CN114360956A - Rotating switch moving contact component for physically isolating electric arc - Google Patents
Rotating switch moving contact component for physically isolating electric arc Download PDFInfo
- Publication number
- CN114360956A CN114360956A CN202210094220.XA CN202210094220A CN114360956A CN 114360956 A CN114360956 A CN 114360956A CN 202210094220 A CN202210094220 A CN 202210094220A CN 114360956 A CN114360956 A CN 114360956A
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- CN
- China
- Prior art keywords
- contact
- insulating
- chucks
- moving contact
- movable contact
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/32—Insulating body insertable between contacts
Abstract
The invention belongs to the technical field of rotary switches, and particularly relates to a movable contact component of a rotary switch for physically isolating electric arcs, which comprises a movable contact rotating frame and a movable contact, wherein the movable contact is arranged on the movable contact rotating frame and is in linkage fit with the movable contact rotating frame; the two oppositely arranged insulating chucks have a first state of separating to form a gap between the two for the static contact to rotate and a second state of combining to cut off the disjunctive electric arc. The invention innovatively provides a physical arc-isolating mode for isolating an arc between a moving contact and a static contact through an insulating chuck in a rotary switch, and compared with the existing arc-extinguishing mode, the arc-extinguishing effect is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of rotary switches, and particularly relates to a movable contact assembly of a rotary switch for physically isolating electric arcs.
Background
The rotary isolating switch in the prior art is generally formed by stacking a plurality of switch units, each switch unit comprises a shell, a moving contact, a static contact and a moving contact rotating frame, the moving contact is mounted on the moving contact rotating frame, the moving contact rotating frame is rotatably arranged on the shell, the static contact is fixed on the shell and is positioned on a rotating track of the moving contact, and the moving contact and the static contact are switched on or switched off when the moving contact rotating frame rotates to form the on-off of a circuit.
Arcing is a gas discharge phenomenon, a transient spark generated by the passage of current through some insulating medium (e.g., air). When the switch contacts are separated, the distance between the contacts is very small, and the electric field intensity E is very high, so that electric arcs can be generated when the moving contact and the static contact are disconnected. The electric arc not only can damage the contact greatly, but also can prolong the time for breaking the circuit, and the high temperature formed by the electric arc can burn the contact and the insulation, even cause the interphase short circuit and the explosion of the electric appliance under serious conditions, thereby causing fire and endangering the safety of personnel and equipment. Therefore, providing an arc extinguishing mechanism in the disconnector is an important setting for ensuring safety in use.
In the field of switching technology, conventional arc extinguishing methods are currently: an elongated electric arc, a metal grid arc extinguishing chamber, a gas blast arc extinguishing device, a folding vacuum arc extinguishing device and the like. At present, an arc extinguishing chamber is arranged in a conventional arc extinguishing mode in a rotary isolating switch, but the arc extinguishing effect is poor. The applicant previously applied a plurality of arc extinguishing structures related to a rotary isolating switch, wherein the structures include a permanent magnet arranged as disclosed in patent 201820047807.4, and arc extinguishing is performed by using a magnetic field formed by the permanent magnet to perform arc extinguishing, and the arc extinguishing effect is limited due to the limitation of the arrangement position of the permanent magnet; patent cn202020221756.x utilizes the arc extinguishing chamber and permanent magnet to introduce the arc into the arc extinguishing chamber, compared with patent 201820047807.4, the arc extinguishing effect is obviously improved, but the structure is complex.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a rotary switch movable contact assembly for physically cutting off an electric arc.
The technical scheme adopted by the invention is as follows: a movable contact assembly of a rotary switch for physically isolating electric arc comprises a movable contact rotating frame and a movable contact, wherein the movable contact is arranged on the movable contact rotating frame and is in linkage fit with the movable contact rotating frame; and at least one group of insulating chucks are positioned in the moving area, and the two oppositely arranged insulating chucks have a first state of separating to form a gap between the two insulating chucks for the static contact to rotate and a second state of combining to cut off the disjunctive electric arc.
The physical partition structure is at least partially provided with elasticity to enable the two oppositely arranged insulating chucks to be separated when the static contact rotates and reset to a matched state under the action of the elasticity of the physical partition structure, and the insulating chucks are provided with action guide surfaces used for interacting with the static contact to enable the two oppositely arranged insulating chucks to be separated.
The physical partition structure comprises a spring plate main body, the spring plate main body is provided with a first elastic action part, and the insulating chuck is fixed on the first elastic action part.
The insulating chuck is directly formed by integrally injection molding insulating materials outside the first elastic action part.
The physical partition structure comprises two elastic sheet main bodies which are respectively positioned on two sides of the moving contact and are in linkage fit with the moving contact rotating frame, and two insulating chucks which are a group of insulating chucks are respectively arranged on the two elastic sheet main bodies.
The moving contact comprises at least one group of moving contact pieces arranged in pairs, and a fit clearance for inserting the fixed contact is formed between the group of moving contact pieces arranged in pairs; the two elastic sheet main bodies respectively positioned at two sides of the moving contact are respectively provided with a second elastic action part for forming elastic force on the moving contact, and the group of moving contacts arranged in pairs has a closed state which is opened by the static contact and an open state which is elastically reset after being separated from the static contact.
The insulating chucks are arranged adjacent to the movable contact pieces, so that when one group of the movable contact pieces arranged in pairs is in a closed state propped open by the fixed contact, the two opposite insulating chucks are in a first state that the two insulating chucks are separated to form a gap for the fixed contact to rotate.
The movable contact is formed by connecting two contact pieces which are overlapped up and down and then riveted, the contact pieces are provided with at least one movable contact piece, at least one group of movable contact pieces which are arranged in pairs is formed by overlapping the two contact pieces up and down, and a fit clearance for inserting the fixed contact is formed between the group of movable contact pieces which are arranged in pairs.
The two contact pieces forming the moving contact are connected through a connecting piece, and a riveting piece for riveting the other contact piece is arranged on the periphery of one contact piece or the two contact pieces; the two contact pieces, the connecting piece and the riveting piece are integrally formed, and the moving contact is formed by connecting the two contact pieces in a riveting manner after being folded at the connecting piece and then overlapped up and down.
The insulating chuck is arranged adjacent to the movable contact piece.
The invention has the following beneficial effects: the invention discloses a rotary switch, which is characterized in that an electric arc is formed between a moving contact and a static contact along with the rotation of the moving contact when the moving contact and the static contact are disconnected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a schematic diagram of the structure of the moving contact assembly in one embodiment of the present invention;
FIG. 2 is an exploded view of the moving contact assembly in one embodiment of the present invention;
fig. 3 is a schematic structural view of a spring main body according to an embodiment of the present invention;
FIG. 4 is a schematic view of an insulating chuck according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a movable contact according to an embodiment of the present invention;
fig. 6 is a schematic view of an expanded structure of the movable contact according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a position of the movable contact assembly and the fixed contact in a disconnected state according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a position of a moving contact assembly and a stationary contact in a close-to-closed state according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a position of the movable contact assembly and the fixed contact in a closed state according to an embodiment of the present invention, in which the movable contact structure is hidden;
in the figure, 1, a moving contact rotating frame; 101, a moving area; 102, a linkage post; 2, a moving contact; 201, a movable contact spring; 202, connecting pieces; 203, riveting sheets; 3, insulating a chuck; 301, a jack; 302, acting on a guide surface; 4, a spring plate main body; 401, a first spring action portion; 402, a second spring action portion; 5, static contact; 6, a shell cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, which are not described in any more detail in the following embodiments.
The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.
The invention provides a rotary switch moving contact component for physically isolating electric arc, which comprises a moving contact rotating frame 1, a moving contact 2 and a shell cover 6, wherein the moving contact 2 is arranged on the moving contact rotating frame 1 and is in linkage fit with the moving contact rotating frame 1, a square linkage column 102 is arranged on the moving contact rotating frame 1, and the moving contact 2 is sleeved outside the linkage column 102 and rotates along with the rotation of the moving contact rotating frame 1. The moving contact rotating frame 1 is provided with a moving area 101 for the static contact 5 to rotate between a closed state and an open state relative to the moving contact, in the rotary isolating switch, the moving contact component rotates, the static contact does not move, and in the rotating process of the moving contact component, the position of the static contact relative to the moving contact changes.
The moving contact rotating frame 1 is provided with a physical partition structure for cutting off electric arcs, the physical partition structure comprises at least one group of insulating chucks 3, and the group of insulating chucks 3 consists of two insulating chucks 3 which are arranged oppositely and at least partially insulated; and at least one group of insulating chucks 3 are positioned in the moving area 101, and the two oppositely arranged insulating chucks 3 have a first state of separating to form a gap between the two for the static contact 5 to rotate and a second state of combining to cut off the disjunctive electric arc.
Further, at least part of the physical partition structure has elasticity, so that the two oppositely arranged insulating chucks 3 are separated when the static contact 5 rotates and reset to a matched state under the action of the elasticity of the physical partition structure, and an action guide surface 302 used for interacting with the static contact 5 to separate the two oppositely arranged insulating chucks 3 is arranged on the insulating chuck 3. When the static contact 5 rotates and passes through, the static contact 5 overcomes the elastic action of the physical partition structure to squeeze apart to separate the two insulating chucks 3, and after the static contact 5 rotates and passes through, the static contact resets to a matched state under the self elastic action to directly partition the electric arc between the static contact 5 and the moving contact. In this embodiment, the acting guide surface 302 is a smooth convex curved surface as shown in the figure, and may also be a guide inclined surface or other structures capable of interacting with the stationary contact to separate the two oppositely arranged insulating chucks 3.
Further, the physical partition structure includes a spring main body 4, as shown in fig. 3, the spring main body 4 is provided with a first elastic acting portion 401, and the insulating chuck 3 is fixed on the first elastic acting portion 401.
As shown in fig. 4, the insulating clip 3 is formed by directly molding the insulating material outside the first elastic action portion 401. The elastic sheet main body 4 is preferably a metal elastic sheet, and the service life is long.
The physical partition structure comprises two elastic sheet main bodies 4 which are respectively positioned at two sides of the moving contact 2 and are in linkage fit with the moving contact rotating frame 1, and two insulating chucks 3 which are a group of insulating chucks 3 are respectively arranged on the two elastic sheet main bodies 4. In this embodiment, the moving contact rotating frame 1 has a central linkage shaft, and one elastic sheet main body 4, the moving contact 2, and the other elastic sheet main body 4 are sequentially sleeved outside the central linkage shaft, so that the assembly is convenient.
As shown in fig. 5, the movable contact 2 includes at least one set of movable contacts 201 arranged in pairs, and a matching gap for inserting the stationary contact 5 is formed between the set of movable contacts 201 arranged in pairs. In some embodiments of the present invention, the two elastic sheet main bodies 4 respectively located at two sides of the movable contact 2 are respectively provided with a second elastic acting portion 402 for forming an elastic force on the movable contact 201, and the group of the movable contacts 201 arranged in pair has a closed state of being propped by the fixed contact 5 and an open state of being elastically reset after being separated from the fixed contact 5, that is, the movable contact 201 and the fixed contact 5 are kept jointed when being closed by the pressure of the second elastic acting portion 402 of the elastic sheet main body 4 pressing the movable contact 201. In addition, the moving contact 2 itself may have some elasticity or may not have the elasticity completely depending on the function of the spring main body 4.
Further, as shown in fig. 3, the first elastic acting portion 401 is disposed close to the second elastic acting portion 402, so that the insulating cartridges 3 are disposed adjacent to the movable contact pieces 201, and when a group of the movable contact pieces 201 disposed in pair is in a closed state being separated by the fixed contact 5, the two insulating cartridges 3 disposed opposite to each other are in a first state of being separated to form a gap between the two insulating cartridges for the fixed contact 5 to rotate. Namely, when the static contact 5 and the moving contact are released from closing, the two oppositely arranged insulating chucks 3 are in a phase separation state, and after the static contact 5 is disconnected, the static contact 5 is directly rotated out along a gap between the two oppositely arranged insulating chucks 3, so that obvious resistance can not be formed on the rotation of the moving contact component in the breaking process.
As shown in fig. 5, the movable contact 2 is formed by two contacts being overlapped up and down and then riveted together, the contacts have at least one movable contact 201, and the two contacts are overlapped up and down to form at least one group of movable contacts 201 arranged in pairs, and a matching gap for inserting the fixed contact 5 is formed between the group of movable contacts 201 arranged in pairs.
As shown in fig. 6, two contact pieces constituting the movable contact 2 are connected by a connecting piece 202, wherein a riveting piece 203 for riveting the other contact piece is arranged on the upper periphery of one contact piece or the two contact pieces; the moving contact 2 is formed by bending two contact pieces at the connecting sheet 202, then overlapping the two contact pieces up and down and riveting the two contact pieces.
In this embodiment, the insulating cartridge 3 is disposed adjacent to the movable contact 201. The insulating chuck 3 and the moving contact 201 can be separated by a certain distance, and in practical tests, the shorter the distance between the insulating chuck 3 and the moving contact 201 is, the better the arc extinguishing effect is.
The action process of the embodiment in cooperation with the fixed contact 5 is as follows: as shown in fig. 7, in the disconnected state, the movable contact 2 and the fixed contact 5 are separated by a certain distance, the insulating chuck 3 is located between the movable contact 2 and the fixed contact 5, the insulating chuck 3 is engaged under the elastic sheet body 4, the movable contact assembly is rotated to move the movable contact 2 toward the fixed contact 5, after the fixed contact 5 is moved to contact the insulating chuck 3, the fixed contact 5 interacts with the action guide surface 302, so that the two oppositely arranged insulating chucks 3 are separated, as shown in fig. 8, the movable contact assembly continues to move to the position shown in fig. 9, enters the fit gap of the movable contact 201, and is connected with the movable contact to form the closed state.
From closing to opening, the moving contact component moves in the opposite direction, after moving to leave the insulating chuck 3, the insulating chuck 3 resets to the same position shown in fig. 7 under the elastic resetting action of the elastic sheet main body 4, and the electric arc between the moving contact and the static contact is cut off, so that the arc extinguishing purpose is achieved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. The utility model provides a physics cuts off rotary switch moving contact subassembly of electric arc, includes moving contact rolling stock (1), set up on moving contact rolling stock (1) and with moving contact rolling stock (1) linkage complex moving contact (2), be equipped with on moving contact rolling stock (1) and be used for supplying static contact (5) to move moving contact pivoted removal district (101) between closed-off state, its characterized in that relatively: the moving contact rotating frame (1) is provided with a physical partition structure for cutting off electric arcs, the physical partition structure comprises at least one group of insulating chucks (3), and the group of insulating chucks (3) consists of two insulating chucks (3) which are arranged oppositely and at least partially insulated; and at least one group of insulating chucks (3) is positioned in the moving area (101), and the two oppositely arranged insulating chucks (3) have a first state of separating to form a gap between the two for the static contact (5) to rotate and a second state of combining to cut off the disjunctive electric arc.
2. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 1, wherein: the physical partition structure is at least partially provided with elasticity, so that the two oppositely arranged insulating chucks (3) are separated when the static contact (5) rotates and reset to a matched state under the action of the elasticity of the insulating chucks, and action guide surfaces (302) used for interacting with the static contact (5) to separate the two oppositely arranged insulating chucks (3) are arranged on the insulating chucks (3).
3. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 2, wherein: the physical partition structure comprises an elastic sheet main body (4), the elastic sheet main body (4) is provided with a first elastic action part (401), and the insulating chuck (3) is fixed on the first elastic action part (401).
4. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 3, wherein: the insulating chuck (3) is directly formed by integrally injection molding insulating materials outside the first elastic action part (401).
5. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 3, wherein: the physical partition structure comprises two elastic sheet main bodies (4) which are respectively positioned at two sides of the moving contact (2) and are in linkage fit with the moving contact rotating frame (1), and two insulating chucks (3) which are a group of insulating chucks (3) are respectively arranged on the two elastic sheet main bodies (4).
6. A rotary switch movable contact assembly for physically interrupting an arc as claimed in claim 5, wherein: the moving contact (2) comprises at least one group of moving contact pieces (201) which are arranged in pairs, and a matching gap for inserting the fixed contact (5) is formed between the group of moving contact pieces (201) which are arranged in pairs; the two elastic sheet main bodies (4) respectively positioned at two sides of the moving contact (2) are respectively provided with a second elastic action part (402) for forming elastic force on the moving contact sheet (201), and the group of moving contact sheets (201) arranged in pairs has a closed state which is opened by the static contact (5) and an open state which is elastically reset after being separated from the static contact (5).
7. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 6, wherein: the insulating chucks (3) and the movable contacts (201) are arranged adjacently, so that when a group of the movable contacts (201) arranged in pairs are in a closed state which is opened by the fixed contact (5), the two opposite insulating chucks (3) are in a first state which is separated to form a gap for the fixed contact (5) to rotate between the two insulating chucks.
8. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 6, wherein: the movable contact (2) is formed by connecting two contact pieces which are overlapped up and down and then riveted, the contact pieces are provided with at least one movable contact piece (201), at least one group of movable contact pieces (201) which are arranged in pairs is formed by overlapping the two contact pieces up and down, and a fit clearance for inserting the static contact (5) is formed between the group of movable contact pieces (201) which are arranged in pairs.
9. A rotary switch movable contact assembly for physically interrupting an arc as recited in claim 8, wherein: two contact pieces forming the movable contact (2) are connected through a connecting piece (202), and a riveting piece (203) for riveting the other contact piece is arranged on the periphery of one or two contact pieces; the two contact pieces, the connecting piece (202) and the riveting piece (203) are integrally formed, and the moving contact (2) is formed by connecting the two contact pieces which are folded up and down at the connecting piece (202) and then riveted.
10. A rotary switch movable contact assembly for physically interrupting an arc as claimed in any one of claims 1 to 6 and 8 to 9 wherein: the insulating chuck (3) is arranged adjacent to the movable contact piece (201).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094220.XA CN114360956A (en) | 2022-01-26 | 2022-01-26 | Rotating switch moving contact component for physically isolating electric arc |
| PCT/CN2022/076603 WO2023142184A1 (en) | 2022-01-26 | 2022-02-17 | Rotary switch moving contact assembly for physically interrupting electric arc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094220.XA CN114360956A (en) | 2022-01-26 | 2022-01-26 | Rotating switch moving contact component for physically isolating electric arc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114360956A true CN114360956A (en) | 2022-04-15 |
Family
ID=81093876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210094220.XA Pending CN114360956A (en) | 2022-01-26 | 2022-01-26 | Rotating switch moving contact component for physically isolating electric arc |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114360956A (en) |
| WO (1) | WO2023142184A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024002368A1 (en) * | 2022-06-30 | 2024-01-04 | 上海良信电器股份有限公司 | Moving contact structure, switch unit, isolation switch, and power supply system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832062B (en) * | 2012-08-28 | 2015-02-04 | 北京人民电器厂有限公司 | Electrical appliance device with arc separating member |
| DE102014116400A1 (en) * | 2014-11-11 | 2016-05-12 | Eaton Electrical Ip Gmbh & Co. Kg | Rotary contact device for a switch |
| CN108987140B (en) * | 2017-06-01 | 2024-04-02 | 泰科电子(深圳)有限公司 | Electrical contact system |
| CN206806206U (en) * | 2017-06-02 | 2017-12-26 | 浙江麦格电气有限公司 | Arc extinguishing system of circuit breaker |
| CN211828540U (en) * | 2019-12-30 | 2020-10-30 | 浙江正泰电器股份有限公司 | Rotary type air-blast arc-extinguishing device |
| CN213400978U (en) * | 2020-10-23 | 2021-06-08 | 上海良信电器股份有限公司 | Contact support, switch unit and rotary switch |
| CN216749679U (en) * | 2022-01-26 | 2022-06-14 | 浙江奔一电气有限公司 | Rotating switch moving contact component for physically isolating electric arc |
-
2022
- 2022-01-26 CN CN202210094220.XA patent/CN114360956A/en active Pending
- 2022-02-17 WO PCT/CN2022/076603 patent/WO2023142184A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024002368A1 (en) * | 2022-06-30 | 2024-01-04 | 上海良信电器股份有限公司 | Moving contact structure, switch unit, isolation switch, and power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023142184A1 (en) | 2023-08-03 |
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