Isolating switch structure

Abstract

The utility model discloses an isolating switch structure, which comprises a switch body, a static contact fixedly arranged in the switch body and a moving contact movably arranged in the switch body, and the static contact is provided with a static arc contact and a static main contact arranged around the static arc contact. The moving contact is provided with a moving arcing contact and a moving main contact arranged around the moving arcing contact, the moving arcing contact is movably contacted with the static arcing contact, and the moving main contact is movably contacted with the static main contact; the middle part of the static arc contact is matched with a static permanent magnet, the middle part of the movable arc contact is matched with a movable movable permanent magnet and a reset spring for driving the movable permanent magnet to move towards the static permanent magnet, the movable permanent magnet and the static permanent magnet are opposite and are arranged in a magnetic attraction manner, and the static arc contact movably pushes the movable permanent magnet. According to the utility model, the electric arc can be rapidly extinguished during opening, which is helpful for protecting each component.

Description

Technical Field

[0001] The utility model relates to the field of high-voltage switch equipment, in particular to an isolating switch structure. Background Art

[0002] Existing disconnectors typically consist of a stationary contact and a moving contact that can engage or disengage with the stationary contact. The engagement or disengagement of the moving and stationary contacts controls the disconnector's closing and opening. When the moving and stationary contacts separate (i.e., when opening), existing disconnectors generate an arc. This arc can potentially burn not only the moving and stationary contacts but also other components within the disconnector.

[0003] In view of the existence of the above problems, it is necessary to study an isolating switch structure that can quickly extinguish the arc when opening the switch. Utility Model Content

[0004] The purpose of the utility model is to provide an isolating switch structure, which can quickly extinguish the arc when opening the switch.

[0005] In order to achieve the above objectives, the solution of the present invention is:

[0006] A disconnect switch structure includes a switch body, a static contact fixedly arranged in the switch body, and a moving contact movably arranged in the switch body, wherein the static contact is provided with a static arc contact and a static main contact arranged around the static arc contact, and the moving contact is provided with a moving arc contact and a moving main contact arranged around the moving arc contact, the moving arc contact movably contacts the static arc contact, and the moving main contact movably contacts the static main contact; the middle portion of the static arc contact is equipped with a static permanent magnet, the middle portion of the moving arc contact is equipped with a movable moving permanent magnet and a reset spring that drives the moving permanent magnet to move toward the static permanent magnet, the moving permanent magnet and the static permanent magnet are arranged opposite to each other and magnetically attracted to each other, and the static arc contact movably pushes the moving permanent magnet.

[0007] A sliding groove is formed in the middle of the moving arc contact, the moving permanent magnet is movably fitted in the sliding groove, the return spring is accommodated in the sliding groove and pushes the moving permanent magnet; the static arc contact is movably inserted into the sliding groove.

[0008] The moving permanent magnet is matched with a protective cover which covers the side of the moving permanent magnet facing the static permanent magnet.

[0009] The material of the protective cover is polytetrafluoroethylene.

[0010] The static arc contact covers the static permanent magnet.

[0011] One end of the moving arc contact facing the static arc contact is provided with a moving end strong electricity-resistant part, and one end of the static arc contact facing the moving arc contact is provided with a static end strong electricity-resistant part.

[0012] The material of the moving end strong electrical resistance part and the static end strong electrical resistance part is copper-tungsten alloy.

[0013] After adopting the above scheme, the working principle of the utility model is:

[0014] When the utility model is in the closed state, the moving arc contact and the moving main contact of the moving contact respectively contact the static arc contact and the static main contact of the static contact. At the same time, the static arc contact pushes the moving permanent magnet to drive the reset spring to compress. The reset spring can play a closing buffer role.

[0015] When the utility model is in the opening state, the moving contact moves toward the original static contact, so that the moving arc contact and the moving main contact of the moving contact are respectively separated from the contact with the static arc contact and the static main contact of the static contact; in the process of opening, the reset spring resets and drives the moving permanent magnet to move toward the static permanent magnet, so that the moving permanent magnet is close to the arc striking point, so that the arc generated in the opening process will continue to be affected by the magnetic field generated between the moving permanent magnet and the static permanent magnet and produce high-speed rotation (based on the Ampere force principle), so that the arc is quickly cooled and extinguished; wherein, the moving permanent magnet and the static permanent magnet are opposite to each other and magnetically attracted to each other, so that the magnetic field generated between the moving permanent magnet and the static permanent magnet is strong, which is more conducive to quickly cooling and extinguishing the arc; in addition, when opening, the pushing effect of the reset spring on the moving permanent magnet will react on the moving contact, so that the moving contact moves faster, which also helps to quickly extinguish the arc.

[0016] As can be seen from the above, the utility model can quickly extinguish the arc when opening the switch, which helps to protect various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the utility model in the closed state.

[0018] Figure 2 This is a schematic diagram of the utility model when opening the switch Figure 1 .

[0019] Figure 3 for Figure 2 Enlarged view of point a.

[0020] Figure 4 This is a schematic diagram of the utility model when opening the switch Figure 2 .

[0021] Figure 5 for Figure 4 Enlarged view of point b.

[0022] Figure 6 This is a schematic diagram of the utility model in the open state.

[0023] Description of labels:

[0024] Switch body 1,

[0025] Static contact 2, static arc contact 21, static end strong electric resistance part 211, static main contact 22,

[0026] Moving contact 3, moving arc contact 31, chute 311, moving end strong electric resistance part 312, moving main contact 32,

[0027] Static permanent magnet 4,

[0028] Moving permanent magnet 5,

[0029] Return spring 6,

[0030] Protective cover 7,

[0031] Arc E, magnetic field M. DETAILED DESCRIPTION

[0032] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0033] like Figures 1 to 6 As shown, the utility model discloses an isolating switch structure, which includes a switch body 1, a static contact 2 fixedly arranged in the switch body 1, and a moving contact 3 movably arranged in the switch body 1, the static contact 2 is provided with a static arc contact 21 and a static main contact 22 arranged around the static arc contact 21, the moving contact 3 is provided with a moving arc contact 31 and a moving main contact 32 arranged around the moving arc contact 31, the moving arc contact 31 movably contacts the static arc contact 21, and the moving main contact 32 movably contacts the static main contact 22.

[0034] The key to the present invention is that: the middle part of the static arc contact 21 is equipped with a static permanent magnet 4, the middle part of the moving arc contact 31 is equipped with a movable dynamic permanent magnet 5 and a reset spring 6 that drives the dynamic permanent magnet 5 to move toward the static permanent magnet 4, the dynamic permanent magnet 5 is opposite to the static permanent magnet 4 and is magnetically attracted to each other, and the static arc contact 21 movably pushes the dynamic permanent magnet 5.

[0035] The working principle of this utility model is:

[0036] Cooperate Figure 1 As shown, when the present invention is in the closed state, the moving arc contact 31 and the moving main contact 32 of the moving contact 3 contact the static arc contact 21 and the static main contact 22 of the static contact 2 respectively. At the same time, the static arc contact 21 pushes the moving permanent magnet 5 to drive the reset spring 6 to compress. The reset spring 6 can play a closing buffer role.

[0037] Cooperate Figures 2 to 6As shown, when the utility model is in the opening state, the moving contact 3 moves toward the static contact 2, so that the moving arc contact 31 and the moving main contact 32 of the moving contact 3 are respectively separated from the static arc contact 21 and the static main contact 22 of the static contact 2; in the process of opening, the reset spring 6 is reset and drives the moving permanent magnet 5 to move toward the static permanent magnet 4, so that the moving permanent magnet 5 will be close to the arc striking point, so that the arc E generated in the opening process will continue to be affected by the arc generated between the moving permanent magnet 5 and the static permanent magnet 4. The moving permanent magnet 5 and the static permanent magnet 4 are arranged opposite to each other and magnetically attracted to each other, so that the magnetic field M generated between the moving permanent magnet 5 and the static permanent magnet 4 is strong, which is more conducive to quickly cooling and extinguishing the arc E. In addition, when the switch is opened, the pushing action of the reset spring 6 on the moving permanent magnet 5 will react on the moving contact 3, causing the moving contact 3 to move more quickly, which also helps to quickly extinguish the arc E.

[0038] As can be seen from the above, the utility model can quickly extinguish the arc E when opening the circuit breaker, which helps to protect various components.

[0039] In the embodiment of the present invention, a sliding groove 311 is formed in the middle of the moving arcing contact 31. The moving permanent magnet 5 is movably engaged in the sliding groove 311. The return spring 6 is accommodated in the sliding groove 311 and pushes against the moving permanent magnet 5. The stationary arcing contact 21 is movably inserted into the sliding groove 311 and movably pushes against the moving permanent magnet 5. This arrangement of the present invention effectively prevents the moving permanent magnet 5 and the return spring 6 from falling off.

[0040] In an embodiment of the present invention, the moving permanent magnet 5 is equipped with a protective cover 7 covering the side of the moving permanent magnet 5 facing the static permanent magnet 4. The protective cover 7 can prevent the moving permanent magnet 5 from being burned by the arc E and affected by high temperature. The material of the protective cover 7 can be polytetrafluoroethylene.

[0041] In the embodiment of the present invention, the static arc contact 21 covers the static permanent magnet 4 ; this arrangement can prevent the static permanent magnet 4 from being burned by the arc E and affected by high temperature.

[0042] In an embodiment of the present utility model, a moving end strong electrical resistance part 312 is provided at one end of the moving arc contact 31 facing the static arc contact 21, and a static end strong electrical resistance part 211 is provided at one end of the static arc contact 21 facing the moving arc contact 31. The moving end strong electrical resistance part 312 and the static end strong electrical resistance part 211 can withstand the action of the arc E well and are not easily damaged. The material of the moving end strong electrical resistance part 312 and the static end strong electrical resistance part 211 can be copper-tungsten alloy.

[0043] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An isolating switch structure comprising a switch body, a stationary contact fixedly disposed in the switch body, and a movable contact movably disposed in the switch body, wherein the stationary contact is provided with a stationary arcing contact and a stationary main contact disposed around the stationary arcing contact, and the movable contact is provided with a moving arcing contact and a moving main contact disposed around the moving arcing contact, the moving arcing contact movably contacting the stationary arcing contact, and the moving main contact movably contacting the stationary main contact; characterized in that: The middle part of the static arc contact is equipped with a static permanent magnet, the middle part of the moving arc contact is equipped with a movable dynamic permanent magnet and a reset spring that drives the dynamic permanent magnet to move toward the static permanent magnet. The dynamic permanent magnet and the static permanent magnet are arranged opposite to each other and are magnetically attracted to each other, and the static arc contact movably pushes the dynamic permanent magnet.

2. The isolating switch structure according to claim 1, characterized in that: A sliding groove is formed in the middle of the moving arc contact, and the moving permanent magnet is movably engaged in the sliding groove. The return spring is accommodated in the sliding groove and pushes the moving permanent magnet. The static arc contact is movably inserted into the sliding groove.

3. An isolating switch structure according to claim 1 or 2, characterized in that: The moving permanent magnet is matched with a protective cover which covers the side of the moving permanent magnet facing the static permanent magnet.

4. The isolating switch structure according to claim 3, characterized in that: The material of the protective cover is polytetrafluoroethylene.

5. The isolating switch structure according to claim 1, wherein: The static arc contact covers the static permanent magnet.

6. The isolating switch structure according to claim 1, characterized in that: One end of the moving arc contact facing the static arc contact is provided with a moving end strong electricity-resistant part, and one end of the static arc contact facing the moving arc contact is provided with a static end strong electricity-resistant part.

7. The isolating switch structure according to claim 6, characterized in that: The material of the moving end strong electrical resistance part and the static end strong electrical resistance part is copper-tungsten alloy.

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