Retention force detection system of permanent magnet operating mechanism of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breaker detection, and particularly relates to a holding force detection system of a permanent magnet operating mechanism of a circuit breaker. Comprising a supporting frame, a driving device, a lifting mechanism, a force measuring sensor and an opening connecting rod, the driving device is installed at the top of the supporting frame, an output shaft of the driving device is connected with the lifting mechanism, the bottom of the lifting mechanism is connected with the top of the force measuring sensor, the bottom of the force measuring sensor applies pressure to the opening connecting rod, and the opening connecting rod is connected with the lifting mechanism. A permanent magnet operating mechanism is mounted on a bottom mounting plate of the supporting frame, and the opening connecting rod is connected with the permanent magnet operating mechanism. According to the utility model, the lifting mechanism is driven by the driving device to lift, the opening connecting rod is pressed down by the force measuring sensor, the opening of the permanent magnet operating mechanism is realized, the closing holding force is obtained by the detection of the force measuring sensor, the operation is simple, and the testing efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breaker detection, and particularly relates to a holding force detection system for a permanent magnet operating mechanism of a circuit breaker. Background Art

[0002] Vacuum circuit breakers have been widely developed and gradually gained a dominant position in the power distribution field. Currently, the mainstream vacuum circuit breakers basically adopt spring energy storage operating mechanisms. However, compared with spring energy storage operating mechanisms, the output characteristics of permanent magnet operating mechanisms are more in line with the requirements of arc extinguishing chambers and are more suitable for the operating requirements of high-voltage AC circuit breakers. At the same time, the mechanical structure of permanent magnet mechanism circuit breakers is extremely simple, with the number of parts only being 50% of that of traditional spring operating mechanisms, and the number of movable parts being further reduced to only a few.

[0003] In order to ensure that the permanent magnet operating mechanism is qualified after assembly and debugging, and to ensure that the closing holding force of each permanent magnet operating mechanism is within a certain range, it is necessary to test the closing holding force of the permanent magnet operating mechanism before it is installed on the whole machine. The traditional testing methods are mostly manual detection, which is time-consuming and laborious. Therefore, there is an urgent need for a holding force detection device for permanent magnet operating mechanisms. Summary of the Invention

[0004] The utility model provides a holding force detection system for a permanent magnet operating mechanism of a circuit breaker to meet the detection of the closing holding force of the permanent magnet operating mechanism, thereby solving the technical problems mentioned in the background art.

[0005] The technical solution of the utility model is as follows: A holding force detection system for a permanent magnet operating mechanism of a circuit breaker, comprising: a support frame, a driving device, a lifting mechanism, a force measuring sensor, and a tripping link. The driving device is installed on the top of the support frame, the output shaft of the driving device is connected to the lifting mechanism, the bottom of the lifting mechanism is connected to the top of the force measuring sensor, the bottom of the force measuring sensor applies pressure to the tripping link, a permanent magnet operating mechanism is installed on the bottom mounting plate of the support frame, and the tripping link is connected to the permanent magnet operating mechanism;

[0006] The driving device is used to drive the lifting mechanism, the lifting mechanism is used to drive the tripping link to move up and down, thereby changing the opening and closing states of the permanent magnet operating mechanism, and the force measuring sensor is used to detect the closing holding force of the permanent magnet operating mechanism.

[0007] Further, it further comprises: a controller and a displacement detection mechanism, and the controller is respectively connected to the displacement detection mechanism and the driving device;

[0008] The displacement detection mechanism is installed on one side of the lifting mechanism. The displacement detection mechanism is used to detect the displacement of the lifting mechanism and generate a displacement detection signal. The controller controls the start and stop of the driving device according to the displacement detection signal.

[0009] Further, the displacement detection mechanism includes: a limit toggle plate, a limit fixing plate, and a limit switch. The limit fixing plate is connected to the support frame and arranged on one side of the lifting mechanism. The limit switch is installed on the limit fixing plate. One end of the limit toggle plate is connected to the lifting mechanism, and the other end is close to the limit switch. The limit toggle plate moves up and down under the drive of the lifting mechanism, and the limit switch detects the displacement of the limit toggle plate to generate the displacement detection signal.

[0010] Further, the lifting mechanism includes: a lead screw and a lead screw nut. The lead screw is connected to the output shaft of the driving device. The lead screw nut is threadedly connected to the lead screw. The top of the lead screw nut is connected to the limit toggle plate, and the bottom of the lead screw nut is connected to the force measuring sensor.

[0011] Further, a middle layer support plate is arranged in the middle of the support frame. A guiding installation cylinder is arranged inside the middle layer support plate. The lead screw nut is slidably arranged inside the guiding installation cylinder. The guiding installation cylinder is provided with guiding sliders, and corresponding guiding grooves are arranged on the outer wall of the lead screw nut.

[0012] Further, a top layer installation plate is arranged at the top of the support frame. A control box is arranged above the top layer installation plate. The controller and the driving device are installed inside the control box.

[0013] Further, control buttons are arranged on the outer side of the control box.

[0014] Further, a display screen is arranged on the outer side of the control box. The display screen is used to display the detection value of the force measuring sensor.

[0015] Further, a pressure plate is arranged at the bottom of the force measuring sensor. The pressure plate applies pressure to the opening link during the descending process.

[0016] Further, the driving device is a stepping motor.

[0017] The beneficial effects of the present utility model: The present utility model drives the lifting mechanism to rise and fall through the driving device, presses down the opening link by the force measuring sensor to realize the opening of the permanent magnet actuator, and obtains the closing holding force by detecting with the force measuring sensor. The present utility model has simple operation and high test efficiency. Description of the Drawings

[0018] Figure 1It is a schematic structural diagram of the present utility model.

[0019] Figure 2 It is Figure 1 a partial enlarged view of part A in

[0020] Figure 3 It is Figure 1 a partial enlarged view of part B in

[0021] Figure 4 It is a closing diagram of the permanent magnet operating mechanism of the circuit breaker.

[0022] Figure 5 It is a tripping diagram of the permanent magnet operating mechanism of the circuit breaker.

[0023] Figure 6 It is a control structure block diagram of the present utility model. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] In the embodiments of the present utility model, Figure 1 It is a schematic structural diagram provided according to the specific structure of a holding force detection system of a permanent magnet operating mechanism of a circuit breaker according to the present utility model. As Figure 1 shown, the present utility model specifically includes the following parts:

[0026] A support frame (2), a driving device (9), a lifting mechanism, a force measuring sensor (5) and a tripping link (3). The driving device (9) is installed at the top of the support frame (2). The output shaft of the driving device (9) is connected to the lifting mechanism. The bottom of the lifting mechanism is connected to the top of the force measuring sensor (5). The bottom of the force measuring sensor (5) applies pressure to the tripping link (3). A permanent magnet operating mechanism (1) is installed on the bottom mounting plate (23) of the support frame (2). The tripping link (3) is connected to the permanent magnet operating mechanism (1).

[0027] The driving device (9) is used to drive the lifting mechanism. The lifting mechanism is used to drive the tripping link (3) to move up and down, thereby changing the closing and tripping states of the permanent magnet operating mechanism (1). The force measuring sensor (5) is used to detect the closing holding force of the permanent magnet operating mechanism (1).

[0028] In an embodiment of the present utility model, as Figure 1 and Figure 6 shown, the present utility model further includes: a controller (17) and a displacement detection mechanism (16), and the controller (17) is respectively connected to the displacement detection mechanism (16) and the driving device (9);

[0029] The displacement detection mechanism (16) is installed on one side of the lifting mechanism, and the displacement detection mechanism (16) is used to detect the displacement of the lifting mechanism, generate a displacement detection signal, and the controller (17) controls the start and stop of the driving device (9) according to the displacement detection signal.

[0030] Among them, the controller (17) can be a PLC controller and a driving device controller. When the driving device is a stepping motor, the driving device controller is a stepping motor controller.

[0031] In an embodiment of the present utility model, as Figure 3 shown, the displacement detection mechanism (16) includes: a limit toggle plate (12), a limit fixing plate (13) and a limit switch (14). The limit fixing plate (13) is connected to the support frame (2) and is arranged on one side of the lifting mechanism. The limit switch (14) is installed on the limit fixing plate (13). One end of the limit toggle plate (12) is connected to the lifting mechanism, and the other end is close to the limit switch (14). The limit toggle plate (12) moves up and down under the drive of the lifting mechanism, and the limit switch (14) detects the displacement of the limit toggle plate (12) to generate the displacement detection signal.

[0032] More specifically, the limit switch (14) includes an upper limit switch 14A and a lower limit switch 14B. The upper limit switch 14A and the lower limit switch 14B respectively correspond to the highest limit point and the lowest limit point of the lifting mechanism. When the upper limit switch 14A or the lower limit switch 14B detects the limit toggle plate (12), a corresponding displacement detection signal is generated. The controller judges according to the displacement detection signal of the upper limit switch 14A or the lower limit switch 14B and controls the driving motor to perform corresponding actions. For example, when the upper limit switch 14A detects the limit toggle plate (12), it means that the lifting mechanism reaches the maximum height. At this time, the controller stops the driving motor and then controls the driving motor to rotate forward and descend.

[0033] In an embodiment of the present utility model, the lifting mechanism includes: a lead screw (8) and a lead screw nut (7). The lead screw (8) is connected to the output shaft of the driving device (9), the lead screw nut (7) is threadedly connected to the lead screw (8), the top of the lead screw nut (7) is connected to the limit toggle plate (12), and the bottom of the lead screw nut (7) is connected to the force sensor (5).

[0034] The driving motor drives the lead screw (8) to rotate, thereby driving the lead screw nut (7) to move up and down along the lead screw. The lead screw converts the rotational motion into a linear motion to achieve the up and down displacement of the force measuring sensor.

[0035] In an embodiment of the present utility model, a middle layer support plate (22) is provided in the middle of the support frame (2). A guiding installation cylinder (6) is provided inside the middle layer support plate (22). The lead screw nut (7) is slidably arranged inside the guiding installation cylinder (6). The guiding installation cylinder (6) is provided with guiding sliders, and corresponding guiding grooves (61) are provided on the outer wall of the lead screw nut (7). The guiding installation cylinder (6) is snapped into the middle layer support plate (22), and the lead screw nut (7) slides inside the installation cylinder (6), playing a role of guiding and installation.

[0036] In an embodiment of the present utility model, a top layer installation plate (21) is provided at the top of the support frame (2). A control box (15) is provided above the top layer installation plate (21). The controller (17) and the driving device (9) are installed inside the control box (15). Control buttons (11) are provided on the outer side of the control box (15). The control buttons are connected to the controller. After pressing the control buttons, the controller performs corresponding actions. As Figure 2 shown, the control buttons include: an up button 11B, a down button 11A, a stop button 11C, and an emergency stop button 11D. The up button 11B and the down button 11A control the up and down movement of the device. The stop button (11C) can cut off the power when there are problems during the downward movement of the device during measurement. The emergency stop button (11D) can cut off the power in time when there are emergency problems during the device test.

[0037] Wherein, a display screen (10) is provided on the outer side of the control box (15). The display screen (10) is used to display the detection value of the force measuring sensor (5). The force measuring sensor can be connected to the controller, receive the detection signal of the force measuring sensor, and then send the corresponding test value to the display screen for display, so as to visually display the closing holding force.

[0038] In an embodiment of the present utility model, a pressure plate (4) is provided at the bottom of the force measuring sensor (5). The pressure plate (4) applies pressure to the opening link (2) during the downward movement. The pressure plate (4) can be made of aluminum plate to increase the pressure surface and ensure the downward pressure effect.

[0039] The usage method of the present utility model is as follows:

[0040] As Figure 4As shown, when the up button 11B is pressed, the stepping motor starts and begins to rotate in reverse, driving the lead screw 8 to rotate in reverse. Due to the thread mating relationship, the lead screw nut 7 rises, driving the aluminum plate and the force sensor to start rising. A limit toggle plate 12 is installed on the lead screw nut 7. When the limit toggle plate 12 rises to the position as shown in Figure 2 the limit toggle plate 12 touches the upper limit switch 14A. At this time, the controller controls the motor to cut off the power, the stepping motor stops rotating in reverse, and other components stop rising. It is installed in the support frame (2) in the closing state of the permanent magnet actuator and connected to the opening link. The opening link is placed directly below the aluminum plate at the position as shown in the figure, and then the test starts.

[0041] As shown in Figure 5 when the down button 11A is pressed, the stepping motor starts and begins to rotate forward, driving the lead screw 8 to rotate forward. Due to the thread mating relationship, the lead screw nut 7 descends, driving the aluminum plate and the force sensor to start descending. The aluminum plate contacts the opening link and presses down, and the force sensor transmits the received pressure to the display screen for display. When it descends to a certain extent, the permanent magnet actuator reaches the limit and instantaneously opens. The maximum pressure at this time is the closing holding force. A limit toggle plate 12 is installed on the lead screw nut 7. When the limit toggle plate 12 descends to the position as shown in Figure 3 the limit toggle plate 12 touches the lower limit switch 14B. At this time, the controller controls the motor to cut off the power, the stepping motor stops rotating forward, and other components stop descending, and the test is completed.

[0042] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A holding force detection system for a permanent magnet operating mechanism of a circuit breaker, characterized in that Comprising: A support frame (2), a driving device (9), a lifting mechanism, a force measuring sensor (5) and a tripping link (3). The driving device (9) is installed at the top of the support frame (2). The output shaft of the driving device (9) is connected to the lifting mechanism. The bottom of the lifting mechanism is connected to the top of the force measuring sensor (5). The bottom of the force measuring sensor (5) applies pressure to the tripping link (3). A permanent magnet operating mechanism (1) is installed on the bottom mounting plate (23) of the support frame (2). The tripping link (3) is connected to the permanent magnet operating mechanism (1); The driving device (9) is used to drive the lifting mechanism. The lifting mechanism is used to drive the tripping link (3) to move up and down, thereby changing the opening and closing states of the permanent magnet operating mechanism (1). The force measuring sensor (5) is used to detect the closing holding force of the permanent magnet operating mechanism (1).

2. The holding force detection system of the permanent magnet operating mechanism of the circuit breaker according to claim 1, characterized in that, Further comprising: A controller (17) and a displacement detection mechanism (16). The controller (17) is respectively connected to the displacement detection mechanism (16) and the driving device (9); The displacement detection mechanism (16) is installed on one side of the lifting mechanism. The displacement detection mechanism (16) is used to detect the displacement of the lifting mechanism and generate a displacement detection signal. The controller (17) controls the start and stop of the driving device (9) according to the displacement detection signal.

3. The holding force detection system for the permanent magnet operating mechanism of the circuit breaker according to claim 2, wherein The displacement detection mechanism (16) includes a limit toggle plate (12), a limit fixing plate (13) and a limit switch (14). The limit fixing plate (13) is connected to the support frame (2) and is arranged on one side of the lifting mechanism. The limit switch (14) is installed on the limit fixing plate (13). One end of the limit toggle plate (12) is connected to the lifting mechanism, and the other end is close to the limit switch (14). The limit toggle plate (12) moves up and down under the drive of the lifting mechanism. The limit switch (14) detects the displacement of the limit toggle plate (12) and generates the displacement detection signal.

4. The holding force detection system for the permanent magnet actuator of the circuit breaker according to claim 3, characterized in that, The lifting mechanism includes a lead screw (8) and a lead screw nut (7). The lead screw (8) is connected to the output shaft of the driving device (9). The lead screw nut (7) is threadedly connected to the lead screw (8). The top of the lead screw nut (7) is connected to the limit toggle plate (12). The bottom of the lead screw nut (7) is connected to the force measuring sensor (5).

5. The holding force detection system for the permanent magnet actuator of the circuit breaker according to claim 4, characterized in that A middle layer support plate (22) is arranged in the middle of the support frame (2). A guiding installation cylinder (6) is arranged inside the middle layer support plate (22). The lead screw nut (7) is slidably arranged inside the guiding installation cylinder (6). The guiding installation cylinder (6) is provided with guiding sliders. Corresponding guiding grooves (61) are arranged on the outer wall of the lead screw nut (7).

6. The holding force detection system for the permanent magnet operating mechanism of the circuit breaker according to claim 2, wherein A top layer mounting plate (21) is arranged at the top of the support frame (2). A control box (15) is arranged above the top layer mounting plate (21). The controller (17) and the driving device (9) are installed inside the control box (15).

7. The holding force detection system for the permanent magnet actuator of the circuit breaker according to claim 6, characterized in that, Control buttons (11) are arranged on the outer side of the control box (15).

8. The holding force detection system of the permanent magnet operating mechanism of the circuit breaker according to claim 6, characterized in that, A display screen (10) is provided on the outside of the control box (15), and the display screen (10) is used to display the detection value of the force measuring sensor (5).

9. The holding force detection system of the permanent magnet operating mechanism of the circuit breaker according to claim 1, characterized in that, A pressure plate (4) is provided at the bottom of the force measuring sensor (5), and the pressure plate (4) applies pressure to the opening link (3) during the descending process.

10. The holding force detection system for the permanent magnet operating mechanism of the circuit breaker according to claim 1, characterized in that, The driving device (9) is a stepper motor.

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