CN110993396A

CN110993396A - Auxiliary switch device for grounding switch and grounding switch comprising same

Info

Publication number: CN110993396A
Application number: CN201910938226.9A
Authority: CN
Inventors: 王玉军; 王腊洪; 王世峰
Original assignee: Eaton Electrical Equipment Co Ltd
Current assignee: Eaton Electrical Equipment Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-04-10
Anticipated expiration: 2039-09-30
Also published as: CN110993396B

Abstract

The present invention provides an auxiliary switch device for a ground switch and a ground switch including the same, the ground switch including a rotation shaft, the auxiliary switch device including: an auxiliary switch operating part sleeved on the rotating shaft; a closing indication switch and an opening indication switch which are arranged in a direction parallel to the axis of the rotary shaft and are provided opposite to the auxiliary switch operation part; when the grounding switch is switched on, the auxiliary switch operating part operates the switching-on indicating switch and the switching-off indicating switch to be respectively switched on and off, and when the grounding switch is switched off, the auxiliary switch operating part operates the switching-on indicating switch and the switching-off indicating switch to be respectively switched off and on. The auxiliary switch device can accurately indicate or detect the closing state and the opening state of the grounding switch.

Description

Auxiliary switch device for grounding switch and grounding switch comprising same

Technical Field

The invention relates to an earthing switch, in particular to an auxiliary switch device for an earthing switch and an earthing switch comprising the same.

Background

An earthing switch is a mechanical switch that grounds an electrical circuit. The grounding device is used for grounding high-voltage equipment and protecting personal safety when the high-voltage equipment and lines thereof are overhauled. The grounding switch mainly comprises a rotating shaft, a moving contact fixed on the rotating shaft and a static contact corresponding to the moving contact. When the moving contact is separated from the fixed contact by operating the rotating shaft, the grounding switch is in a brake-off state or a brake-off position; when the moving contact is contacted with the fixed contact by operating the rotating shaft, the grounding switch is in a closing state or a closing position.

The switching state of an auxiliary switch connected to a low-voltage circuit or a weak-current circuit is generally adopted in the prior art to judge the switching state of an earthing switch. In the process of operating the rotation shaft of the grounding switch, the rotation shaft is caused to switch the on-off state of the auxiliary switch. For example, when the grounding switch is in a closed state, the rotation shaft makes the auxiliary switch in a conductive (or "closed") state. When the grounding switch is in the open state, the rotating shaft makes the auxiliary switch in the open (or disjunction) state.

Because the auxiliary switch is electrically connected in the low-voltage or weak-current circuit, only when the auxiliary switch is in a conducting state, the control device can detect the electric signal in the auxiliary switch and directly judge that the grounding switch is in a closing state. When the auxiliary switch is in the off state, the control device cannot detect the electric signal in the auxiliary switch, so that the grounding switch cannot be directly judged to be in the opening state.

In addition, the switching state of the auxiliary switch in the related art may not coincide with the switching state of the ground switch. For example, when the rotating shaft drives the movable contact to move from the open position to the closed position, the auxiliary switch may be switched from the off state to the on state in advance. That is, the auxiliary switch has been switched to the conducting state while the grounding switch is still in the open position. At this time, the control device will erroneously determine that the grounding switch is already in the closed state, thereby causing a danger.

Disclosure of Invention

In view of the above technical problems in the prior art, an embodiment of the present invention provides an auxiliary switch device for a grounding switch, the grounding switch including a rotating shaft, the auxiliary switch device including:

an auxiliary switch operating part sleeved on the rotating shaft;

a closing indication switch and an opening indication switch which are arranged in a direction parallel to the axis of the rotary shaft and are provided opposite to the auxiliary switch operation part;

when the grounding switch is switched on, the auxiliary switch operating part operates the switching-on indicating switch and the switching-off indicating switch to be respectively switched on and off, and when the grounding switch is switched off, the auxiliary switch operating part operates the switching-on indicating switch and the switching-off indicating switch to be respectively switched off and on.

Preferably, the auxiliary switch operating part includes: the shaft sleeve is sleeved on the rotating shaft; a switching-on switching part sleeved on the shaft sleeve; the opening switching part is sleeved on the shaft sleeve; the closing indicating switch comprises a closing operation part which is arranged opposite to the closing switching part; the opening indicating switch comprises an opening operation part which is arranged opposite to the opening switching part; when the grounding switch is switched on, the switching-on switching part presses the switching-on operating part to enable the switching-on indicating switch to be switched on, and the switching-off switching part is separated from the switching-off operating part; and when the grounding switch is switched off, the switching-on switching part is separated from the switching-on operating part, and the switching-off switching part presses the switching-off operating part to enable the switching-off indicating switch to be switched on.

Preferably, the opening operation part is in a rod shape, one end of the opening operation part is pivotally connected with the shell of the opening indication switch, and the other end of the opening operation part is used for rotating along a first rotating direction under the pressing of the opening switching part; the switching-on operation part is in a rod shape, one end of the switching-on operation part is pivotally connected with the shell of the switching-on indication switch, and the other end of the switching-on operation part is pressed by the switching-on switching part to rotate along a second rotating direction; wherein the second rotational direction is opposite the first rotational direction.

Preferably, the switching-on switching part comprises an annular switching-on switching plate and an arc-shaped switching-on protrusion located on the outer side wall of the switching-on switching plate; the opening switching part comprises an annular opening switching plate and an arc opening protrusion located on the outer side wall of the opening switching plate, and the opening protrusion and the closing protrusion are located on two opposite sides of the rotating shaft.

Preferably, when the grounding switch is in a switching-off process, the switching-off protrusion rotates in the second rotating direction so that the other end of the switching-off operating part rotates in the first rotating direction, and simultaneously the switching-on protrusion releases the switching-on operating part so that the switching-on operating part rotates in the first rotating direction; and when the grounding switch is in a closing process, the closing protrusion rotates along the first rotating direction to enable the other end of the closing operation part to rotate along the second rotating direction, and meanwhile, the opening protrusion releases the opening operation part to enable the opening operation part to rotate along the second rotating direction.

Preferably, the earthing switch includes a frame plate, a fixing plate fixed to the frame plate, and two support plates having through holes, the rotation shaft passes through the through holes of the support plates and fixes the auxiliary switch operating part between the two support plates, and the closing indication switch and the opening indication switch are fixed to the fixing plate.

Preferably, when the ground switch is in a closed state, a portion of the closing protrusion remote from the frame plate presses the other end of the closing operation part to turn on the closing indication switch, and when the ground switch is in an open state, a portion of the opening protrusion near the frame plate presses the other end of the opening operation part to turn on the opening indication switch.

Preferably, the other end of the closing operation part has a closing roller, and the other end of the opening operation part has an opening roller, wherein when the ground switch is in a closing state, a portion of the closing protrusion away from the frame plate is tangent to the closing roller, and when the ground switch is in an opening state, a portion of the opening protrusion close to the frame plate is tangent to the opening roller.

Preferably, the outer side wall of the closing switching plate is provided with a positioning groove, the outer side wall of the opening switching plate is provided with a positioning groove, and the positioning groove of the closing switching plate and the positioning groove of the opening switching plate are arranged along a direction parallel to the axis of the rotating shaft.

Preferably, the inside wall of axle sleeve with the outside wall adaptation of rotation axis, the outside wall of axle sleeve has a locating plane, close a floodgate switching part's inside wall with the inside wall of separating brake switching part have with the contact plane of locating plane laminating mutually.

Preferably, the outer side walls of the two end portions of the shaft sleeve are provided with two clamping grooves, and the auxiliary switch operation portion comprises two clamping rings clamped in the two clamping grooves, a spacing sleeve sleeved on the shaft sleeve and two fixing sleeves sleeved on the two end portions of the shaft sleeve.

The present invention also provides a grounding switch, comprising:

a frame plate;

a rotating shaft fixed to the frame plate;

a moving contact fixed on the rotating shaft;

the static contact corresponds to the moving contact; and

such as the auxiliary switching device described above.

The auxiliary switch device can accurately indicate or detect the closing state and the opening state of the grounding switch; the switching-on indicating switch and the switching-off indicating switch cannot be switched in advance, the switching state of the switching-on indicating switch and the switching-off indicating switch is consistent with the switching state of the grounding switch, and the switching is sensitive and high in reliability; the installation is convenient and simple, and the relative position relation among all the parts does not need to be adjusted after the assembly is finished.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

fig. 1 is a perspective view illustrating an auxiliary switching device according to a preferred embodiment of the present invention mounted on a frame plate of an earthing switch in a closing state.

Fig. 2 is an exploded view of the auxiliary switching device shown in fig. 1.

Fig. 3 is a schematic perspective view of a closing instruction switch and an opening instruction switch in the auxiliary switching device shown in fig. 2.

Fig. 4 is an enlarged perspective view of the bushing, the snap ring, the closing switching part, and the opening switching part shown in fig. 2.

Fig. 5 is a schematic plan view of the sleeve shown in fig. 4 viewed in the axial direction thereof.

Fig. 6 is a schematic plan view of the auxiliary switching device shown in fig. 1, viewed in the direction indicated by the arrow B1.

Fig. 7 is a schematic plan view of the auxiliary switching device shown in fig. 6 with the opening indication switch and the corresponding opening switching part removed.

Fig. 8 is a perspective view of the auxiliary switching device shown in fig. 1 mounted on a frame plate of an earthing switch in an open state.

Fig. 9 is a schematic plan view of the auxiliary switching device shown in fig. 8, viewed in the direction indicated by the arrow B1.

Fig. 10 is a schematic plan view of the auxiliary switching device shown in fig. 9 with a closing instruction switch and a corresponding closing switching portion removed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by embodiments with reference to the accompanying drawings.

Fig. 1 is a perspective view illustrating an auxiliary switching device according to a preferred embodiment of the present invention mounted on a frame plate of an earthing switch in a closing state. For the sake of simplicity of illustration, fig. 1 does not show the moving contact, the stationary contact and the operating mechanism for operating the moving contact in the earthing switch, which are the same as those in the prior art. As shown in fig. 1, the earthing switch 1 comprises a frame plate 11,

support plates

12, 13 fixed to the frame plate 11, a fixing plate 14 fixed to the frame plate 11, a rotary shaft 15 fixed to the

support plates

12, 13, wherein the rotary shaft 15 has an axis L parallel to the frame plate 11; and an auxiliary switching device 200 fixedly connected to the frame plate 11.

The auxiliary switch device 200 includes an auxiliary switch operating part 2 fitted over the rotation shaft 15 and located between the

support plates

12 and 13;

closing indication switches

31, 32, 33 and

opening indication switches

34, 35, 36 arranged in sequence in a direction parallel to the axis L; and

fixing rods

41 and 42, wherein the

fixing rods

41 and 42 are fixed on the fixing plate 14 after passing through the

opening indicating switches

36, 35 and 34 and the

closing indicating switches

33, 32 and 31. The closing instruction switches 31, 32, and 33 and the

opening instruction switches

34, 35, and 36 are provided opposite to the auxiliary switch operating unit 2, and the auxiliary switch operating unit 2 is capable of rotating around the axis L together with the rotating shaft 15 to operate the switching states of the

closing instruction switches

31, 32, and 33 and the

opening instruction switches

34, 35, and 36.

Fig. 2 is an exploded view of the auxiliary switching device shown in fig. 1. As shown in fig. 2, the auxiliary switch operating unit 2 includes a boss 20, and a snap ring 271, a fixed sleeve 281, a closing switching unit 21, a spacer sleeve 282, a closing switching unit 22, a spacer sleeve 283, a closing switching unit 23, a spacer sleeve 284, an opening switching unit 24, a spacer sleeve 285, an opening switching unit 25, a spacer sleeve 286, an opening switching unit 26, a fixed sleeve 287, and a snap ring 272 that are sequentially fitted on the boss 20 in a direction indicated by an arrow B1. Wherein the

fixing sleeves

281 and 287 have the same shape and structure and the

spacing sleeves

282, 283, 284, 285, 286 have the same shape and structure.

The closing instruction switches 31, 32, and 33 are aligned with the

closing switching parts

21, 22, and 23, respectively, in a direction perpendicular to the axis L, and the

opening instruction switches

34, 35, and 36 are aligned with the

opening switching parts

24, 25, and 26, respectively, in a direction perpendicular to the axis L.

Fig. 3 is a schematic perspective view of a closing instruction switch and an opening instruction switch in the auxiliary switching device shown in fig. 2. Since the arrangement directions of the closing indication switches 31, 32, 33 are the same and the arrangement directions of the

opening indication switches

34, 35, 36 are the same, fig. 3 shows only one closing indication switch 33 and opening indication switch 36.

As shown in fig. 3, the closing instruction switch 33 is in a conductive state, and includes a housing 330 and a rod-shaped closing operation part 331, one end of the closing operation part 331 is pivotally connected to the housing 330, and the other end thereof is provided with a roller 3311. The closing switching unit 23 (see fig. 2) presses the closing operation unit 331 to turn on the closing instruction switch 33. When the closing switching unit 23 moves away from the closing operation unit 331, the closing operation unit 331 is not subjected to the external force, and the other end thereof is rotated in the rotation direction indicated by the arrow C1, so that the closing instruction switch 33 is switched from the on state to the off state. The opening indicating switch 36 is in an off state, and includes a housing 360 and a rod-shaped opening operating portion 361, wherein one end of the opening operating portion 361 is pivotally connected to the housing 360, and a roller 3611 is disposed on the other end thereof. When the opening switching portion 26 (see fig. 2) contacts and presses the opening operating portion 361, the opening operating portion 361 is rotated in the rotating direction indicated by the arrow C1, whereby the opening indicating switch 36 is switched from the off state to the on state.

Fig. 4 is an enlarged perspective view of the bushing, the snap ring, the closing switching part, and the opening switching part shown in fig. 2. As shown in fig. 4, the sleeve 20 is generally tubular, and has an outer sidewall with a positioning plane 201 and a positioning plane 202 (only one side is shown in fig. 3) disposed opposite to each other. The outer side walls of two opposite ends of the shaft sleeve 20 are respectively provided with a clamping groove 203 and a clamping groove 204 in the shape of circular arc.

The snap ring 271 and the snap ring 272 have the same shape and structure, and the snap ring 271 will be described here only as an example. The snap ring 271 is substantially annular and has a notch 2711. The snap ring 271 is made of a metal material and is configured to have a certain elasticity. When the snap ring 271 is in a natural state without being subjected to an external force, the inner diameter of the snap ring 271 is smaller than the outer diameter of the shaft sleeve 20. When the gap 2711 of the snap ring 271 is expanded by an operator, the inner diameter of the snap ring 271 can be slightly larger than the outer diameter of the shaft sleeve 20 and can be placed on the clamping groove 203 of the shaft sleeve 20; after the force applied to the snap ring 271 is removed, the snap ring 271 will be securely snapped into the snap groove 203. Likewise, snap ring 272 may be snapped into snap groove 204.

The arrangement directions of the

closing switching parts

21, 22, and 23 are the same, and the arrangement directions of the

opening switching parts

24, 25, and 26 are the same, and fig. 4 shows only one closing switching part 23 and opening switching part 26 for simplifying the drawing. As shown in fig. 4, the closing switch 23 has a substantially circular ring-shaped plate shape, and includes a circular ring-shaped closing switch plate 230 and a closing protrusion 233 located on an outer side wall of the closing switch plate 230, and the closing protrusion 233 has an arc shape and may be regarded as a part of another circular ring concentric with the closing switch plate 230. The outer side wall of the closing switch plate 230 has a positioning groove 234, and the inner side wall thereof has a contact plane 231 and a contact plane 232, wherein the contact plane 231 and the contact plane 232 are respectively used for being attached to or closely contacted with the positioning plane 201 and the positioning plane 202 of the shaft sleeve 20.

Also, the opening switching part 26 has a substantially circular ring-shaped plate shape, and includes a circular ring-shaped closing switching plate 260 and a closing protrusion 263 located on an outer side wall of the closing switching plate 260, and the closing protrusion 263 has an arc shape, which may be regarded as a part of another circular ring concentric with the closing switching plate 260. The outer side wall of the closing switch plate 260 has a positioning groove 264, and the inner side wall thereof has a contact plane 261 and a contact plane 262, wherein the contact plane 261 and the contact plane 262 are respectively used for being attached to or closely contacted with the positioning plane 201 and the positioning plane 202 of the shaft sleeve 20.

The

positioning grooves

234 and 264 are arranged in a direction parallel to the axis L of the rotary shaft 15. In the installation process, the positioning grooves of the

closing switching parts

21, 22 and 23 and the

opening switching parts

24, 25 and 26 are aligned one by one along the direction of the axis L, so that accurate installation can be realized, and wrong installation is avoided.

The closing protrusion 233 and the opening protrusion 263 are located at opposite sides of the rotation shaft 15 (or the bushing 20). When the closing protrusion 233 presses or contacts the closing operation part 331 (shown in fig. 3) of the closing indication switch 33 to turn on the closing indication switch 33, the opening protrusion 263 is away from the opening operation part 361 of the opening indication switch 36. And when the opening protrusion 263 presses or contacts the opening operation part 361 of the opening indication switch 36 to turn on the opening indication switch 36 after the shaft sleeve 20 rotates by a certain angle along the rotation direction indicated by the arrow C2, the closing protrusion 233 is far away from the closing operation part 331 of the closing indication switch 33.

Fig. 5 is a schematic plan view of the sleeve shown in fig. 4 viewed in the axial direction thereof. As shown in fig. 5, the inner sidewall 205 of the sleeve 20 is adapted to the shape of the outer sidewall of the rotating shaft 15 and defines a receiving space in the shape of a hexagonal prism for tightly fitting over the rotating shaft 15 and forming a tight fit connection with the rotating shaft 15.

The procedure of mounting or assembling the auxiliary switch operating part 2 of the present invention will be described below with reference to fig. 1 to 2. Firstly, the fixed sleeve 281, the closing switching part 21, the spacing sleeve 282, the closing switching part 22, the spacing sleeve 283 and the closing switching part 23 are sequentially sleeved on the shaft sleeve 20, so that the positioning grooves of the

closing switching parts

21, 22 and 23 are aligned; then, the spacer sleeve 284, the opening switching part 24, the spacer sleeve 285, the opening switching part 25, the spacer sleeve 286, the opening switching part 26, and the fixing sleeve 287 are sequentially fitted over the sleeve 20, and the positioning grooves of the

opening switching parts

24, 25, and 26 are aligned. Next, the sleeve 20 is placed between the

support plates

12, 13 such that both end portions of the sleeve 20 pass through the through holes of the

support plates

12, 13, respectively. Finally, the snap rings 271 and 272 are engaged with the

snap grooves

203 and 204, respectively, so that the auxiliary switch operating unit 2 is fixed to the

support plates

12 and 13, and the relative positional relationship between the

closing switching units

21, 22 and 23 and the

opening switching units

24, 25 and 26 and the sleeve 20 is maintained.

Fig. 6 is a schematic plan view of the auxiliary switching device shown in fig. 1, viewed in the direction indicated by the arrow B1. Fig. 6 shows only the closing operation part 331 and the closing protrusion 233, the opening protrusion 263 on the opening switching part 26, the opening indication switch 36 and the opening operation part 361 thereof, which are arranged oppositely.

As shown in fig. 6, the closing protrusion 233 is located on one side of the rotating shaft 15, and presses or contacts the closing operation part 331 of the closing indication switch 33 to turn on the closing indication switch 33, while the opening protrusion 263 of the opening switching part 26 is located on the other side of the rotating shaft 15, and is away from the opening indication switch 36 and the opening operation part 361 thereof, so that the opening indication switch 36 is in an off state. The control device (not shown in fig. 6) detects an electric signal in the closing instruction switch 33, thereby determining that the earthing switch is in the closed state.

Fig. 7 is a schematic plan view of the auxiliary switching device shown in fig. 6 with the opening indication switch and the corresponding opening switching part removed. As shown in fig. 7, the pivot 332 on the closing operation part 331 is close to the frame plate 11, and the roller 3311 is far from the frame plate 11. The closing protrusion 233 of the closing switching part 23 presses the roller 3311 of the corresponding closing indication switch 33, so that the closing indication switch 33 is in a conductive state. A portion of the closing protrusion 233 away from the frame plate 11 presses the roller 3311 and is tangent to the outer side surface of the roller 3311. Since the roller 3311 is pressed by a portion of the closing protrusion 233 which is distant from the frame plate 11, when the ground switch 1 is shaken to cause a small shift in the position of some component (e.g., the rotation shaft 15 or the closing indication switch 33), a portion of the closing protrusion 233 which is close to the frame plate 11 can block or restrict the clockwise rotational movement of the closing operation part 331, thereby enabling the closing indication switch 33 to be reliably kept on, thereby accurately indicating that the ground switch 1 is in the closed state.

If the grounding switch 1 needs to be opened at this time, the rotating shaft 15 is operated to rotate in the rotating direction indicated by the arrow C2 (counterclockwise in fig. 7), and the rotating shaft 15 drives or drives the closing switch 23 and the closing protrusion 233 thereon to rotate counterclockwise. Since the closing protrusion 233 at the side away from the frame plate 11 has no component for pressing the roller 3311, the closing operation part 331 rotates clockwise about the pivot 332 while the closing protrusion 233 rotates counterclockwise, so that the closing switching part 23 and the closing operation part 331 rotate in opposite rotation directions synchronously, and the situation that the closing switching part 23 rotates counterclockwise by a certain angle while the closing operation part 331 remains stationary or substantially stationary is avoided. Therefore, the sensitivity of the closing indication switch 33 is improved, which is beneficial to accurately detecting the switch state of the grounding switch 1.

Fig. 8 is a perspective view of the auxiliary switching device shown in fig. 1 mounted on a frame plate of an earthing switch in an open state. As shown in fig. 8, the closing

protrusions

213, 223, 233 of the

closing switching parts

21, 22, 23 are located on one side of the rotating shaft 15, and the opening protrusions (not shown in fig. 8) of the

opening switching parts

24, 25, 26 are located on the other side opposite to the rotating shaft 15. Specifically, the closing

protrusions

213, 223, 233 of the

closing switching parts

21, 22, 23 are separated from the closing operation parts of the closing instruction switches 31, 32, 33, and thus the closing instruction switches 31, 32, 33 are in the off state. The opening projections of the

opening switching parts

24, 25, 26 contact or press the opening operation parts of the opening indication switches 34, 35, 36, whereby the opening indication switches 34, 35, 36 are in the on state. The control device can accurately judge that the grounding switch 1 is in the open state through the

open indicating switches

34, 35 and 36 in the on state.

Fig. 9 is a schematic plan view of the auxiliary switching device shown in fig. 8, viewed in the direction indicated by the arrow B1. Fig. 10 is a schematic plan view of the auxiliary switching device shown in fig. 9 with a closing instruction switch and a corresponding closing switching portion removed. As shown in fig. 9 and 10, when the grounding switch 1 is in the open state, the closing protrusion 233 of the closing switching portion 23 is away from the closing operation portion 331 of the closing indication switch 33, and the opening protrusion 263 of the opening switching portion 26 presses the roller 3611 of the corresponding opening operation portion 361, so that the opening indication switch 36 is in the on state.

A portion of the opening protrusion 263 adjacent to the frame plate 11 presses the roller 3611 and is tangent to an outer side surface of the roller 3611. Since the roller 3611 is pressed by a portion of the opening protrusion 263 close to the frame plate 11, when the ground switch 1 vibrates to cause a small deviation in the position of some component (e.g., the rotating shaft 15 or the opening indication switch 363), a portion of the opening protrusion 263 away from the frame plate 11 can block or restrict the counterclockwise rotational movement of the opening operation part 361, thereby reliably keeping the closing indication switch 36 on, and accurately indicating that the ground switch 1 is in the open state.

If the grounding switch 1 needs to be turned on at this time, the rotating shaft 15 is operated to rotate in the rotating direction indicated by the arrow C1 (clockwise in fig. 10), and the rotating shaft 15 drives or drives the opening switching part 26 and the opening protrusion 263 thereon to rotate clockwise. Since the opening protrusion 263 has no component on the side close to the frame plate 11 to press the roller 3611, the opening operating part 361 rotates counterclockwise around the pivot 362 while the opening protrusion 263 rotates clockwise, so that the opening switching part 26 and the opening operating part 361 rotate in opposite rotation directions synchronously, and the situation that the opening switching part 26 rotates clockwise by a certain angle while the opening operating part 361 remains stationary or substantially stationary is avoided. Therefore, the sensitivity of the opening indicating switch 36 is improved, which is beneficial to accurately detecting the switch state of the grounding switch 1.

In the process of switching the grounding switch 1 from the opening state shown in fig. 9 to the closing state shown in fig. 6, the rotating shaft 15 rotates in the direction indicated by the arrow C1 (clockwise in fig. 9) to drive the closing switching part 23 to move clockwise, so that the closing protrusion 233 first contacts the closing operation part 331 of the closing indication switch 33, then gradually presses the corresponding closing operation part 331 to make it rotate counterclockwise, and finally makes the closing operation part 331 of the closing indication switch 33 be at the position shown in fig. 6, and the grounding switch 1 just makes the closing indication switch 33 be turned on when being at the closing position. In this process, the switching states of the closing indication switch 33 and the grounding switch 1 are always kept consistent.

In the process of switching the earthing switch 1 from the closing state shown in fig. 6 to the opening state shown in fig. 9, the rotating shaft 15 rotates in the direction indicated by the arrow C2 (counterclockwise in fig. 6), and drives the opening switching part 26 to move counterclockwise, so that the opening protrusion 263 first contacts the opening operating part 361 of the opening indicating switch 36, and then gradually presses the corresponding opening operating part 361 to make clockwise rotation, and finally makes the opening operating part 361 of the opening indicating switch 36 be in the position shown in fig. 9, and the earthing switch 1 just makes the opening indicating switch 36 be turned on when being in the opening position. In the process, the switching states of the opening indicating switch 36 and the grounding switch 1 are always consistent.

The auxiliary switching device 200 can directly detect the closing state and the opening state of the earthing switch 1, and the on states of the closing indication switches 31, 32, 33 accurately correspond to the closing position of the earthing switch 1, and the on states of the opening indication switches 34, 35, 36 accurately correspond to the opening position of the earthing switch 1.

The rotation direction of the closing switching part of the auxiliary switch operating part 2 is opposite to that of the closing operating part of the corresponding closing indicating switch, and the rotation direction of the opening switching part is opposite to that of the opening operating part of the corresponding opening indicating switch. On one hand, the corresponding closing operation part and the corresponding opening operation part are respectively pressed by the closing switching part and the opening switching part; on the other hand, the on state of the closing indication switch and the off state of the opening indication switch are made to accurately coincide with the closing state and the opening state of the earthing switch 1, respectively, thereby accurately indicating or detecting the switching state of the earthing switch 1.

The auxiliary switch operating part 2 of the auxiliary switching device 200 is fixed to the frame plate 11 through the support plate, and the closing indication switches 31, 32, 33 and the opening indication switches 34, 35, 36 are fixed to the frame plate 11 through the fixing plate 14, whereby the auxiliary switching device 200 constitutes an integral part fixed to the frame plate 11, and it is not necessary to adjust the relative positional relationship of the parts therein after the assembly of the auxiliary switching device 200 is completed.

In other embodiments of the present invention, the inner sidewall of the sleeve 20 may have any other shape as long as it can be sleeved on the rotating shaft 15 and can rotate simultaneously under the driving of the rotating shaft 15.

In other embodiments of the present invention, the closing indication switch and the opening indication switch may be various types of switches such as a contact switch or a normally open button switch.

The present invention is not intended to limit the number of closing indication switches and opening indication switches in the auxiliary switching device. In another embodiment of the invention, the switch comprises a closing indication switch and a corresponding closing switching part, and a switching-off indication switch and a corresponding switching-off switching part.

The fixed sleeve, the spacer sleeve and the snap ring of the present invention are used to keep the relative position relationship between the closing switching part and the opening switching part and the shaft sleeve 20 unchanged.

Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.

Claims

1. An auxiliary switching device for an earthing switch, said earthing switch comprising a rotating shaft, characterized in that said auxiliary switching device comprises:

an auxiliary switch operating part sleeved on the rotating shaft;

2. Auxiliary switching device according to claim 1,

the auxiliary switch operation part includes:

the shaft sleeve is sleeved on the rotating shaft;

a switching-on switching part sleeved on the shaft sleeve; and

the opening switching part is sleeved on the shaft sleeve;

the closing indicating switch comprises a closing operation part which is arranged opposite to the closing switching part;

the opening indicating switch comprises an opening operation part which is arranged opposite to the opening switching part;

when the grounding switch is switched on, the switching-on switching part presses the switching-on operating part to enable the switching-on indicating switch to be switched on, and the switching-off switching part is separated from the switching-off operating part; and when the grounding switch is switched off, the switching-on switching part is separated from the switching-on operating part, and the switching-off switching part presses the switching-off operating part to enable the switching-off indicating switch to be switched on.

3. The auxiliary switch device according to claim 2, wherein the opening operation portion is in a rod shape, one end of which is pivotally connected to the housing of the opening indication switch, and the other end of which is adapted to be rotated in a first rotational direction by being pressed by the opening switching portion; the switching-on operation part is in a rod shape, one end of the switching-on operation part is pivotally connected with the shell of the switching-on indication switch, and the other end of the switching-on operation part is pressed by the switching-on switching part to rotate along a second rotating direction; wherein the second rotational direction is opposite the first rotational direction.

4. The auxiliary switching device according to claim 3, wherein the closing switching part includes a ring-shaped closing switching plate and a curved closing protrusion located on an outer side wall of the closing switching plate; the opening switching part comprises an annular opening switching plate and an arc opening protrusion located on the outer side wall of the opening switching plate, and the opening protrusion and the closing protrusion are located on two opposite sides of the rotating shaft.

5. The auxiliary switching device according to claim 4, wherein when the grounding switch is in an opening process, the opening protrusion rotates in the second rotating direction to rotate the other end of the opening operation part in the first rotating direction, and simultaneously the closing protrusion releases the closing operation part to rotate in the first rotating direction; and when the grounding switch is in a closing process, the closing protrusion rotates along the first rotating direction to enable the other end of the closing operation part to rotate along the second rotating direction, and meanwhile, the opening protrusion releases the opening operation part to enable the opening operation part to rotate along the second rotating direction.

6. The auxiliary switching device according to claim 4, wherein the earthing switch includes a frame plate, a fixing plate fixed to the frame plate, and two support plates having through holes, the rotating shaft passes through the through holes of the support plates and fixes the auxiliary switch operating part between the two support plates, and the closing indication switch and the opening indication switch are fixed to the fixing plate.

7. The auxiliary switching device according to claim 6, wherein when the ground switch is in a closed state, a portion of the closing protrusion remote from the frame plate presses the other end of the closing operation part to turn on the closing indication switch, and when the ground switch is in an open state, a portion of the opening protrusion near the frame plate presses the other end of the opening operation part to turn on the opening indication switch.

8. The auxiliary switching device according to claim 7, wherein the other end of the closing operation part has a closing roller, and the other end of the opening operation part has an opening roller, wherein a portion of the closing protrusion, which is away from the frame plate, is tangent to the closing roller when the earthing switch is in a closing state, and a portion of the opening protrusion, which is close to the frame plate, is tangent to the opening roller when the earthing switch is in an opening state.

9. The auxiliary switching device according to any one of claims 4 to 8, wherein the closing switch plate has a positioning groove on an outer side wall thereof, the opening switch plate has a positioning groove on an outer side wall thereof, and the positioning groove of the closing switch plate and the positioning groove of the opening switch plate are arranged in a direction parallel to an axis of the rotating shaft.

10. The auxiliary switching device as claimed in any one of claims 2 to 8, wherein an inner sidewall of the bushing is fitted to an outer sidewall of the rotating shaft, the outer sidewall of the bushing has a positioning plane, and an inner sidewall of the closing switching part and an inner sidewall of the opening switching part have a contact plane in contact with the positioning plane.

11. The auxiliary switching device as claimed in any one of claims 2 to 8, wherein the outer side walls of both end portions of the bushing have two catching grooves, and the auxiliary switch operating part includes two catching rings caught in the two catching grooves, a spacing sleeve fitted over the bushing, and two fixing sleeves fitted over both end portions of the bushing.

12. An earthing switch, comprising:

a frame plate;

a rotating shaft fixed to the frame plate;

a moving contact fixed on the rotating shaft;

the static contact corresponds to the moving contact; and

auxiliary switching device according to any one of claims 1 to 11.