Anti-arc valve and switch cabinet

Abstract

The utility model belongs to the field of switchgear, specifically refers to a kind of arc-resistant valve and switch cabinet.The switch cabinet includes arc-resistant valve, and arc-resistant valve is used to rotate and connect in the communicating port side of switch cabinet compartment with mandrel as rotating center, and sealing reinforcing structure for matching the sealing cooperation structure of at least one side of communicating port is equipped on arc-resistant valve, to when arc occurs in switch cabinet compartment, arc-resistant valve self-adapting rotates to close communicating port and makes sealing reinforcing structure and sealing cooperation structure constitute labyrinth seal structure.Labyrinth seal structure is set between arc-resistant valve and compartment, and the sealing effect of arc-resistant valve to arc is strengthened, high-temperature and high-pressure gas generated by arc is guided by labyrinth seal structure, is buffered and unloads most impact force, so that the destructive power of gas that breaks out of compartment is greatly reduced or even disappears, the arc resistance of compartment is improved, and damage to equipment and operating personnel caused by arc spreading outward along gap is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear, and in particular relates to a fire-resistant arc-resistant valve and switch cabinet. Background Technology

[0002] To meet the arc resistance requirements of switchgear, existing switchgear typically has a rotatable door between adjacent compartments to prevent arc from leaking from a faulty compartment to other compartments, thereby preventing safety accidents.

[0003] For example, Chinese invention patent application CN103490310A discloses an automatic control device for preventing arc leakage in the ventilation duct of a cable compartment. This device includes a closing limiting frame fixed inside the cable compartment ventilation duct near the front of the cabinet. A rotating shaft is installed on the ventilation duct inside the closing limiting frame, and a partition is rotatably connected to the shaft. A torsion spring is also fitted on the shaft, with its two torsion arms contacting the partition and the closing limiting frame respectively, keeping the partition and the closing limiting frame normally open. A limiting wedge is provided on the ventilation duct inside the partition to limit the extreme position of the partition's open state. When an arc occurs in the cable compartment, the partition is compressed, overcoming the spring force of the torsion spring, and presses tightly against the surface of the closing limiting frame, achieving a seal on the cable compartment and ensuring ventilation during normal operation.

[0004] Although the above-mentioned automatic control device for preventing arc leakage in the ventilation duct of the cable room can realize the anti-arc function of the cable room, the following problems still exist: the partition is a flat structure. When an arc occurs in the cable room, the arc may escape along the gap between the partition and the closed limit frame, which cannot effectively seal the cable room where the arc occurs. As a result, the hot gas, sparks and solid fragments carried by the arc may cause damage to the equipment and operators. Utility Model Content

[0005] The purpose of this invention is to provide an arc-resistant valve to solve the technical problem of poor arc resistance in existing anti-arc leakage devices. Another purpose of this invention is to provide a switch cabinet to solve the same technical problem.

[0006] To achieve the above objectives, the technical solution for the switchgear provided by this utility model is as follows: A switch cabinet includes a cabinet body with compartments enclosed by partitions. At least one pair of adjacent compartments have a connecting opening. A spindle is fitted at the connecting opening, and the spindle is connected to a rotatable arc-resistant valve. When an arc occurs in one of the compartments, the valve automatically rotates to close the connecting opening. The arc-resistant valve has a sealing reinforcement structure, and a sealing reinforcement member is connected to at least one side of the connecting opening. The sealing reinforcement member has a sealing fit structure that matches the sealing reinforcement structure, so that when an arc occurs in the compartment, the sealing reinforcement structure on the arc-resistant valve and the sealing fit structure on the sealing reinforcement member form a labyrinth-type sealing structure.

[0007] This utility model is an improved invention, and its beneficial effects are as follows: By setting a sealing reinforcement structure on the arc-resistant valve and connecting a sealing reinforcement member with a sealing fit structure to at least one side of the communication port, the arc-resistant valve can form a labyrinth-like sealing structure with the sealing reinforcement member when closing the compartment where an arc occurs. This enhances the sealing effect of the arc-resistant valve against the arc, thereby preventing the arc from spreading outward along the gaps and avoiding damage to equipment and operators caused by the hot gas, sparks, and solid fragments carried by the arc. Moreover, when an arc occurs in the compartment, some of the high-temperature and high-pressure gas generated by the arc directly impacts the surface of the arc-resistant valve, while another part of the high-temperature and high-pressure gas generated by the arc is buffered and most of the impact force is dissipated by the guidance of the labyrinth-like sealing structure. This greatly reduces or even eliminates the destructive force of the gas rushing out of the compartment, significantly improving the arc-resistant capability of the switchgear compartment.

[0008] As a further improvement, the sealing reinforcement includes a distal sealing reinforcement connected to the side of the communication port near the spindle and a proximal sealing reinforcement connected to the other side of the communication port. The sealing reinforcement structure includes a distal sealing reinforcement structure and a proximal sealing reinforcement structure spaced apart on the fire-resistant arc valve. The sealing mating structure includes a distal sealing mating structure on the distal sealing reinforcement that matches the distal sealing reinforcement structure, and a proximal sealing mating structure on the proximal sealing reinforcement that matches the proximal sealing reinforcement structure.

[0009] As a further improvement, the sealing reinforcement structure is a V-shaped groove on the fire-resistant arc valve, and the sealing fit structure is a V-shaped fit structure that matches the V-shaped groove.

[0010] As a further improvement, each of the two adjacent compartments is provided with a connecting opening, which is located on the horizontal and vertical partitions of the two adjacent compartments. The vertical and horizontal partitions form a corner, and the spindle is assembled at the corner. A labyrinth-type sealing structure is provided between the fire-resistant arc valve and the horizontal partition, which can seal the fire-resistant arc valve when it rotates to the position where it is in close contact with the horizontal partition. A labyrinth-type sealing structure is also provided between the fire-resistant arc valve and the vertical partition, which can seal the fire-resistant arc valve when it rotates to the position where it is in close contact with the vertical partition.

[0011] As a further improvement, the fire-resistant arc valve is provided with a distal V-groove and a proximal V-groove. A front sealing plate and a rear sealing plate are connected to the transverse partition, and a lower sealing plate is connected to the vertical partition. The front sealing plate is provided with a front V-shaped fitting structure for sealing with the distal V-groove, the rear sealing plate is provided with a rear V-shaped fitting structure for sealing with the proximal V-groove, and the lower sealing plate is provided with a lower V-shaped fitting structure for fitting with the side of the distal V-groove away from the transverse partition. The labyrinth sealing structure is formed by the cooperation of each V-groove and the corresponding V-shaped fitting structure.

[0012] As a further improvement, the front and rear V-shaped mating structures are aligned in height, and the spindle and lower sealing plate are aligned in the front and rear directions, so that the fire-resistant arc valve remains horizontal when it is in close contact with the horizontal partition and closes the upper connecting port, and remains vertical when it is in close contact with the vertical partition and closes the lower connecting port.

[0013] As a further improvement, the end of the fire-resistant arc valve near the spindle is provided with an L-shaped sealing structure that bends away from the rear sealing plate, so that when the fire-resistant arc valve is in close contact with the vertical partition and closes the communication port located below, the L-shaped sealing structure can cover the surface of the rear sealing plate to form a seal.

[0014] As a further improvement, the end of the rear sealing plate opposite to the rear V-shaped mating structure is provided with a sealing bend facing the fire-resistant arc valve, so that when the fire-resistant arc valve is tightly attached to the vertical partition and closes the communication port located below, the L-shaped sealing structure can cover the surface of the sealing bend to form a seal.

[0015] To achieve the above objectives, the technical solution of the fire-resistant arc-resistant valve provided by this utility model is as follows: An anti-arc valve is rotatably connected to one side of the communication port of a switchgear compartment. The anti-arc valve is provided with a sealing reinforcement structure that matches the sealing fit structure on at least one side of the communication port. When an arc occurs in the switchgear compartment, the anti-arc valve adaptively rotates to close the communication port and the sealing reinforcement structure and the sealing fit structure form a labyrinth-type sealing structure.

[0016] This utility model is an improved invention, and its beneficial effects are as follows: By setting a sealing reinforcement structure on the arc-resistant valve, when the arc-resistant valve closes the compartment where an arc occurs, the sealing reinforcement structure can form a labyrinth-like seal with the sealing reinforcement structure on at least one side of the connecting opening. This enhances the sealing effect of the arc-resistant valve against the arc, thereby preventing the arc from spreading outward along the gaps and avoiding damage to equipment and operators caused by the hot gas, sparks, and solid fragments carried by the arc. When an arc occurs in the compartment, some of the high-temperature and high-pressure gas generated by the arc directly impacts the surface of the arc-resistant valve, while another part of the high-temperature and high-pressure gas generated by the arc is buffered and most of the impact force is dissipated by the guidance of the labyrinth-like seal structure. This greatly reduces or even eliminates the destructive force of the gas rushing out of the compartment, significantly improving the arc-resistant capability of the compartment.

[0017] As a further improvement, the sealing reinforcement structure includes a distal sealing reinforcement structure and a proximal sealing reinforcement structure spaced apart on the fire-resistant arc valve. The proximal sealing reinforcement structure is used to match the sealing fit structure on the side of the communication port near the rotation center of the fire-resistant arc valve, and the distal sealing reinforcement structure is used to match the sealing fit structure on the other side of the communication port. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the switch cabinet according to the present invention. Figure 2 This is a partially enlarged view of the implementation of the switch cabinet of this utility model under normal working conditions; Figure 3 This is a partial enlarged view of the implementation of the switchgear of this utility model in the state of arcing in the rear cable compartment; Figure 4 This is a partially enlarged view of the implementation of the switchgear of this utility model in the state of arcing in the circuit breaker compartment.

[0019] Explanation of reference numerals in the attached figures: 1. Fan; 2. Fan mounting plate; 3. Horizontal partition; 4. Front sealing plate; 5. Circuit breaker compartment air inlet hood; 6. Rear sealing plate; 7. Rear cable compartment air inlet hood; 8. Anti-flame arc valve; 9. Vertical partition; 10. Lower sealing plate; 11. Torsion spring; 12. Mandrel; 13. Circuit breaker compartment; 14. Front cable compartment; 15. Rear cable compartment; 16. Busbar compartment; 17. Instrument compartment; 18. Circuit breaker compartment pressure relief device; 19. Busbar compartment pressure relief device; 20. Cable compartment pressure relief device; 21. Cabinet; 22. L-shaped bending structure; 23. Sealing bending section. Detailed Implementation

[0020] To address the technical problem of poor arc resistance in existing anti-arc leakage devices, the basic technical concept of this utility model is to improve the arc resistance sealing effect of the arc-resistant valve by setting a labyrinth-type sealing structure between the arc-resistant valve and the connecting openings of each compartment in the switch cabinet, thereby enhancing the arc resistance of each compartment in the switch cabinet.

[0021] The present invention will be further described in detail below with reference to the embodiments.

[0022] Specific embodiments of the switch cabinet provided by this utility model: like Figure 1 As shown, the switchgear includes a cabinet 21, within which are a circuit breaker compartment 13, a busbar compartment 16, and an instrument compartment 17. The cable compartments include a front cable compartment 14 located below the circuit breaker compartment 13 and a rear cable compartment 15 located behind the circuit breaker compartment 13. A circuit breaker compartment pressure relief device 18 is located above the circuit breaker compartment 13, a busbar compartment pressure relief device 19 is located above the busbar compartment 16, and a cable compartment pressure relief device 20 is located above the rear cable compartment 15. Furthermore, adaptively rotating fire-resistant arc-resistant valves 8 are installed at adjacent positions of the circuit breaker compartment 13 and the rear cable compartment 15.

[0023] Specifically, the circuit breaker compartment 13 and the front cable compartment 14 are separated by a horizontal partition 3, and the front cable compartment 14 and the rear cable compartment 15 are separated by a vertical partition 9. Both the horizontal partition 3 and the vertical partition 9 have connecting openings, and both openings are located close to each other. The horizontal partition 3 is connected to a circuit breaker compartment ventilation hood 5 covering its connecting openings, and the vertical partition 9 is connected to a rear cable compartment ventilation hood 7 covering its connecting openings. Inside the front cable compartment 14, a spindle 12 is installed at an adjacent position between the horizontal partition 3 and the vertical partition 9. A torsion spring 11 is sleeved on the spindle 12. One torsion arm of the torsion spring 11 is connected to the rear sealing plate 6, and the other torsion arm is connected to the anti-flame arc valve 8. The anti-flame arc valve 8 has a distal V-groove and a proximal V-groove. The front and rear sides of the connecting opening on the transverse partition 3 are respectively connected to a front sealing plate 4 and a rear sealing plate 6. The front sealing plate 4 is provided with a front V-shaped fitting structure that matches the distal V-shaped groove on the anti-arc valve 8. The distal V-shaped groove and the proximal V-shaped groove are the distances relative to the rotation center of the anti-arc valve 8. The rear sealing plate 6 is provided with a rear V-shaped fitting structure that matches the proximal V-shaped groove on the anti-arc valve 8. When a fault arc occurs in the rear cable chamber 15, the distal V-shaped groove on the anti-arc valve 8 and the front V-shaped fitting structure on the front sealing plate 4 form a labyrinth-type sealing structure, and the proximal V-shaped groove on the anti-arc valve 8 and the rear V-shaped fitting structure on the rear sealing plate 6 form a labyrinth-type sealing structure.

[0024] A fan 1 is also installed inside the front cable compartment 14. The fan 1 is connected to a fan mounting plate 2. The two ends of the fan mounting plate 2 are connected to a horizontal partition 3 and a vertical partition 9, respectively. A lower sealing plate 10 is connected to the fan mounting plate 2 near the communication port on the vertical partition 9. The lower sealing plate 10 is provided with a lower V-shaped fitting structure that matches the distal V-shaped groove on the anti-arc valve 8. When a fault arc occurs in the circuit breaker compartment 13, the distal V-shaped groove on the anti-arc valve 8 and the lower V-shaped fitting structure on the lower sealing plate 10 form a labyrinth-type sealing structure.

[0025] The torsion spring 11 supports the arc-resistant valve 8, keeping it in a normally open, downward-sloping position. The front sealing plate 4 and the rear sealing plate 6 form a sealing reinforcement on the transverse partition 3, and the lower sealing plate 10 forms a sealing reinforcement on the vertical partition 9. The V-groove forms a sealing reinforcement structure, and the V-shaped mating structure forms a sealing mating structure. When an arc occurs in the rear cable compartment 15, the arc-resistant valve 8 rotates to the horizontal closed position, sealing the circuit breaker compartment 13. When an arc occurs in the circuit breaker compartment 13, the arc-resistant valve 8 rotates to the vertical closed position, sealing the rear cable compartment 15.

[0026] Compared to the existing technology that uses flat partitions directly attached to the surface of the closing limit frame to seal the cable chamber, this method uses a matching labyrinth-type sealing structure between the anti-arc valve 8 and the horizontal partition 3, and between the anti-arc valve 8 and the vertical partition 9. In the event of an arc, this enhances the anti-arc sealing effect between the anti-arc valve 8 and the horizontal partition 3, and between the anti-arc valve 8 and the vertical partition 9, thereby preventing the arc from spreading outward along the gaps and avoiding damage to equipment and operators caused by the hot gas, sparks, and solid debris carried by the arc. When an arc occurs in the circuit breaker compartment 13 or the rear cable compartment 15, some of the high-temperature and high-pressure gas generated by the arc directly impacts the surface of the arc-resistant valve 8, while another part of the high-temperature and high-pressure gas generated by the arc is guided by the curved V-shaped sealing structure, buffered and dissipated most of the impact force, which greatly reduces or even eliminates the destructive force of the gas rushing out of the circuit breaker compartment 13 or the rear cable compartment 15, and greatly improves the arc resistance of the rear cable compartment 15 and the circuit breaker compartment 13.

[0027] like Figure 1 and Figure 2 As shown, when the switch cabinet is operating normally, the fire-resistant arc valve 8 is kept in a downward tilted state under the support of the torsion spring 11. The rear cable compartment 15 is connected to the front cable compartment 14 through the lower connecting port and the circuit breaker compartment 13 is connected to the upper connecting port.

[0028] like Figure 3As shown, when an arc occurs in the rear cable compartment 15, the arc-resistant valve 8 is impacted by the arc and then overcomes the elastic force of the torsion spring 11, rotating clockwise around the spindle 12 until the arc-resistant valve 8 is tightly pressed against the front sealing plate 4 and the rear sealing plate 6, sealing the upper connection port, thereby sealing the circuit breaker compartment 13 and releasing the arc from the cable compartment pressure relief device 20. At this time, the distal V-shaped groove on the arc-resistant valve 8 and the front V-shaped fitting structure on the front sealing plate 4 form a labyrinth-type sealing structure, and the proximal V-shaped groove on the arc-resistant valve 8 and the rear V-shaped fitting structure on the rear sealing plate 6 form a labyrinth-type sealing structure.

[0029] Furthermore, both the front V-shaped fitting structure and the rear V-shaped fitting structure extend towards the front cable chamber 14, and the extension height is consistent. This ensures that the fire-resistant arc valve 8 is parallel to the transverse partition 3 when the upper connecting port is closed. The parallelism between the fire-resistant arc valve 8 and the transverse partition 3 makes the force on both ends of the fire-resistant arc valve 8 more even, prevents the fire-resistant arc valve 8 from deforming, and improves the reliability of the sealing structure between the fire-resistant arc valve 8 and the front sealing plate 4, and between the fire-resistant arc valve 8 and the rear sealing plate 6.

[0030] like Figure 4 As shown, when an arc occurs in the circuit breaker compartment 13, the arc-resistant valve 8 is impacted by the arc and then overcomes the elastic force of the torsion spring 11, rotating counterclockwise around the spindle 12 until the arc-resistant valve 8 is tightly pressed against the lower sealing plate 10, sealing the lower connecting port, thereby sealing the rear cable compartment 15 and releasing the arc from the circuit breaker compartment pressure relief device 18. At this time, the side of the distal V-shaped groove on the arc-resistant valve 8 facing away from the transverse partition 3 forms a labyrinth-type sealing structure with the lower V-shaped mating structure on the lower sealing plate 10.

[0031] Similar to the arrangement of the fire-resistant arc valve 8 parallel to the horizontal partition 3, the lower V-shaped mating structure on the spindle 12 and the lower sealing plate 10 is aligned in the front-to-back direction, so that the fire-resistant arc valve 8 is parallel to the vertical partition 9 when closing the lower connecting port. The parallelism between the fire-resistant arc valve 8 and the vertical partition 9 can make the force on both ends of the fire-resistant arc valve 8 more even, prevent the fire-resistant arc valve 8 from deforming, and improve the reliability of the sealing structure between the fire-resistant arc valve 8 and the lower sealing plate 10.

[0032] It should be noted that when the switch cabinet resumes normal operation, the torsion spring 11 acts as a reset elastic element, and the fire-resistant arc valve 8 can return to the normally open state with its tilted downward under the elastic force of the torsion spring 11, so that the compartments can remain connected through the connecting port.

[0033] The lower sealing plate 10 is indirectly connected to the partition of the rear cable chamber 15 via the fan mounting plate 2. Compared to the lower sealing plate 10 being directly connected to the vertical partition 9, the bottom plate of the lower sealing plate 10 can fit snugly against the fan mounting plate 2, making the connection of the lower sealing plate 10 more stable, helping to prevent the lower sealing plate 10 from deforming, making the sealing fit between the anti-arc valve 8 and the lower sealing plate 10 more reliable, and improving the anti-arc capability of the rear cable chamber 15.

[0034] Based on the above embodiments, to further enhance the seal between the anti-arc valve 8 and the rear sealing plate 6, an L-shaped bending structure 22 is provided at the end of the anti-arc valve 8 near the spindle 12, bending away from the rear sealing plate 6. When an arc occurs in the circuit breaker compartment 13, the L-shaped bending structure 22 of the anti-arc valve 8, in addition to the sealing engagement between the V-shaped groove at the far end of the anti-arc valve 8 and the lower V-shaped fitting structure on the lower sealing plate 10, engages with the surface of the rear sealing plate 6 to form a double seal. This double sealing structure can further enhance the arc resistance of the rear cable compartment 15.

[0035] Based on the above embodiments, to further enhance the seal between the anti-arc valve 8 and the rear sealing plate 6, a sealing bend 23 is provided at the end of the rear sealing plate 6 away from the rear V-shaped fitting structure, bending towards the anti-arc valve 8. When an arc occurs in the circuit breaker compartment 13, the sealing bend 23 increases the sealing contact area between the L-shaped bend structure 22 and the rear sealing plate 6, based on the L-shaped bend structure 22 of the anti-arc valve 8 engaging with the surface of the rear sealing plate 6, thereby further enhancing the anti-arc capability of the rear cable compartment 15.

[0036] In other embodiments, a labyrinthine sealing structure can be formed by providing a serrated curved structure on the anti-arc valve 8, connecting one or more perpendicular blocks to the transverse partition 3 and the vertical partition 9, and ensuring that the sides of the serrated structure fit against the blocks. This labyrinthine sealing structure ensures that the high-temperature, high-pressure gas entering between the partition and the anti-arc valve 8 through the gap can only flow along the serrated curved structure, thereby weakening the destructive force of the arc.

[0037] In other embodiments, the two torsion arms of the torsion spring 11 can also be connected to the vertical partition 9 and the fire-resistant arc valve 8, respectively. In this case, the rear sealing plate 6 should be connected to the vertical partition 9 in the vertical direction, and the torsion arms of the torsion spring 11 pass through the fire-resistant arc valve 8 and are connected to the rear sealing plate 6 which is arranged in the vertical direction.

[0038] In other embodiments, the lower sealing plate 10 can also be disposed at the front. Compared to closing the rear cable compartment 15 when the anti-arc valve 8 rotates to be parallel with the vertical partition 9, when an arc occurs in the circuit breaker compartment 13, the anti-arc valve 8 can achieve the seal of the rear cable compartment 15 by rotating counterclockwise by a smaller angle. Alternatively, the front sealing plate 4 can also be disposed at the bottom. Compared to closing the circuit breaker compartment 13 when the anti-arc valve 8 rotates to be parallel with the transverse partition 3, when an arc occurs in the rear cable compartment 15, the anti-arc valve 8 can achieve the seal of the circuit breaker compartment 13 by rotating clockwise by a smaller angle.

[0039] In other embodiments, the torsion spring 11 used as the reset elastic element can be replaced by a helical spring, that is, the fire-resistant arc valve 8 is hinged at the intersection of the transverse partition 3 and the vertical partition 9, and the helical spring is used to realize the adaptive opening and closing of the fire-resistant arc valve 8. Specifically, a helical spring can be connected between the fire-resistant arc valve 8 and the transverse partition 3, or between the fire-resistant arc valve 8 and the vertical partition 9. When the switchgear is operating normally, the arc-resistant valve 8 is normally open under the support of the helical spring in its naturally extended state, so that adjacent compartments can remain connected through the connection port. When an arc occurs in the rear cable compartment 15, the arc impacts and pushes the arc-resistant valve 8 to overcome the elasticity of the helical spring, causing the arc-resistant valve 8 to engage with the horizontal partition 3, thus closing the connection port of the circuit breaker compartment 13 to meet the arc-resistant requirements of the circuit breaker compartment 13. When an arc occurs in the circuit breaker compartment 13, the arc impacts and pushes the arc-resistant valve 8 to overcome the elasticity of the helical spring, causing the arc-resistant valve 8 to engage with the vertical partition 9, thus closing the connection port of the rear cable compartment 15 to meet the arc-resistant requirements of the rear cable compartment 15. In this case, only the front sealing plate 4 located on the side of the connecting port can be installed on the transverse partition 3. At this time, one end of the fire-resistant arc valve 8 can be directly hinged to the spindle 12. The bottom of the front sealing plate 4 is aligned with the height of the transverse partition 3. The end of the fire-resistant arc valve 8 near the spindle 12 is attached to the lower surface of the transverse partition 3. The other end of the fire-resistant arc valve 8 and the front sealing plate 4 form a sealing reinforcement structure.

[0040] In other embodiments, when two adjacent compartments share a partition and are connected through a connecting port on the partition, the arc-resistant valve 8 can be adaptively rotated and connected to one side of the connecting port via a reset elastic element. A sealing reinforcement structure is provided on the arc-resistant valve 8, and sealing reinforcement elements with sealing mating structures are connected to one or both sides of the connecting port. When the compartments are operating normally, the arc-resistant valve 8 maintains a distance from the connecting port under the support of the reset elastic element; when an arc occurs in either of the adjacent compartments, the arc-resistant valve 8 is pressed tightly against the partition, sealing the connecting port, and a labyrinthine sealing structure is formed through the sealing reinforcement structure and the sealing mating structure, enhancing the isolation effect between adjacent compartments.

[0041] In other embodiments, the arc-resistant valve 8 can also be hinged between the connecting ports of two other adjacent compartments. For example, a connecting port can be provided near the corner of the horizontal partition at the bottom of the busbar compartment and the vertical partition at the rear of the circuit breaker compartment. In this case, the arc-resistant valve 8 can be hinged at the corner of the busbar compartment and the circuit breaker compartment. When a fault arc occurs in one of the compartments of the busbar compartment and the circuit breaker compartment, a labyrinth-type sealing structure is provided between the arc-resistant valve 8 and the other compartment of the busbar compartment and the circuit breaker compartment, thereby improving the arc-resistant capability of the switchgear. Alternatively, the arc-resistant valve 8 can also be hinged at the connecting port of any compartment. When an arc occurs in that compartment, the arc-resistant valve 8 is pushed by the high-temperature and high-pressure gas generated by the arc and rotates, thereby closing the connecting port of that compartment. By providing a labyrinth-type sealing structure between the arc-resistant valve 8 and the compartment, the arc-resistant capability of the switchgear can be improved.

[0042] In other embodiments, when the switchgear adopts the automatic control device for preventing arc leakage of cable compartment ventilation ducts as described in the background art (application publication number CN103490310A), a near-end sealing reinforcement structure and a far-end sealing reinforcement structure can be provided on the partition of the device, and an upper sealing fit structure and a lower sealing fit structure can be provided on the closed limiting frame. The upper sealing fit structure constitutes the far-end sealing fit structure, and the lower sealing fit structure constitutes the near-end sealing fit structure. The far-end sealing reinforcement structure and the upper sealing fit structure cooperate to form a labyrinth-type sealing structure, thereby improving the arc resistance of the cable compartment. Alternatively, only one sealing fit structure can be provided on the closed limiting frame of the device on one side of the connection opening, and a sealing reinforcement structure can be provided on the partition of the device. The sealing fit structure on the side of the connection opening and the sealing reinforcement structure together form a labyrinth-type sealing structure, thereby improving the arc resistance of the cable compartment.

[0043] Specific implementation method of the fire-resistant arc-resistant valve provided by this utility model: Specifically, the fire-resistant arc-resistant valve is the same as the fire-resistant arc-resistant valve 8 described in any embodiment of the switchgear described above, and will not be repeated here.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A switch cabinet, comprising a cabinet body, wherein the cabinet body has compartments enclosed by partitions, at least one pair of adjacent compartments having a connecting opening, a spindle being fitted at the connecting opening, the spindle being connected to a rotatable arc-resistant valve, which adaptively rotates to close the connecting opening when an arc occurs in one of the compartments, characterized in that, The fire-resistant arc valve is equipped with a sealing reinforcement structure, which is a V-shaped groove on the fire-resistant arc valve. At least one side of the communication port is connected to a sealing reinforcement member. The sealing reinforcement member is equipped with a sealing fit structure that matches the sealing reinforcement structure. When an arc occurs in the compartment, the sealing reinforcement structure on the fire-resistant arc valve and the sealing fit structure on the sealing reinforcement member form a labyrinth-type sealing structure. The sealing fit structure is a V-shaped fit structure that matches the V-shaped groove.

2. The switchgear according to claim 1, characterized in that, The sealing reinforcement includes a distal sealing reinforcement connected to the side of the communication port near the spindle and a proximal sealing reinforcement connected to the other side of the communication port. The sealing reinforcement structure includes a distal sealing reinforcement structure and a proximal sealing reinforcement structure spaced apart on the fire-resistant arc valve. The sealing mating structure includes a distal sealing mating structure on the distal sealing reinforcement that matches the distal sealing reinforcement structure, and a proximal sealing mating structure on the proximal sealing reinforcement that matches the proximal sealing reinforcement structure.

3. The switchgear according to claim 1 or 2, characterized in that, A torsion spring is sleeved on the spindle. The torsion spring is used to support the fire-resistant arc valve, so that the fire-resistant arc valve is kept in the normally open position with its tilted downward.

4. The switchgear according to claim 1, characterized in that, Each of the two adjacent compartments is provided with a connecting opening, which is located on the horizontal and vertical partitions of the two adjacent compartments. The vertical and horizontal partitions form a corner, and the spindle is assembled at the corner. There is a labyrinth-type sealing structure between the fire-resistant arc valve and the horizontal partition, which can seal the fire-resistant arc valve when it rotates to the position where it is in close contact with the horizontal partition. There is also a labyrinth-type sealing structure between the fire-resistant arc valve and the vertical partition, which can seal the fire-resistant arc valve when it rotates to the position where it is in close contact with the vertical partition.

5. The switchgear according to claim 4, characterized in that, The fire-resistant arc valve is equipped with a distal V-groove and a proximal V-groove. A front sealing plate and a rear sealing plate are connected to the transverse partition, and a lower sealing plate is connected to the vertical partition. The front sealing plate is equipped with a front V-shaped fitting structure for sealing with the distal V-groove, the rear sealing plate is equipped with a rear V-shaped fitting structure for sealing with the proximal V-groove, and the lower sealing plate is equipped with a lower V-shaped fitting structure for fitting with the side of the distal V-groove away from the transverse partition. The labyrinth sealing structure is formed by the cooperation of each V-groove and the corresponding V-shaped fitting structure.

6. The switchgear according to claim 5, characterized in that, The front and rear V-shaped mating structures are aligned at the height, and the spindle and lower sealing plate are aligned in the front and rear directions, so that the fire-resistant arc valve remains horizontal when it is in close contact with the horizontal partition and closes the upper connecting port, and remains vertical when it is in close contact with the vertical partition and closes the lower connecting port.

7. The switchgear according to claim 5, characterized in that, The fire-resistant arc valve has an L-shaped sealing structure at one end near the spindle, which bends away from the rear sealing plate. This allows the L-shaped sealing structure to cover the surface of the rear sealing plate to form a seal when the fire-resistant arc valve is tightly pressed against the vertical partition and closes the lower connecting opening.

8. The switchgear according to claim 7, characterized in that, The end of the rear sealing plate opposite to the rear V-shaped mating structure is provided with a sealing bend facing the fire-resistant arc valve, so that when the fire-resistant arc valve is tightly attached to the vertical partition and closes the communication port located below, the L-shaped sealing structure can cover the surface of the sealing bend to form a seal.

9. A fire-resistant arc-resistant valve, used for rotatably connecting to one side of the communication opening of a switchgear compartment, characterized in that, The arc-resistant valve is provided with a sealing reinforcement structure that matches the sealing fit structure on at least one side of the connection port, so that when an arc occurs in the switch cabinet compartment, the arc-resistant valve adaptively rotates to close the connection port and the sealing reinforcement structure and the sealing fit structure form a labyrinth-type sealing structure.

10. The fire-resistant arc-resistant valve according to claim 9, characterized in that, The sealing reinforcement structure includes a distal sealing reinforcement structure and a proximal sealing reinforcement structure spaced apart on the fire-resistant arc valve. The proximal sealing reinforcement structure is used to match the sealing fit structure on the side of the connection port near the rotation center of the fire-resistant arc valve, and the distal sealing reinforcement structure is used to match the sealing fit structure on the other side of the connection port.

Images