CN219418811U

CN219418811U - High-voltage switch operating mechanism and high-voltage switch

Info

Publication number: CN219418811U
Application number: CN202320150555.9U
Authority: CN
Inventors: 王军
Original assignee: Hitachi Energy Switzerland AG
Current assignee: Hitachi Energy Co ltd
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2023-07-25
Anticipated expiration: 2033-01-28

Abstract

The present utility model relates to a high-voltage switch operating mechanism and a high-voltage switch. The high-voltage switch operating mechanism includes: a driving module; the output shaft is driven by the driving module to rotate so as to drive the switch body to realize opening and closing operation, and the output shaft is provided with first teeth; a cam provided with a second tooth meshing with the first tooth so that the cam moves with rotation of the output shaft; a plurality of drive arms, each drive arm configured to contact an outer contoured surface of a cam, wherein each drive arm is rotatable about a fixed rotational axis as the outer contoured surface moves as the cam moves; and a plurality of signal triggering components, each configured to trigger a signal representing a switch opening and closing position when the corresponding transmission arm rotates to a predetermined position. The high-voltage switch operating mechanism can simply realize the position monitoring of the output shaft, and has compact structure, smaller volume and lower cost.

Description

High-voltage switch operating mechanism and high-voltage switch

Technical Field

The utility model relates to the technical field of high-voltage switches. More particularly, the present utility model relates to a high voltage switch operating mechanism, and to a high voltage switch including such an operating mechanism.

Background

In order to realize the 'one-key' control of GIS (Gas-Insulated Switchgear-Gas-insulated metal-enclosed switchgear), the working positions of high-voltage switches such as isolating switches, grounding switches, isolating grounding switches, quick grounding switches and the like need to be double-confirmed. When the operating mechanism of the high-voltage switch reaches a switch-on position or a switch-off position, a signal is sent to operators on site. Current operating mechanisms display these signals through the use of auxiliary switches and/or travel switches (also known as microswitches). The auxiliary switch or travel switch may be driven/triggered by the mechanical drive train of the operating mechanism, but the triggering of the auxiliary switch or travel switch is generally independent of the output shaft of the operating mechanism, which means that if the drive train in the vicinity of the output shaft fails, the auxiliary switch or travel switch may still issue a "close" or "open" position signal. This is a safety risk even if the output shaft does not rotate. For example, if the main contacts of the isolation grounding switch are not properly opened by the output shaft of the operating mechanism, but the operating mechanism still sends a "break-off" signal, the high voltage may present a hazard to the field operator and destroy the power system.

In addition, travel switches have found wide application in high voltage products such as operating mechanisms for isolating/quick-ground switches. In prior designs, the triggering of the travel switch was accomplished directly by the cam, i.e., it was required to trigger based on the change in the outer profile and position of the cam, which required the cam to have a specific outer profile size and position. However, if the limitation of the internal installation space of the high-voltage switch operating mechanism and the secondary wiring space of the travel switch is taken into consideration, the size or the movement range of the cam may interfere with other components in the operating mechanism. In particular, for example, for an isolating earthing switch operating mechanism, it is necessary to provide two paths of signals independent of each other for the isolating switch portion and the earthing switch portion, which requires a special cam to be designed, even two layers of cams are required, and thus a mechanical transmission chain becomes very complicated, and the position of the travel switch needs to be precisely set according to the position of the cams. In this case, the internal space of the actuator needs to be enlarged to install the travel switch and the complicated mechanical transmission chain, which makes the actuator larger in size and higher in cost, and the large-sized actuator box may also bring about a collision for GIS layout design.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a high-voltage switch operating mechanism which can simply realize the position monitoring of an output shaft and has the advantages of compact structure, small volume and low cost.

To this end, a first aspect of the present utility model provides a high voltage switch operating mechanism comprising: a driving module; the output shaft is driven by the driving module to rotate so as to drive the switch body to realize opening and closing operation, and the output shaft is provided with first teeth; a cam provided with a second tooth meshing with the first tooth such that the cam moves with rotation of the output shaft; a plurality of drive arms, each of the plurality of drive arms configured to contact an outer contoured surface of the cam, wherein each of the plurality of drive arms is rotatable about a fixed rotational axis as the outer contoured surface moves as the cam moves; and a plurality of signal triggering components, each of the plurality of signal triggering components configured to trigger a signal representing a switch opening and closing position when the corresponding transmission arm rotates to a predetermined position.

According to an alternative embodiment of the utility model, each of the plurality of actuator arms comprises a first contact surface for contacting an outer contoured surface of the cam, the first contact surface being arcuate.

According to an alternative embodiment of the utility model, each of the plurality of signal triggering components is a mechanically pressed travel switch.

According to an alternative embodiment of the utility model, each of the plurality of actuator arms comprises a second contact surface pressing the corresponding travel switch, the second contact surface being a flat surface.

According to an alternative embodiment of the present utility model, the first teeth are configured as external gears and the second teeth are configured as internal gears such that the cam rotates with rotation of the output shaft.

According to an alternative embodiment of the utility model, the first tooth is configured as an external gear and the second tooth is configured as a rack such that the cam translates with rotation of the output shaft.

A second aspect of the present utility model provides a high-voltage switch comprising a switch body and a high-voltage switch operating mechanism according to the first aspect of the present utility model for driving the switch body to perform an opening/closing operation.

According to an alternative embodiment of the utility model, the high voltage switch is any one of a disconnector, a grounding switch, a disconnector grounding switch and a fast grounding switch.

According to an alternative embodiment of the present utility model, the high-voltage switch is an isolating earthing switch, and the high-voltage switch operating mechanism includes four transmission arms and four signal triggering parts configured to trigger signals representing an isolating switch closing position, an isolating switch opening position, an earthing switch closing position and an earthing switch opening position when the corresponding transmission arm rotates to a predetermined position, respectively.

Compared with the prior art, the high-voltage switch operating mechanism has a plurality of beneficial technical effects, in particular: the position change of the cam is indirectly transmitted to the travel switch through the transmission arm matched with the cam, so that the position of the output shaft of the operating mechanism can be transmitted and signals can be sent through a simple mechanical transmission chain, and the outer contour surface of the cam does not directly contact with the travel switch, so that the design of the cam is simplified, and the position of the travel switch in the operating mechanism can be set more independently, flexibly and conveniently; therefore, the operating mechanism of the utility model has simple structure, convenient assembly and lower cost, and can lay a good foundation for popularization and application of one-key sequential control operation.

Drawings

Other features and advantages of the present utility model will be better understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof.

Fig. 1 is a schematic perspective view of a signal triggering module of a high voltage switch operating mechanism according to one embodiment of the present utility model;

FIG. 2 is a schematic plan view of the signal triggering module of FIG. 1;

FIG. 3 is an enlarged schematic view of region A in FIG. 2;

fig. 4 is an enlarged schematic view of the region B in fig. 2.

It should be noted that the drawings are not only for the explanation of the utility model, but also for the limitation of the utility model if necessary.

Detailed Description

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the detailed description and the specific examples, while indicating specific ways of making and using the utility model, are given by way of illustration only and are not intended to limit the scope of the utility model.

In this specification, expressions indicating directions such as "clockwise", "counterclockwise", "left", "right", etc. are not absolute but relative when describing the structural positions of the respective components. When the individual components are arranged as shown in the figures, these expressions of indication direction are appropriate, but when the position of the individual components in the figures is changed, these expressions of indication direction should also be changed accordingly.

A preferred embodiment of the utility model is described below with the aid of fig. 1 to 4. It will be appreciated that the high voltage switch of the present utility model is an isolated earthing switch in this embodiment, which includes a switch body and an isolated earthing switch operating mechanism that drives the switch body to an operating position to effect an opening and closing operation, wherein the operating mechanism may trigger signals indicative of "the closing position of the isolating switch", "the opening position of the isolating switch", "the closing position of the earthing switch" and "the opening position of the earthing switch" depending on the operating position of the switch body.

Of course, the type of the high-voltage switch of the present utility model is not limited, and it may be any of a general disconnecting switch, a general grounding switch, a quick grounding switch, and the like, which have a plurality of operating positions.

As shown in fig. 1 and 2, the isolating earthing switch operating mechanism includes a driving module (not shown), a signal triggering module composed of an output shaft 10, a cam 20, four transmission arms 30 (also called crank arms), and four signal triggering parts.

The drive module may include, for example, a motor, reduction gear, clutch, etc. coupled to one another to drive operation of the other modules of the operating mechanism by a power source provided by the motor.

The output shaft 10 is driven by a driving module to rotate through a mechanical transmission chain so as to drive the switch body (particularly a switch contact) to move, thereby realizing opening and closing operation. In this context, unless explicitly specified and limited otherwise, a "mechanical drive train" is understood to include the usual components of a drive shaft, drive teeth, etc. for transmitting power to a mechanical module, which will not be described in detail herein.

The output shaft 10 is provided with first teeth 11, and the cam 20 is provided with second teeth 21 that mesh with the first teeth 11, so that the cam 20 can move with the rotation of the output shaft 10. In this embodiment, the first teeth 11 are configured as external gears fixed to the output shaft 10, and the second teeth 21 are configured as internal gears integrally formed on the cam 20 so that the cam 20 can rotate with the rotation of the output shaft 10 by the engagement of the internal and external gears.

According to a variant embodiment, not illustrated, the first tooth 11 may be configured as an external gear fixed to the output shaft 10, while the second tooth 21 may be configured as a linear rack integrally formed on the cam 20, so as to enable the cam 20 to translate with the rotation of the output shaft 10, through the meshing of the gear with the rack.

Each of these signal triggering means may be a mechanically pressed travel switch 40, for example comprising a first travel switch 401, a second travel switch 402, a third travel switch 403 and a fourth travel switch 404, shown arranged in sequence from left to right around the outer contour surface 22 of the cam 20, for triggering signals representing "disconnector switch-off position", "disconnector switch-on position", "earthing switch-on position" and "earthing switch-off position", respectively.

Each of the four driving arms 30 is capable of contacting the outer contour surface 22 of the cam 20 and rotating about the fixed rotation shaft 50 with the movement of the outer contour surface 22 when the cam 20 moves. In this embodiment, each of the four transmission arms 30 is held against the outer contour surface 22 of the cam 20 and is capable of rotating about the fixed rotation shaft 50 when the cam 20 moves and the outer contour surface 22 thereof changes in contour of the contact position with the transmission arm 30, so that each of the travel switches 40 triggers the above-described position signal indicating the switch on-off position when the corresponding transmission arm 30 rotates to a predetermined position. According to a variant of implementation, not illustrated, each of the four transmission arms 30 may be in an initial state free from contact with the external profile 22 of the cam 20 and able to rotate about the fixed rotation axis 50 when the cam 20 moves so that the transmission arm 30 comes into contact with the external profile 22, so that each travel switch 40 triggers the aforementioned position signal indicative of the switch opening/closing position when the corresponding transmission arm 30 rotates to a predetermined position.

In this embodiment, the four transmission arms 30 include a first transmission arm 301 for triggering a first travel switch 401, a second transmission arm 302 for triggering a second travel switch 402, a third transmission arm 303 for triggering a third travel switch 403, and a fourth transmission arm 304 for triggering a fourth travel switch 404.

This arrangement avoids direct contact and actuation of the travel switches 40 by the outer contour surface 22 of the cam 20, thus making it possible to simplify the structure of the cam 20 and to make the arrangement of the cam 20 and the travel switches 40 in the operating mechanism more independent and flexible.

More specifically, as shown in fig. 3 and 4, each of the travel switches 40 includes a protrusion 41 with a return spring, a resilient arm 42, and a driving head 43 at a free end of the resilient arm 42, and if the driving head 43 is depressed or sprung up by a certain stroke (for example, a stroke of about 2 mm), the protrusion 41 may be depressed or released to turn on or off an internal passage of the travel switch 40 to trigger an electrical signal.

The transmission arm 30 is a rigid member made of a metal or a non-metal material and is rotatable about a fixed rotation shaft 50 fixed in a housing of the operating mechanism, wherein the first transmission arm 301 and the fourth transmission arm 304 have a substantially linear elongated shape, and the second transmission arm 302 and the third transmission arm 303 have a substantially L-shaped shape. It will be appreciated that the shape of the actuator arms 30 is not limiting and may be designed according to the arrangement positions of the cams 20 and the travel switches 40.

In this embodiment, each transmission arm 30 comprises a first contact surface 31 for contacting the outer contour surface 22 of the cam 20, which first contact surface 31 is for example an arc-shaped surface, and each transmission arm 30 further comprises a second contact surface 32 for pressing the drive head 43 of the corresponding travel switch 40 for triggering a signal, which second contact surface 32 is for example a flat surface.

The return spring from the travel switch 40 provides a contact force between the cam 20 and the actuator arm 30 when the outer contoured surface 22 of the cam 20 contacts the first contact surface 31 of the actuator arm 30. As the cam 20 rotates, the first contact surface 31 of the actuator arm 30 remains in contact with the outer contoured surface 22 of the cam 20 and slides relatively over the outer contoured surface 22.

At this time, if the profile of the outer contour surface 22 of the cam 20 at the contact position with the transmission arm 30 is changed, for example, the cam 20 rotates to slide the first contact surface 31 of the transmission arm 30 from the circular arc surface 221 on the outer contour surface 22 to the concave portion 222 having a smaller radial dimension with respect to the circular arc surface 221 on the outer contour surface 22, the transmission arm 30 swings around the fixed rotation shaft 50 by a certain angle, so that the second contact surface 32 of the transmission arm 30 also moves correspondingly, and presses or releases the driving head 43 of the travel switch 40 by a certain travel. Thus, the travel switch 40 is triggered in the rotational movement of the transmission arm 30 due to the change in profile of the outer profile surface 22 of the cam 20.

In this embodiment, in the illustrated state, the first contact surfaces 31 of the four transmission arms 30 are all abutted against the circular arc surface 221 of the outer contour surface 22 of the cam 20, at this time, the first travel switch 401 triggers a signal indicating that the "disconnecting switch off position" is reached (i.e., the "disconnecting switch off" indicator light is on), the fourth travel switch 404 triggers a signal indicating that the "grounding switch off position" is reached (i.e., the "grounding switch off" indicator light is on), and the second travel switch 402 and the third travel switch 403 do not trigger signals (i.e., the "disconnecting switch on" and the "grounding switch on" indicator light is off).

At this time, when the switch body needs to be driven to realize the closing operation of the isolating switch, the driving module drives the output shaft 10 to rotate clockwise so as to drive the cam 20 to rotate clockwise.

When the cam 20 is rotated such that the first contact surface 31 of the first actuator arm 301 slides onto the recess 222 of the outer contour surface 22 of the cam 20, the first actuator arm 301 swings such that the second contact surface 32 thereof releases the drive head 43 of the first travel switch 401, whereby the "disconnector brake-off" indicator light is extinguished.

Thereafter, as the cam 20 continues to rotate such that the first contact surface 31 of the second actuator arm 302 slides onto the recess 222 of the outer contour surface 22 of the cam 20, the second actuator arm 302 swings such that its second contact surface 32 releases the drive head 43 of the second travel switch 402, whereupon the "on-off" indicator light is illuminated.

Similarly, in the illustrated state, when the switch body needs to be driven to implement the ground switch closing operation, the driving module drives the output shaft 10 to rotate counterclockwise to drive the cam 20 to rotate counterclockwise.

When the cam 20 rotates to such an extent that the first contact surface 31 of the fourth transmission arm 304 slides onto the recess 222 of the outer contour surface 22 of the cam 20, the fourth transmission arm 304 swings such that the second contact surface 32 thereof releases the driving head 43 of the fourth travel switch 404, and the "ground switch off" indicator light is thereby extinguished.

Thereafter, when the cam 20 continues to rotate so that the first contact surface 31 of the third transmission arm 303 slides onto the recess 222 of the outer contour surface 22 of the cam 20, the third transmission arm 303 swings so that the second contact surface 32 thereof releases the driving head 43 of the third travel switch 403, and the "ground switch on" indicator lamp is thereby turned on.

In summary, the present utility model has at least the following advantages:

1) By providing the actuator arm 30 between the cam 20 and the travel switch 40, the position setting of the travel switch 40 in the operating mechanism is made more flexible. In particular, the present utility model can simply transmit the rotational or translational movement of the cam 20 to the travel switch 40 in a limited space, making the position setting and wiring of the travel switch 40 more possible.

2) For high-voltage switches with more working positions, such as isolating earthing switches, the monitoring of four working positions ("isolating switch closing position", "isolating switch opening position", "earthing switch closing position" and "earthing switch opening position") can be realized by the operating mechanism of the utility model.

3) The driving arm 30 is simple to manufacture and low in cost, the shape of the driving arm 30 can be flexibly designed according to the positions of the cam 20 and the travel switch 40, and the working space of the driving arm 30 is flexible and compact, and the travel switch 40 can be effectively triggered only by slight displacement, so that the complex cam 20 with a special structure with larger design size and higher cost is not required.

4) If more signal triggering components (such as the travel switch 40) are required, the internal space of the operating mechanism is generally required to be increased, and in consideration of the wiring terminals, a great change is required to the existing layout, while the scheme of the utility model can utilize the existing limited space to increase the number of signal triggering components.

5) The triggering of the travel switch 40 is realized based on the rotation of the output shaft 10, and only when the output shaft 10 rotates to the 'closing' or 'opening' position, the travel switch 40 triggers the corresponding position signals, so that an operator can more directly and truly know the working state of the operating mechanism from the signals, and the control of the GIS by one key is facilitated.

6) The operating mechanism of the utility model can be adapted to the existing modular design without special space requirements, so that the double confirmation of the working position of the high-voltage switch can be simply realized.

While the foregoing has described the technical content and features of the present utility model, it will be appreciated that those skilled in the art, upon attaining the teachings of the present utility model, may make variations and improvements to the concepts disclosed herein, which fall within the scope of the present utility model.

The above description of embodiments is illustrative and not restrictive, and the scope of the utility model is defined by the claims.

Claims

1. A high voltage switch operating mechanism, comprising:

a driving module;

the output shaft (10) is driven by the driving module to rotate so as to drive the switch body to realize opening and closing operation, and the output shaft (10) is provided with a first tooth (11);

-a cam (20), said cam (20) being provided with second teeth (21) meshing with said first teeth (11) so that said cam (20) moves with the rotation of said output shaft (10);

-a plurality of transmission arms (30), each of the plurality of transmission arms (30) being configured to be able to contact an outer contour surface (22) of the cam (20), wherein each of the plurality of transmission arms (30) is rotatable about a fixed rotation axis (50) with a movement of the outer contour surface (22) upon movement of the cam (20); and

a plurality of signal triggering components, each of the plurality of signal triggering components configured to trigger a signal representing a switch opening and closing position when the corresponding actuator arm (30) rotates to a predetermined position.

2. The high voltage switch operating mechanism of claim 1, wherein each of the plurality of actuator arms (30) includes a first contact surface (31) for contacting an outer contoured surface (22) of the cam (20), the first contact surface (31) being an arcuate surface.

3. The high voltage switch operating mechanism of claim 1, wherein each of the plurality of signal triggering members is a mechanically depressed travel switch (40).

4. A high voltage switch operating mechanism according to claim 3, characterized in that each of the plurality of transmission arms (30) comprises a second contact surface (32) pressing the corresponding travel switch (40), the second contact surface (32) being a flat surface.

5. The high-voltage switch operating mechanism according to any one of claims 1 to 4, characterized in that the first tooth (11) is configured as an external gear and the second tooth (21) is configured as an internal gear, so that the cam (20) rotates with rotation of the output shaft (10).

6. The high-voltage switch operating mechanism according to any one of claims 1 to 4, characterized in that the first tooth (11) is configured as an external gear and the second tooth (21) is configured as a rack such that the cam (20) translates with rotation of the output shaft (10).

7. A high-voltage switch comprising a switch body and the high-voltage switch operating mechanism according to any one of claims 1 to 6 for driving the switch body to perform an opening/closing operation.

8. The high voltage switch of claim 7, wherein the high voltage switch is any one of a disconnector, a grounding switch, a disconnector grounding switch, and a quick grounding switch.

9. The high voltage switch of claim 8, wherein the high voltage switch is an isolated ground switch, and the high voltage switch operating mechanism comprises four drive arms (30) and four signal triggering members configured to trigger signals indicative of an isolated switch-on position, an isolated switch-off position, a ground switch-on position, and a ground switch-off position, respectively, when the corresponding drive arm (30) is rotated to a predetermined position.