CN107068426B - Clamp plate type power switch cabinet contact - Google Patents
Clamp plate type power switch cabinet contact Download PDFInfo
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- CN107068426B CN107068426B CN201710470129.2A CN201710470129A CN107068426B CN 107068426 B CN107068426 B CN 107068426B CN 201710470129 A CN201710470129 A CN 201710470129A CN 107068426 B CN107068426 B CN 107068426B
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- Prior art keywords
- contact
- clamping
- moving
- switch cabinet
- arm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
- H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
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Abstract
The invention discloses a clamping plate type power switch cabinet contact, which comprises an arm connecting seat, a plurality of moving contacts and a flexible joint, wherein each moving contact is connected with the arm connecting seat through the flexible joint; the clamping device comprises a moving contact and a clamping piece arranged on the moving contact, wherein the clamping piece is used for applying force for clamping the fixed contact to the moving contact. The contact can effectively increase the contact area between the moving contact and the fixed contact, so that the contact generates less heat in a conduction state, and accidents such as fire and explosion of the switch cabinet under the condition of overheating are avoided.
Description
Technical Field
The invention relates to the technical field of power contacts, in particular to a clamping plate type power switch cabinet contact.
Background
The high-voltage power switch cabinet is common equipment of a power system, controls the on and off of the power system, and is an important element of a power junction of a power station, a transformer substation, a power distribution room and the like.
The switch cabinet consists of a circuit breaker and a bus cabinet. The circuit breaker is movable and can be pushed and pulled out, the bus cabinet is provided with a fixed contact, and a movable contact on the circuit breaker is contacted with or separated from the fixed contact in the moving process of the circuit breaker, so that the aim of adjusting the system and the off state of the power system is fulfilled. The moving contact is the important part on the circuit breaker, and the moving contact that present cubical switchboard used is cage contact. The cage contact is formed by binding a plurality of conductive connecting sheets into a cage shape by binding springs, and two ends of the cage contact can be respectively sleeved on the conductive rods of the circuit breaker and the switch cabinet to bear current to pass through. However, the contact arm of cage contact and static contact and circuit breaker passes through the contact, and the electric current through the cubical switchboard is probably very big, and this just makes current cubical switchboard under the enclosed condition, very easily causes high temperature in the cabinet because of the generating heat of cage contact, leads to the material such as insulating sleeve adjacent with the cage contact to age fast, takes place accidents such as high-voltage breakdown, short circuit in the cabinet, then causes cubical switchboard burning, explosion, brews major accident.
Disclosure of Invention
The invention provides a clamp plate type power switch cabinet contact which can effectively increase the contact area of a moving contact and a fixed contact so as to reduce the heat generation quantity of the contact in a conduction state and avoid accidents such as fire and explosion and the like of a switch cabinet under the condition of overheating.
The clamp plate type power switch cabinet contact provided by the invention solves the problems through the following technical key points: the clamping plate type power switch cabinet contact comprises an arm connecting seat, a plurality of moving contacts and a flexible joint, wherein each moving contact is connected with the arm connecting seat through the flexible joint;
the clamping device comprises a moving contact and a clamping piece arranged on the moving contact, wherein the clamping piece is used for applying force for clamping the fixed contact to the moving contact.
Specifically, the flexible connector may be a flexible conductor, such as a plurality of copper wires, a conductor formed by stacking a plurality of copper sheets, a copper braided wire, or the like. The contact is used as a connecting piece between a fixed contact of the switch cabinet and a contact arm of the circuit breaker, when the circuit breaker is used, the arm connecting seat is fixedly connected with the contact arm, and the on-off state of a corresponding circuit is changed by switching the connection state of the movable contact and the fixed contact in the pushing and pulling processes of the circuit breaker.
In the prior art, the current passing through the switch cabinet is very large, and is hundreds of amperes less, thousands of amperes more or thousands of amperes more. Whereas a cage contact is generally composed of tens of conducting strips. Each conductive connecting sheet and the static contact are point contacts, the contact area is about one square millimeter, the current passing through the contact surface is generally more than 10 amperes and far exceeds the current-carrying density (about 10 amperes) of the body, and the structure of the cage-type contact is the root cause of great heat productivity at the contact.
In this scheme, through set up flexible joint between arm connecting seat and a plurality of moving contact, above flexible joint is at the regional in-process of static contact embedding centre gripping, accessible flexible deformation, guarantee on the moving contact the wall of straight section can be with present being straight rod-like stationary contact face contact or line contact, above flexible deformation is used for realizing the relative position transform of moving contact promptly. The upper hoop part is used for applying force for clamping the static contact to the moving contact so as to ensure the reliability of the upper surface contact or the line contact.
The further technical scheme is as follows:
the arm connecting seat comprises a plurality of clamping pieces, each clamping piece is connected with a moving contact through a flexible joint, and the arm connecting seat further comprises a connecting bolt, and the connecting bolt is used for realizing the bolt connection between the clamping pieces and the contact arms. Specifically, in this structure, set up the arm connecting seat into split type structure in other words, above multi-disc clamping piece also can utilize the flexibility of flexible joint, convenient realization and the face contact of contact arm. Because this contact installation back, the arm connecting seat keeps connected state with the contact arm all the time, so connecting bolt realizes being connected of clamping piece and contact arm more than adopting, compares in the traditional connected mode that adopts cage contact, and not only connection reliability is higher, has bigger area of contact simultaneously.
The number of the clamping pieces, the moving contacts and the flexible joints is equal, and each clamping piece is connected with one of the moving contacts through one of the flexible joints. In the scheme, if the number is N, N clamping pieces, N moving contacts and N flexible joints can form N groups of connecting bodies, each connecting body comprises one clamping piece, one moving contact and one flexible joint, and the connecting bodies are mutually independent, so that the connecting bodies have good interchangeability; meanwhile, the connecting bodies are relatively independent, so that the arm connecting seat can adapt to contact arms of different models.
As an implementation mode convenient to realize, the number of the clamping pieces and the moving contact is two, and the device further comprises a cushion block, wherein when the contact arm is clamped between the two clamping pieces, the cushion block is clamped between the two clamping pieces. In this scheme, because adopt bolted connection between clamping piece and the contact arm, for avoiding because the contact arm is too short, especially connecting bolt is to wearing two clamping pieces, is about to the contact arm to pass through when connecting bolt centre gripping is between two clamping pieces, it is not high to cause the reliability that clamping piece and contact arm are connected, sets up above-mentioned cushion, and above cushion provides the support for the clamping piece through the looks remote site that corresponds, reaches the purpose of restraint relative position between the clamping piece.
As a clamping piece implementation mode capable of automatically providing clamping static contact force for the moving contact through elastic resilience, the clamping piece is an annular spiral spring, the number of the clamping pieces is at least two, and the clamping pieces are all clamped on the straight section of the moving contact. The above annular helical spring is formed by winding a traditional straight helical spring into a ring, the moving contact penetrates through the inner side of the ring, the ring is positioned in the circumferential direction of the static contact clamping area, and the ring is in contact with each moving contact. The limitation of the position of the clamping piece on the moving contact can avoid the situation that the single moving contact tilts relative to the fixed contact to influence the surface adhesion of the moving contact and the fixed contact.
As a concrete implementation mode of the moving contacts, one end of each moving contact is connected with the arm connecting seat through a flexible joint, a bent flap is further arranged at the free end of each moving contact, a straight section on each moving contact is located between the bent flap and the flexible joint, and the bent flaps on each moving contact jointly form a horn-shaped static contact leading-in port. In the scheme, because the contact and the static contact move relatively during working, under the action of flexibility, assembly error, thermal deformation and the like of the flexible joint, a clamping area formed by the straight sections is easily deviated from the static contact, and the static contact is conveniently guided into the clamping area formed by the straight sections through the bell-mouth-shaped guide-in openings.
The invention has the following beneficial effects:
in this scheme, through set up flexible joint between arm connecting seat and a plurality of moving contact, above flexible joint is at the regional in-process of static contact embedding centre gripping, accessible flexible deformation, guarantee on the moving contact the wall of straight section can be with present being straight rod-like stationary contact face contact or line contact, above flexible deformation is used for realizing the relative position transform of moving contact promptly. The upper hoop part is used for applying force for clamping the static contact to the moving contact so as to ensure the reliability of the upper surface contact or the line contact.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a clamp plate type power switch cabinet contact according to the present invention.
The reference numbers in the figures are in order: 1. static contact, 2, cramp spare, 3, moving contact, 31, straight section, 4, flexible joint, 5, cushion, 6, contact arm, 7, arm connecting seat, 71, clamping piece, 8, connecting bolt.
Detailed Description
The present invention will be described in further detail with reference to examples, but the structure of the present invention is not limited to the following examples.
Example 1:
as shown in fig. 1, the clamp plate type power switch cabinet contact comprises an arm connecting seat 7, a plurality of moving contacts 3 and a flexible joint 4, wherein each moving contact 3 is connected with the arm connecting seat 7 through the flexible joint 4, a straight section 31 is arranged on each moving contact 3, and the straight sections 31 of the moving contacts 3 jointly enclose a clamping area of a static contact 1;
the clamping device further comprises a clamping piece 2 arranged on the movable contact 3, wherein the clamping piece 2 is used for applying a force for clamping the fixed contact 1 to the movable contact 3.
In this embodiment, the moving contact 3 of the contact is used for clamping the existing static contact 1 with a circular cross section, so that in order to avoid that a single moving contact 3 is only in wired contact with the static contact 1, the clamping surfaces of the straight sections 31 are all arc surfaces with radian consistent with the surface of the static contact 1, and thus, the moving contacts 3 can be ensured to be in surface contact with the static contact 1.
Example 2:
as shown in fig. 1, the clamp plate type power switch cabinet contact comprises an arm connecting seat 7, a plurality of moving contacts 3 and a flexible joint 4, wherein each moving contact 3 is connected with the arm connecting seat 7 through the flexible joint 4, a straight section 31 is arranged on each moving contact 3, and the straight sections 31 of the moving contacts 3 jointly enclose a clamping area of a static contact 1;
the clamping device further comprises a clamping piece 2 arranged on the movable contact 3, wherein the clamping piece 2 is used for applying a force for clamping the fixed contact 1 to the movable contact 3.
In this embodiment, in order to facilitate the manufacture of the movable contact 3, the clamping surface of the movable contact 3 is set to be a plane, so that the structure of the static contact 1 matched with the movable contact 3 also needs to be improved to a certain extent, and the side surface of the static contact 1 is set to be composed of a plurality of planes, and the angle and the position of each movable contact 3 are ensured to be attached to the corresponding surface of the static contact 1 under the constraint of the flexible joint 4 when the tightening member 2 applies a tightening force.
Example 3:
as shown in fig. 1, the present embodiment is further defined on the basis of embodiment 1: the arm connecting base 7 comprises a plurality of clamping pieces 71, each clamping piece 71 is connected with the moving contact 3 through a flexible joint 4, and the arm connecting base further comprises a connecting bolt 8, and the connecting bolt 8 is used for realizing the bolt connection between the clamping pieces 71 and the contact arm 6. In this embodiment, each clip 71 can be directly bolted to the contact arm 6 through the connecting bolt 8, that is, a through hole that is in clearance fit with the connecting bolt 8 is provided on each clip 71, and an internal threaded hole is provided on the contact arm 6; each clip 71 can also be connected with the contact arm 6 through the connecting bolt 8 which is a through bolt, if the contact arm 6 is provided with a through hole which is in clearance fit with the connecting bolt 8, the clips 71 are opposite to each other in the circumferential direction of the contact arm 6, and the clips 71 are also provided with a through hole which is in clearance fit with the connecting bolt 8, the connecting bolt 8 clamps the opposite clips 71, so that the purpose of fixing the corresponding clips 71 and the contact arm 6 is achieved; as a person skilled in the art, in the two opposite clip pieces 71, one of the clip pieces 71 may be provided with an internal threaded hole, and the contact arm 6 and the other clip piece 71 may be provided with through holes in clearance fit with the connecting bolt 8, so as to fix the corresponding clip piece 71 on the outer side of the contact arm 6, in which case the connecting bolt 8 also penetrates through the contact arm 6.
The number of the clamping pieces 71, the moving contacts 3 and the flexible joints 4 is equal, and each clamping piece 71 is connected with one moving contact 3 through one flexible joint 4.
As a convenient implementation manner, the number of the clamping pieces 71 and the number of the movable contacts 3 are two, and the movable contact further includes a cushion block 5, and when the contact arm 6 is clamped between the two clamping pieces 71, the cushion block 5 is clamped between the two clamping pieces 71. As a person skilled in the art, the existing contact arm 6 is also mostly in the shape of a rod with a circular cross section, so that in order to make the arm connecting seat 7 and the contact arm 6 capable of surface-fitting, when the arm connecting seat 7 in this embodiment is applied to the existing cylindrical contact arm 6, the clamping surfaces of the clamping pieces 71 are arc surfaces consistent with the surface radian of the contact arm 6; the holding surface of each clip 71 in this embodiment may be a flat surface, so that the side surface of the contact arm 6 is modified to a corresponding flat surface.
Example 4:
as shown in fig. 1, as an implementation manner of a tightening member 2 capable of automatically providing a force for clamping a stationary contact 1 to a movable contact 3 through elastic resilience, the tightening member 2 is an annular spiral spring, the number of the tightening members 2 is at least two, and the tightening members 2 are all tightened on a straight section 31 of the movable contact 3. In this embodiment, there are two tightening members 2, and the two tightening members 2 are respectively disposed at different ends of the straight section 31.
One end of each moving contact 3 is connected with the arm connecting seat 7 through a flexible joint 4, a bent flap is further arranged on the free end of each moving contact 3, the straight section 31 on each moving contact 3 is positioned between the bent flap and the flexible joint 4, and the bent flaps on each moving contact 3 jointly enclose a horn-shaped static contact 1 leading-in port.
In this embodiment, for convenience of processing, the side surface of the static contact 1 matched with the contact is formed by surrounding a plurality of planes, so that the moving contacts 3 are formed by bending straight bars with rectangular sections, the bending aims to form bending wings on each moving contact 3 to facilitate the leading-in of the static contact 1, and any one plane on each moving contact 3 is used as a clamping surface of the straight section 31.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.
Claims (4)
1. The clamp plate type power switch cabinet contact comprises an arm connecting seat (7) and a plurality of movable contacts (3), and is characterized by further comprising flexible joints (4), wherein each movable contact (3) is connected with the arm connecting seat (7) through the flexible joint (4), each movable contact (3) is provided with a straight section (31), and the straight sections (31) of the movable contacts (3) jointly enclose a clamping area of a static contact (1);
the clamping device is characterized by further comprising a clamping piece (2) arranged on the moving contact (3), wherein the clamping piece (2) is used for applying force for clamping the static contact (1) to the moving contact (3); the arm connecting seat (7) comprises a plurality of clamping pieces (71), each clamping piece (71) is connected with the moving contact (3) through a flexible joint (4), and the arm connecting seat further comprises a connecting bolt (8), and the connecting bolt (8) is used for realizing the bolt connection between the clamping pieces (71) and the contact arm (6); the number of the clamping pieces (71), the number of the moving contacts (3) and the number of the flexible joints (4) are equal, each clamping piece (71) is connected with one moving contact (3) through one flexible joint (4), and the flexible joints (4) are arranged between the clamping pieces (71) and the moving contacts (3); the flexible joint (4) can be flexibly deformed in the process that the static contact (1) is embedded into the clamping area, so that the wall surface of the straight section (31) on the moving contact (3) can be in surface contact or line contact with the existing straight rod-shaped static contact (1).
2. The clamp plate type power switch cabinet contact according to claim 1, wherein the number of the clamping pieces (71) and the movable contact (3) is two, and the clamp plate type power switch cabinet contact further comprises a cushion block (5), and when the contact arm (6) is clamped between the two clamping pieces (71), the cushion block (5) is clamped between the two clamping pieces (71).
3. The clamp plate type power switch cabinet contact according to claim 1, wherein the clamping members (2) are annular coil springs, and the number of the clamping members (2) is at least two, and the clamping members (2) are respectively clamped on the straight sections (31) of the movable contact (3).
4. The clamp plate type power switch cabinet contact as claimed in claim 1, wherein one end of each moving contact (3) is connected with the arm connecting seat (7) through a flexible joint (4), a bent flap is further arranged on the free end of each moving contact (3), the straight section (31) on each moving contact (3) is located between the bent flap and the flexible joint (4), and the bent flaps on each moving contact (3) jointly enclose a horn-shaped static contact (1) leading-in port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710470129.2A CN107068426B (en) | 2017-06-20 | 2017-06-20 | Clamp plate type power switch cabinet contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710470129.2A CN107068426B (en) | 2017-06-20 | 2017-06-20 | Clamp plate type power switch cabinet contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107068426A CN107068426A (en) | 2017-08-18 |
| CN107068426B true CN107068426B (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710470129.2A Active CN107068426B (en) | 2017-06-20 | 2017-06-20 | Clamp plate type power switch cabinet contact |
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| Country | Link |
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| CN (1) | CN107068426B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2796065Y (en) * | 2005-04-08 | 2006-07-12 | 仪征市电瓷电器有限责任公司 | Finger touching type isolation switch |
| CN105895393A (en) * | 2015-07-20 | 2016-08-24 | 王静 | Isolation switch accessory capable of tensioning relative to contact finger and preventing electrical conduction |
| CN206789439U (en) * | 2017-06-20 | 2017-12-22 | 王丽萍 | Clamping plate type power switch cabinet contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4172615B2 (en) * | 2001-05-28 | 2008-10-29 | 東光電気株式会社 | Switching contacts and switches |
-
2017
- 2017-06-20 CN CN201710470129.2A patent/CN107068426B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2796065Y (en) * | 2005-04-08 | 2006-07-12 | 仪征市电瓷电器有限责任公司 | Finger touching type isolation switch |
| CN105895393A (en) * | 2015-07-20 | 2016-08-24 | 王静 | Isolation switch accessory capable of tensioning relative to contact finger and preventing electrical conduction |
| CN206789439U (en) * | 2017-06-20 | 2017-12-22 | 王丽萍 | Clamping plate type power switch cabinet contact |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107068426A (en) | 2017-08-18 |
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