A device for circuit breaker travel dimension adjustment

Abstract

The utility model belongs to the technical field of circuit breaker auxiliary tooling, disclose a device for circuit breaker stroke size adjustment, including movable lift trolley, mechanism box and control box are installed on the top of lift trolley, mechanism box is installed with servo electric cylinder, servo electric cylinder's push rod extends mechanism box, is used for with circuit breaker body pull rod butt joint, servo electric cylinder is connected with control box, the outside installation of mechanism box has the connecting support, and the connecting support is used for with circuit breaker butt joint, and the connecting support and push rod extension end are located in the same side, the front end fixed with laser range finder of push rod extension section, and laser range finder is connected with control box, is used for when circuit breaker reaches just the relative distance of the front end of push rod of servo electric cylinder and circuit breaker when reaching the point state, measures. The length of stroke of the existing tooling to the pull rod of circuit breaker body is adjusted, is relatively complex, is time -consuming and labor -saving, and the problem of low precision is solved.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker auxiliary tooling technology, specifically relating to a device for adjusting the stroke size of a circuit breaker. Background Technology

[0002] In the manufacturing process of gas-insulated metal-enclosed switchgear (GIS) ultra-high voltage equipment, the high-voltage circuit breaker plays a core role as a core component in the entire high-voltage switch. The power for controlling the current switching process comes from a high-thrust hydraulic mechanism. During the assembly of the hydraulic mechanism with the circuit breaker, the extension and retraction length of the transmission rod of the circuit breaker body has strict dimensional requirements to ensure the normal operation of the ultra-high voltage circuit breaker.

[0003] In the production of circuit breakers, each step of the process requires strict control of assembly parameters to ensure normal equipment operation. One crucial step in the assembly process is the connection between the circuit breaker body and the hydraulic mechanism. Previously, when assembling the hydraulic mechanism, two steps were necessary: ​​First, the length of the circuit breaker pull rod corresponding to the "just-closed point" (the state where the two contacts inside the circuit breaker just touch) had to be adjusted, measured, and recorded. This allowed for finding the initial position of the circuit breaker pull rod during the hydraulic mechanism assembly and prevented reassembly of the hydraulic mechanism in case of later problems. Second, before assembling the hydraulic mechanism, the circuit breaker body had to be in the open position (the circuit breaker was in the disconnected state), and the opening stroke had to be measured to ensure it met the specified value, guaranteeing that the mechanism was assembled in the correct open position.

[0004] The existing method for adjusting the stroke length of the circuit breaker body tie rod by using a screw rod and nut tooling to complete the above steps has the following disadvantages: 1. It requires a large number of operators; 2. It is laborious to turn the screw rod and nut during adjustment, and the manual rotation takes too long; 3. The connection between the top of the screw rod and the circuit breaker body tie rod is not easy to connect; 4. When the adjustment of the screw rod tooling is close to completion, the operator has to use a steel ruler to repeatedly measure and confirm whether the dimensions are qualified, and the measurement accuracy is low.

[0005] In summary, the existing tooling for adjusting the stroke length of the circuit breaker body tie rod is relatively complex, time-consuming, labor-intensive, and has low accuracy. Utility Model Content

[0006] The purpose of this invention is to provide a device for adjusting the stroke length of a circuit breaker, which solves the problems of existing tooling for adjusting the stroke length of the circuit breaker body tie rod being complicated, time-consuming, labor-intensive, and having low accuracy.

[0007] This utility model is achieved through the following technical solution:

[0008] This utility model discloses a device for adjusting the stroke size of a circuit breaker, including a movable lifting trolley, with a mechanism box and a control box installed on the top of the lifting trolley;

[0009] A servo electric cylinder is installed in the mechanism box. The push rod of the servo electric cylinder extends out of the mechanism box and is used to dock with the circuit breaker body pull rod; the servo electric cylinder is connected to the control box.

[0010] A connecting bracket is installed on the outside of the mechanism box, which is used to connect to the circuit breaker;

[0011] The connecting bracket and the extended end of the push rod are located on the same side;

[0012] A laser rangefinder is fixed at the front end of the extended section of the push rod. The laser rangefinder is connected to the control box and is used to measure the relative distance between the front end of the push rod of the servo electric cylinder and the circuit breaker when the circuit breaker reaches the just-closed state.

[0013] Furthermore, the lifting trolley is an electric lifting trolley.

[0014] Furthermore, the bottom of the lifting trolley is equipped with rollers and a braking mechanism.

[0015] Furthermore, the connecting bracket consists of two symmetrically arranged bent rods, each including a horizontal section and an inclined section. The inclined section is connected to the mechanism box, and an arc-shaped connecting plate is installed at the end of the horizontal section. The arc-shaped connecting plate is used to abut against the circuit breaker housing.

[0016] Furthermore, the two inclined segments form a V-shaped structure.

[0017] Furthermore, the servo electric cylinder includes a servo motor, a cylinder body, and a push rod. The push rod is connected to a slider, which is used to perform linear reciprocating motion inside the cylinder body.

[0018] Two magnetic limit sensors are installed in the inner wall of the mechanism box, namely the first magnetic sensor and the second magnetic sensor. The first magnetic sensor is installed near the servo motor, and the second magnetic sensor is installed near the circuit breaker. The two magnetic limit sensors are used to limit the travel range of the push rod.

[0019] Furthermore, after the push rod of the servo electric cylinder contacts the circuit breaker body tie rod, the push rod and the circuit breaker body tie rod are fixedly connected by quick clamps.

[0020] Furthermore, the conductors of the movable and stationary structures in the circuit breaker body are each connected to a signal acquisition line, and the other ends of the two signal acquisition lines are connected to the PLC input terminal in the control box.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The purpose of this utility model is to provide a device for adjusting the stroke size of a circuit breaker. It adopts a design that combines an electric lifting platform and a servo electric cylinder, so that the mechanical characteristics of the circuit breaker can be tested without affecting the normal operation of the equipment, without interrupting the operation of the equipment, which significantly improves the testing efficiency.

[0023] This utility model utilizes the cooperation between a servo electric cylinder and a control box to precisely control the movement of the servo electric cylinder push rod, thereby achieving precise adjustment of the circuit breaker body pull rod. This ensures the consistency between the extension and retraction of the body pull rod and the stroke of the hydraulic mechanism during the circuit breaker's opening and closing process, and improves the accuracy of the circuit breaker's mechanical characteristics.

[0024] This invention uses a laser rangefinder to provide feedback on the relative distance between the front end of the push rod of the servo electric cylinder and the pull rod of the circuit breaker body. The distance of the contact point can be clearly obtained through the control box, thus achieving precise adjustment of the circuit breaker's stroke size and solving the problem of insufficient sensor accuracy in the prior art.

[0025] Furthermore, the connecting bracket forms a V-shaped structure to reduce weight, increase observation space, and facilitate connection when docking circuit breakers.

[0026] Furthermore, the design of the quick clamp and connecting bracket makes the connection between the circuit breaker and the servo electric cylinder more convenient, eliminating the need for complicated installation and debugging processes, and greatly simplifying the installation and maintenance of the equipment. Attached Figure Description

[0027] Figure 1 This is a front view of the device of this utility model;

[0028] Figure 2 This is a side view of the device of this utility model;

[0029] Figure 3 This is a three-dimensional model diagram of the device of this utility model.

[0030] The components include: 1. Electric lifting platform; 2. Control box; 3. Mechanism box; 4. Connecting bracket; 5. Quick clamp; 6. Laser rangefinder; 7. Servo electric cylinder; 8. Circuit breaker body tie rod; 9. Circuit breaker. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it; that is, the described embodiments are only a part of, and not all, of the embodiments of this utility model.

[0032] The components described and illustrated in the accompanying drawings and embodiments of this utility model can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this utility model provided in the following drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate one selected embodiment of the utility model. All other embodiments obtained by those skilled in the art based on the accompanying drawings and embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0033] The following is an explanation of the relevant technical terms:

[0034] Circuit breaker: The circuit breaker is a core component in the combination switch, which can disconnect normal current and abnormal current in the circuit.

[0035] Hydraulic mechanism: In combination switches, it is a power component. During the mechanical opening and closing process of the circuit breaker, it is the power source. It can release a large amount of thrust and displacement of the push rod instantly and cannot stop outputting in the middle.

[0036] Circuit breaker body tie rod: The transmission link connecting the hydraulic mechanism during the opening and closing of the circuit breaker.

[0037] Tripping: The state in which a circuit breaker disconnects the current in a line.

[0038] Closing: The state of the circuit breaker when it connects the current in the line.

[0039] Rigid closing point: During the closing process, the internal structure of the circuit breaker is composed of a movable structure and a stationary structure. When the movable structure and the stationary structure just come into contact, it is called the rigid closing point.

[0040] Slow opening and slow closing: Before connecting the hydraulic mechanism, the initial position of the circuit breaker body tie rod 8 must be determined. At this time, external force (without hydraulic mechanism) should be used to slowly adjust the size of the body tie rod into place.

[0041] Connection: This device is connected to the circuit breaker body, or the hydraulic mechanism is connected to the circuit breaker body.

[0042] Travel Dimension: During the opening and closing process of the circuit breaker, the extension and retraction of the circuit breaker body rod 8 must meet certain distance requirements. This fixed distance is the circuit breaker travel. The circuit breaker travel must be consistent with the hydraulic mechanism travel (the travel is fixed at the factory).

[0043] like Figures 1-3 As shown, this utility model discloses a device for adjusting the stroke size of a circuit breaker. The overall structure includes an electric lifting platform 1, a control box 2, a mechanism box 3, a connecting bracket 4, a quick clamp 5, and a laser rangefinder 6. A servo electric cylinder 7 is installed in the mechanism box 3.

[0044] The servo electric cylinder 7 and the quick clamp 5 constitute its transmission system.

[0045] Two symmetrically arranged connecting brackets 4 are installed at the front end of the mechanism box 3. An arc-shaped connecting plate is installed at the end of the connecting bracket 4. The arc-shaped connecting plate is used to abut against the housing of the circuit breaker.

[0046] like Figure 3 As shown, the mechanism box 3 and the control box 2 are placed on the electric lifting platform 1, forming a whole, and can be moved freely by one person.

[0047] The electric lifting platform 1 is equipped with rollers at the bottom for supporting and moving the entire tooling. The electric lifting platform 1 is provided with mounting slots for fixing the control box 2 and the mechanism box 3. The electric lifting platform 1 can be raised and lowered in the vertical direction.

[0048] This utility model is powered by a servo electric cylinder 7, which includes a servo motor, a cylinder body, and a push rod. The push rod moves linearly back and forth inside the cylinder body via a slider.

[0049] The end of the push rod is connected to the circuit breaker body pull rod 8 by a clamp. The servo electric cylinder 7 is connected to the controller in the control box 2. The controller can realize the reciprocating motion of the push rod of the servo electric cylinder 7 and adjust the speed and distance of the electric cylinder. The control box 2 is equipped with an operation panel and an emergency stop button to prevent misoperation.

[0050] A high-precision laser rangefinder 6 is installed at the front end of the servo electric cylinder 7 to provide real-time feedback on the relative distance between the end of the push rod of the servo electric cylinder 7 and the circuit breaker 9.

[0051] The operation panel is a touch-screen panel, through which parameters such as speed and distance of the device can be read and the device parameters can be changed; the dimensional accuracy is at the micrometer level.

[0052] Specifically, the quick clamp 5 adopts a split structure, including a clamp body and a locking mechanism. The clamp body is provided with a through hole for fixing the push rod of the servo electric cylinder 7, and the locking mechanism is used to fix the quick clamp 5 to the circuit breaker body pull rod 8.

[0053] The laser rangefinder 6 uses a high-precision laser sensor, which is installed at the front end of the push rod of the servo electric cylinder 7. It is used to measure the relative distance between the front end of the push rod of the servo electric cylinder 7 and the circuit breaker 9 in real time, and to feed the data back to the control box 2.

[0054] More preferably, two magnetic limit sensors are installed in the inner wall of the mechanism housing 3, namely a first magnetic sensor and a second magnetic sensor. The first magnetic sensor is installed near the servo motor, and the second magnetic sensor is installed near the circuit breaker. The two sensors are used to limit the range of the push rod's stroke. Correspondingly, a magnet is embedded in the slider.

[0055] As the push rod moves toward the circuit breaker, when the magnet approaches the second magnetic limit sensor, it indicates that the push rod has reached its maximum extension distance. The second magnetic limit sensor then sends a signal to the controller to stop the servo electric cylinder 7, preventing overtravel damage to the equipment.

[0056] When the push rod retracts into the mechanism box 3, as the push rod returns to its original position, when the magnet approaches the first magnetic limit sensor, it indicates that the push rod has returned to its original position. The second magnetic limit sensor then outputs a signal to the controller, controlling the servo electric cylinder 7 to stop.

[0057] There are two signal acquisition lines, which are respectively connected to the conductors of the movable and stationary structures in the circuit breaker body, and are used to acquire signals during the opening and closing process of the circuit breaker and feed them back to the control box 2.

[0058] The servo electric cylinder 7 is a bidirectional servo electric cylinder. The reciprocating motion of the push rod can be realized through the controller, and the maximum stroke, movement speed and other parameters of the push rod can be set through the control box 2.

[0059] The use of the device for adjusting the stroke size of a circuit breaker according to this invention will be described below with reference to the accompanying drawings.

[0060] Step 1: Move the lifting platform 1 to the front of the circuit breaker body tie rod 8, adjust the height of the moving lifting platform 1 so that the push rod in the servo electric cylinder 7 and the circuit breaker body tie rod 8 are coaxial in the horizontal direction, and connect the connecting bracket 4 and the circuit breaker 9 with bolts.

[0061] Step 2: Operate the control box 2 to slowly push the push rod in the servo electric cylinder 7 until it contacts the circuit breaker body pull rod 8, and use the quick clamp 5 to fix the push rod in the servo electric cylinder 7 to the circuit breaker body pull rod 8.

[0062] Step 3: Connect the signal acquisition lines to the conductors of the movable and stationary structures in the circuit breaker body, respectively. Connect the other end of the two signal acquisition lines to the PLC input terminal in the control box to receive signals. After pressing the start button, operate the control box 2 to slowly push the push rod in the servo electric cylinder 7 into the circuit breaker body pull rod 8, causing the circuit breaker 9 to slowly close. When the circuit breaker reaches the "just-closed point", it means that the movable and stationary structures have just made contact. At this time, the signal acquisition lines conduct current to form a loop, which is transmitted to the PLC input terminal in the control box 2. The control box 2 issues a command to stop pushing. The laser rangefinder 6 feeds back the relative distance L1 between the front end of the push rod of the servo electric cylinder 7 and the circuit breaker 9 and records it. After recording, continue to operate the control box 2 to input the opening stroke distance, so that the servo electric cylinder 7 moves linearly back to its original position, driving the circuit breaker body pull rod 8, so that the circuit breaker 9 is opened.

[0063] Disassemble the quick clamp 5, operate the control box 2 to return the servo electric cylinder 7 to the zero position, then disassemble the connecting bracket 4 and the circuit breaker 9, and move the electric lifting platform 1 to the specified position. The operation is complete.

[0064] If the circuit breaker body lever 8 is required to extend from the circuit breaker body by a distance of L2 mm when the circuit breaker is in the open state, but the position of the circuit breaker body lever 8 is unknown in the initial state, the circuit breaker may be in a state between closing and opening. Therefore, it is necessary to measure the distance L1 between the circuit breaker body lever 8 and the circuit breaker body when the circuit breaker reaches the "just-closed point". Then, the input opening stroke distance is (L2-L1) mm, which will make the circuit breaker body lever 8 return to the fully open state.

[0065] The purpose of measuring the distance of the contact point is to mark the initial value. Even if the position of the tie rod is displaced during later repairs, the relative travel distance can be calculated based on the position of the contact point to ensure that the travel dimensions are not incorrect.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A device for adjusting the stroke dimension of a circuit breaker, characterized in that, It includes a movable lifting trolley, on which a mechanism box (3) and a control box (2) are installed. A servo electric cylinder (7) is installed in the mechanism box (3). The push rod of the servo electric cylinder (7) extends out of the mechanism box (3) and is used to dock with the circuit breaker body pull rod (8). The servo electric cylinder (7) is connected to the control box (2). A connecting bracket (4) is installed on the outside of the mechanism box (3), and the connecting bracket (4) is used to connect with the circuit breaker; The connecting bracket (4) and the extended end of the push rod are located on the same side; A laser rangefinder (6) is fixed at the front end of the push rod extension section. The laser rangefinder (6) is connected to the control box (2) and is used to measure the relative distance between the front end of the push rod of the servo electric cylinder (7) and the circuit breaker when the circuit breaker reaches the closing point.

2. The device for adjusting the stroke size of a circuit breaker according to claim 1, characterized in that, The lifting trolley is electric.

3. The device for adjusting the stroke dimension of a circuit breaker according to claim 1, characterized in that, The bottom of the lifting trolley is equipped with rollers and a braking mechanism.

4. The device for adjusting the stroke dimension of a circuit breaker according to claim 1, characterized in that, The connecting bracket (4) consists of two symmetrically arranged bent rods, each including a horizontal section and an inclined section. The inclined section is connected to the mechanism box (3), and an arc-shaped connecting plate is installed at the end of the horizontal section. The arc-shaped connecting plate is used to abut against the housing of the circuit breaker.

5. The device for adjusting the stroke dimension of a circuit breaker according to claim 4, characterized in that, The two inclined sections form a V-shaped structure.

6. The device for adjusting the stroke dimension of a circuit breaker according to claim 1, characterized in that, The servo electric cylinder (7) includes a servo motor, a cylinder body and a push rod. The push rod is connected in the slider, and the slider is used to make linear reciprocating motion inside the cylinder body. Two magnetic limit sensors are installed in the inner wall of the mechanism box (3), namely a first magnetic sensor and a second magnetic sensor. The first magnetic sensor is installed near the servo motor, and the second magnetic sensor is installed near the circuit breaker. The two magnetic limit sensors are used to limit the range of the push rod's stroke.

7. The device for adjusting the stroke dimension of a circuit breaker according to claim 1, characterized in that, When the push rod of the servo electric cylinder (7) contacts the circuit breaker body pull rod (8), the push rod and the circuit breaker body pull rod (8) are fixedly connected by quick clamps (5).

8. The device for adjusting the stroke dimension of a circuit breaker according to claim 1, characterized in that, The conductors of the movable and stationary structures in the circuit breaker body are each connected to a signal acquisition line, and the other end of the two signal acquisition lines is connected to the PLC input terminal in the control box (2).

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