CN211507488U

CN211507488U - Quick earthing switch

Info

Publication number: CN211507488U
Application number: CN202020197580.9U
Authority: CN
Inventors: 王伟; 夏水银; 郭剑火; 姚军锋; 龚恩乐; 王宁; 万江; 刘月菲; 江宝霞; 张钱伟; 高超; 陈振超
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-09-15
Anticipated expiration: 2030-02-20

Abstract

A quick grounding switch comprises an operating mechanism, a fixed contact and a guide component, wherein a moving contact component is arranged between the guide component and the fixed contact, and the operating mechanism drives the moving contact component to be matched with the fixed contact under the action of the guide component; the moving contact component comprises a moving contact, an insulating plate and a driving part, the moving contact is fixed on one side, close to the fixed contact, of the insulating plate, one side, far away from the fixed contact, of the insulating plate is connected with the fixing part of the guide component, the fixing part is connected with the driving part, and the operating mechanism drives the fixing part through the driving part to enable the insulating plate to move linearly and drive the moving contact to be matched with the fixed contact. The utility model discloses a quick earthing switch fixes the moving contact on the insulation board, and operating device passes through driving piece drive insulation board and drives the moving contact motion along linear motion's while, has guaranteed the uniformity of moving contact motion.

Description

Quick earthing switch

Technical Field

The utility model relates to a high-voltage electrical equipment field, concretely relates to quick earthing switch.

Background

At present, with the rapid development of electric power construction, the power grid is continuously enlarged, the capacity is also continuously increased, and high-voltage power grid lines are often applied in a long distance and multiple loops on the same tower, so that the rapid grounding switch is required to have the capability of being switched on and off beyond the class B grounding switch in IEC62271-102 appendix C. However, the existing earthing switch has the same structure, and is driven by the mode of arranging the earthing switch in a shell and passing through the crank arm, the arc motion of the crank arm causes the moving contact to jump and shake in the motion process, and the centering degree of the matching of the moving contact and the static contact is influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, quick earthing switch that the reliability is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a quick grounding switch comprises an operating mechanism, a fixed contact and a guide component, wherein a moving contact component is arranged between the guide component and the fixed contact, and the operating mechanism drives the moving contact component to be matched with the fixed contact under the action of the guide component; the moving contact component comprises a plurality of moving contacts, an insulating plate and a driving part, the moving contacts are fixed on one side, close to the fixed contact, of the insulating plate, one side, far away from the fixed contact, of the insulating plate is connected with the fixing part of the guide component, the fixing part is connected with the driving part, and the operating mechanism drives the fixing part through the driving part to enable the insulating plate to move linearly and drive the moving contacts to be matched with the fixed contact.

Further, the direction subassembly includes mounting, guide bar and bottom plate, the both ends of mounting are equipped with the recess that supplies the guide bar to pass, the guide bar is installed perpendicularly on the bottom plate, is equipped with the connecting hole in the central authorities of bottom plate, the driving piece passes the connecting hole and is connected with operating device, and the mounting is linear motion along the guide bar under the effect of driving piece, and the insulation board is followed the mounting and is linear motion jointly.

Further, the driving piece comprises a sealing assembly, a sealing rod and a transmission joint, the sealing assembly is provided with a through hole penetrating through two ends, two ends of the sealing assembly are respectively connected with the operating mechanism and the bottom plate, the sealing rod penetrates through the through hole and can move linearly along the axis of the through hole, one end of the sealing rod is connected with the fixing piece, and the other end of the sealing rod is connected with the operating mechanism through the transmission joint.

Furthermore, the groove is a groove with two open ends, and a guide sleeve is arranged in the groove; the sealing assembly consists of a plurality of sealing elements, and the transmission joint is a transmission joint with adjustable length.

Further, the device also comprises a housing; the shell and the operating mechanism are respectively fixed on two sides of the bottom plate of the guide assembly, the operating mechanism is connected to one side of the bottom plate through the supporting frame, the shell is fixed on the other side of the bottom plate in a sealing mode, and the moving contact assembly and the static contact are sealed in the shell.

Furthermore, the moving contact is a three-phase moving contact, the static contact is a three-phase static contact, three bulges are formed on one side of the insulating plate close to the static contact in an outward protruding mode, the insulating plate is integrally shaped like a Chinese character 'shan', and each phase of moving contact of the three-phase moving contacts is correspondingly arranged on one bulge.

Furthermore, the moving contact component also comprises a shielding ring for shielding an electric field, and the shielding ring is fixedly arranged between the moving contact and the static contact; when the switch is switched on, the moving contact penetrates through the shielding ring to be matched with the fixed contact; when the brake is switched off, the moving contact is disengaged from the static contact, and the end part of the moving contact corresponds to the shielding ring.

The grounding device further comprises a grounding leading-out terminal, the connecting end of the grounding leading-out terminal is connected with the moving contact through a flexible connecting piece, a short-circuit flow guide row is arranged at the grounding end of the grounding leading-out terminal, and the short-circuit flow guide row is connected with a grounding copper bar to achieve grounding.

Furthermore, a through hole is formed in the bottom plate, one end of the grounding leading-out terminal is fixedly installed on the bottom plate to serve as a grounding end, the other end of the grounding leading-out terminal penetrates through the through hole to serve as a connecting end, and an installation plate is arranged at the connecting end; the flexible connecting piece is U-shaped, one end of the flexible connecting piece is connected with the moving contact, and the other end of the flexible connecting piece is connected with the grounding leading-out terminal through the mounting plate.

Furthermore, the mounting plate comprises a pressing plate and a transition mounting plate, and one end of the flexible connecting piece is fixed between the pressing plate and the transition mounting plate; the pressure plate is provided with a shielding ring, the shielding ring is arranged at the end part of the pressure plate in a cantilever manner, the central axis of the shielding ring coincides with the central axis of the moving contact, and the shielding ring corresponds to the end part of the moving contact during opening.

Compared with the existing grounding switch, the quick grounding switch adopts a brand-new structure, a plurality of moving contacts are fixed on the same insulating plate, the operating mechanism drives the insulating plate to move along a straight line through the driving piece and simultaneously drives the moving contacts to move, the consistency of the movement of the moving contacts is ensured, and the quick grounding switch is simpler than the existing operating mode that the moving contacts are respectively operated through a crank arm and a three-phase connecting plate; meanwhile, under the matching of the driving piece, the guide assembly and the insulating plate, the linear motion of the moving contact cannot generate jumping or shaking due to the rotation of the operating mechanism, and the centering degree of the matching of the moving contact and the static contact cannot be influenced.

In addition, the insulating plate in the shape of a Chinese character 'shan' is adopted, so that the movement stroke of the moving contact is shortened, and the opening and closing speed is favorably improved; the operating mechanism and the housing are respectively fixed on two sides of the bottom plate, the housing forms a sealed air chamber on one side of the bottom plate, and all parts are directly or indirectly arranged on the bottom plate, so that the installation difficulty of the parts is reduced; the shielding ring is arranged on the grounding leading-out terminal in a cantilever type installation mode, so that the number and the types of parts are reduced, and the installation mode and the installation position are more flexible; a flexible connecting piece is adopted between the grounding leading-out terminal and the moving contact, and the flexible connecting piece is U-shaped, so that one end of the flexible connecting piece can move together with the moving contact; the transmission joint is a transmission joint with adjustable length, and is beneficial to adjusting the initial position of the moving contact.

Drawings

Fig. 1 is a schematic structural diagram of a fast grounding switch of the present invention;

fig. 2 is a schematic diagram of an internal structure of a fast grounding switch according to the present invention;

fig. 3 is a sectional view a-a of fig. 2.

Detailed Description

The following description will further describe a specific embodiment of a fast grounding switch according to the present invention with reference to the embodiments shown in fig. 1 to 3. The present invention is not limited to the description of the following embodiments.

A fast grounding switch comprises an operating mechanism 1, a fixed contact 2 and a guide component, wherein a moving contact component is arranged between the guide component and the fixed contact 2, and the operating mechanism 1 drives the moving contact component to be matched with the fixed contact 2 under the action of the guide component; the moving contact assembly comprises a plurality of moving contacts 31, an insulating plate 32 and a driving part, the moving contacts 31 are fixed on one side, close to the fixed contact 2, of the insulating plate 32, one side, far away from the fixed contact 2, of the insulating plate 32 is connected with a fixing part 41 of the guide assembly, the fixing part 41 is connected with the driving part, and the operating mechanism 1 drives the fixing part 41 through the driving part to enable the insulating plate 32 to move linearly and drive the moving contacts 31 to be matched with the fixed contact 2.

Compared with the existing grounding switch, the quick grounding switch of the utility model adopts a brand-new structure, a plurality of moving contacts 31 are fixed on the insulating plate 32, the operating mechanism 1 drives the fixing part 41 through the driving part to drive the moving contacts 31 to move while the insulating plate 32 moves along a straight line, the movement consistency of the moving contacts 31 is ensured, and the operating mode is simpler than the existing operating mode that the moving contacts 31 are respectively operated through a crank arm and a three-phase connecting plate; meanwhile, under the cooperation of the driving element, the guiding assembly and the insulating plate 32, the linear motion of the moving contact 31 cannot generate jumping or shaking due to the rotation of the operating mechanism 1, and the matching centering degree of the moving contact 31 and the static contact 2 cannot be influenced.

As shown in fig. 1-3, an embodiment of a miniaturized fast grounding switch includes an operating mechanism 1, a fixed contact 2, a guide assembly and a grounding leading-out terminal 5, a moving contact assembly is installed between the guide assembly and the fixed contact 2, and the operating mechanism 1 drives the moving contact assembly to be matched with the fixed contact 2 under the action of the guide assembly; the moving contact assembly comprises a plurality of moving contacts 31, an insulating plate 32 and a driving part, the moving contacts 31 are fixed on one side, close to the fixed contact 2, of the insulating plate 32, one side, far away from the fixed contact 2, of the insulating plate 32 is connected with a fixing part 41 of the guide assembly, the fixing part 41 is connected with the driving part, and the operating mechanism 1 drives the fixing part 41 through the driving part to enable the insulating plate 32 to move linearly and drive the moving contacts 31 to be matched with the fixed contact 2. Preferably, the movable contact assembly further includes a shielding ring 36 for shielding an electric field, and the shielding ring 36 is fixedly installed between the movable contact 31 and the stationary contact 2; when switching on, the moving contact 31 passes through the shielding ring 36 to be matched with the static contact 2; during opening, the movable contact 31 is disengaged from the fixed contact 2, and the end of the movable contact 31 corresponds to the shielding ring 36.

As shown in fig. 2 and 3, the guiding assembly includes a fixing member 41, a guiding rod 42 and a bottom plate 43, wherein two ends of the fixing member 41 are provided with grooves (not shown) for the guiding rod 42 to pass through, preferably, the grooves on the fixing member 41 are grooves with two open ends, and a guiding sleeve is disposed in the grooves and can freely swing in the grooves with two open ends. The guide rod 42 is vertically arranged on the bottom plate 43, a connecting hole is formed in the center of the bottom plate 43, the driving piece penetrates through the connecting hole to be connected with the operating mechanism 1, the fixing piece 41 moves linearly along the guide rod 42 under the action of the driving piece, and the insulating plate 32 moves linearly along with the fixing piece 41.

The driving piece comprises a sealing assembly 33, a sealing rod 34 and a transmission joint 35, wherein the sealing assembly 33 is provided with a through hole penetrating through two ends, two ends of the sealing assembly 33 are respectively connected with the operating mechanism 1 and the bottom plate 43, the sealing rod 34 penetrates through the through hole and is arranged in the through hole and can move linearly along the axis of the through hole, one end of the sealing rod 34 is connected with the fixing piece 41, and the other end of the sealing rod 34 is connected with the operating mechanism 1 through the transmission joint 35. One mode of the operating mechanism 1 is that the operating mechanism 1 can rotate clockwise and anticlockwise at a certain angle, a crank arm is installed at the end part of a rotating shaft of the operating mechanism 1, the crank arm is connected with a transmission joint 35, and the transmission joint 35 drives the sealing rod 34 to do linear reciprocating motion. As shown in fig. 2 and 3, during closing, the operating mechanism 1 rotates, the operating mechanism 1 moves the sealing rod 34 upward through the transmission joint 35, the movable contact 31 moves upward through the shielding ring 36, during opening, the operating mechanism 1 moves the sealing rod 34 downward through the transmission joint 35, the movable contact 31 is separated from the stationary contact 2, and the shielding ring 36 shields an electric field corresponding to an end of the movable contact 31. Preferably, an alloy area is arranged at the end of the movable contact 31, and the alloy area plays a role in arc striking during the moving process; the sealing assembly 33 is composed of a plurality of sealing members, so that the sealing rod 34 can ensure that the insulating gas in the sealing gas chamber (not shown in the figure) does not leak out when moving in a straight line in the sealing assembly 33; the transmission joint 35 is preferably an adjustable length transmission joint 35, which facilitates the adjustment of the starting position of the movable contact 31.

As shown in fig. 1 to 3, the connection end of the grounding leading-out terminal 5 is connected to the moving contact 31 through the flexible connection member 6, the grounding end of the grounding leading-out terminal 5 is provided with a short-circuit diversion bar 53, and the short-circuit diversion bar 53 is connected to the grounding copper bar 7 to realize grounding. Specifically, a through hole is formed in the bottom plate 43, one end of the ground leading-out terminal 5 is fixedly mounted on the bottom plate 43 and serves as a ground end, the other end of the ground leading-out terminal 5 penetrates through the through hole and serves as a connecting end, a mounting plate used for being connected with the flexible connecting piece 6 is arranged on the connecting end, the mounting plate preferably comprises a pressing plate 51 and a transition mounting plate 52, and one end of the flexible connecting piece 6 is fixed between the pressing plate 51 and the transition mounting plate 52. The end of the pressing plate 51 may be used to fixedly mount the shielding ring 36, the shielding ring 36 is mounted at the end of the pressing plate 51 in a cantilever mounting manner, so that the central axis of the shielding ring 36 coincides with the central axis of the movable contact 31, the shielding ring 36 corresponds to the end of the movable contact 31 in the opening state, and of course, the shielding ring 36 may also be fixed on the bottom plate 43 by using a bracket or a strut structure. The shield ring 36 is mounted in a cantilever manner, which is different from the conventional mounting manner, so that the mounting manner and the mounting position of the shield ring 36 are more flexible. Further, the shield ring 36 may also adopt a cylindrical spinning structure.

The flexible connecting piece 6 is preferably in a U shape as a whole, one end of the flexible connecting piece 6 is connected with the moving contact 31, the other end of the flexible connecting piece 6 is connected with the grounding leading-out terminal 5 through the mounting plate, and when the moving contact assembly moves along a straight line, the flexible connecting piece 6 connected with the moving contact 31 can move together with the moving contact 31.

As shown in fig. 1-3, as a preferred embodiment, the moving contact 31 is a three-phase moving contact 31, the static contact 2 is a three-phase static contact 2, three protrusions are formed on one side of the insulating plate 32 close to the static contact 2 and protrude outwards, so that the insulating plate 32 is integrally in a shape of a Chinese character 'shan', each moving contact 31 of the three-phase moving contact 31 is correspondingly installed on one protrusion, and this protrusion structure can shorten the distance between the moving contact assembly and the static contact 2, and is beneficial to shortening the switching-on and switching-off strokes. The insulating plate 32 is preferably planar on both sides, one side for connection to the fixing member 41 and the other side for connection to the flexible connecting member 6 of the ground lead-out terminal 5. The insulation plate 32 in the shape of the Chinese character 'shan' reduces the motion stroke of the movable contacts 31 while ensuring the action consistency of the plurality of movable contacts 31, is beneficial to improving the speed of opening and closing, and is also beneficial to the miniaturization design of the whole structure. Of course, the insulating plate 32 may be a line without a protrusion, but the effect of shortening the matching stroke of the moving contact assembly and the fixed contact 2 is not as good as the effect of the insulating plate 32.

A casing (not shown in the figures); the housing and the operating mechanism 1 are respectively fixed on two sides of the bottom plate 43 of the guide assembly. Preferably, as shown in fig. 2, the operating mechanism 1 is connected to one side of the bottom plate 43 through a support frame 11, and is matched with the guide assembly in a waterproof sealing manner; the housing is fixed on the other side of the bottom plate 43 in a sealing manner, so that a sealed air chamber is formed on the other side of the bottom plate 43, the moving contact assembly and the fixed contact 2 are sealed in the housing, and insulating gas is filled in the sealed air chamber. Compare traditional earthing switch, the earthing switch of this embodiment has adopted brand-new assembly structure, has cancelled current shell structure, all parts wherein all directly or indirectly install on bottom plate 43, and the cantilever type installation of cooperation shield ring 36 has again reduced the installation degree of difficulty of spare part, has simplified earthing switch's structure, has reduced earthing switch's volume greatly.

The miniaturized fast grounding switch of the embodiment can be applied to sulfur hexafluoride metal closed type combined electrical equipment, is mainly arranged on the line side of a line interval and the main bus side of a switch station, can cut in static and electromagnetic induction current during working grounding, and can be used as a leading-out wiring end during GIS main loop resistance measurement and breaker mechanical characteristic test.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a quick earthing switch, includes operating device (1), static contact (2) and direction subassembly, its characterized in that: a moving contact component is arranged between the guide component and the static contact (2), and the operating mechanism (1) drives the moving contact component to be matched with the static contact (2) under the action of the guide component; the moving contact component comprises a plurality of moving contacts (31), an insulating plate (32) and a driving part, the moving contacts (31) are fixed on one side, close to the static contact (2), of the insulating plate (32), one side, far away from the static contact (2), of the insulating plate (32) is connected with a fixing part (41) of the guide component, the fixing part (41) is connected with the driving part, and the operating mechanism (1) drives the fixing part (41) through the driving part to enable the insulating plate (32) to move linearly and drive the moving contacts (31) to be matched with the static contact (2).

2. A fast grounding switch as in claim 1, wherein: the direction subassembly includes mounting (41), guide bar (42) and bottom plate (43), the both ends of mounting (41) are equipped with the recess that supplies guide bar (42) to pass, guide bar (42) are installed perpendicularly on bottom plate (43), are equipped with the connecting hole in the central authorities of bottom plate (43), the driving piece passes the connecting hole and is connected with operating device (1), and mounting (41) are linear motion along guide bar (42) under the effect of driving piece, and insulation board (32) are linear motion along mounting (41) jointly.

3. A fast grounding switch as in claim 2, wherein: the driving piece comprises a sealing assembly (33), a sealing rod (34) and a transmission joint (35), wherein the sealing assembly (33) is provided with a through hole penetrating through two ends, two ends of the sealing assembly (33) are respectively connected with the operating mechanism (1) and the bottom plate (43), the sealing rod (34) penetrates through the through hole and can move linearly along the axis of the through hole, one end of the sealing rod (34) is connected with the fixing piece (41), and the other end of the sealing rod (34) is connected with the operating mechanism (1) through the transmission joint (35).

4. A fast grounding switch as in claim 3, wherein: the groove is a groove with two open ends, and a guide sleeve is arranged in the groove; the sealing assembly (33) is composed of a plurality of sealing elements, and the transmission joint (35) is a transmission joint (35) with adjustable length.

5. A fast grounding switch as in claim 1, wherein: the device also comprises a housing; the shell and the operating mechanism (1) are respectively fixed on two sides of a bottom plate (43) of the guide assembly, the operating mechanism (1) is connected to one side of the bottom plate (43) through a support frame (11), the shell is fixed on the other side of the bottom plate (43) in a sealing mode, and the moving contact assembly and the fixed contact (2) are sealed in the shell.

6. A fast grounding switch as in claim 1, wherein: the moving contact (31) is a three-phase moving contact, the static contact (2) is a three-phase static contact (2), one side of the insulating plate (32) close to the static contact (2) protrudes outwards to form three bulges so that the insulating plate (32) is integrally shaped like a Chinese character 'shan', and each moving contact (31) of the three-phase moving contacts is correspondingly arranged on one bulge.

7. A fast grounding switch as in claim 1, wherein: the moving contact component also comprises a shielding ring (36) for shielding an electric field, and the shielding ring (36) is fixedly arranged between the moving contact (31) and the static contact (2); when the switch is switched on, the moving contact (31) penetrates through the shielding ring (36) to be matched with the static contact (2); when the brake is switched off, the moving contact (31) is disengaged from the static contact (2), and the end part of the moving contact (31) corresponds to the shielding ring (36).

8. A fast grounding switch as in claim 2, wherein: the grounding device is characterized by further comprising a grounding leading-out terminal (5), wherein the connecting end of the grounding leading-out terminal (5) is connected with the moving contact (31) through a flexible connecting piece (6), a short-circuit flow guide bar (53) is arranged at the grounding end of the grounding leading-out terminal (5), and the short-circuit flow guide bar (53) is connected with a grounding copper bar (7) to achieve grounding.

9. A fast grounding switch as in claim 8, wherein: a through hole is formed in the bottom plate (43), one end of the grounding leading-out terminal (5) is fixedly arranged on the bottom plate (43) of the guide assembly to serve as a grounding end, the other end of the grounding leading-out terminal (5) penetrates through the through hole to serve as a connecting end, and the connecting end is provided with an installation plate; the flexible connecting piece (6) is U-shaped, one end of the flexible connecting piece (6) is connected with the moving contact (31), and the other end of the flexible connecting piece is connected with the grounding leading-out terminal (5) through the mounting plate.

10. A fast grounding switch as in claim 9, wherein: the mounting plate comprises a pressure plate (51) and a transition mounting plate (52), and one end of the flexible connecting piece (6) is fixed between the pressure plate (51) and the transition mounting plate (52); the shielding ring (36) is mounted on the pressure plate (51), the shielding ring (36) is mounted at the end part of the pressure plate (51) in a cantilever manner, the central axis of the shielding ring (36) is coincided with the central axis of the moving contact (31), and the shielding ring (36) corresponds to the end part of the moving contact (31) during opening.