Slow-opening and slow-closing device for vacuum arc-extinguishing chamber circuit breaker

Abstract

The invention discloses a slow-opening and slow-closing device for a vacuum arc-extinguishing chamber circuit breaker, which belongs to the field of high-voltage switches of electrical equipment and comprises a support plate detachably connected with a spring operating mechanism of the vacuum arc-extinguishing chamber circuit breaker, a screw is rotatably connected onto the support plate, one end of the screw is in threaded connection with a bottom plate used for abutting against and locking a crank arm of the circuit breaker, and the other end of the screw is in threaded connection with the bottom plate. And the screw rod is rotated to adjust the distance between the spring operating mechanism and the circuit breaker. According to the invention, multi-dimensional position fixation of height and angle is realized through bolt connection of the support plate and the lifting hole, the installation requirements of vacuum arc-extinguishing chamber circuit breakers of different models can be met, the compatibility problem caused by the size difference of the circuit breakers in a traditional tool is solved, tool customization is not needed, and the equipment cost is obviously reduced.

Description

Technical Field

[0001] The present invention belongs to the field of high-voltage switches for power equipment, and particularly relates to a slow opening and closing device for a vacuum interrupter circuit breaker. Background Art

[0002] A vacuum interrupter circuit breaker is an important switching device in the power system. Its core components include a vacuum interrupter circuit breaker and a spring operating mechanism. In practical applications, the circuit breaker needs to perform opening and closing operations to control the on-off of the circuit. Traditional opening and closing operations usually rely on the rapid action of the spring operating mechanism. However, during installation, commissioning, and maintenance, the rapid action may cause equipment damage or inconvenient operation.

[0003] Therefore, it is urgent to design a slow opening and closing device for a vacuum interrupter circuit breaker to solve the problems that the rapid action may cause equipment damage or inconvenient operation mentioned above. Summary of the Invention

[0004] To solve the technical problems mentioned in the background art, a slow opening and closing device for a vacuum interrupter circuit breaker is provided to solve the above problems.

[0005] To achieve the above object, the specific technical solution of the slow opening and closing device for a vacuum interrupter circuit breaker of the present invention is as follows: A slow opening and closing device for a vacuum interrupter circuit breaker includes a support plate detachably connected to the spring operating mechanism of the vacuum interrupter circuit breaker. A screw rod is rotatably connected to the support plate. One end of the screw rod is screwed with a bottom plate for abutting and locking the crank arm of the circuit breaker. By rotating the screw rod, the distance between the spring operating mechanism and the circuit breaker can be adjusted.

[0006] Further, the support plate includes a horizontal plate and a vertical plate. The horizontal plate and the vertical plate are fixedly connected. The horizontal plate is rotatably connected to the screw rod, and the vertical plate is connected to the spring operating mechanism.

[0007] Further, the horizontal plate includes a first horizontal plate and a horizontal lock channel block. A first opening is formed on the first horizontal plate. After the horizontal lock channel block is threadedly connected to the first horizontal plate, the first opening and the horizontal lock channel together form a screw rod groove for accommodating the screw rod. The screw rod groove is rotatably connected to the screw rod, so that the screw rod is detachably and rotatably connected to the horizontal plate.

[0008] Further, a first hexagonal head and a second hexagonal head are provided on the screw rod. The first hexagonal head and the second hexagonal head are located on both sides of the horizontal plate, so as to limit the position of the screw rod and the support plate in the vertical direction.

[0009] Further, a thrust bearing is provided between the first hexagonal head and the horizontal plate. By rotating the first hexagonal head, the screw rod can evenly transmit the force to the support plate.

[0010] Further, a micro lubrication channel is provided inside the thrust bearing, and grease is provided inside the micro lubrication channel.

[0011] Further, a first through hole is provided on the vertical plate, and the first through hole is matched with the lifting hole on the spring operating mechanism. The first bolt passes through the first through hole and is screwed with the lifting hole, so that the support plate and the spring operating mechanism are detachably connected.

[0012] Further, an opening is provided on the bottom plate to avoid the connecting rod of the breaker toggle arm.

[0013] Further, a groove pattern matching the breaker toggle arm is provided on the bottom plate, so that the bottom plate and the breaker toggle arm are abutted and fixed.

[0014] Further, the support plate, the screw rod and the bottom plate are all subjected to surface oxidation treatment.

[0015] The slow opening and closing device for a vacuum interrupter circuit breaker of the present invention has the following advantages: The present invention realizes multi-dimensional position fixing of height and angle through the bolt connection between the support plate and the lifting hole, can adapt to the installation requirements of different models of vacuum interrupter circuit breakers, solves the compatibility problem caused by the size difference of traditional toolings for circuit breakers, eliminates the need for tooling customization, and significantly reduces the equipment cost.

[0016] The present invention realizes low-speed and high-precision transmission through the cooperation of the screw rod and the thrust bearing, eliminates the backlash of the traditional lead screw transmission, has no creeping phenomenon during low-speed movement, improves the transmission efficiency, and the transmission has stability. Description of the Drawings

[0017] Figure 1 is a schematic use diagram of the slow opening and closing device for a vacuum interrupter circuit breaker of the present invention; Figure 2 is a schematic structural diagram of the slow opening and closing device for a vacuum interrupter circuit breaker of the present invention; Figure 3 is a schematic structural diagram of the support plate of the present invention; Figure 4 is a schematic structural diagram of the bottom plate of the present invention.

[0018] Explanation of the marks in the figure: 1. Support plate; 101. Horizontal plate; 1011. First horizontal plate; 1012. Horizontal lock block; 1013. First opening; 102. Vertical plate; 1021. First through hole; 1022. First bolt; 2. Screw rod; 201. First hexagon head; 202. Second hexagon head; 3. Bottom plate; 301. Opening; 302. Groove pattern; 4. Spring operating mechanism; 401. Lifting hole; 5. Breaker toggle arm; 501. Connecting rod; 6. Mechanism support plate; 7. Thrust bearing. Detailed Embodiments

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0021] The following refers to the attached Figure 1 to the attached Figure 4 Describe the slow opening and closing device for a vacuum interrupter circuit breaker of the present invention.

[0022] Traditional opening and closing operations usually rely on the rapid action of the spring operating mechanism 4. However, during installation, commissioning, and maintenance, the rapid action may cause equipment damage or inconvenient operation.

[0023] Therefore, the present invention provides a slow opening and closing device for a vacuum interrupter circuit breaker. As Figure 1 shown, it includes a support plate 1 detachably connected to the spring operating mechanism 4 of the vacuum interrupter circuit breaker. A screw rod 2 is rotatably connected to the support plate 1. One end of the screw rod 2 is screwed with a bottom plate 3 for abutting and locking the circuit breaker toggle arm 5. By rotating the screw rod 2, the distance between the spring operating mechanism 4 and the circuit breaker is adjusted. Specifically, the bottom plate 3 supports the circuit breaker toggle arm 5, the support plate 1 is connected to the spring operating mechanism 4, and by rotating the screw rod 2, the screw rod 2 drives the bottom plate 3 to act on the circuit breaker toggle arm 5 to achieve slow opening and closing operations.

[0024] Preferably, as Figure 1 and Figure 2 shown, the support plate 1 includes a horizontal plate 101 and a vertical plate 102. The horizontal plate 101 and the vertical plate 102 are fixedly connected. The horizontal plate 101 is rotatably connected to the screw rod 2, and the vertical plate 102 is connected to the spring operating mechanism 4, further optimizing the transmission and adjustment process.

[0025] Preferably, as Figure 3As shown in the figure, the horizontal plate 101 includes a first horizontal plate 1011 and a horizontal locking channel block 1012. A first opening 1013 is formed on the first horizontal plate 1011. After the horizontal locking channel block 1012 is threadedly connected to the first horizontal plate 1011, the first opening 1013 and the horizontal locking channel jointly form a screw groove for accommodating the screw 2. The screw groove is rotatably connected to the screw 2, so that the screw 2 is detachably and rotatably connected to the horizontal plate 101. Specifically, the first opening 1013 is formed on the first horizontal plate 1011 and threadedly connected to the horizontal locking channel block 1012 to form a screw groove, which realizes effective limiting and rotational support for the screw 2 and reduces the operation error caused by the deviation of the screw 2.

[0026] Preferably, as Figure 2 shown in the figure, a first hexagonal head 201 and a second hexagonal head 202 are provided on the screw 2. The first hexagonal head 201 and the second hexagonal head 202 are located on both sides of the horizontal plate 101, so as to limit the position of the screw 2 and the support plate 1 in the vertical direction, prevent the screw 2 from sliding or deviating in the vertical direction. At the same time, the design of the hexagonal head facilitates the use of operating tools and improves the convenience of adjustment. Optionally, the material of the hexagonal head is selected as 45# round steel. After machining, it is quenched and tempered to 28 - 32HRC, the surface is oxidized, and the hexagonal head is quenched and tempered, so as to optimize the internal performance of the hexagonal head, which can improve strength and toughness, obtain high hardness through quenching, and then reduce brittleness through high-temperature tempering, balance the strength and toughness of the material, and avoid deformation and fracture of the hexagonal head due to impact or fatigue stress during frequent opening and closing operations. The external protection ability of the hexagonal head is improved through surface oxidation treatment, that is, the corrosion resistance is enhanced, rust is prevented, the service life is extended, the wear resistance is improved, the maintenance frequency is reduced, the lubrication effect of the oxide film reduces surface adhesion, prevents biting, and prevents the jamming of moving parts. Through the combination of quenching and tempering and oxidation, the hexagonal head can work stably for a long time during the use of the slow opening and closing tooling, ensuring safe production.

[0027] Preferably, as Figure 2As shown in the figure, a thrust bearing 7 is provided between the first hexagonal head 201 and the horizontal plate 101. By rotating the first hexagonal head 201, the screw 2 can evenly transfer the force to the support plate 1, which not only improves the evenness of the force during the transmission process, but also reduces the friction and wear between components, and enhances the overall operation efficiency. Optionally, the thrust bearing 7 is a thrust cylindrical roller bearing. The axial load transfers the thrust load through the first hexagonal head 201 to the shaft ring, the shaft ring transfers it to the rollers, and the rollers evenly distribute the force to the seat ring, and finally transfer it to the bearing seat, and then to the support plate 1, avoiding the deformation or damage of the tooling caused by local stress concentration. At the same time, the rollers roll between the shaft ring and the seat ring, reducing sliding friction, which is exactly suitable for the medium and low speed, high load motion scenario of this device. At the same time, the transmission accuracy is improved through the thrust cylindrical roller bearing. Among them, the rollers of the thrust bearing 7 are treated by a special process composite to improve the surface hardness and wear resistance coefficient.

[0028] Preferably, a micro lubrication channel is provided in the thrust bearing 7, and lubricating grease is provided in the micro lubrication channel, ensuring the long-term stable operation of the thrust bearing 7, reducing the risk of failure caused by insufficient lubrication, realizing timed and quantitative oil supply to play a lubricating role, and solving the problem that traditional lubrication is prone to dry up or requires an external system.

[0029] Preferably, as Figures 1-3 shown in the figure, a first through hole 1021 is opened on the vertical plate 102, and the first through hole 1021 is matched with the hanging hole 401 on the spring operating mechanism 4. The first bolt 1022 passes through the first through hole 1021 and is screwed with the hanging hole 401, so that the support plate 1 and the spring operating mechanism 4 are detachably connected, improving the connection accuracy and reliability between the support plate 1 and the spring operating mechanism 4.

[0030] Preferably, as Figure 4 shown in the figure, an opening 301 is provided on the bottom plate 3 to avoid the connecting rod 501 of the circuit breaker crank arm 5. Specifically, an opening 301 is provided on the bottom plate 3 to avoid the connecting rod 501 of the circuit breaker crank arm 5, avoiding operation obstacles caused by structural interference, and optimizing the matching relationship between the bottom plate 3 and the circuit breaker.

[0031] Preferably, the bottom plate 3 is provided with groove lines 302 matching the circuit breaker crank arm 5, so that the bottom plate 3 and the circuit breaker crank arm 5 are abutted and fixed, improving the fixing reliability between the bottom plate 3 and the circuit breaker crank arm 5, and reducing operation errors caused by poor contact.

[0032] Preferably, the support plate 1, the screw 2 and the bottom plate 3 are all subjected to surface oxidation treatment to enhance the external protection ability of the structure, that is, enhance corrosion resistance, prevent rust, and extend the service life.

[0033] The working principle of the present invention: When the circuit breaker is assembled in the closed state, the spring of the overtravel spring assembly of the circuit breaker toggle arm 5 is in a pre-compressed state and has a certain spring force. In this case, the circuit breaker toggle arm 5 is lifted by the bottom plate 3 so that the bottom plate 3 is located between the circuit breaker toggle arm 5 and the mechanism support plate 6. After the circuit breaker toggle arm 5 is subjected to the upward pulling force of the bottom plate 3, it drives the connecting rod 501, and the connecting rod 501 drives the overtravel spring to overcome the spring force during pre-compression, so that the circuit breaker toggle arm 5 is connected to the mechanism toggle arm, thereby smoothly connecting the circuit breaker body and the spring operating mechanism 4.

[0034] After the circuit breaker body and the spring operating mechanism 4 are connected, it is necessary to observe and detect the mechanical and electrical properties of the equipment in the low-speed motion state, including observing the component actions: during slow operation, it is possible to directly observe whether the actions of mechanical components such as the transmission mechanism, the connecting rod 501, the spring, and the contacts are smooth, and whether there are jams, wear, and deformations. During the commissioning and parameter calibration of the circuit breaker, through slow-motion operations, the opening and closing times and speeds are accurately adjusted to ensure compliance with the design requirements. The specific operation is as follows: the spring operating mechanism 4 is in a state allowing slow opening and closing actions, and the circuit breaker toggle arm 5 of the vacuum interrupter and the toggle arm of the spring operating mechanism 4 are not yet connected. Under such working conditions, the bottom plate 3 supports the circuit breaker toggle arm 5, and the support plate 1 and the hanging hole 401 are firmly connected by the first bolt 1022. Use an open-end wrench to rotate the first hexagon head 201. During the rotation of the first hexagon head 201, the screw rod 2 drives the bottom plate 3 to act on the circuit breaker toggle arm 5 to achieve slow opening and closing operations.

[0035] The present invention realizes multi-dimensional position fixation of height and angle through the bolt connection between the support plate 1 and the hanging hole 401, can adapt to the installation requirements of different models of vacuum interrupter circuit breakers, solves the compatibility problem caused by the size difference of traditional toolings for circuit breakers, eliminates the need for tooling customization, and significantly reduces the equipment cost.

[0036] The present invention realizes low-speed high-precision transmission through the cooperation of the screw rod 2 and the thrust bearing 7, eliminates the backlash of traditional lead screw transmission, has no crawling phenomenon during low-speed movement, improves the transmission efficiency, and the transmission has stability.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A slow opening and closing device for a vacuum interrupter circuit breaker, characterized in that, It includes a support plate detachably connected to the spring operating mechanism of the vacuum interrupter circuit breaker. A screw rod is rotatably connected to the support plate. One end of the screw rod is screwed with a bottom plate for abutting and locking the crank arm of the circuit breaker. Rotate the screw rod to adjust the distance between the spring operating mechanism and the circuit breaker.

2. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 1, characterized in that, The support plate includes a horizontal plate and a vertical plate. The horizontal plate and the vertical plate are fixedly connected. The horizontal plate is rotatably connected to the screw rod, and the vertical plate is connected to the spring operating mechanism.

3. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 2, wherein, The horizontal plate includes a first horizontal plate and a horizontal lock channel block. A first opening is provided on the first horizontal plate. After the horizontal lock channel block is threadedly connected to the first horizontal plate, the first opening and the horizontal lock channel together form a screw rod groove for accommodating the screw rod. The screw rod groove is rotatably connected to the screw rod, so that the screw rod is detachably and rotatably connected to the horizontal plate.

4. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 2, characterized in that, The screw rod is provided with a first hexagon head and a second hexagon head. The first hexagon head and the second hexagon head are located on both sides of the horizontal plate, so as to limit the position of the screw rod and the support plate in the vertical direction.

5. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 4, wherein A thrust bearing is provided between the first hexagon head and the horizontal plate. Rotate the first hexagon head, so that the screw rod evenly transmits the force to the support plate.

6. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 5, characterized in that, A micro lubrication channel is provided in the thrust bearing, and grease is provided in the micro lubrication channel.

7. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 2, characterized in that, A first through hole is provided on the vertical plate. The first through hole matches the lifting hole on the spring operating mechanism. A first bolt passes through the first through hole and is screwed with the lifting hole, so that the support plate is detachably connected to the spring operating mechanism.

8. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 1, characterized in that, An opening is provided on the bottom plate to avoid the connecting rod of the crank arm of the circuit breaker.

9. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 8, wherein The bottom plate is provided with groove lines matching the crank arm of the circuit breaker, so that the bottom plate is abutted and fixed to the crank arm of the circuit breaker.

10. The slow opening and closing device for a vacuum interrupter circuit breaker according to claim 1, characterized in that, The support plate, the screw rod and the bottom plate are all subjected to surface oxidation treatment.

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