Explosion-proof switch cabinet

Abstract

The utility model discloses an explosion-proof switch cabinet, comprising a cabinet body unit which comprises a cabinet body and a top plate, the top plate is arranged at the top of the cabinet body, and the side surface of the upper part of the cabinet body is provided with an exhaust port; the anti-explosion unit comprises a lower sliding plate, an upper sliding plate, an anti-explosion film, a spring, an ejector pin and an air bag, the lower sliding plate and the upper sliding plate are slidably installed on the upper portion in the cabinet body, the anti-explosion film is arranged on the lower sliding plate, the spring is installed between the lower sliding plate and the upper sliding plate, the air bag is installed between the upper sliding plate and the top plate, and the ejector pin is arranged on the ejector pin. The ejector pin is vertically and movably mounted on the upper sliding plate; through arrangement of the explosion-proof unit, normal work of the explosion-proof membrane can be guaranteed, the whole explosion-proof process depends on a mechanical structure, explosion-proof device failure caused by short circuit or electric control failure is avoided, and safety and reliability of the switch cabinet are remarkably improved.

Description

Technical Field

[0001] This utility model relates to an explosion-proof switch cabinet, belonging to the field of switch cabinet technology. Background Technology

[0002] Switchgear typically contains a busbar compartment, overvoltage protection device compartment, relay instrument compartment, disconnecting switch compartment, and circuit breaker compartment. Due to the limited space inside the cabinet and the dense distribution of various electrical components, these components generate a large amount of heat when energized, causing the internal temperature of the switchgear to rise. As the temperature rises, the air pressure inside the cabinet also increases. If the air pressure cannot be released effectively and in a timely manner, it may cause uncontrolled pressure inside the switchgear, ultimately leading to serious safety accidents such as explosions.

[0003] Existing literature (CN109256713B) discloses an explosion-proof device and method for the top of a switchgear, including a cabinet and a partition. An explosion-proof membrane is provided on the partition for releasing expanding gas in the space below the partition. The partition is connected to the top of the inner wall of the cabinet via a buffer assembly, which includes a baffle, a first spring, an electric push rod, and a contact switch. When the pressure of the expanding gas in the space below the partition exceeds the set pressure value of the explosion-proof membrane, the expanding gas is discharged from the explosion-proof membrane and pushes the baffle. The baffle moves upward, compressing the first spring and closing the contact switch at a set stroke, thereby controlling the electric push rod to retract its push rod, causing the partition to move upward. The expanding gas is discharged outward from exhaust windows located on both sides of the upper part of the cabinet. However, in this scheme, the baffle is located above the explosion-proof membrane, which to some extent obstructs the release of high-pressure gas. Simultaneously, the partition is controlled by the electric push rod, which often short-circuits when internal components of the switchgear malfunction, causing the electric push rod to fail to control the partition's movement, thus affecting the normal functioning of the explosion-proof device. Utility Model Content

[0004] Based on the above, this utility model provides an explosion-proof switch cabinet to overcome the shortcomings of the prior art.

[0005] The technical solution of this utility model is: an explosion-proof switch cabinet, comprising:

[0006] A cabinet unit includes a cabinet and a top plate, the top plate being disposed on the top of the cabinet, and an exhaust vent being provided on the upper side of the cabinet;

[0007] The explosion-proof unit includes a lower slide plate, an upper slide plate, an explosion-proof membrane, a spring, a ejector pin, and an airbag. The lower slide plate and the upper slide plate are slidably installed in the upper part of the cabinet body. The explosion-proof membrane is disposed on the lower slide plate. The spring is installed between the lower slide plate and the upper slide plate. The airbag is installed between the upper slide plate and the top plate. The ejector pin is vertically and movably installed on the upper slide plate.

[0008] In one example, the spring includes a first spring and a second spring, the two ends of the first spring being connected to the upper slide plate and the lower slide plate respectively, the second spring being disposed on the upper slide plate, and the length of the second spring being less than the distance between the upper slide plate and the lower slide plate.

[0009] In one example, the upper part of the lower slide plate is provided with a top post, the lower part of the upper slide plate is provided with a top sleeve, the first spring is installed between the top post and the top sleeve, and the ejector pin is movably fitted onto the top sleeve.

[0010] In one example, the ejector pin includes a middle rod portion, and a lower rod portion and an upper rod portion disposed at both ends of the middle rod portion, the lower rod portion extending downward from the bottom of the top sleeve, and the top end of the upper rod portion being pointed.

[0011] In one example, the vent includes a first vent and a second vent, the first vent being located between the lower slide plate and the upper slide plate, and the second vent being located between the upper slide plate and the top plate.

[0012] In one example, the cabinet is provided with an upper support plate and a lower support plate, and the upper sliding plate and the lower sliding plate rest on the upper support plate and the lower support plate, respectively.

[0013] The beneficial effects of this utility model are as follows: By setting the explosion-proof unit, this device can not only ensure the normal operation of the explosion-proof membrane, but also rely on the mechanical structure for the entire explosion-proof process, avoiding the failure of the explosion-proof device due to short circuit or electric control failure, thus significantly improving the safety and reliability of the switch cabinet. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an explosion-proof switchgear;

[0015] Figure 2 This is a schematic diagram of the interior of an explosion-proof switchgear.

[0016] Figure 3 This is a schematic diagram showing the relationship between the top plate and the bottom plate.

[0017] Figure 4 This is a schematic diagram showing the relationship between the upper and lower skateboards;

[0018] Figure 5 This is a schematic diagram of the lower sliding plate, top column, and top sleeve;

[0019] Figure 6 This is a schematic diagram of a thimble;

[0020] Explanation of reference numerals in the attached figures:

[0021] Cabinet unit: 11 Cabinet, 12 Top plate, 13 Exhaust vent, 131 First exhaust vent, 132 Second exhaust vent, 14 Upper support plate, 15 Lower support plate;

[0022] Explosion-proof unit: 21 lower slide plate, 22 upper slide plate, 23 explosion-proof membrane, 24 spring, 241 first spring, 242 second spring, 25 ejector pin, 26 airbag, 27 ejector column, 28 ejector sleeve, 251 middle rod, 252 lower rod, 253 upper rod. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] Please see Figures 1 to 6 This embodiment provides an explosion-proof switchgear, which includes a cabinet unit and an explosion-proof unit.

[0025] The cabinet unit includes a cabinet 11 and a top plate 12. The top plate 12 is installed on the top of the cabinet 11, and an exhaust port 13 is provided on the upper side of the cabinet 11. The explosion-proof unit includes a lower sliding plate 21, an upper sliding plate 22, an explosion-proof membrane 23, a spring 24, a ejector pin 25, and an airbag 26. The lower sliding plate 21 and the upper sliding plate 22 are slidably installed in the upper part of the cabinet 11. An upper support plate 14 and a lower support plate 15 are provided on both sides of the cabinet 11. The upper sliding plate 22 and the lower sliding plate 21 rest on the upper support plate 14 and the lower support plate 15, respectively. The explosion-proof membrane 23 is installed in the middle of the lower sliding plate 21. Multiple sets of springs 24 are installed between the lower sliding plate 21 and the upper sliding plate 22. The airbag 26 is installed between the upper sliding plate 22 and the top plate 12. The ejector pin 25 is vertically movable and installed on the upper sliding plate 22.

[0026] By incorporating an explosion-proof unit, when a component inside the switchgear malfunctions, a large amount of heat is generated, causing the gas inside the cabinet to expand rapidly. When the gas pressure exceeds the set pressure value of the explosion-proof membrane 23, it will rupture the membrane 23 to release the pressure and prevent an explosion. If the gas expands too quickly and cannot be released rapidly through the explosion-proof membrane 23, the gas pressure pushes the lower sliding plate 21. The lower sliding plate 21 overcomes the force of the spring 24 and pushes the ejector pin 25 upward. The ejector pin 25 moves upward and punctures the airbag 26. At this point, the lower sliding plate 21 is no longer under the force of the airbag 26 and moves upward above the exhaust port 13. The gas inside the cabinet is then rapidly released through the exhaust port 13, thus preventing an explosion. Compared with existing technologies, this device does not have a baffle on the explosion-proof membrane 23, ensuring its normal operation. Furthermore, the entire explosion-proof process relies on a mechanical structure, avoiding failure of the explosion-proof device due to short circuits or electrical control malfunctions, significantly improving the safety and reliability of the switchgear.

[0027] To improve the cushioning effect, the spring 24 includes a first spring 241 and a second spring 242. The two ends of the first spring 241 are connected to the upper slide plate 22 and the lower slide plate 21, respectively. The second spring 242 is arranged on the upper slide plate 22, and the length of the second spring 242 is less than the distance between the upper slide plate 22 and the lower slide plate 21. Thus, the second spring 242 is a certain distance away from the lower slide plate 21. Through the combination of the first spring 241 and the second spring 242, graded cushioning and energy absorption can be achieved to prevent damage to internal parts.

[0028] For ease of operation, a top post 27 is provided on the upper part of the lower slide plate 21, and a top sleeve 28 is provided on the lower part of the upper slide plate 22. A first spring 241 is installed between the top post 27 and the top sleeve 28. A pin 25 is movably fitted on the top sleeve 28. The pin 25 includes a middle rod 251, and a lower rod 252 and an upper rod 253 provided at both ends of the middle rod 251. The lower rod 252 extends downward beyond the bottom of the top sleeve 28, and the top of the upper rod 253 is pointed. In its natural state, the lower rod 252 extends downward beyond the bottom of the top sleeve 28. When the lower slide plate 21 moves upward a predetermined distance, the top post 27 pushes upward against the lower rod 252, causing the pin 25 to move upward, and finally the upper rod 253 punctures the airbag 26.

[0029] For ease of operation, the exhaust port 13 includes a first exhaust port 131 and a second exhaust port 132. The first exhaust port 131 is located between the lower slide plate 21 and the upper slide plate 22 to facilitate the release of the expanded gas inside the cabinet. The second exhaust port 132 is located between the upper slide plate 22 and the top plate 12 to release the gas in the airbag 26.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An explosion-proof switchgear, characterized by comprising: The utility model relates to a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet.

2. Switchgear of the explosion-proof type according to claim 1, characterized in that The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet.

3. The explosion-proof switchgear according to claim 2, characterized in that The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet.

4. Switchgear of the explosion-proof type according to claim 3, characterized in that The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet.

5. The explosion-proof switchgear according to claim 1, characterized in that The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet.

6. The explosion-proof switchgear according to claim 1, characterized in that The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. The utility model discloses a cabinet body unit, an explosion-proof unit and a cabinet. 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