold shrink terminal body 5 is used to connect the conductor and the equipment to ensure the reliability and stability of the electrical connection. During use, the cold shrink tube 2 is used to seal the cable joint to prevent the entry of moisture, dust, etc., thereby increasing the service life of the cable joint. The semi-conductive belt 4 arranged on the annular side of the cable conductor 3 is used to improve the electric field distribution and improve the electrical performance and waterproof performance of the cable joint. A cable insulation shielding layer 7 is arranged at the connection between the cable insulation layer 6 and the cold shrink insulation tube 8 to improve the possibility of local discharge at the joint and improve the electrical performance at the joint. A constant force spring 9 is arranged between the cable outer sheath 12 and a group of cold shrink insulation tubes 8 to fix the cable joint and ensure the stability and reliability of the cable joint. The grounding copper braided wire 11 arranged in the cable outer sheath 12 is used to achieve grounding protection of the cable joint and improve the safety performance of the cable system. The cable outer sheath 12 as a whole protects the cable from mechanical damage, chemical corrosion, etc., thereby extending the service life of the entire cable.

[0025] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A high-stability three-core cable cold shrink terminal, comprising a set of cold shrink terminal bodies (5), characterized in that: A connection terminal (1) is arranged at the top of each cold shrink terminal body (5), and a cold shrink scented tube (2) is arranged below each connection terminal (1); Each of the cold shrinkable fragrance tubes (2) is provided with a cable conductor (3), each of the cold shrinkable terminal bodies (5) is provided with a cable insulation layer (6), and each of the annular side surfaces of the cable insulation layer (6) is fixedly connected with a cable insulation shielding layer (7).

2. A high stability three-core cable cold shrink terminal as claimed in claim 1, characterized in that: A semi-conductive tape (4) is provided on the annular side surface of each cable conductor (3).

3. A high stability three-core cable cold shrink terminal as claimed in claim 2, characterized in that: A cold shrink insulation tube (8) is provided on the lower surface of each cable insulation shielding layer (7).

4. A high stability three-core cable cold shrink terminal as claimed in claim 3, characterized in that: A constant force spring (9) is provided on the lower surface of a group of the cold shrink insulation tubes (8).

5. A high stability three-core cable cold shrink terminal as claimed in claim 4, characterized in that: The annular side surface of the constant force spring (9) is provided with a cold shrink three-finger sleeve (10).

6. A high stability three-core cable cold shrink terminal as claimed in claim 5, characterized in that: The surface of the cold shrink three-finger sleeve (10) is provided with a cable outer sheath (12); Wherein, a grounding copper braided wire (11) is arranged inside the cable outer sheath (12).

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