35kv cold contraction type cable intermediate joint

Abstract

The utility model discloses a 35kv cold shrink type cable intermediate joint, comprising an outer semi-conductive shielding layer sleeve, the inner wall of the outer semi-conductive shielding layer sleeve close to the end face is clamped and connected with a stress cone, the middle position of the outer semi-conductive shielding layer sleeve is fixedly connected with a semi-conductive stress control tube, and the semi-conductive stress control tube is clamped and connected with the outer semi-conductive shielding layer sleeve. The outer semi-conductive shielding layer sleeve is sleeved with a cable body through stress cones arranged at the two ends of the inner wall of the outer semi-conductive shielding layer sleeve, the inner wall of the outer semi-conductive shielding layer sleeve is fixedly connected with an insulating layer, and the middle position of the outer wall of the outer semi-conductive shielding layer sleeve is fixedly connected with a prompting convex ring in the circumferential direction. Protruding rings are symmetrically and fixedly connected to the positions, close to the end face, of the outer wall of the outer semi-conductive shielding layer sleeve. According to the utility model, through arranging the sleeve connection type connection structure at the connection part of the cable, the connection work efficiency of the cable intermediate joint can be improved, and the safety performance of the whole product can be improved and the failure rate can be reduced in long-time use.

Description

Technical Field

[0001] The utility model relates to the technical field of power insulation spraying application, in particular to a 35kv cold shrink type cable intermediate joint. Background Art

[0002] In the process of medium and high voltage long-distance power transmission, the transmission of current is completed through cables, and cables are often limited in length. In order to enable the transmission of current to reach a very long distance, multiple cables must be connected. Direct connection is not feasible. There must be a connecting shield in the middle to shield the cable. This connector is the intermediate joint and is an indispensable and important component in the power line.

[0003] The existing 35KV cold shrink cable intermediate joints are widely used, but are limited to low-altitude and low-pollution areas and still use the traditional 10KV method of wrapping a semi-conductive tape at the cable core connection tube to overlap it with the built-in stress tube of the intermediate joint to solve the problem of suspended discharge here. The 35KV cable insulation layer is thicker, so the cable core connection tube is much smaller than the outer diameter of the cable insulation layer. Moreover, the inner diameter of the intermediate joint is consistent, so the cable core connection tube cannot overlap with the built-in stress tube of the intermediate joint. If a wrapped semi-conductive tape is used during installation, it must be wrapped in a very thick layer. When the support strip is pulled out during the installation of the intermediate joint, it is easy to pull the semi-conductive tape onto the cable insulation layer, causing safety hazards or burning accidents. Therefore, the utility model proposes a 35kv cold shrink cable intermediate joint. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a 35kv cold shrink cable intermediate joint, which can improve the connection efficiency of the cable intermediate joint by arranging a sleeve-type connection structure at the connection point of the cable, and can improve the safety performance of the entire product and reduce the failure rate during long-term use.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a 35kv cold shrinkable cable intermediate joint, including an outer semi-conductive shielding layer sleeve, the inner wall of the outer semi-conductive shielding layer sleeve is snap-connected with a stress cone near the end face, the middle position of the outer semi-conductive shielding layer sleeve is fixedly connected with a semi-conductive stress control tube, and the outer semi-conductive shielding layer sleeve is connected to the cable body through the stress cone sleeves arranged at both ends of the inner wall.

[0006] The utility model is further configured as follows: an insulating layer is fixedly connected to the inner wall of the outer semi-conductive shielding layer sleeve, a prompt convex ring is fixedly connected to the middle position of the outer wall of the outer semi-conductive shielding layer sleeve in the circumferential direction, and a convex ring is symmetrically fixedly connected to the outer wall of the outer semi-conductive shielding layer sleeve near the end surface.

[0007] Through the above technical scheme, it is convenient to insulate the interior of the insulating layer formed after injecting liquid, and the protection effect on the interior is improved. At the same time, the reminder convex ring can be used as a reminder when connecting the outer semi-conductive shielding layer sleeve with internal parts during installation, and the raised ring on the end face can improve the sealing effect between the end face of the outer semi-conductive shielding layer sleeve and the cable.

[0008] The utility model is further configured as follows: a limited fixing portion is arranged near the middle of the inner wall of the stress cone, and is arranged as a 45-degree slope, and is tightly fitted with the cable semi-conductive layer extending from the cable body to the inside of the stress cone.

[0009] Through the above technical solution, the limiting fixing part of the stress cone can be connected and fixed at 345 degrees with the connection of the semi-conductive layer of the cable, so as to insert and fix the cable, thereby improving the convenience during connection.

[0010] The utility model is further configured as follows: an end surface of the stress cone away from the port of the outer semi-conductive shielding layer sleeve is provided with an opening, and the opening is configured as a trumpet mouth that expands outwards.

[0011] Through the above technical solution, when the cable end is connected and fixed, it can be inserted into the interior of the outer semi-conductive shielding layer sleeve through the stress cone to prevent bending during insertion.

[0012] The utility model is further configured as follows: a positioning convex ring is fixedly connected to the middle position of the inner wall of the semi-conductive stress control tube, and an arc-shaped port is arranged on the end surface of the semi-conductive stress control tube.

[0013] Through the above technical solution, it is convenient to use the positioning convex ring to clamp and fix the inserted connecting tube, so that the connecting tube fixes the connected cable end to prevent it from falling off during use, and effectively contact to prevent the generation of suspended discharge.

[0014] The utility model is further configured as follows: the two ends are relative to the cable body and extend to the inner center position of the outer semi-conductive shielding layer sleeve through the internally arranged cable insulation sleeve, the end faces of the two cable insulation sleeves both extend wire cores, and the outer walls of the two wire cores are both wrapped with connecting tubes.

[0015] Through the above technical scheme, when the cable is connected, the practical connecting tube can stably wrap and fix the internal wire core, so that the wire core connection is fixed, and under the wrapping action of the semi-conductive stress control tube inside the outer semi-conductive shielding layer, the cable body connection can be stably fixed, thereby improving the protection and firmness during use.

[0016] The utility model is further configured as follows: the inner wall of the semi-conductive stress control tube is tightly fitted with the outer wall of the connecting tube, and the inner walls at both ends of the semi-conductive stress control tube respectively cover the end surfaces of the two cable insulation sleeves.

[0017] The above technical solution facilitates the protection stability when connecting the wire cores inside the cable body, and prevents the outer semi-conductive shielding layer from falling off and separating.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model proposes a 35kv cold shrink cable intermediate joint, which is provided with a sleeve-type connection structure at the cable connection, so that the connection work efficiency of the cable intermediate joint can be improved, and the safety performance of the entire product can be improved and the failure rate can be reduced during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of a 35kv cold shrink cable intermediate joint of the utility model;

[0021] Figure 2 This is a connection cross-sectional view of a 35kv cold shrinkable cable intermediate joint of the utility model.

[0022] In the figure: 100, outer semi-conductive shielding layer sleeve; 101, insulating layer; 102, reminder convex ring; 103, raised ring; 200, stress cone; 201, limiting fixing part; 202, opening; 300, semi-conductive stress control tube; 301, positioning convex ring; 302, port; 400, cable body; 401, cable semi-conductive layer; 402, cable insulating sleeve; 403, wire core; 404, connecting tube. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0024] like Figure 1 and Figure 2As shown, a 35kv cold shrink cable intermediate joint comprises an outer semi-conductive shielding layer sleeve 100, the inner wall of the outer semi-conductive shielding layer sleeve 100 is fixedly connected with an insulating layer 101, a prompt convex ring 102 is fixedly connected in the circumferential direction at the middle position of the outer wall of the outer semi-conductive shielding layer sleeve 100, and a convex ring 103 is symmetrically fixedly connected to the outer wall of the outer semi-conductive shielding layer sleeve 100 near the end surface, so that the insulating layer 101 formed after the liquid is injected can be used to insulate the interior and improve the protection effect of the interior. At the same time, the prompt convex ring 102 can be used to remind the connection between the outer semi-conductive shielding layer sleeve 100 and the internal parts during installation, and the convex ring 103 on the end surface can improve the end surface of the outer semi-conductive shielding layer sleeve 100 and the electrical The sealing effect between the cables is improved. The inner wall of the outer semi-conductive shielding layer sleeve 100 is connected with a stress cone 200 near the end surface. The inner wall of the stress cone 200 is provided with a limited fixing portion 201 near the middle position, and is set at a 45-degree slope. At the same time, it is closely fitted with the cable body 400 extending to the cable semi-conductive layer 401 arranged inside the stress cone 200, so that the limited fixing portion 201 of the stress cone 200 can be connected and fixed at a 345-degree angle with the connection of the cable semi-conductive layer 401, thereby inserting and fixing the cable, improving the convenience during connection. The end face of the stress cone 200 away from the port of the outer semi-conductive shielding layer sleeve 100 is provided with an opening 202, and the opening 202 is set in an outwardly expanding trumpet mouth, which is convenient for the cable When the end is connected and fixed, it can be inserted into the interior of the outer semi-conductive shielding layer sleeve 100 through the stress cone 200 to prevent bending during insertion. The middle position of the outer semi-conductive shielding layer sleeve 100 is fixedly connected with a semi-conductive stress control tube 300, and the middle position of the inner wall of the semi-conductive stress control tube 300 is fixedly connected with a positioning convex ring 301. The end face of the semi-conductive stress control tube is provided with an arc port 302, which is convenient for using the positioning convex ring 301 to clamp and fix the inserted connecting tube 404, so that the connecting tube 404 fixes the connected cable end to prevent it from falling off during use. The outer semi-conductive shielding layer sleeve 100 is sleeved with the cable body 400 through the stress cones 200 set at both ends of the inner wall, and the two ends are relative. The cable body 400 extends to the inner center position of the outer semi-conductive shielding layer sleeve 100 through the cable insulation sleeve 402 arranged inside. The end faces of the two cable insulation sleeves 402 both extend wire cores 403. The outer walls of the two wire cores 403 are wrapped with connecting tubes 404, which are convenient for connecting the cables. The practical connecting tubes 404 can stably wrap and fix the inner wire cores 403, so that the wire cores 403 are connected and fixed, and under the wrapping effect of the semi-conductive stress control tube 300 inside the outer semi-conductive shielding layer sleeve 100, the connection of the cable body 400 can be stably fixed, thereby improving the protection and firmness during use. The inner wall of the semi-conductive stress control tube 300 is tightly fitted with the outer wall of the connecting tube 404.The inner walls of both ends of the semi-conductive stress control tube 300 cover the end surfaces of the two cable insulation sleeves 402, which is convenient for the protection stability when the wire cores 403 inside the cable body 400 are connected, and prevents the outer semi-conductive shielding layer sleeve 100 from falling off and separating.

[0025] When the utility model is used, the semi-conductive stress control tube 300 is first sleeved on the middle part of the mold core, and the two stress cones 200 are sleeved on the end face position, and then the outer semi-conductive shielding layer sleeve 100 is sleeved, and then the liquid insulating silicone insulating layer 101 is injected, and it is formed into a whole through high-temperature vulcanization, and then the internal mold core is removed, and the internal connecting tube 404 is inserted into the interior of the semi-conductive stress control tube 300, and it is clamped and fixed by the internal positioning convex ring 301, and effective contact is prevented from generating suspended discharge, and then the cable end face is inserted into the interior of the connecting tube 404 through the wire core 403 for connection, and the end face of the cable semi-conductive layer 401 is connected and fixed with the limiting fixing part 201 inside the stress cone 200 at 45 degrees, thereby completing the connection and fixation of the cable intermediate joint.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A 35kv cold shrink cable intermediate joint, comprising an outer semi-conductive shielding layer sleeve (100), characterized in that: The inner wall of the outer semi-conductive shielding layer sleeve (100) is snap-connected with a stress cone (200) near the end surface, the middle of the outer semi-conductive shielding layer sleeve (100) is fixedly connected with a semi-conductive stress control tube (300), and the outer semi-conductive shielding layer sleeve (100) is sleeved with a cable body (400) via stress cones (200) arranged at both ends of the inner wall.

2. A 35kv cold shrink cable intermediate joint according to claim 1, characterized in that: The inner wall of the outer semi-conductive shielding layer sleeve (100) is fixedly connected with an insulating layer (101), the middle part of the outer wall of the outer semi-conductive shielding layer sleeve (100) is fixedly connected with a prompt convex ring (102) in the circumferential direction, and the outer wall of the outer semi-conductive shielding layer sleeve (100) is symmetrically fixedly connected with a convex ring (103) near the end surface.

3. A 35kv cold shrink cable intermediate joint according to claim 1, characterized in that: A limited position fixing portion (201) is provided near the middle of the inner wall of the stress cone (200) and is arranged as a 45-degree slope, and is closely fitted with a cable semi-conductive layer (401) extending from the cable body (400) to the inside of the stress cone (200).

4. A 35kv cold shrink cable intermediate joint according to claim 1, characterized in that: An opening (202) is arranged on the end surface of the stress cone (200) away from the port of the outer semi-conductive shielding layer sleeve (100), and the opening (202) is arranged in the form of a trumpet mouth that expands outwards.

5. A 35kv cold shrink cable intermediate joint according to claim 1, characterized in that: A positioning convex ring (301) is fixedly connected to the middle of the inner wall of the semi-conductive stress control tube (300), and an arc-shaped port (302) is provided on the end surface of the semi-conductive stress control tube.

6. A 35kv cold shrink cable intermediate joint according to claim 1, characterized in that: The cable body (400) at both ends extends to the inner center position of the outer semi-conductive shielding layer sleeve (100) through the cable insulation sleeve (402) arranged inside, and the end surfaces of the two cable insulation sleeves (402) both extend with a wire core (403), and the outer walls of the two wire cores (403) are both wrapped with a connecting tube (404).

7. A 35kv cold shrink cable intermediate joint according to claim 6, characterized in that: The inner wall of the semi-conductive stress control tube (300) is arranged in close contact with the outer wall of the connecting tube (404), and the inner walls at both ends of the semi-conductive stress control tube (300) respectively cover the end surfaces of the two cable insulation sleeves (402).

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