Control device of vacuum circuit breaker

Abstract

The utility model relates to the technical field of vacuum circuit breakers, in particular to a control device of a vacuum circuit breaker, which comprises a control base, a control cavity arranged on the control base, an opening and closing handle rotatably arranged on the surface of the control base, and a control cavity arranged on the control base, one end of the control base is located in the control cavity, the other end of the rotary shaft is located in the control cavity, the linkage plate is arranged at the other end of the rotary shaft, the detection switch is arranged on the control base and located in the control cavity, the contact plate is arranged on the linkage plate, and the driving mechanism is arranged between the control base and the linkage plate and located in the control cavity. Compared with a traditional mode that the device is exposed in the outside air, normal operation and detection precision are not prone to being affected by rainwater erosion, dust accumulation and external force collision in the external environment, the service life of the whole control device can be prolonged, and maintenance cost and fault occurrence risks are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker technology, and specifically to a control device for a vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers are named for their high-vacuum arc-extinguishing medium and the high-vacuum insulation medium in the contact gap after arc extinguishing. They are characterized by their small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing, making them widely used in power distribution networks. Vacuum circuit breakers are outdoor power distribution devices in 35kV and below, 50Hz three-phase AC systems. They are used for the protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. Outdoor vacuum circuit breakers are exposed to the natural environment and are key control and protection equipment in power lines, especially in rural power grids, suburban power grids, and railway traction power supply systems.

[0003] The control device of the vacuum circuit breaker can perform opening and closing operations locally, or remote operation via a communication interface. For example, it can be equipped with a dedicated wireless remote control for remote control operation, connected to a control box for local operation, or remotely controlled via a communication network. Power can be cut off and restored without being mounted on a pole, realizing protection, communication, and automatic monitoring functions, and meeting the requirements of power system informatization.

[0004] Current control devices, such as the linkage control device disclosed in Chinese Patent No. CN201520233338.1, include a pole-mounted control base, a remote controller, and a monitoring center. The pole-mounted control base has a manual opening / closing handle, and directly below the handle is a rotating mechanism. This rotating mechanism includes a rotating shaft and a turntable at the end of the shaft. The two ends of the manual opening / closing handle are symmetrically connected to the turntable via tension springs. The rotating mechanism also includes a detection controller interlocked with the closing coil of the pole-mounted vacuum circuit breaker and the remote controller, located beside the rotating shaft. This linkage control device, when performing a manual opening operation outdoors, can automatically disconnect the closing coil of the pole-mounted vacuum circuit breaker and the remote controller, effectively preventing accidental closing of the pole-mounted vacuum circuit breaker and ensuring the personal safety of outdoor personnel. When performing a manual closing operation outdoors, it can automatically connect the closing coil of the pole-mounted vacuum circuit breaker and the remote controller, ensuring normal remote control.

[0005] Although the control device in the aforementioned patent can detect the rotation state of the shaft through a detection switch, the rotating mechanism and tension spring of this structure are exposed on the outer surface of the circuit breaker body. During long-term use, they are susceptible to external environmental factors such as rainwater erosion, dust accumulation, and external impacts. These factors may not only cause rust and wear on the rotating mechanism and tension spring, affecting their normal operation and detection accuracy, but may also shorten the service life of the entire control device, increasing maintenance costs and the risk of malfunctions. Utility Model Content

[0006] The purpose of this invention is to provide a control device for a vacuum circuit breaker, addressing the shortcomings and deficiencies of existing technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a control device for a vacuum circuit breaker, comprising a control base, a control cavity formed on the control base, a handle rotatably disposed on the surface of the control base, a rotating shaft with one end fixed to the handle and the other end located in the control cavity, a linkage plate disposed at the other end of the rotating shaft for rotating with the handle, a detection switch disposed on the control base and located in the control cavity, a contact plate disposed on the linkage plate for contacting or disengaging from the detection switch after the linkage plate rotates with the handle, and a drive mechanism disposed between the control base and the linkage plate and located in the control cavity for driving the linkage plate to maintain a specific position after the linkage plate rotates, so as to keep the contact plate in contact or disengagement from the detection switch.

[0008] A further improvement is that the drive mechanism includes a main linkage column fixedly mounted on the control base and located within the control cavity, a secondary linkage column vertically fixed on the linkage plate, a main drive column rotatably mounted on the main linkage column at one end, a secondary drive column rotatably mounted on the secondary linkage column at one end, and a drive spring disposed between the other end of the main drive column and the other end of the secondary drive column for compressing and generating elastic potential energy when the linkage plate rotates, and releasing the elastic potential energy after the linkage plate rotates.

[0009] Further effects: During the rotation of the linkage plate, when the main drive column and the auxiliary drive column approach each other, the drive spring is compressed by the approach of the main drive column and the auxiliary drive column, generating elastic potential energy. When the linkage plate rotates to a specific angle (when the contact plate and the detection switch are in contact or disengagement), the drive spring releases the elastic potential energy to push the linkage plate to maintain a specific angle. At this time, if the opening and closing handle is controlled in the opposite direction to drive the linkage plate to rotate, it will be subject to the resistance of the drive spring. Thus, when the opening and closing handle is not controlled, it can prevent the opening and closing handle from rotating due to external factors such as gravity or wind, which can play a protective role in the opening and closing state.

[0010] A further improvement is that the control base is provided with a contact limiting post located in the control cavity to restrict the linkage plate from continuing to rotate in the same direction when the drive spring releases its elastic potential energy and pushes the linkage plate to rotate so that the contact plate contacts the detection switch.

[0011] Further benefits: By setting the contact limit post, the rotation direction of the linkage plate can be restricted, preventing the excessive force of the spring released by the drive spring from pushing the linkage plate to rotate, which would cause the contact plate to be pressed against the detection switch under high pressure for a long time, thus affecting the service life of the detection switch.

[0012] A further improvement is that a guide hole is provided at the other end of the main drive column, and a guide rod is provided at the other end of the auxiliary drive column to cooperate with the guide hole with a clearance, so as to prevent the drive spring from bending and deforming when the linkage plate rotates, thus affecting the driving effect on the linkage plate.

[0013] Further benefits: When the linkage plate rotates, causing the main drive column and the auxiliary drive column to move closer or further apart, the guide opening and guide rod limit the bending deformation of the drive spring, further preventing errors in the control process.

[0014] A further improvement is made as follows: a secondary shaft is provided on the control base within the control cavity, and a mating plate is provided on the linkage plate. One end of the mating plate is rotatable on the linkage plate, and the other end of the mating plate has a moving waist hole that is clearance-fitted with the secondary shaft to allow the mating plate to move around the outer periphery of the secondary shaft when the linkage plate rotates, and to guide the moving direction of the mating plate. A secondary connecting plate is provided on the secondary shaft, and a locking opening is provided on the other end of the linkage plate. A locking rod is provided on the secondary connecting plate, with one end of the locking rod fixedly mounted on the secondary connecting plate and the other end located within the locking opening.

[0015] Further effect: During the rotation of the linkage plate, the mating plate moves through the moving waist hole to the outside of the sub-shaft. When the linkage plate rotates to the point where the contact plate is disengaged from the detection switch, the locking rod is located on the right side of the locking opening, further restricting the linkage plate from continuing to rotate in that direction. This can serve as a limit switch and prevent misoperation.

[0016] A further improvement is that the secondary shaft is rotatably mounted on the control base, and the control base is provided with a control handle for driving the secondary shaft to rotate. The secondary connecting plate is fixedly mounted on the secondary shaft and is used to make the secondary connecting plate rotate with the secondary shaft when the secondary shaft is driven to rotate, so that the locking rod enters or leaves the locking opening.

[0017] A further improvement is that the control base is fixedly provided with two side limiting posts located in the control cavity, which abut against the side of the sub-connecting plate to play a limiting role when the locking rod enters or leaves the locking opening.

[0018] Further benefits: The rotation range of the auxiliary plate can be limited by the setting of two side limit posts, so that the operator can determine whether the locking rod has entered the locking opening when operating the control handle.

[0019] A further improvement is that a connecting column is fixedly installed on the control base, a fixing column is fixedly installed on the sub-connecting plate, and a tension spring is provided between the connecting column and the fixing column to tighten the side of the sub-connecting plate against the side limiting column.

[0020] Further benefits: By pulling the sub-plate against the side limit post with a tension spring, the sub-plate or control handle can be prevented from rotating due to slight external touches or wind. The tension spring also increases the control force of the control handle to prevent misoperation and keeps the sub-plate in a certain position.

[0021] After adopting the above technical solution, the beneficial effects of this utility model are as follows: When manual opening and closing operations are required, the opening and closing handle is held by hand or hooked on the side of the handle by an insulating rod. The handle is rotated and tilted on the surface of the control base. When the handle rotates, the linkage plate is driven to rotate together through the rotating shaft, so that the contact plate contacts or disengages from the detection switch. After the linkage plate rotates, the drive mechanism drives the linkage plate to maintain a specific position to keep the contact plate in contact or disengagement from the detection switch. The linkage plate, detection switch, contact plate, and drive mechanism are set in the control cavity. Compared with the traditional exposed installation in the outside air, it is not easily affected by rainwater erosion, dust accumulation, and external impact, which can affect the normal operation and detection accuracy. This can increase the service life of the entire control device and reduce maintenance costs and the risk of failure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0025] Figure 3 This is an isometric view of the opening and closing handle, linkage plate, and auxiliary connecting plate in this utility model.

[0026] Figure 4 This is a top isometric view of the opening and closing handle, the linkage plate, and the auxiliary connecting plate in this utility model;

[0027] Figure 5 This is a front view of the split handle, linkage plate, and auxiliary connecting plate in this utility model;

[0028] Figure 6 This is a diagram showing the upward swing of the control handle in this utility model;

[0029] Figure 7 This is a bottom view of the split handle, linkage plate, and auxiliary connecting plate in this utility model;

[0030] Figure 8 This is a cross-sectional view of the main drive column, auxiliary drive column, drive spring, guide opening, and guide rod in this utility model;

[0031] Figure 9 This is a front view of the linkage plate and the mating plate in this utility model;

[0032] Figure 10 This is a schematic diagram of the sub-connecting plate and the locking rod in this utility model;

[0033] Figure 11 This is a diagram showing the downward swing of the control handle in this utility model.

[0034] Explanation of reference numerals in the attached drawings: 1. Control base; 2. Control cavity; 3. Opening / closing handle; 4. Rotating shaft; 5. Linkage plate; 6. Detection switch; 7. Contact plate; 8. Main linkage column; 9. Secondary linkage column; 10. Main drive column; 11. Secondary drive column; 12. Drive spring; 13. Contact limit column; 14. Guide opening; 15. Guide rod; 16. Secondary shaft; 17. Mating plate; 18. Moving waist hole; 19. Secondary connecting plate; 20. Locking opening; 21. Locking rod; 22. Control handle; 23. Side limit column; 24. Connecting column; 25. Fixing column; 26. Tension spring; 27. Mounting bracket. Detailed Implementation

[0035] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0036] See Figures 1 to 11 As shown, the technical solution adopted in this specific embodiment is: a control device for a vacuum circuit breaker, including a control base 1, a control cavity 2 opened on the control base 1, a handle 3 rotatably disposed on the surface of the control base 1, a rotating shaft 4 with one end fixed on the handle 3 and the other end located in the control cavity 2, a linkage plate 5 disposed at the other end of the rotating shaft 4 for rotating with the handle 3, a detection switch 6 disposed on the control base 1 and located in the control cavity 2, a contact plate 7 disposed on the linkage plate 5 for contacting or disengaging from the detection switch 6 after the linkage plate 5 rotates with the handle 3, and a drive mechanism disposed between the control base 1 and the linkage plate 5 and located in the control cavity 2 for driving the linkage plate 5 to maintain a specific position after the linkage plate 5 rotates, so as to keep the contact plate 7 in contact or disengagement with the detection switch 6.

[0037] like Figure 2 , Figure 3 As shown, a mounting bracket 27 for mounting a detection switch 6 is provided inside the control cavity 2 of the vacuum circuit breaker. This mounting bracket 27 is located on one side of the rotating shaft 4, and the detection switch 6 is mounted on the mounting bracket 27 by bolts. A rotating sleeve is fixedly installed on the outer surface of the vacuum circuit breaker. One end of the opening / closing handle 3 is rotatable on the rotating sleeve. The rotating shaft 4 passes through the rotating sleeve and is fixedly connected to the other end of the opening / closing handle 3. The other end of the rotating shaft 4 is welded to the linkage plate 5 or engaged with the rotating shaft 4 through an opening in the linkage plate 5. The detection switch 6 is a contact-type switching element; the circuit is connected when subjected to external force or contact, and the circuit is disconnected when the contact is released. The contact plate 7 is welded and fixed to the linkage plate 5, or integrally formed with the linkage plate 5. Figure 4 As shown, the contact plate 7 is perpendicular to the surface of the linkage plate 5 so that it can contact the detection switch 6 after the linkage plate 5 rotates. The pole in the control base 1 is set as shown in the figure. Figure 1 The upper end face shown in the figure forms a complete vacuum circuit breaker.

[0038] The drive mechanism includes a main linkage column 8 fixedly mounted on the control base 1 within the control cavity 2, a secondary linkage column 9 vertically fixed on the linkage plate 5, a main drive column 10 rotatably mounted on the main linkage column 8 at one end, a secondary drive column 11 rotatably mounted on the secondary linkage column 9 at one end, and a drive spring 12 located between the other ends of the main drive column 10 and the secondary drive column 11, used to compress and generate elastic potential energy when the linkage plate 5 rotates, and to release the elastic potential energy after the linkage plate 5 rotates. The main linkage column 8 is fixed to the control base 1 by welding. The secondary linkage column 9 is fixed to the linkage plate 5 by welding. Figures 3 to 6 As shown, the auxiliary linkage column 9 is positioned near the main linkage column 8 on the linkage plate 5. One end of the main drive column 10 and one end of the auxiliary drive column 11 are respectively fitted with openings to the main linkage column 8 and the auxiliary linkage column 9, allowing rotation of the main drive column 10 and the auxiliary drive column 11. This rotational fit allows the main drive column 10 and the auxiliary drive column 11 to follow the rotation of the linkage plate 5, maintaining their parallel position and reducing the bending deformation of the drive spring 12. The two ends of the compression spring are fixed between the main drive column 10 and the auxiliary drive column 11.

[0039] A contact limiting post 13 is installed on the control base 1 within the control cavity 2. This post restricts the rotation of the linkage plate 5 in the same direction when the drive spring 12 releases its elastic potential energy, causing the contact plate 7 to contact the detection switch 6. Without the contact limiting post 13, the same limiting effect can be achieved through the compression between the contact plate 7 and the detection switch 6 when they are in contact. However, after prolonged use, the detection switch 6 is susceptible to pressure damage, affecting its lifespan. The contact limiting post 13 is positioned as follows: Figure 6 As shown.

[0040] The other end of the main drive column 10 is provided with a guide hole 14, and the other end of the auxiliary drive column 11 is provided with a guide rod 15 for clearance fitting with the guide hole 14, so as to prevent the drive spring 12 from bending and deforming when the linkage plate 5 rotates, thus affecting the driving effect on the linkage plate 5. The guide rod 15 is fixedly mounted on the other end of the auxiliary drive column 11.

[0041] A secondary shaft 16 is provided on the control base 1 inside the control cavity 2. A mating plate 17 is provided on the linkage plate 5. One end of the mating plate 17 is rotatable on the linkage plate 5. The other end of the mating plate 17 has a moving waist hole 18 that is clearance-fitted with the secondary shaft 16 to allow the mating plate 17 to move around the outer periphery of the secondary shaft 16 when the linkage plate 5 rotates, and to guide the moving direction of the mating plate 17. A secondary connecting plate 19 is provided on the secondary shaft 16. A locking opening 20 is provided on the other end of the linkage plate 5. A locking rod 21 is provided on the secondary connecting plate 19. One end of the locking rod 21 is fixedly set on the secondary connecting plate 19, and the other end is located in the locking opening 20.

[0042] The position and shape of the locking opening 20 and the locking rod 21 are as follows: Figure 9 Figure 10 As shown.

[0043] The secondary shaft 16 is rotatably mounted on the control base 1. The control base 1 is provided with a control handle 22 for driving the secondary shaft 16 to rotate. The secondary connecting plate 19 is fixedly mounted on the secondary shaft 16 and is used to make the secondary connecting plate 19 rotate with the secondary shaft 16 when the secondary shaft 16 is driven to rotate, so that the locking rod 21 enters or leaves the locking opening 20.

[0044] Alternatively, the secondary shaft 16 can be left in a fixed position instead of rotating, allowing both the secondary shaft 16 and the secondary connecting plate 19 to remain stationary within the locking opening 20. The secondary connecting plate 19 rotating with the secondary shaft 16 facilitates equipment maintenance and testing.

[0045] The control base 1 is provided with two side limit posts 23, which are fixedly installed in the control cavity 2 to abut against the side of the sub-connecting plate 19 to limit the movement when the locking rod 21 enters or leaves the locking opening 20.

[0046] A connecting post 24 is fixedly installed on the control base 1, and a fixing post 25 is fixedly installed on the sub-connecting plate 19. A tension spring 26 is provided between the connecting post 24 and the fixing post 25 to tighten the side of the sub-connecting plate 19 against the side limiting post 23. The two ends of the tension spring 26 are hooked onto the connecting post 24 and the fixing post 25 respectively.

[0047] The working principle of this utility model is as follows: When manual opening and closing operation is required, the opening and closing handle 3 is held by hand or hooked on the side of the opening and closing handle 3 by using an insulating rod. The opening and closing handle 3 is rotated and tilted on the surface of the control base 1. When the opening and closing handle 3 rotates, the rotating shaft 4 drives the linkage plate 5 to rotate together, so that the contact plate 7 contacts or disengages from the detection switch 6. After the linkage plate 5 rotates, the drive spring 12 releases the elastic potential energy to push the linkage plate 5 to maintain a specific angle, so as to keep the contact plate 7 in contact or disengagement from the detection switch 6. The linkage plate 5, detection switch 6, contact plate 7 and drive mechanism are set in the control cavity 2. Compared with the traditional exposed installation in the outside air, it is not easily affected by rainwater erosion, dust accumulation and external force collision, which can increase the service life of the entire control device and reduce maintenance costs and the risk of failure.

[0048] By setting the contact limit post 13, the rotation direction of the linkage plate 5 can be restricted, preventing the spring force released by the drive spring 12 from excessively pushing the linkage plate 5 to rotate, which would cause the contact plate 7 to be pressed against the detection switch 6 under high pressure for a long time, affecting the service life of the detection switch 6.

[0049] When the linkage plate 5 rotates, causing the main drive column 10 and the auxiliary drive column 11 to move closer or further apart, the drive spring 12 is restricted from bending and deforming by the guide opening 14 and the guide rod 15, further preventing errors in the control process.

[0050] During the rotation of the linkage plate 5, the mating plate 17 is driven to move outside the secondary shaft 16 through the moving waist hole 18. When the linkage plate 5 rotates to the point where the contact plate 7 is disengaged from the detection switch 6, the locking rod 21 is located on the right side of the locking opening 20, which further restricts the linkage plate 5 from continuing to rotate in that direction, thus playing a limiting role and preventing misoperation.

[0051] The tension spring 26 pulls the sub-plate 19 to keep it abutting against the side limit post 23, which can prevent the sub-plate 19 or the control handle 22 from rotating due to slight external touch or wind. The tension spring 26 is set to increase the control force of the control handle 22 to prevent misoperation and to keep the sub-plate 19 in a certain position.

[0052] This utility model aims to protect the structure of the product. The model numbers of the components are not the subject of this utility model's protection and are already known technology. Any component on the market that can achieve the functions described above can be used as a control device for a vacuum circuit breaker. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A control device for a vacuum circuit breaker, comprising a control base, a control cavity formed on the control base, and an opening / closing handle rotatably disposed on the surface of the control base, characterized in that: It also includes a rotating shaft with one end fixed to the opening / closing handle and the other end located in the control cavity; a linkage plate located at the other end of the rotating shaft for rotating with the opening / closing handle; a detection switch located on the control base and in the control cavity; a contact plate located on the linkage plate for contacting or disengaging from the detection switch after the linkage plate rotates with the opening / closing handle; and a drive mechanism located between the control base and the linkage plate and in the control cavity for driving the linkage plate to maintain its rotational position after the linkage plate rotates, so as to keep the contact plate in contact or disengagement with the detection switch.

2. The control device for a vacuum circuit breaker according to claim 1, characterized in that: The drive mechanism includes a main linkage column fixedly mounted on the control base and located within the control cavity, a secondary linkage column vertically fixed on the linkage plate, a main drive column rotatably mounted on the main linkage column at one end, a secondary drive column rotatably mounted on the secondary linkage column at one end, and a drive spring disposed between the other end of the main drive column and the other end of the secondary drive column for compressing and generating elastic potential energy when the linkage plate rotates, and releasing the elastic potential energy after the linkage plate rotates.

3. The control device for a vacuum circuit breaker according to claim 2, characterized in that: The control base is equipped with a contact limit post located in the control cavity, which is used to limit the linkage plate from continuing to rotate in the same direction when the drive spring releases its elastic potential energy and pushes the linkage plate to rotate so that the contact plate contacts the detection switch.

4. The control device for a vacuum circuit breaker according to claim 2, characterized in that: The other end of the main drive column is provided with a guide hole, and the other end of the auxiliary drive column is provided with a guide rod for clearance fit with the guide hole, so as to prevent the drive spring from bending and deforming when the linkage plate rotates, thus affecting the driving effect on the linkage plate.

5. The control device for a vacuum circuit breaker according to claim 1, characterized in that: The vacuum circuit breaker body has a secondary shaft located within the control cavity. The linkage plate has a mating plate, one end of which is rotatable on the linkage plate. The other end of the mating plate has a moving slot that is clearance-fitted with the secondary shaft and allows the mating plate to move around the outer periphery of the secondary shaft when the linkage plate rotates, and guides the moving direction of the mating plate. The secondary shaft has a secondary connecting plate, and the other end of the linkage plate has a locking opening. The secondary connecting plate has a locking rod, one end of which is fixedly mounted on the secondary connecting plate, and the other end is located within the locking opening.

6. The control device for a vacuum circuit breaker according to claim 5, characterized in that: The secondary shaft is rotatably mounted on the control base, which is equipped with a control handle for driving the secondary shaft to rotate. The secondary connecting plate is fixedly mounted on the secondary shaft and is used to make the secondary connecting plate rotate with the secondary shaft when the secondary shaft is driven to rotate, so that the locking rod enters or leaves the locking opening.

7. The control device for a vacuum circuit breaker according to claim 6, characterized in that: The control base has two side limiting posts fixedly installed in the control cavity, which abut against the side of the auxiliary plate to limit the movement when the locking rod enters or leaves the locking opening.

8. The control device for a vacuum circuit breaker according to claim 7, characterized in that: A connecting column is fixedly installed on the control base, and a fixing column is fixedly installed on the sub-connecting plate. A tension spring is provided between the connecting column and the fixing column to tighten the side of the sub-connecting plate against the side limiting column.

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