Arc extinguish chamber and switching device
By setting guide slopes and transition surfaces in the arc extinguishing chamber slot to form a bell-mouth structure, the problem of the arc directly acting on the grid assembly is solved, the arc is buffered and cooled, and the arc extinguishing ability and safety of the arc extinguishing chamber are improved.
Patent Information
- Application Number
- CN202422972533.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-03
AI Technical Summary
In existing switchgear, the electric arc directly acts on the grid assembly, causing wear and thermal damage, which affects the arc extinguishing effect and service life of the arc extinguishing chamber.
A guide slope and a transition surface are provided in the slot of the arc extinguishing chamber. The guide slope guides the arc to the through hole, and the transition surface buffers the arc heat, forming a bell-mouth structure to slow down the arc energy and reduce the risk of arc damage to the grid assembly.
Effectively reduce the risk of arc damage to grid components, improve the arc extinguishing effect and use safety of the arc extinguishing chamber, and extend the service life of the arc extinguishing chamber.
Smart Images
Figure CN223462130U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of switch device, in particular to an arc-extinguishing chamber and a switch device. BACKGROUND
[0002] When the switch device cuts off the current circuit, the arc appears in the contact assembly in the switch device. Since the arc can cause damage to the contact assembly and the components around the contact assembly, the arc-extinguishing chamber is usually provided in the switch device to accelerate the arc extinction, so as to reduce the harm of the arc to the switch device.
[0003] The arc-extinguishing chamber includes an arc-extinguishing cover and a grid assembly. The grid assembly is arranged on the arc-extinguishing cover. The arc-extinguishing cover can limit the arc and reduce the possibility of the arc diffusing out of the arc-extinguishing chamber while not affecting the arc entering the grid assembly.
[0004] However, in the arc-extinguishing process of the existing switch device, the arc directly moves from the contact assembly to the grid assembly. The arc directly acting on the grid assembly can easily cause wear and thermal damage of the grid assembly, thereby affecting the arc-extinguishing effect and service life of the arc-extinguishing chamber. CONTENT OF THE INVENTION
[0005] The purpose of the present application is to provide an arc-extinguishing chamber and a switch device, which can reduce the influence of the arc on the grid assembly and improve the arc-extinguishing capacity of the arc-extinguishing chamber.
[0006] In a first aspect, an arc-extinguishing chamber is provided. The arc-extinguishing chamber includes an arc-extinguishing cover and a grid assembly. The arc-extinguishing cover is provided with a through slot. The through slot includes a first side wall, a second side wall and a third side wall. The first side wall and the second side wall are oppositely arranged on both sides of the third side wall. The grid assembly is arranged on the arc-extinguishing cover and located on the side of the arc-extinguishing cover away from the through slot. The third side wall is provided with a through hole. The through hole is connected with the through slot and the grid assembly. The first side wall is provided with a first guide inclined surface. The second side wall is provided with a second guide inclined surface. The first guide inclined surface and the second guide inclined surface are used for guiding the arc to the through hole.
[0007] According to the above-mentioned embodiments of the present application, by arranging the first guide inclined surface and the second guide inclined surface on the through slot, the arc can move along the first guide inclined surface and the second guide inclined surface in the through slot to the through hole after moving from the contact assembly to the through slot. In this way, on the one hand, the arc can be prevented from directly acting on the grid assembly. On the other hand, the heat of the arc can be dispersed, the temperature of the arc entering the through hole and then entering the grid assembly through the through hole can be reduced, and thus the risk of damage to the grid assembly caused by the arc can be effectively reduced.
[0008] In some examples, the first guide slope and the second guide slope are oppositely arranged, and a distance between a side of the first guide slope close to the through hole and a side of the second guide slope close to the through hole is smaller than a distance between a side of the first guide slope away from the through hole and a side of the second guide slope away from the through hole.
[0009] Based on the above-mentioned embodiments of the present application, the oppositely arranged first guide slope and the second guide slope can cooperate with each other to guide and buffer the arc entering the through slot. Through the above-mentioned limitation on the positional relationship between the first guide slope and the second guide slope, the first guide slope and the second guide slope can form a structure similar to a horn mouth in cooperation with the through hole, which can on the one hand play a more effective buffering role on the arc and reduce the energy of the arc entering the through hole, thereby reducing the risk of damage to the grid assembly caused by the arc. On the other hand, it can keep the arc moving towards the through hole and reduce the risk of the arc moving reversely from the through slot to the contact assembly, which is conducive to improving the arc extinguishing effect of the arc extinguishing chamber.
[0010] In some examples, the first side wall is further provided with a third guide slope, and the third guide slope is arranged on a side of the first guide slope away from the through hole. The second side wall is further provided with a fourth guide slope, and the fourth guide slope is arranged on a side of the second guide slope away from the through hole.
[0011] Based on the above-mentioned embodiments of the present application, by arranging the third guide slope on the first side wall, the third guide slope and the first guide slope can be used to play different buffering roles on the arc at different positions of the first side wall. Similarly, by arranging the fourth guide slope on the second side wall, the fourth guide slope and the second guide slope can be used to play different buffering roles on the arc at different positions of the second side wall, which further improves the buffering effect of the arc in the through slot and reduces the risk of damage to the grid assembly caused by the arc.
[0012] In some examples, a distance between a side of the third guide slope close to the first guide slope and a side of the fourth guide slope close to the second guide slope is smaller than a distance between a side of the third guide slope away from the first guide slope and a side of the fourth guide slope away from the second guide slope.
[0013] Based on the above-mentioned embodiments of the present application, through the limitation on the positional relationship between the third guide slope and the fourth guide slope, the third guide slope and the fourth guide slope can also form a structure similar to a horn mouth in the through slot, and the structure similar to a horn mouth formed between the third guide slope and the fourth guide slope and the structure similar to a horn mouth formed between the first guide slope and the fourth guide slope are connected in series. This can further improve the buffering effect of the third guide slope and the fourth guide slope on the arc.
[0014] In some examples, the width of the first guide slope from the side close to the through hole to the side away from the through hole is less than the width of the third guide slope from the side close to the first guide slope to the side away from the first guide slope, and the included angle between the first guide slope and the third guide slope is obtuse.
[0015] Based on the above-mentioned embodiments of the present application, by limiting the width and the included angle range of the first guide slope and the third guide slope, the first guide slope and the third guide slope can have different buffering effects on the electric arc while maintaining a smooth transition, so that the electric arc and the gas flow move smoothly along the third guide slope and the first guide slope, thereby taking away the generated heat and ionized gas, which is conducive to reducing the temperature and improving the arc extinguishing efficiency.
[0016] In some examples, the width of the second guide slope from the side close to the through hole to the side away from the through hole is less than the width of the fourth guide slope from the side close to the second guide slope to the side away from the second guide slope, and the included angle between the second guide slope and the fourth guide slope is obtuse.
[0017] Based on the above-mentioned embodiments of the present application, by limiting the width and the included angle range of the second guide slope and the fourth guide slope, the second guide slope and the fourth guide slope can have different buffering effects on the electric arc while maintaining a smooth transition, so that the electric arc and the gas flow move smoothly along the fourth guide slope and the second guide slope, thereby taking away the generated heat and ionized gas, which is conducive to reducing the temperature and improving the arc extinguishing efficiency.
[0018] In some examples, the third side wall is provided with a first transition surface and a second transition surface, the first transition surface is arranged between the first guide slope and the through hole, and the second transition surface is arranged between the second guide slope and the through hole.
[0019] Based on the above-mentioned embodiments of the present application, the arrangement of the first transition surface and the second transition surface can cooperate with the structure on the first side wall and the second side wall to buffer the electric arc, while also reducing the risk of a large amount of electric arc passing through the through hole into the grid assembly at once, which is conducive to improving the use safety and arc extinguishing efficiency of the arc extinguishing chamber.
[0020] In some examples, the arc extinguishing cover is provided with a first mounting hole and a second mounting hole on the side away from the side where the through groove is arranged. The grid assembly includes at least two arc extinguishing grids, and the arc extinguishing grids are provided with a first mounting leg and a second mounting leg, the length of the first mounting leg is less than the length of the second mounting leg, the first mounting leg is correspondingly mounted in the first mounting hole, and the second mounting leg is correspondingly mounted in the second mounting hole.
[0021] Based on the above-mentioned embodiments of the present application, by arranging the first mounting leg and the second mounting leg with different lengths on the arc extinguishing grid piece, the possibility of installation position and installation direction errors can be reduced when assembling the grid piece assembly and the arc extinguishing cover, so that the grid piece assembly can provide accurate and stable arc extinguishing effect, which is beneficial to improve the arc extinguishing effect of the arc extinguishing chamber.
[0022] In some examples, the first side wall is provided with a first arc running track, the first arc running track being in communication with the through hole, and / or the second side wall is provided with a second arc running track, the second arc running track being in communication with the through hole.
[0023] Based on the above-mentioned embodiments of the present application, by arranging the first arc running track and the second arc running track, the electric arc can be accurately moved to the through hole along the first side wall and the second side wall, and at the same time, the first arc running track and the second arc running track can play a certain buffering effect on the electric arc, so as to reduce the risk of damage to the grid piece assembly caused by the electric arc.
[0024] In a second aspect, the embodiments of the present application also provide a switch device, which comprises a contact assembly and the above-mentioned arc extinguishing chamber, and the contact assembly corresponds to the through slot.
[0025] By arranging the through slot on the arc extinguishing chamber, the through slot corresponds to the contact assembly, so that the electric arc generated by the contact assembly can first enter the through slot, the through slot plays a buffering and cooling effect on the electric arc, and then the electric arc moves to the grid piece assembly in the arc extinguishing chamber, which can reduce the damage to the grid piece assembly caused by the direct action of the electric arc on the grid piece assembly, and is beneficial to the grid piece assembly to maintain stable arc extinguishing capability. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.
[0027] Figure 1 The structure schematic diagram of the arc extinguishing chamber provided by the embodiments of the present application is matched with the contact assembly.
[0028] Figure 2 The first view of the arc extinguishing chamber provided by the embodiments of the present application.
[0029] Figure 3 The second view of the arc extinguishing chamber provided by the embodiments of the present application.
[0030] Figure 4 The first view of the arc extinguishing cover provided by the embodiments of the present application.
[0031] Figure 5A second view of the arc extinguishing cover provided by the embodiment of the present application.
[0032] Figure 6 An exploded view of the arc extinguishing chamber provided by the embodiment of the present application.
[0033] Figure 7 A third view of the arc extinguishing cover provided by the embodiment of the present application.
[0034] BRIEF DESCRIPTION OF DRAWINGS
[0035] 100, arc extinguishing chamber; 200, contact assembly; 1, arc extinguishing cover; 11, first side wall; 12, second side wall; 13, third side wall; 111, first guide slope; 112, third guide slope; 113, first mounting hole; 114, first limiting groove; 115, first boss; 121, second guide slope; 122, fourth guide slope; 123, second mounting hole; 124, second limiting groove; 125, second boss; 131, through hole; 132, first transition surface; 133, second transition surface; 14, through groove; 2, grid assembly; 21, arc extinguishing grid; 211, arc contact; 212, first mounting leg; 213, second mounting leg. DETAILED DESCRIPTION
[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.
[0038] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0039] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "in", "out" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0041] When the switch device cuts off the current-carrying circuit, an arc will appear at the contact assembly in the switch device. In order to reduce the damage of the arc to the switch device, an arc extinguishing chamber is usually provided in the switch device. The arc extinguishing chamber includes an arc shield and a grid assembly connected together. The arc moving to the grid assembly can accelerate the extinction of the arc to reduce the risk of arc spreading.
[0042] However, in the arc extinguishing process of the existing switch device, the arc generated at the contact assembly will directly move to the grid assembly. The voltage and high temperature carried by the arc directly act on the grid assembly, which can easily cause wear and thermal damage of the grid assembly, affecting the arc extinguishing effect and service life of the arc extinguishing chamber.
[0043] Based on this, the embodiments of the present application provide an arc extinguishing chamber and a switch device, which can reduce the influence of the arc on the grid assembly and improve the arc extinguishing capacity of the arc extinguishing chamber.
[0044] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.
[0045] Figure 1 The structure of the arc extinguishing chamber provided in the embodiments of the present application is matched with the contact assembly. The embodiments also provide a switch device, which includes a contact assembly 200 and an arc extinguishing chamber 100 as shown in Figure 1 The contact assembly 200 corresponds to the through slot 14 of the arc extinguishing chamber 100.
[0046] By setting the through slot 14 on the arc extinguishing chamber 100, the through slot 14 corresponds to the contact assembly 200, so that the arc generated by the contact assembly 200 first enters the through slot 14, and the through slot 14 plays a role of buffering and cooling the arc, and then moves to the grid assembly 2 of the arc extinguishing chamber 100, that is, the damage of the arc directly acting on the grid assembly 2 to the grid assembly 2 can be reduced, and the grid assembly 2 can maintain stable arc extinguishing capacity.
[0047] The switch device can be a circuit breaker, a contactor, or a disconnector. The contact assembly 200 in the switch device corresponds to the slot of the through slot 14, so that the arc generated on the contact assembly 200 quickly and accurately enters the through slot 14 of the arc extinguishing chamber 100, reducing the risk of the arc spreading to other positions.
[0048] Please refer to Figures 1 to 3 The embodiment provides an arc extinguishing chamber 100, which comprises an arc extinguishing cover 1 and a grid assembly 2. The arc extinguishing cover 1 is provided with a through slot 14, and the through slot 14 comprises a first side wall 11, a second side wall 12 and a third side wall 13. The first side wall 11 and the second side wall 12 are oppositely arranged on the two sides of the third side wall 13. The grid assembly 2 is arranged on the arc extinguishing cover 1 and located on the side of the arc extinguishing cover 1 away from the side where the through slot 14 is arranged. The third side wall 13 is provided with a through hole 131, and the through hole 131 communicates the through slot 14 and the grid assembly 2. The first side wall 11 is provided with a first guide inclined surface 111, and the second side wall 12 is provided with a second guide inclined surface 121. The first guide inclined surface 111 and the second guide inclined surface 121 are used for guiding the arc to the through hole 131.
[0049] Based on the above-mentioned embodiments of the present application, by arranging the first guide inclined surface 111 and the second guide inclined surface 121 on the through slot 14, after the arc moves from the contact assembly 200 to the through slot 14, the arc can move to the through hole 131 in the through slot 14 along the first guide inclined surface 111 and the second guide inclined surface 121. This can prevent the arc from directly acting on the grid assembly 2, and can also help to disperse the heat of the arc, reduce the temperature of the arc entering the through hole 131 and then entering the grid assembly 2 through the through hole 131, thereby effectively reducing the risk of damage to the grid assembly 2 caused by the arc.
[0050] Refer to Figures 1 to 3 The through slot 14 is arranged on one side of the arc extinguishing cover 1, and the first side wall 11, the second side wall 12 and the third side wall 13 can form a U-shaped slot. The contact assembly 200 can correspond to the top opening of the U-shaped slot, so that the arc extinguishing cover 1 can easily receive the arc.
[0051] The grid assembly 2 is arranged on the side of the arc extinguishing cover 1 away from the through slot 14 and communicates with the through slot 14 through the through hole 131 formed on the third side wall 13, so that the arc received by the through slot 14 can move to the grid assembly 2 through the through hole 131, thereby achieving the purpose of extinguishing the arc.
[0052] Specifically, the first guide inclined surface 111 is arranged to be inclined based on the plane where the first side wall 11 is located, and the second guide inclined surface 121 is arranged to be inclined based on the plane where the second side wall 12 is located. The arrangement of the inclined surfaces can enable the arc to contact the first guide inclined surface 111 and the second guide inclined surface 121 in the through slot 14 and move along the first guide inclined surface 111 and the second guide inclined surface 121, so that the heat of the arc can be dispersed during the movement, thereby reducing the risk of thermal damage to the grid assembly 2 caused by the arc.
[0053] Moreover, the arrangement of the first guide inclined surface 111 and the second guide inclined surface 121 can slow down the moving speed of the arc, thereby reducing the impact on the grid assembly 2 caused by the arc directly rushing into the grid assembly 2 from the contact assembly 200. Meanwhile, after the arc moves to the through hole 131 along the first guide inclined surface 111 and the second guide inclined surface 121, the arrangement of the inclined surfaces can reduce the possibility of the arc moving reversely to the contact assembly 200, thereby reducing the risk of re-formation of the arc, which is conducive to improving the use safety of the arc extinguishing chamber 100.
[0054] Referring to Figure 2 In some examples, the grid assembly 2 includes at least two arc extinguishing grids 21, and the at least two arc extinguishing grids 21 are arranged to be stacked and spaced from each other. The arc extinguishing grid 21 is provided with an arc receiving opening 211, and the arc receiving opening 211 faces the through hole 131 to receive the arc passing through the through hole 131.
[0055] The arc receiving opening 211 is arranged on the side wall of the arc extinguishing grid 21 close to the through hole 131, and the arc receiving opening 211 is offset from the central position of the side wall, so that the arc receiving opening 211 is not directed to the central position of the through hole 131 after the grid assembly 2 is assembled to the arc extinguishing cover 1. Moreover, the adjacent two arc extinguishing grids 21 are reversely stacked, so that the arc receiving openings 211 of the adjacent two arc extinguishing grids 21 are arranged to be staggered, and both of the arc receiving openings 211 face the through hole 131, so that the arc can be elongated in two directions when the arc enters the space between the adjacent two arc extinguishing grids 21, thereby facilitating the extinguishing of the arc.
[0056] Referring to Figures 1 to 4 In some examples, the first guide inclined surface 111 and the second guide inclined surface 121 are arranged to be opposite to each other, and the distance between the side of the first guide inclined surface 111 close to the through hole 131 and the side of the second guide inclined surface 121 close to the through hole 131 is smaller than the distance between the side of the first guide inclined surface 111 away from the through hole 131 and the side of the second guide inclined surface 121 away from the through hole 131.
[0057] Based on the above embodiments of the present application, the oppositely arranged first guide slope 111 and second guide slope 121 can cooperate with each other to guide and buffer the arc entering the through slot 14. By limiting the positional relationship of the first guide slope 111 and the second guide slope 121 as described above, the first guide slope 111 and the second guide slope 121 can cooperate with the through hole 131 to form a structure similar to a horn mouth. In this way, on the one hand, the arc can be more effectively buffered, reducing the energy of the arc entering the through hole 131, thereby reducing the risk of damage to the grid assembly 2 caused by the arc. On the other hand, it can keep the arc moving towards the through hole 131, reducing the risk of the arc moving reversely from the through slot 14 to the contact assembly 200, and is beneficial to improve the arc extinguishing effect of the arc extinguishing chamber 100.
[0058] Specifically, the side of the first guide slope 111 close to the through hole 131 is the end of the first guide slope 111, and the side of the first guide slope 111 away from the through hole 131 is the starting end of the first guide slope 111. The side of the second guide slope 121 close to the through hole 131 is the end of the second guide slope 121, and the side of the second guide slope 121 away from the through hole 131 is the starting end of the second guide slope 121.
[0059] Referring to Figure 4 The distance a between the end of the first guide slope 111 and the end of the second guide slope 121 is less than the distance b between the starting end of the first guide slope 111 and the starting end of the second guide slope 121.
[0060] With this arrangement, a structure similar to a horn mouth can be formed between the first guide slope 111, the second guide slope 121 and the through hole 131, and the larger side of the horn mouth structure opens towards the slot of the U-shaped through slot 14. In this way, the first guide slope 111 and the second guide slope 121 can cooperate with the through slot 14 to receive the arc, which is beneficial to the arc entering the through slot 14 and moving to the through hole 131.
[0061] Referring to Figure 2 and Figure 3 In some examples, the first side wall 11 is further provided with a third guide slope 112, and the third guide slope 112 is arranged on the side of the first guide slope 111 away from the through hole 131. The second side wall 12 is further provided with a fourth guide slope 122, and the fourth guide slope 122 is arranged on the side of the second guide slope 121 away from the through hole 131.
[0062] Based on the above embodiments of the present application, by arranging the third guide slope 112 on the first side wall 11, the different structures of the third guide slope 112 and the first guide slope 111 can be utilized to play different buffering effects on the electric arc at different positions of the first side wall 11. Similarly, by arranging the fourth guide slope 122 on the second side wall 12, the different structures of the fourth guide slope 122 and the second guide slope 121 can be utilized to play different buffering effects on the electric arc at different positions of the second side wall 12, further improving the buffering effect of the electric arc in the through slot 14 and reducing the risk of damage to the grid plate assembly 2 caused by the electric arc.
[0063] The third guide slope 112 is arranged on the side of the first guide slope 111 away from the through hole 131, and the third guide slope 112 can be directly or indirectly connected with the first guide slope 111 as a whole. In the present embodiment, the third guide slope 112 is directly connected to the starting end of the first guide slope 111, and the electric arc entering the through slot 14 can first move along the third guide slope 112 and then move from the third guide slope 112 to the first guide slope 111.
[0064] Meanwhile, the fourth guide slope 122 is arranged on the side of the second guide slope 121 away from the through hole 131, and in the present embodiment, the fourth guide slope 122 is directly connected to the starting end of the second guide slope 121, and the electric arc entering the through slot 14 can first move along the fourth guide slope 122 and then move from the fourth guide slope 122 to the second guide slope 121.
[0065] The first guide slope 111 and the second guide slope 121 are oppositely arranged and cooperated with each other, and the third guide slope 112 and the fourth guide slope 122 are oppositely arranged and cooperated with each other. This arrangement can utilize the different structures of the slopes to play different buffering effects on the electric arc, and is also beneficial to the gas flow through the arc extinguishing cover 1 to reduce the heat of the electric arc and further reduce the risk of damage to the grid plate assembly 2 caused by the electric arc.
[0066] Referring to Figure 5 In some examples, the distance between the side of the third guide slope 112 close to the first guide slope 111 and the side of the fourth guide slope 122 close to the second guide slope 121 is less than the distance between the side of the third guide slope 112 away from the first guide slope 111 and the side of the fourth guide slope 122 away from the second guide slope 121.
[0067] Based on the above-mentioned embodiments of the present application, by limiting the positional relationship of the third guide slope 112 and the fourth guide slope 122, the third guide slope 112 and the fourth guide slope 122 can also form a similar horn structure in the through slot 14, and are in communication with the similar horn structure formed between the first guide slope 111 and the fourth guide slope 122, so that the buffering effect of the third guide slope 112 and the fourth guide slope 122 on the electric arc can be further improved.
[0068] Specifically, the side of the third guide slope 112 close to the first guide slope 111 is the end of the third guide slope 112, and the side of the third guide slope 112 away from the first guide slope 111 is the starting end of the third guide slope 112.
[0069] The side of the fourth guide slope 122 close to the second guide slope 121 is the end of the fourth guide slope 122, and the side of the fourth guide slope 122 away from the second guide slope 121 is the starting end of the fourth guide slope 122. By setting the same positional relationship as the first guide slope 111 and the second guide slope 121, the same technical effect can be achieved.
[0070] With reference to Figure 5 The distance c between the end of the third guide slope 112 and the end of the fourth guide slope 122 is less than the distance d between the starting end of the third guide slope 112 and the starting end of the fourth guide slope 122.
[0071] By adopting this setting form, the size of the opening can be further increased on the basis of the horn structure formed between the first guide slope 111, the second guide slope 121 and the through hole 131, which is conducive to further improving the buffering effect on the electric arc under the premise of facilitating the accommodation of the electric arc.
[0072] With reference to Figure 5 In some examples, the width of the first guide slope 111 from the side close to the through hole 131 to the side away from the through hole 131 is less than the width of the third guide slope 112 from the side close to the first guide slope 111 to the side away from the first guide slope 111, and the included angle between the first guide slope 111 and the third guide slope 112 is obtuse.
[0073] Based on the above-mentioned embodiments of the present application, by limiting the width and the included angle range of the first guide slope 111 and the third guide slope 112, the first guide slope 111 and the third guide slope 112 can have different buffering effects on the electric arc while maintaining a relatively smooth transition, so that the electric arc and the airflow can smoothly move along the third guide slope 112 and the first guide slope 111, thereby taking away the generated heat and ionized gas, which is conducive to reducing the temperature and improving the arc extinguishing efficiency.
[0074] The first guide slope 111 is located on the side of the third guide slope 112 close to the through hole 131, the width of the first guide slope 111 is smaller than the width of the third guide slope 112, and an obtuse angle is formed between the first guide slope 111 and the third guide slope 112. By setting slopes with different angles and lengths, different buffering effects can be achieved on the electric arc to improve the arc extinguishing efficiency. At the same time, the uniformity of the electric field when the electric arc passes through can be improved, and the electric field concentration phenomenon can be reduced, so as to improve the insulation capacity of the arc extinguishing cover 1 as a whole, thereby preventing the electric arc from reigniting and improving the arc extinguishing effect of the arc extinguishing chamber 100.
[0075] The angle between the first guide slope 111 and the third guide slope 112 is an obtuse angle. In the embodiment, the angle between the first guide slope 111 and the third guide slope 112 is set to 135°, and of course, other angles within the range of an obtuse angle can also be set, such as 140° or 160°, etc. The setting in the embodiment makes the smooth transition of the third guide slope 112 and the first guide slope 111, which is beneficial to the smooth movement of the electric arc from the third guide slope 112 to the first guide slope 111.
[0076] Reference Figure 5 In some examples, the width of the second guide slope 121 from the side close to the through hole 131 to the side away from the through hole 131 is smaller than the width of the fourth guide slope 122 from the side close to the second guide slope 121 to the side away from the second guide slope 121, and an obtuse angle is formed between the second guide slope 121 and the fourth guide slope 122.
[0077] Based on the above-mentioned embodiments of the present application, by limiting the width and the angle range of the second guide slope 121 and the fourth guide slope 122, the second guide slope 121 and the fourth guide slope 122 can have different buffering effects on the electric arc while maintaining a relatively smooth transition, so that the electric arc and the airflow can move smoothly along the fourth guide slope 122 and the second guide slope 121, thereby taking away the generated heat and ionized gas, which is beneficial to reducing the temperature and improving the arc extinguishing efficiency.
[0078] The second guide slope 121 is located on the side of the fourth guide slope 122 close to the through hole 131, the width of the second guide slope 121 is smaller than the width of the fourth guide slope 122, and an obtuse angle is formed between the second guide slope 121 and the fourth guide slope 122. The second guide slope 121 and the fourth guide slope 122 have the same setting form as the first guide slope 111 and the third guide slope 112, and can have the same technical effects, which will not be described here.
[0079] In the embodiment, the included angle between the second guide slope 121 and the fourth guide slope 122 is also set to 135°, so as to realize smooth transition of the second guide slope 121 and the fourth guide slope 122, and facilitate smooth movement of the electric arc from the fourth guide slope 122 to the second guide slope 121.
[0080] The first side wall 11 and the second side wall 12 are set to the same form, and can cooperate with each other to stably and efficiently buffer the electric arc in the through slot 14. The first guide slope 111 and the second guide slope 121 can also cooperate with each other to increase the airflow speed and promote disturbance of the airflow, and further enhance the cooling effect on the electric arc. Such a structure can also effectively disrupt the gas layer near the electric arc, let fresh air in, and enhance the heat dissipation effect.
[0081] The third guide slope 112 and the fourth guide slope 122 cooperate with each other to help guide the electric arc and the airflow to move along the slopes, thereby taking away the generated heat and ionized gas generated by the high temperature of the electric arc, and facilitating temperature reduction.
[0082] Referring to Figure 2 and Figure 3 In some examples, the third side wall 13 is provided with a first transition surface 132 and a second transition surface 133. The first transition surface 132 is arranged between the first guide slope 111 and the through hole 131, and the second transition surface 133 is arranged between the second guide slope 121 and the through hole 131.
[0083] Based on the above-mentioned embodiments of the present application, the arrangement of the first transition surface 132 and the second transition surface 133 can cooperate with the structure on the first side wall 11 and the second side wall 12 to buffer the electric arc, and also reduce the risk of a large amount of electric arc entering the grid assembly 2 through the through hole 131 at a moment, and facilitate improvement of the use safety and arc extinguishing efficiency of the arc extinguishing chamber 100.
[0084] The first transition surface 132 is arranged between the first guide slope 111 and the through hole 131, so as to realize smooth transition between the first guide slope 111 and the through hole 131, change the moving direction of the electric arc, and enable the electric arc to smoothly move from the first guide slope 111 to the through hole 131. The first transition surface 132 can also further buffer the electric arc, so as to reduce the energy of the electric arc passing through the through hole 131.
[0085] Similarly, the second transition surface 133 is arranged between the second guide slope 121 and the through hole 131, and can make the first guide slope 111 and the through hole 131 smoothly transition, change the moving direction of the electric arc together with the first transition surface 132, and make the electric arc smoothly move from the second guide slope 121 to the through hole 131. The second transition surface 133 can also further buffer the electric arc, so as to reduce the energy of the electric arc passing through the through hole 131, and further reduce the risk of damage to the grid assembly 2 caused by the electric arc.
[0086] In an optional embodiment, the first transition surface 132 and the second transition surface 133 can be configured as a plane or an arc surface. The first transition surface 132 and the second transition surface 133 are arranged as a plane or an arc surface, and can accurately cooperate with the through hole 131, the first guide slope 111 and the second guide slope 121, and play a stable buffering role.
[0087] The first transition surface 132 and the second transition surface 133 can be arranged according to different buffering effects and according to the specific structures of the through hole 131, the first guide slope 111 and the second guide slope 121. For example, when the first guide slope 111 and the second guide slope 121 are replaced by the first guide arc surface and the second guide arc surface, the first transition surface 132 and the second transition surface 133 arranged as an arc surface can better cooperate with the first guide arc surface and the second guide arc surface.
[0088] Reference Figure 6 and Figure 7 In some examples, the arc-extinguishing shield 1 is provided with a first mounting hole 113 and a second mounting hole 123 on the side away from the through groove 14. The grid assembly 2 includes at least two arc-extinguishing grids 21, and the arc-extinguishing grid 21 is provided with a first mounting leg 212 and a second mounting leg 213. The length of the first mounting leg 212 is less than the length of the second mounting leg 213, the first mounting leg 212 is correspondingly mounted to the first mounting hole 113, and the second mounting leg 213 is correspondingly mounted to the second mounting hole 123.
[0089] Based on the above-mentioned embodiments of the present application, by arranging the first mounting leg 212 and the second mounting leg 213 with different lengths on the arc-extinguishing grid 21, the possibility of installation position and installation direction error can be reduced when assembling the grid assembly 2 and the arc-extinguishing shield 1, so that the grid assembly 2 can provide accurate and stable arc-extinguishing effect, and the arc-extinguishing effect of the arc-extinguishing chamber 100 is improved.
[0090] Specifically, reference Figure 6 and Figure 7The first mounting hole 113 and the second mounting hole 123 are arranged on the side of the arc extinguishing cover 1 away from the side where the through slot 14 is arranged, and are both blind holes. The first mounting hole 113 is arranged on the first side wall 11, and a plurality of first limiting grooves 114 are further arranged on the first side wall 11, and the plurality of first limiting grooves 114 extend from the opening of the first mounting hole 113 to the bottom of the first mounting hole 113. The second mounting hole 123 is arranged on the second side wall 12, and a plurality of second limiting grooves 124 are arranged on the second side wall 12, and the plurality of second limiting grooves 124 on the second side wall 12 extend from the opening of the second mounting hole 123 to the bottom of the second mounting hole 123.
[0091] The grid assembly 2 is mounted between the first side wall 11 and the second side wall 12, and the grid assembly 2 comprises at least two arc extinguishing grids 21. The two side edges of each arc extinguishing grid 21 correspondingly plug into the first limiting groove 114 and the second limiting groove 124, so that the arc extinguishing grid 21 is limited and mounted by the first limiting groove 114 and the second limiting groove 124, and each arc extinguishing grid 21 in the grid assembly 2 is kept apart to ensure that the electric arc can enter between two adjacent arc extinguishing grids 21.
[0092] During assembly, the first mounting leg 212 of the arc extinguishing grid 21 can be inserted into the first mounting hole 113 along the first limiting groove 114, and the second mounting leg 213 can be inserted into the second mounting hole 123 along the second limiting groove 124, so that the installation operation can be simplified, and the assembly stability can be improved.
[0093] Among them, referring to Figure 6 and Figure 7 The bottom of the first mounting hole 113 is provided with a plurality of first bosses 115, and the plurality of first bosses 115 correspond to the plurality of first limiting grooves 114, that is, the first boss 115 protrudes into the first limiting groove 114 based on the bottom of the first mounting hole 113. The first boss 115 is arranged to correspond to the first mounting leg 212, so that the first mounting leg 212 can be stably abutted to the bottom of the first mounting hole 113.
[0094] At the same time, the length of the second mounting leg 213 is greater than that of the first mounting leg 212, and the length difference between the two is the same as the protrusion height of the first boss 115, so that the second mounting leg 213 can be stably abutted to the bottom of the second mounting hole 123. Such arrangement not only facilitates the identification of the assembly direction during assembly and improves the assembly accuracy, but also ensures the stable installation of the arc extinguishing grid 21 in the arc extinguishing cover 1, which is conducive to improving the arc extinguishing effect of the arc extinguishing chamber 100.
[0095] In this embodiment, referring to Figure 6 and Figure 7The first limiting grooves 114 are arranged between the two adjacent first bosses 115. The second mounting hole 123 is provided with a plurality of second bosses 125 corresponding to a plurality of second limiting grooves 124. The second limiting grooves 124 are arranged between the two adjacent second bosses 125, and the positions of the second bosses 125 correspond to the positions of the first limiting grooves 114 arranged between the two adjacent first bosses 115. The positions of the first bosses 115 correspond to the positions of the second limiting grooves 124 arranged between the two adjacent second bosses 125.
[0096] The arrangement can make the installation directions of the two adjacent arc-extinguishing vanes 21 opposite, so as to satisfy the staggered arrangement of the arc-contacting openings 211 of the two adjacent arc-extinguishing vanes 21 in the foregoing embodiments, thereby achieving the effect of lengthening the arc and further improving the arc-extinguishing effect of the arc-extinguishing chamber 100.
[0097] In some examples, the first side wall 11 is provided with a first arc-running path (not shown in the figure) communicating with the through hole 131, and the second side wall 12 is provided with a second arc-running path communicating with the through hole 131.
[0098] Based on the foregoing embodiments of the present application, the arrangement of the first arc-running path and the second arc-running path helps the arc to accurately move to the through hole 131 along the first side wall 11 and the second side wall 12, and the first arc-running path and the second arc-running path can also buffer the arc to some extent, thereby reducing the risk of damage to the vane assembly 2 caused by the arc.
[0099] The first arc-running path can be laid on the first side wall 11 along the third guide slope 112 and the first guide slope 111 to the position of the through hole 131, and the second arc-running path can be laid on the second side wall 12 along the fourth guide slope 122 and the second guide slope 121 to the position of the through hole 131.
[0100] The first arc-running path and the second arc-running path can be arranged simultaneously or only one of them can be arranged. When the first arc-running path and the second arc-running path are arranged simultaneously, the first arc-running path and the second arc-running path can correspond to each other, so that the arc entering the through slot 14 can move to the through hole 131 along the first arc-running path and the second arc-running path simultaneously, which is more conducive to providing guidance and buffering for the arc.
[0101] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. An arc quenching chamber, characterized in that, The application relates to an arc-extinguishing cover, a grid assembly and a contact assembly. The arc-extinguishing cover is provided with a through slot, the through slot comprises a first side wall, a second side wall and a third side wall, and the first side wall and the second side wall are oppositely arranged on two sides of the third side wall. The third side wall is provided with a through hole, and the through hole is communicated with the through slot and the grid assembly. The first side wall is provided with a first guide slope, and the second side wall is provided with a second guide slope. The first guide slope and the second guide slope are oppositely arranged, and the distance between the side of the first guide slope close to the through hole and the side of the second guide slope close to the through hole is smaller than the distance between the side of the first guide slope far from the through hole and the side of the second guide slope far from the through hole.
2. The arc chute of claim 1, wherein, The first side wall is further provided with a third guide slope, and the third guide slope is arranged on the side of the first guide slope far from the through hole.
3. The arc chute of claim 2, wherein, The second side wall is further provided with a fourth guide slope, and the fourth guide slope is arranged on the side of the second guide slope far from the through hole.
4. The arc chute of claim 3, wherein, The distance between the side of the third guide slope close to the first guide slope and the side of the fourth guide slope close to the second guide slope is smaller than the distance between the side of the third guide slope far from the first guide slope and the side of the fourth guide slope far from the second guide slope.
5. The arc chute of claim 3, wherein, The width of the first guide slope from the side close to the through hole to the side far from the through hole is smaller than the width of the third guide slope from the side close to the first guide slope to the side far from the first guide slope, and the included angle between the first guide slope and the third guide slope is obtuse.
6. The arc chute of claim 3, wherein, The width of the second guide slope from the side close to the through hole to the side far from the through hole is smaller than the width of the fourth guide slope from the side close to the second guide slope to the side far from the second guide slope, and the included angle between the second guide slope and the fourth guide slope is obtuse.
7. The arc chute according to any one of claims 1 to 6, characterized in that The third side wall is provided with a first transition surface and a second transition surface, the first transition surface is arranged between the first guide slope and the through hole, and the second transition surface is arranged between the second guide slope and the through hole.
8. The arc chute according to any one of claims 1 to 6, characterized in that The side of the arc-extinguishing cover far from the through slot is provided with a first mounting hole and a second mounting hole. The grid assembly comprises at least two arc-extinguishing grids, the arc-extinguishing grids are provided with a first mounting leg and a second mounting leg, the length of the first mounting leg is smaller than the length of the second mounting leg, the first mounting leg is correspondingly mounted in the first mounting hole, and the second mounting leg is correspondingly mounted in the second mounting hole.
9. The arc chute according to any one of claims 1 to 6, characterized in that The first side wall is provided with a first arc running path communicated with the through hole, and / or the second side wall is provided with a second arc running path communicated with the through hole.
10. A switching device, characterized by The application further relates to a contact assembly comprising the arc-extinguishing cover and the grid assembly.