AU2020102675A4

AU2020102675A4 - Shock absorption cable joint for high-voltage cable

Info

Publication number: AU2020102675A4
Application number: AU2020102675A
Authority: AU
Inventors: Chao DAI; Mian DAI; Wenzhong DAI; Yu DAI; Zhang DAI; Liang Li; Yujuan WU
Original assignee: Anhui Yefarad Electric Co Ltd
Current assignee: Anhui Yefarad Electric Co Ltd
Priority date: 2020-09-21
Filing date: 2020-10-12
Publication date: 2020-12-03
Anticipated expiration: 2028-10-12
Also published as: CN112018718A; CN112018718B

Abstract

The present invention discloses a shock absorption cable joint for a high-voltage cable, comprising a cable joint body, an outer sheath and a non-slipping sleeve. The cable joint body is penetrated on the inner side of the outer sheath; the non-slipping sleeve is arranged in the middle of the inner side of the outer sheath; a plurality of non-slipping rings are arranged on the inner wall of the non-slipping sleeve; and the cable joint body penetrates through the non-slipping sleeve and comes into contact with the inner walls of the non-slipping rings. The cable joint can further block the impact of the external force by adding the outer sheath, thereby improving the shock resistant performance. In order to prevent the outer sheath and the cable joint body from sliding and wearing the cable joint body, the non-slipping sleeve is also arranged in the outer sheath. A certain damping force is applied to the cable joint body by the non-slipping rings, so as to firmly limit the cable joint body into the outer sheath and further improve the overall stability of the cable joint. 1 DRAWINGS OF DESCRIPTION 1 8 2 3 6 5 21 7 Fig. 1 10004 I||||||||||||||1 2006.7 I1111li

Description

DRAWINGS OF DESCRIPTION

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DESCRIPTION SHOCK ABSORPTION CABLE JOINT FOR HIGH-VOLTAGE CABLE

Technical Field

The present invention relates to the technical field of electrical equipment, more particularly to a shock absorption cable joint for a high-voltage cable.

Background

At present, with the continuous increase of the coverage of the power grid, after cables used to connect power equipment are laid, in order to become a continuous line, each section of the cables shall be connected as a whole. Generally, each section of the cables is connected through a cable joint. Although the existing cable joint can lock and fix the incoming and outgoing wires, because the cable joint is inevitably impacted by an external force in an actual use environment, strong impact may reduce the sealing performance of the cable joint and the stability is difficult to guarantee. The damage of the cable joint leads to short-circuit, open circuit and other faults, which not only affects the normal energization, but also easily causes safety accidents such as fire and electric shock. Therefore, the problem to be urgently solved by those skilled in the art is how to provide a cable joint with safety, firmness and good earthquake-proof performance.

Summary

DESCRIPTION In view of this, the present invention provides a shock absorption cable joint for a high-voltage cable. The joint blocks the impact of an external force through an outer sheath, and prevents a cable joint body from sliding and wearing through a non-slipping sleeve, so as to solve the problems of low stability and poor shock resistant effect of the existing cable joints. To achieve the above purpose, the present invention adopts the following technical solution: A shock absorption cable joint for a high-voltage cable comprises a cable joint body, an outer sheath and a non-slipping sleeve. The cable joint body is penetrated on the inner side of the outer sheath; the non-slipping sleeve is arranged in the middle of the inner side of the outer sheath; a plurality of non-slipping rings are arranged on the inner wall of the non-slipping sleeve; and the cable joint body penetrates through the non-slipping sleeve and comes into contact with the inner walls of the non-slipping rings. The present invention has the beneficial effects: the cable joint can further block the impact of the external force by adding the outer sheath, thereby improving the shock resistant performance. In order to prevent the outer sheath and the cable joint body from sliding and wearing the cable joint body, the non-slipping sleeve is also arranged in the outer sheath. A certain damping force is applied to the cable joint body by the non-slipping rings, so as to firmly limit the cable joint body into the outer sheath and further improve the overall stability of the cable joint. Further, a bending-resistant spring is also arranged in the outer sheath; an opening at one end of the outer sheath is bent inward to form an annular flange; a clamping ring is arranged on the inner side of the outer sheath at one end close to the non-slipping sleeve; one end of the bending-resistant spring is abutted against the inner side wall of the

DESCRIPTION annular flange, and the other end of the bending-resistant spring is abutted against the side wall of the clamping ring; and the cable joint body is penetrated on the inner side of the bending-resistant spring. In the present invention, the bending-resistant spring is twined on the outer side of the cable joint body. When the cable joint body is bent, the bending-resistant spring applies a reverse force to the cable joint body, which can prevent the skin of the cable joint body from being damaged due to frequent bending and excessive bending, thereby improving the overall stability of the cable joint. Further, a sealing gasket is also arranged on one side of the outer sheath having the annular flange; the outer side wall of the annular flange is fixedly connected with the sealing gasket; and the cable joint body penetrates through the sealing gasket and comes into contact with the inner side wall of the sealing gasket. Further, the outer sheath is further provided with a sealing gasket cylinder on one side away from the annular flange; one end of the sealing gasket cylinder extends into the inner side of the outer sheath and is fixedly connected with the inner side wall of the outer sheath; the end part of one end of the sealing gasket cylinder which extends into the outer sheath is abutted against the outer wall of the end part of the non-slipping sleeve; the other side of the sealing gasket cylinder extends to the outer side of the outer sheath; and the cable joint body penetrates through the sealing gasket cylinder and comes into contact with the inner wall of the sealing gasket cylinder. The sealing gasket and the sealing gasket cylinder are mainly used to prevent external water from penetrating into the interior from a gap between the end part of the outer sheath and the outer wall of the cable joint body to avoid affecting the service life of the cable joint, thereby

DESCRIPTION improving the overall sealing and waterproof performance of the cable joint. Further, the cable joint body comprises an inner sheath and a joint cable; the inner sheath has a waterproof cavity body; the joint cable is penetrated in the waterproof cavity body; the waterproof cavity body is filled with waterproof glue; the inner sheath comprises a sealing layer, a fireproof layer, an insulating layer and a shock absorption layer in sequence from inside to outside; and two adjacent layers are adhesively connected. The arrangement of the inner sheath provides another security assurance for the joint cable, thereby ensuring that the sealing, waterproof, insulation and shock resistant performance of the cable joint meet the standards for safe use. Further, the shock absorption layer comprises an upper wall, shock absorption columns, shock absorption particles, elastic fillers and a lower wall; the elastic fillers and the shock absorption particles are filled between the upper wall and the lower wall; and the shock absorption columns are arranged at equal intervals on the inner walls of the upper wall and the lower wall. Further, the shock absorption particles are of a core-shell structure which uses polymethyl methacrylate as a core and polystyrene as a shell. The arrangement of the shock absorption layer can improve the overall shock resistant performance of the cable joint to the greatest extent, and can avoid the problem of potential safety hazards caused by the reduction of the sealing and waterproof performance of the cable joint due to the impact of the external force. Further, the fireproof layer is a flame-retardant sponge. The flame-retardant sponge has high fireproof performance, is relatively light

DESCRIPTION and is more suitable for being used as the fireproof layer of the inner sheath.

Description of Drawings

To more clearly describe the technical solution in the embodiments of the present invention or in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be simply presented below. Apparently, the drawings in the following description are merely the embodiments of the present invention, and for those ordinary skilled in the art, other drawings can also be obtained according to the provided drawings without contributing creative labor. Fig. 1 is a schematic diagram of an overall structure of a shock absorption cable joint for a high-voltage cable provided by the present invention; Fig. 2 is a structural schematic diagram of a cable joint body in embodiments of the present invention; and Fig. 3 is a layer structural schematic diagram of a shock absorption layer in embodiments of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and fully described below in combination with the drawings in the embodiments of the present invention. Apparently, the described embodiments are merely part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor will belong to the protection scope of the present invention.

DESCRIPTION With reference to Fig. 1, embodiments of the present invention disclose a shock absorption cable joint for a high-voltage cable, comprising a cable joint body 1, an outer sheath 2 and a non-slipping sleeve 3. The cable joint body 1 is penetrated on the inner side of the outer sheath 2; the non-slipping sleeve 3 is arranged in the middle of the inner side of the outer sheath 2; a plurality of non-slipping rings 4 are arranged on the inner wall of the non-slipping sleeve 3; and the cable joint body 1 penetrates through the non-slipping sleeve 3 and comes into contact with the inner walls of the non-slipping rings 4. Preferably, a bending-resistant spring 5 is also arranged in the outer sheath 2; an opening at one end of the outer sheath 2 is bent inward to form an annular flange 21; a clamping ring 6 is arranged on the inner side of the outer sheath 2 at one end close to the non-slipping sleeve 3; one end of the bending-resistant spring 5 is abutted against the inner side wall of the annular flange 21, and the other end of the bending-resistant spring is abutted against the side wall of the clamping ring 6; and the cable joint body 1 is penetrated on the inner side of the bending-resistant spring 5. The bending-resistant spring 5 is clamped in the outer sheath 2 through the annular flange 21 and the clamping ring 6, and the caliber of the bending-resistant spring is preferably set to be slightly larger than the diameter of the cable joint body 1. In this way, the cable joint body 1 can come into contact with the inner wall of the bending-resistant spring 5 when penetrated in the inner side of the bending-resistant spring 5, so as to achieve better bending resistant performance. In the present embodiment, the outer sheath 2 where the bending-resistant spring 5 is located protrudes outward in an olive shape,

DESCRIPTION thereby leaving enough space for the deformation of the bending-resistant spring 5. Preferably, a sealing gasket 7 is also arranged on one side of the outer sheath 2 having the annular flange 21; the outer side wall of the annular flange 21 is fixedly connected with the sealing gasket 7; and the cable joint body 1 penetrates through the sealing gasket 7 and comes into contact with the inner side wall of the sealing gasket 7. Preferably, the outer sheath 2 is further provided with a sealing gasket cylinder 8 on one side away from the annular flange 21; one end of the sealing gasket cylinder 8 extends into the inner side of the outer sheath 2 and is fixedly connected with the inner side wall of the outer sheath 2; the end part of one end of the sealing gasket cylinder 8 which extends into the outer sheath 2 is abutted against the outer wall of the end part of the non-slipping sleeve 3; the other side of the sealing gasket cylinder 8 extends to the outer side of the outer sheath 2; and the cable joint body 1 penetrates through the sealing gasket cylinder 8 and comes into contact with the inner wall of the sealing gasket cylinder 8. In the present embodiment, the sealing gasket 7 and the sealing gasket cylinder 8 are made of silica gel material; the silica gel gasket 7 is adhesively fixed to the outer side wall of the annular flange 21; and similarly, the sealing gasket cylinder 8 is adhesively fixed to the inner wall of the outer sheath 2. Specifically, with reference to Fig. 2, the cable joint body 1 comprises an inner sheath 11 and a joint cable 12; the inner sheath 11 has a waterproof cavity body 13; the joint cable 12 is penetrated in the waterproof cavity body 13; the waterproof cavity body 13 is filled with waterproof glue; the inner sheath 11 comprises a sealing layer 111, a fireproof layer 112, an insulating layer 113 and a shock absorption layer

DESCRIPTION 114 in sequence from inside to outside; and two adjacent layers are adhesively connected. The cable joint body 1 adopts the form of a traditional joint cable 12 cladded with a protective sleeve. The protective sleeve is used to seal the cable joint body to form a safe and stable joint. In the present embodiment, the focus is on arranging the layer structure of the inner sheath 11. The arrangement of the layer structure ensures the shock absorption performance of the cable joint body 1. Specifically, with reference to Fig. 3, the shock absorption layer 114 comprises an upper wall 1141, shock absorption columns 1142, shock absorption particles 1143, elastic fillers 1144 and a lower wall 1145; the elastic fillers 1144 and the shock absorption particles 1143 are filled between the upper wall 1141 and the lower wall 1145; and the shock absorption columns 1142 are arranged at equal intervals on the inner walls of the upper wall 1141 and the lower wall 1145. The structural arrangement of the shock absorption layer 114 can greatly improve the shock resistant performance of the cable joint body 1 and improve the overall stability of the cable joint. Specifically, the shock absorption particles 1143 are of a core-shell structure of polystyrene, and specifically uses polymethyl methacrylate as a core and polystyrene as a shell. In the present embodiment, the shock absorption columns are formed by fluoroelastomers like miniature springs. Under the impact of the external force, the shock absorption columns are stressed and compressed; and when the external force disappears, the shock absorption columns are restored to the original state. Under the impact of the external force, the shock absorption particles and the elastic filler are deformed. However, because the cores of the shock absorption particles are rigid polymethyl methacrylate balls, only

DESCRIPTION the flexible polystyrene of the shell part is deformed. At the same time, because the shock absorption columns are surrounded by shock absorption gaps without filled material and the shock absorption particles are filled with the elastic fillers, although the layers of the shock absorption particles are staggered and can be squeezed by each other, the deformation rate of the shock absorption particles is still much smaller than that of the shock absorption columns. Therefore, when the cable joint is impacted by the external force, the upper wall, the shock absorption particles, the elastic fillers, the shock absorption columns and the lower wall are used to absorb the shock. The impact force that reaches the center is already very small, and may not impact the cable joint in the center. In the present embodiment, the fireproof layer 112 is a flame-retardant sponge. A good flame retardant function is achieved, and the inner sheath 11 can be light enough. Each embodiment in the description is described in a progressive way. The difference of each embodiment from each other is the focus of explanation. The same and similar parts among all of the embodiments can be referred to each other. For the device disclosed by the embodiments, because the device corresponds to a method disclosed by the embodiments, the device is simply described. Refer to the description of the method part for the related part. The above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Many modifications to these embodiments will be apparent to those skilled in the art. The general principle defined herein can be realized in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these

DESCRIPTION embodiments shown herein, but will conform to the widest scope consistent with the principle and novel features disclosed herein.

Claims

CLAIMS 1. A shock absorption cable joint for a high-voltage cable, comprising a cable joint body (1), an outer sheath (2) and a non-slipping sleeve (3), wherein the cable joint body (1) is penetrated on the inner side of the outer sheath (2); the non-slipping sleeve (3) is arranged in the middle of the inner side of the outer sheath (2); a plurality of non-slipping rings (4) are arranged on the inner wall of the non-slipping sleeve (3); and the cable joint body (1) penetrates through the non-slipping sleeve (3) and comes into contact with the inner walls of the non-slipping rings (4).
2. The shock absorption cable joint for the high-voltage cable according to claim 1, wherein a bending-resistant spring (5) is also arranged in the outer sheath (2); an opening at one end of the outer sheath (2) is bent inward to form an annular flange (21); a clamping ring (6) is arranged on the inner side of the outer sheath (2) at one end close to the non-slipping sleeve (3); one end of the bending-resistant spring (5) is abutted against the inner side wall of the annular flange (21), and the other end of the bending-resistant spring (5) is abutted against the side wall of the clamping ring (6); and the cable joint body (1) is penetrated on the inner side of the bending-resistant spring (5).
3. The shock absorption cable joint for the high-voltage cable according to claim 2, wherein a sealing gasket (7) is also arranged on one side of the outer sheath (2) having the annular flange (21); the outer side wall of the annular flange (21) is fixedly connected with the sealing gasket (7); and the cable joint body (1) penetrates through the sealing gasket (7) and comes into contact with the inner side wall of the sealing gasket (7).
4. The shock absorption cable joint for the high-voltage cable according to claim 2, wherein the outer sheath (2) is further provided with a sealing gasket cylinder (8) on one side away from the annular flange

CLAIMS (21); one end of the sealing gasket cylinder (8) extends into the inner side of the outer sheath (2) and is fixedly connected with the inner side wall of the outer sheath (2); the end part of one end of the sealing gasket cylinder (8) which extends into the outer sheath (2) is abutted against the outer wall of the end part of the non-slipping sleeve (3); the other side of the sealing gasket cylinder (8) extends to the outer side of the outer sheath (2); and the cable joint body (1) penetrates through the sealing gasket cylinder (8) and comes into contact with the inner wall of the sealing gasket cylinder (8).
5. The shock absorption cable joint for the high-voltage cable according to claim 1, wherein the cable joint body (1) comprises an inner sheath (11) and a joint cable (12); the inner sheath (11) has a waterproof cavity body (13); the joint cable (12) is penetrated in the waterproof cavity body (13); the waterproof cavity body (13) is filled with waterproof glue; the inner sheath (11) comprises a sealing layer (111), a fireproof layer (112), an insulating layer (113) and a shock absorption layer (114) in sequence from inside to outside; and two adjacent layers are adhesively connected.
6. The shock absorption cable joint for the high-voltage cable according to claim 5, wherein the shock absorption layer (114) comprises an upper wall (1141), shock absorption columns (1142), shock absorption particles (1143), elastic fillers (1144) and a lower wall (1145); the elastic fillers (1144) and the shock absorption particles (1143) are filled between the upper wall (1141) and the lower wall (1145); and the shock absorption columns (1142) are arranged at equal intervals on the inner walls of the upper wall (1141) and the lower wall (1145).
7. The shock absorption cable joint for the high-voltage cable according to claim 6, wherein the shock absorption particles (1143) are of

CLAIMS a core-shell structure which uses polymethyl methacrylate as a core and polystyrene as a shell.
8. The shock absorption cable joint for the high-voltage cable according to claim 5, wherein the fireproof layer (112) is a flame-retardantsponge.