Switch

Abstract

A switch belongs to the technical field of electrical equipment. Comprising a shell, an arc extinguish chamber, a rotating shaft and a contact system, the contact system comprises a moving contact and a static contact, a first cavity corresponding to the rotating shaft and a second cavity corresponding to the arc extinguish chamber are formed in the shell, the moving contact is installed in the rotating shaft in the first cavity, and the first cavity and the second cavity corresponding to the first cavity are communicated to form a contact arc extinguish cavity. The width of the second cavity is larger than that of the first cavity. The grid plate structure has the advantages that the accommodating space of the grid plates is increased, so that the stacking number of the grid plates is increased, the arc voltage can be effectively improved, and the requirement of high voltage is met.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and specifically relates to a switch. Background Technology

[0002] Switches are crucial electrical appliances in power supply and distribution lines. They interrupt the current carrying the circuit, protecting the lines and electrical equipment. A switch typically includes a contact system, which consists of moving and stationary contacts. When the moving contact actuates, it contacts or separates from the stationary contact, thus enabling the switch to conduct or disconnect. As is known in the industry, when a switch breaks, an electric arc is generated between the moving and stationary contacts. This arc has relatively large energy, posing a significant challenge to the switch's breaking action. The circuit can only be broken when the arc is extinguished. Therefore, a flash chamber is usually installed inside the switch. Under the combined action of magnetic and air force, the arc enters the flash chamber and is cut into multiple short arcs connected in series by the grid plates, thereby increasing the arc voltage and extinguishing the arc. The role of the flash chamber in ensuring the safe operation of electrical equipment is undeniable.

[0003] With the continuous development of the new energy industry, the application scenarios of high-voltage equipment are becoming increasingly diverse. In order to adapt to market demands, the switch itself needs to meet higher voltage requirements. As the functional component in the switch that extinguishes the arc, the arc-extinguishing chamber also needs to meet even higher extinguishing voltage requirements. Furthermore, it is necessary to have a higher arc voltage when the arc enters the grid assembly inside the arc-extinguishing chamber. Therefore, it is urgent to increase the number of stacked grids to effectively increase the arc voltage, thereby enabling the arc to be extinguished quickly.

[0004] In view of the aforementioned existing technology, the applicant has made beneficial designs, and the technical solutions to be introduced below are produced in this context. Utility Model Content

[0005] The purpose of this invention is to provide a switch that has an enlarged arc-extinguishing chamber in a first direction to accommodate more grid plates, thereby meeting the requirement for the number of grid plates stacked.

[0006] The purpose of this utility model is achieved as follows: a switch includes a housing, an arc-extinguishing chamber, a rotating shaft, and a contact system. The contact system includes a moving contact and a stationary contact. A first cavity corresponding to the rotating shaft and a second cavity corresponding to the arc-extinguishing chamber are formed inside the housing. The moving contact is installed in the rotating shaft inside the first cavity. The first cavity and the corresponding second cavity are connected to form a contact arc-extinguishing cavity. In a first direction, the width of the second cavity is greater than the width of the first cavity.

[0007] In a specific embodiment of this utility model, the arc-extinguishing chamber includes a first grid plate group and a second grid plate group arranged side by side, and the first grid plate group and the second grid plate group are connected in series.

[0008] In another specific embodiment of this utility model, the housing is a unipolar housing, and in the first direction, the second cavity protrudes to at least one side to increase the width of the second cavity.

[0009] In another specific embodiment of this utility model, the housing is a unipolar housing, and in the first direction, the second cavity protrudes to both sides.

[0010] In another specific embodiment of the present invention, in a first direction, the housing includes two contact arc-extinguishing cavities located on both sides. In the first direction, the second cavity of the contact arc-extinguishing cavities on both sides protrudes towards the center to expand the width of the second cavity.

[0011] In another specific embodiment of this utility model, the first grid plate group and the second grid plate group are placed inside the arc extinguishing chamber, and a spacer plate is provided between the first grid plate group and the second grid plate group.

[0012] In a further specific embodiment of this utility model, the first grid group and the second grid group are aligned in the second direction.

[0013] In a more specific embodiment of this utility model, in the second direction, the first grid group and the second grid group are arranged one after the other.

[0014] In yet another specific embodiment of this utility model, the arc-extinguishing chamber further includes a central arc-inducing plate connected in series with the first grid plate group and the second grid plate group. The central arc-inducing plate includes a first mating part and a second mating part. The first mating part is located on the outer side below the first grid plate group of the array, and the second mating part is located on the outer side above the second grid plate group of the array.

[0015] In another specific embodiment of this utility model, the width of the grid in the first grid group is greater than the width of the grid in the second grid group.

[0016] The present invention has the following advantages due to the above-mentioned structure: in the first direction, the width of the second cavity is greater than the width of the first cavity, which increases the accommodating space of the grid and thus increases the number of grids stacked, thereby effectively improving the arc voltage and meeting the requirements of high voltage. Attached Figure Description

[0017] Figure 1 This is a perspective sectional view of the switch described in this utility model;

[0018] Figure 2 This is an internal top view of the switch described in one embodiment of the present invention;

[0019] Figure 3 This is a side view of the opening of the arc-extinguishing chamber described in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the intermediate arc-starting piece described in this utility model;

[0021] Figure 5 This is an internal top view of the switch described in the second embodiment of this utility model.

[0022] In the figure: 1. Shell, 11. Base, 111. Side wall, 112. Partition wall, 12. Middle cover, 13. Top cover; 2. Arc extinguishing chamber, 21. First grid plate group, 22. Second grid plate group, 23. Arc extinguishing chamber shell, 24. Spacer plate; 3. Rotating shaft; 4. Moving contact; 5. Stationary contact; 6. Mechanism; 7. Handle; 8. Terminal block; 100. Middle arc ignition plate, 101. First mating part, 102. First connecting part, 103. Second connecting part, 104. Second mating part; 200. Moving arc ignition plate, 201. Third mating part, 202. Connecting part, 203. Bending part; 300. Stationary arc ignition plate, 301. Fourth mating part, 302. Fifth mating part. Detailed Implementation

[0023] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0024] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model. Example 1

[0025] like Figure 1 As shown, the switch includes a housing 1, an arc-extinguishing chamber 2, a rotating shaft 3, a moving contact 4, a stationary contact 5, a mechanism 6, and a handle 7.

[0026] The moving contact 4 and the stationary contact 5 together constitute a contact system. The moving contact 4 is mounted on the rotating shaft 3. When the rotating shaft 3 rotates, it drives the moving contact 4 to rotate, causing the moving contact 4 to contact or separate from the stationary contact 5, thus opening or closing the switch. Simultaneously, the moving contact 4 can also rotate relative to the rotating shaft 3, and the rotating shaft 3 can rotate relative to the housing 1. During switch opening and closing, the rotating shaft 3 is pulled by the mechanism 6 to switch between the open and closed positions, while the mechanism 6 is triggered by the handle 7, meaning the operator can drive the mechanism 6 to perform the opening and closing actions by pushing or pulling the handle 7.

[0027] The housing 1 contains a first cavity corresponding to the rotating shaft 3 and a second cavity corresponding to the arc-extinguishing chamber 2. A moving contact 4 is installed inside the rotating shaft 3 in the first cavity. The first cavity and the corresponding second cavity are connected to form a contact arc-extinguishing chamber. The arc-extinguishing chamber 2 is located on one side of the moving contact 4 and the stationary contact 5. The electric arc generated by the separation of the moving contact 4 and the stationary contact 5 moves away from the moving contact 4 and the stationary contact 5 and enters the arc-extinguishing chamber 2. The circuit is only cut off when the electric arc is extinguished in the arc-extinguishing chamber 2.

[0028] like Figure 2 and combined Figure 1 As shown, the width direction of the switch is the first direction (X direction in the figure), and the length direction of the switch is the second direction (Y direction in the figure). The first direction and the second direction are perpendicular.

[0029] like Figure 2 As shown, in the first direction, the rotating shaft 3 in the first cavity located on both sides of the housing 1 has a moving contact 4, and the corresponding second cavity of the first cavity protrudes towards the center to expand the accommodating width of the second cavity. Specifically, the housing 1 includes a base 11, a middle cover 12, and a top cover 13. A pair of upwardly extending sidewalls 111 are arranged parallel to each other on both sides of the base 11 in the first direction. A pair of partition walls 112 are arranged between the pair of sidewalls 111, spaced apart from each other. The middle cover 12 has an assembly plate (not shown) on the side facing the base 11. After the base 11 and the middle cover 12 are spliced, the assembly plate, the pair of sidewalls 111, and the pair of partition walls 112 cooperate to form the contact arc-extinguishing cavity. In this embodiment, an empty portion connecting the two first cavities is provided between them. The top cover 13 covers the middle cover 12. In this embodiment, the housing 1 is modified from a three-pole housing. However, the invention is not limited to the modification of a three-pole housing; for example, it can be modified from a four-pole housing. Regarding the modification of the four-pole housing, a gap connecting the two first cavities is also provided between them, the width of which is the width of the two first cavities. Alternatively, it can be a single-pole housing. Specifically, the housing 1 is a single-pole housing, and in the first direction, the second cavity protrudes to at least one side to increase its width. Preferably, in the first direction, the second cavity protrudes to both sides. Or, from the extension direction of the contact system towards the arc-extinguishing chamber 2, i.e., in the second direction, the width of the cavity gradually increases.

[0030] like Figures 1 to 3As shown, the arc-extinguishing chamber 2 includes a first grid plate group 21 and a second grid plate group 22, as well as an arc-extinguishing chamber shell 23 and a spacer plate 24. The arc-extinguishing chamber shell 23 serves as the outer shell of the arc-extinguishing chamber 2, and the spacer plate 24 is located between the first grid plate group 21 and the second grid plate group 22. The first grid plate group 21 and the second grid plate group 22 are connected in series. This series connection means that a conductive component connects the two ends of the two grid plate groups respectively, that is, one end of the conductive component extends to one end of the first grid plate group, and the other end of the conductive component extends to one end of the second grid plate group, so that after the arc enters the first grid plate group and the second grid plate group, the arc in the first grid plate group and the second grid plate group is in series. Compared with the prior art, the arc-extinguishing chamber 2 increases the number of stacked grid plates, thus effectively increasing the arc voltage and thereby extinguishing the arc quickly.

[0031] In this embodiment, the first grid plate group 21 and the second grid plate group 22 are arranged side by side and aligned. The grid plate array direction of the first grid plate group 21 and the second grid plate group 22 is consistent with the line direction connecting the moving contact 4 and the stationary contact 5, that is, the grid plates are arranged along the line direction connecting the moving contact 4 and the stationary contact 5.

[0032] More preferably, the width of the grid in the first grid group 21 is greater than the width of the grid in the second grid group 22.

[0033] Furthermore, such as Figure 3 and Figure 4 As shown, the arc-extinguishing chamber 2 further includes a central arc-inducing plate 100 connected in series with the first grid plate group 21 and the second grid plate group 22. The central arc-inducing plate 100 includes a first mating part 101, a first connecting part 102, a second connecting part 103, and a second mating part 104. The first mating part 101, the first connecting part 102, the second connecting part 103, and the second mating part 104 are connected sequentially. Specifically, the first mating part 101 is located on the outer side below the first grid plate group 21 of the array. The first mating part 101 is arranged parallel to the grid plates within the first grid plate group 21. Preferably, the shape of the first mating part 101 is consistent with the shape of the grid plates within the first grid plate group 21. One end of the first connecting part 102 is connected to the first mating part 101, and the other end is connected to the second connecting part 103. The first connecting part 102 penetrates through the first grid plate group 21 and the second grid plate group 22. The second connecting portion 103 connects the first connecting portion 102 and the second mating portion 104, and the second mating portion 104 is located on the outer side above the second grid group 22 of the array. More preferably, the first connecting portion 102 is arranged horizontally, while the second connecting portion 103 is arranged vertically.

[0034] See you later Figure 4The arc-extinguishing chamber contains a moving arc-inducing plate 200 corresponding to the moving contact 4 and a stationary arc-inducing plate 300 corresponding to the stationary contact 5. The moving arc-inducing plate 200 includes a third mating portion 201, a connecting portion 202, and a bending portion 203. The third mating portion 201, the connecting portion 202, and the bending portion 203 are connected sequentially. The third mating portion 201 is located above the first grid plate group 21 and is parallel to the grid plates within the first grid plate group 21. The bending portion 203 extends away from the moving contact 4. One end of the connecting portion 202 is connected to the third mating portion 201, and the other end is connected to the bending portion 203.

[0035] The stationary arc-drawing plate 300 includes a fourth mating portion 301 and a fifth mating portion 302 that mate with the stationary arc contact of the stationary contact 5. The extended end of the fifth mating portion 302 is located below the second grid plate group 22 of the array. The fifth mating portion 302 spans the first grid plate group 21 and the second grid plate group 22.

[0036] Furthermore, the stationary contact 5 has a terminal block 8 on the side facing the switch outlet. The terminal block 8 is used for electrical connection between the switch and the external environment, and the wiring portion of the terminal block 8 is exposed on the outside of the arc-extinguishing chamber 2. In this embodiment, the first grid plate group 21 is located in the non-protruding portion of the second cavity; while the second grid plate group 22 is at least partially located in the protruding portion of the second cavity. Therefore, the arc-extinguishing chamber 2 corresponding to the first grid plate group 21 is not increased in size in the second direction, allowing the wiring space above the terminal block 8 to be exposed, facilitating wiring. Example 2

[0037] like Figure 5 As shown, in this embodiment, the first grid group 21 and the second grid group 22 are arranged one after the other in a second direction. Specifically, the distance between the second grid group 22 and the contact system is greater than the distance between the first grid group 21 and the contact system. Everything else is the same as in Embodiment 1.

Claims

1. A switch comprising a housing (1), an arc-extinguishing chamber (2), a rotating shaft (3), and a contact system, wherein the contact system comprises a moving contact (4) and a stationary contact (5), a first cavity corresponding to the rotating shaft (3) and a second cavity corresponding to the arc-extinguishing chamber (2) are formed within the housing (1), the moving contact (4) is installed within the rotating shaft (3) in the first cavity, and the first cavity and the corresponding second cavity are connected to form a contact arc-extinguishing cavity, characterized in that: In the first direction, the width of the second cavity is greater than the width of the first cavity.

2. A switch according to claim 1, characterised in that: The arc-extinguishing chamber (2) comprises a first grid group (21) and a second grid group (22) arranged side by side, and the first grid group (21) and the second grid group (22) are arranged in series.

3. A switch according to claim 2, wherein: The shell (1) is a single-pole shell, and in the first direction, the second cavity protrudes to at least one side to expand the width of the second cavity.

4. A switch according to claim 3, wherein: The shell (1) is a single-pole shell, and in the first direction, the second cavity protrudes to both sides.

5. A switch according to claim 2, wherein: In the first direction, the shell (1) comprises two contact arc-extinguishing cavities located on both sides, and in the first direction, the second cavities of the two contact arc-extinguishing cavities protrude to the middle to expand the width of the second cavities.

6. A switch according to claim 2, wherein: The first grid group (21) and the second grid group (22) are arranged inside the arc-extinguishing chamber (2), and a spacing plate (24) is arranged between the first grid group (21) and the second grid group (22).

7. A switch according to claim 6, characterised in that: In the second direction, the first grid group (21) and the second grid group (22) are arranged in alignment.

8. A switch according to claim 6, wherein: In the second direction, the first grid group (21) and the second grid group (22) are arranged in front of and behind each other.

9. A switch according to either one of claims 7 or 8, characterised in that: The arc-extinguishing chamber (2) further comprises a middle arc striking piece (100) in series with the first grid group (21) and the second grid group (22), the middle arc striking piece (100) comprises a first matching part (101) and a second matching part (104), the first matching part (101) is located below the outer side of the first grid group (21), and the second matching part (104) is located above the outer side of the second grid group (22).

10. A switch according to either one of claims 7 or 8, characterised in that: The width of the grid in the first grid group (21) is greater than the width of the grid in the second grid group (22).

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