An explosion-proof distribution box

Abstract

This invention discloses an explosion-proof distribution box, relating to the field of electrical engineering equipment technology. It includes a box body and a door, with the left side of the door hinged to the box body. A pressure relief window is provided on the left side wall of the box body. A protective plate is provided on the left side of the pressure relief window to cover it. A sliding strip is connected to the right side of the protective plate. The sliding strip is slidably connected to the side of the pressure relief window in a left-right direction. A limiting block is connected to the sliding strip to prevent it from slipping off the pressure relief window. A support frame is connected to the left side inside the box body. A first tension spring is provided on the support frame. One end of the first tension spring is connected to the support frame, and the other end passes through the pressure relief window and is connected to the protective plate. The first tension spring is configured with a preload force to seal and cover the pressure relief window with the protective plate. The beneficial effect of this invention is that it can promptly release the explosive impact to the outside when an internal explosion hazard occurs, reducing the impact damage to itself and lowering the probability of it exploding.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering equipment technology, and in particular to an explosion-proof distribution box. Background Technology

[0002] A distribution box is an enclosed enclosure assembled from a metal or insulated shell, internal switching devices (circuit breakers, circuit breakers, residual current devices, contactors, terminals, etc.), busbars, and wiring accessories. Its main functions are to distribute power, control circuit on / off, protect circuits, and manage circuit branches in a power distribution system. It also centrally stores wiring, standardizes wiring, facilitates maintenance, and isolates faults. Explosion-proof distribution boxes are specifically designed for use in hazardous environments such as chemical plants and mines, requiring them to possess adequate explosion-proof capabilities.

[0003] However, current design considerations for explosion-proof distribution boxes typically focus on making their outer shells more robust and impact-resistant. But in the event of an explosion, there is a possibility of extremely strong impact. Since the inside of the distribution box is a confined and small space, the impact energy generated by the explosion can be amplified. Simply increasing the strength of the outer shell does not eliminate the risk of it cracking, especially the door. Due to its connection to the box body, the door has poor impact resistance and is easily blown off by the impact, posing a safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an explosion-proof distribution box that can promptly release the explosive impact to the outside when an internal explosion hazard occurs, thereby reducing the impact damage to itself and lowering the probability of it exploding.

[0005] The technical solution adopted in this invention is as follows: An explosion-proof distribution box is provided, comprising a box body and a door, the left side of which is hinged to the box body; a pressure relief window is provided on the left side wall of the box body; a protective plate is provided on the left side of the pressure relief window to cover it; a sliding strip is connected to the right side of the protective plate; the sliding strip is slidably connected to the side of the pressure relief window in the left-right direction; a limiting block is connected to the sliding strip to prevent it from slipping off the pressure relief window; a support frame is connected to the left side inside the box body; a first tension spring is provided on the support frame; one end of the first tension spring is connected to the support frame, and the other end passes through the pressure relief window and is connected to the protective plate; the first tension spring is configured with a preload force to seal and cover the pressure relief window with the protective plate.

[0006] To further optimize this technical solution, an explosion-proof distribution box is provided with a door reinforcement explosion-proof component between the box door and the box body. The door reinforcement explosion-proof component includes a sleeve connected to the front end of the box door; a reinforcement rod is slidably connected inside the sleeve; a base is connected to the left side of the protective plate; a plug ring is connected to the front left side of the box body via a mounting seat; an explosion-proof rope is provided on the base; one end of the explosion-proof rope is connected to the base, and the other end passes through the plug ring and is connected to the outer end of the reinforcement rod; when the slide bar slides to the left along the pressure relief window to the blocking limit block, the explosion-proof rope pulls the reinforcement rod to insert into the plug ring accordingly.

[0007] To further optimize this technical solution, a pressure relief window of an explosion-proof distribution box has multiple vertical supports evenly distributed inside; the upper and lower ends of the supports are respectively connected to the upper and lower ends of the pressure relief window.

[0008] To further optimize this technical solution, a second tension spring is used to connect the inner end of the reinforcing rod and the inner end of the sleeve of an explosion-proof distribution box.

[0009] To further optimize this technical solution, a plug ring of an explosion-proof distribution box is connected to a bearing seat on the left end; a pulley is rotatably connected inside the bearing seat; the explosion-proof rope passes around the pulley and enters the plug ring accordingly.

[0010] To further optimize this technical solution, multiple explosion-proof and reinforced door components of an explosion-proof distribution box are distributed from top to bottom.

[0011] To further optimize this technical solution, an explosion-proof distribution box has an explosion-proof interception net installed on the left side inside the box; the explosion-proof interception net is connected to the inner wall of the box on all four sides; the explosion-proof interception net is located on the right side of the pressure relief window.

[0012] The beneficial effects of this invention are as follows: The sliding strip is slidably connected to the side of the pressure relief window in the left-right direction. The first tension spring is configured with a preload to ensure the protective plate seals and blocks the pressure relief window. Through the action of the first tension spring and the sliding guidance at the sliding strip and pressure relief window, the protective plate can stably maintain the sealing and blocking effect on the pressure relief window under normal working conditions, ensuring sufficient isolation and protection for the electrical components inside the enclosure. An explosive impact can separate the protective plate from the pressure relief window, releasing the blocking effect of the protective plate and allowing the explosive impact to be quickly released to the outside through the pressure relief window, reducing the probability of the distribution box itself exploding. A limiting block is connected to the sliding strip to prevent it from slipping off the pressure relief window, and the limiting block can also prevent the protective plate from flying out, improving the safety of the pressure relief operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Left view at the pressure relief window; Figure 3A partial structural diagram of the explosion-proof reinforcement components for the cabinet door.

[0014] In the diagram, 1. Box body; 2. Box door; 3. Pressure relief window; 4. Protective plate; 5. Sliding strip; 6. Limiting block; 7. Support frame; 8. First tension spring; 9. Sleeve; 10. Reinforcing rod; 11. Base; 12. Mounting seat; 13. Insert ring; 14. Explosion-proof rope; 15. Support column; 16. Second tension spring; 17. Shaft seat; 18. Pulley; 19. Explosion-proof interception net. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1-3 As shown, an explosion-proof distribution box includes a box body 1 and a door 2. The left side of the door 2 is hinged to the box body 1. A pressure relief window 3 is opened on the left side wall of the box body 1. A protective plate 4 is provided on the left side of the pressure relief window 3 to cover it. A sliding strip 5 is connected to the right side of the protective plate 4. The sliding strip 5 is slidably connected to the side of the pressure relief window 3 in the left-right direction. A limiting block 6 is connected to the sliding strip 5 to prevent it from slipping off from the pressure relief window 3. A support frame 7 is connected to the left side inside the box body 1. A first tension spring 8 is provided on the support frame 7. One end of the first tension spring 8 is connected to the support frame 7, and the other end passes through the pressure relief window 3 and is connected to the protective plate 4. The first tension spring 8 is configured with a preload force to seal and cover the pressure relief window 3 by the protective plate 4.

[0017] Under normal working conditions, the protective plate 4 can stably maintain the sealing and shielding effect on the pressure relief window 3 through the preload of the first tension spring 8, ensuring sufficient isolation and protection for the electrical components inside the enclosure 1.

[0018] When an explosion occurs inside the enclosure 1, the explosive impact first overcomes the preload of the first tension spring 8, pushing the protective plate 4 outward. This releases the protective plate 4 from its obstruction of the pressure relief window 3, allowing the explosive impact to be quickly released to the outside through the pressure relief window 3, reducing the likelihood of the distribution box itself exploding. Furthermore, when the protective plate 4 is pushed outward, a limiting block 6 connected to the slide bar 5 prevents it from slipping off the pressure relief window 3. Therefore, the limiting block 6 prevents the protective plate 4 from detaching from the enclosure 1 and flying out, improving the safety of the pressure relief operation.

[0019] like Figure 1-3As shown, a door 2 reinforcement and explosion-proof assembly is provided between the door 2 and the body 1; the door 2 reinforcement and explosion-proof assembly includes a sleeve 9 connected to the front end of the door 2; a reinforcement rod 10 is slidably connected inside the sleeve 9; a base 11 is connected to the left side of the protective plate 4; a plug ring 13 is connected to the front left side of the body 1 through a mounting seat 12; an explosion-proof rope 14 is provided on the base 11; one end of the explosion-proof rope 14 is connected to the base 11, and the other end passes through the plug ring 13 and is connected to the outer end of the reinforcement rod 10; when the slide bar 5 slides to the left along the pressure relief window 3 to the blocking limit block 6, the explosion-proof rope 14 pulls the reinforcement rod 10 to insert into the plug ring 13 accordingly.

[0020] In the event of an explosion inside container 1, the connection between container door 2 and container 1 is less secure than that of container 1 or container door 2 alone. This means that container door 2 could potentially be blown off, posing a safety hazard. Therefore, this solution incorporates a reinforced explosion-proof component for container door 2 to prevent it from detaching from container 1 during an explosion, thus improving safety.

[0021] Specifically, the explosive impact will first push the protective plate 4 outward, and the residual impact will impact the door 2. After the plate is pushed outward, the explosion-proof rope 14 will pull the reinforcing rod 10 outward from the sleeve 9, realizing the insertion of the reinforcing rod 10 and the insert ring 13. At this time, the reinforcing rod 10, the insert ring 13 and the sleeve 9 are connected, effectively improving the firmness of the connection between the door 2 and the box body 1.

[0022] like Figure 1-2 As shown, multiple vertical support columns 15 are evenly distributed inside the pressure relief window 3; the upper and lower ends of the support columns 15 are connected to the upper and lower ends of the pressure relief window 3, respectively. The support columns 15 improve the rigidity of the pressure relief window 3 and reduce the problem of deformation of the pressure relief window 3 caused by explosion impact.

[0023] like Figure 3 As shown, the inner end of the reinforcing rod 10 is connected to the inner end of the sleeve 9 by a second tension spring 16. The elastic tension of the second tension spring 16 ensures that the reinforcing rod 10 and the insert ring 13 can be separated during normal use of the distribution box, without affecting the normal opening and closing of the box door 2.

[0024] like Figure 3 As shown, a bearing 17 is connected to the left end of the insert ring 13; a pulley 18 is rotatably connected inside the bearing 17; the explosion-proof rope 14 passes around the pulley 18 and enters the insert ring 13. Guided by the rotation of the pulley 18, the friction between the explosion-proof rope 14 and the insert ring 13 is reduced when the explosion-proof rope 14 pulls the reinforcing rod 10, thus improving the smoothness of pulling.

[0025] like Figure 2 As shown, there are multiple reinforced explosion-proof components for the door 2 distributed from top to bottom, which further enhances the reinforcement of the connection between the door 2 and the box body 1 during an explosion impact.

[0026] like Figure 1 As shown, an explosion-proof barrier net 19 (made of fire-resistant and impact-resistant material, such as stainless steel, aramid fiber, or carbon fiber) is installed on the left side inside the enclosure 1. The explosion-proof barrier net 19 is connected to the inner wall of the enclosure 1 on all four sides. The explosion-proof barrier net 19 intercepts the pressure relief window 3 on the right side. The explosion-proof barrier net 19 can intercept electrical component fragments blown away by the explosion impact, preventing them from flying out at high speed and causing safety hazards.

[0027] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An explosion-proof distribution box comprising a box body (1) and a box door (2), characterized in that: The left side of the door (2) is hinged to the box body (1); a pressure relief window (3) is opened on the left side wall of the box body (1); a protective plate (4) is provided on the left side of the pressure relief window (3) to cover it; a sliding strip (5) is connected to the right side of the protective plate (4); the sliding strip (5) is slidably connected to the side of the pressure relief window (3) in the left and right direction; a limiting block (6) is connected to the sliding strip (5) to prevent it from slipping off from the pressure relief window (3); a support frame (7) is connected to the left side inside the box body (1); a first tension spring (8) is provided on the support frame (7); one end of the first tension spring (8) is connected to the support frame (7), and the other end passes through the pressure relief window (3) and is connected to the protective plate (4); the first tension spring (8) is configured with a preload force to make the protective plate (4) seal and cover the pressure relief window (3).

2. The explosion-proof distribution box according to claim 1, characterized in that: An explosion-proof reinforcement assembly for the door (2) is provided between the door (2) and the body (1); the explosion-proof reinforcement assembly for the door (2) includes a sleeve (9) connected to the front end of the door (2); a reinforcing rod (10) is slidably connected inside the sleeve (9); a base (11) is connected to the left side of the protective plate (4); a plug ring (13) is connected to the front side of the left end of the body (1) through a mounting seat (12); an explosion-proof rope (14) is provided on the base (11); one end of the explosion-proof rope (14) is connected to the base (11), and the other end passes through the plug ring (13) and is connected to the outer end of the reinforcing rod (10); when the slide bar (5) slides to the left along the pressure relief window (3) to the blocking limit block (6), the explosion-proof rope (14) pulls the reinforcing rod (10) to be inserted into the plug ring (13).

3. The explosion-proof distribution box according to claim 1, characterized in that: The pressure relief window (3) has multiple vertical support columns (15) evenly distributed inside; the upper and lower ends of the support columns (15) are connected to the upper and lower ends of the pressure relief window (3) respectively.

4. The explosion-proof distribution box according to claim 2, characterized in that: The inner end of the reinforcing rod (10) is connected to the inner end of the sleeve (9) by a second tension spring (16).

5. The explosion-proof distribution box according to claim 4, characterized in that: The left end of the insert ring (13) is connected to a bearing seat (17); a pulley (18) is rotatably connected inside the bearing seat (17); the explosion-proof rope (14) passes around the pulley (18) and enters the insert ring (13).

6. The explosion-proof distribution box according to claim 5, characterized in that: The door (2) has multiple reinforced explosion-proof components distributed from top to bottom.

7. The explosion-proof distribution box according to claim 1, characterized in that: An explosion-proof net (19) is provided on the left side inside the box (1); the explosion-proof net (19) is connected to the inner wall of the box (1) on all four sides; the explosion-proof net (19) is blocked on the right side of the pressure relief window (3).

Images