Cable intermediate joint flame-retardant box

Abstract

The utility model discloses a cable intermediate joint flame-retardant box, which relates to the technical field of cable intermediate joints, and comprises a flame-retardant box main body, the bottom of the inner cavity of the flame-retardant box main body is fixedly connected with an isolation plate, and the top of the isolation plate is provided with a limiting mechanism. When a guiding strip is driven to move along a first limiting piece, the position of a clamping plate can be changed, the use height of a pressing plate can be adjusted by rotating a threaded rod, the cable connector can be limited in the flame-retardant box body through the clamping plate and the pressing plate, the contact area between the interior of the flame-retardant box body and a cable can be increased through a guiding block, and therefore displacement and looseness of the connector can be reduced; the top cover and the flame-retardant box body are convenient to mount and dismount, the sealing cover is convenient to open and close through clamping between the first limiting block and the second limiting block, and the connector can be rapidly overhauled by opening the sealing cover.

Description

Technical Field

[0001] The utility model relates to the technical field of cable intermediate joints, in particular to a flame-retardant box for cable intermediate joints. Background Technique

[0002] The flame-retardant box for cable intermediate joints can completely wrap the cable intermediate joint to form a closed protection space to isolate the potential hazards of the external environment to the cable joint. The flame-retardant box for cable intermediate joints is widely used in cable systems in various industries such as electric power, communication, and transportation, especially in occasions with high requirements for the safety performance of cables, such as substations, data centers, subway tunnels, etc.

[0003] For example, Chinese Patent CN213125565U discloses a flame-retardant and explosion-proof box for cable intermediate joints, which includes an end shell. A shielding layer is embedded in the middle layer of the end shell, and a port sealing groove is processed at one end of the end shell; an extended shell, a shielding layer is also embedded in the middle layer of the extended shell. The extended shell is located between two end shells, and the end shell and the extended shell are connected by a flange. A flange sealing groove is provided inside the flange. The end shell includes an upper shell and a lower shell that are buckled and connected to each other. Both the upper shell and the lower shell are connected by threaded holes through rib plates. The extended shell includes an upper extended shell and a lower extended shell that are buckled and connected to each other. Both the upper extended shell and the lower extended shell are connected by threaded holes through rib plates.

[0004] In the above patent, although the problem of the cable joint being easily invaded by moisture is solved by winding a film and a sealing strip, there is no limiting structure for the joint inside the box body. The cable intermediate joint is prone to displacement after being subjected to an external force inside the box body, and the joint is prone to damage when it collides with the inner wall of the box body after displacement. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that there is no limiting structure for the joint inside the box body in the prior art. The cable intermediate joint is prone to displacement after being subjected to an external force inside the box body, and the joint is prone to damage when it collides with the inner wall of the box body after displacement, and a flame-retardant box for cable intermediate joints is proposed.

[0006] To achieve the above object, the utility model adopts the following technical solution: A flame-retardant box for a cable intermediate joint, comprising a flame-retardant box body. A partition board is fixedly connected to the bottom of the inner cavity of the flame-retardant box body. A limiting mechanism is arranged on the top of the partition board. The limiting mechanism includes a first limiting member, a clamping plate and a pressing plate. A second limiting member is clamped at the bottom of the first limiting member. The bottom of the second limiting member is fixedly connected to the partition board. A spring is installed on one side of the inner wall of the second limiting member. One end of the spring is connected to the clamping plate. A guiding bar is fixedly connected to the top of the clamping plate. The top of the guiding bar penetrates through the first limiting member and is slidably connected between the first limiting members. A threaded rod is inserted through the first limiting member. The threaded rod is threadedly connected to the pressing plate. The bottom of the threaded rod is rotatably connected to an L-shaped bar. The top of the L-shaped bar is fixedly connected to the inner wall of the first limiting member.

[0007] Preferably, the threaded rod is rotatably connected to the first limiting member, and the first limiting member is slidably connected to the top of the pressing plate.

[0008] Preferably, a backing plate is fixedly connected to the top of the partition board. A guiding block is lapped on one side of the backing plate. An insertion hole is formed on one side of the guiding block.

[0009] Preferably, the bottom of the guiding block is snap-fitted to the partition board. An extension plate is fixedly connected to the top of the guiding block. The top of the extension plate is lapped on one side of the sealing cover.

[0010] Preferably, a support rod is fixedly connected to the bottom of the inner cavity of the flame-retardant box body. A top cover is snap-fitted to the top of the support rod. One side of the top cover is lapped on the flame-retardant box body. The top cover and the flame-retardant box body are threadedly connected with a limiting bolt.

[0011] Preferably, a sealing ring is fixedly connected to one side of the inner wall of the flame-retardant box body. The sealing cover is lapped on the top of the sealing ring. One side of the sealing cover is rotatably connected to the top cover.

[0012] Preferably, a first limiting block is rotatably connected to one side of the sealing cover. A second limiting block is snap-fitted to one side of the first limiting block. One side of the second limiting block is fixedly connected to the flame-retardant box body.

[0013] Preferably, an extension sleeve is threadedly connected to one side of the flame-retardant box body. A cable is inserted through the extension sleeve.

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

[0015] 1. In the present utility model, the two ends of a spring can be respectively connected to a second limiting member and a clamping plate. When driving the guiding strip to move along the first limiting member, the position of the clamping plate can be changed. Rotating the threaded rod can adjust the use height of the pressing plate. The clamping plate and the pressing plate can be used to limit the cable joint inside the main body of the flame retardant box. The guiding block can increase the contact area between the inside of the main body of the flame retardant box and the cable, thereby reducing the displacement and loosening of the joint, and further reducing the collision damage of the joint.

[0016] 2. In the present utility model, the bottom of the support rod is fixedly connected to the inner wall of the main body of the flame retardant box, and the top is engaged with the top cover. The support rod can support the inner wall of the main body of the flame retardant box, reducing the deformation generated when the main body of the flame retardant box is impacted by an external force. The top cover is convenient for installation and disassembly with the main body of the flame retardant box. The engagement between the first limiting block and the second limiting block facilitates the opening and closing of the sealing cover. By opening the sealing cover, the joint can be quickly repaired without disassembling the whole flame retardant box, and the operation is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the sealing cover of a flame retardant box for a cable intermediate joint proposed by the present utility model;

[0018] Figure 2 It is a schematic installation diagram of the second limiting block structure of a flame retardant box for a cable intermediate joint proposed by the present utility model;

[0019] Figure 3 It is a schematic installation diagram of the sealing ring structure of a flame retardant box for a cable intermediate joint proposed by the present utility model;

[0020] Figure 4 It is a schematic diagram of the guiding strip structure of a flame retardant box for a cable intermediate joint proposed by the present utility model;

[0021] Figure 5 It is a schematic installation diagram of the pressing plate structure of a flame retardant box for a cable intermediate joint proposed by the present utility model.

[0022] Legend: 1. Sealing cover; 2. Top cover; 3. Extension sleeve; 4. Main body of the flame retardant box; 5. First limiting block; 6. First limiting member; 7. Second limiting block; 8. Limiting bolt; 9. Sealing ring; 10. Extension plate; 11. Support rod; 12. Guiding strip; 13. Padding plate; 14. Second limiting member; 15. Partition plate; 16. Threaded rod; 17. Guiding block; 18. Spring; 19. Clamping plate; 20. L-shaped strip; 21. Pressing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model 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 can be combined with each other.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also 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.

[0025] Embodiment 1: Refer to Figure 1 - Figure 5 As shown in the figure: A flame-retardant box for a cable intermediate joint includes a flame-retardant box main body 4. A partition plate 15 is fixedly connected to the bottom of the inner cavity of the flame-retardant box main body 4. A limiting mechanism is arranged on the top of the partition plate 15. The limiting mechanism includes a first limiting member 6, a clamping plate 19, and a pressing plate 21. A second limiting member 14 is clamped at the bottom of the first limiting member 6. The bottom of the second limiting member 14 is fixedly connected to the partition plate 15. A spring 18 is installed on one side of the inner wall of the second limiting member 14. One end of the spring 18 is connected to the clamping plate 19. A guiding strip 12 is fixedly connected to the top of the clamping plate 19. The top of the guiding strip 12 penetrates through the first limiting member 6 and is slidably connected between the first limiting members 6. A threaded rod 16 is inserted through the first limiting member 6. The threaded rod 16 is threadedly connected to the pressing plate 21. The bottom of the threaded rod 16 is rotatably connected to an L-shaped strip 20. The top of the L-shaped strip 20 is fixedly connected to the inner wall of the first limiting member 6.

[0026] The threaded rod 16 is rotatably connected to the first limiting member 6. The first limiting member 6 is slidably connected between the top of the pressing plate 21. A cushion plate 13 is fixedly connected to the top of the partition plate 15. A guiding block 17 is lapped on one side of the cushion plate 13. An insertion hole is opened on one side of the guiding block 17. The bottom of the guiding block 17 is snap-fitted to the partition plate 15. An extension plate 10 is fixedly connected to the top of the guiding block 17. The top of the extension plate 10 is lapped with one side of the sealing cover 1.

[0027] The partition plate 15 can support the bottom of the second limiting member 14 and the guiding block 17, and can also isolate the bottom of the second limiting member 14 and the guiding block 17 from the inner wall of the flame-retardant box main body 4. The clamping of the second limiting member 14 and the first limiting member 6 facilitates the installation and disassembly of the first limiting member 6 on the top of the second limiting member 14. At the same time, the first limiting member 6 can guide the movement of the guiding strip 12, thereby improving the stability of the clamping plate 19 during movement. The position adjustment of the clamping plate 19 can be realized by the compression or elongation of the spring 18. Thus, the two sides of the cable joint are limited by the symmetrically arranged clamping plates 19, reducing the offset of the joint. Through the connection between the L-shaped strip 20 and the inner wall of the first limiting member 6, the first limiting member 6 can be used to reinforce the L-shaped strip 20. The L-shaped strip 20 can support the bottom of the threaded rod 16, facilitating the stable rotation of the threaded rod 16. By rotating the threaded rod 16, the use height of the pressing plate 21 is adjusted, and then the top of the joint is pressed and limited by the pressing plate 21, improving the limiting effect on the joint;

[0028] Meanwhile, the first limiting member 6 can guide the lifting of the pressing plate 21, the cushion plate 13 can support the bottom of the cable, and the side wall of the insertion hole of the guiding block 17 contacts the outer ring surface of the cable, which can increase the contact area between the inside of the flame retardant box body 4 and the cable, thereby improving the stability during cable installation, reducing the looseness of the cable, and using the pressing of the sealing cover 1 on the extension plate 10 can improve the limiting effect of the guiding block 17 on the cable.

[0029] Embodiment 2: As Figure 1 - Figure 4 shown, a support rod 11 is fixedly connected to the bottom of the inner cavity of the flame retardant box body 4. The top of the support rod 11 is engaged with a top cover 2. One side of the top cover 2 is lapped with the flame retardant box body 4. The top cover 2 and the flame retardant box body 4 are connected by a limiting bolt 8 in a threaded manner. One side of the inner wall of the flame retardant box body 4 is fixedly connected with a sealing ring 9. The top of the sealing ring 9 is lapped with a sealing cover 1. One side of the sealing cover 1 is rotatably connected with the top cover 2. One side of the sealing cover 1 is rotatably connected with a first limiting block 5. One side of the first limiting block 5 is engaged with a second limiting block 7. One side of the second limiting block 7 is fixedly connected with the flame retardant box body 4. One side of the flame retardant box body 4 is connected with an extension sleeve 3 in a threaded manner. A cable is inserted through the inside of the extension sleeve 3.

[0030] The engagement between the top of the support rod 11 and the top cover 2 can assist in connecting the flame retardant box body 4 and the top cover 2, reducing the misalignment and position deviation when the top cover 2 and the flame retardant box body 4 are connected by the limiting bolt 8, thereby realizing the support and reinforcement between the flame retardant box body 4 and the top cover 2, improving the strength inside the flame retardant box body 4, and improving the protection effect of the flame retardant box body 4 on the cable intermediate joint. Through the rotational connection between the sealing cover 1 and the top cover 2, it is convenient to open and close the sealing cover 1 on the top of the flame retardant box body 4. Through the engagement between the first limiting block 5 and the second limiting block 7, the closing position of the sealing cover 1 can be limited, thereby locking the position of the sealing cover 1 and enabling the sealing cover 1 to shield and protect the top of the flame retardant box body 4.

[0031] Usage method and working principle of this device: First, pass the cable through the through holes on both sides of the flame-retardant box body 4, and pass the cable middle joint through the second limiting member 14. Loosen the two guiding strips 12, and the spring 18 drives the clamping plate 19 to reset. One side of the clamping plate 19 is lapped with the outer ring surface of the joint, limiting both sides of the joint. Then, rotate the two threaded rods 16 on the top of the first limiting member 6. Under the action of the thread, the pressing plate 21 moves downward to press the top of the joint. At this time, the bottom of the joint is lapped with the inner wall of the second limiting member 14. Clamp the guiding block 17 on the top of the isolation plate 15, and then connect the sealing cover 1 and the flame-retardant box body 4 through the limiting bolt 8. At this time, the bottom of the top cover 2 is clamped with the support rod 11, and the top cover 2 exerts a downward force on the extension plate 10. Then, sleeve the two extension sleeves 3 on the outside of the cable, and then rotate the extension sleeve 3 to connect the end of the extension sleeve 3 with the flame-retardant box body 4. Rotate the first limiting block 5 so that one side of the first limiting block 5 is clamped with the second limiting block 7. When it is necessary to repair the cable joint, just rotate the first limiting block 5 to separate the first limiting block 5 from the second limiting block 7, and then rotate the sealing cover 1 to expose the first limiting member 6 and the second limiting member 14. After separating the bottom of the first limiting member 6 from the second limiting member 14, the cable joint can be quickly repaired. Among them, flame-retardant coatings are provided on both the inner and outer sides of the flame-retardant box body 4, and the isolation plate 15 contains a number of basalt fibers, with good flame-retardant effect.

[0032] The above is only the preferred embodiment of the present invention, and it is not a limitation of 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 belong to the protection scope of the technical solution of the present invention.

Claims

1. A flame retardant box for a cable intermediate joint, comprising a flame retardant box body (4), wherein an isolation plate (15) is fixedly connected to the bottom of the inner cavity of the flame retardant box body (4), characterized in that: A limiting mechanism is arranged at the top of the isolation plate (15), and the limiting mechanism comprises a limiting member 1 (6), a clamping plate (19) and a pressing plate (21); the limiting member 1 (6) is engaged with the limiting member 2 (14) at the bottom; the limiting member 2 (14) is fixedly connected to the isolation plate (15) at the bottom; a spring (18) is installed on one side of the inner wall of the limiting member 2 (14); one end of the spring (18) is connected to the clamping plate (19); a guide bar (12) is fixedly connected to the top of the clamping plate (19); the top of the guide bar (12) passes through the limiting member 1 (6) and is slidably connected to the limiting member 1 (6); a threaded rod (16) is inserted into the inside of the limiting member 1 (6); the threaded rod (16) is connected to the pressing plate (21) by a thread; the bottom of the threaded rod (16) is rotatably connected to an L-shaped bar (20); the top of the L-shaped bar (20) is fixedly connected to the inner wall of the limiting member 1 (6).

2. The cable intermediate joint flame retardant box according to claim 1, characterized in that: The threaded rod (16) is rotationally connected to the limiting member 1 (6), and the limiting member 1 (6) is slidingly connected to the top of the pressing plate (21).

3. The flame retardant box for cable intermediate joints according to claim 1, characterized in that: A pad (13) is fixedly connected to the top of the isolation plate (15), a guide block (17) is overlapped on one side of the pad (13), and an insertion hole is opened on one side of the guide block (17).

4. The cable intermediate joint flame retardant box according to claim 3, characterized in that: The bottom of the guide block (17) is snap-connected with the isolation plate (15), the top of the guide block (17) is fixedly connected with an extension plate (10), and the top of the extension plate (10) overlaps with one side of the sealing cover (1).

5. The flame retardant box for cable intermediate joints according to claim 1, characterized in that: A support rod (11) is fixedly connected to the bottom of the inner cavity of the flame retardant box body (4); a top cover (2) is engaged with the top of the support rod (11); one side of the top cover (2) overlaps the flame retardant box body (4); and the top cover (2) and the flame retardant box body (4) are connected by a limit bolt (8) via threads.

6. The cable intermediate joint flame retardant box according to claim 3, characterized in that: A sealing ring (9) is fixedly connected to one side of the inner wall of the flame retardant box body (4), a sealing cover (1) is overlapped on the top of the sealing ring (9), and one side of the sealing cover (1) is rotatably connected to the top cover (2).

7. The flame retardant box for cable intermediate joints according to claim 6, characterized in that: One side of the sealing cover (1) is rotatably connected to a limiting block one (5), one side of the limiting block one (5) is engaged with a limiting block two (7), and one side of the limiting block two (7) is fixedly connected to the flame retardant box body (4).

8. The flame retardant box for cable intermediate joints according to claim 1, characterized in that: One side of the flame retardant box body (4) is connected to an extension sleeve (3) via a thread, and a cable is inserted through the interior of the extension sleeve (3).

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