A switching device opening and closing auxiliary device and circuit breaker

Abstract

The utility model discloses a kind of switching device's auxiliary device of opening and closing and circuit breaker, comprising: support component;Sliding component, it is slidably arranged in support component along preset direction, and with the movement component of switching device for performing opening and closing linkage arrangement, to be driven sliding by movement component;Elastic member, the elastic member is arranged between the first limiting portion of sliding component and support component setting, and can be compressed by the sliding component along the preset direction;The closing process of switching device includes first closing stage and second closing stage in turn, in first closing stage, sliding component is not compressed or not further compressed elastic member, in second closing stage, sliding component slides and compresses elastic member, so that elastic member energy storage;When switching device opens, elastic member releases energy storage.The utility model significantly improves the opening speed of switching device, and the utility model only plays a role at closing end period, and the influence to closing speed is small.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, and in particular to an auxiliary device for opening and closing switchgear and a circuit breaker. Background Technology

[0002] Existing switching devices, such as circuit breakers, are devices capable of closing, carrying, and interrupting current under normal circuit conditions. In particular, circuit breakers can carry and interrupt current under abnormal circuit conditions (including short-circuit conditions) within a specified time to prevent faults such as overload, short circuit, and undervoltage.

[0003] As electricity demand continues to increase, the current that switching equipment (such as circuit breakers) needs to carry and the short-circuit current that it needs to interrupt are also constantly increasing, and the quality requirements for switching equipment are becoming increasingly stringent. For example, there is a need to improve the opening speed to enhance performance.

[0004] For circuit breakers, increasing the opening speed can be achieved by increasing the energy of the moving contact. However, if the closing overshoot of the mechanism is large, the vacuum interrupter (bubble) will bear greater force during the closing process, thereby increasing the static pressure during the closing holding phase, which may cause the bubble to be crushed and fail. In addition, developing high-strength bubbles will increase costs.

[0005] Increasing the tripping energy to improve the tripping speed will lead to a decrease in the closing speed, requiring further increases in the closing energy. This will increase the strength requirements of the operating mechanism and transmission system, increasing design and manufacturing costs. Furthermore, the increased tripping energy will render the existing oil buffer insufficient for the tripping buffer requirements, necessitating a re-matching of the appropriate oil buffer.

[0006] If significant modifications to the opening and closing energy are required, the existing circuit breaker space may be insufficient, necessitating a redesign of the entire circuit breaker's operating mechanism and drive system, which will result in higher design and verification costs.

[0007] In order to avoid large-scale modifications to existing mature mechanisms and reduce the testing costs required for re-verification, there is an urgent need for an auxiliary device that can be applied to existing switchgear to adjust the load torque and opening / closing speed of the entire system to meet the performance requirements of existing switchgear. Utility Model Content

[0008] This utility model addresses the technical problems existing in the prior art by providing an auxiliary device for opening and closing switching equipment and a circuit breaker. This device can be directly applied to existing mature switching equipment, significantly improving the opening speed while avoiding adverse effects on the closing speed.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a switching equipment opening and closing auxiliary device, comprising:

[0010] Support components;

[0011] A sliding component is slidably disposed on a support component in a preset direction and is linked with a moving component of a switching device for performing opening and closing operations, so as to be driven to slide by the moving component;

[0012] An elastic element is disposed between the sliding component and the first limiting portion provided on the supporting component, and can be compressed by the sliding component along the preset direction;

[0013] The closing process of the switchgear includes a first closing stage and a second closing stage. In the first closing stage, the sliding component does not compress or further compress the elastic element. In the second closing stage, the sliding component slides and compresses the elastic element, causing the elastic element to store energy. When the switchgear is opened, the elastic element releases the stored energy.

[0014] In a preferred embodiment, the first closing stage is the process of the moving contact of the switchgear moving from the starting position to contact the stationary contact of the switchgear, and the second closing stage corresponds to the overtravel stage of the moving contact; the opening process of the switchgear sequentially includes a first opening stage and a second opening stage, the elastic element completes the energy storage release in the first opening stage; the elastic element is in a pre-compression state in the first closing stage.

[0015] In a preferred embodiment, the sliding component and the moving component are rotatably connected by a shaft-hole fit.

[0016] In a preferred embodiment, the sliding component includes a first slider and a second slider that are sequentially distributed along the direction of compressing the elastic element. The first slider is connected to the moving component, and the elastic element is disposed between the second slider and the first limiting portion. During the first closing phase, only the first slider slides in the direction of compressing the elastic element. During the second closing phase, the first slider pushes the second slider to slide and compresses the elastic element.

[0017] In a preferred embodiment, when the switching device is in the open state, there is a preset distance between the first slider and the second slider; the support member is provided with a second limiting part, which is located between the first slider and the second slider and limits the sliding stroke of the second slider along the direction of releasing the elastic member.

[0018] In a preferred embodiment, the second slider has a hollow structure with one end open and the other end narrowed, and the second limiting part is located inside the second slider.

[0019] In a preferred embodiment, the first limiting portion is adjustable to adjust the preload of the elastic element; the supporting component includes a screw and a first guide sleeve and a second guide sleeve sequentially threaded to the screw along the direction of compressing the elastic element; the first slider is slidably sleeved outside the first guide sleeve, and the second slider is slidably sleeved outside the second guide sleeve; the first limiting portion is disposed on the second guide sleeve, and the first guide sleeve is provided with a second limiting portion to limit the sliding stroke of the second slider along the direction of releasing the elastic element; the elastic element is sleeved outside the second guide sleeve, and the elastic element is a compression spring.

[0020] In a preferred embodiment, the screw is threaded with at least one anti-loosening nut on the side of the first limiting portion opposite to the elastic element or at the end of the second guide sleeve away from the first guide sleeve; the first limiting portion is a ring of boss structure protruding on the outer wall surface of the second guide sleeve, and the second limiting portion is a ring of boss structure protruding on the outer wall surface of the first guide sleeve.

[0021] In a preferred embodiment, the support component is connected to the fixed part of the switchgear using a mounting component; the mounting component includes a mounting block fixedly connected to the support component and a mounting frame mounted on the fixed part, wherein the mounting block is fixedly connected to the mounting frame, or the mounting block is rotatably connected to the mounting frame, and the rotation axis of the mounting block is perpendicular to the sliding direction of the sliding component.

[0022] In a preferred embodiment, the supporting component, sliding component, and elastic element cooperate to form a set of auxiliary units, and the auxiliary units are provided in multiples, with the multiple auxiliary units arranged in parallel.

[0023] This utility model also provides a circuit breaker, including the opening and closing auxiliary device of the switching equipment as described above, wherein the circuit breaker constitutes the switching equipment.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention comprises a supporting component, a sliding component, and an elastic element. By controlling the operational phase of the elastic element, it effectively solves the cost increase problem caused by the increased strength requirements of the tripping buffer and overall structure due to the increased energy of the tripping spring in existing technologies. Through this design, this invention significantly improves the tripping speed, eliminating the need for additional energy in the contact spring used to maintain contact pressure, thereby reducing the strength requirements of the contact spring and significantly saving R&D costs. Furthermore, this invention only operates at the end of the closing phase of the switchgear, having minimal impact on the closing speed. It achieves the desired effect without major modifications to the moving parts of the switchgear, and can be directly applied to existing mature switchgear, further reducing R&D costs.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the opening and closing auxiliary device and circuit breaker of the present invention are not limited to the embodiments. Attached Figure Description

[0027] Figure 1 This is an exploded view of the opening and closing auxiliary device of this utility model, as described in Embodiment 1.

[0028] Figure 2 This is a structural schematic diagram (including mounting block) of the support component of a utility model according to an embodiment.

[0029] Figure 3 This is a three-dimensional structural schematic diagram of the opening and closing auxiliary device of this utility model, as shown in the embodiment.

[0030] Figure 4 This is a front view of the opening and closing auxiliary device of this utility model according to embodiment;

[0031] Figure 5 This is a front view of the opening and closing auxiliary device of this utility model in the first closing stage, according to an embodiment.

[0032] Figure 6 This is a top view (perspective) of the opening and closing auxiliary device of this utility model in the first closing stage.

[0033] Figure 7 This is a front view of the opening and closing auxiliary device of this utility model in the second closing stage, according to an embodiment.

[0034] Figure 8 This is a top view (perspective) of the opening and closing auxiliary device of this utility model in the second closing stage;

[0035] Figure 9 This is a three-dimensional structural schematic diagram of the opening and closing auxiliary device of this utility model in Embodiment 2;

[0036] Figure 10 This is a front view of the opening and closing auxiliary device of this utility model in Embodiment 2;

[0037] In the figure, 1 is the first slider; 11 is the pin; 2 is the second slider; 3 is the compression spring; 4 is the screw; 5 is the first guide sleeve; 51 is the second limiting part; 6 is the second guide sleeve; 61 is the first limiting part; 7 is the anti-loosening nut; 8 is the mounting block; 81 is the convex shaft; 9 is the mounting bracket; 91 is the mounting base; 911 is the mounting groove; 912 is the notch; and 92 is the cover plate. Detailed Implementation

[0038] In this invention, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] Example 1

[0040] Please see Figures 1-8 As shown, this utility model discloses an auxiliary device for opening and closing a switchgear, comprising a support component, a sliding component, and an elastic element. The support component is connected to a fixed part of the switchgear. The sliding component is slidably disposed on the support component along a preset direction and is linked with a moving component of the switchgear used to perform opening and closing, so that it is driven to slide by the moving component. The elastic element is disposed between the sliding component and a first limiting part 61 disposed on the support component, and can be compressed by the sliding component along the preset direction. The closing process of the switchgear sequentially includes a first closing stage and a second closing stage. In the first closing stage, the sliding component does not compress or further compresses the elastic element. In the second closing stage, the sliding component slides and compresses the elastic element, allowing the elastic element to store energy for opening. When the switchgear opens, the elastic element releases the stored energy, providing opening energy for the moving contact of the switchgear to move in the opening direction, thereby increasing the opening speed. Specifically, the opening process of the switchgear also includes a first opening stage and a second opening stage. In the first opening stage, the elastic element releases its stored energy to provide opening energy for the moving contact and its connected transmission mechanism. In the second opening stage, the elastic element no longer provides energy for opening. After the second opening stage ends, the entire opening and closing auxiliary device returns to its initial state. In this embodiment, the aforementioned preset direction is the opening and closing direction of the switchgear.

[0041] In a preferred embodiment, the first closing stage is the process of the moving contact of the switchgear moving from its initial position to contacting the stationary contact of the switchgear, and the second closing stage corresponds to the overtravel stage of the moving contact. This design ensures that the elastic element does not affect the closing speed of the moving contact during the first closing stage, thereby guaranteeing the performance of the switchgear. In other embodiments, the first closing stage refers to the process of the moving contact moving from its initial position to contacting the stationary contact of the switchgear. This design ensures that the elastic element does not affect the initial closing speed of the moving contact, thereby ensuring smoother and more reliable operation of the switchgear, reducing mechanical shock, improving overall operating efficiency, and extending the service life of the equipment.

[0042] In a preferred embodiment, the elastic element is in a pre-compressed state during the first closing stage, i.e., the elastic element adopts a pre-compressed design. This design not only reduces the axial space occupied by the elastic element, but more importantly, it allows the energy of the elastic element to be released during the critical rigid opening stage, thereby significantly improving the rigid opening speed. This improvement solves the problem of needing to strengthen the strength of the opening buffer and the overall mechanism due to the increased energy of the opening spring in the original solution, thus reducing costs; on the other hand, it eliminates the need to increase the energy of the contact spring (i.e., the moving contact) used to maintain the contact clamping force, thereby avoiding the need to increase the strength requirements of the bulb and significantly saving R&D costs. Furthermore, the elastic element is preferably a compression spring 3; however, this invention is not limited to this. In other embodiments, disc springs, gas springs, rubber elastomers, or wave springs with equivalent reset functions can also be used to adapt to different operating conditions.

[0043] The sliding component and the moving component of the switching device are rotatably connected by a shaft-hole fit. In this embodiment, the moving component of the switching device is provided with a shaft hole, which is inserted into the pin 11 provided on the sliding component, thereby allowing relative rotation between the moving component and the sliding component.

[0044] like Figure 1 As shown, the sliding component includes a first slider 1 and a second slider 2 sequentially distributed along the direction of the compression elastic element (i.e., the compression spring 3, but not limited to this). The first slider 1 is connected to the moving part of the switching device. Therefore, a pin 11 is provided on each of the opposite sides of the first slider 1. The two pins 11 are coaxial and integrally formed or fixedly connected to the first slider 1. The two pins 11 are matched with two corresponding shaft holes on the moving part. The compression spring 3 is disposed between the second slider 2 and the first limiting part 61. Therefore, the second slider 2 can pre-compress the compression spring 3, so that the compression spring 3 remains in a pre-compressed state during the first closing stage. During the first closing stage, only the first slider 1 slides in the direction of compressing the compression spring 3; during the second closing stage, the first slider 1 pushes the second slider 2 to slide and compresses the elastic element. Specifically, when the switching device is in the open state, there is a preset distance between the first slider 1 and the second slider 2. This is the sliding stroke of the first slider 1 during the first closing stage. When the first closing stage ends, the first slider 1 has just completed the preset stroke and contacts the second slider 2. In other embodiments, the sliding component is a single piece or an integrated component, and there is a free travel between it and the moving component of the switching device, so that the sliding component does not slide during the first closing stage, thereby avoiding compression or further compression of the elastic component; in this embodiment, the free travel can be achieved simply by setting the hole on the sliding component as an elongated hole, or an elongated hole can also be set on the moving component to achieve the free travel.

[0045] Furthermore, the support component is provided with a second limiting part 51, which is located between the first slider 1 and the second slider 2, and restricts the sliding stroke of the second slider 2 along the direction of the release elastic element. This allows the second slider 2 to remain in its initial position during the first closing phase, facilitating the pre-compression of the elastic element. Preferably, the second slider 2 has a hollow structure with one open end and the other closed end. The second limiting part 51 is always engaged within the second slider 2. Specifically, the second limiting part 51 enters the second slider 2 from one end, and the two maintain relative motion during the sliding of the second slider 2. When the second slider 2 slides to its limit position along the direction of the release elastic element, the second limiting part 51 stops against the inner wall of the other end of the second slider 2, thereby restricting the second slider 2 from continuing to slide along the direction of the release elastic element. This design helps save space occupied by the device in the sliding direction of the second slider 2, thus facilitating the miniaturization of the device.

[0046] In a preferred embodiment, the first limiting part 61 is adjustable to facilitate adjustment of the preload of the elastic element (i.e., the compression spring 3). In this embodiment, the support component includes a screw 4, and a first guide sleeve 5 and a second guide sleeve 6 sequentially threaded to the screw 4 along the direction of compressing the elastic element. A first slider 1 is slidably sleeved outside the first guide sleeve 5, and a second slider 2 is slidably sleeved outside the second guide sleeve 6. The first limiting part 61 is located on the second guide sleeve 6. Specifically, the first limiting part 61 is located at the end of the second guide sleeve 6 away from the first guide sleeve 5, and the first limiting part 61 is a ring of boss structure protruding from the outer wall of the second guide sleeve 6, and is integrally formed with the second guide sleeve 6. The elastic element (i.e., the compression spring 3) is sleeved outside the second guide sleeve 6, and its two ends abut against the second slider 2 and the first limiting part 61, respectively. Therefore, when it is necessary to adjust the position of the first limiting part 61, it is only necessary to rotate the second guide sleeve relative to the screw 4 to adjust the preload of the compression spring 3. This design allows for a larger radial dimension of the compression spring 3. In other embodiments, a nut can be used instead of a first limiting part, but since the radial dimension of a conventional standard nut is relatively small, the radial dimension of the compression spring 3 will be limited. The aforementioned second limiting part 51 is provided on the first guide sleeve 5. Specifically, the second limiting part 51 is provided at one end of the first guide sleeve 5 near the second guide sleeve 6, and the second limiting part 51 is a ring of boss structure protruding from the outer wall of the first guide sleeve 5, and is integrally formed with the first guide sleeve 5.

[0047] Furthermore, at least one anti-loosening nut 7 is threadedly connected to the screw 4 on the side of the first limiting part 61 opposite to the compression spring 3 or at the end of the second guide sleeve 6 away from the first guide sleeve 5, to prevent the first guide sleeve 5 from loosening. Specifically, in this embodiment, the anti-loosening nut 7 is fitted at the end of the second guide sleeve 6 away from the first guide sleeve 5, and the anti-loosening nut 7 can be one or more, such as two.

[0048] In a preferred embodiment, the support component (i.e., screw 4) is connected to the fixed part of the switchgear using a mounting component, preferably the frame of the switchgear. The mounting component specifically includes a mounting block 8 fixedly connected to the support component and a mounting bracket 9 mounted on the fixed part (i.e., the frame). The mounting block 8 can be fixedly connected to the mounting bracket 9 or rotatably connected to the mounting bracket 9, and the rotation axis of the mounting block 8 is perpendicular to the sliding direction of the sliding component. This design allows the present invention to meet both linear and rotary operating conditions.

[0049] In this embodiment, the mounting block 8 is threaded to one end of the screw 4 near the compression spring 3, and each of the two outer surfaces of the mounting block 8 facing away from the other is provided with a convex shaft 81. The two convex shafts 81 are coaxial and perpendicular to the sliding direction of the sliding component. The structure of the mounting bracket 9 is as follows: Figure 9 As shown, the mounting bracket 9 has a mounting groove 911, in which the mounting block 8 is fixedly or rotatably connected. Specifically, the mounting bracket 9 includes a mounting base 91 and a cover plate 92. The mounting base 91 has a mounting groove 911, which is approximately U-shaped. The opposite side walls of the mounting groove 911 have notches 912 corresponding to the convex shafts 81 of the mounting block 8. During installation, the mounting block 8 is first inserted into the mounting groove 911, and the convex shafts 81 on both sides of the mounting block 8 are respectively placed into the corresponding notches 912. Then, the cover plate 92 is connected to the groove opening of the mounting base 91, thereby preventing the convex shafts 81 from disengaging from the notches 912. The cover plate 92 has a clearance opening corresponding to the mounting block 8, which does not restrict the rotation of the mounting block 8 around the axis of its convex shaft 81. Finally, the mounting base 91 is installed on the corresponding part of the switchgear frame using fasteners (such as screws or bolt assemblies).

[0050] This utility model discloses an auxiliary device for opening and closing switching equipment, which can be applied to switching equipment such as circuit breakers, especially large-capacity circuit breakers. In this embodiment, the utility model is used as an example for application to a circuit breaker, and its working principle is explained in conjunction with a circuit breaker. In this case, the moving part can be the operating mechanism of the circuit breaker, or it can be the transmission mechanism of the circuit breaker used to drive the moving contact to open and close. In this embodiment, the moving part is exemplified by a transmission mechanism, which includes a crank arm (not shown in the figure), which is rotatably connected to the sliding part through a shaft hole fit.

[0051] When the moving contact of the circuit breaker is in the open position, there is a preset gap between the first slider 1 and the second slider 2, and the compression spring 3 is in a pre-compressed state. Figure 5 , Figure 6As shown. When the circuit breaker starts closing, the transmission mechanism begins to drive the moving contact in the closing direction. At the same time, the transmission mechanism drives the first slider 1 to slide in the direction of compressing the spring 3. When the first closing stage of the closing process ends, the moving contact just contacts the stationary contact, and the first slider 1 contacts the second slider 2. During this process, the spring 3 does not participate in the transmission process, and the load is zero. As the transmission mechanism continues to move in the closing direction, the second closing stage begins, realizing contact overtravel. At the same time, the first slider 1 continues to slide under the drive of the transmission mechanism, pushing the second slider 2 to slide, thereby compressing the spring 3 to store energy, as shown. Figure 7 , Figure 8 As shown. Therefore, during the closing process of the moving contact, the compression spring 3 only participates in the transmission process at the end of the closing process (i.e., the second closing stage), in order to accumulate capacity for opening.

[0052] When the circuit breaker initiates tripping, the transmission mechanism drives the moving contact to move in the tripping direction. Simultaneously, the transmission mechanism drives the first slider 1 to slide in the direction of releasing the pressure spring 3. The pressure spring 3 quickly releases its stored energy, which pushes the first slider 1 to slide rapidly in the direction of releasing the pressure spring 3 through the second slider 2, causing the transmission mechanism to drive the moving contact to trip quickly. This is the first tripping stage. After the first slider 1 separates from the second slider 2, the second tripping stage begins, and the pressure spring 3 no longer provides energy for the second closing stage. Therefore, the energy of the pressure spring 3 in this invention can be released in the most critical tripping stage, effectively solving the cost increase problem caused by the increased strength requirements of the tripping buffer and overall structure due to the increased energy of the tripping spring in the original solution. Through this design, the tripping speed is significantly improved, so that the energy of the contact spring used to maintain contact pressure does not need to be increased, thereby reducing the strength requirements of the contact spring and significantly saving R&D costs. In addition, this invention only plays a role at the end of the closing stage, with minimal impact on the closing speed. It can achieve the desired effect without major modifications to the transmission mechanism of the circuit breaker, further reducing R&D costs. More importantly, by using the pre-compression design of the compression spring 3 and limiting the function of the compression spring 3 during its action phase, this utility model can concentrate energy for use in the initial stage of circuit breaking, thus avoiding a significant increase in the energy requirements for the oil buffer.

[0053] When switching equipment increases closing energy to improve closing speed, excessively high closing energy may adversely affect the equipment's performance and lifespan. In this case, the opening and closing auxiliary device of this invention cleverly intervenes to offset some of the excess closing energy, thereby effectively balancing the energy difference between closing and opening processes. This ensures that the switching equipment can still achieve smooth and reliable opening operations while closing at high speed, thus optimizing the overall performance of the equipment and extending its service life.

[0054] This invention allows for flexible adjustment of the pre-compression of the spring 3 by modifying the dimensions of its components, thereby precisely controlling the energy provided by the spring 3 during the opening and closing process to meet the characteristic requirements of different circuit breakers. Furthermore, the pre-compression adjustment mechanism allows for adjustment of the pre-compression of the spring 3 without changing its dimensions, ensuring it matches the energy and load required by the circuit breaker. This invention also allows for adjustment of the timing of the spring 3's energy intervention during the opening and closing stages by controlling the dimensions of the first slider 1 and the second slider 2.

[0055] In circuit breakers without this invention, increasing the contact spring energy is necessary to improve the tripping speed. This results in the contact spring bearing greater force, thus requiring higher strength from the contact spring. This invention, however, transfers some of the increased force to the mounting bracket 9, allowing the circuit breaker frame to ultimately bear this force, thereby reducing the research and development costs for high-strength contact springs. As an external device independent of the original circuit breaker, this invention facilitates replacement and maintenance. The entire device can be easily disassembled by simply loosening the fasteners on the mounting bracket 9, making maintenance and replacement convenient.

[0056] Example 2

[0057] Please see Figure 9 , Figure 10 As shown, the opening and closing auxiliary device for a switchgear according to this utility model differs from the first embodiment described above in that: the supporting component (i.e., screw 4), the sliding component (i.e., first slider 1, second slider 2), and the elastic component (i.e., compression spring 4) cooperate to form a set of auxiliary units, and multiple auxiliary units are provided, arranged side by side. In this embodiment, two auxiliary units are used as an example, but it is not limited to this.

[0058] In this embodiment, the first slider 1 of each auxiliary unit can be integrally formed or fixed together, so that each auxiliary unit can move synchronously; each auxiliary unit can share a mounting bracket 9, making the overall installation faster.

[0059] Therefore, this utility model can combine multiple auxiliary units in parallel to adapt to the energy requirements of different circuit breakers and achieve support for a variety of circuit breakers.

[0060] The present invention provides a circuit breaker, which includes the tripping auxiliary switch as described in any of the above embodiments, and the circuit breaker constitutes the switching device.

[0061] For the structure and working principle of the opening and closing auxiliary device for switchgear, please refer to the previous description section; it will not be repeated here.

[0062] The present invention relates to an auxiliary device for opening and closing a switchgear and a circuit breaker. The parts not covered herein are the same as or can be implemented using existing technologies.

[0063] The above embodiments are only used to further illustrate the opening and closing auxiliary device and circuit breaker of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An auxiliary device for opening and closing a switchgear, characterized in that: include: Support components; A sliding component is slidably disposed on a support component in a preset direction and is linked with a moving component of a switching device for performing opening and closing operations, so as to be driven to slide by the moving component; An elastic element is disposed between the sliding component and the first limiting portion provided on the supporting component, and can be compressed by the sliding component along the preset direction; The closing process of the switchgear includes a first closing stage and a second closing stage. In the first closing stage, the sliding component does not compress or further compress the elastic element. In the second closing stage, the sliding component slides and compresses the elastic element, causing the elastic element to store energy. When the switchgear is opened, the elastic element releases the stored energy.

2. The switching equipment opening and closing auxiliary device according to claim 1, characterized in that: The first closing stage is the process of the moving contact of the switchgear moving from the starting position to contact the stationary contact of the switchgear, and the second closing stage corresponds to the overtravel stage of the moving contact; the opening process of the switchgear includes a first opening stage and a second opening stage in sequence, and the elastic element completes the energy storage release in the first opening stage; the elastic element is in a pre-compression state in the first closing stage.

3. The switching equipment opening and closing auxiliary device according to claim 1, characterized in that: The sliding component and the moving component are rotatably connected by a shaft hole fit.

4. The switching equipment opening and closing auxiliary device according to any one of claims 1-3, characterized in that: The sliding component includes a first slider and a second slider that are sequentially distributed along the direction of compressing the elastic element. The first slider is connected to the moving component, and the elastic element is disposed between the second slider and the first limiting part. In the first closing phase, only the first slider slides in the direction of compressing the elastic element. In the second closing phase, the first slider pushes the second slider to slide and compresses the elastic element.

5. The switching equipment opening and closing auxiliary device according to claim 4, characterized in that: When the switching device is in the open state, there is a preset distance between the first slider and the second slider; the support component is provided with a second limiting part, which is located between the first slider and the second slider, and limits the sliding stroke of the second slider along the direction of releasing the elastic element.

6. The switching equipment opening and closing auxiliary device according to claim 5, characterized in that: The second slider has a hollow structure with one end open and the other end narrowed, and the second limiting part is located inside the second slider.

7. The switching equipment opening and closing auxiliary device according to claim 4, characterized in that: The first limiting part is adjustable to adjust the preload of the elastic element; the supporting component includes a screw and a first guide sleeve and a second guide sleeve that are threaded to the screw in sequence along the direction of compressing the elastic element; the first slider is slidably sleeved outside the first guide sleeve, and the second slider is slidably sleeved outside the second guide sleeve; the first limiting part is provided on the second guide sleeve, and the first guide sleeve is provided with a second limiting part to limit the sliding stroke of the second slider along the direction of releasing the elastic element; the elastic element is sleeved outside the second guide sleeve, and the elastic element is a compression spring.

8. The switching equipment opening and closing auxiliary device according to claim 7, characterized in that: The screw is threaded with at least one anti-loosening nut on the side of the first limiting part opposite to the elastic element or at the end of the second guide sleeve away from the first guide sleeve; the first limiting part is a ring of boss structure protruding on the outer wall of the second guide sleeve, and the second limiting part is a ring of boss structure protruding on the outer wall of the first guide sleeve.

9. The switching equipment opening and closing auxiliary device according to claim 1, characterized in that: The support component is connected to the fixed part of the switchgear by an installation component; the installation component includes a mounting block fixedly connected to the support component and a mounting frame installed on the fixed part. The mounting block is fixedly connected to the mounting frame, or the mounting block is rotatably connected to the mounting frame, and the rotation axis of the mounting block is perpendicular to the sliding direction of the sliding component.

10. The switching equipment opening and closing auxiliary device according to claim 1, characterized in that: The supporting component, sliding component, and elastic element cooperate to form a set of auxiliary units, and there are multiple auxiliary units arranged in parallel.

11. A circuit breaker, characterized in that: The circuit breaker comprises the circuit breaker itself, including the circuit breaker opening and closing auxiliary device for the switching equipment as described in any one of claims 1-10.

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