Arc extinguish chamber structure

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an arc extinguish chamber structure, which comprises an end cover, a housing and an arc extinguish assembly, the end cover and the housing are enclosed to form an arc extinguish chamber, the housing comprises an exhaust side wall, the inner side surface of the exhaust side wall is provided with a plurality of first exhaust channels communicated with the arc extinguish chamber at intervals along a first direction, and the first exhaust channels are communicated with the arc extinguish chamber. A plurality of second exhaust channels are formed in the outer side face of the exhaust side wall at intervals in the first direction, the second exhaust channels and the first exhaust channels are arranged in a staggered mode in the first direction, and the second exhaust channels communicate with the adjacent first exhaust channels. The arc extinguishing assembly comprises a plurality of arc extinguishing grid sheets which are arranged in the arc extinguishing chamber at intervals and are arranged at intervals in the second direction. According to the arc extinguish chamber structure provided by the utility model, the communication part of the first exhaust channel and the corresponding second exhaust channel buffers expansion gas, so that the splashing distance of electric arcs and molten particles is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an arc extinguishing chamber structure. Background Art

[0002] A contactor is a device that can quickly cut off the AC and DC main circuits and can frequently connect and disconnect high-current control circuits. It has a low-voltage release protection function and is suitable for frequent operation and remote control. It is one of the important components in the automatic control system. When the contactor connects and disconnects the circuit, an arc will be generated, and the arc will be extinguished through the arc extinguishing chamber structure. Specifically, the arc is extinguished after the arc extinguishing grid in the arc extinguishing chamber structure along with the expanding gas, and the expanding gas is directly discharged from the exhaust hole of the arc extinguishing chamber structure.

[0003] In the prior art, the exhaust hole is usually a through hole extending in one direction. If an unextinguished arc and molten particles generated by high temperature are mixed in the expanding gas and discharged from the exhaust hole, since the expanding gas is not blocked in the exhaust hole, the arc and molten particles may splash a long distance after passing through the exhaust hole, affecting safety. Utility Model Content

[0004] The utility model aims to provide an arc extinguishing chamber structure, which can effectively reduce the splashing distance of the arc and molten particles.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An arc extinguishing chamber structure is provided, comprising:

[0007] End caps;

[0008] A shell cover, which is enclosed with the end cover to form an arc extinguishing chamber, and the shell cover includes an exhaust side wall, wherein a plurality of first exhaust channels communicating with the arc extinguishing chamber are arranged at intervals along a first direction on the inner side surface of the exhaust side wall, and a plurality of second exhaust channels are arranged at intervals along the first direction on the outer side surface of the exhaust side wall, wherein the second exhaust channels are staggered with the first exhaust channels along the first direction, and the second exhaust channels are communicated with the adjacent first exhaust channels;

[0009] The arc extinguishing assembly comprises a plurality of arc extinguishing grids which are spaced apart and arranged in the arc extinguishing chamber along a second direction.

[0010] Optionally, the exhaust side wall comprises:

[0011] Side wall bottom plate;

[0012] A first side plate, disposed on the side wall bottom plate, wherein the first exhaust channel is provided on the first side plate;

[0013] There are multiple rib plates arranged at intervals along the first direction, and the rib plates are arranged on the side of the first side plate facing away from the arc extinguishing chamber. The second exhaust channel is formed between two adjacent rib plates, and the rib plates and the first exhaust channel are arranged to overlap in a one-to-one manner along the second direction.

[0014] Optionally, a clearance groove communicating with the first exhaust channel is formed on the rib plate, and the clearance groove and the first exhaust channel are both arranged to penetrate the side wall bottom plate along a third direction.

[0015] Optionally, a plurality of protrusions are extended at intervals along the first direction from one end of the arc-extinguishing grid toward the end cover, and the protrusions respectively overlap with at least one of the first exhaust channels along the second direction.

[0016] Optionally, a third exhaust channel is formed between the end cover and the exhaust side wall.

[0017] Optionally, a stepped portion is provided on the outer periphery of the shell cover, and the stepped portion is inserted into the end cover.

[0018] Optionally, the end cover includes a border portion, the border portion includes an air-blocking border arranged corresponding to the exhaust side wall, the end of the air-blocking border is arranged to protrude from the second exhaust channel along a third direction, or the end of the air-blocking border is arranged to be flush with a side channel wall of the second exhaust channel away from the end cover along the third direction.

[0019] Optionally, the shell cover includes two exhaust side walls spaced apart along the second direction, and two arc extinguishing assemblies are provided and are arranged in one-to-one correspondence with the exhaust side walls.

[0020] Optionally, the shell cover further comprises two supporting side walls spaced apart along the first direction, a plurality of limiting grooves are formed on the supporting side walls, and the limiting grooves correspond to and accommodate corresponding side edges of the arc-extinguishing grid pieces.

[0021] Optionally, the shell cover also includes a supporting base plate, and the two sides of the supporting base plate along the first direction are respectively connected to the supporting side walls on the corresponding sides, and the supporting base plate is located between the two arc extinguishing assemblies, and an arc starting plate is arranged between the supporting base plate and the end cover.

[0022] Beneficial effects:

[0023] The utility model provides an arc extinguishing chamber structure, in which the electric arc and molten particles are discharged from the arc extinguishing chamber along with the expanding gas through the first exhaust channel and the second exhaust channel in sequence, and the first exhaust channel and the second exhaust channel are staggered along the first direction, so that the connecting point between the first exhaust channel and the corresponding second exhaust channel can form a buffer for the expanding gas, effectively reducing the splashing distance of the electric arc and the molten particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the arc extinguishing chamber structure provided by the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the housing provided by the utility model from one perspective;

[0026] Figure 3 This is a schematic structural diagram of the housing provided by the utility model from another viewing angle;

[0027] Figure 4 It is a partial cross-sectional view of the shell cover provided by the utility model;

[0028] Figure 5 It is a schematic diagram of a part of the structure of the arc extinguishing chamber provided by the utility model;

[0029] Figure 6 It is a structural schematic diagram of the end cover provided by the utility model;

[0030] Figure 7 It is a partial cross-sectional view of another part of the arc extinguishing chamber structure provided by the utility model.

[0031] In the figure:

[0032] 100, end cover; 101, third exhaust channel; 110, surrounding edge; 111, air blocking surrounding edge;

[0033] 200, shell cover; 201, step portion; 210, exhaust side wall; 2101, first exhaust channel; 2102, second exhaust channel; 2103, give way groove; 2104, first through hole; 211, side wall bottom plate; 212, first side plate; 213, rib plate; 214, second side plate; 220, supporting side wall; 221, limiting groove; 230, supporting bottom plate; 231, positioning groove; 2311, positioning protrusion; 232, second through hole;

[0034] 300, arc extinguishing assembly; 310, arc extinguishing grid; 311, raised portion;

[0035] 400. Arc starting plate. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] Reference Figure 1 to Figure 2 As shown, this embodiment provides an arc extinguishing chamber structure, which includes an end cover 100 , a shell 200 and an arc extinguishing assembly 300 .

[0041] The end cover 100 and the shell 200 are enclosed to form an arc extinguishing chamber, and the shell 200 includes an exhaust side wall 210, and the inner side of the exhaust side wall 210 is provided with a plurality of first exhaust channels 2101 connected to the arc extinguishing chamber at intervals along the first direction, and the outer side of the exhaust side wall 210 is provided with a plurality of second exhaust channels 2102 at intervals along the first direction, and the second exhaust channels 2102 and the first exhaust channels 2101 are arranged alternately along the first direction, and the second exhaust channels 2102 are connected to the adjacent first exhaust channels 2101; the arc extinguishing assembly 300 includes a plurality of arc extinguishing grids 310 arranged at intervals along the second direction in the arc extinguishing chamber. Figure 1 The a direction in the figure is the first direction, and the first direction may be the length direction of the shell.

[0042] In this embodiment, the electric arc and molten particles are discharged from the arc extinguishing chamber along with the expanding gas through the first exhaust channel 2101 and the second exhaust channel 2102 in sequence. The first exhaust channel 2101 and the second exhaust channel 2102 are staggered along the first direction, so that the connecting point between the first exhaust channel 2101 and the corresponding second exhaust channel 2102 can form a buffer for the expanding gas, effectively reducing the splashing distance of the electric arc and the molten particles.

[0043] In this embodiment, refer to Figures 2 to 4 As shown, the exhaust side wall 210 includes a side wall bottom plate 211, a first side plate 212 and a rib plate 213. The first side plate 212 is provided on the side wall bottom plate 211, a first exhaust channel 2101 is provided on the first side plate 212, a plurality of rib plates 213 are provided at intervals along the first direction, the rib plates 213 are provided on the side of the first side plate 212 facing away from the arc extinguishing chamber, the second exhaust channel 2102 is formed between two adjacent rib plates 213, and the rib plates 213 and the first exhaust channel 2101 are provided in a one-to-one correspondence and overlapped arrangement along the second direction. The rib plates 213 extend along the third direction until they abut against the side wall bottom plate 211. In this embodiment, the ribs 213 and the first exhaust channel 2101 are arranged in a one-to-one correspondence along the second direction, that is, the ribs 213 can form a buffer for the expanding gas, and form a diversion under the action of the ribs 213, and the expanding gas can be guided to the second exhaust channel 2102 for discharge through the ribs 213, effectively reducing the splash distance of the arc and the molten particles. Figure 2 The b direction in the figure is the second direction, and the second direction may be the width direction of the housing. Figure 2 The c direction in the figure is the third direction, and the second direction may be the height direction of the housing.

[0044] Specifically, the exhaust side wall 210 further includes a second side plate 214, which is spaced apart from the first side plate 212 along the second direction, and is located outside the first side plate 212, and the rib plate 213 extends along the first direction to abut against the second side plate 214. In this embodiment, the second side plate 214 can reinforce the rib plate 213 to stabilize the structure of the exhaust side wall 210, and the second side plate 214 can block part of the second exhaust channel 2102.

[0045] Specifically, a clearance groove 2103 communicating with the first exhaust channel 2101 is provided on the rib plate 213, and the clearance groove 2103 and the first exhaust channel 2101 are both arranged along the third direction to penetrate the side wall bottom plate 211. In this embodiment, the first exhaust channel 2101 can be communicated with the second exhaust channel 2102 by the arrangement of the clearance groove 2103, and the clearance groove 2103 and the first exhaust channel 2101 are both arranged along the third direction to penetrate the side wall bottom plate 211, which is more suitable for the expansion gas to enter the first exhaust channel 2101 and the clearance groove 2103, which can increase the speed of arc extinguishing and ensure the arc extinguishing effect.

[0046] Specifically, the end cover 100 and the housing 200 can be fastened and connected by bolts. Part of the ribs 213 are provided with first through holes 2104 for the bolts to pass through.

[0047] In a possible implementation, Figure 5 As shown, the arc extinguishing grid 310 has a plurality of protrusions 311 extending at intervals along the first direction at one end facing the end cover 100, and the plurality of protrusions 311 respectively overlap with at least one first exhaust channel 2101 along the second direction. It can be understood that a groove is formed between two adjacent protrusions, and the groove and the first exhaust channel 2101 are arranged alternately along the first direction. The groove has the function of guiding the expansion gas, and the expansion gas flowing through the groove will be blocked by the first side plate 212 to form a buffer, and then flow through the first exhaust channel 2101 and the second exhaust channel 2102 in sequence, which can further reduce the splash distance of the arc and the molten particles.

[0048] In this embodiment, refer to Figure 2 , Figure 6 and Figure 7 As shown, a stepped portion 201 is provided on the outer periphery of the shell cover 200 , and the stepped portion 201 is inserted into the end cover 100 to facilitate the assembly between the shell cover 200 and the end cover 100 .

[0049] Specifically, the end cover 100 includes a peripheral portion 110 , and the step portion 201 is inserted into the peripheral portion 110 to form a positioning, so as to facilitate the assembly between the shell 200 and the end cover 100 .

[0050] Furthermore, the edge portion 110 includes an air-blocking edge 111 arranged corresponding to the exhaust side wall 210, and an end of the air-blocking edge 111 is arranged to protrude from the second exhaust channel 2102 along a third direction, or an end of the air-blocking edge 111 is arranged to be flush with a side channel wall of the second exhaust channel 2102 away from the end cover 100 along the third direction. The expanding gas discharged from the second exhaust channel 2102 will be blocked by the air-blocking edge 111, further reducing the splashing distance of the arc and the molten particles.

[0051] In a feasible embodiment, a third exhaust channel 101 is formed between the end cover 100 and the exhaust side wall 210. Part of the expanded gas will be discharged through the third exhaust channel 101, and after being blocked by the gas blocking edge 111, it will form a collision with the expanded gas discharged from the second exhaust channel 2102, which can further reduce the splashing distance of the arc and the molten particles.

[0052] In this embodiment, refer to Figures 1 to 3As shown, the housing 200 includes two exhaust side walls 210 spaced apart along the second direction, and two arc extinguishing assemblies 300 are provided and are arranged one-to-one with the exhaust side walls 210. In this embodiment, two contact assemblies (not shown) controlling the same circuit correspond to the two arc extinguishing assemblies 300 one-to-one, and the arcs generated by the two contact assemblies controlling the same circuit can flow to the corresponding arc extinguishing assemblies 300 for arc extinguishing, thereby achieving a better arc extinguishing effect. Among them, the contact assembly includes a moving contact and a stationary contact.

[0053] Specifically, the shell cover 200 further includes two support side walls 220 spaced apart along the first direction, and a plurality of limiting grooves 221 are provided on the support side walls 220, and the limiting grooves 221 correspond to and accommodate the corresponding side edges of the arc-extinguishing grid 310, so as to realize the positioning and assembly of the arc-extinguishing grid 310 relative to the shell cover 200. Among them, the side of the limiting groove 221 facing the end cover 100 can penetrate the support side wall 220 along the third direction, so as to facilitate the arc-extinguishing grid 310 to pass into the limiting groove 221, so as to facilitate assembly. Exemplarily, the rib plate 213 located at the outermost side can be formed by the support side wall 220 on the corresponding side protruding inward along the first direction.

[0054] Specifically, the housing 200 further includes a supporting bottom plate 230, and the two sides of the supporting bottom plate 230 along the first direction are respectively connected to the supporting sidewall 220 on the corresponding side, and the supporting bottom plate 230 is located between the two arc extinguishing assemblies 300, and an arc-starting plate 400 is arranged between the supporting bottom plate 230 and the end cover 100. In this embodiment, the two ends of the arc-starting plate 400 extend to the arc-extinguishing assembly 300 on the corresponding side along the second direction, respectively, to guide the arc into the arc-extinguishing assembly 300 on the corresponding side. Among them, at least one arc-starting plate 400 is provided. Exemplarily, three arc-starting plates 400 are arranged at intervals along the first direction.

[0055] Specifically, at least one positioning groove 231 is provided on the support base plate 230, and the arc-striking plates 400 are placed in the positioning groove 231 one by one, so that the arc-striking plates 400 are stably fixed between the support base plate 230 and the end cover 100. Among them, at least one positioning protrusion 2311 is provided in the positioning groove 231, and a hole or groove corresponding to the positioning protrusion 2311 is provided on the arc-striking plate 400, and the position of the arc-striking plate 400 is limited by the positioning protrusion 2311.

[0056] In a feasible implementation, the support base plate 230 is provided with a second through hole 232 for the bolt to pass through. To prevent the bolt from interfering with the arc entering the arc extinguishing assembly 300, the second through hole 232 is a countersunk hole. A plurality of second through holes 232 may be provided. In this embodiment, by providing the second through hole 232, i.e., by threading and fastening the bolt at the support base plate 230, the support base plate 230 and the end cover 100 can clamp the arc striking plate 400.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An arc extinguishing chamber structure, characterized in that: include: End cap (100); A shell cover (200) is enclosed with the end cover (100) to form an arc extinguishing chamber, the shell cover (200) comprising an exhaust side wall (210), the inner side surface of the exhaust side wall (210) being provided with a plurality of first exhaust channels (2101) in communication with the arc extinguishing chamber at intervals along a first direction, the outer side surface of the exhaust side wall (210) being provided with a plurality of second exhaust channels (2102) in communication with the first exhaust channels (2101) at intervals along the first direction, the second exhaust channels (2102) and the first exhaust channels (2101) being arranged in a staggered manner along the first direction, and the second exhaust channels (2102) being in communication with the adjacent first exhaust channels (2101); The arc extinguishing assembly (300) comprises a plurality of arc extinguishing grids (310) which are arranged in the arc extinguishing chamber at intervals and arranged at intervals along a second direction.

2. The arc extinguishing chamber structure according to claim 1, characterized in that: The exhaust side wall (210) comprises: Side wall bottom plate (211); A first side plate (212) is disposed on the side wall bottom plate (211), and the first exhaust channel (2101) is opened on the first side plate (212); A plurality of rib plates (213) are arranged at intervals along a first direction, wherein the rib plates (213) are arranged on a side of the first side plate (212) facing away from the arc extinguishing chamber, and a second exhaust channel (2102) is formed between two adjacent rib plates (213), and the rib plates (213) and the first exhaust channel (2101) are arranged to overlap in a one-to-one correspondence along the second direction.

3. The arc extinguishing chamber structure according to claim 2, characterized in that: The rib plate (213) is provided with a clearance groove (2103) which is in communication with the first exhaust channel (2101); the clearance groove (2103) and the first exhaust channel (2101) are both arranged to penetrate the side wall bottom plate (211) along a third direction.

4. The arc extinguishing chamber structure according to claim 1, characterized in that: A plurality of protrusions (311) are extended at intervals along a first direction at one end of the arc extinguishing grid (310) facing the end cover (100); the plurality of protrusions (311) respectively overlap with at least one of the first exhaust channels (2101) along a second direction.

5. The arc extinguishing chamber structure according to claim 1, characterized in that: A third exhaust passage (101) is formed between the end cover (100) and the exhaust side wall (210).

6. The arc extinguishing chamber structure according to claim 1, characterized in that: The outer periphery of the shell cover (200) is provided with a stepped portion (201), and the stepped portion (201) is inserted into the end cover (100).

7. The arc extinguishing chamber structure according to claim 6, characterized in that: The end cover (100) comprises a peripheral edge portion (110), the peripheral edge portion (110) comprising an air-blocking peripheral edge (111) arranged corresponding to the exhaust side wall (210), an end portion of the air-blocking peripheral edge (111) being arranged to protrude from the second exhaust channel (2102) along a third direction, or an end portion of the air-blocking peripheral edge (111) being arranged to be flush with a channel wall of a side of the second exhaust channel (2102) away from the end cover (100) along the third direction.

8. The arc extinguishing chamber structure according to any one of claims 1 to 7, characterized in that: The housing (200) comprises two exhaust side walls (210) spaced apart along a second direction, and two arc extinguishing assemblies (300) are provided and are arranged in one-to-one correspondence with the exhaust side walls (210).

9. The arc extinguishing chamber structure according to claim 8, characterized in that: The housing (200) further comprises two supporting side walls (220) spaced apart along a first direction, a plurality of limiting grooves (221) being provided on the supporting side walls (220), the limiting grooves (221) correspondingly accommodating corresponding side edges of the arc-extinguishing grid pieces (310) one by one.

10. The arc extinguishing chamber structure according to claim 9, characterized in that: The shell cover (200) also includes a supporting base plate (230), wherein the supporting base plate (230) is respectively connected to the supporting side walls (220) on the corresponding sides along the first direction, and the supporting base plate (230) is located between the two arc extinguishing assemblies (300), and an arc-starting plate (400) is arranged between the supporting base plate (230) and the end cover (100).

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