Three-core high-performance joint

Abstract

The utility model discloses a three-core high-performance joint, which relates to the technical field of connecting joints, and comprises a middle joint body, a waterproof adhesive tape is wrapped on the outer wall of the connecting position of the middle joint body and a three-core cable, an armor tape is wrapped on the outer wall of the waterproof adhesive tape, a PVC (polyvinyl chloride) adhesive tape is wrapped outside the armor tape, and the PVC adhesive tape is wrapped on the outer wall of the middle joint body. The comprehensive waterproof wrapping treatment of the intermediate joint body and the three-core cable is realized; a three-core cable is connected through the intermediate joint body, then the waterproof adhesive tape wraps the three-core cable and the outer wall of the intermediate joint body, then the waterproof adhesive tape is subjected to secondary wrapping and sealing treatment through the armoring tape, and then the armoring tape is subjected to tertiary wrapping and sealing treatment through the PVC adhesive tape. Therefore, the intermediate joint body and the three-core cable can be subjected to comprehensive waterproof wrapping treatment, the phenomenon that external moisture or water enters the intermediate joint body and the three-core cable is avoided, and the service life of the three-core cable is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to connecting joint technical field, specifically is a three core high performance joint. BACKGROUND

[0002] It is known that the three core high performance joint is a device for connecting three core cables, and the three core high performance joint is a cable accessory for the intermediate connection of a cross-linked cable with a low voltage level. The main function is to keep the line smooth, keep the cable sealed, and ensure the insulation level at the cable joint to ensure safe and reliable operation.

[0003] For example, the patent with the announcement number CN206759022U, the announcement date of December 15, 2017, and the name of "cable joint assembly and cable joint system" provides a kind of cable joint assembly, comprising: joint body, with two ends;Peripherally around the conductive mesh cover of joint body, the two ends of conductive mesh cover can be respectively extended beyond the two ends of joint body;Peripherally around the sheath of conductive mesh cover, the two ends of sheath can be respectively extended beyond the two ends of joint body;Insulating ground wire is arranged between sheath and joint body, and the two ends of insulating ground wire can be respectively extended beyond the two ends of joint body. The cable joint assembly provided by the patent can be used to conveniently joint cable to obtain cable joint system. Correspondingly, the patent also provides a kind of cable joint system.

[0004] The prior art has the following disadvantages: when connecting the cable, the end of the three core intermediate joint is not completely sealed, which causes external moisture or water to enter the three core intermediate joint, thereby affecting the use of the cable. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of three core high performance joint to solve the above-mentioned problems in prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of three core high performance joint, including intermediate joint body, the outer wall of the intermediate joint body and three core cable connection position is wrapped with waterproof adhesive tape, the outer wall of waterproof adhesive tape is wrapped with armored belt, the armored belt is wrapped with PVC adhesive tape outside, realizes the overall waterproof wrapping treatment of intermediate joint body and three core cable.

[0007] The above-mentioned intermediate joint body is provided with a semi-conductive inner shielding layer in the middle part.

[0008] The above-mentioned intermediate joint body is provided with a connecting pipe in the middle part inside the semi-conductive inner shielding layer.

[0009] The above-mentioned connecting pipe is made of metal material.

[0010] As mentioned above, two annular grooves are symmetrically opened at both ends of the interior of the intermediate connector body.

[0011] As mentioned above, each of the two annular grooves is provided with a half-conductive stress cone.

[0012] As mentioned above, the radius of both annular grooves and the semi-conductive stress cone gradually increases from the end furthest from the connecting pipe to the end closest to the connecting pipe.

[0013] As mentioned above, the outer wall of the intermediate joint body is wrapped with tin-plated copper mesh.

[0014] As mentioned above, the ends of the tin-plated copper mesh are wrapped with tin-plated copper braided strips.

[0015] As mentioned above, a constant force spring is provided on the outer wall of the three-core cable.

[0016] The beneficial effects of this utility model are as follows: the three-core cable is connected by the intermediate connector body, then waterproof tape is wrapped around the outer wall of the three-core cable and the intermediate connector body, then the waterproof tape is wrapped and sealed a second time by the armor tape, and then the armor tape is wrapped and sealed a third time by the PVC tape. This allows the intermediate connector body and the three-core cable to be fully waterproofed, preventing external moisture or water from entering the intermediate connector body and the interior of the three-core cable, thus improving the service life of the three-core cable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a partial cross-sectional structural diagram of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Intermediate joint body; 2. Three-core cable; 3. Waterproof tape; 4. Armor tape; 5. PVC tape; 6. Semi-conductive inner shielding layer; 7. Connecting fittings; 8. Tinned copper mesh; 9. Tinned copper braided tape; 10. Semi-conductive stress cone; 11. Constant force spring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1As shown, an embodiment of the utility model provides a kind of three-core high-performance joint, including intermediate joint body 1, the outer wall of the connecting position of intermediate joint body 1 and three-core cable 2 is wrapped with waterproof tape 3, the outer wall of waterproof tape 3 is wrapped with armored belt 4, the outer wrapping of armored belt 4 is PVC tape 5, realize the overall waterproof wrapping treatment of intermediate joint body 1 and three-core cable 2.

[0023] Specifically, intermediate joint body 1 is joint by rubber material prefabricated, intermediate joint body 1 is used to connect three-core cable 2, the middle part of intermediate joint body 1 is provided with a half-conductive inner shield layer 6, half-conductive inner shield layer 6 can eliminate the air gap on the surface of conductive wire core (that is, three-core cable 2), improve the ability of partial discharge, branch discharge, the middle part of intermediate joint body 1 is located in half-conductive inner shield layer 6 and is provided with connecting pipe fitting 7;Connecting pipe fitting 7 is made of metal material, three-core cable 2 is connected by connecting pipe fitting 7, the outer wall of intermediate joint body 1 is wrapped with tinned copper mesh 8;The end of tinned copper mesh 8 is wrapped with tinned copper braid 9, the metal shield layer of cable is connected by tinned copper mesh 8 and tinned copper braid 9, so that the connection of three-core cable 2 is more stable, when intermediate joint body 1 completes the connection of three-core cable 2, intermediate joint body 1 and three-core cable 2 are initially wrapped and sealed waterproof treatment by waterproof tape 3, then armored belt 4 is wrapped outside waterproof tape 3, so that armored belt 4 carries out secondary wrapping and sealing waterproof treatment to intermediate joint body 1 and three-core cable 2, and three-core cable 2 is connected completely sealed by PVC tape 5 to armored belt 4 three times wrapping and sealing waterproof treatment, so that the connecting part of intermediate joint body 1 and three-core cable 2 is completely sealed, and the phenomenon that external moisture or water enters the inside of intermediate joint body 1 and three-core cable 2 does not occur, the service life of three-core cable 2 is improved.

[0024] The deficiencies of the prior art are that when the three-core intermediate joint connects the cable, due to the incomplete sealing of the end of the three-core intermediate joint, external moisture or water enters the three-core intermediate joint, thereby affecting the use of the cable.

[0025] The utility model has the advantages that intermediate joint body 1 is connected to three-core cable 2, waterproof tape 3 is wrapped on the outer wall of three-core cable 2 and intermediate joint body 1, armored belt 4 is used for secondary wrapping and sealing treatment of waterproof tape 3, and PVC tape 5 is used for three times wrapping and sealing treatment of armored belt 4, so that intermediate joint body 1 and three-core cable 2 can be completely waterproofed, external moisture or water cannot enter the inside of intermediate joint body 1 and three-core cable 2, and the service life of three-core cable 2 is improved.

[0026] In another embodiment of the utility model, two annular grooves are symmetrically arranged at the two ends of the intermediate joint body 1; a semi-conductive stress cone 10 is arranged in each of the two annular grooves; the two annular grooves and the semi-conductive stress cone 10 gradually increase in radius from the end far away from the connecting pipe 7 to the end close to the connecting pipe 7, and specifically, an electric field is generated at the connecting position of the intermediate joint body 1 and the three-core cable 2, the semi-conductive stress cone 10 is used to homogenize the electric field concentration, the semi-conductive stress cone 10 has long-term stability in processing the electric field, which is convenient for stable operation of the three-core cable 2, the electric field stress part and the insulation are integrated as a whole, the chromatography is reduced, the partial discharge is effectively reduced, the semi-conductive stress cone 10 has high elasticity, the semi-conductive stress cone 10 maintains radial pressure on the three-core cable 2 after installation, which can effectively reduce the partial discharge and the surface discharge, the semi-conductive stress cone 10 also has the effects of preventing moisture and preventing dampness on the three-core cable 2 and the intermediate joint body 1, the length of the semi-conductive stress cone 10 used in the embodiment is longer than the length of the stress cone in the prior art, and the increase in the length of the semi-conductive stress cone 10 can not only increase the lap length of the intermediate joint body 1 and the three-core cable 2, but also greatly improve the conductivity and waterproof performance of the intermediate joint body 1.

[0027] In another embodiment of the utility model, a constant force spring 11 is arranged on the outer wall of the three-core cable 2, and specifically, the constant force spring 11 is used to save the contact resistance (the contact resistance refers to the resistance generated between two electrodes due to incomplete contact of the contact surface) of the three-core cable 2 and the intermediate joint body 1, the contact resistance can improve the conductivity of the three-core cable 2 and the intermediate joint body 1 and the effective utilization of electric energy, and the constant force spring 11 is designed according to the torque balance principle, can keep the balance of the load torque and the spring torque between the three-core cable 2 and the intermediate joint body 1, can reduce the displacement stress of the three-core cable 2 and the intermediate joint body 1, and avoid the generation of dangerous bending stress and adverse stress transfer, thereby reducing the problem of excessive contact resistance to a certain extent, the constant force spring 11 provides stable supporting force, reduces the change of the contact surface caused by physical displacement, and further reduces the increase of the contact resistance caused by poor contact of the three-core cable 2 and the intermediate joint body 1.

[0028] The above only describes certain exemplary embodiments of the utility model in a descriptive manner, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A three core high performance splice comprising a central splice body, characterised in that, The intermediate joint body is wrapped with a waterproof tape on the outer wall of the three-core cable connection position, the waterproof tape is wrapped with an armored tape on the outer wall, and the armored tape is wrapped with a PVC tape on the outside, so as to realize comprehensive waterproof wrapping treatment of the intermediate joint body and the three-core cable.

2. A three-core high performance joint according to claim 1, characterized in that, The intermediate joint body is provided with a semi-conductive inner shielding layer in the middle part.

3. A three-core high performance joint according to claim 2, characterized in that The intermediate joint body is provided with a connecting pipe in the middle part in the semi-conductive inner shielding layer.

4. A three-core high performance joint according to claim 3, characterized in that, The connecting pipe is made of metal material.

5. A three-core high performance connector as claimed in claim 1, wherein, Two annular grooves are symmetrically arranged at the two ends of the intermediate joint body.

6. A three-core high performance joint according to claim 5, characterized in that Two semi-conductive stress cones are arranged in the two annular grooves respectively.

7. A three-core high performance joint according to claim 6, characterized in that The two annular grooves and the semi-conductive stress cones gradually increase in radius from the end far away from the connecting pipe to the end close to the connecting pipe.

8. A three-core high performance joint as claimed in claim 1, characterized in that, The intermediate joint body is wrapped with a tinned copper mesh on the outer wall.

9. A three-core high performance joint according to claim 8, characterized in that, The end of the tinned copper mesh is wrapped with a tinned copper braided tape.

10. A three-core high performance connector as claimed in claim 1, wherein, The three-core cable is provided with a constant force spring on the outer wall.

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