Switch

Abstract

A switch belongs to the technical field of low-voltage apparatuses. Comprising a shell, an arc extinguish chamber and a contact system, the contact system and the arc extinguish chamber are contained in the shell, the arc extinguish chamber comprises a first grid piece set and a second grid piece set, the first grid piece set and the second grid piece set are connected in series, the first grid piece set and the second grid piece set are arranged side by side in the first direction, and the first grid piece set and the second grid piece set are arranged front and back in the second direction. The first direction is the width direction of the switch, and the second direction is the length direction of the switch. The switch has the advantages that the space of the switch is reasonably utilized, and wiring of the switch is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low voltage electrical apparatus technical field, and specifically relates to a switch. BACKGROUND

[0002] Switch is a kind of very important electrical apparatus in power supply and distribution circuit, can cut off the current to realize the disconnection of circuit, play the role of protecting line and electrical equipment.Switch usually includes contact system, and contact system includes moving contact and static contact, moving contact is contacted or separated with static contact after action, and then make switch itself realize conduction or disconnection.As known in the industry, when switch breaks, electric arc is generated between moving contact and static contact, and electric arc energy is relatively large, which causes great difficulty in switch breaking, only when electric arc is extinguished, circuit can be disconnected.In view of this, arc extinguishing chamber is usually arranged in switch, and electric arc enters arc extinguishing chamber under the joint action of magnetic blowing force and gas blowing force, and is cut into multiple series short arcs by grid piece, so as to improve arc voltage and make electric arc extinguish.The role of arc extinguishing chamber in ensuring the safe operation of electrical equipment is indisputable.

[0003] With the continuous development of new energy industry, the application scenarios of high-voltage equipment are more and more.For the sake of market demand, switch itself needs to meet the requirement of higher voltage, and as a functional component for extinguishing electric arc in switch, arc extinguishing chamber needs to meet the requirement of higher voltage, and further needs to have higher arc voltage when electric arc enters grid piece group in arc extinguishing chamber, therefore, it is urgent to increase the number of grid piece stacking to effectively improve arc voltage, and then make electric arc extinguish quickly.

[0004] In view of the above prior art, the applicant has made beneficial design, and the technical scheme to be introduced below is generated in this background. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a kind of switch, it includes first grid piece group and second grid piece group in series and side by side arrangement, to increase the number of grid piece stacking, and first grid piece group and second grid piece group are arranged in front and back, to reasonably utilize the space in switch.

[0006] The utility model aims at achieving, a kind of switch, including shell, arc extinguishing chamber and contact system, the contact system and arc extinguishing chamber are inducted in shell, the arc extinguishing chamber includes first grid piece group and second grid piece group, the first grid piece group and second grid piece group are in series arrangement, in first direction, the first grid piece group and second grid piece group are side by side arrangement, in second direction, the first grid piece group and second grid piece group are arranged in front and back, first direction is the width direction of switch, and second direction is the length direction of switch.

[0007] In one specific embodiment of the utility model, the first grid group and the second grid group are staggered.

[0008] In another specific embodiment of the utility model, the arc extinguishing chamber further comprises an arc extinguishing chamber shell and a partition plate, the first grid group and the second grid group are arranged inside the arc extinguishing chamber shell, the partition plate is arranged between the first grid group and the second grid group, and the air inlet of the first grid group and the air inlet of the second grid group are arranged side by side in the first direction.

[0009] In still another specific embodiment of the utility model, in the second direction, the distance between the second grid group and the contact system is greater than the distance between the first grid group and the contact system.

[0010] In still another specific embodiment of the utility model, the contact system comprises a moving contact and a stationary contact, and the moving contact is arranged on the rotating shaft.

[0011] In still another specific embodiment of the utility model, the stationary contact further comprises a wiring terminal arranged on the side of the stationary contact facing the air outlet of the switch, the wiring terminal is used for electrically connecting the switch with the outside, and the wiring part of the wiring terminal is exposed to the outside of the arc extinguishing chamber.

[0012] In still another specific embodiment of the utility model, the arc extinguishing chamber further comprises a middle arc striking piece arranged in series with the first grid group and the second grid group, the middle arc striking piece comprises a first matching part and a second matching part, the first matching part is arranged on the outer side below the first grid group, and the second matching part is arranged on the outer side above the second grid group.

[0013] In still another specific embodiment of the utility model, the grid array direction of the first grid group and the second grid group is consistent with the direction of the line connecting the moving contact and the stationary contact, the middle arc striking piece further comprises a first connecting part and a second connecting part, the first matching part, the first connecting part, the second connecting part and the second matching part are sequentially connected, the first connecting part is arranged horizontally, and the second connecting part is arranged vertically.

[0014] In still another specific embodiment of the utility model, the moving contact further comprises a moving arc striking piece corresponding to the moving contact, and the stationary contact comprises a stationary arc striking piece, the moving arc striking piece comprises a third matching part, a communication part and a bending part which are sequentially connected, the third matching part is arranged above the first grid group, the bending part extends away from the moving contact, and one end of the communication part is connected to the third matching part, and the other end of the communication part is connected to the bending part.

[0015] In still another specific embodiment of the utility model, the static arc extinguishing sheet comprises a fourth matching part and a fifth matching part matched with the static arc contact of the static contact, the extended end of the fifth matching part is below the second grid sheet group of the array, and the fifth matching part spans the first grid sheet group and the second grid sheet group.

[0016] The utility model discloses have the beneficial effect that compared with the prior art: the stacking number of the grid sheet is increased, so that the arc pressure can be effectively improved, and the arc can be quickly extinguished, and in the second direction, the first grid sheet group and the second grid sheet group are arranged in front and back, and the space is reasonably utilized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the sectional view of the switch of the utility model;

[0018] Figure 2 It is the internal plan view of the switch in the first embodiment of the utility model;

[0019] Figure 3 It is the open side view of the arc extinguishing chamber of the utility model;

[0020] Figure 4 It is the structural schematic diagram of the intermediate arc leading sheet of the utility model;

[0021] Figure 5 It is the position schematic diagram of the first grid sheet group and the second grid sheet group in the second embodiment of the utility model;

[0022] Figure 6 It is the position schematic diagram of the first grid sheet group and the second grid sheet group in the third embodiment of the utility model;

[0023] Figure 7 It is the position schematic diagram of the first grid sheet group and the second grid sheet group in the fourth embodiment of the utility model.

[0024] In the drawing: 1. shell, 11. base, 111. side wall, 112. partition wall, 12. middle cover, 13. upper cover;2. arc extinguishing chamber, 21. first grid sheet group, 22. second grid sheet group, 23. arc extinguishing chamber shell, 24. spacing plate;3. rotating shaft;4. moving contact;5. static contact;6. mechanism;7. handle;8. terminal;100. intermediate arc leading sheet, 101. first matching part, 102. first connecting part, 103. second connecting part, 104. second matching part;200. moving arc leading sheet, 201. third matching part, 202. communication part, 203. bending part;300. static arc leading sheet, 301. fourth matching part, 302. fifth matching part. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in combination with the drawings, but the description of the embodiments is not a limitation on the technical solutions, and any change in form but not in substance according to the utility model concept should be regarded as the protection scope of the utility model.

[0026] In the following description, the concepts of up, down, left, right, front and back (or called directionality) are all in view of the position state of the figure being described, and the purpose is to facilitate the public to understand, so it cannot be understood as a special limitation on the technical solutions provided by the utility model. Embodiment 1

[0027] As shown in Figure 1 The switch comprises 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.

[0028] The moving contact 4 and the stationary contact 5 constitute a contact system. The moving contact 4 is installed on the rotating shaft 3, and when the rotating shaft 3 rotates, it can drive the moving contact 4 to rotate, so that the moving contact 4 realizes contact or separation with the stationary contact 5, and the switch performs closing and opening. At the same time, 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. When the switch is closed or opened, the rotating shaft 3 is switched between the closing and opening positions by the traction of the mechanism 6, and the mechanism 6 is triggered by the handle 7 to act, that is, the operator can drive the mechanism 6 to perform closing and opening action by pushing and pulling the handle 7.

[0029] A first cavity corresponding to the rotating shaft 3 and a second cavity corresponding to the arc extinguishing chamber 2 are formed in the housing 1, and the moving contact 4 is installed in the rotating shaft 3 in the first cavity. A first cavity and a second cavity corresponding thereto are communicated and constitute a contact arc extinguishing cavity. The arc extinguishing chamber 2 is located on one side of the moving contact 4 and the stationary contact 5, and the 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. When the arc is extinguished in the arc extinguishing chamber 2, the circuit is cut off.

[0030] As shown in Figure 2 and in combination with Figure 1 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).

[0031] As shown in Figure 2As 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, while the second cavity corresponding to 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-electrode housing, but the invention is not limited to the modification of a three-electrode housing. For example, it could be a modified four-pole housing. In the case of a modified four-pole housing, a space connecting the two first cavities is also provided between them, and the width of this space is the same as the width of the two first cavities. Alternatively, it could 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 the width of the second cavity. Preferably, in the first direction, the second cavity protrudes to both sides; or, in the extension direction from the contact system to the arc-extinguishing chamber 2, i.e., the second direction, the width of the cavity gradually increases.

[0032] like Figures 1 to 3 As 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, the first grid plate group 21 and the second grid plate group 22 are placed inside the arc-extinguishing chamber shell 23, and the spacer plate 24 is located between the first grid plate group 21 and the second grid plate group 22. The air inlets of the first grid plate group 21 and the second grid plate group 22 are arranged side by side in a first direction. 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 is used to connect 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 to existing technologies, the arc-extinguishing chamber 2 increases the number of stacked grid plates, thus effectively increasing the arc voltage and enabling the arc to be extinguished quickly.

[0033] In the embodiment, the first and second groups of grids 21 and 22 are arranged side by side in the first direction. The array direction of the first and second groups of grids 21 and 22 is consistent with the connecting direction of the moving contact 4 and the static contact 5, i.e. the grids are arranged along the connecting direction of the moving contact 4 and the static contact 5.

[0034] More specifically, the first and second groups of grids 21 and 22 are arranged in front of and behind each other in the second direction. Specifically, the distance between the second group of grids 22 and the contact system is greater than the distance between the first group of grids 21 and the contact system.

[0035] Further, as shown in Figure 3 and Figure 4 the arc-extinguishing chamber 2 further comprises a middle arc-ignition piece 100 connecting the first and second groups of grids 21 and 22 in series. The middle arc-ignition piece 100 comprises a first matching portion 101, a first connecting portion 102, a second connecting portion 103 and a second matching portion 104 connected in sequence. Specifically, the first matching portion 101 is located outside below the first group of grids 21 in array. The first matching portion 101 is arranged in parallel with the grids in the first group of grids 21. Preferably, the shape of the first matching portion 101 is consistent with the shape of the grids in the first group of grids 21. One end of the first connecting portion 102 is connected to the first matching portion 101, and the other end is connected to the second connecting portion 103. The first connecting portion 102 penetrates the first and second groups of grids 21 and 22, and the second matching portion 104 is located outside above the second group of grids 22 in array. More preferably, the first connecting portion 102 is arranged horizontally, and the second connecting portion 103 is arranged vertically.

[0036] Continuing to see Figure 4 , the arc-extinguishing chamber 2 has a moving arc-ignition piece 200 corresponding to the moving contact 4 inside. The static contact 5 comprises a static arc-ignition piece 300. The moving arc-ignition piece 200 comprises a third matching portion 201, a communication portion 202 and a bending portion 203 connected in sequence. Among them, the third matching portion 201 is located above the first group of grids 21 in array, and is parallel to the grids in the first group of grids 21. The bending portion 203 extends away from the moving contact 4. One end of the communication portion 202 is connected to the third matching portion 201, and the other end is connected to the bending portion 203.

[0037] The static arc-ignition piece 300 comprises a fourth matching portion 301 and a fifth matching portion 302 matched with the static arc contact of the static contact 5. The extended end of the fifth matching portion 302 is located below the second group of grids 22 in array. The fifth matching portion 302 spans the first and second groups of grids 21 and 22.

[0038] Further, the static contact 5 has a terminal 8 on the side facing the switch outlet, which is used for the switch to be connected to the outside, and the terminal 8 is exposed to the outside of the arc extinguishing chamber 2. In this embodiment, the first grid group 21 is located in the non-protruding part of the second cavity, and the second grid group 22 is at least partially located in the protruding part of the second cavity, so that the arc extinguishing chamber 2 corresponding to the first grid group 21 does not increase in size in the second direction, and the wiring space above the terminal 8 is exposed, facilitating wiring. Embodiment 2

[0039] Figure 5 The position of the first grid group 21 and the second grid group 22 in this embodiment is shown in the figure. The difference between this embodiment and the first embodiment is that the second grid group 22 is staggered with the first grid group 21. Specifically, in the first direction, the grids in the second grid group 22 are inclined to the first grid group 21, so that in the second direction (Y direction in the figure), the grids in the second grid group 22 are partially located behind the grids in the first grid group 21. The above position setting still falls within the scope of the present application, which is that the first grid group 21 and the second grid group 22 are arranged side by side in the first direction, and the first grid group 21 and the second grid group 22 are arranged in front of and behind each other in the second direction. Embodiment 3

[0040] Figure 6 The position of the first grid group 21 and the second grid group 22 in this embodiment is shown in the figure. The difference between this embodiment and the first embodiment is that the second grid group 22 is staggered with the first grid group 21. Specifically, in the first direction, the grids in the second grid group 22 are inclined to the first grid group 21, so that in the second direction (Y direction in the figure), the grids in the second grid group 22 are partially located behind the grids in the first grid group 21. The above position setting still falls within the scope of the present application, which is that the first grid group 21 and the second grid group 22 are arranged side by side in the first direction, and the first grid group 21 and the second grid group 22 are arranged in front of and behind each other in the second direction. Embodiment 4

[0041] Figure 7Fig. 2 is a schematic view of the positions of the first and second groups of grid plates in the first embodiment of the present application. In the first direction, the grid plates in the first group of grid plates 21 are parallel to the grid plates in the second group of grid plates 22. In the second direction, the grid plates in the first group of grid plates 21 are behind the grid plates in the second group of grid plates 22. Fig. 3 is a schematic view of the positions of the first and second groups of grid plates in the second embodiment of the present application. In the first direction, the grid plates in the first group of grid plates 21 are staggered with the grid plates in the second group of grid plates 22. In the second direction, the grid plates in the first group of grid plates 21 are in front of the grid plates in the second group of grid plates 22.

Claims

1. A switch comprising a housing (1), an arc chamber (2) and a contact system, the housing (1) containing the contact system and the arc chamber (2), the arc chamber (2) comprising a first set of vanes (21) and a second set of vanes (22), the first set of vanes (21) and the second set of vanes (22) being arranged in series, characterized in that: The first and second groups of louver plates (21, 22) are arranged side by side in a first direction, and are arranged in front of and behind each other in a second direction, the first direction being the width direction of the switch, and the second direction being the length direction of the switch.

2. A switch according to claim 1, characterised in that: The first and second groups of louver plates (21, 22) are arranged alternately.

3. A switch according to claim 1, wherein: The arc extinguishing chamber (2) further comprises an arc extinguishing chamber shell (23) and a partition plate (24), the first and second groups of louver plates (21, 22) are arranged inside the arc extinguishing chamber shell (23), the partition plate (24) is arranged between the first and second groups of louver plates (21, 22), and the air inlets of the first and second groups of louver plates (21, 22) are arranged side by side in the first direction.

4. A switch according to claim 1, wherein: In the second direction, the distance between the second group of louver plates (22) and the contact system is greater than the distance between the first group of louver plates (21) and the contact system.

5. A switch according to claim 3, wherein: The switch further comprises a rotating shaft (3), the contact system comprises a moving contact (4) and a stationary contact (5), and the moving contact (4) is arranged on the rotating shaft (3).

6. A switch according to claim 5, wherein: The stationary contact (5) further comprises a terminal (8) on the side facing the air outlet of the switch, the terminal (8) is used for electrically connecting the switch with the outside, and the terminal part of the terminal (8) is exposed to the outside of the arc extinguishing chamber (2).

7. A switch according to claim 6, characterised in that: The arc extinguishing chamber (2) further comprises a middle arc striking plate (100) arranged in series with the first and second groups of louver plates (21, 22), the middle arc striking plate (100) comprises a first fitting part (101) and a second fitting part (104), the first fitting part (101) is arranged on the outside below the first group of louver plates (21), and the second fitting part (104) is arranged on the outside above the second group of louver plates (22).

8. A switch according to claim 7, characterised in that: The louver plate array direction of the first and second groups of louver plates (21, 22) is consistent with the connection direction of the moving contact (4) and the stationary contact (5), the middle arc striking plate (100) further comprises a first connecting part (102) and a second connecting part (103), the first fitting part (101), the first connecting part (102), the second connecting part (103) and the second fitting part (104) are connected in sequence, the first connecting part (102) is arranged horizontally, and the second connecting part (103) is arranged vertically.

9. A switch according to claim 5, wherein: The moving arc striking piece (200) corresponding to the moving contact (4) is also included, and the static contact (5) includes a static arc striking piece (300); the moving arc striking piece (200) includes a third matching part (201), a communication part (202) and a bending part (203) connected in sequence, the third matching part (201) is located above the first grid group (21) of the array, the bending part (203) extends away from the moving contact (4), one end of the communication part (202) is connected to the third matching part (201), and the other end is connected to the bending part (203).

10. A switch according to claim 9, wherein: The static arc striking piece (300) includes a fourth matching part (301) and a fifth matching part (302) matched with the static arc contact of the static contact (5), the extended end of the fifth matching part (302) is located below the second grid group (22) of the array, and the fifth matching part (302) spans the first grid group (21) and the second grid group (22).

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