Slow switching-on and switching-off device for 800kV isolating switch

Abstract

The utility model relates to a slow opening and closing device for an 800kV disconnecting switch, which comprises a fixedly arranged support, an execution shaft and an operation shaft, the execution shaft and the operation shaft are rotatably arranged on the support, the execution shaft is fixedly provided with a driven gear, the operation shaft is fixedly provided with a driving gear meshed with the driven gear, and the driving gear is meshed with the driven gear. The reference diameter of the driven gear is larger than that of the driving gear; the output end of the execution shaft is provided with a U-shaped groove with an opening facing the side where the angle-type disconnecting switch is located, and the U-shaped groove is matched with an output shaft of a spring energy storage mechanism of the angle-type disconnecting switch. According to the speed reduction principle of gear meshing, huge opening and closing force of the moving contact is converted into force capable of being manually shaken by a person on the side of the pinion, labor is saved, the opening and closing speed of the switch is reduced, the moving contact and the static contact are slowly closed, and the static contact is prevented from being damaged by first closing due to too high speed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a slow opening and closing debugging device for high-voltage electrical equipment, specifically a slow opening and closing device for an 800kV disconnector. Background Art

[0002] With the continuous advancement of my country's power system technology, the research and development capabilities of major high-voltage electrical appliance manufacturing companies have been continuously enhanced, and the high-voltage switch structure has become more reasonable and the performance has become more reliable. The use of ultra-high voltage transmission lines, such as 800kV transmission lines, can not only promote the upgrading of my country's power grid technology, improve the efficiency and economy of long-distance large-capacity transmission, and save transmission corridor resources, but also help to enhance the independent innovation capabilities of my country's power transmission and transformation manufacturing industry.

[0003] The transmission capacity of UHV transmission lines is largely determined by the stability of the power system. As an important component in the power system, the stability of the operation of enclosed combined electrical disconnector equipment plays a key role in the entire UHV power supply system.

[0004] The 800kV disconnector currently in operation uses a fast spring mechanism with a multi-link to drive the moving and static contacts to achieve opening and closing, and has the characteristics of fast opening and closing speed. However, there are certain errors in the processing and assembly of the moving and static contacts. If the spring mechanism is used directly for rapid opening and closing after assembly, once the moving and static contacts collide beyond the allowable range, it will cause the contacts to be repaired and redone, resulting in huge time and financial costs, leading to project delays and over-budget. Therefore, it is necessary to design a slow opening and closing device to facilitate the inspection of the centering accuracy of the moving and static contacts after assembly and avoid contact collision damage. Although there are some slow opening and closing tooling or test devices in the existing patents, the structures are relatively complex and inconvenient to use in practice. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a slow opening and closing device for moving and static side contacts of 800kV GIS disconnecting switch equipment, which ensures the centering accuracy of the moving and static sides and avoids contact damage during the first opening and closing.

[0006] The utility model is realized by the following technical scheme, and provides a slow opening and closing device for an 800kV disconnector, comprising a fixed bracket, and an execution shaft and an operating shaft rotatably arranged on the bracket, wherein a driven gear is fixedly mounted on the execution shaft, and a driving gear meshing with the driven gear is fixedly mounted on the operating shaft, and the pitch circle diameter of the driven gear is larger than the pitch circle diameter of the driving gear; a U-shaped groove opening toward the side where the angular disconnector is located is provided at the output end of the execution shaft, and the U-shaped groove is adapted to the output shaft of the spring energy storage mechanism of the angular disconnector; and the input end of the operating shaft is located at a side of the bracket away from the angular disconnector.

[0007] When using this solution, fix the bracket and clamp the opening of the U-shaped groove on the output shaft of the spring energy storage mechanism of the angular disconnector. Since the output shaft of the spring energy storage mechanism is a square shaft or a hexagonal shaft, it can be rotated synchronously with the U-shaped groove. The input end of the rotating operating shaft is used to drive the driven gear to rotate, thereby driving the actuator shaft to rotate. By setting the pitch circle diameter of the driven gear to be larger than the pitch circle diameter of the driving gear, the actuator shaft is decelerated. The actuator shaft drives the output shaft of the spring energy storage mechanism to rotate at a low speed through the U-shaped groove, and the slow opening and closing of the moving and static side contacts is achieved.

[0008] As an optimization, the bracket includes two oppositely arranged vertical plates, the driving gear and the driven gear are both located between the two vertical plates, bearings adapted to the execution shaft and the operating shaft are installed on the vertical plates, the lower ends of the two vertical plates are fixed to the same base, and the base is detachably fixed to the housing of the angle-type isolating switch. The bracket structure of this optimization scheme is simple and the manufacturing cost is low. In addition, the driving gear and the driven gear are arranged between the two vertical plates, which improves the stability of the device; the base is detachably fixed to the housing of the angle-type isolating switch, and there is no need to set up an additional base fixing device, which is more convenient to use and also convenient for repeated use of the slow separation and slow combination device of this scheme.

[0009] As an optimization, the base includes a support plate fixed to the vertical plate, and a connecting plate fixed to the support plate, the connecting plate is fixed to the connecting flange on the housing of the angle-type disconnector by bolts, and a reinforcing rib plate is welded to the bottom surface of the support plate, and the reinforcing rib plate is welded to the connecting plate. The base of this optimization solution uses the support plate to provide support for the vertical plate, and is connected to the connecting flange on the housing of the angle-type disconnector through the connecting plate. The structure is simple and easy to disassemble and assemble. The structural strength of the base is improved by setting the reinforcing rib plate, and the stability of the slow opening and closing device during use is further guaranteed.

[0010] As an optimization, the driven gear is provided with a plurality of positioning holes distributed along the circumferential direction, and the vertical plate is provided with a limit pin shaft passing through the positioning holes. This optimization scheme sets a limit pin shaft and a positioning hole, and when the driven gear rotates a certain angle, the limit pin shaft passes through the vertical plate and the positioning hole to limit the driven gear, thereby preventing the driven gear from rotating on its own.

[0011] As an optimization, a hexagonal table adapted to a torque wrench is provided at the input end of the operating shaft. This optimization solution facilitates the use of a torque wrench to apply force, thereby facilitating the measurement of torque magnitude by providing a hexagonal table adapted to a torque wrench at the input end of the operating shaft.

[0012] The beneficial effects of the utility model are as follows: by utilizing the deceleration principle of gear meshing, the huge opening and closing force of the moving contact is converted into a force that can be manually shaken by a person on the small gear side, thereby saving effort and reducing the speed of switch opening and closing, so that the moving and static contacts are slowly closed, and excessive speed is prevented from causing the static contact to be damaged by the first closing; the design structure is simple, the cost is low, and the processing and installation are convenient; the problem that the main mechanism does not have slow opening and closing is solved, damage to the moving and static contacts is avoided, and a large amount of manpower and material costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the use state of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model;

[0015] As shown in the figure:

[0016] 1. Angle isolating switch, 2. Actuator shaft, 3. Bracket, 4. Base, 5. Vertical plate, 6. Driven gear, 7. Bearing, 8. Limit pin shaft, 9. Operating shaft, 10. Driving gear, 11. U-shaped groove. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0018] like Figure 1 The slow opening and closing device for an 800kV disconnector shown in the figure comprises a fixed bracket 3, and an actuator shaft 2 and an operating shaft 9 rotatably arranged on the bracket. The actuator shaft 2 is located above the operating shaft 9. Bearings are nested and installed on the bracket for the actuator shaft 2 and the operating shaft 9 to pass through, so as to reduce the friction resistance during operation. By gently shaking the operating shaft, the actuator shaft can have a slower speed and a larger torque through the deceleration of large and small gears, thereby driving the moving contact of the main body to achieve slow opening and closing.

[0019] A driven gear 6 is fixedly mounted on the execution shaft 2, and a driving gear 10 meshing with the driven gear 6 is fixedly mounted on the operating shaft 9. The pitch circle diameter of the driven gear 6 is larger than the pitch circle diameter of the driving gear 10 to achieve deceleration. As a preferred solution, the tooth number ratio of the driven gear to the driving gear in this embodiment is 5, which can reduce the manual torque by 5 times and reduce the opening and closing speed by 5 times, making it easy to observe the centering condition during the first opening and closing process, prevent damage to the arc contacts, and protect components from damage.

[0020] Since the output shaft of the spring energy storage mechanism of the angular disconnector is a hexagonal shaft or a square shaft, in order to ensure that the output shaft of the actuator shaft and the output shaft of the spring energy storage mechanism rotate synchronously, in this embodiment, a U-shaped groove 11 opening toward the side where the angular disconnector 1 is located is opened at the output end of the actuator shaft 2, and the U-shaped groove 11 is adapted to the output shaft of the spring energy storage mechanism of the angular disconnector, and the U-shaped groove is clamped on two opposite sides of the hexagonal or square output shaft of the spring energy storage mechanism to avoid relative rotation between the output shaft of the spring energy storage mechanism and the actuator shaft of the device.

[0021] The input end of the operating shaft is located on the side of the bracket away from the angle isolating switch to facilitate the rotation of the operating shaft. The input end of the operating shaft 9 of this embodiment is provided with a hexagonal table adapted to the torque wrench to facilitate the use of the torque wrench to apply force and measure the torque of the rotating operating shaft at the same time. When in use, the torque wrench is put on the end of the operating shaft to measure the rotational torque during the rotation process, and the actual separation torque is 5 times the measured torque.

[0022] The bracket 3 includes two oppositely arranged vertical plates 5, the driving gear 10 and the driven gear 6 are both located between the two vertical plates 5, and bearings 7 adapted to the execution shaft and the operating shaft are installed on the vertical plates. The lower ends of the two vertical plates are fixedly connected to the same base 4, and the base is detachably fixed to the angle isolating switch housing.

[0023] Specifically, the base 4 includes a support plate fixed to the vertical plate, and a connecting plate fixed to the support plate. The connecting plate is fixed to the connecting flange on the angle disconnector housing by bolts. A reinforcing rib plate is also welded to the bottom surface of the support plate, and the reinforcing rib plate is welded to the connecting plate.

[0024] In order to facilitate the positioning of the driven gear, the present embodiment provides a plurality of positioning holes evenly distributed along the circumferential direction on the driven gear, and a limit pin 8 passing through the positioning holes is provided on the vertical plate. The limit pin passes through the positioning holes on the vertical plate and the driven gear to limit the rotation of the driven gear.

[0025] The operating shaft of this embodiment is a manually rotating shaft, which transmits force to the actuator shaft through the meshing of the driving gear and the driven gear. The U-shaped groove of the actuator shaft is inserted into the hexagonal output shaft of the spring energy storage mechanism of the angular isolating switch, and the operator can achieve slow separation and connection of the moving and static contacts with less force.

[0026] The slow opening and closing device of this embodiment has the following functions: 1. Slow opening and closing of the switch is achieved by meshing the driving gear and the driven gear with different pitch circle diameters; 2. Manual opening and closing of the switch is achieved without the help of external force through the meshing of large and small gears; 3. When manually rotated to the target position, the limit pin is inserted into the vertical plate and the positioning hole, and the device is locked to prevent the driven gear from rotating, which is convenient for opening and closing positioning; 4. The manual opening and closing process is carried out once to check the centering accuracy of the assembly and avoid damage and destruction of the contacts; 5. It is convenient to measure key data such as the opening position, closing stroke, arc contact opening distance and arc contact insertion amount; 6. Insert the torque wrench into the hexagonal square of the operating shaft, and obtain the torque change from opening to closing and closing to opening during the rotation process, which is convenient for mechanism debugging.

[0027] The working principle of this embodiment is: using the deceleration principle of gear meshing, the huge opening and closing force of the moving contact is converted into a force that can be manually shaken by a person on the small gear side. While saving effort, the speed of switch opening and closing is reduced, so that the moving and static contacts are closed slowly, preventing the static contact from being damaged by the first closing due to excessive speed.

[0028] The slow opening and closing device of this embodiment is applied to 800kV GIS disconnecting switch equipment. The position of the moving contact when opening and the position and stroke when closing directly affect whether the switch is effectively disconnected, whether reliable insulation is achieved and affect the service life. This device can assist in measuring and determining the opening and closing positions; in addition, the moving contact itself is heavy, and with the help of connecting rod transmission, people cannot rotate it. This tooling design has a 5-fold reduction ratio, and a single person can easily achieve opening and closing. This device saves time cost, material cost, and financial pressure, speeds up the debugging progress, improves assembly efficiency, and cooperates with a torque wrench to measure the opening and closing torque, which is convenient for product quality control.

[0029] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A slow opening and closing device for an 800kV disconnector, characterized in that: The invention comprises a fixed bracket (3), and an execution shaft (2) and an operating shaft (9) rotatably arranged on the bracket, wherein a driven gear (6) is fixedly mounted on the execution shaft (2), and a driving gear (10) meshing with the driven gear (6) is fixedly mounted on the operating shaft (9), and the pitch circle diameter of the driven gear (6) is larger than the pitch circle diameter of the driving gear (10); an output end of the execution shaft (2) is provided with a U-shaped groove (11) opening toward the side where the angular isolating switch (1) is located, and the U-shaped groove (11) is adapted to the output shaft of the spring energy storage mechanism of the angular isolating switch; and an input end of the operating shaft is located on a side of the bracket away from the angular isolating switch.

2. The slow opening and closing device for an 800 kV disconnector according to claim 1 is characterized in that: The bracket (3) comprises two vertical plates (5) arranged opposite to each other, the driving gear (10) and the driven gear (6) are both located between the two vertical plates (5), bearings (7) adapted to the execution shaft and the operation shaft are mounted on the vertical plates, the lower ends of the two vertical plates are fixedly connected to the same base (4), and the base is detachably fixedly connected to the housing of the angle-type isolating switch.

3. The slow opening and closing device for an 800 kV disconnector according to claim 2 is characterized in that: The base (4) comprises a support plate fixedly connected to the vertical plate, and a connecting plate fixedly connected to the support plate, the connecting plate being fixedly connected to a connecting flange on a housing of an angle-type disconnector by bolts, a reinforcing rib plate being welded to the bottom surface of the support plate, and the reinforcing rib plate being welded to the connecting plate.

4. The slow opening and closing device for an 800 kV disconnector according to claim 2 is characterized in that: The driven gear is provided with a plurality of positioning holes distributed along the circumferential direction, and the vertical plate is provided with a limiting pin shaft (8) passing through the positioning holes.

5. The slow opening and closing device for an 800 kV disconnector according to claim 1 is characterized in that: The input end of the operating shaft (9) is provided with a hexagonal table adapted to the torque wrench.

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