An automatic break-in device and break-in method for the operating mechanism of an isolating grounding switch.

Abstract

This invention belongs to the field of grinding devices, and specifically relates to an automatic break-in device and method for an isolating grounding switch operating mechanism. To achieve automatic break-in of the operating mechanism, this invention proposes an automatic break-in device for an isolating grounding switch operating mechanism, including a frame. The frame is equipped with a control module, a motor module, an expansion shaft for positioning the operating mechanism, a switch module that is drively connected to the output shaft of the operating mechanism and used to simulate opening and closing, and a lifting module for driving the motor module to approach and drive the operating mechanism. The control module controls the motor module to drive the input shafts to alternately move for a break-in test. This invention also proposes a break-in method using the above-mentioned automatic break-in device. The expansion shaft positions the operating mechanism, enabling a drive connection between the output shaft and the switch module. The lifting module drives the motor module to connect to the input shafts, ultimately causing the motor module to drive the operating mechanism and the switch module, thus achieving automatic break-in.

Description

Technical Field

[0001] This invention belongs to the field of grinding devices, and in particular relates to an automatic running-in device and running-in method for an operating mechanism of an isolating grounding switch. Background Technology

[0002] In ring main units, three-position isolating grounding switches are used to achieve electrical isolation during equipment maintenance or repair, ensuring the safety of maintenance personnel and preventing accidental electric shock. Three-position isolating grounding switches are typically controlled by an operating mechanism. To achieve the "five protections" of the ring main unit, an existing operating mechanism has a mechanical interlock function to prevent misoperation. It can only close the isolating switch when the grounding switch is open, and close the grounding switch after the isolating switch is open. This mechanical structure prevents misoperation; for example, when the grounding switch is closed, the isolating switch is limited, so even if the operator tries to close the isolating switch forcefully, they will find that the isolating switch does not move, thus indicating to the operator that closing the isolating switch at this time is a misoperation.

[0003] like Figure 1 and Figure 2 As shown, the operating mechanism 1 has a grounding input shaft 1-1, a closing input shaft 1-2, and an output shaft 1-5. The grounding input shaft 1-1 can drive the output shaft 1-5 to rotate to either the grounding position or the isolation position, and the closing input shaft 1-2 can drive the output shaft 1-5 to rotate to either the isolation position or the closing position. The operating mechanism 1 also has a mounting plate 1-3, which has mounting holes 1-4 for bolts to pass through to mount the operating mechanism 1 in the ring main unit. There are four mounting holes 1-4, distributed at the four corners of the mounting plate 1-3.

[0004] Before leaving the factory, the operating mechanism 1 needs to undergo 30 mechanical break-in tests. The purpose of these tests is to simulate real-world operating conditions, thereby determining whether the operating mechanism 1 is qualified and ensuring that all operating mechanisms 1 entering the market are qualified products, thus guaranteeing that they can function properly in the future. Simultaneously, during the mechanical break-in tests, the corresponding components of the qualified operating mechanism 1 rub against each other to achieve optimal fit between all components.

[0005] In addition, when it is necessary to test the service life of the operating mechanism 1, it is necessary to conduct 5,000 mechanical break-in tests on the operating mechanism 1.

[0006] Currently, in this field, a mechanical break-in test is generally conducted after the operating mechanism 1 is installed in a dedicated test ring main unit to enable the operating mechanism 1 to open and close the isolating grounding switch in the ring main unit. The reason for using a dedicated test ring main unit is to control variables and avoid break-in failure due to factors other than the operating mechanism 1. Operators need to manually perform the mechanical break-in test using the operating handle in the following cycle: close the isolating switch → open the isolating switch → close the grounding switch → open the grounding switch. Alternatively, the cycle can start with the grounding switch being closed. Each time the isolating grounding switch is opened or closed, the required operating torque is generally 60~100 N·m, resulting in high labor intensity, low production efficiency, and a risk of injury from the operating handle falling during long-term operation.

[0007] In the relevant technologies of operating mechanism break-in equipment, there are some automatic break-in devices in the prior art, such as: (1) Chinese invention patent application with application publication number CN115188616A and application publication date of 2022.10.14 discloses a tooling for automatic replacement of manual operation mechanism break-in using visual positioning; (2) Chinese utility model patent with authorization announcement number CN218964942U and authorization announcement date of 2023.05.05 discloses an automatic break-in device for ring main unit operating mechanism; (3) Chinese utility model patent with authorization announcement number CN222563363U and authorization announcement date of 2025.03.04 discloses an automatic break-in device for ring main unit operating mechanism; (4) Chinese utility model patent with authorization announcement number CN223676936U and authorization announcement date of 2025.12.16 discloses a manual-automatic break-in device for ring main unit switch operating mechanism.

[0008] Of the four patent documents mentioned above, some do not describe the specific structure of the automatic break-in device, while the automatic break-in devices in the remaining patent documents all have only one output shaft, making them unsuitable for various applications. Figure 1 and Figure 2 The operating mechanism 1 shown, i.e. the aforementioned automatic break-in device, is used to break in the ring main unit, not the operating mechanism of the isolating grounding switch.

[0009] Therefore, there is an urgent need for a method that can... Figure 1 and Figure 2 The operating mechanism 1 shown is an automatic break-in device for automatic break-in. Summary of the Invention

[0010] The purpose of this invention is to provide an automatic break-in device for an operating mechanism of an isolating grounding switch, so as to solve the technical problem that the existing technology cannot break in an operating mechanism with two input shafts.

[0011] The present invention also aims to provide a break-in method to solve the technical problem that existing technologies cannot break in operating mechanisms with two input shafts.

[0012] To achieve the above objectives, the technical solution of the automatic break-in equipment for the operating mechanism of the isolating grounding switch provided by the present invention is as follows: An automatic break-in device for an isolating grounding switch operating mechanism includes a frame, on which a control module, a motor module, a lifting module, a positioning module, and a switch module for simulating the opening and closing of the isolating grounding switch are mounted; The motor module includes a grounding motor and a closing motor located above the positioning module. The output terminals of the grounding motor and the closing motor are respectively provided with grounding sockets and closing sockets. The switch module includes a rotating shaft for anti-rotation engagement with the output shaft of the operating mechanism; The positioning module includes at least two expansion shafts for insertion into the mounting holes of the operating mechanism, so as to position the operating mechanism in a state where the output shaft and the rotating shaft are locked in place. The positioning module and the switch module are defined as the passive part. The lifting module has a running-in mode for driving the motor module and the passive part to move towards each other until each motor is connected to the corresponding input shaft through the socket, and a separation mode for driving the motor module and the passive part to move away from each other until each motor is disconnected from the corresponding input shaft. The control module communicates with each motor and is used to control each motor to drive each input shaft to alternately move in order to conduct a break-in test.

[0013] Furthermore, the lifting module is used to drive the passive part to lift. The lifting module includes a lifting frame that can be lifted. The upper end of the lifting frame has a support platform for supporting the operating mechanism, and the expansion shaft is set on the support platform. All contacts of the switch module are located below the support platform, and all stationary contacts of the switch module are fixedly installed on the lifting frame. The rotating shaft is mounted on the lifting frame and passes through the support platform.

[0014] Furthermore, the lifting module is used to drive the motor module to lift. The lifting module includes a lifting platform, the motor module is fixedly installed on the lifting platform, and all the sockets are located below the lifting platform. The frame includes a fixed frame for supporting the operating mechanism. The upper end of the fixed frame has a fixed platform for supporting the operating mechanism. The expansion shaft is set on the fixed platform. Each contact of the switch module is located below the fixed platform, and each stationary contact of the switch module is fixedly installed on the fixed frame. The rotating shaft is rotatably assembled on the fixed frame and passes through the support platform.

[0015] Furthermore, one of the moving contact and the stationary contact of the switch module has two second contact pieces arranged vertically, and the other has a first contact piece. Each second contact piece can be detachably threaded with a contact element. The end face of one end of the contact element is located between the two second contact pieces and forms a contact surface. When the moving contact is in the grounding position or the closing position, the first contact piece is located between the two second contact pieces, and both the upper and lower end faces of the first contact piece are in contact with the contact surface.

[0016] Furthermore, the contact elements connected to the two second contact pieces of the same contact are arranged vertically facing each other.

[0017] Furthermore, each second contact piece is provided with at least two contact elements.

[0018] Furthermore, a deformation groove is provided in the middle of the second contact piece, and all contact elements connected to the same second contact piece are evenly distributed on both sides of the deformation groove.

[0019] Furthermore, stationary contacts are divided into grounding stationary contacts and closing stationary contacts. A contact group is defined as consisting of a moving contact, a grounding stationary contact, and a closing stationary contact, and the number of contact groups is at least two.

[0020] Furthermore, the moving contact is fitted onto the rotating shaft, and the moving contact is provided with a threaded hole, at which a set screw is connected for pressing against the rotating shaft to fix the rotating shaft and the moving contact.

[0021] Furthermore, each motor is equipped with an adapter rod for connecting the motor to the corresponding input shaft. The upper end of the adapter rod has a plug for inserting into the corresponding socket, and the lower end has an adapter socket for inserting the corresponding input shaft. When the lifting module is in the break-in mode, the plug is inserted into the corresponding socket to achieve the transmission connection between each motor and the corresponding input shaft. When the lifting module is in the separation mode, the plug is separated from the corresponding socket to disconnect each motor from the corresponding input shaft.

[0022] Furthermore, the rotating shaft includes a shaft body and an adapter connected to the upper end of the shaft body. The lower end of the adapter is provided with an adapter slot, the upper end of the shaft body is inserted into the adapter slot, and the upper end of the adapter is provided with a connector for engaging with the output shaft to prevent rotation.

[0023] Furthermore, the rotating shaft includes a polygonal prism-shaped shaft body and a cylindrical connecting shaft connected to the lower end of the shaft body. Bearings are mounted on the frame, the bearings are connected to the connecting shaft, and the outer circumferential surface of the connecting shaft is provided with a spiral oil groove.

[0024] The beneficial effects of the automatic break-in equipment for the operating mechanism of the isolating grounding switch provided by the present invention are as follows: In the present invention, the operating mechanism can be easily positioned or released by the expansion shaft, which is beneficial to improving the efficiency during continuous testing; the switch module simulates the isolating grounding switch and provides the opening and closing load, without needing to consider electrical performance, only mechanical performance, which can effectively reduce costs.

[0025] In this invention, firstly, the positioning module is used to position the operating mechanism, so that the output shaft of the operating mechanism is connected to the switch module for transmission. Then, the entire assembly consisting of the operating mechanism, the positioning module, and the switch module moves towards the motor module, so that the input shaft of the operating mechanism is connected to the motor for transmission. Finally, the control module is used to control the grounding motor and the closing motor to alternately operate to simulate the action sequence of each input shaft during manual break-in, thereby achieving automatic break-in, reducing the labor intensity of workers, and avoiding the risk of the operating handle falling and injuring people during manual break-in.

[0026] Furthermore, when the switch module includes contact components, the friction between the moving and stationary contacts can be easily adjusted by rotating the contact components, thereby facilitating the adjustment of the opening and closing load. Simultaneously, when the contact components wear out, only the contact components need to be replaced, further reducing costs.

[0027] Furthermore, the wear rate of the contact components and the first contact piece can be reduced and the service life of the switching module can be improved by increasing the treatment of the contact components, rationally arranging the position of the contact components, and increasing the number of moving and stationary contacts.

[0028] Furthermore, an expansion joint can be provided on the second contact piece. Since the normal pressure between the contact element and the first contact piece is essentially provided by the deformation of the second contact piece, the greater the stiffness of the second contact piece, the greater the change in normal pressure between the contact element and the first contact piece per unit number of turns, thus resulting in lower sensitivity when adjusting the opening and closing load. By providing an expansion joint, the stiffness of the deformed part of the second contact piece can be effectively reduced, thereby minimizing the change in normal pressure between the contact element and the first contact piece after turning the contact element per unit number of turns, and thus improving the sensitivity when adjusting the opening and closing load.

[0029] To achieve the above objectives, the technical solution of the break-in method provided by this invention is as follows: A break-in method involves using an automatic break-in device to run in the operating mechanism of an isolating grounding switch. The break-in process includes the following steps: Step 1: Expand the expansion shaft after passing through the mounting hole to position the operating mechanism, and at the same time, make the output shaft of the operating mechanism anti-rotate with the rotating shaft of the switch module; Step 2: Use the lifting module to move the motor module and the operating mechanism toward each other until each motor is connected to the corresponding input shaft through the socket. Step 3: Control each motor to drive each input shaft to move alternately to conduct a break-in test.

[0030] The automatic break-in equipment for the operating mechanism of the isolating grounding switch includes a frame, on which a control module, a motor module, a lifting module, a positioning module, and a switch module for simulating the opening and closing of the isolating grounding switch are installed. The motor module includes a grounding motor and a closing motor located above the positioning module. The output terminals of the grounding motor and the closing motor are respectively provided with grounding sockets and closing sockets. The switch module includes a rotating shaft for anti-rotation engagement with the output shaft of the operating mechanism; The positioning module includes at least two expansion shafts for insertion into the mounting holes of the operating mechanism, so as to position the operating mechanism in a state where the output shaft and the rotating shaft are locked in place. The positioning module and the switch module are defined as the passive part. The lifting module has a running-in mode for driving the motor module and the passive part to move towards each other until each motor is connected to the corresponding input shaft through the socket, and a separation mode for driving the motor module and the passive part to move away from each other until each motor is disconnected from the corresponding input shaft. The control module communicates with each motor and is used to control each motor to drive each input shaft to alternately move in order to conduct a break-in test.

[0031] Furthermore, the lifting module is used to drive the passive part to lift. The lifting module includes a lifting frame that can be lifted. The upper end of the lifting frame has a support platform for supporting the operating mechanism, and the expansion shaft is set on the support platform. All contacts of the switch module are located below the support platform, and all stationary contacts of the switch module are fixedly installed on the lifting frame. The rotating shaft is mounted on the lifting frame and passes through the support platform.

[0032] Furthermore, the lifting module is used to drive the motor module to lift. The lifting module includes a lifting platform, the motor module is fixedly installed on the lifting platform, and all the sockets are located below the lifting platform. The frame includes a fixed frame for supporting the operating mechanism. The upper end of the fixed frame has a fixed platform for supporting the operating mechanism. The expansion shaft is set on the fixed platform. Each contact of the switch module is located below the fixed platform, and each stationary contact of the switch module is fixedly installed on the fixed frame. The rotating shaft is rotatably assembled on the fixed frame and passes through the support platform.

[0033] Furthermore, in step 3, the threaded parts are tightened to adjust the total friction between the moving contact and the stationary contact, so that the output torque T of each motor satisfies: 60 N·m ≤ T ≤ 100 N·m.

[0034] At this time, the operating mechanism of the isolating grounding switch uses an automatic break-in device. One of the moving contact and the stationary contact of the switch module has two second contact pieces arranged vertically, and the other has a first contact piece. Each second contact piece can be detachably threaded with a contact element. The end face of one end of the contact element is located between the two second contact pieces and forms a contact surface. When the moving contact is in the grounding position or the closing position, the first contact piece is located between the two second contact pieces, and the upper and lower end faces of the first contact piece are in contact with the contact surface.

[0035] Furthermore, the contact elements connected to the two second contact pieces of the same contact are arranged vertically facing each other.

[0036] Furthermore, each second contact piece is provided with at least two contact elements.

[0037] Furthermore, a deformation groove is provided in the middle of the second contact piece, and all contact elements connected to the same second contact piece are evenly distributed on both sides of the deformation groove.

[0038] Furthermore, stationary contacts are divided into grounding stationary contacts and closing stationary contacts. A contact group is defined as consisting of a moving contact, a grounding stationary contact, and a closing stationary contact, and the number of contact groups is at least two.

[0039] Furthermore, the moving contact is fitted onto the rotating shaft, and the moving contact is provided with a threaded hole, at which a set screw is connected for pressing against the rotating shaft to fix the rotating shaft and the moving contact.

[0040] The beneficial effects of the break-in method provided by this invention are as follows: In this invention, the expansion shaft allows for convenient positioning or release of the operating mechanism, which is beneficial for improving efficiency during continuous testing; the switch module simulates an isolating grounding switch, providing the opening and closing load, eliminating the need to consider electrical performance and focusing only on mechanical performance, thus effectively reducing costs. The method in this invention enables automatic break-in, reducing the labor intensity of workers and avoiding the risk of injury from a falling operating handle during manual break-in.

[0041] Furthermore, the opening and closing loads can be easily adjusted by rotating the contact components. Additionally, once the contact components wear out, only the contact components need to be replaced, further reducing costs.

[0042] Furthermore, the wear rate of the contact components and the first contact piece can be reduced and the service life of the switching module can be improved by increasing the treatment of the contact components, rationally arranging the position of the contact components, and increasing the number of moving and stationary contacts.

[0043] Furthermore, an expansion joint can be provided on the second contact piece. Since the normal pressure between the contact element and the first contact piece is essentially provided by the deformation of the second contact piece, the greater the stiffness of the second contact piece, the greater the change in normal pressure between the contact element and the first contact piece per unit number of turns, thus resulting in lower sensitivity when adjusting the opening and closing load. By providing an expansion joint, the stiffness of the deformed part of the second contact piece can be effectively reduced, thereby minimizing the change in normal pressure between the contact element and the first contact piece after turning the contact element per unit number of turns, and thus improving the sensitivity when adjusting the opening and closing load. Attached Figure Description

[0044] Figure 1 A structural schematic diagram of the operating mechanism of an existing isolating grounding switch from one perspective; Figure 2 A schematic diagram of the operating mechanism of an existing isolating grounding switch from another perspective; Figure 3 A schematic diagram of the external appearance of an automatic break-in device for the operating mechanism of an isolating grounding switch; Figure 4 A front view of the lifting module of the automatic break-in equipment for the operating mechanism of the isolation grounding switch in the disengagement mode (the obstruction structure in front is omitted). Figure 5 A frontal view of the moving contact of the switch module of the automatic break-in equipment for the operating mechanism of the isolation grounding switch when it is in the isolation position (the obstruction structure in front is omitted). Figure 6 A frontal view of the moving contact of the switch module of the automatic break-in equipment for the isolation grounding switch operating mechanism when it is in the grounding position (the obstruction structure in front is omitted). Figure 7 A front view of the moving contact of the switch module of the automatic break-in equipment for the operating mechanism of the isolation grounding switch when it is in the closed position (the obstruction structure in front is omitted). Figure 8 for Figure 4 Structural diagram omitting the cabinet and control module; Figure 9 for Figure 8 Structural diagram omitting the operating mechanism; Figure 10 This is a structural diagram viewed from below and behind when the operating mechanism is connected to the motor module for transmission. Figure 11 A structural schematic diagram of the operating mechanism after it has been positioned by the positioning module; Figure 12 A structural schematic diagram from another perspective of the operating mechanism after it has been positioned by the positioning module; Figure 13 This is a structural schematic diagram of the expansion shaft device; Figure 14 A structural schematic diagram of the guide module, support platform, and top plate; Figure 15 A schematic diagram of the structure at the mounting point of the moving contact and the rotating shaft; Figure 16 Exploded view of a single moving contact; Figure 17 A structural schematic diagram of the adapter corresponding to the operating mechanism of the environmental protection cabinet from one perspective; Figure 18 Another structural diagram of the adapter corresponding to the operating mechanism of the environmental protection cabinet; Figure 19 A schematic diagram of the structure of the adapter corresponding to the operating mechanism of the sulfur hexafluoride cabinet from one perspective; Figure 20 Another structural schematic diagram of the adapter corresponding to the operating mechanism of the sulfur hexafluoride cabinet; Figure 21 The structural diagram is shown after omitting a single GB 6262 aluminum profile and a single GB 4040E aluminum profile at the lifting module. Figure 22 This is a schematic diagram of the structure of a GB 6262 aluminum profile after processing. Figure 23 This is a structural diagram of the national standard 4040E aluminum profile.

[0045] Explanation of reference numerals in the attached figures: 1. Operating Mechanism; 1-1. Grounding Input Shaft; 1-2. Closing Input Shaft; 1-3. Mounting Plate; 1-4. Mounting Hole; 1-5. Output Shaft; 2. Cabinet; 2-1. Cabinet Door; 2-2. Central Column; 2-3. Side Plate; 2-4. Frame; 2-4-1. Top Plate; 3. Motor Module; 3-1. Grounding Socket; 3-2. Closing Socket; 4. Control Module; 5. Adapter Rod; 6. Positioning Module; 6-1. Expansion Shaft; 6-1-1. Expansion Head; 6-1-2. Expansion Shaft Body; 7. Switch Module; 7-1. Rotating Shaft; 7-1-1. Adapter; 7-1-2. Shaft Body; 7-1-3. Spiral Oil Groove; 7-1-4. Hexagonal Groove; 7-1-5. Radial Hole; 7-1-6 7-2. Square slot; 7-2. Moving contact; 7-2-1. Second contact piece; 7-2-2. First threaded hole; 7-2-3. Second threaded hole; 7-2-4. Contact element; 7-2-5. Expansion joint; 7-3. Grounding stationary contact; 7-4. Closing stationary contact; 7-5. Top screw; 8. Lifting module; 8-1. Lifting frame; 8-1-1. Support platform; 8-1-2. National standard 6262 aluminum profile; 8-1-3. Drive shaft through hole; 8-1-4. Mounting platform; 8-2. Bearing mounting hole; 8-3. Lifting motor; 8-4. Drive shaft; 8-5. Screw lifting mechanism; 8-6. National standard 4040E aluminum profile; 9. Guide module; 9-1. Guide rod; 9-2. Guide sleeve. Detailed Implementation

[0046] To address the problems in the background art, the core inventive concept of this invention is as follows: First, the operating mechanism is positioned using the mounting holes of the operating mechanism, and the output shaft of the operating mechanism is kept in a transmission connection with the switch module. Then, the operating mechanism and the motor module are brought closer to each other until the motor module and the operating mechanism are in a transmission connection. Finally, the motor module drives the input shafts of the operating mechanism to move alternately to simulate manual operation, thereby automatically performing the break-in test.

[0047] Based on the above concept, this invention also proposes a novel switch module, in which the moving or stationary contact has a threaded contact element. The opening and closing load can be adjusted by turning the contact element. At the same time, the contact element contacts the corresponding contact. If the contact element is damaged, only the contact element needs to be replaced, which is cost-effective.

[0048] Preferably, the moving contact has a contact element. The moving contact needs to rub against the grounding stationary contact and the closing stationary contact. The number of rubbing times is twice that of each stationary contact, making it more prone to damage. Placing the contact element on the moving contact can save costs to the greatest extent.

[0049] The present invention will be further described in detail below with reference to the embodiments.

[0050] An embodiment of the automatic break-in device for the operating mechanism of the isolating grounding switch provided by the present invention: like Figures 1-23 As shown, the automatic break-in equipment for the operating mechanism of the isolating grounding switch (hereinafter referred to as the automatic break-in equipment) includes a cabinet 2. The cabinet 2 includes a frame 2-4 and side plates 2-3, a central column 2-2 and a cabinet door 2-1 installed on the frame 2-4. The frame 2-4 includes a crossbeam, a column and a top plate 2-4-1. The frame 2-4 is also equipped with a control module 4, a motor module 3, a lifting module 8, a positioning module 6 and a switch module 7 for simulating opening and closing of the circuit breaker.

[0051] like Figures 3-10 As shown, motor module 3 includes a grounding motor and a closing motor located above positioning module 6. The output ends of the grounding motor and the closing motor are respectively provided with grounding socket 3-1 and closing socket 3-2. Motor module 3 is mounted on top plate 2-4-1, and all sockets are located below top plate 2-4-1. Figures 3-10 In this system, all motors are parallel shaft geared motors. Those skilled in the art can also select bidirectional motors such as coaxial geared motors or orthogonal shaft geared motors as needed, as long as the output end of the motor can drive the vertically extending grounding input shaft 1-1 and closing input shaft 1-2 of the operating mechanism 1 to rotate forward and reverse.

[0052] like Figures 4-9 As shown, the switch module 7 includes a grounding stationary contact 7-3, a closing stationary contact 7-4, a rotating shaft 7-1 for anti-rotation engagement with the output shaft 1-5 of the operating mechanism 1, and a moving contact 7-2 fixedly mounted on the rotating shaft 7-1. The rotating shaft 7-1 constitutes the power input shaft of the switch module 7. During the rotation stroke of the moving contact 7-2, the moving contact 7-2 has a grounding position contacting the grounding stationary contact 7-3, a closing position contacting the closing stationary contact 7-4, and an isolation position not in contact with any of the stationary contacts. The friction between the moving contact 7-2 and each stationary contact is used to provide the opening and closing load. Figure 5 The diagram shows the structure of the moving contact 7-2 in the isolation position, corresponding to the state when the operating mechanism 1 opens both the isolating switch and the grounding switch of the isolating grounding switch. Figure 6 The diagram shows the structure of the moving contact 7-2 when it is in the grounding position, corresponding to the state when the operating mechanism 1 closes the grounding switch of the isolating grounding switch; Figure 7 The diagram shows the structure of the moving contact 7-2 in the closed position, corresponding to the state when the operating mechanism 1 closes the isolating grounding switch. Therefore, the switch module 7 in this invention can simulate the states corresponding to the three positions of a real isolating grounding switch. Since the switch module 7 does not need to consider electrical performance, its cost is low, which helps to reduce the test cost of the break-in test.

[0053] like Figure 1 and Figure 2As shown, the mounting plate 1-3 of the operating mechanism 1 is provided with mounting holes 1-4 that mate with bolts to install the operating mechanism 1 in the ring main unit. Since there are only four mounting holes 1-4, only two to four mounting holes 1-4 can be used for positioning. Figures 4-14 As shown, the positioning module 6 includes 2 to 4 expansion shafts 6-1 for insertion into the mounting holes 1-4 of the operating mechanism 1, so as to position the operating mechanism 1 in a state where the output shaft 1-5 and the rotating shaft 7-1 are in a non-rotating engagement. Figure 13 The expansion shaft 6-1 shown is a mechanical expansion shaft, including an expansion head 6-1-1 and an expansion shaft body 6-1-2 divided into multiple pieces at one end. It is equipped with an ACE series compact cylinder, a 2-position 5-way solenoid valve, a throttle valve, and a muffler. After the cylinder drives the expansion head 6-1-1 downwards, the expansion head 6-1-1 pushes open the expansion shaft body 6-1-2, causing the expansion shaft body 6-1-2 to press against the wall of the mounting hole 1-4, thereby positioning the operating mechanism 1 and preventing relative displacement between the operating mechanism 1 and the positioning module 6. Figure 11 As shown, when there are only two expansion shafts 6-1, they can be arranged diagonally so that the two expansion shafts 6-1 are respectively inserted into the two diagonally opposite mounting holes 1-4. Of course, there can also be three or four expansion shafts 6-1, which are respectively inserted into three or four mounting holes 1-4; the expansion shafts 6-1 can also be pneumatic expansion shafts (also known as air expansion shafts) or hydraulic expansion shafts.

[0054] In other embodiments, if the mounting plate 1-3 of the operating mechanism 1 has five, six, or more mounting holes 1-4, the number of expansion pins 6-1 can also be greater. The number of expansion pins 6-1 is at least two to restrict the rotation of the operating mechanism 1.

[0055] like Figures 4-23 As shown, the positioning module 6 and the switch module 7 constitute the passive part, and the motor module 3 constitutes the active part. The active part is used to drive the passive part and the operating mechanism 1 to perform opening and closing actions. At this time, the operating mechanism 1 is fixed to the passive part by the positioning module 6. The lifting module 8 has a break-in mode for driving the motor module 3 and the passive part to move towards each other until each motor is connected to the corresponding input shaft through the socket (e.g., Figures 5-7 and Figure 10 (as shown) and a separation mode for driving motor module 3 and the passive part to move in opposite directions until each motor is disconnected from the corresponding input shaft (as shown). Figure 4 and Figure 8 (As shown).

[0056] In different embodiments, such as Figure 4 and Figure 5As shown, the lifting module 8 can be used solely to drive the passive part to rise and fall, so that after the passive part drives the operating mechanism 1 to rise, the motor module 3 is connected to the operating mechanism 1 in a transmission connection. Simultaneously, it ensures that the operating mechanism 1 remains connected to the switch module 7 during the rising of the passive part. Alternatively, the lifting module 8 can be used solely to drive the motor module 3 to rise and fall, so that after the motor module 3 falls, the motor module 3 is connected to the operating mechanism 1 in a transmission connection. Or, the lifting module 8 can simultaneously drive the motor module 3 and the passive part to rise and fall. All three methods can drive the motor module 3 and the passive part to move towards or away from each other. After sufficient distance is maintained between the motor module 3 and the passive part, the operating mechanism 1 can be installed or replaced. In this invention, the specific function of the lifting module 8 is to drive two vertically arranged objects (motor module 3 and passive part) to move closer to or further away from each other. Those skilled in the art can conceive of various feasible design schemes based on the function of the lifting module 8.

[0057] like Figures 3-7 As shown, control module 4 is fixedly connected to the top plate 2-4-1 of cabinet 2 via a cantilever. Control module 4 is a PLC automatic control module with a control panel, which can be used by operators. Control module 4 communicates with each motor in motor module 3, the power source of lifting module 8, and the power source of expansion shaft 6-1 via cables, WiFi, Bluetooth, or 2.4G networks. The PLC automatic control module is used to control each motor in motor module 3 to drive each input shaft to alternately move to simulate the process of manual break-in operation mechanism 1, thereby automatically performing the break-in test.

[0058] The following explanation uses a single cycle of "closing the isolating switch → opening the isolating switch → closing the grounding switch → opening the grounding switch" as an example. First, the closing motor rotates forward to drive the moving contact 7-2 to the closing position. Then, the closing motor rotates in reverse to drive the moving contact 7-2 to the isolating position. Next, the grounding motor rotates forward to drive the moving contact 7-2 to the grounding position. Finally, the grounding motor rotates in reverse to drive the moving contact 7-2 to the isolating position, thus completing one cycle. Before the operating mechanism 1 leaves the factory, the above cycle can be executed 30 times; when measuring the lifespan of the operating mechanism 1, the above cycle can be executed 5000 times. Of course, the cycle can also start with the closing of the grounding switch.

[0059] Based on the existing technology of using a single motor to drive a single operating handle for forward and reverse rotation, those skilled in the art, after understanding the above-mentioned cycle of motor operation, can know how to design a specific control program, which will not be elaborated here.

[0060] The following provides a detailed explanation of the relative motion between motor module 3 and the passive component.

[0061] In the relative motion mode between the first type of motor module 3 and the passive part, the lifting module 8 is used to drive the passive part to lift.

[0062] like Figures 4-8 and Figures 21-23 As shown, the lifting module 8 includes a fixed seat fixedly connected to the bottom crossbeam of the frame 2-4 and a lifting frame 8-1 that moves and moves with the fixed seat and can be lifted. The fixed seat includes four upright guide columns. The lifting frame 8-1 includes four guide columns sleeved on the guide columns and cooperating with the guide columns, a support platform 8-1-1 connected to the upper end of the guide columns and used to support the operating mechanism 1, and an installation platform 8-1-4 connected to the guide columns and located below the support platform 8-1-1. The expansion shaft 6-1 is set on the support platform 8-1-1. Each contact is located below the support platform 8-1-1, and each stationary contact is fixedly installed on the lifting frame 8-1 by a mounting rod. The upper and lower ends of the mounting rod are fixedly connected to the support platform 8-1-1 and the installation platform 8-1-4 respectively. The stationary contact includes a mounting edge. After the bolt passes through the hole on the mounting edge, it is connected to the threaded hole on the mounting rod to fix the stationary contact on the lifting frame 8-1. The rotating shaft 7-1 is rotatably mounted on the support platform 8-1-1 and the mounting platform 8-1-4, and the rotating shaft 7-1 passes through the support platform 8-1-1 so that the upper end of the rotating shaft 7-1 can be connected to the output shaft 1-5 of the operating mechanism 1 for transmission.

[0063] like Figures 21-23 As shown, in one embodiment, the guide column can be made of national standard 4040E aluminum profile 8-6, and the guide column can be made of national standard 6262 aluminum profile 8-1-2. The four sides of the guide column are provided with converging grooves that can be used to fix the components with bolts and nuts, so as to realize the fixed connection between the guide column, the support platform 8-1-1 and the mounting platform 8-1-4 by using bolts and various adapter components.

[0064] To reduce noise, a 6 mm thick acrylic sheet and a U-shaped adhesive strip can be embedded in the groove of the 8-6 section of the national standard 4040E aluminum profile, thereby improving the noise reduction capability.

[0065] To extend the service life of the automatic break-in equipment, a polyurethane shock-absorbing pad can be added at the contact point between the lifting frame 8-1 and the fixed seat. Specifically, a polyurethane shock-absorbing pad can be added at the contact point between the lower end of the national standard 6262 aluminum profile 8-1-2 and the fixed seat.

[0066] exist Figures 21-23 In this design, a screw lifting mechanism 8-5 is used to achieve lifting. A guide column is fitted onto the fixed part of the screw lifting mechanism 8-5, and the lifting part of the screw lifting mechanism 8-5 is located above and inside the guide column. For example... Figure 21As shown, a lifting motor 8-3 drives the screw lifting mechanism 8-5. The output end of the lifting motor 8-3 is connected to a drive shaft 8-4. A drive shaft through hole 8-1-3 is machined on the guide column. Both ends of the drive shaft 8-4 are connected to two screw lifting mechanisms 8-5 respectively, so as to simultaneously drive the two screw lifting mechanisms 8-5 to ensure the smooth lifting of the lifting frame 8-1. The power from the drive shaft 8-4 is transmitted to the screw lifting mechanism 8-5 and then redirected via a worm gear, before the screw achieves lifting.

[0067] In other embodiments, mechanisms that drive objects to move linearly, such as electric telescopic rods, linear motors, or winches, can also be used as the power source for the lifting mechanism.

[0068] In the relative motion mode between the second type of motor module 3 and the passive part, the lifting module 8 is used to drive the motor module 3 to lift.

[0069] The lifting module 8 includes a lifting platform, which is fixedly installed on the top of the frame 2-4, specifically on the top plate 2-4-1. The motor module 3 is fixedly installed on the lifting platform, and all the sockets are located below the lifting platform (similar to the motor module 3 being installed on the top plate 2-4-1 with the sockets located below the top plate 2-4-1). The frame 2-4 includes a fixed frame for supporting the operating mechanism 1. The upper end of the fixed frame has a fixed platform for supporting the operating mechanism 1. The expansion shaft 6-1 is set on the fixed platform, and all contacts are located below the fixed platform. Each stationary contact is fixedly installed on the fixed frame. The rotating shaft 7-1 is rotatably mounted on the fixed frame and passes through the support platform 8-1-1. The fixed frame can be constructed from... Figure 21 The lifting frame 8-1 is formed by removing the screw lifting mechanism 8-5, the lifting motor 8-3 and the transmission shaft 8-4.

[0070] In such embodiments, the power source driving the lifting platform to rise and fall can be an electric telescopic rod or a linear motor installed between the top plate 2-4-1 and the lifting platform, or a winch installed on the top plate 2-4-1. The wire rope of the winch is connected to the upper end of the lifting platform so that the lifting platform can be raised and lowered by winding and unwinding the wire rope. When the lifting platform descends, the gravity of the lifting platform and the motor module 3 on it drives the corresponding input shaft to connect with the corresponding socket.

[0071] In the relative motion mode between the third type of motor module 3 and the passive part, the above-mentioned lifting platform and the above-mentioned lifting frame 8-1 can be included simultaneously, which will not be described in detail here.

[0072] It should be noted that, as Figure 8 , Figure 9 and Figure 15As shown, a bearing may be provided on the lifting frame 8-1 or the fixed frame. The rotating shaft 7-1 includes a polygonal shaft body 7-1-2 and a cylindrical connecting shaft connected to the lower end of the shaft body 7-1-2. The bearing is connected to the connecting shaft, and a spiral oil groove 7-1-3 is provided on the outer circumferential surface of the connecting shaft to increase the oil immersion effect of the contact surface between the connecting shaft and the bearing, extend the service life of the grease, improve lubrication performance, and reduce the wear rate of the connecting shaft. By providing a bearing on the lifting frame 8-1 or the fixed frame, the rotating shaft 7-1 can be conveniently indirectly mounted on the frame 2-4.

[0073] It should be noted that, in some embodiments, the automatic break-in device further includes an adapter rod 5 for connecting the grounding motor and the closing motor to their respective input shafts. The upper end of the adapter rod 5 has a plug for insertion into a corresponding socket, and the lower end has an adapter socket for insertion into the corresponding input shaft, thereby achieving a transmission connection between the motor and the input shaft. When the lifting module 8 is in break-in mode, the plug is inserted into the corresponding socket to achieve a transmission connection between each motor and its corresponding input shaft. When the lifting module 8 is in disengagement mode, the plug is separated from the corresponding socket to disconnect each motor from its corresponding input shaft.

[0074] The reason for needing to set up the adapter rod 5 in this invention is as follows: Figure 1 , Figures 5-7 and Figure 10 As shown, the highest point of the operating mechanism 1 is higher than the two input shafts. If the adapter rod 5 is not provided, the operating mechanism 1 will interfere with the lower plate surface of the top plate 2-4-1 before the input shaft is inserted into the corresponding socket. Therefore, in the above embodiment, the adapter rod 5 is added to ensure that there is a gap between the highest point of the operating mechanism 1 and the top plate 2-4-1, so as to avoid interference between the operating mechanism 1 and the top plate 2-4-1.

[0075] Knowing the above reasons, various methods can be adopted to avoid interference between the operating mechanism 1 and other components, thus eliminating the need for the adapter rod 5. For example, a clearance hole can be provided on the top plate 2-4-1 to avoid interference with the operating mechanism 1, or the two motor modules 3 can be positioned downwards to provide sufficient space between them, thereby preventing interference between the operating mechanism 1 and the top plate 2-4-1. Of course, knowing the above reasons, those skilled in the art can also adopt other design methods according to actual needs to ensure sufficient clearance between the grounding motor and the closing motor, thus preventing interference between the operating mechanism 1 and other components.

[0076] In this invention, to ensure that the lifting module 8 can better drive the motor module 3 and the passive part to only undergo relative movement in the vertical direction, such as... Figure 8 , Figure 9 and Figure 14As shown, the automatic break-in equipment also includes a guide module 9 connected to the frame 2-4. The guide module 9 includes a guide rod 9-1 with a vertically extending axis and a guide sleeve 9-2. One end of the guide rod 9-1 is inserted into the guide sleeve 9-2 to provide guidance for the relative movement of the motor module 3 and the passive part.

[0077] The following is a detailed description of switch module 7.

[0078] In the first type of switch module 7, both the moving contact 7-2 and the stationary contact consist only of contact plates. The friction between the contact plates of the moving contact 7-2 and the stationary contact is used to provide the opening and closing load. (Refer to...) Figures 4-7 , Figure 15 and Figure 16 As shown, the stationary contact and the moving contact 7-2 have a first contact piece and a second contact piece 7-2-1 respectively. When closing, friction occurs between the first contact piece and the second contact piece 7-2-1. Therefore, the friction force between the first contact piece and the second contact piece 7-2-1 is used to provide the opening and closing load.

[0079] In this type of switch module 7, when installing the stationary contact and the moving contact 7-2, the friction between the moving contact 7-2 and the stationary contact can be adjusted by controlling the relative position of the stationary contact and the moving contact 7-2 in the vertical direction, thereby adjusting the opening and closing load so that the output torque T of each motor satisfies: 60 N·m≤T≤100 N·m.

[0080] In this invention, if a moving contact 7-2, a grounding stationary contact 7-3, and a closing stationary contact 7-4 are defined as a contact group, the number of contact groups can be one, two, or more. When the number of contact groups is greater, the normal pressure and friction between a single moving contact 7-2 and a stationary contact are smaller, thereby effectively reducing the wear rate of each contact.

[0081] In the second type of switch module 7, such as Figures 4-7 , Figure 15 and Figure 16As shown, one of the moving contact 7-2 and the stationary contact has two vertically arranged second contact pieces 7-2-1, and the other has one first contact piece. That is, the moving contact 7-2 has a first contact piece, and the stationary contact has a second contact piece 7-2-1; or, the moving contact 7-2 has a second contact piece 7-2-1, and the stationary contact has a first contact piece. Each second contact piece 7-2-1 is provided with a second threaded hole 7-2-3, and the contact member 7-2-4 is provided with an external thread that matches the second threaded hole 7-2-3, so as to detachably thread the contact member 7-2-4 and the second contact piece 7-2-1. One end face of contact element 7-2-4 is located between the two second contact pieces 7-2-1 and forms a contact surface. When the moving contact 7-2 is in the grounding or closing position, the first contact piece is located between the two second contact pieces 7-2-1, and both the upper and lower end faces of the first contact piece are in contact with the contact surface. Contact element 7-2-4 can be a bolt. Figure 16 In this design, contact element 7-2-4 includes a hexagonal bolt head, a threaded section of medium thickness, and a smooth rod section of the thinnest thickness. The end face of the smooth rod section forms the contact surface. In this case, the threaded section focuses on providing axial locking force, while the smooth rod section focuses on bearing radial shear force. Of course, contact element 7-2-4 can also be any structure with external threads and a contact surface, such as a cylinder with external threads.

[0082] In this type of switch module 7, there is no need to move the positions of the stationary contact and the moving contact 7-2. The friction between the contact 7-2-4 and the first contact piece can be easily adjusted by turning the contact piece 7-2-4, thereby adjusting the opening and closing load so that the output torque T of each motor satisfies: 60 N·m ≤ T ≤ 100 N·m. At the same time, after the contact piece 7-2-4 wears out, it can be directly replaced without replacing the second contact piece 7-2-1, which helps to save costs.

[0083] In a preferred embodiment, the moving contact 7-2 has a second contact piece 7-2-1, and the stationary contact has a first contact piece. The reason for this arrangement is that the moving contact 7-2 needs to rub against the grounding stationary contact 7-3 and the closing stationary contact 7-4, and the number of rubbing times is twice that of each stationary contact, making it more prone to damage. Placing the contact piece 7-2-4 on the moving contact 7-2 can save costs to the greatest extent.

[0084] Based on the above embodiments, the following improvements may be selectively made.

[0085] Improvement 1: such as Figure 16 As shown, the contact elements 7-2-4 connected to the two second contact pieces 7-2-1 of the same contact are arranged vertically opposite each other to optimize the force during closing and improve the service life of the contact elements 7-2-4 and the first contact piece.

[0086] Improvement 2: such as Figure 16As shown, each second contact piece 7-2-1 is provided with at least two contact elements 7-2-4 to reduce the friction between a single contact element 7-2-4 and the first contact piece, reduce the wear rate of the contact element 7-2-4 and the first contact piece, and improve the service life of the contact element 7-2-4 and the first contact piece.

[0087] Improvement 3: such as Figure 15 and Figure 16 As shown, based on the second improvement, a deformation groove 7-2-5 is provided in the middle of the second contact piece 7-2-1, and all contact pieces 7-2-4 connected to the same second contact piece 7-2-1 are evenly distributed on both sides of the deformation groove 7-2-5.

[0088] Since the normal pressure between contact 7-2-4 and the first contact piece is essentially provided by the deformation of the second contact piece 7-2-1, the greater the stiffness of the second contact piece 7-2-1, the greater the change in normal pressure between contact 7-2-4 and the first contact piece per unit number of turns, thus resulting in lower sensitivity when adjusting the opening and closing load. By setting the deformation joint 7-2-5, the stiffness of the deformed part of the second contact piece 7-2-1 can be effectively reduced, thereby making the change in normal pressure between contact 7-2-4 and the first contact piece smaller after turning contact 7-2-4 per unit number of turns, and thus improving the sensitivity when adjusting the opening and closing load.

[0089] Improvement 4: Increase the number of contact groups to reduce the wear rate of contact element 7-2-4 and the first contact piece, thereby improving the service life of contact element 7-2-4 and the first contact piece.

[0090] It should be noted that when there are at least two contact groups, since the output shaft 1-5 of the operating mechanism 1 is directly connected to the rotating shaft 7-1, the opening and closing loads between each contact group are transmitted to the rotating shaft 7-1 and added together before being transmitted to the output shaft 1-5. Therefore, the friction between the moving contact 7-2 and the stationary contact in different contact groups can be different. As long as the total friction between the moving contact 7-2 and the stationary contact meets the standard, it can be guaranteed that 60 N·m ≤ T ≤ 100 N·m.

[0091] Improvements 1, 2, and 4 can all be used individually. In different embodiments, the contact elements 7-2-4 connected to the two second contact pieces 7-2-1 of the same contact can be staggered; or, only one contact element 7-2-4 is connected to each second contact piece 7-2-1; or, the second contact piece 7-2-1 is a complete contact piece without a deformation joint 7-2-5.

[0092] Regarding the connection method between the moving contact 7-2 and the rotating shaft 7-1, in a preferred embodiment, the moving contact 7-2 is sleeved on the rotating shaft 7-1, and the moving contact 7-2 is provided with a first threaded hole 7-2-2. A set screw 7-5 is connected to the first threaded hole 7-2-2 for pressing against the rotating shaft 7-1 to fix the rotating shaft 7-1 and the moving contact 7-2. By turning the set screw 7-5, the position of the moving contact 7-2 can be easily adjusted, thereby adjusting the relative position of the moving contact 7-2 and the stationary contact. At the same time, it also allows for easy replacement of the moving contact 7-2 if it is damaged.

[0093] Since the moving contact 7-2, the stationary contact, and the rotating shaft 7-1 are generally made of metal, which has high strength and wear resistance, in other embodiments the moving contact 7-2 and the rotating shaft 7-1 can also be fixedly connected by welding or other methods.

[0094] In the prior art, the connection ports of the output shafts 1-5 of the operating mechanism 1 used by different ring main units may be different. In order to enable a single automatic break-in device to quickly adapt to the operating mechanism 1 of different ring main units, the present invention has made the following improvements.

[0095] In a preferred embodiment, such as Figure 9 and Figures 17-20 As shown, the rotating shaft 7-1 includes a shaft body 7-1-2 and an adapter 7-1-1 that is connected to the upper end of the shaft body 7-1-2. The lower end of the adapter 7-1-1 is provided with an adapter slot, and the upper end of the shaft body 7-1-2 is inserted into the adapter slot. The upper end of the adapter 7-1-1 is provided with a connector for anti-rotation engagement with the output shaft 1-5.

[0096] Figure 17 and Figure 18 The diagram shows the adapter 7-1-1 corresponding to the operating mechanism 1 of the environmental protection cabinet. One end of the adapter 7-1-1 is provided with an adapter slot that matches the shaft body 7-1-2, specifically an axially extending hexagonal groove 7-1-4 in the diagram. The other end has a radial circular hole 7-1-5. The part with the radial circular hole 7-1-5 constitutes a connector. The connector can be connected to the output shaft 1-5 through a key that passes through the radial circular hole 7-1-5.

[0097] Figure 19 and Figure 20 The figure shows the adapter 7-1-1 corresponding to the operating mechanism 1 for the sulfur hexafluoride cabinet. One end of the adapter 7-1-1 is provided with an adapter slot that matches the shaft body 7-1-2, specifically an axially extending hexagonal groove 7-1-4 in the figure. The other end has an axially extending square groove 7-1-6. The part with the square groove 7-1-6 constitutes a connector. The output shaft 1-5 can be inserted into the square groove 7-1-6 to realize the transmission connection between the output shaft 1-5 and the connector.

[0098] exist Figure 9 and Figure 14 In the embodiment shown, a bearing is installed in the bearing mounting hole 8-2 of the support platform 8-1-1, and the adapter 7-1-1 is installed on the bearing to reduce the wear rate of the adapter 7-1-1.

[0099] In the prior art, since the output shaft 1-5 of the operating mechanism 1 also needs to use the same structure as the two types of connectors mentioned above when connecting to the isolation grounding switch, those skilled in the art can know how to make the connector and the output shaft 1-5 drive connection.

[0100] In other embodiments, the adapter 7-1-1 may be omitted, and two automatic break-in devices may be installed, one of which is dedicated to the break-in test of the operating mechanism 1 for the environmental protection cabinet, and the other is dedicated to the break-in test of the operating mechanism 1 for the sulfur hexafluoride cabinet.

[0101] An embodiment of the break-in method provided by this invention: Reference Figures 1-23 As shown, the break-in method in this invention can be implemented using the automatic break-in equipment in the embodiment of the automatic break-in equipment for the operating mechanism of the isolation grounding switch of this invention.

[0102] One break-in method involves performing the following steps during the break-in period: Step 1: Expand the expansion shaft 6-1 after passing through the mounting hole 1-4 to position the operating mechanism 1, and at the same time make the output shaft 1-5 of the operating mechanism 1 anti-rotate with the rotating shaft 7-1 of the switch module 7. Step 2: Use the lifting module 8 to make the motor module 3 and the operating mechanism 1 move towards each other until each motor is connected to the corresponding input shaft through the socket. Step 3: Control each motor to drive each input shaft to move alternately to conduct a break-in test.

[0103] When the switch module 7 of the automatic break-in equipment includes contact components 7-2-4, in step 3, the threaded component can be screwed to adjust the total friction between the moving contact 7-2 and the stationary contact, so that the output torque T of each motor satisfies: 60 N·m≤T≤100 N·m.

[0104] When the switch module 7 of the automatic running-in equipment does not include the contact component 7-2-4, the relative position of the moving contact 7-2 and the stationary contact in the vertical direction in the switch module 7 can be adjusted during the assembly of the automatic running-in equipment, thereby adjusting the total friction between the moving contact 7-2 and the stationary contact, so that the output torque T of each motor satisfies: 60 N·m≤T≤100 N·m.

[0105] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features, or organically combine different embodiments to create the embodiments shown in the accompanying drawings. Of course, those skilled in the art can also create other embodiments not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic break-in device for an operating mechanism of an isolating grounding switch, characterized in that, It includes a frame, on which a control module, a motor module, a lifting module, a positioning module, and a switch module for simulating the opening and closing of an isolating grounding switch are mounted; The motor module includes a grounding motor and a closing motor located above the positioning module. The output terminals of the grounding motor and the closing motor are respectively provided with grounding sockets and closing sockets. The switch module includes a rotating shaft for anti-rotation engagement with the output shaft of the operating mechanism; The positioning module includes at least two expansion shafts for insertion into the mounting holes of the operating mechanism, so as to position the operating mechanism in a state where the output shaft and the rotating shaft are locked in place. The positioning module and the switch module are defined as the passive part. The lifting module has a running-in mode for driving the motor module and the passive part to move towards each other until each motor is connected to the corresponding input shaft through the socket, and a separation mode for driving the motor module and the passive part to move away from each other until each motor is disconnected from the corresponding input shaft. The control module communicates with each motor and is used to control each motor to drive each input shaft to alternately move in order to conduct a break-in test.

2. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 1, characterized in that, The lifting module is used to drive the passive part to lift. The lifting module includes a lifting frame that can be lifted. The upper end of the lifting frame has a support platform for supporting the operating mechanism. The expansion shaft is set on the support platform. All contacts of the switch module are located below the support platform, and all stationary contacts of the switch module are fixedly installed on the lifting frame. The rotating shaft is mounted on the lifting frame and passes through the support platform.

3. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 1, characterized in that, The lifting module is used to drive the motor module to lift. The lifting module includes a lifting platform, the motor module is fixedly installed on the lifting platform, and all the sockets are located below the lifting platform. The frame includes a fixed frame for supporting the operating mechanism. The upper end of the fixed frame has a fixed platform for supporting the operating mechanism. The expansion shaft is set on the fixed platform. Each contact of the switch module is located below the fixed platform, and each stationary contact of the switch module is fixedly installed on the fixed frame. The rotating shaft is rotatably assembled on the fixed frame and passes through the support platform.

4. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in any one of claims 1 to 3, characterized in that, The moving contact and the stationary contact of the switch module each have two second contact pieces arranged vertically, and the other has a first contact piece. Each second contact piece can be detachably threaded with a contact element. The end face of one end of the contact element is located between the two second contact pieces and forms a contact surface. When the moving contact is in the grounding position or the closing position, the first contact piece is located between the two second contact pieces, and both the upper and lower end faces of the first contact piece are in contact with the contact surface.

5. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 4, characterized in that, The contact elements connected to the two second contact pieces of the same contact are arranged vertically opposite each other.

6. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 4, characterized in that, Each second contact piece is provided with at least two contact elements.

7. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 6, characterized in that, A deformation groove is provided in the middle of the second contact piece, and all contact pieces connected to the same second contact piece are evenly distributed on both sides of the deformation groove.

8. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 4, characterized in that, Stationary contacts are divided into grounding stationary contacts and closing stationary contacts. A contact group is defined as consisting of a moving contact, a grounding stationary contact, and a closing stationary contact. The number of contact groups is at least two.

9. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in claim 4, characterized in that, The moving contact is fitted onto the rotating shaft, and the moving contact has a threaded hole. A set screw is connected to the threaded hole to press against the rotating shaft to fix the rotating shaft and the moving contact.

10. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in any one of claims 1 to 3, characterized in that, Each motor is equipped with an adapter rod for connecting the motor to the corresponding input shaft. The upper end of the adapter rod has a plug for inserting into the corresponding socket, and the lower end has an adapter socket for inserting the corresponding input shaft. When the lifting module is in the break-in mode, the plug is inserted into the corresponding socket to achieve the transmission connection between each motor and the corresponding input shaft. When the lifting module is in the separation mode, the plug is separated from the corresponding socket to disconnect each motor from the corresponding input shaft.

11. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in any one of claims 1 to 3, characterized in that, The rotating shaft includes a shaft body and an adapter connected to the upper end of the shaft body. The lower end of the adapter is provided with an adapter slot, and the upper end of the shaft body is inserted into the adapter slot. The upper end of the adapter is provided with a connector for engaging with the output shaft to prevent rotation.

12. The automatic break-in equipment for the operating mechanism of the isolating grounding switch as described in any one of claims 1 to 3, characterized in that, The rotating shaft includes a polygonal shaft body and a cylindrical connecting shaft connected to the lower end of the shaft body. Bearings are mounted on the frame and connected to the connecting shaft. The outer circumferential surface of the connecting shaft is provided with a spiral oil groove.

13. A break-in method, characterized in that, The operating mechanism of the isolating grounding switch is run-in using an automatic break-in device according to any one of claims 1 to 3, and the following steps are performed during the break-in process: Step 1: Expand the expansion shaft after passing through the mounting hole to position the operating mechanism, and at the same time, make the output shaft of the operating mechanism anti-rotate with the rotating shaft of the switch module; Step 2: Use the lifting module to move the motor module and the operating mechanism toward each other until each motor is connected to the corresponding input shaft through the socket. Step 3: Control each motor to drive each input shaft to move alternately to conduct a break-in test.

14. The break-in method as described in claim 13, characterized in that, The operating mechanism of the isolating grounding switch is run-in using an automatic running-in device according to any one of claims 4 to 9. In step 3, the threaded parts are screwed to adjust the total friction between the moving contact and the stationary contact, so that the output torque T of each motor satisfies: 60 N·m ≤ T ≤ 100 N·m.

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