Magnetic blow-out type isolating switch contact device

Abstract

The utility model belongs to the technical field of disconnecting switches, and discloses a magnetic blow-out type disconnecting switch contact device which comprises a moving side contact mechanism and a static side contact mechanism. The moving side contact mechanism comprises a moving contact seat, a moving contact, a moving arcing contact and a first magnet. The movable contact seat is provided with a sliding hole; the moving contact is slidably arranged in the sliding hole, and one end of the moving contact is provided with a first blind hole; the moving arc contact is arranged in the first blind hole in a sliding manner; the first magnet is arranged in the first blind hole. The static side contact mechanism comprises a static contact seat, a static arc contact and a second magnet. A second blind hole is formed in one end of the static contact seat; the static arc contact is arranged in the second blind hole; the second magnet is arranged in the second blind hole, and the opposite ends of the first magnet and the second magnet are homopolar. According to the utility model, when the moving arc contact and the static arc contact are separated, the contact area between the arc and the insulating gas is expanded, and the extinguishing of the arc is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disconnecting switch, especially to a magnetic blow type disconnecting switch contact device. BACKGROUND

[0002] The disconnecting switch is an important part of GIS (gas insulated metal enclosed switch), in the prior art, the disconnecting switch generally comprises a moving contact seat, a moving contact, a moving arc contact, a static contact seat and a static arc contact, the moving contact is slidingly arranged in a sliding hole of the moving contact seat, the static arc contact is arranged on the static contact, and the moving contact is provided with the moving arc contact at one end thereof facing the static contact seat, when the disconnecting switch is closed, the moving contact is inserted into the static contact seat, and the static arc contact is embedded in the moving arc contact, when the disconnecting switch is opened, the moving contact is separated from the static contact, and the moving arc contact is separated from the static arc contact to extinguish the arc. When the disconnecting switch is opened, the arc duration is long, and the moving arc contact and the static arc contact are seriously burned after long-time use, which seriously affects the insulation and current-carrying performance of the disconnecting switch. SUMMARY

[0003] The utility model discloses a magnetic blow type disconnecting switch contact device which can accelerate the extinction of the arc.

[0004] To achieve the purpose, the utility model adopts the following technical scheme:

[0005] The magnetic blow type disconnecting switch contact device comprises a moving contact mechanism and a static contact mechanism which are oppositely arranged along a first direction, wherein,

[0006] The moving contact mechanism comprises:

[0007] The moving contact seat is provided with a sliding hole extending along the first direction;

[0008] The moving contact is slidingly arranged in the sliding hole, and the moving contact is provided with a first blind hole at one end thereof facing the static contact mechanism;

[0009] The moving arc contact is slidingly arranged in the first blind hole;

[0010] The first magnet is arranged in the first blind hole;

[0011] The static contact mechanism comprises:

[0012] The static contact seat is provided with a second blind hole extending along the first direction at one end thereof facing the moving contact mechanism;

[0013] The static arc contact is arranged in the second blind hole;

[0014] The second magnet is arranged in the second blind hole, and the first magnet and the second magnet have the same polarity at one end thereof facing each other.

[0015] As an optional solution, the inner wall of the first blind hole is provided with a first ring groove, and the first magnet is arranged in the first ring groove;

[0016] The inner wall of the second blind hole is provided with a second ring groove, and the second magnet is arranged in the second ring groove.

[0017] As an optional solution, the movable side contact mechanism further comprises a sliding assembly, the sliding assembly is slidingly arranged in the first blind hole, and the movable arc contact is arranged at one end of the sliding assembly facing the static side contact mechanism;

[0018] During the closing process of the magnetic blowout disconnecting switch contact device, the sliding assembly can drive the movable arc contact to slide away from the static side contact mechanism when the movable arc contact contacts the static arc contact;

[0019] During the opening process of the magnetic blowout disconnecting switch contact device, the sliding assembly can drive the movable arc contact to slide towards the static side contact mechanism.

[0020] As an optional solution, the sliding assembly comprises a sliding piece and an elastic piece, the sliding piece is slidingly arranged in the first blind hole, the movable arc contact is arranged at one end of the sliding piece facing the static side contact mechanism, and the elastic piece is arranged in the first blind hole and elastically abuts against the sliding piece.

[0021] As an optional solution, one end of the sliding piece away from the static side contact mechanism is provided with a containing hole;

[0022] The bottom of the first blind hole is provided with a guide rod, the elastic piece is sleeved outside the guide rod, one end of the elastic piece elastically abuts against the bottom of the containing hole, and the other end of the elastic piece elastically abuts against the outer wall of the guide rod or the bottom of the first blind hole.

[0023] As an optional solution, one end of the sliding piece facing the static side contact mechanism is provided with a second threaded hole;

[0024] The movable arc contact comprises a contact part and a connecting rod part connected with each other, the contact part can contact or separate from the static arc contact, the connecting rod part is screwed into the second threaded hole, and the contact part abuts against one end of the sliding piece facing the static side contact mechanism.

[0025] As an optional solution, the sliding assembly further comprises a first guide sleeve;

[0026] One of the outer wall of the sliding piece and the inner wall of the first blind hole is provided with a first guide groove, the first guide sleeve is arranged in the first guide groove and slidingly abuts against the other.

[0027] As an alternative, the first magnet and the second magnet are both flexible circular rings.

[0028] As an alternative, along the axis of the flexible circular ring, the flexible circular ring is provided with a first notch through the side wall thereof.

[0029] As an alternative, a driving member, a rack and a gear are further included, the rack is arranged on the outer wall of the movable contact and extends along the first direction, the gear is arranged on the movable contact seat and engages with the rack, and the driving member is capable of driving the gear to rotate to drive the movable contact to move along the first direction.

[0030] The utility model discloses the beneficial effect:

[0031] The utility model discloses a kind of magnetic blow disconnecting switch contact devices, movable arc contact and static arc contact are separated to produce arc in the process of opening, since first magnet and second magnet are same pole and are placed, i.e. the side of first magnet and second magnet is same N pole or same S pole, first magnet and second magnet generate magnetic field, the arc generated in magnetic field will be affected by Lorentz force, Lorentz force drives arc rotation and lengthens arc, expands the contact area between arc and insulating gas, accelerates arc to extinguish. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structural schematic diagram of the magnetic blow disconnecting switch contact device provided by the utility model embodiment when opening;

[0033] Figure 2 It is the structural schematic diagram of the magnetic blow disconnecting switch contact device provided by the utility model embodiment when closing;

[0034] Figure 3 It is the structural schematic diagram of movable side contact mechanism related by the utility model embodiment.

[0035] In the drawing:

[0036] 1, movable side contact mechanism;11, movable contact seat;12, movable contact;121, first blind hole;122, guide rod;1221, annular boss;13, movable arc contact;131, contact part;132, connecting rod part;14, first magnet;15, sliding assembly;151, sliding member;152, elastic member;153, first guide sleeve;16, second guide sleeve;17, spring contact finger;18, watchband contact finger;

[0037] 2, static side contact mechanism;21, static contact seat;211, second blind hole;22, static arc contact;23, second magnet;

[0038] 3, rack;4, gear. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar parts or parts having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the description of the present application, unless explicitly defined and limited otherwise, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] The technical scheme of the present application is further illustrated below by combining the drawings and through the specific embodiments.

[0043] As shown in Figures 1-3 The embodiment of the present application provides a magnetic blow type isolating switch contact device, which comprises a movable side contact mechanism 1 and a static side contact mechanism 2 which are relatively distributed along a first direction (the moving direction of the movable contact 12).

[0044] Among them, the movable side contact mechanism 1 comprises a movable contact seat 11, a movable contact 12, a movable arc contact 13 and a first magnet 14. The movable contact seat 11 is provided with a sliding hole extending along the first direction; the movable contact 12 is slidably arranged in the sliding hole, and one end of the movable contact 12 facing the static side contact mechanism 2 is provided with a first blind hole 121 extending along the first direction; the movable arc contact 13 is slidably arranged in the first blind hole 121; the first magnet 14 is arranged in the first blind hole 121.

[0045] The static side contact mechanism 2 comprises a static contact seat 21, a static arc contact 22 and a second magnet 23. The static contact seat 21 is provided with a second blind hole 211 extending in the first direction at one end thereof facing the dynamic side contact mechanism 1; the static arc contact 22 is arranged in the second blind hole 211; and the second magnet 23 is arranged in the second blind hole 211, and the first magnet 14 and the second magnet 23 have the same polarity at one end thereof facing each other.

[0046] When the magnetic blow type disconnecting switch contact device is closed, the dynamic contact 12 moves in the first direction towards the static side contact mechanism 2 and slides into the second blind hole 211, the dynamic arc contact 13 contacts the static arc contact 22, and the dynamic arc contact 13 slides in the first direction towards the bottom of the first blind hole 121 under the action of the static arc contact 22 until the closing operation is completed; when the magnetic blow type disconnecting switch contact device is opened, the dynamic contact 12 moves away from the static side contact mechanism 2 and slides out of the second blind hole 211, and in the process that the dynamic contact 12 slides out of the second blind hole 211, the dynamic arc contact 13 can slide reversely in the first direction and the static arc contact 22 always keeps in contact, that is, the dynamic arc contact 13 is separated from the static arc contact 22 after the dynamic contact 12 completely slides out of the second blind hole 211, and an arc is generated when the dynamic arc contact 13 and the static arc contact 22 are separated.

[0047] When the dynamic arc contact 13 and the static arc contact 22 are separated, the first magnet 14 and the second magnet 23 are arranged in the same polarity, that is, the first magnet 14 and the second magnet 23 have the same N-pole or S-pole at one end thereof facing each other, the first magnet 14 and the second magnet 23 generate a magnetic field, the generated arc is subjected to a Lorentz force in the magnetic field, the Lorentz force drives the arc to rotate and lengthen the arc, and the contact area between the arc and the insulating gas is expanded, and the arc is extinguished faster.

[0048] In addition, the inner wall of the first blind hole 121 is provided with a first ring groove, the first magnet 14 is arranged in the first ring groove, the inner wall of the second blind hole 211 is provided with a second ring groove, the second magnet 23 is arranged in the second ring groove, and the first magnet 14 and the second magnet 23 are arranged in the first ring groove and the second ring groove respectively, so that the use of fasteners such as screws is avoided, the installation of the first magnet 14 and the second magnet 23 is convenient, and the movement of the dynamic contact 12 and the dynamic arc contact 13 is not affected.

[0049] Specifically, the first magnet 14 and the second magnet 23 are both flexible circular rings, the first magnet 14 and the second magnet 23 are processed by using a flexible material, so that the first magnet 14 and the second magnet 23 can deform during installation and restore the deformation after installation to prevent falling and facilitate installation.

[0050] Further, along the axis of the flexible circular ring, the flexible circular ring is provided with a first gap penetrating through the sidewall thereof, by opening the first gap for the first magnet 14 and the second magnet 23, the first magnet 14 and the second magnet 23 are more easily deformed during installation, and the installation is more convenient.

[0051] Optionally, referring to Figure 3 , the movable contact mechanism 1 further comprises a sliding assembly 15, the movable arc contact 13 is slidably arranged in the first blind hole 121 through the sliding assembly 15, the sliding assembly 15 is slidably arranged in the first blind hole 121, and the movable arc contact 13 is arranged at one end of the sliding assembly 15 facing the stationary contact mechanism 2. During the closing process of the magnetic blowout disconnecting switch contact device, the movable contact 12 moves towards the stationary contact mechanism 2 along the first direction and slides into the second blind hole 211, the movable arc contact 13 contacts the stationary arc contact 22, and the sliding assembly 15 drives the movable arc contact 13 to move away from the stationary contact mechanism 2; during the opening process of the magnetic blowout disconnecting switch contact device, the movable contact 12 moves away from the stationary contact mechanism 2 and before completely sliding out of the second blind hole 211, the sliding assembly 15 can make the movable arc contact 13 slide reversely along the first direction and the stationary arc contact 22 always keeps in contact.

[0052] More specifically, the sliding assembly 15 comprises a sliding piece 151 and an elastic piece 152, the sliding piece 151 is slidably arranged in the first blind hole 121, and the movable arc contact 13 is arranged at one end of the sliding piece 151 facing the stationary contact mechanism 2, and the elastic piece 152 is arranged in the first blind hole 121 and elastically abuts against the sliding piece 151. When the movable contact 12 moves towards the stationary contact mechanism 2 along the first direction and slides into the second blind hole 211, and the movable arc contact 13 contacts the stationary arc contact 22, the movable arc contact 13 can drive the sliding piece 151 to move and compress the elastic piece 152, and when the movable contact 12 reversely slides along the first direction, the elastic piece 152 releases the compression potential energy.

[0053] In the embodiment, the spring contact finger 17 is arranged between the movable contact seat 11 and the movable contact 12 to ensure reliable current flow between the movable contact seat 11 and the movable contact 12; the inner wall of the second blind hole 211 is also provided with the spring contact finger 17 to ensure the current flow between the movable contact 12 and the stationary contact seat 21 when the movable contact 12 slides into the second blind hole 211. The sliding piece 151 is a copper piece, and the watchband contact finger 18 is arranged between the sliding piece 151 and the movable contact 12 to ensure reliable current flow between the sliding piece 151 and the movable contact 12.

[0054] Further, the end of the sliding member 151 away from the static contact mechanism 2 is provided with a receiving hole; the bottom of the first blind hole 121 is provided with a guide rod 122, the elastic member 152 is sleeved outside the guide rod 122, and one end of the elastic member 152 abuts against the bottom of the receiving hole, and the other end abuts against the outer wall of the guide rod 122 or the bottom of the first blind hole 121. When the sliding member 151 moves away from the static contact mechanism 2 and compresses the elastic member 152, the receiving hole can avoid the guide rod 122, so as to prevent the guide rod 122 and the sliding member 151 from interfering.

[0055] In the embodiment, the outer wall of the guide rod 122 is provided with an annular boss 1221, and the other end of the elastic member 152 abuts against the annular boss 1221. The guide rod 122 is made of insulating material.

[0056] Optionally, the elastic member 152 is a spring.

[0057] In order to ensure smooth sliding of the sliding member 151, the sliding assembly 15 further comprises a first guide sleeve 153, one of the outer wall of the sliding member 151 and the inner wall of the first blind hole 121 is provided with a first guide groove, and the first guide sleeve 153 is arranged in the first guide groove and slidably abuts against the other one. By arranging the first guide sleeve 153, the wear of the sliding member 151 or the movable contact 12 can be effectively prevented. In the embodiment, the outer wall of the sliding member 151 is provided with the first guide groove, and the first guide sleeve 153 is arranged in the first guide groove and slidably abuts against the inner wall of the first blind hole 121.

[0058] In order to ensure smooth sliding of the movable contact 12, referring again to Figure 1 , the movable contact mechanism 1 further comprises a second guide sleeve 16, one of the inner wall of the sliding hole and the outer wall of the movable contact 12 is provided with a second guide groove, and the second guide sleeve 16 is arranged in the second guide groove and slidably abuts against the other one. By arranging the second guide sleeve 16, the wear of the movable contact 12 or the movable contact seat 11 can be effectively prevented. In the embodiment, the inner wall of the sliding hole is provided with the second guide groove, and the second guide sleeve 16 is arranged in the second guide groove and slidably abuts against the outer wall of the movable contact 12.

[0059] Optionally, the first guide sleeve 153 and the second guide sleeve 16 are both made of polytetrafluoroethylene, which has the characteristics of smoothness and wear resistance.

[0060] Optionally, the bottom of the first blind hole 121 is provided with a first threaded hole, the guide rod 122 is screwed into the first threaded hole, and the annular boss 1221 abuts against the bottom of the first blind hole 121. This structure makes the installation of the guide rod 122 more convenient.

[0061] Optionally, the sliding member 151 is provided with a second threaded hole at one end thereof towards the static side contact mechanism 2, the moving arc contact 13 comprises a contact portion 131 and a connecting rod portion 132 connected with each other, the contact portion 131 is used to contact with the static arc contact 22, the connecting rod portion 132 is screwed into the second threaded hole, and the contact portion 131 abuts against one end of the sliding member 151 towards the static side contact mechanism 2, so as to realize the connection between the moving arc contact 13 and the sliding member 151.

[0062] Optionally, the bottom of the second blind hole 211 is provided with a third threaded hole, and the static arc contact 22 is screwed into the third threaded hole, so as to realize the installation of the static arc contact 22.

[0063] In order to realize the reciprocating movement of the moving contact 12 along the first direction, the magnetic blowout circuit breaker contact device further comprises a driving member, a rack 3 and a gear 4, the rack 3 is arranged on the outer wall of the moving contact 12 and extends along the first direction, the gear 4 is arranged on the moving contact seat 11 and is engaged with the rack 3, and the driving member (which can be selected as a motor) can drive the gear 4 to rotate so as to drive the moving contact 12 to move along the first direction.

[0064] It can be understood that the second guide sleeve 16 is provided with a second notch penetrating through the side wall thereof along the axis thereof, and the second notch is used to avoid the rack 3.

[0065] Obviously, the above embodiments of the present application are only examples for clearly explaining the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A magnetic blowout type disconnector contact device, characterized in that, It includes a moving-side contact mechanism (1) and a stationary-side contact mechanism (2) that are relatively distributed along a first direction, wherein, The moving side contact mechanism (1) includes: The movable contact seat (11) is provided with a sliding hole extending along the first direction; The moving contact (12) is slidably disposed in the sliding hole, and a first blind hole (121) is provided at one end of the moving contact (12) facing the stationary contact mechanism (2); The moving arc contact (13) is slidably disposed within the first blind hole (121); A first magnet (14) is disposed within the first blind hole (121); The stationary contact mechanism (2) includes: The stationary contact seat (21) has a second blind hole (211) extending along the first direction at one end facing the moving side contact mechanism (1); A static arc contact (22) is disposed within the second blind hole (211); The second magnet (23) is disposed in the second blind hole (211), and the opposite ends of the first magnet (14) and the second magnet (23) are the same pole.

2. The magnetic blowout type disconnector contact device according to claim 1, characterized in that, The inner wall of the first blind hole (121) is provided with a first annular groove, and the first magnet (14) is disposed in the first annular groove; The inner wall of the second blind hole (211) is provided with a second annular groove, and the second magnet (23) is disposed in the second annular groove.

3. The magnetic blowout type disconnector contact device according to claim 1, characterized in that, The moving side contact mechanism (1) further includes a sliding component (15), which is slidably disposed in the first blind hole (121), and the moving arc contact (13) is disposed at one end of the sliding component (15) facing the stationary side contact mechanism (2). During the closing process of the magnetic blow-out disconnector contact device, the sliding component (15) can drive the moving arc contact (13) to slide away from the stationary side contact mechanism (2) when the moving arc contact (13) contacts the stationary arc contact (22); During the opening process of the magnetic blow-out disconnector contact device, the sliding component (15) can drive the moving arc contact (13) to slide toward the stationary contact mechanism (2).

4. The magnetic blowout type disconnector contact device according to claim 3, characterized in that, The sliding assembly (15) includes a slider (151) and an elastic member (152). The slider (151) is slidably disposed in the first blind hole (121). The moving arc contact (13) is disposed at one end of the slider (151) facing the stationary contact mechanism (2). The elastic member (152) is disposed in the first blind hole (121) and elastically abuts against the slider (151).

5. The magnetic blowout type disconnector contact device according to claim 4, characterized in that, The sliding member (151) has a receiving hole at one end away from the stationary contact mechanism (2); A guide rod (122) is provided at the bottom of the first blind hole (121). The elastic element (152) is sleeved on the guide rod (122), and one end of the elastic element (152) elastically abuts against the bottom of the receiving hole, and the other end elastically abuts against the outer wall of the guide rod (122) or the bottom of the first blind hole (121).

6. The magnetic blowout type disconnector contact device according to claim 4, characterized in that, The sliding member (151) has a second threaded hole at one end facing the stationary contact mechanism (2); The moving arc contact (13) includes a contact portion (131) and a connecting rod portion (132) connected to each other. The contact portion (131) can contact or separate from the stationary arc contact (22). The connecting rod portion (132) is screwed into the second threaded hole. The contact portion (131) abuts against one end of the sliding member (151) facing the stationary side contact mechanism (2).

7. The magnetic blowout type disconnector contact device according to claim 4, characterized in that, The sliding assembly (15) also includes a first guide sleeve (153); One of the outer wall of the slider (151) and the inner wall of the first blind hole (121) is provided with a first guide groove, and the first guide sleeve (153) is disposed in the first guide groove and slides against the other.

8. The magnetic blowout type disconnector contact device according to any one of claims 1-7, characterized in that, Both the first magnet (14) and the second magnet (23) are flexible circular rings.

9. The magnetic blowout type disconnector contact device according to claim 8, characterized in that, Along the axis of the flexible ring, the flexible ring is provided with a first notch that penetrates its sidewall.

10. The magnetic blowout type disconnector contact device according to any one of claims 1-7, characterized in that, It also includes a drive member, a rack (3) and a gear (4). The rack (3) is disposed on the outer wall of the moving contact (12) and extends along the first direction. The gear (4) is disposed on the moving contact seat (11) and meshes with the rack (3). The drive member can drive the gear (4) to rotate so as to move the moving contact (12) along the first direction.

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