Gas control device, switchgear and switchgear system

Abstract

The application provides a gas control device, a switch cabinet and a switch equipment system. The gas control device comprises a fixed plate provided with a communication port and anti-rotation brake members distributed on both sides of the communication port; a sector-shaped flap is rotatably arranged on the fixed plate, and the sector-shaped flap comprises a forward pressure relief sector-shaped part and a reverse pressure relief sector-shaped part, and the forward pressure relief sector-shaped part and the reverse pressure relief sector-shaped part are arranged back to back; in a normally closed state, the anti-rotation brake members limit the rotation of the sector-shaped flap, so that the sector-shaped flap blocks the communication port of the fixed plate; in the case that the sector-shaped flap is impacted by forward gas from a second space and overcomes the limitation of the anti-rotation brake members, the sector-shaped flap can rotate to a forward opening state, so that the forward gas is discharged through a forward pressure relief hole; in the case that the sector-shaped flap is impacted by reverse gas from a first space and overcomes the limitation of the anti-rotation brake members, the sector-shaped flap can rotate to a reverse opening state, so that the reverse gas is discharged through a reverse pressure relief hole.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to a gas control device, switch cabinet, and switchgear system. Background Technology

[0002] In the event of a short circuit inside the switchgear, a large amount of high-temperature, high-pressure gas will be generated. This gas must be vented; otherwise, the internal pressure will have nowhere to dissipate, potentially causing the cabinet to explode and resulting in injury or death. Furthermore, switchgear generates a significant amount of heat during operation. Excessive accumulation of hot gas can also negatively impact the switchgear's performance; therefore, timely heat dissipation is often necessary. Summary of the Invention

[0003] In view of this, the present invention provides a gas control device, comprising:

[0004] A fixed plate is provided with a connecting port and anti-rotation braking components distributed on both sides of the connecting port, the connecting port being used to connect a first space and a second space;

[0005] A fan-shaped flap is rotatably mounted on the fixed plate. The fan-shaped flap includes a forward pressure relief fan-shaped component and a reverse pressure relief fan-shaped component. The forward pressure relief fan-shaped component and the reverse pressure relief fan-shaped component are arranged back to back. The fan-shaped flap has a normally closed state, a forward open state, and a reverse open state.

[0006] In the normally closed state, the anti-rotation brake restricts the rotation of the fan-shaped flap, causing the fan-shaped flap to block the communication port of the fixed plate, thereby separating the first space and the second space. When subjected to a positive gas impact from the second space and overcoming the restriction of the anti-rotation brake, the fan-shaped flap can rotate to the positive opening state, allowing the positive gas to be discharged through the positive pressure relief hole provided on the positive pressure relief fan-shaped component. When subjected to a reverse gas impact from the first space and overcoming the restriction of the anti-rotation brake, the fan-shaped flap can rotate to the reverse opening state, allowing the reverse gas to be discharged through the reverse pressure relief hole provided on the reverse pressure relief fan-shaped component.

[0007] By setting up a fan-shaped flap, the physical impact force of the gas itself can be used as a driving source to overcome the resistance of the braking components and open the valve, resulting in lower costs. Moreover, it can achieve bidirectional control of the gas, meaning that gas in the first space can enter the second space, and gas in the second space can also enter the first space. In complex systems or equipment containing multiple independent spaces, regardless of whether the gas to be released comes from the first or second space, the gas can be automatically discharged to the adjacent normal space through this device, making full use of the pressure buffering between adjacent spaces.

[0008] Optionally, according to the gas control device described above, the fan-shaped flap includes at least one closed panel. Both the forward-relieving fan-shaped component and the reverse-relieving fan-shaped component include an arc-shaped base plate and two end panels. The arc-shaped base plate is connected to one edge of the closed panel, and the two end panels are respectively connected to the longitudinal ends of the closed panel and the arc-shaped base plate. The closed panel, the arc-shaped base plate, and the two end panels together form a groove-shaped structure with an opening on one side. The forward-relieving hole is located on the arc-shaped base plate of the forward-relieving fan-shaped component, and the reverse-relieving hole is located on the arc-shaped base plate of the reverse-relieving fan-shaped component. The forward-relieving fan-shaped component and the reverse-relieving fan-shaped component share the same closed panel; alternatively, each of the forward-relieving fan-shaped component and the reverse-relieving fan-shaped component has one closed panel, and the two closed panels are arranged back-to-back. This structure is easy to implement.

[0009] Optionally, the gas control device described above may include: in a normally closed state, the sealing panel is capable of sealing the communication opening, and the reverse pressure relief hole and the forward pressure relief hole are located in the first space and the second space, respectively. This completely blocks the flow of dust and moisture between adjacent spaces.

[0010] Optionally, both the forward pressure relief sector component and the reverse pressure relief sector component are provided with braking grooves. These braking grooves cooperate with the anti-rotation brake to restrict the rotation of the forward pressure relief sector component and / or the reverse pressure relief sector component. The presence of these braking grooves improves the reliability of the gas control device.

[0011] Optionally, according to the gas control device described above, multiple braking grooves are respectively provided on the rotation paths of the forward pressure relief sector component and the reverse pressure relief sector component to provide a stop engagement when the forward pressure relief sector component and the reverse pressure relief sector component rotate to different angles. In this way, even if the gas pressure decreases, the sector flap can still be kept in the open state due to the restriction of the braking grooves.

[0012] Optionally, a positive anti-rotation brake is disposed in the first space according to the gas control device described above, the positive anti-rotation brake comprising:

[0013] A first extension plate is fixed to the fixed plate and extends toward the first space;

[0014] The first elastic protrusion is fixed to the first extension plate and has a preset distance from the fixed plate. The first elastic protrusion is used to prevent the fan-shaped flap from rotating, and deforms when subjected to a preset pressure from the positive gas impact from the second space, so that the fan-shaped flap can rotate toward the first space.

[0015] and / or

[0016] A reverse anti-rotation brake is installed in the second space, and the reverse anti-rotation brake includes:

[0017] A second extension plate is fixed to the fixed plate and extends toward the second space;

[0018] The second elastic protrusion is fixed to the second extension plate and has a preset distance from the fixed plate. The second elastic protrusion is used to hinder the rotation of the fan-shaped flap and deforms when subjected to a preset pressure from the reverse gas impact from the first space, so that the fan-shaped flap can rotate into the second space.

[0019] Optionally, according to the gas control device described above, both the edges of the positive pressure relief fan-shaped component and the reverse pressure relief fan-shaped component are provided with limiting flanges;

[0020] The limiting flange on the reverse pressure relief fan-shaped component can abut against the fixed plate to limit the rotation of the fan-shaped flap to the maximum opening position in the reverse opening state; the limiting flange on the forward pressure relief fan-shaped component can abut against the fixed plate to limit the rotation of the fan-shaped flap to the maximum opening position in the forward opening state.

[0021] Such a structure is easy to implement and has a low cost.

[0022] Optionally, according to the gas control device described above, there are at least two forward pressure relief ports and at least two reverse pressure relief ports; and / or

[0023] It also includes several mesh plates, which are respectively disposed on the forward pressure relief hole and the reverse pressure relief hole.

[0024] Optionally, according to the gas control device described above, a fixed support is provided on the fixed plate, and a hinged support is provided on the fan-shaped flap, with a hinge shaft passing through the fixed support and the hinged support. The hinged structure provides the fan-shaped flap with an extremely stable and low-friction rotation center, ensuring that the fan-shaped flap can still rotate smoothly without mechanical jamming when subjected to instantaneous impact force.

[0025] The present invention also provides a switch cabinet, comprising:

[0026] Box;

[0027] A pressure relief chamber is located at the top of the housing;

[0028] At least one gas control device according to any of the above, wherein the fixing plate is a side plate of the pressure relief chamber.

[0029] The present invention further provides a switching device system, comprising:

[0030] At least two adjacent switch cabinets are arranged, and a pressure relief channel is formed on the top of the adjacent switch cabinets;

[0031] At least one gas control device according to any of the preceding claims, the gas control device being disposed within the pressure relief channel, is configured to activate in the event of a failure in one of the switchgear cabinets and the generation of gas, thereby directionally discharging the gas into the pressure relief channel of an adjacent switchgear cabinet. Attached Figure Description

[0032] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which will make the above and other features and advantages of the present invention more apparent to those skilled in the art. In the drawings:

[0033] Figure 1 This is a schematic diagram of the gas control device in a normally closed state according to an embodiment of the present invention.

[0034] Figure 2 for Figure 1 A schematic diagram of an explosion of the gas control device shown.

[0035] Figure 3 This is a schematic diagram of the structure of a positive pressure relief fan-shaped component according to an embodiment of the present invention.

[0036] Figure 4 This is a partial side view of a sector-shaped flap in a normally closed state according to an embodiment of the present invention.

[0037] Figure 5 This is a partial side view of a fan-shaped flap in the forward-opening state according to an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the fan-shaped flap in the forward-opening state according to an embodiment of the present invention from another angle.

[0039] Figure 7 This is a partial side view of a fan-shaped flap in the reverse open state according to an embodiment of the present invention.

[0040] Figure 8 This is a partially enlarged schematic diagram showing the fit between the brake groove and the anti-rotation brake component.

[0041] Figure 9 for Figure 1 An enlarged schematic diagram of the hinge structure at point S.

[0042] Figure 10 This is a schematic diagram of the pressure relief channel and gas control device of the switching equipment system in a normally closed state in an embodiment of the present invention.

[0043] Figure 11 This is a schematic diagram illustrating the activation of the gas control device and the directional emission of gas in the event of a fault in the switching equipment system according to an embodiment of the present invention.

[0044] The reference numerals in the attached figures are as follows:

[0045] 1-Fixing plate

[0046] 11-Connecting Port

[0047] 121-Positive anti-spin brake component

[0048] 1211-First Extension Plate

[0049] 1212-First elastic protrusion

[0050] 122-Reverse anti-spin brake

[0051] 1221 - Second Extension Plate

[0052] 1222-Second elastic protrusion

[0053] 2-Fan-shaped flap

[0054] 21-Reverse pressure relief sector component

[0055] 211-Reverse pressure relief hole

[0056] 22- Positive pressure relief sector component

[0057] 221-Forward pressure relief hole

[0058] 231-Closed Panel

[0059] 232-Arc-shaped base plate

[0060] 233-End Panel

[0061] 24-Brake Groove

[0062] 25-Limited Flanging

[0063] 31-Fixed support

[0064] 32-Hinged Support

[0065] 33-Hinged shaft

[0066] 34-Mounting Holes

[0067] 41-First pressure relief chamber

[0068] 42-Second pressure relief chamber

[0069] 43-Ventilation opening

[0070] 44-strip hole

[0071] 45-Deformable part

[0072] 46-Blind

[0073] A-First Switchgear

[0074] B-Second Switchgear

[0075] L-First Space

[0076] R-Second Space Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of this invention clearer, the following embodiments are provided to further illustrate the invention in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.

[0078] The present invention provides a gas control device for controlling the flow direction of gas, for example, for depressurization or heat dissipation.

[0079] like Figure 1 The diagram shown is a structural schematic of the gas control device according to this embodiment. Figure 2 As shown, Figure 1 An exploded view of the structure. The gas control device includes a fixed plate 1 and a fan-shaped flap 2.

[0080] The fixed plate 1 is provided with a connecting port 11 and an anti-rotation brake. The connecting port 11 is used to connect the first space L and the second space R. The fixed plate 1 is usually made of sheet metal to withstand the impact of high-pressure gas. The connecting port 11 can be located in the middle of the fixed plate 1, and it can be as follows: Figure 1 The rectangle shown can also be a large-area openwork opening, such as a square or polygon; there is no specific limitation. For example, the left side of the fixing plate 1 is the first space L, and the right side of the fixing plate 1 is the second space R. As an example, a positive anti-rotation brake 121 and a reverse anti-rotation brake 122 are provided on the fixing plate 1 along the edge of the connecting opening 11.

[0081] The fan-shaped flap 2 is rotatably mounted on the fixed plate 1. The fan-shaped flap 2 includes a reverse pressure relief fan-shaped component 21 and a forward pressure relief fan-shaped component 22. The reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 are arranged back to back. The fan-shaped flap 2 has a normally closed state, a forward open state, and a reverse open state. Figure 1This is a schematic diagram of the fan-shaped flap 2 in its normally closed state. Figure 5 and Figure 6 This is a schematic diagram showing the fan-shaped flap 2 in the forward-opening state. Figure 7 This is a schematic diagram of the fan-shaped flap 2 in the reverse open state. It should be noted that any state in which gas can sequentially enter another space through the connecting port 11 and the pressure relief port can be considered as the open state. Figure 5 and Figure 6 Specifically, the fan-shaped flap 2 is located at its maximum open position in the forward-opening state. Figure 7 Specifically, the fan-shaped flap 2 is located at its maximum opening position in the reverse opening state. In order to reduce manufacturing costs and improve the symmetry of the structure, the fan-shaped flap 2 can adopt a modular splicing structure, that is, the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 included therein have the same structure and size. The two can be fixedly connected back to back by rivets, or they can be fixedly connected by the following methods: bolt and nut assembly, buckle, or directly by welding or integral molding process. Figure 3 The diagram shows a schematic of the reverse pressure relief fan-shaped component 21. Furthermore, the fan-shaped flap 2 can be hinged to the fixed plate 1, a structure that is relatively simple to implement and has a low cost.

[0082] In the normally closed state, the anti-rotation brake restricts the rotation of the fan-shaped flap 2, causing the fan-shaped flap 2 to block the communication port 11 of the fixed plate 1, thereby separating the first space L and the second space R. When subjected to a positive gas impact from the second space R and overcoming the restriction of the anti-rotation brake, the fan-shaped flap 2 can rotate to the positive opening state, so that the positive gas can be discharged through the positive pressure relief hole 221 provided on the positive pressure relief fan-shaped component 22. When subjected to a reverse gas impact from the first space L and overcoming the restriction of the anti-rotation brake, the fan-shaped flap 2 can rotate to the reverse opening state, so that the reverse gas can be discharged through the reverse pressure relief hole 211 provided on the reverse pressure relief fan-shaped component 21.

[0083] like Figure 1 As shown, the direction of the forward gas is from the second space R to the first space L, and the direction of the reverse gas is from the first space L to the second space R.

[0084] As can be seen from the above description, in the normally closed state, the first space L and the second space R are not connected. Therefore, gas in the first space L cannot enter the second space R, and gas in the second space R cannot enter the first space L. One of the first space L and the second space R can be a pressure relief chamber of a switchgear or the space inside the door of a device requiring heat dissipation, while the other can be the external environment or a pressure relief chamber of another switchgear. The specific configuration can be determined according to actual needs. The purpose of this gas control device is to release gas from one space to the other. Specifically, the rotation of the fan-shaped flap 2 allows gas to pass through the pressure relief hole of one space to the connecting port 11, and ultimately to the other space. For the fan-shaped flap 2 to rotate, the gas in one space needs to reach a preset pressure. For example, if a short circuit occurs in the first space L, it will generate high-temperature, high-pressure gas, which can then drive the fan-shaped flap 2 to rotate and release the gas to the second space R; or, if the hot gas in the first space L accumulates to a certain pressure, this hot gas can drive the fan-shaped flap 2 to rotate and release the gas to the second space R.

[0085] The forward open state here means that at least part of the forward pressure relief sector 22 is located in the first space L and gas can be discharged from the forward pressure relief port 221. This state can be that part or all of the forward pressure relief port 221 is in operation. The reverse open state here means that at least part of the reverse pressure relief sector 21 is located in the second space R and gas can be discharged from the reverse pressure relief port 211. This state can be that part or all of the reverse pressure relief port 211 is in operation.

[0086] According to the present invention, by setting the fan-shaped flap 2, the physical impact force of the gas itself can be used as a driving source to overcome the resistance of the braking component and open, resulting in low cost. Moreover, it can realize bidirectional control of the gas, that is, the gas in the first space can enter the second space, and the gas in the second space can also enter the first space. In complex systems or equipment containing multiple independent spaces, regardless of whether the gas to be released comes from the first space or the second space, the gas can be automatically discharged to the adjacent normal space through this device, making full use of the adjacent space for pressure buffering.

[0087] As an example, the fan-shaped flap 2 includes at least one closed panel 231. Both the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 include an arc-shaped base plate 232 and two end panels 233. The arc-shaped base plate 232 is connected to one edge of the closed panel 231, and the two end panels 233 are respectively connected to the longitudinal ends of the closed panel 231 and the arc-shaped base plate 232. The closed panel 231, the arc-shaped base plate 232, and the two end panels 233 together form a [missing information - likely a specific structure or feature]. The groove-shaped structure with an opening on one side has a reverse pressure relief hole 211 disposed on the arc-shaped base plate 232 of the reverse pressure relief fan-shaped component 21, and a forward pressure relief hole 221 disposed on the arc-shaped base plate 232 of the forward pressure relief fan-shaped component 22. The reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 share the same closed panel 231; or, the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 each have a closed panel 231, and the two closed panels 231 are disposed back to back. In one implementation, the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 have the same structure, both including a closed panel 231, an arc-shaped base plate 232, and two end panels 233. When fixed, the two closed panels 231 are fixed to achieve a back-to-back fixation between the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22. Using the same structure facilitates material management and processing. In another implementation, the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 share a single closed panel 231, which saves materials. Here, the closed panel 231, the arc-shaped base plate 232, and the two end panels 233 can be integrally formed, for example, by stamping and bending a sheet metal part. This structure is easy to implement.

[0088] In addition, the above structure uses an arc-shaped base plate 232, which allows the arc-shaped flap to rotate on both sides of the connecting port 11.

[0089] In its normally closed state, the sealing panel 231 seals the connection port 11, isolating the first space L and the second space R. The reverse pressure relief hole 211 and the forward pressure relief hole 221 are located in the first space L and the second space R, respectively. Due to the sealing effect of the sealing panel 231, gas in the second space R cannot reach the first space L through the forward pressure relief hole 221 and the connection port 11. Similarly, gas in the first space L cannot reach the second space R through the reverse pressure relief hole 211 and the connection port 11. This completely blocks the flow of dust and moisture between adjacent spaces.

[0090] For example, the positive anti-rotation brake 121 is provided in the first space L, and the reverse anti-rotation brake 122 is provided in the second space R.

[0091] As another example, both the reverse pressure relief sector component 21 and the forward pressure relief sector component 22 are provided with brake grooves 24. These brake grooves 24 are used to cooperate with anti-rotation brakes to limit the rotation of the reverse pressure relief sector component 21 and the forward pressure relief sector component 22. Figure 8 As shown, Figure 8 for Figure 1 The diagram shows another perspective of the gas control device, a partially enlarged schematic of the brake groove and anti-rotation brake in its normally closed state. The brake groove 24 is located on the arc-shaped base plate 232, specifically a through hole that matches the anti-rotation brake. The brake groove 24 is shown in conjunction with the positive anti-rotation brake 121, which can partially enter the brake groove 24. The reverse pressure relief sector component 21 experiences a certain resistance. When the thrust on the reverse pressure relief sector component 21 reaches a certain level, the positive anti-rotation brake 121 deforms, breaking free from the constraint of the brake groove 24, thereby causing the reverse pressure relief sector component 21 to rotate towards the first space L or the second space R. Similarly, the brake groove 24 cooperates with the reverse anti-rotation brake 122, indicating that the reverse anti-rotation brake 122 can partially enter the brake groove 24. The forward pressure relief sector component 22 experiences a certain resistance. When the thrust on the forward pressure relief sector component 22 reaches a certain level, the reverse anti-rotation brake 122 deforms and can break free from the restriction of the brake groove 24, thereby allowing the forward pressure relief sector component 22 to rotate. In the normally closed state, the forward anti-rotation brake 121 and the reverse anti-rotation brake 122 are respectively engaged in the brake groove 24. The presence of the brake groove 24 can improve the reliability of the gas control device. For example, it can prevent the reverse pressure relief sector component 21 and the forward pressure relief sector component 22 from malfunctioning under normal conditions or slight vibrations. Only when the gas pressure reaches a certain level, such as when a dangerous high pressure is generated during an explosion, will the forward anti-rotation brake 121 and the reverse anti-rotation brake 122 deform and retract, ensuring safety. When the fan-shaped flap 2 rotates to the forward open state and the amount of gas discharged decreases, the fan-shaped flap 2 will rotate towards the second space R. During this process, the brake groove 24 of the forward pressure relief fan-shaped component 22 engages with the forward anti-rotation brake 121 located in the first space L, so as to allow the gas in the second space to continue to be discharged through the forward pressure relief hole 221 until the discharge is complete. Afterwards, the fan-shaped flap 2 can be manually or electrically restored to the normally closed position. Similarly, when the fan-shaped flap 2 rotates to the reverse open state and the amount of gas discharged decreases, the fan-shaped flap 2 will rotate towards the first space L. During this process, the reverse anti-rotation brake 122 engages with the brake groove 24 located in the reverse pressure relief fan-shaped component 21, so as to allow the remaining gas in the first space L to continue to be discharged through the reverse pressure relief hole 211.

[0092] Furthermore, multiple braking grooves 24 are respectively provided on the rotation paths of the reverse pressure relief sector component 21 and the forward pressure relief sector component 22 to provide stop engagement when the reverse pressure relief sector component 21 and the forward pressure relief sector component 22 rotate to different angles. Figure 3 As shown, taking the reverse pressure relief fan-shaped component 21 as an example, two brake grooves 24 are provided on the same arc line of the rotation path. At each brake groove 24, the forward anti-rotation brake 121 can be embedded in the brake groove 24. The forward anti-rotation brake 121 deforms and disengages from the brake groove 24. The arrangement of multiple brake grooves 24 can both limit the rotation angle of the reverse pressure relief fan-shaped component 21 and decelerate it when it falls back. Figures 1 to 3 The diagram shows a case where there are two braking grooves 24 on the same arc. In reality, more braking grooves 24 can be provided, depending on actual needs. This way, even if the gas pressure decreases, the sector-shaped flap 2 can remain open due to the constraint of the braking grooves 24. Of course, the sector-shaped flap 2 can also be manually reset to the normally closed state later.

[0093] Figures 1 to 2 Both the reverse pressure relief sector component 21 and the forward pressure relief sector component 22 shown have three rows of brake grooves 24, respectively located in the middle and near both ends, which increases the reliability of braking. In actual operation, the number of rows of brake grooves 24 can be set according to actual needs.

[0094] As an example, the positive anti-rotation brake 121 includes a first extension plate 1211 and a first elastic protrusion 1212. The first extension plate 1211 is fixed to the fixed plate 1 and extends towards the first space L. The first elastic protrusion 1212 is fixed to the first extension plate 1211 and has a preset distance from the fixed plate 1. The first elastic protrusion 1212 is used to prevent the fan-shaped flap 2 from rotating, and deforms when subjected to a preset pressure from the positive gas impact from the second space R, so that the fan-shaped flap 2 can rotate towards the first space L. Specifically, the first elastic protrusion 1212 can be, for example, the V-shaped spring steel sheet shown in the figure, or a ball plunger with a built-in high-strength spring, or a rubber pad, which can be selected according to actual needs. The reverse anti-rotation brake 122 can have the same structure as the forward anti-rotation brake 121, specifically including a second extension plate 1221 and a second elastic protrusion 1222. The second extension plate 1221 is fixed to the fixed plate 1 and extends towards the second space R; the second elastic protrusion 1222 is fixed to the second extension plate 1221 and has a preset distance from the fixed plate 1. The second elastic protrusion 1222 is used to prevent the fan-shaped flap 2 from rotating, and deforms when subjected to a preset pressure from the reverse gas impact from the first space L, so that the fan-shaped flap 2 can rotate towards the second space R. This structure is easy to implement and has a low cost. The first extension plate 1211 and the second extension plate 1221 can both be stamped and bent from the raw material of the fixed plate 1, and this one-piece molding simplifies assembly.

[0095] The positions of the first extension plate 1211 and the second extension plate 1221 can be staggered, so that they can be bent from the raw material of the fixing plate 1 and formed as one piece without separate assembly.

[0096] Furthermore, the number of forward anti-rotation brake components 121 and reverse anti-rotation brake components 122 can be set according to actual needs. For example... Figure 2 As shown, there is one forward anti-wheel turn brake 121 and two reverse anti-wheel turn brakes 122. The forward anti-wheel turn brake 121 is located between the two reverse anti-wheel turn brakes 122. Alternatively, there can be two forward anti-wheel turn brakes 121 and one reverse anti-wheel turn brake 122. Figure 1 As shown, in the normally closed state, one positive anti-rotation brake 121 is located in the brake groove of the reverse pressure relief sector component 21, and two reverse anti-rotation brakes 122 are located in the brake groove of the positive pressure relief sector component 22.

[0097] As another example, both the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22 are provided with limiting flanges 25 on their edges. The limiting flange 25 on the forward pressure relief fan-shaped component 22 can abut against the fixing plate 1 to limit the rotation of the fan-shaped flap 2 to the maximum opening position in the forward opening state; the limiting flange 25 on the reverse pressure relief fan-shaped component 21 can abut against the fixing plate 1 to limit the rotation of the fan-shaped flap 2 to the maximum opening position in the reverse opening state. The setting of the limiting flange 25 can limit the maximum swing amplitude of the reverse pressure relief fan-shaped component 21 and the forward pressure relief fan-shaped component 22, preventing excessive airflow from causing the reverse pressure relief fan-shaped component 21 or the forward pressure relief fan-shaped component 22 to slam into other components, and can also control the direction of airflow. Figure 3 As shown, the bottom edge of the arc-shaped base plate 232 away from the closed panel 231 has a limiting flange 25, and the side edge of the end panel 233 away from the closed panel 231 also has a limiting flange 25.

[0098] As an example, such as Figure 4 and Figure 5 As shown, at the maximum opening position corresponding to the forward opening state, the brake groove 24 on the forward pressure relief fan-shaped component 22 can be embedded into the anti-rotation brake component located in the first space L, thereby further applying resistance to the arc-shaped flap to limit its movement. Similarly, at the maximum opening position corresponding to the reverse opening state, the brake groove 24 on the reverse pressure relief fan-shaped component 21 can be embedded into the anti-rotation brake component located in the second space R, thereby further applying resistance to the arc-shaped flap to limit its movement.

[0099] As another example, there are at least two reverse pressure relief holes 211 and at least two forward pressure relief holes 221. The figure only shows the cases where there are two reverse pressure relief holes 211 and two forward pressure relief holes 221. The connecting portion between the two pressure relief holes acts as a reinforcing rib, increasing the overall strength of the gas control device. This number allows for larger pressure relief holes, facilitating gas passage, and also ensures sufficient strength for the arc-shaped base plate 232. Specifically, the pressure relief holes can be arranged in an array, each being a large, strip-shaped hole. The combination of multiple large-area pressure relief holes and the guiding effect of the arc-shaped base plate 232 significantly improves pressure relief efficiency. Figure 3 As shown, the brake groove 24 can be set on the reinforcing rib, and the two ends of the arc-shaped base plate 232 near the end panel 233 are also respectively provided with brake grooves 24.

[0100] As an example, the gas control device also includes several mesh plates (not shown in the figure), which are respectively installed on the reverse pressure relief holes 211 and the forward pressure relief holes 221. For example, each reverse pressure relief hole 211 may have one mesh plate, and each forward pressure relief hole 221 may also have one mesh plate. The mesh plates can be high-strength metal woven mesh or perforated explosion-proof steel plates, and can be flexibly installed and removed from the inside of the arc-shaped base plate 232 by screws. This can improve the protection level of the gas control device, that is, while ensuring pressure relief, the mesh plates can effectively intercept metal spatter or burning debris generated by fault arcs. Of course, it is also possible to select some of the reverse pressure relief holes 211 and / or forward pressure relief holes 221 to install mesh plates, depending on actual needs.

[0101] As another example, Figure 9 It shows Figure 1 A schematic diagram of the hinge structure at point S. This hinge structure can be positioned as needed, allowing the fan-shaped flaps 2 to be rotatably connected to the fixed plate. The number of hinges can also be set according to actual needs, for example... Figure 1 Two hinged structures are shown. Specifically, a fixed support 31 is provided on the fixed plate 1, and a hinged support 32 is provided on the fan-shaped flap 2. A hinge shaft 33 passes through the fixed support 31 and the hinged support 32, or the hinge shaft 33 can be integrally formed on the hinged support 32, depending on actual needs. The fixed support 31 can be riveted to both ends of the upper edge of the communication port 11 of the fixed plate 1 by fixing rivets. The hinge shaft 33 can be a high-strength solid steel pin, and a high-temperature resistant self-lubricating bearing can be fitted on the outside. The hinged structure provides the fan-shaped flap 2 with an extremely stable and low-friction rotation center, ensuring that the fan-shaped flap 2 can still rotate smoothly without mechanical jamming when subjected to instantaneous impact force. Both the fixed support 31 and the hinged support 32 have mounting holes 34. Fasteners (such as rivets or bolts) can be inserted into the mounting holes 34 to fix the fixed support 31 to the fixed plate 1 and the hinged support 32 to the fan-shaped flap 2, respectively.

[0102] This invention also provides a switchgear. For a standalone switchgear, it includes a housing, a pressure relief chamber, and a gas control device according to any of the foregoing embodiments. The pressure relief chamber is located at the top of the housing, and the fixing plate 1 is a side plate of the pressure relief chamber. The interior of the switchgear is a second space R, and the exterior of the switchgear is a first space L. The first space L can be the atmospheric environment; however, in practice, many switchgears are used in parallel, so the first space L can also be the pressure relief chamber of adjacent switchgears. The gas control device can be distributed in various directions of the pressure relief chamber according to actual needs, for example, distributed in two opposite directions, or only one gas control device can be provided. Here, the fixing plate 1 can serve as a side plate of the pressure relief chamber, thus simplifying the structure. The bottom plate of the pressure relief chamber can have several elongated through holes to meet the protection requirements of the pressure relief chamber and the busbar compartment, cable compartment, or handcart compartment. Figure 10 As shown, the bottom plate of the pressure relief chamber can also be pre-formed with several release holes, each with several deformable parts 45 installed. When the deformable parts 45 are not deformed, they can act as a certain isolation plate. Each deformable part 45 can expose a release hole at the bottom of the pressure relief channel through its own deformation, allowing gas to pass through. When the deformable part 45 deforms, it can fold over to expose the release hole, that is, the communication area between the bottom plate of the pressure relief chamber and the box body is larger, and gas can enter the pressure relief chamber more quickly. As an example, one long side of the deformable part 45 is fixed to the bottom plate of the pressure relief chamber and covers the release hole. There are several first through holes on the side near the long side, and the several first through holes are arranged in one direction. The other long side has a fracture-prone structure that can break under the impact of high temperature and high pressure gas. Thus, due to the presence of the first through holes, when high temperature and high pressure gas appears, the deformable part 45 will break at the other long side and bend along the column of first through holes to expose the release hole. In this way, the sheet metal part at the bottom of the pressure relief channel will have several openings, which is conducive to a large amount of gas quickly entering the pressure relief channel.

[0103] In addition, a vent 43 can be provided on the side of the pressure relief chamber, with the vent 43 and the gas control device located on different side walls. A fan module (not shown in the figure) is also provided near the vent 43. The fan module can draw the gas from the pressure relief chamber out of the switchgear, further facilitating rapid gas discharge for heat dissipation and improving the overall safety performance of the switchgear. Furthermore, a one-way damper or a pressure-activated baffle device can be provided on the inner wall of the pressure relief chamber corresponding to the vent 43 to prevent fault gas from overflowing from the vent. This baffle device can adopt a structure from the prior art. For example, the baffle device includes a fixing part, a first deformable part, and a blocking part. The fixing part is fixedly connected to the inner side wall of the pressure relief chamber, the first deformable part is connected to the fixing part, and the blocking part is connected to the first deformable part. Gas in the pressure relief chamber can push the blocking part to deform the first deformable part when the pressure exceeds a threshold, thereby moving the blocking part from an open position of the open vent 43 to a blocked position of the vent 43. In this way, under normal conditions, the fan module can draw hot gas out of the chamber through the vent 43. In the event of a malfunction inside the housing, the vent 43 will be blocked by the shielding part, and the gas in the pressure relief chamber will flow out through the gas control device to relieve pressure. This can control the direction of gas flow and prevent injury to nearby personnel. The shielding part includes, for example, two baffles, which are arranged radially symmetrically.

[0104] The present invention also includes a switchgear system comprising at least two adjacent switchgear cabinets and at least one gas control device according to any of the foregoing embodiments. The tops of the adjacent switchgear cabinets form pressure relief channels, and the pressure relief chambers of each switchgear cabinet are connected to form the pressure relief channels. The gas control device is disposed within the pressure relief channels and is used to activate in the event of a fault in one of the switchgear cabinets and the generation of gas, directing the gas to be discharged into the pressure relief channels of the adjacent switchgear cabinets, thereby achieving rapid gas discharge. Figure 10 and Figure 11 As shown, for the same switchgear, two gas control devices are set opposite each other, and two adjacent switchgear share one gas control device.

[0105] like Figure 10 and Figure 11 The diagram shows two switchgear cabinets side-by-side. The pressure relief chambers at the top of the two adjacent switchgear cabinets form a pressure relief channel. Three gas control devices are shown in the diagram. The bottom of this pressure relief channel is a sheet metal part with several pre-formed slots 44 for heat dissipation. These slots 44 are formed, for example, by stamping the sheet metal part. Figure 10 and Figure 11A baffle plate 46 is provided corresponding to the strip-shaped hole 44. One long side of the baffle plate 46 is fixed to the bottom plate of the pressure relief channel by a fastener. A row of first through holes is provided near this long side, so that the baffle plate 46 can be bent at the row of first through holes. That is, the other long side of the baffle plate 46 maintains a certain distance from the bottom plate of the pressure relief channel. This allows the strip-shaped hole 44 to function as ventilation, and also allows the baffle plate 46 to cover the strip-shaped hole 44 when gas from an adjacent switchgear enters the pressure relief chamber, preventing gas from entering the switchgear enclosure and damaging the switchgear components. In addition, several release holes can be formed by stamping sheet metal parts, and deformable parts 45 can be provided on the release holes, so that some sheet metal parts can bend and deform under high pressure, exposing the release holes. The size, number, and position of the strip-shaped hole 44 and the release holes can be set according to actual needs, but must meet the protection level requirements. Figure 11 The image shows the deformable part 45 before it bends or deforms. When it does bend or deform, it resembles the state of the baffle plate 46 corresponding to the slot 44. That is, when the adjacent switchgear is functioning correctly, the slot 44 of this switchgear serves as ventilation, allowing hot air to enter the pressure relief chamber through the slot 44 and exit through the vent 43. When the adjacent switchgear malfunctions, gas enters the pressure relief chamber of this switchgear from the adjacent chamber. In this case, the baffle plate 46 deforms under the influence of the gas, covering the slot 44. Since the deformable part 45 also covers the release hole, gas is prevented from entering the switchgear housing. When this switchgear malfunctions, the deformable part 45 bends under the influence of the gas, exposing the release hole. This allows gas to quickly enter the pressure relief channel through the slot 44 and the release hole, achieving pressure relief.

[0106] The working process of the gas control device in this switchgear system is described in detail below. First switchgear A and second switchgear B are used side-by-side. First switchgear A is located on one side of second switchgear B, and the other side of second switchgear B can be another switchgear (not shown in the figure). If second switchgear B is a side cabinet, the side of the pressure relief chamber of second switchgear B away from first switchgear A can be a closed baffle to prevent gas from flowing from the pressure relief channel into the outside environment and harming personnel. A fixing plate 1 is provided between the first pressure relief chamber 41 of first switchgear A and the second pressure relief chamber 42 of second switchgear B. The fixing plate 1 has a connecting port 11. When the connecting port 11 is not blocked, the first pressure relief chamber 41 and the second pressure relief chamber 42 are connected. A gas control device is installed at the connecting port 11. In this example, the fixing plate 1 serves as a side plate for each pressure relief chamber, the pressure relief chamber of first switchgear A is the first space, and the pressure relief chamber of second switchgear B is the second space.

[0107] like Figure 4 and Figure 10 As shown, when neither switchgear malfunctions, the sector-shaped flap 2 of the gas control device is normally closed, blocking the connection port 11, thus preventing communication between the first pressure relief chamber 41 and the second pressure relief chamber 42. Figure 10 Taking the gas control device in the middle as an example, two reverse pressure relief holes (only two reverse pressure relief holes are shown in the figure, but the number of reverse pressure relief holes is not limited in practice and can be set according to actual needs) are located in the first pressure relief chamber 41, and two forward pressure relief holes (the number of forward pressure relief holes is not limited in practice and can be set according to actual needs) are located in the second pressure relief chamber 42. The middle forward anti-rotation brake 121 is engaged in the brake groove 24 of the reverse pressure relief fan-shaped component 21 that is closest to the closed panel 231, and the two reverse anti-rotation brakes 122 on the side are engaged in the brake groove 24 of the forward pressure relief fan-shaped component 22 that is closest to the closed panel 231.

[0108] In the event of a component failure inside the cabinet of the second switchgear B, a large amount of high-pressure, high-temperature gas is generated inside the cabinet. This gas will enter the pressure relief channel at the top. For example, the gas may force open the connection of the deformable part 45, causing the deformable part 45 to bend and expose the release hole. Figure 11 (Not shown in the diagram), so that the gas enters the pressure relief channel through the strip-shaped hole 44 and the release hole, reaching the gas control device. It should be noted that... Figure 11 This is primarily used to demonstrate the directional discharge state of the gas control device (fan-shaped flap 2) in the pressure relief channel when a fault occurs in an adjacent switchgear, triggered by gas pressure. For clarity and simplicity in the drawing structure, Figure 11 The deformable portion 45 at the bottom is shown in its initial state before bending or deformation. Those skilled in the art should understand that in the event of an actual malfunction and the generation of high-pressure, high-temperature gas, the deformable portion 45 will bend and deform under the impact of the gas, exposing the release hole (its bent shape is similar to the state of the baffle plate 46 corresponding to the strip hole 44 under pressure deformation), thereby allowing the gas to quickly enter the pressure relief channel.

[0109] Combination Figures 1 to 9For the gas control devices of the second switchgear B and the first switchgear A, when the gas pushes the gas control device from the second space to the first space, it needs to overcome the restriction of one positive anti-rotation brake 121 and two negative anti-rotation brakes 122 to rotate into the first pressure relief chamber 41. During this process, the area of ​​the positive pressure relief hole 221 in the first pressure relief chamber 41 gradually increases, and the gas release speed also gradually increases. The positive anti-rotation brake 121 in the first pressure relief chamber 41 will also be embedded into the positive pressure relief sector in sequence. In the two brake grooves 24 on component 22, and possibly reaching the maximum open position, the limiting flange 25 of the positive pressure relief sector component 22 abuts against the fixed plate 1, and the positive anti-rotation brake 121 may be located in the brake groove 24 on the positive pressure relief sector component 22 that is farther from the closed panel 231, thus playing a limiting role. Of course, at the maximum open position, it is not necessary for the positive anti-rotation brake 121 to be located in the brake groove 24 on the positive pressure relief sector component 22 that is farther from the closed panel 231; it can be selected according to actual needs. Gas can enter the first pressure relief chamber 41 through the positive pressure relief hole 221 to release pressure. After the gas in the second switchgear B is released and the fault is cleared, the fan-shaped flap 2 will flip into the second pressure relief chamber 42 due to its own gravity. During this process, the brake groove 24 of the forward pressure relief fan-shaped component 22, which is farther from the closed panel 231, first engages with the forward anti-rotation brake 121 located in the first space L, thereby reducing the speed. Then, due to gravity or manual intervention, the brake groove 24 of the forward pressure relief fan-shaped component 22, which is closer to the closed panel 231, engages with the forward anti-rotation brake 121, further reducing the speed. Finally, the brake groove 24 of the forward pressure relief fan-shaped component 22, which is closer to the closed panel 231, engages with the reverse anti-rotation brake 122. At the same time, the brake groove 24 of the reverse pressure relief fan-shaped component 21 also engages with the forward anti-rotation brake 121, achieving a reset. That is, this gas control device can be reused, saving costs.

[0110] For the gas control device on the side of the second switchgear B furthest from the first switchgear A, when the gas pushes the gas control device outward, it also needs to overcome the restriction of one positive anti-rotation brake 121 and two reverse anti-rotation brakes 122 to rotate into the pressure relief chamber of the adjacent switchgear on the other side. During this process, the area of ​​the reverse pressure relief hole 211 in the pressure relief chamber of the adjacent switchgear on the other side gradually increases, and the gas release speed also gradually accelerates. The reverse anti-rotation brake 122 in the pressure relief chamber of the switchgear on the other side of the second switchgear B will also be embedded into the two brake grooves 24 on the reverse pressure relief sector component 21 in sequence, and may reach the maximum opening position. At this time, the limiting flange 25 of the reverse pressure relief sector component 21 abuts against the fixing plate 1, and the reverse anti-rotation brake 122 is located in the brake groove 24 on the reverse pressure relief sector component 21 that is far away from the closed panel 231. Gas can enter the pressure relief chamber of the switchgear adjacent to the other side of the second switchgear B through the reverse pressure relief hole 211 to achieve pressure release. After the gas is released and the fault is cleared, the fan-shaped flap 2 will rotate back into the pressure relief chamber of the second switch cabinet B due to its own gravity. Its reset process is the same as described above, thus achieving reset.

[0111] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas control device, comprising: The fixed plate (1) is provided with a connecting port (11) and anti-rotation brake components distributed on both sides of the connecting port (11). The connecting port (11) is used to connect the first space (L) and the second space (R). A fan-shaped flap (2) is rotatably mounted on the fixed plate (1). The fan-shaped flap (2) includes a reverse pressure relief fan-shaped component (21) and a forward pressure relief fan-shaped component (22). The reverse pressure relief fan-shaped component (21) and the forward pressure relief fan-shaped component (22) are arranged back to back. The fan-shaped flap (2) has a normally closed state, a forward open state, and a reverse open state. In the normally closed state, the anti-rotation brake restricts the rotation of the fan-shaped flap (2), so that the fan-shaped flap (2) blocks the communication port (11) of the fixed plate (1), thereby separating the first space (L) and the second space (R). When subjected to a positive gas impact from the second space (R) and overcoming the limitation of the anti-rotation brake, the fan-shaped flap (2) can rotate to the positive opening state so that the positive gas can be discharged through the positive pressure relief hole (221) provided in the positive pressure relief fan-shaped component (22). When subjected to the impact of reverse gas from the first space (L) and overcoming the limitation of the anti-rotation brake, the fan-shaped flap (2) can rotate to the reverse opening state so that the reverse gas is discharged through the reverse pressure relief hole (211) provided on the reverse pressure relief fan-shaped component (21).

2. The gas control device according to claim 1, characterized by The fan-shaped flap (2) includes at least one closed panel (231). The reverse pressure relief fan-shaped component (21) and the forward pressure relief fan-shaped component (22) each include an arc-shaped base plate (232) and two end panels (233). The arc-shaped base plate (232) is connected to one edge of the closed panel (231). The two end panels (233) are respectively connected to the longitudinal ends of the closed panel (231) and the arc-shaped base plate (232). The closed panel (231), the arc-shaped base plate (232), and the two end panels (233) together form an opening on one side. The groove-shaped structure has a reverse pressure relief hole (211) on the arc-shaped bottom plate (232) of the reverse pressure relief fan-shaped component (21) and a forward pressure relief hole (221) on the arc-shaped bottom plate (232) of the forward pressure relief fan-shaped component (22). The reverse pressure relief fan-shaped component (21) and the forward pressure relief fan-shaped component (22) share the same closed panel (231); or, the reverse pressure relief fan-shaped component (21) and the forward pressure relief fan-shaped component (22) each have a closed panel (231), and the two closed panels (231) are arranged back to back.

3. The gas control device according to claim 2, characterized in that, In the normally closed state, the sealing panel (231) can seal the communication port (11), and the reverse pressure relief hole (211) and the forward pressure relief hole (221) are located in the first space (L) and the second space (R), respectively.

4. The gas control device of claim 1, wherein The reverse pressure relief fan-shaped part (21) and the positive pressure relief fan-shaped part (22) are provided with brake grooves (24) for cooperating with the anti-rotation brake to limit the rotation of the reverse pressure relief fan-shaped part (21) and / or the positive pressure relief fan-shaped part (22).

5. The gas control device according to claim 4, characterized by The reverse pressure relief fan-shaped part (21) and the positive pressure relief fan-shaped part (22) are provided with a plurality of brake grooves (24) on the rotation path, respectively, to provide stop cooperation when the reverse pressure relief fan-shaped part (21) and the positive pressure relief fan-shaped part (22) are rotated to different angles, respectively.

6. The gas control device of claim 1, wherein The positive anti-rotation brake (121) is arranged in the first space (L), and the positive anti-rotation brake (121) comprises: A first extension plate (1211) fixed to the fixed plate (1) and extending towards the first space (L); A first elastic protruding part (1212) fixed to the first extension plate (1211) and having a preset distance from the fixed plate (1), the first elastic protruding part (1212) is used to hinder the rotation of the fan-shaped flap (2), and is deformed when subjected to positive gas impact from the second space (R) to a preset pressure, so that the fan-shaped flap (2) can rotate towards the first space (L); And / or The reverse anti-rotation brake (122) is arranged in the second space (R), and the reverse anti-rotation brake (122) comprises: A second extension plate (1221) fixed to the fixed plate (1) and extending towards the second space (R); A second elastic protruding part (1222) fixed to the second extension plate (1221) and having a preset distance from the fixed plate (1), the second elastic protruding part (1222) is used to hinder the rotation of the fan-shaped flap (2), and is deformed when subjected to reverse gas impact from the first space (L) to a preset pressure, so that the fan-shaped flap (2) can rotate towards the second space (R).

7. The gas control device of claim 1, wherein The edges of the reverse pressure relief fan-shaped part (21) and the positive pressure relief fan-shaped part (22) are provided with limiting flanges (25); The limiting flange (25) on the positive pressure relief fan-shaped part (22) can abut against the fixed plate (1) to limit the rotation of the fan-shaped flap (2) to the maximum opening position in the positive opening state; The limiting flange (25) on the reverse pressure relief fan-shaped part (21) can abut against the fixed plate (1) to limit the rotation of the fan-shaped flap (2) to the maximum opening position in the reverse opening state.

8. The gas control device of claim 1, wherein The reverse pressure relief hole (211) has at least two, and the positive pressure relief hole (221) has at least two; and / or Further comprising a plurality of mesh plates arranged on the reverse pressure relief hole (211) and the positive pressure relief hole (221), respectively.

9. The gas control device according to any one of claims 1 to 8, characterized by, A fixed support (31) is provided on the fixed plate (1), and a hinge support (32) is provided on the fan-shaped flap (2). A hinge shaft (33) passes through the fixed support (31) and the hinge support (32).

10. Switchgear, including: Box; A pressure relief chamber is located at the top of the housing; At least one gas control device according to any one of claims 1-9, wherein the fixing plate (1) is a side plate of the pressure relief chamber.

11. Switchgear systems, including: At least two adjacent switch cabinets are arranged, and a pressure relief channel is formed on the top of the adjacent switch cabinets; At least one gas control device according to any one of claims 1-9, the gas control device being disposed within the pressure relief channel, and configured to activate in the event of a failure in one of the switchgear cabinets and the generation of gas, thereby directionally discharging the gas into the pressure relief channel of an adjacent switchgear cabinet.

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