Circuit breaker for booster station

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker for a booster station, which comprises three groups of circuit breakers uniformly arranged at intervals along the ground. The interior of the connecting part is of a hollow penetrating structure, the connecting part is detachably connected to the bottoms of the three sets of circuit breakers, and three sets of disconnecting switches arranged corresponding to the three sets of circuit breakers respectively are arranged in the connecting part; the isolating switch comprises a base and two insulators installed on the base at intervals, the top end of one insulator is connected with a static contact seat, the static contact seat is provided with a static contact plate, the top end of the other insulator is connected with a movable contact seat, the movable contact seat is provided with a switch blade in a hinged mode, and the switch blade is provided with a movable contact plate. The switch blade is provided with a movable contact sheet which can form electric contact cooperation with the static contact plate. A linkage assembly in transmission fit with the switch blades is arranged in the connecting part, the linkage assembly is used for driving the three switch blades to be synchronously closed with or separated from the corresponding static contact plates, and the beneficial effects of improving the operation synchronism and reliability, optimizing the performance of the linkage assembly and the like are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, specifically for the circuit breaker for booster station. BACKGROUND

[0002] In the power system, the booster station plays a vital role, it can convert low voltage into high voltage to meet the needs of long distance power transmission and large-scale power distribution. As one of the core devices in the booster station, the performance of the circuit breaker is directly related to the safe and stable operation of the entire power system.

[0003] The traditional booster station circuit breaker has some deficiencies in structure and function.

[0004] In the operating mechanism, the operation mode of some circuit breakers is difficult to realize the synchronous and accurate action of multiple switch blades. For example, some early designed circuit breakers, the control of each switch blade is relatively independent, when performing the opening and closing operation, due to the slight difference between the mechanical structure and driving system of different blades, it is easy to cause the time inconsistency of blade action. This not only affects the on-off effect of the circuit, but also may produce unstable arc in the switching process, increases the wear of the contact, reduces the service life of the circuit breaker. Moreover, the transmission efficiency of the traditional operating mechanism is low, and a large operating force is needed to complete the opening and closing action, which not only increases the labor intensity of the operator, but also may affect the reliability of the circuit breaker due to uneven operating force.

[0005] In the installation and debugging, the installation structure of the traditional circuit breaker is relatively complex, and a lot of time and manpower is needed during the installation process. Moreover, due to the difficulty in ensuring the installation accuracy, the circuit breaker may deviate from the position, tilt and other problems during the operation process, which affects its normal work. At the same time, when the circuit breaker needs to be maintained or replaced, the disassembly and installation process is complicated, which increases the power-off time and brings inconvenience to the power supply.

[0006] Therefore, in order to improve the performance and reliability of the booster station circuit breaker and meet the needs of the development of the power system, it is necessary to improve and innovate the existing circuit breaker, and develop a new type of circuit breaker for booster station to solve the above problems of the traditional circuit breaker. INVENTION CONTENTS

[0007] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a circuit breaker for booster station, which solves the technical problems that the operation mode of some circuit breakers is difficult to realize the synchronous and accurate action of multiple switch blades, and due to the difficulty in ensuring the installation accuracy, the circuit breaker may deviate from the position, tilt and other problems during the operation process, which affects its normal work.

[0008] The utility model discloses adopt the scheme for: the circuit breaker for booster station, its characterized in that, include: three groups of circuit breaker that ground even interval arrangement;The connecting portion of hollow through -structure is arranged internally, and the connecting portion is detachably connected to the bottom of three groups of circuit breaker, and three groups of disconnecting switch that are correspondingly arranged with three groups of circuit breaker are equipped in the connecting portion;The disconnecting switch includes base and two insulators that are installed on the base at intervals, and the top of one of the insulators is connected with the static contact seat, and the static contact seat is equipped with the static contact point board, and the top of another insulator is connected with the dynamic contact seat, and the dynamic contact seat is installed with the switch blade through the hinged mode, and the switch blade is equipped with the dynamic contact piece that can form the electric contact cooperation with the static contact point board;The connecting portion is equipped with the linkage assembly that is driven with the switch blade, and the linkage assembly is used for driving three switch blades to close or separate with the corresponding static contact point board simultaneously.

[0009] Preferably, the linkage assembly comprises: a lead screw rotatably connected to the inside of the connecting portion, the connecting portion further comprises three sliding blocks matched with the lead screw, the sliding blocks are in sliding guide cooperation with the inner wall of the connecting portion and are threadedly connected with the lead screw, each sliding block is connected with a long connecting rod through the hinged mode, the other end of the long connecting rod is connected with the corresponding switch blade through the hinged mode, and the lead screw is driven to rotate by the power assembly.

[0010] The control box is fixedly installed on the outer wall of the connecting portion, and the control box is electrically connected with the power assembly through wires to control the operation of the power assembly.

[0011] Preferably, the power assembly comprises an electric motor fixedly arranged on the connecting portion, and the electric motor is electrically connected with the control box to receive the control signal sent by the control box.

[0012] Preferably, the circuit breaker comprises a support rod and two insulating porcelain bottles, the support rod is sequentially connected with the two insulating porcelain bottles at the top, and the top of the two porcelain bottles is provided with a terminal board connected with external lines.

[0013] Preferably, the ground is poured with a reference platform, the reference platform is connected with a transition channel steel, the transition channel steel is inserted with an adjusting bolt at the bottom of the support rod, the adjusting bolt is threadedly connected with an adjusting nut, and the installation height and levelness of the support rod can be adjusted by screwing the adjusting nut.

[0014] Preferably, the surfaces of the static contact point board and the dynamic contact piece are subjected to silver plating treatment, and the thickness of the silver plating layer is 0.1-0.3 mm.

[0015] Preferably, the lead screw is a trapezoidal lead screw, and the pitch of the trapezoidal lead screw is 5-10 mm.

[0016] Preferably, the sliding guide cooperation between the sliding block and the inner wall of the connecting portion adopts a dovetail groove structure, and the cooperation precision of the dovetail groove is H7 / h6.

[0017] Preferably, the control box is provided with a PLC controller, and the PLC is built-in with a control program for the opening and closing operation of the circuit breaker.

[0018] Preferably, the motor is connected with the lead screw through a coupling, and the coupling is an elastic coupling.

[0019] Advantages:

[0020] I. Improve the operation synchronization and reliability: Three groups of circuit breakers are evenly spaced along the ground, and the linkage assembly in the connecting part can drive the three switch blades to be closed or separated synchronously with the corresponding static contact plates. This design fundamentally solves the problem of asynchronous operation of traditional circuit breakers, avoids the generation of inter-phase unbalanced current and overvoltage, reduces the impact on electrical equipment in the power grid, and greatly improves the reliability and stability of the power system operation.

[0021] II. Optimize the performance of the linkage assembly: The linkage assembly adopts a combination structure of lead screw, sliding block and long connecting rod. The lead screw is a trapezoidal lead screw with a pitch of 5-10 mm. The sliding block with a dovetail groove structure and a precision of H7 / h6 is slidingly guided and matched with the inner wall of the connecting part, making the transmission more accurate and stable. This not only ensures the synchronization of switch blade action, but also improves the operation response speed, so that the circuit breaker can perform opening and closing operations more quickly, respond to faults in the power system in a timely manner, and enhance the fault handling capability of the power system.

[0022] III. Enhance the conductivity and wear resistance: The surfaces of the static contact plates and the moving contact pieces are plated with silver, with a silver plating layer thickness of 0.1-0.3 mm. This effectively reduces the contact resistance, reduces the heat loss, improves the conductivity and wear resistance, prolongs the service life of the contacts, and reduces the failure rate of the equipment caused by contact problems.

[0023] IV. Realize intelligent control: The control box is provided with a PLC controller, which is built-in with a control program for the opening and closing operation of the circuit breaker, and can accurately control the operation of the power assembly. The motor as the power assembly is connected with the lead screw through an elastic coupling, which not only can accurately receive the control signal sent by the control box to realize automatic and intelligent control, but also can compensate for installation errors and angular displacement, reduce vibration and noise transmission, and improve the stability and reliability of the overall operation of the equipment.

[0024] V. Easy to install and debug: The circuit breaker is supported by support rods and insulating porcelain bottles. The support rod bottom and the ground reference table are connected by a transition channel steel, an adjusting bolt and an adjusting nut structure. This design can easily adjust the installation height and levelness of the support rod, reduce the installation difficulty, improve the installation precision, facilitate the installation, debugging and later maintenance of the equipment, and reduce the risk of equipment failure caused by installation problems.

[0025] Six, improve the stability and adaptability of equipment: the overall structure design is reasonable, the cooperation of each component makes the circuit breaker better adapt to the complex environment of the booster station, reduces the influence of environmental factors on the performance of the equipment, guarantees the long-term stable operation of the equipment, and provides strong support for the reliable power supply of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the overall schematic diagram of the utility model.

[0027] Figure 2 is the single circuit breaker schematic diagram of the utility model.

[0028] Figure 3 is the circuit breaker top terminal block schematic diagram of the utility model.

[0029] Figure 4 is the connection part solid section view of the utility model.

[0030] Figure 5 is the A partial enlarged view of Figure 4 .

[0031] Figure 6 is the isolating switch solid schematic diagram of the utility model.

[0032] Figure 7 is the isolating switch structure schematic diagram of the utility model.

[0033] Figure 8 is the B partial enlarged view of Figure 7 .

[0034] Reference signs:

[0035] 1, circuit breaker;11, support rod;12, insulating porcelain bottle;13, terminal board;

[0036] 2, connection part;

[0037] 3, isolating switch;31, base;32, insulator;33, static contact seat;34, static contact point plate;35, dynamic contact seat;36, switch blade;37, dynamic contact piece;

[0038] 4, linkage assembly;41, lead screw;42, sliding block;43, long connecting rod;

[0039] 5, control box;

[0040] 6, reference platform;61, transition channel steel;62, adjusting bolt;63, adjusting nut. DETAILED DESCRIPTION

[0041] The foregoing and other technical contents, features and effects of the utility model are described below in conjunction with the accompanying drawings. Figures 1-8The detailed description of the embodiments will be clear. The structural contents mentioned in the following examples are all referred to the drawings.

[0042] The various exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0043] In the embodiment 1, the circuit breaker for the booster station has the following structure:

[0044] Three groups of circuit breakers 1 are evenly and spacedly arranged along the ground. In actual installation, the spacing distance between the circuit breakers is accurately determined according to the site planning and electrical performance requirements of the booster station, so as to minimize the electrical interference between the circuit breakers and facilitate the subsequent maintenance and repair work.

[0045] The horizontal rod 2 with a hollow through structure is detachably connected to the bottom of the three groups of circuit breakers 1. Three groups of disconnectors 3 are arranged in the horizontal rod 2 corresponding to the three groups of circuit breakers 1. In the installation of the horizontal rod 2, it is ensured that the connection between the horizontal rod 2 and the circuit breakers 1 is firm and reliable, and the installation position of the internal disconnectors 3 is accurate, so as to ensure the stability and reliability of the subsequent operation.

[0046] The disconnector 3 includes a base 31 and two insulators 32 spacedly installed on the base 31. The top end of one insulator 32 is connected with a static contact seat 33, and the static contact seat 33 is installed with a static contact plate 34. The top end of the other insulator 32 is connected with a dynamic contact seat 35, and the dynamic contact seat 35 is installed with a switch blade 36 in a hinged manner, and the switch blade 36 is installed with a dynamic contact piece 37 capable of forming electrical contact with the static contact plate 34. In the installation of the disconnector 3, the installation accuracy of each component is required, especially the relative position of the static contact plate 34 and the dynamic contact piece 37, so as to ensure good electrical contact when the switch blade 36 is actuated.

[0047] The crossbar 2 is provided with a linkage assembly 4 in transmission cooperation with the switch blade 36. The linkage assembly 4 specifically comprises a screw rod 41 rotatably connected to the inside of the crossbar 2, three sliding blocks 42 adapted to the screw rod 41 installed in the crossbar 2, the sliding blocks 42 being in sliding guide cooperation with the inner wall of the crossbar 2 through dovetail groove structure and being in threaded connection with the screw rod 41. Each sliding block 42 is connected with a long connecting rod 43 through hinged connection, and the other end of the long connecting rod 43 is connected with the corresponding switch blade 36 through hinged connection. The screw rod 41 is driven to rotate by a power assembly, which comprises a [specific type] motor installed on the crossbar 2, and the motor is in electrical connection with a control box 5 fixedly installed on the outer wall of the crossbar 2 through wires. The control box 5 is provided with a PLC controller, and the PLC is built-in with a control program for the opening and closing operation of the circuit breaker 1. When installing the linkage assembly 4, the rotation flexibility of the screw rod 41 and the cooperation precision of the sliding blocks 42 and the dovetail groove of the inner wall of the crossbar 2 are ensured, the connection of the long connecting rod 43 and the switch blade 36 is stable, and the linkage assembly 4 can accurately drive the switch blade 36 to act.

[0048] The circuit breaker 1 further comprises a support rod 11 and two insulating porcelain bottles 12. The two insulating porcelain bottles 12 are connected in sequence at the top of the support rod 11, and a terminal block 13 connected with external lines is installed at the top of each insulating porcelain bottle 12. During installation, it is ensured that the connection of the support rod 11 and the insulating porcelain bottles 12 is firm, the insulating performance of the insulating porcelain bottles 12 is good, and the installation position of the terminal block 13 is convenient for external line connection.

[0049] The surfaces of the stationary contact plate 34 and the movable contact piece 37 are both subjected to silver plating treatment, and the thickness of the silver plating layer is controlled within the range of 0.1-0.3 mm. During production and manufacturing, the silver plating process requirements are strictly followed to ensure the uniformity and thickness of the silver plating layer to meet the standards, so as to achieve the effects of reducing contact resistance, improving conductivity and wear resistance.

[0050] The screw rod 41 is a trapezoidal screw rod, and the pitch thereof is 5-10 mm. When selecting and installing the screw rod 41, the appropriate pitch is determined according to the actual transmission requirements and precision requirements, so as to ensure that the sliding block 42 can obtain stable and accurate linear motion when the screw rod 41 rotates.

[0051] The sliding guide cooperation between the sliding block 42 and the inner wall of the crossbar 2 adopts dovetail groove structure, and the cooperation precision of the dovetail groove is H7 / h6. During processing and installation, the dimensional accuracy and surface roughness of the dovetail groove are strictly controlled to ensure that the sliding block 42 slides smoothly in the crossbar 2 without jamming phenomenon, and the transmission precision of the linkage assembly 4 is improved.

[0052] The PLC controller in the control box 5 accurately controls the starting, stopping and rotating speed of the motor according to the preset control program. The motor is connected with the lead screw 41 through the elastic coupling. The elastic coupling not only can transmit power, but also can compensate the installation error and angular displacement between the motor shaft and the lead screw 41 shaft, reduce the transmission of vibration and noise, and improve the stability of the overall operation of the equipment.

[0053] Operation flow

[0054] ① Closing operation

[0055] Starting control program: the operator starts the preset closing control program in the PLC controller through the operation interface of the control box 5. The control program will send a starting signal to the motor according to the preset parameters and logic.

[0056] Motor drives the lead screw to rotate: after receiving the control signal sent by the control box 5, the motor starts to operate and drives the connected lead screw 41 to rotate. Since the sliding block 42 is threadedly connected with the lead screw 41, and the sliding block 42 is in sliding guide cooperation with the inner wall of the connecting part 2, the rotation of the lead screw 41 will make the sliding block 42 move linearly along the inner wall of the connecting part 2.

[0057] Switching knife switch closing: the linear motion of the sliding block 42 is transmitted to the switching knife switch 36 through the long connecting rod 43, which drives the three switching knife switches 36 to move synchronously towards the corresponding static contact plate 34, and finally makes the dynamic contact piece 37 form electrical contact with the static contact plate 34, completes the closing operation, and realizes the conduction of the circuit.

[0058] ② Opening operation

[0059] Starting control program: the operator starts the preset opening control program in the PLC controller through the operation interface of the control box 5. The control program will send a reverse operation signal to the motor.

[0060] Motor reversely drives the lead screw to rotate: after receiving the reverse operation control signal, the motor reversely rotates the lead screw 41, so that the sliding block 42 moves linearly in the opposite direction along the inner wall of the connecting part 2.

[0061] Switching knife switch separation: the reverse linear motion of the sliding block 42 is transmitted to the switching knife switch 36 through the long connecting rod 43, which drives the three switching knife switches 36 to move synchronously away from the corresponding static contact plate 34, and makes the dynamic contact piece 37 and the static contact plate 34 break the electrical contact, completes the opening operation, and realizes the cut-off of the circuit.

[0062] Example 2, based on example 1, further describes the reference table and the adjusting structure.

[0063] The ground is poured with a reference platform 6, the reference platform 6 is connected with a transition channel steel 61, the transition channel steel 61 is inserted with an adjusting bolt 62 at the bottom of the support rod 11, and the adjusting bolt 62 is threadedly connected with an adjusting nut 63.In pouring the reference platform 6, the strength of the concrete is ensured to meet the design requirements, and the reference platform 6 can stably bear the weight of the circuit breaker and its auxiliary equipment.In installing the transition channel steel 61, the connection between the transition channel steel 61 and the reference platform 6 is ensured to be firm, and the installation positions of the adjusting bolt 62 and the adjusting nut 63 are convenient for subsequent operations.

[0064] The installation height and the levelness of the support rod 11 can be adjusted by screwing the adjusting nut 63.In the installation process or after running for a period of time, if the installation height or the levelness of the circuit breaker 1 is found to be not up to the requirements, the operator can screw the adjusting nut 63 clockwise or counterclockwise, so that the adjusting bolt 62 is relatively displaced between the transition channel steel 61 and the bottom of the support rod 11, thereby changing the installation height and the levelness of the support rod 11, and ensuring that the circuit breaker 1 is in the best working state.

[0065] The above description is only for illustrating the present application, and it should be understood that the present application is not limited to the above embodiments, and various modifications in accordance with the present application are within the protection scope of the present application.

Claims

1. Circuit breaker for a step-up station, characterized in that, The utility model relates to a kind of ground circuit breaker, including: Three groups of circuit breakers (1) are evenly spaced along the ground; A hollow through structure is connected to the bottom of the three groups of circuit breakers (1), and the connection part (2) is detachably connected to the three groups of circuit breakers (1). The connection part (2) is provided with three groups of disconnectors (3) arranged correspondingly with the three groups of circuit breakers (1); The disconnector (3) includes a base (31) and two insulators (32) installed at intervals on the base (31). The top of one of the insulators (32) is connected to a static contact seat (33), and the static contact seat (33) is provided with a static contact plate (34). The top of the other insulator (32) is connected to a moving contact seat (35), and the moving contact seat (35) is provided with a switch blade (36) installed in a hinged manner. The switch blade (36) is provided with a moving contact piece (37) capable of forming an electrical contact with the static contact plate (34). The connection part (2) is provided with a linkage assembly (4) in transmission cooperation with the switch blade (36). The linkage assembly (4) is used to drive the three switch blades (36) to be closed or separated from the corresponding static contact plate (34) synchronously.

2. The circuit breaker for a step-up station according to claim 1, characterized in that, The linkage assembly (4) includes: A lead screw (41) is rotatably connected to the inside of the connection part (2). The connection part (2) is also provided with three sliders (42) adapted to the lead screw (41). The sliders (42) are in sliding guide cooperation with the inner wall of the connection part (2) and are threadedly connected to the lead screw (41). Each slider (42) is connected to a long connecting rod (43) in a hinged manner. The other end of the long connecting rod (43) is connected to the corresponding switch blade (36) in a hinged manner. The lead screw (41) is driven to rotate by a power assembly. A control box (5) is fixedly installed on the outer wall of the connection part (2). The control box (5) is electrically connected to the power assembly by wires to control the operation of the power assembly.

3. The circuit breaker for a step-up station according to claim 2, characterized in that, The power assembly includes an electric motor fixedly installed on the connection part (2). The electric motor is electrically connected to the control box (5) to receive control signals from the control box (5).

4. The circuit breaker for a step-up station according to claim 1, characterized in that, The circuit breaker (1) includes a support rod (11) and two insulating porcelain bottles (12). The support rod (11) is connected to the two insulating porcelain bottles (12) in sequence at the top. The top of each insulating porcelain bottle (12) is provided with a terminal block (13) connected to an external line.

5. The circuit breaker for a step-up station according to claim 4, characterized in that, The ground is poured with a reference platform (6). The reference platform (6) is connected to a transition channel steel (61). The transition channel steel (61) is inserted with an adjusting bolt (62) at the bottom of the support rod (11). The adjusting bolt (62) is threadedly connected to an adjusting nut (63). The installation height and levelness of the support rod (11) can be adjusted by screwing the adjusting nut (63).

6. The circuit breaker for a step-up station according to claim 1, characterized in that, The surfaces of the static contact plate (34) and the moving contact piece (37) are silver-plated.

7. The circuit breaker for a step-up station according to claim 2, characterized in that, The lead screw (41) is a trapezoidal lead screw.

8. The circuit breaker for a step-up station according to claim 2, characterized in that, The sliding guide cooperation between the slider (42) and the inner wall of the connection part (2) adopts a dovetail groove structure. The cooperation precision of the dovetail groove is H7 / h6.

9. The circuit breaker for a step-up station according to claim 3, characterized in that, The control box (5) is provided with a PLC controller. The PLC is provided with a control program for the opening and closing operation of the circuit breaker (1).

10. The circuit breaker for a step-up station according to claim 3, characterized in that, The motor is connected with the screw rod (41) through a coupling, and the coupling is an elastic coupling.

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