An explosion-proof box for cable intermediate joint

Abstract

The utility model discloses a cable intermediate joint explosion -proof box, including lower casing, the lower casing upper end is equipped with the upper casing, the lower casing is equipped with the lower fixed plate with the upper casing cooperation, the lower casing both ends are equipped with the lower fixed plate, the upper casing both ends are equipped with the upper fixed plate, the upper fixed plate lower extreme is equipped with fixed plug, be equipped with the chuck on the fixed plug, be equipped with fixed slot on the lower fixed plate, be equipped with the limiting panel of slide connection in the fixed slot, the limiting panel is equipped with the chuck cooperation, the lower casing both ends are equipped with the extension frame, the extension frame outer end is equipped with the fixed ring, the fixed ring top is equipped with the pressure ring, the pressure ring both sides are equipped with the mounting hole, be equipped with the compression bolt in the mounting hole, the fixed ring both ends are equipped with the fixed hole, the fixed hole is equipped with the compression bolt cooperation, this equipment dismouting maintenance is more convenient, and installation is more stable, improves the protection ability to cable, and the worker uses conveniently.

Description

Technical Field

[0001] This utility model relates to the field of power engineering technology, and more specifically, it relates to an explosion-proof box for cable intermediate joints. Background Technology

[0002] In urban construction, a large number of cables and wires are installed to transmit electricity and signals. When laying cables, because the length of a single cable is limited, multiple cables need to be connected and coordinated to meet the needs of cable laying. In order to ensure the stability of cable joints, explosion-proof boxes are usually installed to protect the weak joints in the middle of the cable.

[0003] Most common explosion-proof junction boxes have a simple structure. During assembly, bolts are used for connection and fixation. With long-term use of the cables, maintenance may be required. This necessitates removing the bolts from the bolt holes, requiring workers to use tools to rotate each bolt individually, which is cumbersome and time-consuming, hindering maintenance work. Furthermore, after installation, the ends of the explosion-proof box are typically secured to the cables with tape. This simple fixing structure is prone to loosening and requires installation after the box is in place. Without proper positioning during installation, the cables are in a free state. If relative movement occurs, the connector may experience significant tension, affecting the cable connection and equipment performance, making it difficult for operators to use. Additionally, most common explosion-proof boxes have only a single layer. In the event of an explosion at the cable connection, the impact directly contacts the casing, potentially causing damage and breakage. In this case, the explosion-proof box not only loses its protective capability but also becomes difficult to replace. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides an explosion-proof box for cable intermediate joints, so as to solve the technical problem mentioned in the background art that the explosion-proof box for cable joints has a simple structure and is inconvenient to use.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof box for cable intermediate joints, comprising a lower housing, an upper housing at the upper end of the lower housing, the lower housing cooperating with the upper housing, lower fixing plates at both ends of the lower housing, upper fixing plates at both ends of the upper housing, a fixing block at the lower end of the upper fixing plate, a clip on the fixing block, a fixing slot on the lower fixing plate, a limiting plate slidably connected in the fixing slot, the limiting plate cooperating with the clip;

[0008] The lower housing is provided with extension frames at both ends, and a fixing ring is provided at the outer end of the extension frame. A pressure ring is provided above the fixing ring. Mounting holes are provided on both sides of the pressure ring, and clamping bolts are provided in the mounting holes. Fixing holes are provided at both ends of the fixing ring, and the fixing holes cooperate with the clamping bolts.

[0009] The present invention is further configured such that loading grooves are provided on the inner sides of both the lower shell and the upper shell, and a left explosion-proof arc plate and a right explosion-proof arc plate are respectively provided in the loading grooves. The left explosion-proof arc plate and the right explosion-proof arc plate cooperate with each other to enrich the reinforcement structure.

[0010] The present invention is further configured such that positioning plates are provided on the side ends of the left and right explosion-proof arc plates, positioning holes are provided on the positioning plates, and positioning posts are provided in the loading groove. The positioning posts cooperate with the positioning holes to keep the explosion-proof arc plates stable inside the shell.

[0011] The present invention is further configured such that a storage groove is provided in the fixed slot, the limiting plate slides in cooperation with the storage groove, and a pressure spring is provided in the storage groove to facilitate the movement of the limiting plate.

[0012] The present invention is further configured such that an operation port is provided at the lower end of the lower fixing plate, the operation port is connected to the storage groove, a linkage block is slidably connected in the operation port, one end of the linkage block is connected to the limiting plate, and the other end is provided with a control plate, and multiple linkage blocks are connected to a control plate for convenient control.

[0013] The present invention is further configured such that the upper end of the card head is provided with a pressure-applying inclined surface, and the front end of the limiting plate is provided with a pressure-receiving inclined head. The pressure-receiving inclined head cooperates with the pressure-applying inclined surface to facilitate the insertion of the fixing block.

[0014] The present invention is further configured such that an adjusting bolt is provided above the pressure ring, and a pressure block is rotatably connected to the lower end of the adjusting bolt. A fitting pad is provided at the lower end of the pressure block for further fixation.

[0015] The present invention is further configured such that a guide post is provided at the upper end of the pressure block, and the guide post slides in conjunction with the pressure ring to ensure stable movement.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides an explosion-proof box for cable intermediate joints, which has the following beneficial effects:

[0018] 1. The explosion-proof box is formed by the cooperation of the upper and lower shells. The installation structure is provided by the cooperation of the lower fixing plate, upper fixing plate, fixing block, clip, fixing slot and limiting plate. The plug-in structure replaces the original bolt structure for fixing. When the worker disassembles and assembles the shell, he only needs to pull and plug it in through the cooperation of the operating port, the linkage block and the control plate. There is no need to use tools to rotate multiple bolt parts, which makes the work more convenient and improves the efficiency.

[0019] 2. Support is provided by the cooperation of the extension frame and the fixing ring, and the installation structure is provided by the cooperation of the mounting holes, clamping bolts and fixing holes. The clamping ring and the fixing ring cooperate to clamp and fix the cable during installation. This process can be carried out before assembling the housing, so as to better position the cable, reduce the impact of stress and make the connection between cables more stable.

[0020] 3. The combination of the left and right explosion-proof arc plates provides additional protection, enclosing and protecting the cable connection. The loading groove restricts the explosion-proof arc plates, thereby increasing the structural strength of the explosion-proof box. In the event of an explosion at the cable connection, the impact will first act on the left and right explosion-proof arc plates, reducing the impact on the outer upper and lower shells and improving the explosion-proof effect. Even if the left and right explosion-proof arc plates are damaged due to impact, the upper and lower shells can continue to provide protection. Furthermore, the replacement of the left and right explosion-proof arc plates is more convenient, making it easier for workers to use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front structure of an explosion-proof box for a cable intermediate joint according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the lower shell after disassembly and its engagement with the explosion-proof arc plate in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the bottom of the upper shell after disassembly and its engagement with the explosion-proof arc plate in this utility model;

[0024] Figure 4 This is a schematic diagram of the structure in this utility model where the fixing ring is disassembled and then engages with the pressure ring.

[0025] Figure 5 This is a cross-sectional view of the internal fixing slot and limiting plate of the lower housing in this utility model.

[0026] Figure 6 This is a schematic diagram of the assembly structure of the limiting plate and the fixing block after disassembly in this utility model.

[0027] In the diagram: 1. Lower housing; 2. Upper housing; 3. Lower fixing plate; 4. Upper fixing plate; 5. Fixing block; 6. Clip; 7. Fixing slot; 8. Limiting plate; 9. Extension frame; 10. Fixing ring; 11. Pressure ring; 12. Mounting hole; 13. Clamping bolt; 14. Fixing hole; 15. Loading slot; 16. Left explosion-proof arc plate; 17. Right explosion-proof arc plate; 18. Positioning plate; 19. Positioning hole; 20. Positioning post; 21. Storage slot; 22. Pressure spring; 23. Operating port; 24. Linking block; 25. Control plate; 26. Pressure slope; 27. Pressure-bearing slope head; 28. Adjusting bolt; 29. ​​Pressure block; 30. Fitting pad; 31. Guide post. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figure 1-5 An explosion-proof box for a cable intermediate joint includes a lower housing 1, an upper housing 2 at the upper end of the lower housing 1, the lower housing 1 and the upper housing 2 cooperating, a lower fixing plate 3 at both ends of the lower housing 1, an upper fixing plate 4 at both ends of the upper housing 2, a fixing block 5 at the lower end of the upper fixing plate 4, a clip 6 on the fixing block 5, a fixing slot 7 on the lower fixing plate 3, a limiting plate 8 slidably connected in the fixing slot 7, and the limiting plate 8 cooperating with the clip 6;

[0032] The lower housing 1 has extension frames 9 at both ends, a fixing ring 10 at the outer end of the extension frame 9, a pressure ring 11 above the fixing ring 10, mounting holes 12 on both sides of the pressure ring 11, a clamping bolt 13 in the mounting hole 12, and fixing holes 14 at both ends of the fixing ring 10, which are engaged with the clamping bolt 13.

[0033] In this embodiment, the lower housing 1 and the upper housing 2 are combined to form an explosion-proof box structure. When using the equipment, the connected cable is placed into the lower housing 1. When installing the upper housing 2, the upper fixing plate 4 is pressed against the lower fixing plate 3. The upper fixing plate 4 will insert the fixing block 5 into the fixing slot 7. Then, the limiting plate 8 is controlled to slide so that the limiting plate 8 cooperates with the clip 6 to prevent the movement of the fixing block 5, so that the upper fixing plate 4 and the lower fixing plate 3 are fixed together.

[0034] More specifically, the extension frame 9 provides a support structure to keep the fixing ring 10 stable. When setting up the cable, both ends of the cable are placed on the fixing ring 10, and then the pressure ring 11 is installed. The pressure ring 11 is tightened to the fixing ring 10 by passing the clamping bolt 13 through the mounting hole 12 and engaging with the fixing hole 14, thereby fixing the cable.

[0035] Please see Figures 2-5 As an implementation method for internal protection: loading slots 15 are provided on the inner sides of both the lower shell 1 and the upper shell 2. A left explosion-proof arc plate 16 and a right explosion-proof arc plate 17 are respectively provided in the loading slots 15, and the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 cooperate with each other.

[0036] Specifically, during cable installation, the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 are wrapped around the outer end of the cable connection. The cable is protected by the cooperation of the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17. When the cable is placed in the lower housing 1, the loading groove 15 provides space for the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 to be placed in the loading groove 15. The upper housing 2 is then installed. In the event of a flash explosion of the cable, the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 will first resist the impact, and then the upper housing 2 and the lower housing 1 will cooperate to provide protection.

[0037] Please see Figures 2-5 As a further implementation of the explosion-proof arc plate: both the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 are provided with positioning plates 18, and positioning holes 19 are provided on the positioning plates 18. Positioning posts 20 are provided in the loading groove 15, and the positioning posts 20 cooperate with the positioning holes 19.

[0038] Specifically, when installing the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17, the positioning plate 18 is made to cooperate with the upper housing 2 and the lower housing 1. When installing the upper housing 2 and the lower housing 1, the positioning pin 20 is inserted into the positioning hole 19, thereby positioning the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17.

[0039] Please refer to the figure. Figure 5 As a further embodiment of the fixed slot: a storage groove 21 is provided in the fixed slot 7, the limiting plate 8 slides in the storage groove 21, and a pressure spring 22 is provided in the storage groove 21.

[0040] Specifically, the storage slot 21 provides space for the limiting plate 8 to retract, making it easier for the fixing block 5 to be inserted into the fixing slot 7, and the pressure of the pressure spring 22 restricts the card head 6 by the limiting plate 8.

[0041] Please see Figure 5 As a further embodiment of the lower fixing plate: the lower fixing plate 3 has an operation port 23 at its lower end, the operation port 23 is connected to the storage groove 21, and a linkage block 24 is slidably connected in the operation port 23. One end of the linkage block 24 is connected to the limiting plate 8, and the other end is provided with a control plate 25. Multiple linkage blocks 24 are connected to one control plate 25.

[0042] Specifically, space is provided through the operation port 23, and the operation control plate 25 is moved so that the control plate 25 moves with the limiting plate 8 through the linkage block 24, which facilitates the disassembly of the housing.

[0043] Please see Figure 6 As a further embodiment of the card head: the upper end of the card head 6 is provided with a pressure-applying inclined surface 26, and the front end of the limiting plate 8 is provided with a pressure-receiving inclined head 27, which cooperates with the pressure-applying inclined surface 26.

[0044] Specifically, when the card head 6 is inserted into the fixing slot 7, it will contact the pressure-applying inclined surface 26 and the pressure-receiving inclined head 27, thereby applying pressure to the limiting plate 8, causing the limiting plate 8 to retract into the storage groove 21, which facilitates the insertion of the fixing block 5.

[0045] Please see Figure 4 As a further embodiment of the pressure ring: an adjusting bolt 28 is provided above the pressure ring 11, and a pressure block 29 is rotatably connected to the lower end of the adjusting bolt 28. A fitting pad 30 is provided at the lower end of the pressure block 29.

[0046] Specifically, by controlling the rotation of the adjusting bolt 28, the adjusting bolt 28 is engaged with the pressure ring 11 and moves downward. The pressure block 29 applies pressure to the cable, and the pressure block 29 contacts the cable through the contact pad 30, providing further fixation to the cable.

[0047] Please see Figure 4 As a further embodiment of the pressure block: the upper end of the pressure block 29 is provided with a guide post 31, and the guide post 31 is slidably engaged with the pressure ring 11.

[0048] Specifically, when the pressure block 29 moves, it cooperates with the pressure ring 11 through the guide post 31.

[0049] In summary, when the entire device is in use (or running):

[0050] When using the equipment, the connected cables are installed by first wrapping the left explosion-proof arc plate 16 and the right explosion-proof arc plate 17 around the outer end of the cable connection. The left and right explosion-proof arc plates 16 and 17 protect the cable. When the cable is placed in the lower housing 1, space is provided by the loading groove 15, allowing the left and right explosion-proof arc plates 16 and 17 to be placed inside, aligning the positioning plate 18 with the lower housing 1. The positioning pin 20 is inserted halfway into the positioning hole 19 for positioning. Then, the upper housing 2 is installed. The upper housing 2 aligns with the upper half of the left and right explosion-proof arc plates 16 and 17 through the corresponding loading groove 15, and the positioning pin 20 is inserted into the positioning hole 19, ensuring stable protection by the left and right explosion-proof arc plates 16 and 17. In the event of a flash explosion of the cable, the left and right explosion-proof arc plates 16 and 17 will first resist the impact, then transmit the impact to the outer upper housing 2 and lower housing 1, thereby improving structural strength and explosion-proof protection capability.

[0051] When the upper housing 2 and the lower housing 1 are installed together, the upper fixing plate 4 and the lower fixing plate 3 are pressed together. The upper fixing plate 4 will insert the fixing block 5 into the fixing slot 7. When the clamp 6 enters the fixing slot 7, it will contact the pressure-applying inclined surface 26 and the pressure-receiving inclined head 27, thereby applying pressure to the limiting plate 8, causing the limiting plate 8 to retract into the storage groove 21, which facilitates the insertion of the fixing block 5. After the clamp 6 passes the limiting plate 8, the limiting plate 8 will return to the fixing slot 7 by the push of the pressure spring 22, and cooperate with the back of the clamp 6 to prevent the movement of the fixing block 5, forming a fixed structure, so that the upper fixing plate 4 and the lower fixing plate 3 are fixed together, and the upper housing 2 and the lower housing 1 are fixed. When disassembly and maintenance are required, it is only necessary to operate the control plate 25 to move. The space provided by the operation port 23 allows the control plate 25 to move with the limiting plate 8 through the linkage block 24, so that the limiting plate 8 is retracted into the storage groove 21, releasing the restriction on the clamp 6 and the fixing block 5, which facilitates the disassembly of the upper housing 2.

[0052] When installing the cable, the extension frame 9 provides a support structure to keep the fixing ring 10 stable. When setting the cable, place both ends of the cable on the fixing ring 10, and then install the pressure ring 11. The pressure bolt 13 passes through the mounting hole 12 and engages with the fixing hole 14 to tighten the pressure ring 11 and the fixing ring 10, thereby applying pressure to the cable. By controlling the rotation of the adjusting bolt 28, the adjusting bolt 28 engages with the pressure ring 11, moving the pressure block 29 downward. The pressure block 29 is also pressured by the sliding engagement of the guide post 31 with the pressure ring 11, stabilizing the movement of the pressure block 29. The pressure block 29 applies pressure to the cable and contacts the cable through the contact pad 30, providing further fixation to the cable and keeping the cable at both ends of the explosion-proof box stable.

[0053] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof box for a cable intermediate joint, comprising a lower housing (1), wherein an upper housing (2) is provided at the upper end of the lower housing (1), the lower housing (1) and the upper housing (2) cooperating, characterized in that: The lower housing (1) is provided with lower fixing plates (3) at both ends, the upper housing (2) is provided with upper fixing plates (4) at both ends, the lower end of the upper fixing plate (4) is provided with fixing blocks (5), the fixing blocks (5) are provided with clips (6), the lower fixing plate (3) is provided with fixing slots (7), and a limiting plate (8) is slidably connected in the fixing slots (7), the limiting plate (8) cooperates with the clips (6); The lower housing (1) is provided with extension frames (9) at both ends. The outer end of the extension frame (9) is provided with a fixing ring (10). A pressure ring (11) is provided above the fixing ring (10). Mounting holes (12) are provided on both sides of the pressure ring (11). A clamping bolt (13) is provided in the mounting hole (12). Fixing holes (14) are provided at both ends of the fixing ring (10). The fixing holes (14) cooperate with the clamping bolt (13).

2. The explosion-proof box for cable intermediate joints according to claim 1, characterized in that: The lower shell (1) and the upper shell (2) are both provided with loading slots (15). The loading slots (15) are respectively provided with a left explosion-proof arc plate (16) and a right explosion-proof arc plate (17), which cooperate with each other.

3. The explosion-proof box for cable intermediate joints according to claim 2, characterized in that: The left explosion-proof arc plate (16) and the right explosion-proof arc plate (17) are each provided with a positioning plate (18), and a positioning hole (19) is provided on the positioning plate (18). A positioning post (20) is provided in the loading groove (15), and the positioning post (20) cooperates with the positioning hole (19).

4. The explosion-proof box for cable intermediate joints according to claim 1, characterized in that: The fixed slot (7) is provided with a storage slot (21), the limiting plate (8) is slidably engaged with the storage slot (21), and the storage slot (21) is provided with a pressure spring (22).

5. The explosion-proof box for cable intermediate joints according to claim 4, characterized in that: The lower fixed plate (3) has an operation port (23) at its lower end. The operation port (23) is connected to the storage slot (21). A linkage block (24) is slidably connected in the operation port (23). One end of the linkage block (24) is connected to the limiting plate (8), and the other end is provided with a control plate (25).

6. The explosion-proof box for cable intermediate joints according to claim 1, characterized in that: The card head (6) is provided with a pressure-applying inclined surface (26), and the front end of the limiting plate (8) is provided with a pressure-receiving inclined head (27), which cooperates with the pressure-applying inclined surface (26).

7. The explosion-proof box for cable intermediate joints according to claim 1, characterized in that: An adjusting bolt (28) is provided above the pressure ring (11), and a pressure block (29) is rotatably connected to the lower end of the adjusting bolt (28). A fitting pad (30) is provided at the lower end of the pressure block (29).

8. The explosion-proof box for cable intermediate joints according to claim 7, characterized in that: The upper end of the pressure block (29) is provided with a guide post (31), and the guide post (31) is slidably engaged with the pressure ring (11).

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