Arc extinguish chamber and switching device

Abstract

The invention discloses an arc extinguish chamber and a switching device, the arc extinguish chamber comprises a grid plate assembly, the grid plate assembly comprises a first grid plate group and a second grid plate group which are arranged at an interval along a first direction, and the middle part of the first grid plate group is discontinuously arranged and forms an arc channel communicated with the second grid plate group; the second grid plate group comprises an arc striking part arranged opposite to the arc channel in the second direction and arc extinguishing parts arranged on the two sides of the arc striking part, and the arc striking part faces the arc channel and protrudes out of the arc extinguishing parts; and the arc striking assembly extends from the two sides, in the second direction, of the arc channel to the two sides, in the second direction, of the second grid piece set, the arc striking assembly is provided with a transition connecting part which is arranged between the first grid piece set and the second grid piece set and used for isolation, and the transition connecting part, the first grid piece set and the second grid piece set are arranged at intervals in the first direction. The arc extinguishing chamber and the switching device aim at improving the overall arc extinguishing efficiency.

Description

Arc-extinguishing chamber and switching equipment Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to an arc-extinguishing chamber and a switching device. Background Technology

[0002] Switchgear typically has corresponding contact structures and arc-extinguishing chambers. The arc-extinguishing chambers can extinguish the electric arc generated by the contact structures to prevent the electric arc from damaging other parts inside the switchgear.

[0003] To improve the arc-extinguishing effect of the arc-extinguishing chamber, a double-layer arc-extinguishing grid is typically used in series to extinguish the electric arc. Different layers of arc-extinguishing grids can extinguish different parts of the arc, thereby expanding the overall arc-extinguishing area. However, the arc is difficult to stretch when it enters the second layer of arc-extinguishing grids, resulting in a generally low utilization rate of the second layer and a low overall arc-extinguishing efficiency. Furthermore, adding a second layer of arc-extinguishing grids can lead to poor venting effect of the first layer after arc extinguishing, which also affects the overall arc-extinguishing efficiency. Summary of the Invention

[0004] This application provides an arc-extinguishing chamber and a switching device, which aims to improve the overall arc-extinguishing efficiency.

[0005] This application provides an arc-extinguishing chamber, comprising a grid assembly including a first grid group and a second grid group arranged at intervals along a first direction. The first grid group is intermittently disposed in the middle to form an arc channel communicating with the second grid group. The second grid group includes an arc-initiating portion disposed opposite to the arc channel in a second direction and an arc-extinguishing portion disposed on both sides of the arc-initiating portion. The arc-initiating portion protrudes from the arc-extinguishing portion toward the arc channel. An arc-initiating assembly extends from both sides of the arc channel in the second direction to both sides of the second grid group in the second direction. The arc-initiating assembly has a transition connection portion disposed between the first grid group and the second grid group for isolation. The transition connection portion is spaced apart from both the first grid group and the second grid group in the first direction.

[0006] The arc-extinguishing chamber described above further includes an exhaust assembly, comprising a first exhaust member and a second exhaust member. The first exhaust member is located on the side of the first grid plate group facing the second grid plate group, and the first exhaust member is connected to the transition connection portion at a bending angle to form an exhaust space. The exhaust space has an exhaust port opened in the second direction away from the arc-inducing portion. The second exhaust member is located on the side of the second grid plate group away from the first grid plate group.

[0007] In the arc-extinguishing chamber described above, the height of the exhaust space increases along the first direction in the direction away from the arc-initiating part.

[0008] In the arc-extinguishing chamber described above, the arc-initiating part includes a plurality of arc-initiating grids arranged at intervals along a second direction, and the arc-extinguishing part includes a plurality of arc-extinguishing grids arranged at intervals along a second direction. The length of the arc-initiating grids in the first direction is greater than the length of the arc-extinguishing grids in the first direction.

[0009] In the arc-extinguishing chamber described above, the multiple arc-initiating grids include multiple first arc-initiating grids and multiple second arc-initiating grids distributed on both sides of the multiple first arc-initiating grids in a second direction. The length of the first arc-initiating grids in the first direction is greater than the length of the second arc-initiating grids in the first direction, and the multiple first arc-initiating grids are positioned relative to the arc channel.

[0010] The arc-extinguishing chamber described above includes an arc-extinguishing section comprising multiple arc-extinguishing grid plates arranged at intervals along a second direction, and an arc-initiating section having a sheet-like structure perpendicular to the second direction. The arc-initiating section includes a first sheet body and a second sheet body. The first sheet body is disposed between the multiple arc-extinguishing grid plates and is spaced apart from adjacent arc-extinguishing grid plates. The second sheet body protrudes from the multiple arc-extinguishing grid plates along the direction toward the arc channel.

[0011] The arc-extinguishing chamber described above includes an arc-extinguishing section comprising multiple arc-extinguishing grids spaced apart along a second direction, and an arc-initiating section comprising two arc-initiating plates spaced apart along a second direction and a connecting portion connecting the two arc-initiating plates. The two arc-initiating plates protrude from the multiple arc-extinguishing grids in a first direction, and the connecting portion has an arc-shaped structure and is connected to the ends of the two arc-initiating plates.

[0012] In the arc-extinguishing chamber described above, the extension range of the first grid group is within the extension range of the second grid group in the second direction.

[0013] In the arc-extinguishing chamber described above, the second grid plate group has both ends protruding from the first grid plate group in the second direction.

[0014] On the other hand, this application embodiment also provides a switching device, which includes the arc-extinguishing chamber mentioned above. The switching device also includes a contact system disposed on the side of the first grid group facing away from the second grid group and disposed opposite to the arc channel position; a housing for accommodating the arc-extinguishing chamber and the contact system. The housing includes a first vent on the top wall and a second vent on opposite side walls. The first vent is connected to the side of the second grid group facing away from the first grid group, and the second vent is connected to the side of the first grid group facing the second grid group.

[0015] The arc-extinguishing chamber of this application embodiment includes a grid assembly and an arc-initiating assembly. During the process of the electric arc passing through the first grid group of the grid assembly, part of it enters the grid portion of the first grid group for arc extinguishing, while the other part is transferred to the second grid group through the arc channel. During the transfer process, the electric arc first contacts the protruding arc-initiating portion, so that the arc-initiating portion can guide the electric arc to the arc-extinguishing portions on both sides respectively, which plays a transition role in the stretching of the electric arc, making it easier for the two shorter parts of the electric arc to enter the arc-extinguishing portion for arc extinguishing, thereby improving the overall arc extinguishing efficiency.

[0016] Furthermore, the arc-initiating assembly extends from both sides of the arc channel to both sides of the second grid group, providing an overall stretching and guiding effect for the arc, allowing it to fully enter the second grid group for arc extinguishing. The transition connection of the arc-initiating assembly is located between the first and second grid groups, spaced apart from both, thus providing space for the arc to enter the second grid group and for exhausting gas after passing through the first grid group. This allows gas to be directly discharged from the side of the transition connection away from the second grid group, preventing gas from entering the second grid group and affecting the arc extinguishing effect, thereby further improving the overall arc extinguishing efficiency.

[0017] Therefore, in this embodiment, corresponding improvements have been made to the utilization effect of the grid plates and the direction of arc gas exhaust during the arc extinguishing process, thereby improving the overall arc extinguishing efficiency of the arc extinguishing chamber. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of the arc-extinguishing chamber according to an embodiment of this application; Figure 2 is an isometric view of the arc-extinguishing chamber according to an embodiment of this application; Figure 3 is a schematic diagram of the overall structure of another second grid plate group of the arc-extinguishing chamber according to an embodiment of this application; Figure 4 is a schematic diagram of the structure of the first arc-inducing grid plate in another second grid plate group of the arc-extinguishing chamber according to an embodiment of this application; Figure 5 is a schematic diagram of the structure of the second arc-inducing grid plate of the arc-extinguishing chamber according to an embodiment of this application; Figure 6 is a schematic diagram of the structure of the arc-extinguishing grid plate of the arc-extinguishing chamber according to an embodiment of this application; Figure 7 is an assembly schematic diagram of the second type of arc-inducing part of the arc-extinguishing chamber according to an embodiment of this application; Figure 8 is a schematic diagram of the structure of the second type of arc-inducing part of the arc-extinguishing chamber according to an embodiment of this application; Figure 9 is an assembly schematic diagram of the third type of arc-inducing part of the arc-extinguishing chamber according to an embodiment of this application; Figure 10 is a schematic diagram of the structure of the third type of arc-inducing part of the arc-extinguishing chamber according to an embodiment of this application; Figure 11 is a schematic diagram of the structure of yet another second grid plate group of the arc-extinguishing chamber according to an embodiment of this application; Figure 12 is a schematic diagram of the external structure of the circuit breaker according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Grid assembly; 11. First grid group; 111. Arc channel; 12. Second grid group; 121. Arc ignition part; 1211. First arc ignition grid; 1211a. First grid pin; 1212. Second arc ignition grid; 1213. First body; 1214. Second body; 1215. Pin part; 1216. Arc ignition plate; 1217. Connecting part; 122. Arc extinguishing part; 1221. Arc extinguishing grid; 2. Arc ignition assembly; 21. Transition connecting part; 22. First arc ignition structure; 23. Second arc ignition structure; 24. Extension connecting part; 3. Exhaust assembly; 3a. Exhaust space; 31. First exhaust component; 32. Second exhaust component; 4. Contact system; 5. Housing; 51. First exhaust port; 52. Second exhaust port; X. First direction; Y. Second direction. Detailed Implementation

[0021] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0022] Switchgear typically has corresponding contact structures and arc-extinguishing chambers. The arc-extinguishing chambers can extinguish the electric arc generated by the contact structures to prevent the electric arc from damaging other parts inside the switchgear.

[0023] To improve the arc-extinguishing effect of the arc-extinguishing chamber, a double-layer arc-extinguishing grid is typically used in series to extinguish the electric arc. Different layers of arc-extinguishing grids can extinguish different parts of the arc, thereby expanding the overall arc-extinguishing area. However, the arc is difficult to stretch when it enters the second layer of arc-extinguishing grids, resulting in a generally low utilization rate of the second layer and a low overall arc-extinguishing efficiency. Furthermore, adding a second layer of arc-extinguishing grids can lead to poor venting effect of the first layer after arc extinguishing, which also affects the overall arc-extinguishing efficiency.

[0024] As shown in Figures 1 to 11, this application embodiment provides an arc-extinguishing chamber, which includes a grid assembly 1, comprising a first grid group 11 and a second grid group 12 arranged at intervals along a first direction X. The first grid group 11 is intermittently arranged in the middle to form an arc channel 111 that communicates with the second grid group 12. The second grid group 12 includes an arc-initiating part 121 arranged opposite to the arc channel 111 in a second direction Y and an arc-extinguishing part 122 disposed on both sides of the arc-initiating part 121. The arc-initiating part 121 protrudes out of the arc-extinguishing part 122 toward the arc channel 111. An arc-initiating assembly 2 extends from both sides of the arc channel 111 in the second direction Y to both sides of the second grid group 12 in the second direction Y. The arc-initiating assembly 2 has a transition connection part 21 disposed between the first grid group 11 and the second grid group 12 for isolation. The transition connection part 21 is spaced apart from both the first grid group 11 and the second grid group 12 in the first direction X.

[0025] In specific implementation, the arc extinguishing chamber of this application embodiment includes a grid assembly 1 and an arc ignition assembly 2. During the process of the electric arc passing through the first grid group 11 of the grid assembly 1, part of it enters the grid portion of the first grid group 11 for arc extinguishing, while the other part is transferred to the second grid group 12 by the arc channel 111. During the transfer process, the electric arc first contacts the protruding arc ignition part 121, so that the arc ignition part 121 can guide the electric arc to the arc extinguishing parts 122 on both sides respectively, which plays a transition role in the stretching of the electric arc, making it easier for the two shorter parts of the electric arc to enter the arc extinguishing part 122 for arc extinguishing, thereby improving the overall arc extinguishing efficiency.

[0026] Furthermore, the arc-initiating assembly 2 extends from both sides of the arc channel 111 to both sides of the second grid plate group 12, providing an overall stretching and guiding effect for the arc, allowing it to fully enter the second grid plate group 12 for arc extinguishing. The transition connection portion 21 of the arc-initiating assembly 2 is located between the first grid plate group 11 and the second grid plate group 12, spaced apart from both, thus providing space for the arc to enter the second grid plate group 12 and for the arc to exhaust after passing through the first grid plate group 11. This allows the gas to be directly discharged from the side of the transition connection portion 21 away from the second grid plate group 12, preventing gas from entering the second grid plate group 12 and affecting the arc extinguishing effect, thereby further improving the overall arc extinguishing efficiency.

[0027] Therefore, in this embodiment, corresponding improvements have been made to the utilization effect of the grid plates and the direction of arc gas exhaust during the arc extinguishing process, thereby improving the overall arc extinguishing efficiency of the arc extinguishing chamber.

[0028] Specifically, the arc-starting assembly 2 also includes a first arc-starting structure 22 and a second arc-starting structure 23 respectively connected to both ends of the transition connection portion 21. The first arc-starting structure 22 is disposed on both sides of the arc channel 111 to guide the arc generated by the contact system 4 to the arc channel 111 and the transition connection portion 21. The second arc-starting structure 23 is disposed on both sides of the second grid plate group 12 so that the arc can be stretched to be equal to the length of the entire second grid plate group 12, thereby ensuring the arc extinguishing effect.

[0029] As shown in Figures 1 and 2, the arc-extinguishing chamber of this embodiment further includes an exhaust assembly 3, comprising a first exhaust member 31 and a second exhaust member 32. The first exhaust member 31 is disposed on the side of the first grid plate group 11 facing the second grid plate group 12, and the first exhaust member 31 is connected to the transition connection portion 21 at a bending angle to form an exhaust space 3a. The exhaust space 3a has an exhaust port opened along the second direction Y away from the arc-inducing portion 121. The second exhaust member 32 is disposed on the side of the second grid plate group 12 away from the first grid plate group 11.

[0030] In practical implementation, as shown in Figure 2, the blue and red arrows in Figure 2 indicate the gas emission direction. The gas containing charged particles generated after the first grid group 11 and the second grid group 12 extinguish the arc can be discharged through the first exhaust component 31 and the second exhaust component 32 respectively, thus dispersing the gas into two parts and achieving a preliminary gas dispersion effect. Both the first exhaust component 31 and the second exhaust component 32 are plate-shaped structures with through holes, allowing a large amount of gas to be discharged through multiple through holes, further dividing the gas into multiple streams. This avoids excessive accumulation of charged particles that could lead to reignition, thereby ensuring the overall safety and reliability of the arc-extinguishing chamber.

[0031] Furthermore, the second exhaust member 32 is located on the side of the second grid plate group 12 facing away from the first grid plate group 11, allowing gas to be directly discharged in the first direction X from the side facing away from the first grid plate group 11. The first exhaust member 31 is located on the side of the first grid plate group 11 facing the second grid plate group 12, and the first exhaust member 31 is connected to the transition connection part 21 at a bending angle to form an exhaust space 3a. Gas can be discharged from the first exhaust member 31 to the exhaust space 3a, and then discharged from the exhaust port of the exhaust space 3a opened in the second direction Y facing away from the arc-initiating part 121. Therefore, the two parts can be discharged in the first direction X and the second direction Y respectively, and the exhaust directions are not parallel, further reducing the possibility of charged gas accumulating after discharge and causing re-arcing, thereby further ensuring the overall safety and reliability of the arc-extinguishing chamber.

[0032] Specifically, the first exhaust member 31 and the second exhaust member 32 each have multiple exhaust holes that are arranged through the first direction X, and the multiple exhaust holes are arranged in an array, which are opposite to the air gap between the multiple grids of the first grid group 11 and the second grid group 12 and have the same opening direction, so that the gas of the grid can be smoothly discharged into the exhaust holes, thereby achieving smooth discharge.

[0033] Optionally, the exhaust port of the first exhaust member 31 may extend along the direction from the first grid plate group 11 to the exhaust port of the exhaust space 3a in order to guide the gas so that the gas is closer to the exhaust port when it is discharged into the exhaust space 3a.

[0034] As shown in Figures 1 and 2, in the arc-extinguishing chamber of this embodiment, the height of the exhaust space 3a increases along the first direction X in the direction away from the arc-initiating part 121.

[0035] In specific implementation, after the gas in the first grid plate group 11 is discharged into the exhaust space 3a by the first exhaust component 31, the gas flows toward the exhaust port. In the flow direction, since the height of the exhaust space 3a increases along the first direction X, the relatively concentrated gas gradually disperses during the flow process and can be discharged in a dispersed state at the exhaust port, thereby reducing the possibility of excessive gas accumulation and re-ignition, and further improving the overall safety and reliability of the arc extinguishing chamber.

[0036] Specifically, the transition connection 21 is a straight plate-shaped structure that is inclined at an angle to the first direction X. The structure of the transition connection 21 ensures that the frictional resistance encountered by the gas during its flow in the exhaust space 3a is small, so that it can smoothly reach the exhaust port for discharge and avoid the situation where the gas accumulates inside the exhaust space 3a and cannot be discharged.

[0037] Optionally, the transition connection 21 is a stepped plate structure.

[0038] As shown in Figures 1 and 2, in the arc-extinguishing chamber of this application embodiment, the arc-initiating part 121 includes a plurality of arc-initiating grids arranged at intervals along the second direction Y, and the arc-extinguishing part 122 includes a plurality of arc-extinguishing grids 1221 arranged at intervals along the second direction Y. The length of the arc-initiating grid in the first direction X is greater than the length of the arc-extinguishing grid 1221 in the first direction X.

[0039] In specific implementation, the length of the arc-initiating grid plate of the arc-initiating part 121 is greater than the length of the arc-extinguishing grid plate 1221 of the arc-extinguishing part 122, so that it can protrude from multiple arc-extinguishing grid plates 1221 in the direction toward the arc channel 111. Therefore, when the arc moves toward the second grid plate group 12 in the first direction X, the arc-initiating grid plate can get closer to the arc, making the transition of the arc from the transition connection part 21 to the second grid plate group 12 smoother, and the arc can contact the second grid plate group 12 and be cut earlier.

[0040] Furthermore, both the arc-initiating part 121 and the arc-extinguishing part 122 are composed of grid structures, which will not affect the overall capacity of the second grid group 12. While ensuring the guiding effect on the electric arc, it can also ensure the overall arc-extinguishing effect.

[0041] As shown in Figures 1 and 2, the arc-extinguishing chamber of this embodiment includes multiple arc-initiating grids, each comprising multiple first arc-initiating grids 1211 and multiple second arc-initiating grids 1212 distributed on both sides of the first arc-initiating grids 1211 in the second direction Y. The length of the first arc-initiating grids 1211 in the first direction X is greater than the length of the second arc-initiating grids 1212 in the first direction X, and the multiple first arc-initiating grids 1211 are positioned opposite to the arc channel 111. In specific implementation, the lengths of the first arc-initiating grids 1211 and the second arc-initiating grids 1212 are set such that the second grid group 12 can form a stepped structure from the arc-extinguishing section 122, the second arc-initiating grids 1212 to the first arc-initiating grids 1211. Since the multiple first arc-initiating grid plates 1211 are positioned opposite to the arc channel 111, when the arc moves along the first direction X toward the second grid plate group 12 within the arc channel 111, it can be gradually stretched under the arc-initiating action of the first arc-initiating grid plates 1211 and the second arc-initiating grid plates 1212 in sequence, thereby further ensuring that the arc can be completely stretched to fill the entire second grid plate group 12, and further improving the arc-extinguishing effect of the second grid plate group 12.

[0042] As shown in Figures 5 and 6, in this embodiment, the length of the second arc-inducing grid 1212 is greater than the length of the arc-extinguishing grid 1221, and the length of the first arc-inducing grid 1211 is greater than the length of the second arc-inducing grid 1212. The first arc-inducing grid 1211 in this embodiment has the same shape as the first arc-inducing grid 1211 in the embodiment of Figure 4, but does not have the first grid pin 1211a in the embodiment of Figure 4.

[0043] Optionally, the multiple arc-starting grids may include multiple sets of arc-starting grids of different lengths, thereby forming a multi-level stepped structure.

[0044] As shown in Figures 3 and 4, in another embodiment of this application, each first arc-initiating grid 1211 has a correspondingly connected first grid pin 1211a. The first grid pin 1211a passes through the arc channel 111 along the first direction X, and its length is greater than the extension length of the arc channel 111. The first grid pin 1211a can be inserted into the gas-generating structure at the arc channel 111, allowing the first arc-initiating grid 1211 to be closer to the arc generated by the contact system 4, thereby enhancing the local magnetic field. It should be noted that in this embodiment, the second arc-initiating grid 1212 and the arc-extinguishing grid 1221 also have the structure shown in Figures 5 and 6.

[0045] As shown in Figures 7 and 8, in the arc-extinguishing chamber of the second embodiment of this application, the arc-extinguishing part 122 includes a plurality of arc-extinguishing grid plates 1221 arranged at intervals along the second direction Y, and the arc-initiating part 121 has a sheet-like structure perpendicular to the second direction Y. The arc-initiating part 121 includes a first sheet body 1213 and a second sheet body 1214. The first sheet body 1213 is disposed between the plurality of arc-extinguishing grid plates 1221 and is spaced apart from adjacent arc-extinguishing grid plates 1221. The second sheet body 1214 protrudes from the plurality of arc-extinguishing grid plates 1221 along the direction toward the arc channel 111.

[0046] In specific implementation, the arc-initiating part 121 has a sheet-like structure perpendicular to the second direction Y. The arc-initiating part 121 includes a first body 1213 and a second body 1214. The second body 1214 protrudes from multiple arc-extinguishing grid plates 1221 along the direction toward the arc channel 111, allowing it to be positioned close to the arc channel 111. During the movement of the arc from the arc channel 111 toward the second grid plate group 12, the second body 1214 not only guides the arc but also cuts the arc with a certain stretching length in the second direction Y, dividing the overall arc into two shorter arc segments separated in the second direction Y. This makes it easier for the arc to enter the area of ​​the arc-extinguishing grid plates 1221. Therefore, the sheet-like structure of the arc-initiating part 121 increases the utilization rate of the arc-extinguishing grid plates 1221 and makes it easier to achieve the arc-extinguishing effect.

[0047] The arc-initiating part 121 has an independently arranged sheet-like structure, arranged together with multiple arc-extinguishing grid plates 1221. The first sheet body 1213 is positioned between the multiple arc-extinguishing grid plates 1221 and spaced apart from adjacent arc-extinguishing grid plates 1221. Therefore, there is also an air gap between the first sheet body 1213 and two adjacent arc-extinguishing grid plates 1221, thus achieving a normal arc-extinguishing effect. The sheet-like arc-initiating part 121, while achieving the arc-cutting effect, also ensures that the second grid plate group 12 has sufficient arc-extinguishing capacity, further improving the arc-extinguishing effect.

[0048] Specifically, the arc-inducing portion 121 of the sheet-like structure also includes a pin portion 1215, which is connected to the end of the second body portion 1214 away from the first body portion 1213. In this embodiment, the pin portion 1215 and the first grid pin 1211a in another embodiment are both inserted into the slots of the gas-generating structure of the switching device, which not only enhances the local magnetic field but also improves the utilization rate of the internal space of the switching device.

[0049] It should be noted that the cross-sectional view in Figure 7 only shows the first body 1213 and the second body 1214 of the arc-drawing part 121, and does not show the pin part 1215 in Figure 8.

[0050] As shown in Figures 9 and 10, in the arc-extinguishing chamber of the third embodiment of this application, the arc-extinguishing part 122 includes a plurality of arc-extinguishing grid plates 1221 arranged at intervals along the second direction Y, and the arc-initiating part 121 includes two arc-initiating plates 1216 arranged at intervals along the second direction Y and a connecting part 1217 connecting the two arc-initiating plates 1216. The two arc-initiating plates 1216 protrude from the plurality of arc-extinguishing grid plates 1221 in the first direction X, and the connecting part 1217 has an arc-shaped structure and is connected to the ends of the two arc-initiating plates 1216.

[0051] In specific implementation, the two arc-initiating plates 1216 are plate-shaped structures spaced apart along the second direction Y. The connecting part 1217 is arc-shaped and connected to the ends of the two arc-initiating plates 1216, forming a U-shaped arc-initiating part 121. Since the two arc-initiating plates 1216 protrude from multiple arc-extinguishing grids 1221 in the first direction X, and the connecting part 1217 at the end protrudes towards the arc channel 111, the arc can be guided by the arc-initiating part 121 as it moves from the arc channel 111 towards the second grid group 12, thereby entering the arc-extinguishing parts 122 on both sides for arc extinguishing, ensuring the arc extinguishing effect of the second grid group 12.

[0052] Furthermore, after the electric arc enters the second grid plate group 12, a conductive circuit can be formed between the arc ignition component 2, the arc extinguishing part 122 and the arc ignition part 121. The current directions in the corresponding arc ignition component 2 and the arc ignition part 121 are opposite, and the magnetic fields generated by the reverse currents are superimposed in the same direction, which can enhance the local magnetic field, increase the Lorentz force, actively drive the electric arc into the second grid plate group 12 for arc extinguishing, and improve the arc extinguishing effect.

[0053] As shown in Figures 1 and 2, in the arc-extinguishing chamber of this embodiment, the extension range of the first grid plate group 11 is within the extension range of the second grid plate group 12 in the second direction Y. It should be noted that the extension range of the first grid plate group 11 represents the complete structure formed by the grid plate structure of the first grid plate group 11 and the arc channel 111 extending along the second direction Y.

[0054] In specific implementation, the extension range of the first grid group 11 is within the extension range of the second grid group 12. That is, the extension length of the second grid group 12 is greater than or equal to the extension length of the first grid group 11, and the second grid group 12 completely covers the extension range of the first grid group 11. This ensures that the second grid group 12 has an arc-extinguishing capacity no less than that of the first grid group 11 for arc extinguishing, thereby guaranteeing the overall arc-extinguishing effect. Furthermore, during the process of part of the arc being transferred from the arc channel 111 of the first grid group 11 to the second grid group 12, it can completely enter the second grid group 12, which covers the width of the arc channel 111, avoiding the situation where the arc cannot enter the second grid group 12 and thus affects the arc-extinguishing effect.

[0055] As shown in Figure 11, in another embodiment of the arc-extinguishing chamber of this application, the second grid plate group 12 is provided with both ends protruding from the first grid plate group 11 in the second direction Y.

[0056] In specific implementation, the second grid plate group 12 protrudes from the first grid plate group 11, and the overall extension length of the second grid plate group 12 is greater than the extension length of the first grid plate group 11, so that the second grid plate group 12 has sufficient capacity to perform sufficient arc extinguishing.

[0057] Both ends of the second grid plate group 12 protrude from the first grid plate group 11, so that the second grid plate group 12 is symmetrically arranged with the arc channel 111 as the center of symmetry, and the uniformity of arc extinguishing is achieved on both sides of the second direction Y, thereby ensuring the uniformity and stability of exhaust.

[0058] In this embodiment, the arc-starting assembly 2 further includes an extension connecting portion 24 extending along the second direction Y. The extension connecting portion 24 connects the transition connecting portion 21 and the second arc-starting structure 23, and is positioned opposite to the protruding portion of the second grid plate group 12, thereby adapting to the extension length of the second grid plate group 12. Furthermore, the extension direction of the extension connecting portion 24 avoids obstructing or interfering with the exhaust space 3a between the transition connecting portion 21 and the first exhaust member 31, ensuring that the arc gas generated by the first grid plate group 11 can be smoothly discharged along the second direction Y.

[0059] As shown in Figure 12, this application embodiment also provides a switching device, which includes the arc-extinguishing chamber mentioned above. The switching device also includes a contact system 4, which is disposed on the side of the first grid group 11 facing away from the second grid group 12 and is positioned opposite to the arc channel 111. A housing 5 is used to accommodate the arc-extinguishing chamber and the contact system 4. The housing 5 includes a first vent 51 disposed on the top wall and a second vent 52 disposed on opposite side walls. The first vent 51 is connected to the side of the second grid group 12 facing away from the first grid group 11, and the second vent 52 is connected to the side of the first grid group 11 facing the second grid group 12.

[0060] In specific implementation, the contact system 4 and the arc-extinguishing chamber are arranged at intervals along the first direction X inside the housing 5, with the contact system 4 located on the side of the first grid plate group 11 facing away from the second grid plate group 12, and positioned opposite to the arc channel 111. The arc generated by the contact system 4 can enter the grid plate portion of the first grid plate group 11 and the arc channel 111 respectively. The arc portion entering the grid plate portion is extinguished, and the generated gas can be discharged from the second vent 52 on the side wall along the second direction Y; while the arc portion entering the arc channel 111 can be transferred to the second grid plate group 12 for arc extinguishing under the arc-ignition action of the arc-ignition component 2. The gas generated after arc extinguishing can be discharged from the first vent 51 on the top wall along the first direction X. Therefore, the two parts of arc gas can be discharged along the first direction X and the second direction Y respectively, and the exhaust directions are not parallel, reducing the possibility of arc gas accumulating after discharge and causing re-ignition, thereby further ensuring the overall safety and reliability of the switchgear.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. An arc-extinguishing chamber, characterized in that, include: The grid assembly (1) includes a first grid group (11) and a second grid group (12) arranged at intervals along a first direction (X). The first grid group (11) is intermittently arranged in the middle and forms an arc channel (111) connected to the second grid group (12). The second grid group (12) includes an arc-initiating part (121) arranged in a second direction (Y) opposite to the arc channel (111) and an arc-extinguishing part (122) provided on both sides of the arc-initiating part (121). The arc-initiating part (121) faces the arc channel (111). The arc extinguishing part (122) is provided; the arc ignition assembly (2) extends from the arc channel (111) on both sides of the second direction (Y) to the second grid plate group (12) on both sides of the second direction (Y). The arc ignition assembly (2) has a transition connection part (21) disposed between the first grid plate group (11) and the second grid plate group (12) for isolation. The transition connection part (21) is spaced apart from both the first grid plate group (11) and the second grid plate group (12) in the first direction (X).

2. The arc-extinguishing chamber according to claim 1, characterized in that, The arc-extinguishing chamber further includes an exhaust assembly (3), comprising a first exhaust member (31) and a second exhaust member (32). The first exhaust member (31) is disposed on the side of the first grid plate group (11) facing the second grid plate group (12), and the first exhaust member (31) is connected to the transition connection portion (21) at a bending angle to form an exhaust space (3a). The exhaust space (3a) has an exhaust port opened along the second direction (Y) away from the arc-inducing portion (121). The second exhaust member (32) is disposed on the side of the second grid plate group (12) away from the first grid plate group (11).

3. The arc-extinguishing chamber according to claim 2, characterized in that, Along the direction away from the arc-inducing portion (121), the height of the exhaust space (3a) increases in the first direction (X).

4. The arc-extinguishing chamber according to any one of claims 1 to 3, characterized in that, The arc-inducing part (121) includes a plurality of arc-inducing grid plates arranged at intervals along the second direction (Y), and the arc-extinguishing part (122) includes a plurality of arc-extinguishing grid plates (1221) arranged at intervals along the second direction (Y). The length of the arc-inducing grid plate in the first direction (X) is greater than the length of the arc-extinguishing grid plate (1221) in the first direction (X).

5. The arc-extinguishing chamber according to claim 4, characterized in that, The plurality of arc-starting grids include a plurality of first arc-starting grids (1211) and a plurality of second arc-starting grids (1212) distributed on both sides of the plurality of first arc-starting grids (1211) in the second direction (Y). The length of the first arc-starting grids (1211) in the first direction (X) is greater than the length of the second arc-starting grids (1212) in the first direction (X), and the plurality of first arc-starting grids (1211) are positioned opposite to the arc channel (111).

6. The arc-extinguishing chamber according to any one of claims 1 to 3, characterized in that, The arc-extinguishing part (122) includes a plurality of arc-extinguishing grid plates (1221) arranged at intervals along the second direction (Y). The arc-initiating part (121) has a sheet-like structure perpendicular to the second direction (Y). The arc-initiating part (121) includes a first sheet body (1213) and a second sheet body (1214). The first sheet body (1213) is disposed between the plurality of arc-extinguishing grid plates (1221) and is spaced apart from adjacent arc-extinguishing grid plates (1221). The second sheet body (1214) protrudes from the plurality of arc-extinguishing grid plates (1221) in a direction toward the arc channel (111).

7. The arc-extinguishing chamber according to any one of claims 1 to 3, characterized in that, The arc-extinguishing part (122) includes a plurality of arc-extinguishing grid plates (1221) arranged at intervals along the second direction (Y). The arc-initiating part (121) includes two arc-initiating plates (1216) arranged at intervals along the second direction (Y) and a connecting part (1217) connecting the two arc-initiating plates (1216). The two arc-initiating plates (1216) protrude from the plurality of arc-extinguishing grid plates (1221) in the first direction (X). The connecting part (1217) has an arc-shaped structure and is connected to the ends of the two arc-initiating plates (1216).

8. The arc-extinguishing chamber according to any one of claims 1 to 3, characterized in that, In the second direction (Y), the extension range of the first grid group (11) is within the extension range of the second grid group (12).

9. The arc-extinguishing chamber according to claim 8, characterized in that, The second grid group (12) is provided with both ends protruding from the first grid group (11) in the second direction (Y).

10. A switching device, characterized in that, The switching device includes the arc-extinguishing chamber as described in any one of claims 1 to 9, and further includes: a contact system (4) disposed on the side of the first grid group (11) facing away from the second grid group (12) and positioned opposite to the arc channel (111); a housing (5) for accommodating the arc-extinguishing chamber and the contact system (4), the housing (5) including a first vent (51) disposed on the top wall and a second vent (52) disposed on opposite side walls, the first vent (51) being connected to the side of the second grid group (12) facing away from the first grid group (11), and the second vent (52) being connected to the side of the first grid group (11) facing the second grid group (12).

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