Explosion-proof shell of cable intermediate joint

Abstract

The utility model discloses a cable intermediate joint explosion-proof housing, relates to the cable joint technology field, and comprises a cable joint, the cable joint is externally provided with a mounting mechanism, in the utility model, pressure moves outwards through a pressure relief pipe, a pressure relief filter screen, a sealing plug and a cover plate are pushed outwards, a first spring is compressed, and the cable intermediate joint explosion-proof housing is formed. Gas is discharged through a pressure relief filter screen, and when secondary pressure is increased in the pressure relief process, the pressure relief filter screen is continuously pushed towards the outside of the pressure relief pipe, and a second spring is compressed, so that the pressure relief range is enlarged, and secondary explosion caused by excessive pressure of the first outer shell and the interior is prevented; a second connecting block and a first connecting block are fixed through a second fixing bolt, a first outer shell and a second outer shell are installed outside the cable connector, explosion generated by the cable connector is blocked in the first outer shell and the second outer shell, flame retardance can be conducted on the explosion generated by the cable connector by arranging a flame-retardant lantern ring, and the explosion-proof performance of the cable connector is improved. And the situation of fire disasters caused by explosion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cable joints, in particular to an explosion-proof housing for a cable intermediate joint. Background Art

[0002] An intermediate joint generally refers to a cable joint in the middle part of a cable line. The intermediate joint is a cable accessory used for the intermediate connection of cross-linked cables or oil-immersed cables of various voltage levels. In order to protect the intermediate joint, an explosion-proof housing needs to be installed at the intermediate joint.

[0003] For example, the explosion-proof housing for an intermediate joint disclosed in the publication number CN212811258U includes a first base block and a second base block. At the middle positions of the outer side walls of the first base block and the second base block that are far away from each other, a first cable pipe and a second cable pipe are respectively vertically welded. And sliding cavities are opened between the inner parts and one side wall positions of the first base block and the second base block that are close to each other. The first base block and the second base block are both movably installed with aluminum alloy blocks through the sliding cavities. Sealing clay layers are fixedly installed on the inner surfaces of the first base block and the second base block, and the sealing clay layers cover the outer surface positions of the aluminum alloy blocks. Positioning grooves are respectively opened at the positions of the side walls of the two groups of aluminum alloy blocks that are close to each other, and filling blocks are welded.

[0004] In the prior art, since the intermediate joint is a weak part of the cable, when an explosion occurs at the intermediate joint, pressure will be generated inside the explosion-proof housing, causing an internal and external air pressure difference. If the gas is not discharged in time, it is easy to cause a secondary explosion, thus affecting the safety performance of the cable. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem in the prior art that the gas inside the explosion-proof housing cannot be discharged in time, which is easy to cause a secondary explosion inside the explosion-proof housing, and to propose an explosion-proof housing for a cable intermediate joint.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: An explosion-proof housing for a cable intermediate joint includes a cable joint. An installation mechanism is installed outside the cable joint. The installation mechanism includes a first outer housing and a second outer housing. A pressure relief mechanism is installed on the outer surface of the first outer housing. The pressure relief mechanism includes a pressure relief pipe. One end of the pressure relief pipe is fixedly communicated with the outer surface of the first outer housing. A pressure relief filter screen is sleeved inside the pressure relief pipe. One end of the pressure relief filter screen is fixedly connected with a sealing plug. One end of the sealing plug is fixedly connected with a cover plate. One end of the cover plate is fixedly connected with a connecting frame. Both ends of the connecting frame are slidably connected with support frames. A sleeve block is fixedly connected to the outside of the support frames. A first spring is arranged between the connecting frame and the sleeve block. The first spring is sleeved on the outside of the support frames.

[0007] Preferably, an installation groove is formed on the outer surface of the first housing body. One end of the installation groove is fixedly connected with an installation block, and the middle part of the installation block is slidably connected with the outside of the support frame.

[0008] Preferably, the end part of the support frame is arranged inside the installation groove, and a moving block is fixedly connected to the end part of the support frame.

[0009] Preferably, a second spring is arranged between the moving block and the installation block, and the second spring is sleeved on the outside of the support frame.

[0010] Preferably, second connection blocks are fixedly connected to both ends of the first housing body, first connection blocks are fixedly connected to both ends of the second housing body, and a second fixing bolt is installed between the second connection block and the first connection block.

[0011] Preferably, a sealing gasket is fixedly connected to one side of the first connection block.

[0012] Preferably, a flame-retardant collar is installed outside the cable connector. Clamping blocks are clamped on both outer sides of the flame-retardant collar. The clamping blocks are divided into two groups, and the two groups of clamping blocks are respectively fixedly connected to the inner ring surface of the first housing body and the inner ring surface of the second housing body.

[0013] Preferably, sealing assemblies are fixedly connected to both ends of the cable connector. One end of the sealing assembly is attached to one end of the first housing body, and a first fixing bolt is installed between the sealing assembly and the first housing body.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] 1. In the present utility model, pressure moves outward through the pressure relief pipe, pushing the pressure relief filter screen, the sealing plug and the cover plate outward. The first spring is compressed, and gas is discharged through the pressure relief filter screen. When the secondary pressure increases during the pressure relief process, the pressure relief filter screen is further pushed outside the pressure relief pipe, the end part of the support frame moves outside the installation groove, and the second spring is compressed, thereby increasing the pressure relief range, facilitating the rapid discharge of the pressure inside the first housing body and the second housing body, and preventing secondary explosion caused by excessive internal pressure of the first housing body.

[0016] 2. In the present utility model, the second connection block and the first connection block are fixed by the second fixing bolt, and the first housing body and the second housing body are installed outside the cable connector. The explosion generated by the cable connector is blocked inside the first housing body and the second housing body. By providing a flame-retardant collar, the explosion generated by the cable connector can be flame-retarded, reducing the occurrence of fire caused by the explosion. Description of the Drawings

[0017] Figure 1The present utility model provides a three-dimensional structural schematic diagram of an explosion-proof housing for a cable intermediate joint;

[0018] Figure 2 The present utility model provides a disassembled structural schematic diagram of an explosion-proof housing for a cable intermediate joint;

[0019] Figure 3 The present utility model provides a Figure 2 partial enlarged structural schematic diagram at position A of an explosion-proof housing for a cable intermediate joint;

[0020] Figure 4 The present utility model provides a disassembled structural schematic diagram of a pressure relief mechanism of an explosion-proof housing for a cable intermediate joint.

[0021] Legend: 1. Cable joint; 2. Pressure relief mechanism; 21. Pressure relief pipe; 22. Installation groove; 23. Moving block; 24. Connecting frame; 25. Support frame; 26. Socketing block; 27. First spring; 28. Second spring; 29. Pressure relief filter screen; 210. Sealing plug; 211. Installation block; 212. Cover plate; 3. Installation mechanism; 31. First outer housing; 32. Sealing assembly; 33. First fixing bolt; 34. Second outer housing; 35. Clamping block; 36. First connecting block; 37. Sealing gasket; 38. Second connecting block; 39. Second fixing bolt; 310. Flame retardant collar. Detailed implementation manners

[0022] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0024] Embodiment 1: As Figure 1 - Figure 4As shown in the figure, the utility model provides an explosion-proof housing for a cable intermediate joint, which includes a cable joint 1. An installation mechanism 3 is installed outside the cable joint 1. The installation mechanism 3 includes a first outer housing 31 and a second outer housing 34. A pressure relief mechanism 2 is installed on the outer surface of the first outer housing 31. The pressure relief mechanism 2 includes a pressure relief pipe 21. One end of the pressure relief pipe 21 is fixedly communicated with the outer surface of the first outer housing 31. A pressure relief filter screen 29 is sleeved inside the pressure relief pipe 21. One end of the pressure relief filter screen 29 is fixedly connected with a sealing plug 210. One end of the sealing plug 210 is fixedly connected with a cover plate 212. One end of the cover plate 212 is fixedly connected with a connecting frame 24. Both ends of the connecting frame 24 are slidably connected with a support frame 25. A sleeve block 26 is fixedly connected to the outside of the support frame 25. A first spring 27 is arranged between the connecting frame 24 and the sleeve block 26. The first spring 27 is sleeved outside the support frame 25. An installation groove 22 is opened on the outer surface of the first outer housing 31. One end of the installation groove 22 is fixedly connected with an installation block 211. The middle part of the installation block 211 is slidably connected with the outside of the support frame 25. The end of the support frame 25 is arranged inside the installation groove 22. The end of the support frame 25 is fixedly connected with a moving block 23. A second spring 28 is arranged between the moving block 23 and the installation block 211. The second spring 28 is sleeved outside the support frame 25.

[0025] When an explosion occurs at the cable joint 1, resulting in a large pressure in the inner cavities of the first outer housing 31 and the second outer housing 34, the gas moves outward through the pressure relief pipe 21, pushing the pressure relief filter screen 29, the sealing plug 210 and the cover plate 212 outward. The connecting frame 24 slides outside the support frame 25, and the first spring 27 is compressed. When the pressure relief filter screen 29 moves to contact the outside world, the gas is discharged through a plurality of filter holes opened on the pressure relief filter screen 29. At the same time, by setting the pressure relief filter screen 29, other impurities inside the first outer housing 31 and the second outer housing 34 can be prevented from spraying out with the gas. When the secondary pressure increases during the pressure relief process, the pressure relief filter screen 29 is further pushed outside the pressure relief pipe 21, and the end of the support frame 25 moves outside the installation groove 22, and the second spring 28 is compressed, thereby increasing the pressure relief range and facilitating the rapid discharge of the pressure inside the first outer housing 31 and the second outer housing 34, preventing secondary explosion caused by excessive pressure inside the first outer housing 31 and the second outer housing 34. After the pressure relief is completed, the elastic forces of the first spring 27 and the second spring 28 can drive the pressure relief filter screen 29 and the sealing plug 210 to move into the pressure relief pipe 21, and the sealing plug 210 seals the pressure relief pipe 21.

[0026] Embodiment 2: As Figure 1 and Figure 2As shown in the figure, two ends of the first outer casing 31 are fixedly connected with second connection blocks 38, two ends of the second outer casing 34 are fixedly connected with first connection blocks 36, and a second fixing bolt 39 is installed between the second connection block 38 and the first connection block 36; a sealing gasket 37 is fixedly connected to one side of the first connection block 36; a flame-retardant collar 310 is installed outside the cable connector 1, and clamping blocks 35 are clamped on both outer sides of the flame-retardant collar 310. The clamping blocks 35 are divided into two groups, and the two groups of clamping blocks 35 are respectively fixedly connected to the inner ring surfaces of the first outer casing 31 and the second outer casing 34; sealing assemblies 32 are fixedly connected to both ends of the cable connector 1, one end of the sealing assembly 32 is attached to one end of the first outer casing 31, and a first fixing bolt 33 is installed between the sealing assembly 32 and the first outer casing 31.

[0027] The second connection block 38 and the first connection block 36 are fixed by the second fixing bolt 39, so as to install the first outer casing 31 and the second outer casing 34 outside the cable connector 1. Sealing gaskets 37 are fixedly installed at the contact positions of the first connection block 36 and the second connection block 38, which can improve the sealing performance inside the first outer casing 31 and the second outer casing 34, block the explosion generated by the cable connector 1 inside the first outer casing 31 and the second outer casing 34, and prevent the explosion from spreading to cause damage to other parts. At the same time, sealing assemblies 32 are fixedly connected to both ends of the first outer casing 31 and the second outer casing 34 through first fixing bolts 33. The sealing assembly 32 is composed of a sealing ring and a mounting frame sleeved on the outer surface of the sealing ring. The sealing assembly 32 can improve the sealing performance of the connection between the end of the first outer casing 31, the end of the second outer casing 34 and the cable connector 1. A flame-retardant collar 310 is installed outside the cable connector 1. The flame-retardant collar 310 is respectively clamped on the inner ring surfaces of the first outer casing 31 and the second outer casing 34 through the clamping blocks 35, which can retard the explosion generated by the cable connector 1 and reduce the occurrence of fire caused by the explosion.

[0028] Usage method and working principle of this device: The second connecting block 38 and the first connecting block 36 are fixed by the second fixing bolt 39, so as to install the first outer casing 31 and the second outer casing 34 outside the cable joint 1. Sealing gaskets 37 are fixed at the contact positions of the first connecting block 36 and the second connecting block 38, which can improve the sealing performance inside the first outer casing 31 and the second outer casing 34. Sealing components 32 are fixedly connected at both ends of the first outer casing 31 and the second outer casing 34 by the first fixing bolts 33, which can improve the sealing performance of the connection between the end of the first outer casing 31, the end of the second outer casing 34 and the cable joint 1. A flame-retardant collar 310 is installed outside the cable joint 1. The flame-retardant collar 310 is respectively clamped on the inner ring surfaces of the first outer casing 31 and the second outer casing 34 through the clamping blocks 35, which can retard the flame of the explosion generated by the cable joint 1. When an explosion occurs at the cable joint 1, resulting in a large pressure in the inner cavities of the first outer casing 31 and the second outer casing 34, the pressure moves outward through the pressure relief pipe 21, pushing the pressure relief filter screen 29, the sealing plug 210 and the cover plate 212 outward. The first spring 27 is compressed, and the gas is discharged through the pressure relief filter screen 29. At the same time, other impurities can be prevented from spraying out with the gas. When the pressure relief filter screen 29 is further pushed to the outside of the pressure relief pipe 21, the end of the support frame 25 moves to the outside of the installation groove 22, and the second spring 28 is compressed, thereby increasing the range of pressure relief. After the pressure relief is completed, the elastic forces of the first spring 27 and the second spring 28 drive the pressure relief filter screen 29 and the sealing plug 210 to move into the pressure relief pipe 21, and the sealing plug 210 seals the pressure relief pipe 21.

[0029] The above is only the preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An explosion-proof housing for a cable intermediate joint, comprising a cable joint (1), characterized in that: The cable connector (1) is provided with an installation mechanism (3) on the outside, the installation mechanism (3) comprising a first outer shell (31) and a second outer shell (34), the outer surface of the first outer shell (31) being provided with a pressure relief mechanism (2), the pressure relief mechanism (2) comprising a pressure relief pipe (21), one end of the pressure relief pipe (21) being fixedly connected to the outer surface of the first outer shell (31), the interior of the pressure relief pipe (21) being sleeved with a pressure relief filter (29), one end of the pressure relief filter (29) being fixedly connected to the outer surface of the first outer shell (31), A sealing plug (210) is fixedly connected to one end of the sealing plug (210), a cover plate (212) is fixedly connected to one end of the cover plate (212), a connecting frame (24) is fixedly connected to one end of the connecting frame (24), both ends of the connecting frame (24) are slidably connected to a support frame (25), the outside of the support frame (25) is fixedly connected to a sleeve block (26), a first spring (27) is provided between the connecting frame (24) and the sleeve block (26), and the first spring (27) is sleeved on the outside of the support frame (25).

2. The explosion-proof housing for a cable intermediate joint according to claim 1, characterized in that: The outer surface of the first outer shell (31) is provided with a mounting groove (22), one end of the mounting groove (22) is fixedly connected to a mounting block (211), and the middle part of the mounting block (211) is slidably connected to the outside of the support frame (25).

3. The explosion-proof housing for a cable intermediate joint according to claim 1, characterized in that: The end of the support frame (25) is arranged inside the mounting groove (22), and the end of the support frame (25) is fixedly connected to a moving block (23).

4. The explosion-proof housing for a cable intermediate joint according to claim 3, characterized in that: A second spring (28) is provided between the moving block (23) and the mounting block (211), and the second spring (28) is sleeved on the outside of the support frame (25).

5. The explosion-proof housing for a cable intermediate joint according to claim 1, characterized in that: The two ends of the first outer shell (31) are fixedly connected with second connection blocks (38), the two ends of the second outer shell (34) are fixedly connected with first connection blocks (36), and a second fixing bolt (39) is installed between the second connection block (38) and the first connection block (36).

6. The explosion-proof housing for a cable intermediate joint according to claim 5, characterized in that: A sealing gasket (37) is fixedly connected to one side of the first connecting block (36).

7. The explosion-proof housing for a cable intermediate joint according to claim 1, characterized in that: A flame retardant collar (310) is installed on the outside of the cable connector (1), and clamping blocks (35) are clamped on both sides of the outside of the flame retardant collar (310). The clamping blocks (35) are divided into two groups, and the two groups of clamping blocks (35) are respectively fixedly connected to the inner annular surface of the first outer shell (31) and the inner annular surface of the second outer shell (34).

8. The explosion-proof housing for a cable intermediate joint according to claim 1, characterized in that: Both ends of the cable connector (1) are fixedly connected with sealing components (32), one end of the sealing component (32) is in contact with one end of the first outer shell (31), and a first fixing bolt (33) is installed between the sealing component (32) and the first outer shell (31).

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