Positive-voltage power distribution cabinet with explosion-proof and pressure-relief functions

Abstract

The utility model relates to the technical field of positive-voltage power distribution cabinets, and discloses a positive-voltage power distribution cabinet with explosion-proof and pressure-relief functions, which comprises a cabinet body, a cabinet door is rotatably connected to one side in the cabinet body, a pressure-relief assembly is arranged at the top of the cabinet body and comprises a pressure-relief top window, and fixing plates are arranged on two sides of the bottom of the pressure-relief top window. And guide grooves are formed in the two fixing plates correspondingly, supporting plates are fixedly connected to the two sides of the bottom of the pressure relief transom window correspondingly, connecting plates are fixedly connected to the bottoms of the two supporting plates correspondingly, and sliding rods are fixedly connected to one sides of the outer walls of the two connecting plates correspondingly. According to the utility model, the pressure relief transom window is jacked upwards by impact force, so that the displacement of the connecting plate is converted into rotation under the linkage of the connecting arm I and the connecting arm II and the limitation of the guide groove, the pressure relief transom window is rotated from horizontal to vertical, the top of the cabinet body is completely opened, and the effect of quick explosion-proof pressure relief is achieved; the problems that a traditional cabinet body is slow in pressure relief, concentrated in impact and prone to damage are solved, and the pressure relief efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of positive pressure distribution cabinet technology, and in particular to a positive pressure distribution cabinet with explosion-proof pressure relief function. Background Technology

[0002] In the field of industrial electrical systems, positive pressure distribution cabinets with explosion-proof pressure relief functions are widely used in flammable and explosive environments such as petroleum, chemical, and coal mines. Their function is to ensure the safe operation of internal electrical equipment and prevent deflagration accidents caused by equipment failure from endangering the surrounding environment. Positive pressure distribution cabinets prevent flammable and explosive gases from entering the cabinet by maintaining the internal air pressure higher than the external pressure. However, even so, internal electrical equipment may still deflagrate due to short circuits, overloads, or other reasons. At this time, an efficient and reliable explosion-proof pressure relief structure becomes the key to protecting the safety of equipment and personnel.

[0003] Existing positive pressure distribution cabinets mostly adopt a single pressure relief port design. Commonly, a simple explosion-proof membrane or an openable pressure relief door is installed on the top of the cabinet. When an internal deflagration occurs, the explosion-proof membrane ruptures or the pressure relief door opens under pressure, releasing the high-pressure gas inside. This type of structure mainly relies on pressure difference to drive pressure relief, and pressure relief is controlled by mechanical connection or the strength threshold of the diaphragm.

[0004] However, the existing single pressure relief port design has obvious shortcomings. Due to the single pressure relief channel, the impact force generated by the deflagration is difficult to disperse quickly, resulting in a slow pressure relief speed. The internal pressure of the cabinet cannot be released in time, and the equipment is easily damaged by continuous high pressure impact. At the same time, the traditional pressure relief structure cannot automatically reset after pressure relief, and the sealing is difficult to restore. External dust, water vapor and flammable and explosive gases can easily enter the cabinet, which not only affects the normal operation of the equipment, but also causes secondary safety accidents. It cannot meet the high requirements of industrial production for the safety and reliability of positive pressure distribution cabinets. Therefore, a positive pressure distribution cabinet with explosion-proof pressure relief function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a positive pressure distribution cabinet with explosion-proof pressure relief function, which aims to improve the problems of slow pressure relief and easy damage caused by concentrated impact in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A positive pressure distribution cabinet with explosion-proof pressure relief function includes a cabinet body, a cabinet door is rotatably connected to one side of the cabinet body, and a pressure relief component is provided on the top of the cabinet body;

[0008] The pressure relief assembly includes a pressure relief top window, the outer wall of which is slidably connected to the top of the cabinet. Fixed plates are provided on both sides of the bottom of the pressure relief top window. The side walls of the two fixed plates are fixedly connected to the inner wall of the cabinet. Guide grooves are provided inside the two fixed plates. Support plates are fixedly connected to both sides of the bottom of the pressure relief top window. Connecting plates are fixedly connected to the bottom of the two support plates. A sliding rod is fixedly connected to one side of the outer wall of each of the two connecting plates, and a connecting rod is fixedly connected between the other sides of their outer walls. One end of the sliding rod and the connecting rod are slidably connected inside the guide groove. Connecting arms are fixedly connected to both ends of the connecting rod. One end of each connecting arm is rotatably connected to a second connecting arm, and the other end of the second connecting arm is rotatably connected to the bottom of the outer wall of the connecting plate.

[0009] As a further description of the above technical solution:

[0010] The bottom of the cabinet is fixedly connected to symmetrical support bases, which are used to support the cabinet.

[0011] As a further description of the above technical solution:

[0012] The cabinet is equipped with a mounting plate inside, and the side wall of the mounting plate is fixedly connected to one side of the inner wall of the cabinet. The mounting plate is used to install and fix electrical equipment.

[0013] As a further description of the above technical solution:

[0014] A door handle is fixedly connected to the outer wall of the cabinet door, and the door handle is used to assist in manually opening and closing the cabinet door.

[0015] As a further description of the above technical solution:

[0016] A pressure relief window is provided on the upper inside of the cabinet door, and the outer wall of the pressure relief window is slidably connected to the inside of the cabinet door.

[0017] As a further description of the above technical solution:

[0018] Multiple fixed posts are fixedly connected to one side of the cabinet door. The fixed posts are located at the four corners of the pressure relief window. Each fixed post has a movable post slidably connected inside. One end of each movable post is fixedly connected to the side wall of the pressure relief window.

[0019] As a further description of the above technical solution:

[0020] Each of the movable columns is fixedly connected to a first limiting plate and a second limiting plate on its outer wall. The first limiting plate is located at the other end of the fixed column, and the second limiting plate is located at the middle section of the outer wall of the fixed column.

[0021] As a further description of the above technical solution:

[0022] Each of the fixed columns is fitted with a limiting spring on its outer wall. One end of each limiting spring is fixedly connected to the two side walls of the limiting plate, and the other end of each limiting spring is fixedly connected to the inside of the fixed column.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the impact force pushes the pressure relief top window upward, causing the connecting plate to move accordingly. Under the linkage of connecting arm one and connecting arm two and the restriction of the guide groove, the displacement of the connecting plate is converted into rotation, so that the pressure relief top window turns from horizontal to vertical, and the top of the cabinet is fully opened, achieving the effect of rapid explosion-proof pressure relief. This solves the problems of slow pressure relief and concentrated impact damage in traditional cabinets, improves pressure relief efficiency, reduces the risk of equipment damage, and enhances safety.

[0025] 2. In this utility model, when the internal pressure increases, the pressure relief window moves outward under pressure, causing the four corner movable columns to move, which in turn causes the limiting plate to compress the limiting spring, forming a gap between the pressure relief window and the cabinet door to release pressure. After the pressure decreases, the limiting spring pushes the movable columns to reset, causing the pressure relief window to reseal. This achieves the effect of both rapid pressure relief and rapid restoration of the cabinet's sealing performance after pressure relief, solving the problems of difficulty in resetting and poor sealing performance of traditional pressure relief structures after pressure relief. It also improves the dustproof and waterproof performance of the equipment, extends its service life and operational stability. Attached Figure Description

[0026] Figure 1 This is a perspective view of the positive pressure distribution cabinet with explosion-proof pressure relief function proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the cabinet structure of the positive pressure distribution cabinet with explosion-proof pressure relief function proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the connection plate structure of the positive pressure distribution cabinet with explosion-proof pressure relief function proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the cabinet door structure of the positive pressure distribution cabinet with explosion-proof pressure relief function proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Cabinet body; 2. Cabinet door; 3. Support base; 4. Door handle; 5. Pressure relief window; 6. Pressure relief top window; 7. Fixing plate; 8. Guide groove; 9. Connecting plate; 10. Support plate; 11. Sliding rod; 12. Connecting rod; 13. Connecting arm one; 14. Connecting arm two; 15. Mounting plate; 16. Fixing column; 17. Movable column; 18. Limiting plate one; 19. Limiting plate two; 20. Limiting spring. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of a positive pressure distribution cabinet with explosion-proof pressure relief function, including a cabinet body 1. The cabinet body 1 is the main structure and is made of high-quality cold-rolled steel plate with a thickness of 2mm, bent and welded. The surface is treated by pickling and phosphating and then sprayed with epoxy resin powder, which has good anti-rust and anti-corrosion properties. It is used to house and protect the internal electrical equipment. A cabinet door 2 is rotatably connected to one side of the inside of the cabinet body 1 by a hinge. The cabinet door 2 is also made of cold-rolled steel plate and has a sealing strip on the surface to seal the cabinet body 1, ensuring the positive pressure environment inside. At the same time, it is convenient for operators to inspect and maintain the internal equipment. The pressure relief component set on the top of the cabinet body 1 is a key component to ensure the safety of the equipment. It is used to quickly release pressure in case of abnormal situations such as deflagration inside the cabinet body 1.

[0035] The pressure relief assembly centers on the pressure relief top window 6, which is made of 3mm thick 304 stainless steel sheet with a polished surface. Its outer wall slides into the mounting groove on the top of the cabinet 1, allowing it to open and release pressure under load. Fixing plates 7, also made of 5mm thick 304 stainless steel, are located on both sides of the bottom of the pressure relief top window 6. These plates are bolted to the inner wall of the cabinet 1, providing support and guidance for the movement of the pressure relief top window 6. Guide grooves 8, Y-shaped in cross-section, are milled into the interior of the two fixing plates 7. To constrain the movement trajectory of the pressure relief window 6 during its opening process, support plates 10 are bolted to both sides of the bottom of the pressure relief window 6. The support plates 10 are made of 304 stainless steel and are used to connect the pressure relief window 6 and the connecting plate 9 to transmit pressure. A connecting plate 9 is welded to the bottom of the two support plates 10. The connecting plate 9 is stamped from 304 stainless steel and is used to install transmission components such as the sliding rod 11 and connecting rod 12. A sliding rod 11, made of 304 stainless steel round bar, is welded to one side of the outer wall of the connecting plate 9. The other side of the connecting plate 9 is welded together. A connecting rod 12 is fixedly connected to the connecting plate 9. The connecting rod 12 is also made of 304 stainless steel round steel. The outer walls of the sliding rod 11 and the connecting rod 12 are fixed to the connecting plate 9. One end of the connecting rod 12 is slidably engaged with the guide groove 8 of the fixed plate 7, which is used to convert the linear motion of the connecting plate 9 into the flipping motion of the pressure relief roof window 6. Connecting arms 13 are fixedly connected to both ends of the connecting rod 12. Connecting arms 13 are stamped from 304 stainless steel sheet and are used to transmit motion and force. Connecting arms 14 are rotatably connected to the other end of connecting arms 13 via a pin. Connecting arms 14 are also made of 304 stainless steel sheet. The other end of the cabinet is formed by stamping and is rotatably connected to the bottom of the outer wall of the connecting plate 9 by a pin. It is used to cooperate with the connecting arm 13 to realize the flipping of the pressure relief top window 6. The bottom of the cabinet 1 is fixedly connected by welding to the left and right symmetrical support seats 3. The support seats 3 are made of Q235B steel and the surface is treated with anti-rust. They are used to stably support the cabinet 1 on the ground or the installation platform. The cabinet 1 is fixedly connected to the inside by bolts to the mounting plate 15. The mounting plate 15 is made of cold-rolled steel plate and has holes on the surface for installing and fixing electrical equipment such as circuit breakers and contactors, providing a mounting carrier for electrical components.

[0036] Reference Figure 4 and Figure 5A door handle 4 is bolted to the outer wall of cabinet door 2. The handle 4 is made of high-strength engineering plastic injection molding with anti-slip textures on the surface. Its main function is to assist operators in opening and closing cabinet door 2, facilitating the inspection and maintenance of electrical equipment inside cabinet 1. A pressure relief window 5 located above the interior of cabinet door 2 is a key component for ensuring pressure balance inside cabinet 1. The pressure relief window 5 is composed of a stainless steel 304 sheet metal frame and explosion-proof glass. The outer wall of its frame forms a precise sliding fit with a pre-set groove inside cabinet door 2, allowing it to move along the groove under pressure. This is used to promptly open and release pressure when the internal pressure of cabinet 1 abnormally increases, and to reseal after the pressure returns to normal. Multiple fixed posts 16 are welded to one side of the interior of cabinet door 2. These fixed posts 16 are made of stainless steel 304 round steel and are located at the four corners of the pressure relief window 5, providing sliding guidance and installation support for movable posts 17. Each fixed post 16 has a drilled hole to form an installation channel for the movable post 17, ensuring that the movable post 17 can... The movable column 17, which slides freely inside each fixed column 16, is also made of stainless steel 304 and is slidably connected inside each fixed column 16. One end of the movable column 17 is fixedly connected to the side wall of the pressure relief window 5 by welding, which is used to transmit the displacement of the pressure relief window 5 and drive the pressure relief window 5 to reset under the action of the limit spring 20. The outer wall of each movable column 17 is fixedly connected to the limit plate 18 and the limit plate 19 by welding. The limit plate 18 and the limit plate 19 are both stamped from stainless steel 304. The limit plate 18 is located at the other end of the fixed column 16 and is used for... The maximum outward movement of the movable column 17 is limited. The second limiting plate 19 is located in the middle of the outer wall of the fixed column 16. It is used to fix the limiting spring 20 and transmit pressure. The limiting spring 20 sleeved on the outer wall of the fixed column 16 is made of 65Mn spring steel. After heat treatment, the elastic coefficient is stable. One end is fixed to the side wall of the second limiting plate 19 by welding, and the other end is welded to the spring seat preset inside the fixed column 16. It is used to provide the reset elastic force for the movable column 17 and ensure that the pressure relief window 5 can quickly restore the sealing state after the pressure relief is completed.

[0037] Working principle: When using this positive pressure distribution cabinet with explosion-proof pressure relief function, when an explosion occurs in the electrical equipment inside the cabinet 1, the impact force generated by the explosion will push the pressure relief top window 6 upward. The displacement of the pressure relief top window 6 will drive the connecting plate 9 to move upward through the support plate 10. The displacement of the connecting plate 9 will cause the sliding rod 11 and connecting rod 12 on its side wall to slide in the guide groove 8 inside the fixed plate 7. The sliding rod 11 moves upward, and the connecting rod 12 moves along the track on the side of the guide groove 8. At this time, the connecting rod 12 drives the connecting arm 13 to rotate, and causes the connecting arm 14 to rotate as well. Under the linkage of the connecting arm 13 and the connecting arm 14 and the restriction of the guide groove 8, the displacement of the connecting plate 9 is converted into rotation, so that the pressure relief top window 6 rotates from a horizontal state to a vertical state. At this time, the top inside the cabinet 1 is fully opened, thereby achieving the effect of rapid explosion-proof pressure relief.

[0038] During normal operation, the pressure relief window 5 fits tightly against the inside of the cabinet door 2, ensuring the airtightness of the cabinet body 1. When the internal pressure increases, the pressure relief window 5 is pushed outward by the pressure. The displacement of the pressure relief window 5 causes the movable columns 17 at its four corners to also move. The displacement of the movable columns 17 causes the limiting plates 18 and 19 to also move, which in turn causes the limiting spring 20 to be compressed, forming a gap between the pressure relief window 5 and the cabinet door 2. The pressure is discharged through the gap, realizing pressure relief. As the pressure decreases, the limiting spring 20 returns to its original position, pushing the movable columns 17 back to their original position, which in turn causes the pressure relief window 5 to reseal the gap. This achieves the effect of ensuring the pressure relief function and quickly restoring the airtightness of the cabinet body 1 after pressure relief.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positive pressure distribution cabinet with explosion-proof pressure relief function, comprising a cabinet body (1), characterized in that: The cabinet (1) has a cabinet door (2) rotatably connected to one side inside, and a pressure relief assembly is provided on the top of the cabinet (1). The pressure relief assembly includes a pressure relief top window (6), the outer wall of which is slidably connected to the top of the cabinet (1). Fixing plates (7) are provided on both sides of the bottom of the pressure relief top window (6). The side walls of the two fixing plates (7) are fixedly connected to the inner wall of the cabinet (1). Guide grooves (8) are provided inside the two fixing plates (7). Support plates (10) are fixedly connected to both sides of the bottom of the pressure relief top window (6). Connecting plates (9) are fixedly connected to the bottom of the two support plates (10). Each of the two connecting plates (9) has a sliding rod (11) fixedly connected to one side of its outer wall, and a connecting rod (12) fixedly connected between the other sides of its outer wall. One end of the sliding rod (11) and the connecting rod (12) are slidably connected inside the guide groove (8). Both ends of the connecting rod (12) are fixedly connected to a connecting arm (13). One end of the connecting arm (13) is rotatably connected to a connecting arm (14). The other end of the connecting arm (14) is rotatably connected to the bottom of the outer wall of the connecting plate (9).

2. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 1, characterized in that: The cabinet (1) is fixedly connected to a left and right symmetrical support base (3) at the bottom, and the support base (3) is used to support the cabinet (1).

3. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 1, characterized in that: The cabinet (1) is provided with an installation plate (15) inside. The side wall of the installation plate (15) is fixedly connected to one side of the inner wall of the cabinet (1). The installation plate (15) is used to install and fix electrical equipment.

4. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 1, characterized in that: The cabinet door (2) is fixedly connected to a door handle (4) on its outer wall. The door handle (4) is used to assist in manually opening and closing the cabinet door (2).

5. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 4, characterized in that: A pressure relief window (5) is provided on the upper part of the cabinet door (2), and the outer wall of the pressure relief window (5) is slidably connected to the inside of the cabinet door (2).

6. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 5, characterized in that: Multiple fixed columns (16) are fixedly connected to one side of the cabinet door (2). The fixed columns (16) are located at the four corners of the pressure relief window (5). Each fixed column (16) is slidably connected to a movable column (17). One end of each movable column (17) is fixedly connected to the side wall of the pressure relief window (5).

7. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 6, characterized in that: Each of the movable columns (17) has a limiting plate one (18) and a limiting plate two (19) fixedly connected to its outer wall. Each of the limiting plates one (18) is located at the other end of the fixed column (16), and each of the limiting plates two (19) is located at the middle section of the outer wall of the fixed column (16).

8. The positive pressure distribution cabinet with explosion-proof pressure relief function according to claim 7, characterized in that: Each of the fixed columns (16) is fitted with a limiting spring (20) on its outer wall. One end of each limiting spring (20) is fixedly connected to the side wall of the limiting plate (19), and the other end of each limiting spring (20) is fixedly connected to the inside of the fixed column (16).

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