Switch arc extinguish chamber with arc striking sheet

Abstract

The utility model discloses a switch arc extinguish chamber with an arc striking sheet, and belongs to the technical field of voltage electric appliances. Which comprises a pair of side walls, grid sheets arrayed between the pair of side walls and a movable arc striking sheet, the movable arc striking sheet is used for guiding an arc to enter an arc extinguish chamber, and is characterized in that the movable arc striking sheet comprises a lower arc striking piece and an upper arc striking piece, the upper end of the upper arc striking piece is located on the outer side of the arrayed grid sheets, and the lower end of the upper arc striking piece is used for being connected with the upper end of the lower arc striking piece; the lower end of the lower arc striking piece extends towards a contact system of the switch, and the current-carrying cross section area of the lower arc striking piece is larger than the current-carrying cross section area of the upper arc striking piece. The movable arc striking piece has the advantages that the movable arc striking piece comprises the upper arc striking piece and the lower arc striking piece, and the thickness of the lower arc striking piece is larger than that of the upper arc striking piece so as to cope with burning of electric arcs, so that the service life of the movable arc striking piece is prolonged; furthermore, the split movable arc striking sheet is adopted, so that the effect can be improved, the manufacturing cost can be reduced, and the competitiveness of the product can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low voltage electrical apparatus technical field, concretely relates to a switch arc-extinguishing chamber with arc guiding piece. BACKGROUND

[0002] Switch, especially disconnecting switch as important low voltage electrical apparatus, its realization is to the control of the current breakover, to satisfy the management of power supply network on-off.

[0003] Generally, switch includes contact system and arc-extinguishing chamber, and the arc produced when the contact system breaks the current is extinguished in the arc-extinguishing chamber. In order to guide the arc into the arc-extinguishing chamber, a movable arc guiding piece is usually provided on the side of the movable contact, the lower end of the movable arc guiding piece is matched with the movable contact, and the upper end of the movable arc guiding piece is inserted into the outside of one end of the arrayed grid group in the arc-extinguishing chamber, so as to guide the arc into the grid group. In the prior art, the movable arc guiding piece is usually made by bending metal plate, and the thickness of the metal plate is greatly limited by the bending process. Therefore, the life of the movable arc guiding piece made by bending is usually low due to the limitation of its thickness. The ordinary skilled in the art has been pursuing a movable arc guiding piece with high life. SUMMARY

[0004] The utility model provides a switch arc-extinguishing chamber with arc guiding piece, which improves the life of the movable arc guiding piece and reduces the manufacturing cost by improving the structure of the movable arc guiding piece to cope with the burning of the arc.

[0005] The utility model accomplishes the task in the following way. A switch arc-extinguishing chamber with arc guiding piece includes a pair of side walls, a grid arrayed between the pair of side walls, and a movable arc guiding piece. The movable arc guiding piece is used to guide the arc into the arc-extinguishing chamber. The movable arc guiding piece includes a lower arc guiding part and an upper arc guiding part. The upper end of the upper arc guiding part is located outside the arrayed grid. The lower end of the upper arc guiding part is connected to the upper end of the lower arc guiding part. The lower end of the lower arc guiding part extends to the contact system of the switch. The current-carrying cross-sectional area of the lower arc guiding part is larger than that of the upper arc guiding part.

[0006] In one specific embodiment of the utility model, a pair of gas generating parts are further included. The pair of gas generating parts are arranged at intervals and form an arc passage. The lower arc guiding part is located in the arc passage and has a mounting protrusion in the arc passage. The lower arc guiding part is sleeved on the mounting protrusion.

[0007] In another specific embodiment of the utility model, the width of the lower arc guiding part is greater than that of the upper arc guiding part.

[0008] In another specific embodiment of the utility model, the thickness of the lower arc guiding piece is greater than the thickness of the upper arc guiding piece.

[0009] In still another specific embodiment of the utility model, the upper arc guiding piece and the lower arc guiding piece are fixedly connected after being manufactured respectively, the upper arc guiding piece is a metal plate bending piece, and the lower arc guiding piece is a block-shaped piece.

[0010] In still another specific embodiment of the utility model, the lower arc guiding piece comprises an arc guiding body, and the arc guiding body is annularly arranged on the outer edge of the mounting protrusion in a three-side surrounding manner.

[0011] In still another specific embodiment of the utility model, a mounting clamping edge is arranged on the inner side of the arc guiding body, and the clamping edge is abuttingly matched with the side of the mounting protrusion which is not surrounded by the arc guiding body.

[0012] In still another specific embodiment of the utility model, the upper arc guiding piece comprises a matching end, a fixed end and a connecting part, the matching end is arranged in parallel with and spaced apart from the grid sheet, the fixed end is matched and mounted with the lower arc guiding piece, and the connecting part connects the matching end and the fixed end.

[0013] In still another specific embodiment of the utility model, the fixed end and the connecting part are both strip-shaped, and the matching end is rectangular, and the width of the matching end is greater than the width of the fixed end and the connecting part.

[0014] In still another specific embodiment of the utility model, the gas generating piece comprises a first gas generating piece and a second gas generating piece, the second gas generating piece comprises an arc passage surface, and the mounting protrusion is arranged on the arc passage surface.

[0015] The utility model has the beneficial effects that: the dynamic arc guiding sheet comprises the upper arc guiding piece and the lower arc guiding piece, the thickness of the lower arc guiding piece is greater than the thickness of the upper arc guiding piece, the burning of the electric arc is coped with, the service life of the dynamic arc guiding sheet is improved, further, the split dynamic arc guiding sheet can improve the effect and reduce the manufacturing cost, and the competitiveness of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the contact and the arc extinguishing chamber of the utility model;

[0017] Figure 2 It is an explosion schematic view of the arc extinguishing chamber of the utility model;

[0018] Figure 3 It is a structural schematic view of the gas generating piece of the utility model;

[0019] Figure 4 It is lateral section view of arc extinguishing chamber of the utility model.

[0020] Figure 5 It is structure schematic view of lower arc leading piece of the utility model.

[0021] Figure 6 It is structure schematic view of upper arc leading piece of the utility model.

[0022] In the figure: 1. arc extinguishing chamber, 11. side wall, 12. grid, 13. arc extinguishing cover, 14. gas generating piece, 141. first gas generating piece, 142. second gas generating piece, 1421. electric arc passage surface, 1422. mounting protrusion, 15. ionization elimination assembly, 151. filter screen assembly, 152. insulating plate, 16. movable arc leading piece, 161. lower arc leading piece, 1611. arc leading body, 1612. mounting clamping edge, 1613. end surface, 16131. screw hole, 162. upper arc leading piece, 1621. cooperation end, 1622. fixed end, 16221. cooperation hole, 1623. connection part, 17. positioning piece; 2. movable contact; 3. static contact. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are 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 formal but not substantial changes according to the concept of the utility model should be regarded as the protection scope of the utility model.

[0024] In the following description, the directional or positional concepts of up, down, left, right, front and back are all based on the positions shown in the corresponding drawings, which are only provided for the technical solutions of the utility model and simplify the description, and thus cannot be understood as a special limitation on the technical solutions of the utility model.

[0025] As Figure 1 It is schematic view of switch. The switch includes arc extinguishing chamber 1 and contact system, the contact system includes movable contact 2 and static contact 3, the movable contact 2 oscillates to realize contact or separation with the static contact 3, and the current on the contact system is broken when the movable contact 2 changes from the state of contact with the static contact 3 to the state of separation. In the above process, electric arc is generated on the movable contact 2 and the static contact 3, and the electric arc is extinguished in the interior of the arc extinguishing chamber 1 after entering the arc extinguishing chamber 1.

[0026] As Figure 2Figure 1 is an exploded view of an arc extinguishing chamber. The arc extinguishing chamber 1 includes a pair of side walls 11 and a plurality of vanes 12 arranged between the pair of side walls 11. The vanes 12 are spaced apart from each other. When an arc enters the vanes 12, the arc voltage is increased, thereby extinguishing the arc.

[0027] The arc extinguishing chamber 1 further includes an arc extinguishing cover 13 at the top of the arc extinguishing chamber 1. The arc extinguishing cover 13 has a plurality of vent holes. The arc gas inside the arc extinguishing chamber 1 is filtered and discharged from the vent holes of the arc extinguishing cover 13 to the outside of the arc extinguishing chamber 1.

[0028] The arc extinguishing chamber 1 further includes a gas generating member 14. The gas generating member 14 includes a first gas generating member 141 and a second gas generating member 142. The vanes 12 include a pair of downwardly extending vane legs. The first gas generating member 141 is attached to the inner side of one of the vane legs, and the second gas generating member 142 is attached to the inner side of the other vane leg. The first gas generating member 141 and the second gas generating member 142 have a plurality of spaced apart arc passage surfaces.

[0029] The arc extinguishing chamber 1 further includes a deionization assembly 15. The deionization assembly 15 is located between the vanes 12 and the arc extinguishing cover 13. The arc gas is filtered by the deionization assembly 15 and discharged from the arc extinguishing cover 13 to the outside of the arc extinguishing chamber 1.

[0030] The deionization assembly 15 includes a filter screen assembly 151 and an insulating plate 152. The insulating plate 152 is located above the gas outlet of the vanes 12, and the filter screen assembly 151 is located above the insulating plate 152, and the insulating plate 152 and the filter screen assembly 151 are stacked.

[0031] The arc extinguishing chamber 1 further includes a movable arc guiding vane 16. The movable arc guiding vane 16 corresponds to one side of the movable contact 2. The movable arc guiding vane 16 is matched with the movable contact 2. Specifically, the movable arc guiding vane 16 pulls the arc on one side of the movable contact 2 into the arc extinguishing chamber 1.

[0032] Positioning members 17 are inserted into the vanes 12 from both sides of the vanes 12. The positioning members 17 help to strengthen the positioning of the vanes 12 spaced apart from each other, and prevent the arc gas from entering the vane leg portions of the vanes 12.

[0033] As shown in FIG. 1, the arc extinguishing chamber 1 includes a pair of side walls 11 and a plurality of vanes 12 arranged between the pair of side walls 11. The vanes 12 are spaced apart from each other. When an arc enters the vanes 12, the arc voltage is increased, thereby extinguishing the arc. Figure 3This is a schematic diagram of the second gas-generating component 142. The second gas-generating component 142 includes an arc channel surface 1421. The arc channel surface 1421 and another corresponding arc channel surface 1421 on the first gas-generating component 141 are spaced apart to form an arc channel. A mounting protrusion 1422 is provided within the arc channel for mounting the moving arc-initiating plate 16. Specifically, the mounting protrusion 1422 is disposed on the arc channel surface 1421.

[0034] like Figure 4 The side sectional view of the arc-extinguishing chamber shows that the moving arc-inducing plate 16 includes a lower arc-inducing component 161 and an upper arc-inducing component 162, which are fixedly connected. Specifically, the upper end of the upper arc-inducing component 162 is located outside the array of grid plates 12, and the lower end of the upper arc-inducing component 162 is used to connect with the upper end of the lower arc-inducing component 161. The lower end of the lower arc-inducing component 161 extends towards the contact system of the switch. More specifically, the lower arc-inducing component 161 is installed inside the arc channel and is sleeved on the mounting protrusion 1422. One end of the upper arc-inducing component 162 that mates with the grid plate 12 is engaged between a pair of sidewalls 1. Specifically, a retaining edge is provided on the sidewall 1, and the end of the upper arc-inducing component 162 that mates with the grid plate 12 is engaged with the retaining edge of the sidewall 1 and the inner wall of the sidewall 1.

[0035] In this embodiment, the lower arc-leading component 161 and the upper arc-leading component 162 are manufactured separately and then fixedly connected together. However, it is also feasible to manufacture the lower arc-leading component 161 and the upper arc-leading component 162 as a single unit. The technical problem in this invention is solved, and the corresponding technical effect is achieved because the current-carrying cross-sectional area of ​​the lower arc-leading component 161 is larger than that of the upper arc-leading component 162. The current-carrying cross-sectional area refers to the cross-sectional area of ​​the conductor perpendicular to the direction of current flow, thereby improving the electrical life of the moving arc-leading plate 16. There are generally two methods to make the current-carrying cross-sectional area of ​​the lower arc-leading component 161 larger than that of the upper arc-leading component 162. One method is that the thickness of the lower arc-leading component 161 is greater than the thickness of the upper arc-leading component 162; the other method is that the width of the lower arc-leading component 161 is greater than the width of the upper arc-leading component 162. Of course, both methods can also be combined.

[0036] like Figure 5 This is a schematic diagram of the lower arc guide 161. The lower arc guide 161 includes an arc guide body 1611, the shape of which matches the outer edge of the mounting protrusion 1422. When the lower arc guide 161 is installed in place, the arc guide body 1611 surrounds the outer edge of the mounting protrusion 1422 on three sides.

[0037] The inner side of the arc striking body 1611 is provided with a mounting clamping edge 1612, which is in abutting fit with the side of the mounting protrusion 1422 that is not surrounded by the arc striking body 1611, i.e. the side of the mounting protrusion 1422 that is in gap fit with the arc striking body 1611. Thus, reliable mounting and positioning between the lower arc striking member 161 and the mounting protrusion 1422 is achieved.

[0038] A screw hole 16131 is arranged on the end surface 1613 of the upper portion of the arc striking body 1611, which is used for cooperating with the upper arc striking member 162 for mounting.

[0039] In the embodiment, the lower arc striking member 161 is a block-shaped member, which is formed by casting or cutting. Compared with a metal bending member, the block-shaped member has a greater thickness, and thus the lower arc striking member 161 has a higher electric life after being burned by an electric arc.

[0040] As shown in FIG. 2, the upper arc striking member 162 is a metal plate bending member, which is usually formed by bending a metal plate. Of course, the upper arc striking member 162 and the lower arc striking member 161 usually also need to be processed by an electroplating process. Figure 6

[0041] The upper arc striking member 162 includes a cooperating end 1621, a fixed end 1622 and a connecting portion 1623. The cooperating end 1621 is parallel to and spaced apart from the grid sheet 12, i.e. the cooperating end 1621 is located outside one end of the array of the grid sheets 12 in the array direction. The fixed end 1622 is mounted in fit with the end surface 1613, and more specifically, the fixed end 1622 is provided with a cooperating hole 16221, and a screw is screwed into the screw hole 16131 through the cooperating hole 16221, so as to realize the fixed connection between the lower arc striking member 162 and the upper arc striking member 161.

[0042] The connecting portion 1623 connects the cooperating end 1621 and the fixed end 1622. In order to make the upper arc striking member 161 present an outward expansion to one side, the cooperating end 1621 and the fixed end 1622 are parallel, and the connecting portion 1623 is inclined. More preferably, the fixed end 1622 and the connecting portion 1623 are both strip-shaped, and the cooperating end 1621 is rectangular, i.e. the width of the cooperating end 1621 is greater than the width of the fixed end 1622 and the connecting portion 1623.

[0043] ​In the utility model, the lower arc guiding piece 161 has a larger current cross section area than the normal arc guiding piece, and the arc itself has a larger energy because the arc is in the initial stage at the lower arc guiding piece 161, the lower arc guiding piece 161 has a larger arc burning resistance effect, so that the lower arc guiding piece 161 has a higher service life, and the service life of the movable arc guiding piece 16 is improved.

[0044] For the specific embodiment, the structure of the split movable arc guiding piece 16 can improve the effect while reducing the manufacturing cost of the movable arc guiding piece 16. Since only the lower arc guiding piece 162 is a block-shaped piece with a larger thickness, and the upper arc guiding piece 161 still adopts a bent metal plate, the cost is undoubtedly saved compared with the case that the whole movable arc guiding piece 16 uses block-shaped pieces, and the competitiveness of the product is improved.

Claims

1. A switch arc chamber with a striking blade, comprising a pair of side walls (11), a grid (12) arrayed between the pair of side walls (11) and a moving striking blade (16) for guiding an electric arc into the arc chamber (1), characterized in that: The arc drawing piece (16) comprises a lower arc drawing piece (161) and an upper arc drawing piece (162), the upper end of the upper arc drawing piece (162) is located outside the array of the grid piece (12), the lower end of the upper arc drawing piece (162) is used for connecting with the upper end of the lower arc drawing piece (161), the lower end of the lower arc drawing piece (161) extends to the contact system of the switch, and the current carrying cross-sectional area of the lower arc drawing piece (161) is greater than that of the upper arc drawing piece (162).

2. A switch arc chamber having an arc striking piece according to claim 1, characterized in that: Further comprising a pair of gas generating pieces (14), the pair of gas generating pieces (14) are arranged at intervals and form an arc passage, the lower arc drawing piece (161) is located in the arc passage and has a mounting protrusion (1422) in the arc passage, and the lower arc drawing piece (161) is sleeved on the mounting protrusion (1422).

3. A switch arc chamber having an arc striking piece according to claim 1, characterized in that: The width of the lower arc drawing piece (161) is greater than that of the upper arc drawing piece (162).

4. A switch arc chamber having an arc striking plate according to claim 1, characterized in that: The thickness of the lower arc drawing piece (161) is greater than that of the upper arc drawing piece (162).

5. The switch arc chamber with an arc striking piece according to claim 1, characterized in that: The upper arc drawing piece (162) and the lower arc drawing piece (161) are fixedly connected after being manufactured respectively, the upper arc drawing piece (162) is a bent piece of a metal plate, and the lower arc drawing piece (161) is a block-shaped piece.

6. A switch arc chamber having an arc striking piece according to claim 2, characterized in that: The lower arc drawing piece (161) comprises an arc drawing body (1611), and the arc drawing body (1611) is annularly arranged on the outer edge of the mounting protrusion (1422) in a three-side surrounding manner.

7. A switch arc chamber having an arc striking plate according to claim 6, characterized in that: An installation clamping edge (1612) is arranged on the inner side of the arc drawing body (1611), and the installation clamping edge (1612) is abutted with the side of the mounting protrusion (1422) which is not surrounded by the arc drawing body (1611).

8. A switch arc chamber having an arc striking plate according to claim 5, characterized in that: The upper arc drawing piece (162) comprises a matching end (1621), a fixed end (1622) and a connecting part (1623), the matching end (1621) is parallel to and arranged at intervals with the grid piece (12), the fixed end (1622) is matched and installed with the lower arc drawing piece (161), and the connecting part (1623) connects the matching end (1621) and the fixed end (1622).

9. A switch arc chamber having an arc striking plate according to claim 8, characterized in that: The fixed end (1622) and the connecting part (1623) are in strip shapes, and the matching end (1621) is in a rectangular shape, and the width of the matching end (1621) is greater than that of the fixed end (1622) and the connecting part (1623).

10. A switch arc chamber having an arc striking plate according to claim 2, characterized in that: The gas generating piece (14) comprises a first gas generating piece (141) and a second gas generating piece (142), the second gas generating piece (142) comprises an arc passage surface (1421), and the mounting protrusion (1422) is arranged on the arc passage surface (1421).

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