A pressure relief arc extinguishing device and a pressure relief arc extinguishing method for power equipment cabinet

Abstract

The present invention belongs to the technical field of electric power equipment, and discloses a pressure relief and arc extinguishing device and a pressure relief and arc extinguishing method for an electric power equipment cabinet. The electric power equipment cabinet has a pressure relief port, and the pressure relief and arc extinguishing device includes a support frame, a pressure relief assembly, an arc extinguishing assembly, a trigger member and a linkage assembly. The support frame is arranged at the pressure relief port; the pressure relief assembly has a first position for blocking the pressure relief port and a second position for opening the pressure relief port, and can automatically switch from the first position to the second position under the action of high-pressure gas; the arc extinguishing assembly includes a cylinder body containing arc extinguishing gas and a driving plug slidably arranged in the cylinder body; the trigger member is connected to the driving plug through the linkage assembly. When the pressure relief assembly moves from the first position to the second position, the trigger member is triggered to move and drive the linkage assembly to drive the driving plug to move, so that the arc extinguishing gas in the cylinder body can pass to the pressure relief port. The use of this pressure relief and arc extinguishing device can automatically extinguish the arc while relieving pressure, thereby improving the stability and safety of the operation of the electric power equipment cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a pressure relief and arc extinguishing device and a pressure relief and arc extinguishing method for a power equipment cabinet. Background Art

[0002] A ring main unit (RMU) is an electrical device primarily used to open and close, control, and protect electrical equipment during power system operation. Over long-term use, RMUs can be susceptible to short-circuit failures due to factors such as short circuits, insulation aging, and human error. This can generate high-temperature, high-pressure gas and arcs within the RMU. To prevent damage to the RMU and surrounding equipment due to the inability of high-temperature, high-pressure gas to escape promptly, RMUs are often equipped with pressure relief devices. Furthermore, to prevent arcs from escaping with the gas and threatening the safety of surrounding equipment and operators, RMUs are often equipped with arc extinguishing devices.

[0003] However, the pressure relief device and arc extinguishing device of the existing ring network cabinet are mostly two independently controlled structures and cannot work synchronously. When the pressure relief device releases pressure, there is still a problem that the arc overflows the ring network cabinet along with the pressure relief gas, posing a threat to surrounding equipment and operators.

[0004] Therefore, there is an urgent need for a pressure relief and arc extinguishing device and a pressure relief and arc extinguishing method for an electric power equipment cabinet to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a pressure relief and arc extinguishing device and a pressure relief and arc extinguishing method for an electric power equipment cabinet, which can automatically extinguish the arc while releasing pressure, thereby improving the stability and safety of the operation of the electric power equipment cabinet.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In one aspect, a pressure relief and arc extinguishing device is provided, which is applied to a power equipment cabinet. The power equipment cabinet has a pressure relief port. The pressure relief and arc extinguishing device includes:

[0008] The supporting frame is arranged at the pressure relief port of the power equipment cabinet;

[0009] A pressure relief assembly is movably mounted on the support frame and has a first position for blocking the pressure relief port and a second position for opening the pressure relief port. The pressure relief assembly can automatically switch from the first position to the second position under the action of high-pressure gas flowing through the pressure relief port.

[0010] The arc extinguishing assembly is arranged on the support frame or the power equipment cabinet. The arc extinguishing assembly includes a cylinder body and a driving plug slidably arranged in the cylinder body. The cylinder body contains arc extinguishing gas, and the gas output end of the cylinder body can be connected to the pressure relief port;

[0011] The trigger member and the linkage assembly are movably arranged on the support frame and connected to the driving plug through the linkage assembly. When the pressure relief assembly moves from the first position to the second position, it can trigger the trigger member to move and drive the linkage assembly to drive the driving plug to move, so that the arc-extinguishing gas in the cylinder body can flow to the pressure relief port.

[0012] Optionally, the arc extinguishing assembly also includes a first elastic member, which is restricted between the driving plug and the inner wall of the cylinder body. A connecting shaft is provided on the driving plug, and the linkage assembly is detachably connected to the connecting shaft. When the linkage assembly is connected to the connecting shaft, the first elastic member is in a compressed energy storage state. When the linkage assembly is separated from the connecting shaft, the first elastic member releases elastic potential energy to enable the driving plug to move in the cylinder body.

[0013] Optionally, the linkage component includes:

[0014] A first linkage rod is fixedly connected to the trigger member, and the trigger member can drive the first linkage rod to move along a first direction;

[0015] a second linkage rod, wherein a first end of the second linkage rod is slidably connected to the first linkage rod in a second direction;

[0016] A first linkage frame is movably provided on the support frame along the second direction, and a first end of the first linkage frame is slidably connected to the second end of the second linkage rod in the first direction;

[0017] A second linkage frame is movably provided on the support frame or the power equipment cabinet along a third direction, a first end of the second linkage frame is slidably connected to the second end of the first linkage frame in the second direction, and a second end of the second linkage frame is detachably connected to the connecting shaft;

[0018] When the pressure relief assembly triggers the trigger member to move in the first direction, the first linkage rod can drive the first linkage frame to move in the second direction through the second linkage rod, and the first linkage frame drives the second linkage frame to move in the third direction to disengage from the connecting axis. The first direction, the second direction and the third direction are perpendicular to each other.

[0019] Optionally, a guide member is provided on the support frame, and a first guide groove extending obliquely is provided on the guide member, a sliding shaft is provided at the second end of the second linkage rod, and a first slide groove extending along the first direction is provided at the first end of the first linkage frame. The sliding shaft passes through the first slide groove and the first guide groove, and slides with the first slide groove and the first guide groove at the same time. When the second linkage rod moves along the first direction, the sliding shaft can drive the first linkage frame to move along the second direction under the action of the groove wall of the first guide groove.

[0020] Optionally, a second guide groove is provided at the second end of the first linkage frame, and a sliding portion is provided at the first end of the second linkage frame. The sliding portion is located in the second guide groove and slides with the second guide groove in the second direction. When the first linkage frame moves along the second direction, the sliding portion can drive the second linkage frame to move along the third direction and disengage from the connecting shaft under the action of the groove wall of the second guide groove;

[0021] A first support is provided on the power equipment cabinet or support frame, and a second linkage frame is slidably provided on the first support along a third direction. A second elastic member extending along the third direction is provided on the second linkage frame, and the second elastic member is restricted between the second linkage frame and the first support. A locking portion is provided at the second end of the second linkage frame, and a card slot is provided on the connecting shaft. The locking portion can move along the third direction under the elastic force of the second elastic member to engage with the card slot.

[0022] Optionally, a third elastic member extending along the first direction is provided between the first linkage rod and the support frame, a push inclined surface is provided on the trigger member, and the trigger member has an avoidance position for avoiding the pressure relief component and a support position for limiting the pressure relief component to the second position;

[0023] When the pressure relief component moves to contact the push inclined surface, it can push the trigger member to move along the first direction toward the avoidance position and deform the third elastic member;

[0024] When the pressure relief assembly moves to disengage from the push inclined surface, the first linkage rod can drive the trigger member to move along the first direction toward the supporting position under the elastic force of the third elastic member.

[0025] Optionally, the pressure relief assembly includes a plurality of pressure relief plates arranged in sequence along the second direction. When in the first position, the plurality of pressure relief plates are assembled to block the pressure relief port. A rotating shaft is provided at the first end of each pressure relief plate along the second direction, and a third guide groove extending obliquely is provided on the support frame. The rotating shaft is rotatably engaged with the third guide groove and can be slidably engaged with the third guide groove in the extension direction of the third guide groove. The pressure relief plate can be rotated and switched between the first position and the second position.

[0026] Optionally, the pressure relief assembly further includes a connecting frame, and the second end of each pressure relief plate along the second direction is rotatably connected to the connecting frame, and the multiple pressure relief plates can be synchronously moved and switched with the connecting frame between the first position and the second position.

[0027] Optionally, the arc extinguishing assembly further includes an exhaust duct arranged on the support frame, the exhaust duct having an air inlet and several exhaust ports, the air inlet is connected to the gas output end of the cylinder body, and the several exhaust ports are connected to the pressure relief port and are located upstream of the pressure relief assembly.

[0028] On the other hand, a method for pressure relief and arc extinguishing of an electric power equipment cabinet is provided. The method adopts the pressure relief and arc extinguishing device described above. The method comprises the following steps:

[0029] Install the pressure relief and arc extinguishing device at the pressure relief port of the power equipment cabinet;

[0030] Filling arc extinguishing gas into the cylinder of the arc extinguishing assembly;

[0031] When the air pressure in the power equipment cabinet exceeds a set threshold, the pressure relief assembly moves from the first position to the second position under the action of the high-pressure gas flowing through the pressure relief port to open the pressure relief port;

[0032] During the movement of the pressure relief assembly from the first position to the second position, the trigger member can be triggered to move relative to the support frame, and the trigger member drives the linkage assembly to drive the driving plug to move in the cylinder body, so that the driving plug squeezes the arc-extinguishing gas in the cylinder body to the pressure relief port.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a pressure relief arc extinguishing device and a pressure relief arc extinguishing method for an electric power equipment cabinet. When in the first position, the pressure relief component can block the pressure relief port, so that when the air pressure in the electric power equipment cabinet does not exceed a set threshold, the arc cannot overflow through the pressure relief port, effectively preventing the arc from overflowing and ensuring the safety of equipment and personnel around the electric power equipment cabinet during daily use. When the air pressure in the electric power equipment cabinet exceeds the set threshold, the generated high-pressure gas can act on the pressure relief component through the pressure relief port and drive the pressure relief component to switch from the first position to the second position. The pressure relief component will gradually release the blockage of the pressure relief port, allowing the high-pressure gas to smoothly escape to the outside of the pressure relief arc extinguishing device, preventing damage to the electric power equipment cabinet and surrounding equipment. When the pressure relief assembly switches from the first position to the second position, the pressure relief assembly triggers the trigger member to move, thereby driving the linkage assembly to drive the driving plug to move in the cylinder body. The driving plug can transport the arc-extinguishing gas in the cylinder body to the pressure relief port to eliminate the arc overflowing through the pressure relief port, ensuring the safety of equipment and personnel around the power equipment cabinet during the pressure relief process, and also enabling automatic arc extinguishing during pressure relief, thereby improving the stability and safety of the power equipment cabinet operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of an electric power equipment cabinet equipped with the pressure relief and arc extinguishing device provided by the present invention;

[0036] Figure 2 This is a structural diagram of the pressure relief and arc extinguishing device provided by the present invention (with the grid plate hidden);

[0037] Figure 3 This is a structural diagram of the arc extinguishing assembly of the pressure relief arc extinguishing device provided by the present invention (with the driving plug hidden);

[0038] Figure 4This is an exploded view of the arc extinguishing assembly of the pressure relief arc extinguishing device provided by the present invention;

[0039] Figure 5 It is a structural schematic diagram of the support frame and linkage components of the pressure relief and arc extinguishing device provided by the present invention;

[0040] Figure 6 This is an exploded view of the linkage assembly of the pressure relief and arc extinguishing device provided by the present invention (the second linkage frame is hidden);

[0041] Figure 7 It is a structural schematic diagram of the second linkage frame of the pressure relief and arc extinguishing device provided by the present invention;

[0042] Figure 8 This is an exploded view of the support frame, pressure relief assembly and grid plate of the pressure relief and arc extinguishing device provided by the present invention;

[0043] Figure 9A yes Figure 8 Enlarged view of point A in the middle;

[0044] Figure 9B yes Figure 8 Enlarged view of point B in the middle;

[0045] Figure 10 The present invention provides a flow chart of a method for pressure relief and arc extinguishing in a power equipment cabinet.

[0046] In the picture:

[0047] 100. Pressure relief and arc extinguishing device; 200. Power equipment cabinet;

[0048] 1. Support frame; 11. First connecting ear; 12. Guide member; 13. First guide groove; 14. Perforation; 15. Third guide groove;

[0049] 2. Pressure relief assembly; 21. Pressure relief plate; 211. Cylindrical shaft; 22. Rotating shaft; 23. Connecting frame; 231. Second connecting ear;

[0050] 3. Arc extinguishing assembly; 31. Cylinder body; 311. Guide hole; 32. Drive plug; 321. Sealing groove; 33. First elastic member; 34. Connecting shaft; 341. Groove; 342. Clamping groove; 343. Guide slope; 35. Exhaust duct; 351. First pipe; 352. Second pipe; 353. Third pipe; 36. Inlet pipe; 37. Exhaust pipe;

[0051] 4. Trigger; 41. Pushing inclined surface;

[0052] 5. Linkage assembly; 51. First linkage rod; 52. Second linkage rod; 521. Sliding shaft; 522. Sliding sleeve; 53. First linkage frame; 531. First slide groove; 532. Third linkage rod; 533. Fourth linkage rod; 534. Second guide groove; 54. Second linkage frame; 541. Sliding portion; 542. Locking portion; 543. First connecting rod; 544. Second connecting rod; 545. Abutting shaft; 546. Connecting sleeve; 55. Guide sleeve; 56. Second elastic member; 57. Sliding hole;

[0053] 6. Grille plate;

[0054] 7. First support;

[0055] 8. a third elastic member;

[0056] 9. Install the ring. DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0058] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0059] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0061] Example 1

[0062] like Figure 1 As shown in FIG9 , this embodiment provides a pressure relief and arc extinguishing device 100 , which is applied to a power equipment cabinet 200 and can automatically extinguish arcs while releasing pressure, thereby improving the stability and safety of the operation of the power equipment cabinet 200 .

[0063] See Figure 1 、 Figure 2 and Figure 4 The power equipment cabinet 200 has a pressure relief port (not shown in the figure). The pressure relief arc extinguishing device 100 includes a support frame 1, a pressure relief component 2, an arc extinguishing component 3, a trigger 4 and a linkage component 5. The support frame 1 is arranged at the pressure relief port of the power equipment cabinet 200; the pressure relief component 2 is movably arranged on the support frame 1 and has a first position for blocking the pressure relief port and a second position for opening the pressure relief port. The pressure relief component 2 can automatically switch from the first position to the second position under the action of the high-pressure gas flowing through the pressure relief port; the arc extinguishing component 3 is arranged on the support frame 1 or power equipment cabinet 200, the arc extinguishing assembly 3 includes a cylinder body 31 and a driving plug 32 slidably arranged in the cylinder body 31, the cylinder body 31 contains arc extinguishing gas, and the gas output end of the cylinder body 31 can be connected to the pressure relief port; the trigger member 4 is movably arranged on the support frame 1 and is connected to the driving plug 32 through the linkage assembly 5. When the pressure relief assembly 2 moves from the first position to the second position, it can trigger the trigger member 4 to move and drive the linkage assembly 5 to drive the driving plug 32 to move, so that the arc extinguishing gas in the cylinder body 31 is passed to the pressure relief port.

[0064] When the pressure relief and arc extinguishing device 100 provided in this embodiment is in the first position, the pressure relief assembly 2 can block the pressure relief port, so that when the air pressure in the power equipment cabinet 200 does not exceed the set threshold, the arc cannot overflow through the pressure relief port, effectively preventing the arc from overflowing and ensuring the safety of equipment and personnel around the power equipment cabinet 200 during daily use. When the air pressure in the power equipment cabinet 200 exceeds the set threshold, the generated high-pressure gas can act on the pressure relief assembly 2 through the pressure relief port, driving the pressure relief assembly 2 to switch from the first position to the second position. The pressure relief assembly 2 will gradually release the blockage of the pressure relief port, allowing the high-pressure gas to be smoothly discharged to the outside of the pressure relief and arc extinguishing device 100, preventing damage to the power equipment cabinet 200 and surrounding equipment. When the pressure relief component 2 switches from the first position to the second position, the pressure relief component 2 triggers the trigger member 4 to move, thereby driving the linkage component 5 to drive the driving plug 32 to move in the cylinder body 31. The driving plug 32 can transport the arc extinguishing gas in the cylinder body 31 to the pressure relief port to eliminate the arc overflowing through the pressure relief port, thereby ensuring the safety of equipment and personnel around the power equipment cabinet 200 during the pressure relief process, and also enabling automatic arc extinguishing during pressure relief, thereby improving the stability and safety of the operation of the power equipment cabinet 200.

[0065] See Figure 1 and Figure 2 In this embodiment, the cross-sectional shape of the pressure relief port (not shown in the figure) is rectangular, the support frame 1 is a rectangular frame matching the pressure relief port, and an installation space connected to the pressure relief port is formed inside the support frame 1. The pressure relief assembly 2 is located in the installation space, and the arc extinguishing assembly 3 and the linkage assembly 5 are both located outside the installation space.

[0066] For example, the support frame 1 is provided with a first connecting lug 11, and a bolt passes through the first connecting lug 11 and is fastened to the side wall of the power equipment cabinet 200, so as to firmly fix the support frame 1 to the power equipment cabinet 200 and facilitate the subsequent replacement of the pressure relief arc extinguishing device 100, which is convenient and quick to operate. Figure 2 , the support frame 1 along its width ( Figure 2 First connecting ears 11 are provided on both sides of the support frame 1 (in the X direction), and two first connecting ears 11 are provided on each side, so that the support frame 1 can be stably fixed on the power equipment cabinet 200.

[0067] Furthermore, a grid plate 6 (such as Figure 1 As shown, the grid plate 6 is located on the side of the pressure relief assembly 2 facing away from the pressure relief port. High-pressure gas ejected from the pressure relief port can be discharged to the outside of the pressure relief and arc extinguishing device 100 through the holes in the grid plate 6. The provision of the grid plate 6 can prevent debris or dust from entering the installation space, preventing debris or dust from accumulating in the installation space and affecting the movement of the pressure relief assembly 2.

[0068] For example, the grid plate 6 is connected to the support frame 1 by bolts, which is convenient for assembly and disassembly and has a firm connection.

[0069] Optionally, see Figure 1 、 Figure 3 and Figure 4 The arc extinguishing assembly 3 further includes a first elastic member 33, which is constrained between the driving plug 32 and the inner wall of the cylinder body 31. The driving plug 32 is provided with a connecting shaft 34, and the linkage assembly 5 is detachably connected to the connecting shaft 34. When the linkage assembly 5 is connected to the connecting shaft 34, the first elastic member 33 is in a compressed energy storage state. When the linkage assembly 5 is separated from the connecting shaft 34, the first elastic member 33 releases elastic potential energy to enable the driving plug 32 to move in the cylinder body 31. Figure 4 In the direction, during the process of introducing arc-extinguishing gas into the cylinder body 31, the driving plug 32 is subjected to the upward supporting force of the arc-extinguishing gas, the driving plug 32 moves upward and drives the first elastic member 33 to deform, and the first elastic member 33 generates a downward elastic force on the driving plug 32. Since the upward supporting force is greater than the downward elastic force, the driving plug 32 can continue to move upward; in the process of the driving plug 32 continuously moving upward, the difference between the supporting force and the elastic force will gradually decrease. When the linkage component 5 is connected to the connecting shaft 34, the driving plug 32 is subjected to the upward restraining force of the linkage component 5 through the connecting shaft 34. At this time, the restraining force and the supporting force jointly balance the elastic force of the first elastic member 33, so that the driving plug 32 can remain motionless; when the linkage component 5 is separated from the connecting shaft 34, the restraining force disappears. At this time, the elastic force of the first elastic member 33 is greater than the supporting force, so that the driving plug 32 can automatically move downward.

[0070] The linkage assembly 5 is connected to the drive plug 32 via the connecting shaft 34. The linkage assembly 5 can then control the position of the drive plug 32 by controlling the position of the connecting shaft 34, allowing the pressure relief assembly 2 to establish a linkage relationship with the drive plug 32 via the trigger 4 and the linkage assembly 5. Specifically, when the linkage assembly 5 is connected to the connecting shaft 34, the linkage assembly 5 can lock the position of the connecting shaft 34, and the drive plug 32 will not move, allowing the arc-extinguishing gas to be stored in the cylinder body 31. When the linkage assembly 5 is driven by the trigger 4 to disengage from the connecting shaft 34, the connecting shaft 34 is no longer subject to the upward constraint force of the linkage assembly 5. That is, the drive plug 32 is now only subject to the elastic force and the supporting force. In the current state, the elastic force of the first elastic member 33 is greater than the supporting force, allowing the drive plug 32 to move downward under the action of the elastic force. During the downward movement of the drive plug 32, a downward squeezing force is generated on the arc-extinguishing gas, thereby transporting the arc-extinguishing gas stored in the cylinder body 31 to the pressure relief port.

[0071] See Figure 4In this embodiment, the gas output end of the cylinder body 31 is arranged at the bottom of the cylinder body 31, and the first elastic member 33 is a spring, and its two ends are respectively connected to the top of the driving plug 32 and the upper inner wall of the cylinder body 31. When the arc extinguishing gas is introduced into the cylinder body 31, the driving plug 32 is pushed toward the upper inner wall of the cylinder body 31 ( Figure 4 When the spring moves in the positive direction (Z in the center), it is compressed and deformed, and has elastic potential energy.

[0072] Further, see Figure 4 The connecting shaft 34 is connected to the driving plug 32 at one end and extends into the cylinder body 31. It slides with the cylinder body 31, so that the connecting shaft 34 can move relative to the cylinder body 31 along with the driving plug 32. At the same time, it can reduce the friction between the connecting shaft 34 and the cylinder body 31, making the movement of the driving plug 32 smoother. Specifically, a guide hole 311 is provided on the cylinder body 31, and the connecting shaft 34 is passed through the guide hole 311. The connecting shaft 34 is provided with a groove 341 extending along its moving direction. A slider (not shown in the figure) is convexly provided on the inner wall of the guide hole 311 and slides with the groove 341. The provision of the guide hole 311 enables the connecting shaft 34 to always move in the vertical direction, preventing the connecting shaft 34 from deviating and causing the driving plug 32 to move poorly.

[0073] Furthermore, a sealing ring is provided on the driving plug 32, and the driving plug 32 is sealedly connected to the inner wall of the cylinder body 31 through the sealing ring to prevent the arc extinguishing gas from leaking from the cylinder body 31. Figure 4 The sealing ring (not shown in the figure) is a rubber ring, the cylinder body 31 is a cylinder, the cross section of the driving plug 32 is circular, the cross section of the rubber ring is annular, and a sealing groove 321 is recessed on the driving plug 32. The rubber ring is clamped in the sealing groove 321, and the rubber ring part protrudes from the surface of the driving plug 32, so that the rubber ring can fully contact the inner wall of the cylinder body 31 to ensure the sealing effect.

[0074] Optionally, see Figure 5 and Figure 6 The linkage assembly 5 includes a first linkage rod 51, a second linkage rod 52, a first linkage frame 53 and a second linkage frame 54. The first linkage rod 51 is fixedly connected to the trigger member 4, and the trigger member 4 can drive the first linkage rod 51 along the first direction ( Figure 5 The first end of the second linkage rod 52 moves with the first linkage rod 51 in the second direction ( Figure 5 The first linkage frame 53 is movably provided on the support frame 1 along the second direction, and the first end of the first linkage frame 53 is slidably connected to the second end of the second linkage rod 52 in the first direction; the second linkage frame 54 is movably provided on the support frame 1 along the second direction; Figure 5The first end of the second linkage frame 54 is slidably connected to the second end of the first linkage frame 53 in the second direction, and the second end of the second linkage frame 54 is detachably connected to the connecting shaft 34.

[0075] When the pressure relief assembly 2 triggers the trigger member 4 to move in the first direction, the first linkage rod 51 can drive the first linkage frame 53 to move in the second direction via the second linkage rod 52, and the first linkage frame 53 can drive the second linkage frame 54 to move in the third direction and disengage from the connecting shaft 34. The first direction, the second direction, and the third direction are perpendicular to each other. In this arrangement, the pressure relief assembly 2 can sequentially drive the driving plug 32 to move via the trigger member 4, the first linkage rod 51, the second linkage rod 52, the first linkage frame 53, the second linkage frame 54, and the connecting shaft 34, thereby establishing a linkage relationship between the pressure relief assembly 2 and the arc extinguishing assembly 3. This allows for automatic arc extinguishing during pressure relief, thereby improving the stability and safety of the operation of the power equipment cabinet 200. The first direction is the width of the support frame 1, the second direction is the height of the support frame 1, and the third direction is the thickness of the support frame 1.

[0076] Optionally, see Figure 5 and Figure 6 The support frame 1 is provided with a guide member 12, and the guide member 12 is provided with a first guide groove 13 extending obliquely. The second end of the second linkage rod 52 is provided with a sliding shaft 521, and the first end of the first linkage frame 53 is provided with a first sliding groove 531 extending along the first direction. The sliding shaft 521 is penetrated by the first sliding groove 531 and the first guide groove 13, and at the same time slides with the first sliding groove 531 and the first guide groove 13. When the second linkage rod 52 moves along the first direction, the sliding shaft 521 can drive the first linkage frame 53 to move along the second direction under the action of the groove wall of the first guide groove 13. The setting of the first guide groove 13 enables the second linkage rod 52 to move along the first direction and the second direction at the same time; the setting of the first sliding groove 531 enables the first linkage frame 53 to not move along the first direction while the second linkage rod 52 moves along the first direction, so that the first linkage frame 53 can only move along the second direction; the setting of the sliding shaft 521 enables the second linkage rod 52 to slide and cooperate with the first sliding groove 531 and the first guide groove 13 at the same time, and then the second linkage rod 52 can drive the first linkage frame 53 to move along the second direction under the drive of the first linkage rod 51.

[0077] See Figure 5 and Figure 6In this embodiment, the first linkage rod 51 is located on one side of the support frame 1 along the first direction, the first linkage rod 51 extends along the second direction and is fixedly connected to the two trigger members 4, and the two trigger members 4 are arranged at intervals along the length direction of the first linkage rod 51, so that the trigger member 4 can fully drive the first linkage rod 51 when it moves; the second linkage rod 52 extends along the first direction and is located on one side of the support frame 1 along the second direction. The first end of the second linkage rod 52 is provided with a sliding sleeve 522 extending along the second direction, and the first linkage rod 51 is inserted into the sliding sleeve 522 and slides with the sliding sleeve 522; the inclination direction of the first guide groove 13 is set at an angle to the first direction and the second direction, and the two ends of the sliding shaft 521 are respectively inserted into the first guide groove 13 and the first sliding groove 531.

[0078] Furthermore, the linkage assembly 5 includes two first linkage rods 51 and two second linkage rods 52. The two first linkage rods 51 correspond one-to-one with the two second linkage rods 52 and are symmetrically arranged on the support frame 1 along the first direction. The first linkage frame 53 includes a third linkage rod 532 extending along the first direction and a fourth linkage rod 533 extending along the second direction. Both ends of the third linkage rod 532 are provided with a first slide groove 531. The two first slide grooves 531 correspond one-to-one with the two second linkage rods 52. The first end of the fourth linkage rod 533 is fixedly connected to the third linkage rod 532, and the second end is slidably engaged with the second linkage frame 54. When the second linkage rod 52 moves, it can drive the third linkage rod 532 to move in the second direction. The third linkage rod 532 drives the second linkage frame 54 to move in the third direction through the fourth linkage rod 533. The setting of the two first linkage rods 51 and the two second linkage rods 52 enables the pressure relief assembly 2 to simultaneously trigger the first linkage rod 51 and the second linkage rod 52 on both sides of the support frame 1 to drive the first linkage frame 53 and the second linkage frame 54 to move when the pressure relief port is opened, so that the separation efficiency of the second linkage frame 54 and the connecting shaft 34 is higher, thereby ensuring the synchronization of pressure relief and arc extinguishing.

[0079] In other embodiments, the cylinder body 31 and the first linkage frame 53 are spaced apart along the first direction, and the second linkage frame 54 is movably provided on the support frame 1 along the first direction.

[0080] In this embodiment, a guide sleeve 55 is fixed on the outer wall of the cylinder body 31, and the fourth linkage rod 533 is movably inserted into the guide sleeve 55. The guide sleeve 55 can not only limit the moving direction of the fourth linkage rod 533, but also support the fourth linkage rod 533 along the second direction to prevent the fourth linkage rod 533 from bending.

[0081] Optionally, see Figure 2 、 Figure 5 and Figure 7The second end of the first linkage frame 53 is provided with a second guide groove 534, and the first end of the second linkage frame 54 is provided with a sliding portion 541. The sliding portion 541 is located in the second guide groove 534 and slides with the second guide groove 534 in the second direction. When the first linkage frame 53 moves along the second direction, the sliding portion 541 can drive the second linkage frame 54 to move along the third direction under the action of the groove wall of the second guide groove 534, so that the second linkage frame 54 is separated from the connecting shaft 34. The power equipment cabinet 200 (such as Figure 1 As shown) or the support frame 1 is provided with a first support 7, a second linkage frame 54 is slidably provided on the first support 7 along the third direction, a second elastic member 56 extending along the third direction is provided on the second linkage frame 54, the second elastic member 56 is limited between the second linkage frame 54 and the first support 7, and a locking portion 542 is provided at the second end of the second linkage frame 54, see Figure 4 A slot 342 is provided on the connecting shaft 34 , and the locking portion 542 can move along the third direction to engage with the slot 342 under the elastic force of the second elastic member 56 , so that the locking portion 542 can be stably connected to the slot 342 .

[0082] Specifically, when the first linkage frame 53 moves in the second direction, the groove wall of the second guide groove 534 slides relative to the sliding portion 541 and pushes the sliding portion 541 to move in the third direction. The second linkage frame 54 moves together with the sliding portion 541, thereby driving the locking portion 542 to move in a direction away from the locking groove 342 ( Figure 5 The locking portion 542 moves away from the card slot 342, and the connecting shaft 34 can move; the locking portion 542 moves in the direction away from the card slot 342 ( Figure 5 When the second elastic member 56 moves in the negative direction of Y, it is compressed and deformed, and elastic potential energy is accumulated, so that the locking portion 542 has the ability to move toward the slot 342 ( Figure 5 When the arc extinguishing gas is filled into the cylinder body 31, the connecting shaft 34 is driven by the drive plug 32 along Figure 4 When the middle Z moves in the positive direction and moves to the point where the slot 342 is opposite to the locking portion 542, the locking portion 542 can move in the direction close to the slot 342 ( Figure 5 The Y-axis moves forward (in the positive direction) to engage with the slot 342 to ensure that the locking portion 542 can be firmly clamped in the slot 342.

[0083] Further, see Figure 4 and Figure 7 The connecting shaft 34 is provided with an inclined guide slope 343 on the side away from the driving plug 32. When the arc-extinguishing gas is injected into the cylinder body 31, the driving plug 32 can drive the connecting shaft 34 in the direction away from the gas output end of the cylinder body 31 under the action of the arc-extinguishing gas ( Figure 4The locking portion 542 contacts the guide slope 343 and moves in the direction away from the connecting shaft 34 (Z positive direction) under the push of the guide slope 343. Figure 4 As the connecting shaft 34 moves, the locking portion 542 moves from the guide slope 343 to contact the side wall of the connecting shaft 34 until the locking portion 542 is engaged with the slot 342.

[0084] See Figure 7 In this embodiment, the second linkage frame 54 includes two first connecting rods 543 that are movably arranged along the third direction on the first support 7, the sliding portion 541 and the locking portion 542 are respectively arranged at both ends of the first connecting rod 543, the sliding portion 541 extends along the first direction, the two first connecting rods 543 are respectively arranged at both ends of the sliding portion 541, the first support 7, the two first connecting rods 543 and the sliding portion 541 are jointly surrounded to form a sliding hole 57, the second end of the fourth linkage rod 533 passes through the sliding hole 57, the second guide groove 534 is recessed on the side of the fourth linkage rod 533 facing the sliding portion 541, and the side wall of the second guide groove 534 is inclined. Figure 6 In the orientation, the upper groove wall of the second guide groove 534 faces away from the connecting shaft 34 (combined with Figure 3 ) direction, so that when the fourth linkage rod 533 moves downward in the second direction, the upper groove wall of the second guide groove 534 contacts the sliding portion 541 and pushes the sliding portion 541 away from the connecting shaft 34 along the third direction (combined with Figure 3 ) moves, the sliding portion 541 drives the locking portion 542 to move along the third direction through the first connecting rod 543 and disengage from the slot 342.

[0085] Further, see Figure 7The locking portion 542 has two ends fixedly connected to the two first connecting rods 543, a second connecting rod 544 extending in the first direction is disposed between the two first connecting rods 543, and the second connecting rod 544 is spaced apart from the first support 7 along the third direction. An abutting shaft 545 extending in the third direction is disposed on the side of the second connecting rod 544 facing the first support 7, and a connecting sleeve 546 extending in the third direction is disposed on the side of the first support 7 facing the second connecting rod 544. The end of the abutting shaft 545 away from the second connecting rod 544 extends into the connecting sleeve 546 and is slidably connected to the connecting sleeve 546. The second elastic member 56 is located within the connecting sleeve 546, and its two ends are respectively connected to the end of the abutting shaft 545 extending into the connecting sleeve 546 and the side of the first support 7 facing the second connecting rod 544. The connecting sleeve 546 can limit the expansion and contraction direction of the second elastic member 56, so that the elastic force of the second elastic member 56 can only be applied in the third direction, and thus the locking portion 542 can also only move in the third direction. When the locking portion 542 moves along the third direction and disengages from the locking slot 342, the first connecting rod 543 moves along the third direction and drives the abutting shaft 545 toward the first support 7 ( Figure 7 The Y negative direction in the figure) slides relative to the connecting sleeve 546, the length of the abutting shaft 545 extending into the connecting sleeve 546 increases, and the second elastic member 56 is compressed; when the connecting shaft 34 moves along Figure 4 When Z in the middle moves in the positive direction until the slot 342 is opposite to the locking portion 542, the second elastic member 56 automatically extends, and the abutment shaft 545 slides relative to the connecting sleeve 546 under the elastic force of the second elastic member 56, and the length of the abutment shaft 545 extending into the connecting sleeve 546 is reduced.

[0086] For example, see Figure 7 The sliding portion 541 and the locking portion 542 are both rollers, and the second elastic member 56 is a spring. The sliding portion 541 is configured as a roller, so that when the sliding portion 541 slides relative to the second guide groove 534, the roller rotates, thereby reducing the friction between the sliding portion 541 and the groove wall of the second guide groove 534, so that when the second guide groove 534 moves in the second direction, it can easily drive the sliding portion 541 to move in the third direction, and can also reduce the wear between the sliding portion 541 and the second guide groove 534; the locking portion 542 is configured as a roller, which can reduce the friction between the locking portion 542 and the side wall of the connecting shaft 34 and the guide inclined surface 343, reducing the wear between the locking portion 542 and the connecting shaft 34.

[0087] In this embodiment, first support 7 is fixed to the side wall of cylinder block 31. Cylinder block 31 is fixed to the side wall of power equipment cabinet 200 and positioned above support frame 1. Specifically, mounting ring 9 is fixed to the side wall of power equipment cabinet 200. Mounting ring 9 is sleeved over cylinder block 31 and forms an interference fit with cylinder block 31, tightening cylinder block 31 and firmly securing it to power equipment cabinet 200.

[0088] For example, see Figure 2 Two mounting rings 9 are provided on the side wall of the power equipment cabinet 200. The two mounting rings 9 are spaced apart along the height direction of the cylinder body 31 to ensure that the cylinder body 31 is firmly fixed to the power equipment cabinet 200. In other embodiments, the first support 7 can also be fixed above the support frame 1.

[0089] Optionally, see Figure 2 、 Figure 5 and Figure 6 A third elastic member 8 extending along the first direction is provided between the first linkage rod 51 and the support frame 1, and a resisting inclined surface 41 is provided on the trigger member 4, and the trigger member 4 has an avoidance position avoiding the pressure relief component 2 and a support position limiting the pressure relief component 2 to the second position; when the pressure relief component 2 moves from the first position to the second position, the pressure relief component 2 gradually contacts the resisting inclined surface 41 and moves along the resisting inclined surface 41. During the movement, the pressure relief component 2 can resist the trigger member 4 and move toward the avoidance position along the first direction ( Figure 5 In the X direction in FIG, the trigger member 4 drives the first linkage rod 51 to move in the first direction, thereby deforming the third elastic member 8. When the pressure relief assembly 2 moves away from the inclined surface 41, the trigger member 4 and the first linkage rod 51 are no longer subject to external forces, the third elastic member 8 gradually recovers its deformation, and the first linkage rod 51, under the elastic force of the third elastic member 8, drives the trigger member 4 to move in the first direction toward the support position. This arrangement not only allows the pressure relief assembly 2 to be connected to the arc extinguishing assembly 3 via the trigger member 4 and the linkage assembly 5, thus forming a linkage relationship with the arc extinguishing assembly 3, but also allows the pressure relief assembly 2 to be limited to the second position, and the pressure relief port can remain open to continuously discharge high-pressure gas.

[0090] Exemplarily, the third elastic member 8 is a spring, a through hole 14 is provided on the side wall of the support frame 1, the trigger member 4 is movably provided in the through hole 14, the first linkage rod 51 is located on the outside of the support frame 1, the first end of the trigger member 4 is fixedly connected to the first linkage rod 51, and the second end extends to the interior of the support frame 1, and the push slope 41 is provided at the second end of the trigger member 4.

[0091] Optionally, see Figure 8The pressure relief assembly 2 includes a plurality of pressure relief plates 21 arranged in sequence along the second direction. In the first position, the plurality of pressure relief plates 21 are assembled to block the pressure relief port. A rotating shaft 22 is provided at the first end of each pressure relief plate 21 along the second direction. The support frame 1 is provided with a third guide slot 15 extending obliquely. The rotating shaft 22 is rotatably engaged with the third guide slot 15 and can slide with the third guide slot 15 in the extension direction of the third guide slot 15. The pressure relief plate 21 can be rotated and switched between the first position and the second position. The plurality of pressure relief plates 21 are provided, so that the size of each pressure relief plate 21 is small. That is, when the air pressure value in the power equipment cabinet 200 is higher than the set pressure value, the pressure relief plate 21 is more easily rotated and opened, thereby timely opening the pressure relief port of the power equipment cabinet 200, and preventing the air pressure value in the power equipment cabinet 200 from continuously increasing, thereby threatening the safety of the power equipment cabinet 200 and its surrounding environment. When the high pressure gas drives the pressure relief plate 21 to rotate, the rotating shaft 22 rotates together with the pressure relief plate 21, and the pressure relief plate 21 also has the function of moving in the direction away from the pressure relief port ( Figure 8 The arrangement of the rotating shaft 22 and the third guide groove 15 allows the pressure relief plate 21 to have a margin for moving in a direction away from the pressure relief port, thereby reducing the impact force of the high-pressure gas on the pressure relief plate 21, playing a buffering role, and avoiding damage to the pressure relief plate 21 and the rotating shaft 22.

[0092] See Figure 8 In this embodiment, the first end of the pressure relief plate 21 is the vertical upper end of the pressure relief plate 21. The pressure relief plate 21 rotates about the rotating shaft 22 located at the first end. The third guide slot 15 extends upward in a direction away from the pressure relief port. The third guide slot 15 is provided on the inner sides of the two side walls of the support frame 1 that are opposite each other in the first direction. The rotating shaft 22 extends in the first direction, and its two ends extend into the corresponding third guide slots 15 on both sides. In the first position, the plane on which the pressure relief plate 21 is located is parallel to the plane on which the pressure relief port is located. When high-pressure gas acts on the pressure relief assembly 2, the pressure relief plate 21 rotates about the rotating shaft 22 and moves along the extension direction of the third guide slot 15. The plane on which the pressure relief plate 21 is located forms an angle with the plane on which the pressure relief port is located, thereby gradually opening the pressure relief port and allowing the high-pressure gas to escape.

[0093] Furthermore, two trigger members 4 are provided on each side wall of the support frame 1 along the first direction, and the two trigger members 4 on each side wall correspond one-to-one to the two pressure relief plates 21 at both ends of the pressure relief assembly 2 along the second direction, so as to increase the driving effect of the pressure relief assembly 2 on the first linkage rod 51.

[0094] For example, see Figure 8 Six pressure relief plates 21 are provided along the height direction of the support frame 1 , and six third guide grooves 15 are correspondingly provided on each side wall of the support frame 1 .

[0095] In other embodiments, the pressure relief assembly 2 includes a plurality of pressure relief plates 21 sequentially arranged along a first direction, and the rotating shaft 22 is arranged at a first end of the pressure relief plate 21 along the first direction.

[0096] Optionally, see Figure 8 The pressure relief assembly 2 further includes a connecting frame 23. The second end of each pressure relief plate 21 along the second direction is rotatably connected to the connecting frame 23. The multiple pressure relief plates 21 can be synchronously moved and switched with the connecting frame 23 between the first position and the second position. The multiple pressure relief plates 21 have different positions in the second direction. Under the action of high-pressure gas, the multiple pressure relief plates 21 may have different rotation angles. The setting of the connecting frame 23 can connect the multiple pressure relief plates 21 into a whole, so that the multiple pressure relief plates 21 can rotate at the same angle at the same time, realizing synchronous movement and switching between the first position and the second position. In the second position, the multiple pressure relief plates 21 can fully open the pressure relief port. In the first position, the multiple pressure relief plates 21 can be spliced ​​together to block the pressure relief port.

[0097] In this embodiment, the pressure relief plate 21 rotates in a direction away from the pressure relief port, and the connecting frame 23 is located on the side of the pressure relief plate 21 away from the pressure relief port. Figure 9A and Figure 9B A plurality of second connecting ears 231 are provided on the connecting frame 23, and a cylindrical shaft 211 is provided at the second end of each pressure relief plate 21 along the second direction. The cylindrical shaft 211 passes through the second connecting ear 231 and rotates with the second connecting ear 231. When the pressure relief plate 21 rotates, the cylindrical shaft 211 and the second connecting ear 231 rotate relative to each other, and the connecting frame 23 rotates relative to the pressure relief plate 21. Any two adjacent pressure relief plates 21 can remain parallel under the action of the connecting frame 23. As the pressure relief plate 21 rotates, the side wall of the pressure relief plate 21 along the first direction gradually contacts the resisting inclined surface 41 and pushes the trigger member 4 to move, and the trigger member 4 moves to the avoidance position; when the pressure relief plate 21 rotates to a certain angle, the side wall of the pressure relief plate 21 separates from the resisting inclined surface 41, and the trigger member 4 is in the avoidance position at this time; then, the trigger member 4 will move from the avoidance position to the supporting position under the action of the third elastic member 8; in the supporting position, the trigger member 4 is located on the side of the connecting frame 23 facing the pressure relief port, and the connecting frame 23 contacts the side wall of the trigger member 4 along the third direction. The trigger member 4 limits the rotation angle of the pressure relief plate 21 through the connecting frame 23, thereby limiting the pressure relief plate 21 to the second position.

[0098] Optionally, see Figure 2 and Figure 3The arc-extinguishing assembly 3 also includes an exhaust duct 35 disposed on the support frame 1. The exhaust duct 35 has an air inlet and several exhaust ports. The air inlet is connected to the gas output end of the cylinder body 31, and the several exhaust ports are connected to the pressure relief port and are located upstream of the pressure relief assembly 2. During the process of high-pressure gas being transported from the pressure relief port to the pressure relief assembly 2, it is first subjected to the action of the arc-extinguishing gas. This allows the arc that escapes along with the high-pressure gas to be extinguished by the arc-extinguishing gas before the high-pressure gas is released, effectively preventing the arc from escaping and ensuring the safety and stability of the power equipment cabinet 200. When multiple exhaust ports are provided, the arc-extinguishing gas can be simultaneously transported from the multiple exhaust ports to the upstream of the pressure relief assembly 2, thereby extinguishing the arc from multiple locations simultaneously and improving the arc-extinguishing effect.

[0099] For example, see Figure 2 and Figure 3 The cylinder body 31 is disposed outside the support frame 1. The exhaust duct 35 includes a first tube 351 and two second tubes 352. Both the first tube 351 and the second tube 352 are located outside the support frame 1. The first tube 351 extends in a first direction and communicates with the gas output end of the cylinder body 31. The second tube 352 extends in a second direction and communicates with the first tube 351. The two second tubes 352 are symmetrically arranged on either side of the support frame 1 along the first direction. A third tube 353 is disposed on the second tube 352. One end of the third tube 353 communicates with the second tube 352, and the other end passes through the support frame 1 and connects to the pressure relief port. The arc-extinguishing gas is sequentially transported to the pressure relief port via the first tube 351, the second tube 352, and the third tube 353. Furthermore, multiple pressure relief plates 21 are provided. Each second tube 352 is provided with the same number of third tubes 353 as the pressure relief plates 21. The multiple third tubes 353 on each second tube 352 correspond one-to-one with multiple pressure relief plates 21, thereby improving the arc-extinguishing effect.

[0100] See Figure 3 In this embodiment, the arc-extinguishing assembly 3 further includes an air inlet pipe 36 and an air outlet pipe 37. The two ends of the air inlet pipe 36 are respectively connected to the cylinder body 31 and the external air pumping device, while the two ends of the air outlet pipe 37 are respectively connected to the gas output end of the cylinder body 31 and the first pipe 351. The arc-extinguishing gas generated by the external air pumping device can be transported into the cylinder body 31 through the air inlet pipe 36 and transported to the exhaust pipe 35 through the air outlet pipe 37. Furthermore, a one-way valve is provided on each of the air inlet pipe 36 and the air outlet pipe 37, so that the air inlet pipe 36 and the air outlet pipe 37 can only transport gas in one direction, thereby preventing the arc-extinguishing gas in the cylinder body 31 from escaping from the air inlet pipe 36 and preventing high-pressure gas from entering the cylinder body 31 through the air outlet pipe 37.

[0101] In some embodiments, arc-extinguishing gas is delivered to the cylinder 31 via the air inlet pipe 36 before the air pressure in the power equipment cabinet 200 reaches a set threshold. Once the air pressure in the power equipment cabinet 200 exceeds the set threshold, the arc-extinguishing gas stored in the cylinder 31 immediately extinguishes the arc. Furthermore, if personnel detect a high-pressure gas leak from the power equipment cabinet 200, arc-extinguishing gas can be continuously added to the cylinder 31 during the leak process to ensure effective arc extinguishing.

[0102] Example 2

[0103] like Figure 10 As shown, this embodiment provides a method for pressure relief and arc extinguishing of an electric power equipment cabinet. The pressure relief and arc extinguishing device 100 of the first embodiment is used, which can automatically extinguish the arc while releasing pressure, thereby improving the stability and safety of the operation of the electric power equipment cabinet 200.

[0104] The method for pressure relief and arc extinguishing of a power equipment cabinet comprises the following steps:

[0105] Install the pressure relief arc extinguishing device 100 at the pressure relief port of the power equipment cabinet 200;

[0106] Filling arc extinguishing gas into the cylinder 31 of the arc extinguishing assembly 3;

[0107] When the air pressure in the power equipment cabinet 200 exceeds a set threshold, the pressure relief assembly 2 moves from the first position to the second position under the action of the high-pressure gas flowing through the pressure relief port to open the pressure relief port;

[0108] When the pressure relief assembly 2 moves from the first position to the second position, it can trigger the trigger member 4 to move relative to the support frame 1, and the trigger member 4 drives the linkage assembly 5 to drive the driving plug 32 to move in the cylinder body 31, so that the driving plug 32 squeezes the arc-extinguishing gas in the cylinder body 31 to pass to the pressure relief port.

[0109] Specifically, the pressure relief arc extinguishing device 100 is installed at the pressure relief port of the power equipment cabinet 200 by bolts. When there is no arc extinguishing gas stored in the cylinder body 31, the connecting shaft 34 and the locking portion 542 are in a separated state, and the locking portion 542 is located above the connecting shaft 34; Figure 4In the middle position, when arc-extinguishing gas is filled into the cylinder body 31 through the air inlet, the air pressure in the cylinder body 31 increases, driving the driving plug 32 and the connecting shaft 34 upward. The locking portion 542 gradually contacts the guide slope 343 and moves away from the connecting shaft 34 under the push of the guide slope 343. The second elastic member 56 is compressed and deformed, and the connecting shaft 34 continues to move upward. The locking portion 542 contacts the side wall of the connecting shaft 34. When the locking groove 342 moves to face the locking portion 542, the locking portion 542 engages with the locking groove 342 under the elastic force of the second elastic member 56. At this time, arc-extinguishing gas is stored in the cylinder body 31, and the multiple pressure relief plates 21 are assembled to block the pressure relief port.

[0110] Specifically, when the air pressure in the power equipment cabinet 200 exceeds the set threshold, the high-pressure gas acts on the pressure relief plate 21 through the pressure relief port, the pressure relief plate 21 rotates, and drives the connecting frame 23 to move, the side wall of the pressure relief plate 21 contacts the push inclined surface 41 and pushes the trigger member 4 to move along the first direction, the trigger member 4 drives the first linkage rod 51 to move along the first direction, the third elastic member 8 is deformed, the first linkage rod 51 drives the second linkage rod 52 to move along the first guide groove 13, the second linkage rod 52 drives the third linkage rod 532 to move along the second direction, and the third linkage rod 532 drives the fourth linkage rod 5 33 moves along the second direction, the side wall of the second guide groove 534 on the fourth linkage rod 533 contacts the sliding part 541 and pushes the sliding part 541 to move along the third direction, the sliding part 541 drives the locking part 542 to move along the third direction through the first connecting rod 543, the locking part 542 disengages from the slot 342, and the driving plug 32 moves downward under the elastic force of the first elastic member 33, and the arc extinguishing gas in the cylinder body 31 is transported to the pressure relief port through the outlet pipe 37, the first pipe 351, the second pipe 352 and the third pipe 353 in sequence to eliminate the arc and prevent the arc from overflowing with the high-pressure gas. When the pressure relief plate 21 rotates to a certain angle, the trigger member 4 moves to the avoidance position, separating the pressure relief plate 21 from the trigger member 4. Simultaneously, the trigger member 4 automatically moves from the avoidance position to the support position under the elastic force of the third elastic member 8. The connecting bracket 23 contacts the trigger member 4, and the pressure relief plate 21 is then restrained in the second position via the connecting bracket 23, so that the pressure relief port remains open, allowing high-pressure gas to continuously escape, ensuring the stability and safety of the operation of the power equipment cabinet 200. The set threshold is determined by the operating conditions of the power equipment cabinet 200. As long as the set threshold is reached and the high-pressure gas is released, the equipment inside the power equipment cabinet 200 will not be damaged.

[0111] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure relief arc extinguishing device, applied to a power equipment cabinet (200), characterized in that: The power equipment cabinet (200) has a pressure relief port, and the pressure relief arc extinguishing device (100) comprises: A support frame (1) is arranged at the pressure relief port of the power equipment cabinet (200); a pressure relief assembly (2) movably arranged on the support frame (1) and having a first position for blocking the pressure relief port and a second position for opening the pressure relief port, wherein the pressure relief assembly (2) can automatically switch from the first position to the second position under the action of high-pressure gas flowing through the pressure relief port; An arc extinguishing assembly (3) is arranged on a side wall of the power equipment cabinet (200) and located above the support frame (1), or the arc extinguishing assembly (3) is arranged on the support frame (1); the arc extinguishing assembly (3) includes a cylinder body (31) and a driving plug (32) slidably arranged in the cylinder body (31), the cylinder body (31) contains arc extinguishing gas, and the gas output end of the cylinder body (31) can be connected to the pressure relief port, and the driving plug (32) is provided with a connecting shaft (34); A triggering member (4), the triggering member (4) being movably arranged on the supporting frame (1); A linkage assembly (5) comprises a first linkage rod (51), a second linkage rod (52), a first linkage frame (53) and a second linkage frame (54), wherein the first linkage rod (51) is fixedly connected to the trigger member (4), and the trigger member (4) can drive the first linkage rod (51) to move along a first direction; a first end of the second linkage rod (52) is slidably connected to the first linkage rod (51) in a second direction; the first linkage frame (53) is movably arranged on the support frame (1) along the second direction, and the first end of the first linkage frame (53) is slidably connected to the second end of the second linkage rod (52) in the first direction; the second linkage frame (54) is movably arranged on the support frame (1) along a third direction, and the first end of the second linkage frame (54) is slidably connected to the second end of the first linkage frame (53) in the second direction, and the second end of the second linkage frame (54) is detachably connected to the connecting shaft (34); When the pressure relief assembly (2) moves from the first position to the second position, it can trigger the trigger member (4) to move along the first direction, and the first linkage rod (51) can drive the first linkage frame (53) to move along the second direction through the second linkage rod (52), and the first linkage frame (53) drives the second linkage frame (54) to move along the third direction and disengage from the connecting shaft (34), and the connecting shaft (34) drives the driving plug (32) to move, so that the arc-extinguishing gas in the cylinder body (31) flows to the pressure relief port, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The pressure relief and arc extinguishing device according to claim 1, characterized in that: The arc extinguishing assembly (3) further includes a first elastic member (33), the first elastic member (33) being constrained between the driving plug (32) and the inner wall of the cylinder body (31); when the linkage assembly (5) is connected to the connecting shaft (34), the first elastic member (33) is in a compressed energy storage state; when the linkage assembly (5) is separated from the connecting shaft (34), the first elastic member (33) releases elastic potential energy to enable the driving plug (32) to move in the cylinder body (31).

3. The pressure relief and arc extinguishing device according to claim 1, characterized in that: The support frame (1) is provided with a guide member (12), and the guide member (12) is provided with a first guide groove (13) extending obliquely. The second end of the second linkage rod (52) is provided with a sliding shaft (521), and the first end of the first linkage frame (53) is provided with a first slide groove (531) extending along the first direction. The sliding shaft (521) is passed through the first slide groove (531) and the first guide groove (13), and is slidably matched with the first slide groove (531) and the first guide groove (13). When the second linkage rod (52) moves along the first direction, the sliding shaft (521) can drive the first linkage frame (53) to move along the second direction under the action of the groove wall of the first guide groove (13).

4. The pressure relief and arc extinguishing device according to claim 1, characterized in that: A second guide groove (534) is provided at the second end of the first linkage frame (53), and a sliding portion (541) is provided at the first end of the second linkage frame (54). The sliding portion (541) is located in the second guide groove (534) and slides with the second guide groove (534) in the second direction. When the first linkage frame (53) moves along the second direction, the sliding portion (541) can drive the second linkage frame (54) to move along the third direction and disengage from the connecting shaft (34) under the action of the groove wall of the second guide groove (534); The support frame (1) is provided with a first support (7), the second linkage frame (54) is slidably provided on the first support (7) along the third direction, the second linkage frame (54) is provided with a second elastic member (56) extending along the third direction, the second elastic member (56) is restricted between the second linkage frame (54) and the first support (7), a locking portion (542) is provided at the second end of the second linkage frame (54), a card slot (342) is provided on the connecting shaft (34), and the locking portion (542) can move along the third direction under the elastic force of the second elastic member (56) to engage with the card slot (342).

5. The pressure relief and arc extinguishing device according to claim 1, characterized in that: A third elastic member (8) extending along the first direction is provided between the first linkage rod (51) and the support frame (1); a push-pushing inclined surface (41) is provided on the trigger member (4); and the trigger member (4) has an avoidance position for avoiding the pressure relief component (2) and a support position for limiting the pressure relief component (2) to the second position; When the pressure relief component (2) moves to contact the push inclined surface (41), it can push the trigger member (4) to move along the first direction toward the avoidance position and deform the third elastic member (8); When the pressure relief assembly (2) moves to disengage from the push inclined surface (41), the first linkage rod (51) can drive the trigger member (4) to move along the first direction toward the support position under the elastic force of the third elastic member (8).

6. The pressure relief and arc extinguishing device according to any one of claims 1 to 5, characterized in that: The pressure relief assembly (2) includes a plurality of pressure relief plates (21) arranged in sequence along the second direction. When in the first position, the plurality of pressure relief plates (21) are assembled to block the pressure relief port. A rotating shaft (22) is provided at the first end of each pressure relief plate (21) along the second direction. A third guide groove (15) extending obliquely is provided on the support frame (1). The rotating shaft (22) is rotatably engaged with the third guide groove (15) and can be slidably engaged with the third guide groove (15) in the extension direction of the third guide groove (15). The pressure relief plate (21) can be rotatably switched between the first position and the second position.

7. The pressure relief and arc extinguishing device according to claim 6, characterized in that: The pressure relief assembly (2) further comprises a connecting frame (23), wherein the second end of each pressure relief plate (21) along the second direction is rotatably connected to the connecting frame (23), and the plurality of pressure relief plates (21) can be synchronously moved and switched with the connecting frame (23) between the first position and the second position.

8. The pressure relief and arc extinguishing device according to any one of claims 1 to 5, characterized in that: The arc extinguishing assembly (3) further comprises an exhaust pipe (35) arranged on the support frame (1), the exhaust pipe (35) having an air inlet and a plurality of exhaust ports, the air inlet being connected to the gas output end of the cylinder body (31), and the plurality of exhaust ports being connected to the pressure relief port and being located upstream of the pressure relief assembly (2).

9. A method for pressure relief and arc extinguishing of a power equipment cabinet, characterized in that: Using the pressure relief and arc extinguishing device (100) according to any one of claims 1 to 8, the pressure relief and arc extinguishing method for a power equipment cabinet comprises the following steps: Installing the support frame (1) at the pressure relief port of the power equipment cabinet (200); Filling the arc-extinguishing gas into the cylinder body (31) of the arc-extinguishing assembly (3); When the air pressure in the power equipment cabinet (200) exceeds a set threshold, the pressure relief component (2) moves from the first position to the second position under the action of high-pressure gas flowing through the pressure relief port, thereby opening the pressure relief port; When the pressure relief assembly (2) moves from the first position to the second position, it can trigger the trigger member (4) to move relative to the support frame (1), and the trigger member (4) drives the linkage assembly (5) to drive the driving plug (32) to move in the cylinder body (31), so that the driving plug (32) squeezes the arc-extinguishing gas in the cylinder body (31) to pass to the pressure relief port.

Images