Residual current operated circuit breaker test detection device and method

Abstract

The invention discloses a residual current operated circuit breaker test detection device and method, the device comprises an action execution device, a reciprocating driving mechanism and a state monitoring module, a direct current driving motor of the reciprocating driving mechanism is arranged in the action execution device, and the direct current driving motor is connected with a planetary gear speed reducer; the center of an output gear of the planetary gear reducer is provided with an output rod in a limiting mode in a sliding mode in the axial direction of the output gear, the output end of the output rod and the end face of the planetary gear reducer are connected with a thrust spring, the output end of the output rod is connected with an operating rod to rotate, and the operating rod is provided with an operating bit and a state monitoring module. According to the device, through cooperation of the output gear of the planetary gear reducer, the thrust spring and the output rod, forward thrust is given to the operation bit, so that the operation bit is tightly attached to the operation hole, and it is ensured that the operation bit cannot be thrown out of the operation hole due to the influence of centrifugal force; the state monitoring module monitors the opening and closing states of the circuit breaker through electric signals, thereby guaranteeing the test precision.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a residual current operated circuit breaker test detection device and method. Background Art

[0002] Residual current operated circuit breakers are mechanical switchgear used to connect, carry and disconnect current under normal working conditions, and disconnect contacts when the residual current reaches a specified value under specified conditions. They are widely used in low-voltage complete switchgear. The purpose of the mechanical operation test of residual current operated circuit breakers is to check their operating performance under specified operating conditions and the reliability of opening and closing.

[0003] According to relevant regulations, after the complete set of equipment is installed, the mechanical operation of the circuit breaker should be verified to be good, and the number of operation cycles should be 200. However, the current way of mechanical operation test of residual current operated circuit breakers in low-voltage complete sets of equipment is mostly done by manual operation, which is not only time-consuming and laborious, but also prone to inaccurate test results due to different test operation levels.

[0004] Therefore, there is an urgent need for a residual current operated circuit breaker test detection device and method to solve the problem of inconvenience in residual current operated circuit breaker test detection. Summary of the invention

[0005] The present invention aims at the deficiencies in the prior art and provides a residual current operated circuit breaker test detection device and method to solve the problem of inconvenience in residual current operated circuit breaker test detection.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A residual current operated circuit breaker test and detection device, characterized in that it includes an action execution device, a reciprocating drive mechanism and a state monitoring module, the reciprocating drive mechanism and the state monitoring module are both installed on the action execution device, the reciprocating drive mechanism includes a DC drive motor, a planetary gear reducer, a thrust spring, an operating rod and an operating bit, the DC drive motor is arranged inside the action execution device, the DC drive motor is used to connect and drive the planetary gear reducer, the center of the output gear of the planetary gear reducer can be slidably limited along the axial direction of the output gear to be provided with an output rod, the output gear can drive the output rod to rotate, a thrust spring is connected between the output end of the output rod and the end face close to the planetary gear reducer, the output end of the output rod is used to connect and drive the operating rod to rotate, the output end of the operating rod extends out of the action execution device and is installed with an operating bit, and the state monitoring module is used to connect and identify the opening and closing state of the circuit breaker.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] Furthermore, the reciprocating drive mechanism also includes a universal connecting rod, the output end of the output rod is connected to the universal connecting rod, the universal connecting rod can be telescopically and rotatably extended out of the action execution device, and the extended end of the universal connecting rod is hinged to the end of the operating rod.

[0010] Furthermore, the maximum rotation angle of the operating rod around the hinge with the universal connecting rod is 10°.

[0011] Furthermore, the maximum range in which the output rod can slide forward and backward along the axis of the output gear is 1.5 cm.

[0012] Furthermore, the status monitoring module includes a battery, an analog communication module, two test wires and a test wire clamp, the battery is respectively connected to the analog communication module and the two test wires, the battery and the analog communication module are both arranged inside the action execution device, the ends of the two test wires extend out of the action execution device through the outlet terminals arranged on the action execution device, and are respectively connected to a test wire clamp, and the two test wire clamps are used to respectively clamp the residual current operated circuit breaker inlet terminal and the residual current operated circuit breaker outlet terminal of the residual current operated circuit breaker sample.

[0013] Furthermore, it also includes a screw transmission mechanism, the output surface at the front end of the action execution device is an opening, and symmetrically arranged vertical sliding tracks are provided on the left and right sides of the inner cavity of the action execution device. The DC drive motor and the planetary gear reducer of the reciprocating drive mechanism are fixedly connected to the sliding plate and are slidably installed in the sliding track through the sliding plate. The end surface of the sliding plate located at the front end of the planetary gear reducer is provided with an opening that allows the output end of the operating rod to extend and rotate forward and backward, and the screw transmission mechanism is installed inside the action execution device, and is used to drive the sliding plate to slide up and down along the sliding track.

[0014] Furthermore, the screw transmission mechanism includes a smooth belt, an electric screw lifting motor, a driving wheel, a transmission wheel, a lifting screw, a screw transmission part and a connecting plate. The electric screw lifting motor is installed inside the action execution device. The lifting screw is vertically and rotatably arranged inside the action execution device. The output end of the electric screw lifting motor is connected to the driving wheel, and the end on the same side of the lifting screw is connected to the transmission wheel. The driving wheel and the transmission wheel are connected through a smooth belt transmission. A screw transmission part is threadedly connected to the lifting screw, and the screw transmission part is fixedly connected to the sliding plate through a connecting plate.

[0015] Furthermore, the reciprocating drive mechanism also includes a laser alignment device, and the laser alignment device is also installed on the end face of the sliding plate located at the front end of the planetary gear reducer, and the laser alignment device is used to locate the use position of the operating bit.

[0016] Furthermore, it also includes a dust curtain. At the opening of the output surface of the action execution device, retractable and foldable dust curtains are slidably arranged on the upper and lower sides of the front end surface of the sliding plate.

[0017] Furthermore, a method for using a residual current operated circuit breaker test detection device comprises the following steps:

[0018] Before the test begins, first move the action execution device to the front of the residual current operated circuit breaker sample, dock and match the operating screwdriver with the operating hole of the residual current operated circuit breaker, connect the status monitoring module to the input and output terminals of the residual current operated circuit breaker sample, and complete the overall installation and commissioning. The status monitoring module is in the power-on state, which is used to identify and monitor the opening and closing states of the residual current operated circuit breaker sample through electrical signals;

[0019] Start the DC drive motor, and the operating head starts to rotate to drive the residual current operated circuit breaker sample to close. The state monitoring module gives a DC voltage and calculates the voltage difference between the inlet and outlet terminals of the residual current operated circuit breaker sample. If the voltage difference is zero, that is, the circuit breaker is "powered on" and the closing is successful, the operating head continues to rotate. If the voltage difference is not zero, the circuit breaker is not "powered on", the closing fails, and the failure counting action is recorded; after the preset power-on time is reached, the operating head rotates to drive the circuit breaker to open. The state monitoring module gives a DC voltage and calculates the voltage difference between the inlet and outlet terminals of the residual current operated circuit breaker sample. If the voltage difference is not zero, the circuit breaker is not "powered on", the opening is successful, the operation times are increased, and it is determined whether the preset times are reached. If the voltage difference is zero, the opening fails, and the failure counting action is recorded. If the number of successful operations does not reach the preset times, it returns to the "closing action" step and repeats the test procedure.

[0020] If the number of successful operations reaches the preset number, the test ends.

[0021] The beneficial effects of the present invention are:

[0022] The device of the present invention is used for connecting and continuously rotating the operating switch of a residual current operated circuit breaker sample, namely, the operating hole of the residual current operated circuit breaker, to test the number of continuous opening and closing operations of the residual current operated circuit breaker sample; through the coordinated arrangement of the output gear, thrust spring and output rod of the planetary gear reducer, a forward thrust can be given to the operating bit when in use, so that the operating bit is closely attached to the operating hole of the residual current operated circuit breaker, ensuring that the operating bit will not be thrown out of the operating hole due to the influence of centrifugal force during the rotation operation; the DC drive motor of the reciprocating drive mechanism drives the operating rod and the operating bit to reciprocate, thereby continuously opening and closing operations are performed on the residual current operated circuit breaker, and the planetary gear reducer can realize the installation and control of the output rod while playing the role of increasing torque and speed control; through the connection of the state monitoring module with the residual current operated circuit breaker sample, the circuit breaker opening and closing state is monitored by using electrical signals, and no manual intervention is required throughout the test, effectively ensuring the test accuracy.

[0023] The device of the present invention controls the rotation of the operating lever through a DC drive motor to continuously mechanically operate the circuit breaker. Compared with the traditional manual operation test method, the test automation and convenience are greatly improved; through the setting of the screw transmission mechanism, the use position of the operating lever can be flexibly adjusted to adapt to different heights of the operating holes of residual current circuit breakers; through the use of the status monitoring module, the circuit breaker opening and closing states are judged by electrical signals, without the need for manual observation of the circuit breaker panel indication, and it is more accurate and reliable than the traditional method of recording the number of rotations to judge the number of tests.

[0024] The device of the present invention can realize the automatic test of mechanical operation of residual current operated circuit breaker, and has the advantages of high efficiency, high test accuracy, saving labor cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0026] Figure 2 A schematic diagram of the structure of a screw transmission mechanism of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0027] Figure 3 A schematic structural diagram of a reciprocating drive mechanism of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0028] Figure 4 A schematic diagram of the use of a state monitoring module of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the external structure of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0030] Figure 6 A schematic diagram of a handheld control terminal of a residual current operated circuit breaker test and detection device proposed by the present invention;

[0031] Figure 7 The present invention provides a schematic diagram of a method flow of a residual current operated circuit breaker test detection device.

[0032] Reference numerals: 1. Action execution device, 11. Universal caster, 12. Rubber friction plate, 13. Moving handle, 14. Carrying handle, 15. Emergency stop button, 16. Dust curtain, 17. Inspection door, 18. Battery, 2. Handheld control terminal, 3. Screw transmission mechanism, 311. Up button, 312. Down button, 32. Smooth belt, 33. Electric screw lifting motor, 34. Driving wheel, 35. Driving wheel, 36. Sliding track, 37. Lifting screw, 38. Screw transmission part, 39. Connecting plate, 4. Status monitoring Module, 41. Battery, 42. Analog communication module, 43. Test line, 44. Test line clamp, 45. Outlet, 5. Reciprocating drive mechanism, 51. Speed ​​knob, 52. DC drive motor, 53. Planetary gear reducer, 54. Thrust spring, 55. Universal connecting rod, 56. Operating lever, 57. Operating bit, 58. Laser alignment device, 6. Residual current operated circuit breaker sample, 61. Residual current operated circuit breaker operating hole, 62. Residual current operated circuit breaker inlet, 63. Residual current operated circuit breaker outlet. DETAILED DESCRIPTION

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] As attached Figure 1 and attached Figure 3 As shown, a residual current operated circuit breaker test detection device according to an embodiment of the present invention includes an action execution device 1, a reciprocating drive mechanism 5 and a state monitoring module 4. The reciprocating drive mechanism 5 and the state monitoring module 4 are both installed on the action execution device 1. The reciprocating drive mechanism 5 includes a DC drive motor 52, a planetary gear reducer 53, a thrust spring 54, an operating rod 56 and an operating bit 57. The DC drive motor 52 is arranged inside the action execution device 1. The DC drive motor 52 is used to connect and drive the planetary gear reducer 53. The center of the output gear of the planetary gear reducer 53 can be provided with an output rod axially slidably and limitedly along the output gear. The output gear can drive the output rod to rotate. A thrust spring 54 is connected between the output end of the output rod and the end face close to the planetary gear reducer 53. The output end of the output rod is used to connect and drive the operating rod 56 to rotate. The output end of the operating rod 56 can rotatably extend out of the action execution device 1 and is installed with an operating bit 57. The state monitoring module 4 is used to connect and identify the opening and closing state of the circuit breaker.

[0035] The device of the present invention is used to connect and continuously rotate the operating switch of the residual current operated circuit breaker sample 6, that is, the residual current operated circuit breaker operating hole 61, to test the number of continuous opening and closing operations of the residual current operated circuit breaker sample 6; through the coordinated arrangement of the output gear of the planetary gear reducer 53, the thrust spring 54 and the output rod, when in use, a forward thrust can be given to the operating screwdriver 57, so that the operating screwdriver 57 is closely attached to the operating hole 61 of the residual current operated circuit breaker, ensuring that the operating screwdriver 57 will not be thrown out of the operating hole due to the influence of centrifugal force during the rotation operation. , wherein the thrust range is 1.5kgf to 4.5kgf; the DC drive motor 52 of the reciprocating drive mechanism 5 drives the operating rod 56 and the operating bit 57 to reciprocate, thereby continuously opening and closing the residual current operated circuit breaker 6, and the planetary gear reducer 53 can realize the installation and control of the output rod while increasing the torque and speed control; through the connection between the state monitoring module 4 and the residual current operated circuit breaker sample 6, the circuit breaker opening and closing state is monitored by electrical signals, and no manual intervention is required throughout the test, which effectively ensures the test accuracy.

[0036] A method of using the present invention is as follows:

[0037] Before the test begins, first move the action execution device 1 to the front of the residual current operated circuit breaker sample 6, dock and match the operating screwdriver 57 with the residual current operated circuit breaker operating hole 61, connect the state monitoring module 4 to the input and output terminals of the residual current operated circuit breaker sample 6, and complete the overall installation and commissioning. The state monitoring module 4 is in the power-on state, and is used to identify and monitor the opening and closing states of the residual current operated circuit breaker sample 6 through electrical signals;

[0038] Start the DC drive motor 52, operate the screwdriver 57 to start rotating to drive the residual current operated circuit breaker sample 6 to close, the state monitoring module 4 gives a DC voltage, and calculates the voltage difference between the input and output terminals of the residual current operated circuit breaker sample 6. If the voltage difference is zero, that is, the circuit breaker has been "powered on" and the closing is successful, the screwdriver 57 continues to rotate. If the voltage difference is not zero, the circuit breaker is not "powered on", the closing fails, and the failure counting action is recorded; after the preset power-on time is reached, the screwdriver rotates to drive the circuit breaker to open, the state monitoring module 4 gives a DC voltage, and calculates the voltage difference between the input and output terminals of the residual current operated circuit breaker sample 6. If the voltage difference is not zero, the circuit breaker is not "powered on", the opening is successful, the operation times are increased by 1, and it is determined whether the preset times are reached. If the voltage difference is zero, the opening fails, and the failure counting action is recorded. If the number of successful operations does not reach the preset times, it returns to the "closing action" step and repeats the test procedure;

[0039] If the number of successful operations reaches the preset number, the test ends.

[0040] In the above embodiment, the operating screwdriver 57 can be hexagonal, inserted into the operating hole 61 of the residual current operated circuit breaker, matched and fixed therewith, and drives the operating hole 61 of the residual current operated circuit breaker to rotate to perform the opening and closing operations on the residual current operated circuit breaker. In this embodiment, the height of the action execution device 1 is about 800mm, wherein the operating rod 56 serves to extend and fix the operating screwdriver 57.

[0041] In another specific embodiment, the reciprocating drive mechanism 5 further includes a universal connecting rod 55, the output end of the output rod is connected to the universal connecting rod 55, the universal connecting rod 55 can be extended out of the action execution device 1 in a telescopic and rotatable manner, and the extended end of the universal connecting rod 55 is hinged to the end of the operating rod 56. The universal connecting rod 55 plays a role in fine-tuning the position of the operating rod 56, so as to facilitate the operation of the screwdriver 57 to quickly dock with the operating hole 61 of the residual current operated circuit breaker.

[0042] The maximum rotation angle of the operating rod 56 around the hinge with the universal connecting rod 55 is 10°, that is, the maximum angle of fine adjustment is 10°.

[0043] The maximum range in which the output rod can slide forward and backward along the axial direction of the output gear is 1.5 cm, that is, the maximum compression depth of the thrust spring 54 is 1.5 cm.

[0044] As attached Figure 4 As shown, in another specific embodiment, the state monitoring module 4 includes a 12V battery 41, an analog communication module 42, two test wires 43 and a test wire clamp 44. The battery 41 is connected in series with the analog communication module 42 and the two test wires 43 respectively. The battery 41 and the analog communication module 42 are both arranged inside the action execution device 1. The ends of the two test wires 43 extend out of the action execution device 1 through the outlet terminal 45 arranged on the action execution device 1, and are respectively connected to a test wire clamp 44. The two test wire clamps 44 are used to respectively clamp the residual current operated circuit breaker inlet terminal 62 and the residual current operated circuit breaker outlet terminal 63 connected to the residual current operated circuit breaker sample 6.

[0045] The state monitoring module 4 is composed of a stable 12V DC power supply, an analog communication module 42 and a test line 43 in series. Two test line clamps 44 are respectively clamped on the residual current operated circuit breaker inlet terminal 62 and the residual current operated circuit breaker outlet terminal 63 of the residual current operated circuit breaker sample 6. After each action is completed, the analog communication module 42 collects a conduction signal and transmits it to the handheld control terminal in real time to record the number of tests.

[0046] When in use, when the action execution device 1 moves to the specified position and completes the docking, the test wire clamp 44 is clamped at the residual current operated circuit breaker inlet terminal 62 and the residual current operated circuit breaker outlet terminal 63 respectively. Its working principle is: the battery 41 outputs voltage, and each operation action is completed. The analog communication module 42 collects the voltage difference between the two ends of the residual current operated circuit breaker sample 6. The voltage difference is 0, that is, the circuit breaker state is "closed", and the voltage difference is 12V, that is, the circuit breaker state is "opened", and the circuit breaker state can be transmitted to the external terminal in real time. Compared with the traditional method of recording the number of rotations, observing the opening and closing display window, etc., this method can effectively identify the "idling" of the circuit breaker, and record the number of tests more accurately and reliably.

[0047] As attached Figure 2 As shown, in another specific embodiment, it also includes a screw transmission mechanism 3, the output surface at the front end of the action execution device 1 is an opening, and the left and right sides of the inner cavity of the action execution device 1 are provided with symmetrically arranged vertical sliding tracks 36, the DC drive motor 52 and the planetary gear reducer 53 of the reciprocating drive mechanism 5 are fixedly connected to the sliding plate, and are slidably installed in the sliding track 36 through the sliding plate, and the sliding plate is located on the end surface of the front end of the planetary gear reducer 53. An opening is provided on the end surface of the sliding plate that is located at the front end of the planetary gear reducer 53, and the output end of the operating rod 56 can be extended and rotated forward and backward. The screw transmission mechanism 3 is installed inside the action execution device 1, and is used to drive the sliding plate to slide up and down along the sliding track 36.

[0048] Among them, in a further embodiment, the screw transmission mechanism 3 includes a smooth belt 32, an electric screw lifting motor 33, a driving wheel 34, a transmission wheel 35, a lifting screw 37, a screw transmission member 38 and a connecting plate 39. The electric screw lifting motor 33 is installed inside the action execution device 1, and the lifting screw 37 is vertically and rotatably arranged inside the action execution device 1. The output end of the electric screw lifting motor 33 is connected to the driving wheel 34, and the end on the same side of the lifting screw 37 is connected to the transmission wheel 35. The driving wheel 34 and the transmission wheel 35 are connected by the smooth belt 32. The lifting screw 37 is threaded with a screw transmission member 38, and the screw transmission member 38 is fixedly connected to the sliding plate through the connecting plate 39. In this way, the driving wheel 34 is driven to rotate by the electric screw lifting motor 33, and the smooth belt 32 is used to drive the transmission wheel 35 to rotate, and the transmission wheel 35 drives the lifting screw 37 to rotate, thereby changing the up and down positions of the screw transmission member 38 to achieve the up and down drive adjustment of the sliding plate and other structures, thereby adapting to the height of the residual current operated circuit breaker operating hole 61 of different heights.

[0049] In a further embodiment, the reciprocating drive mechanism 5 further includes a laser alignment device 58, and the end surface of the sliding plate located at the front end of the planetary gear reducer 53 is also equipped with a laser alignment device 58, and the laser alignment device 58 is used to locate the use position of the operating bit 57. In this way, the cross-shaped light beam emitted by the laser alignment device 58 is used to guide the operating bit 57 to center.

[0050] In a further embodiment, a dust curtain 16 is further included, and a retractable and foldable dust curtain 16 is slidably provided at the opening of the output surface of the action execution device 1 and at the upper and lower sides of the front end surface of the sliding plate, respectively, to prevent dust from entering the interior of the device and affecting the smooth operation of each mechanism.

[0051] As attached Figure 5 As shown, in another specific embodiment, a universal caster 11 with a lockable rubber friction pad 12 can also be provided at the bottom of the action execution device 1 to facilitate the movement and locking of the device. Specifically, four independent universal casters 11 are installed at the bottom of the action execution device 1, so that the action execution device 1 can be moved in any direction. After the operating bit 57 is inserted into the operating hole 61 of the residual current operated circuit breaker, its rotation is limited by the rubber brake pad 12, and the action execution device 1 is fixed at the corresponding position by means of the friction between the universal caster 11 and the ground.

[0052] In another specific embodiment, a moving handle 13 located at the top of the action execution device 1 can be provided for moving on the ground, and a carrying handle 14 located at the side can be provided for easy carrying of the action execution device; an inspection door 17 can also be provided on the side wall of the action execution device 1 to facilitate the staff to inspect its internal structure; an emergency stop button 15 for controlling the DC drive motor 52 to stop rotating in an emergency, a speed knob 51 for controlling the current size of the DC drive motor 52 to control the speed, and an up button 311 and a down button 312 for controlling the rotation direction of the electric screw lifting motor 33 to control the up and down movement of the sliding plate and other structures can also be provided on the top of the action execution device 1 to facilitate the operator to perform control operations. At the same time, a battery 18 for powering the above-mentioned electrical equipment is also provided inside the action execution device 1. Specifically, the battery 18 is a lead-acid battery with a voltage of 12V and a capacity of 25Ah, which can support a full-charge operation time of not less than 8 hours.

[0053] As attached Figure 6 As shown, in another specific embodiment, an external handheld control terminal 2 may be provided, and the handheld control terminal 2 is electrically connected to the driving structure of the action execution device 1 via Bluetooth for communication and sending instructions.

[0054] In this embodiment, the handheld control terminal 2 has a built-in programmable touch screen, the operation times can be set to 1 to 999 times, the operation duration can be set to 10 to 99999 seconds, the data record is not less than 99 groups of data, the touch screen and button switch combination mode is adopted, the operation mode is touch, and it has overload alarm, idling alarm, and other abnormal alarm functions. The panel of the handheld control terminal 2 can be equipped with a power button and a status display light.

[0055] Among them, the overload alarm function is to monitor the motor current size, and the overload alarm is performed when the current exceeds the set value, indicating that the torque is too large. For example, when the motor current is greater than 3A, an alarm signal is issued to remind the test personnel to check whether the circuit breaker is blocked or stuck. Specifically, the reference motor rotation torque is proportional to the working current of the motor. The formula is T=Kt*I, where T is the motor torque, I is the current, and Kt is the proportional coefficient. The preset upper limit of the motor working current is 3A. If the working current exceeds 3A, it is judged that the circuit breaker is blocked or stuck, and an overload alarm is issued; the idling alarm is that the signal of successful opening and closing is not received within a fixed time. For example, when the handheld control terminal 2 does not receive the successful opening and closing signal within 3s, an alarm signal is issued to remind the test personnel to check whether the test line 43 of the status monitoring device is detached, whether the operating screw head 57 is separated from the operating hole, and whether the opening and closing operation of the tested circuit breaker is invalid. Other abnormal alarms are self-state alarms, including low power alarms and communication abnormal alarms. The intelligent control module has a built-in test logic judgment program, which can set and record the number of operations and determine the test results. If the preset number of times is not reached, the action execution device continues to control the motor to rotate. If the preset number of times is reached, the test end whistle and signal light flash to indicate the end of the test; the action execution device can be controlled to complete the rotation operation, and an abnormal test alarm can be issued to complete the full process control of the test.

[0056] The handheld control terminal 2 can execute start, stop, emergency stop and other commands through the set buttons, communicate with the action execution device through Bluetooth, set the number of operations, control the action execution device to complete the rotation operation, is equipped with a high-performance battery, can be disconnected from the AC power supply for testing, and has the functions of process control, data management, data upload, etc.

[0057] This test device fully meets the requirements of GB / T 7251.1-2023 and Q / GDW 11221-2023 for mechanical operation test of residual current operated circuit breakers in complete switchgear. It can automatically test residual current operated circuit breakers of different specifications, automatically count and judge the opening and closing status, and automatically complete the mechanical operation test after one-key setting, which greatly improves the degree of test automation and has the advantages of high efficiency, high test accuracy, and saving labor costs.

[0058] As attached Figure 7 As shown, a specific implementation of the device of the present invention is as follows:

[0059] Before the test begins, first move the action execution device 1 to the front of the residual current operated circuit breaker sample 6, press the up button 311 and the down button 312 to match the operating bit 57 with the residual current operated circuit breaker operating hole 61, and clamp the test wire clamp 44 at the residual current operated circuit breaker input and output terminals to complete the overall installation and debugging;

[0060] The number of mechanical operation tests can be set on the handheld control terminal 2 as needed, and preset parameters such as the upper limit alarm of the rotating motor current can be confirmed at the same time;

[0061] Press the start button, the operating head 57 starts to rotate 360 ​​degrees clockwise, driving the residual current operated circuit breaker to close, the state monitoring module 4 gives a DC voltage, and calculates the voltage difference between the inlet and outlet terminals of the circuit breaker. If the voltage difference is zero, that is, the circuit breaker is "powered on", the closing is successful, and the operating head 57 continues to rotate. If the voltage difference is not zero, the circuit breaker is not "powered on", the closing fails, and the failure counting action is recorded. The power-on time is 1s. After the power-on time is reached, the operating head rotates 180 degrees, driving the circuit breaker to open, the state monitoring module 4 gives a DC voltage, and calculates the voltage difference between the inlet and outlet terminals of the circuit breaker. If the voltage difference is not zero, the circuit breaker is not "powered on", the opening is successful, the number of operations is increased by 1, and it is determined whether the preset number is reached. If the voltage difference is zero, the opening fails, and the failure counting action is recorded. If the number of successful operations does not reach the preset number, return to the "closing action" step and repeat the test procedure. If the number of successful operations reaches the preset number, the test end alarm will be issued and the test end signal light will flash.

[0062] The device of the present invention controls the rotation of the operating rod 56 through the DC drive motor 52 to continuously mechanically operate the circuit breaker. Compared with the traditional manual operation test method, the test automation and convenience are greatly improved; through the setting of the screw transmission mechanism 3, the use position of the operating rod 56 can be flexibly adjusted to adapt to different heights of the operating holes of the residual current circuit breakers; through the use of the status monitoring module 4, the circuit breaker opening and closing states are judged by electrical signals, without the need for manual observation of the circuit breaker panel indication, and it is more accurate and reliable than the traditional method of recording the number of rotations to judge the number of tests.

[0063] The device of the present invention can realize the automatic test of mechanical operation of residual current operated circuit breaker, and has the advantages of high efficiency, high test accuracy, saving labor cost, etc.

[0064] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0065] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A residual current operated circuit breaker test detection device, characterized in that: The invention comprises an action execution device (1), a reciprocating drive mechanism (5) and a state monitoring module (4), wherein the reciprocating drive mechanism (5) and the state monitoring module (4) are both mounted on the action execution device (1), the reciprocating drive mechanism (5) comprises a DC drive motor (52), a planetary gear reducer (53), a thrust spring (54), an operating rod (56) and an operating bit (57), the DC drive motor (52) is arranged inside the action execution device (1), and the DC drive motor (52) is used to connect to and drive the planetary gear reducer (53). The center of the output gear of the planetary gear reducer (53) is provided with an output rod which can be slidably limited along the axial direction of the output gear, and the output gear can drive the output rod to rotate. A thrust spring (54) is connected between the output end of the output rod and the end surface close to the planetary gear reducer (53). The output end of the output rod is used to connect and drive an operating rod (56) to rotate. The output end of the operating rod (56) extends out of the action execution device (1) and is equipped with an operating screwdriver (57). The state monitoring module (4) is used to connect and identify the opening and closing state of the circuit breaker.

2. A residual current operated circuit breaker test and detection device according to claim 1, characterized in that: The reciprocating drive mechanism (5) further comprises a universal connecting rod (55), the output end of the output rod being connected to the universal connecting rod (55), the universal connecting rod (55) being telescopically and rotatably extended out of the action execution device (1), and the extended end of the universal connecting rod (55) being hinged to the end of the operating rod (56).

3. A residual current operated circuit breaker test and detection device according to claim 2, characterized in that: The maximum rotation angle of the operating rod (56) around the hinge point with the universal connecting rod (55) is 10°.

4. A residual current operated circuit breaker test and detection device according to claim 1, characterized in that: The maximum range in which the output rod can slide forward and backward along the axial direction of the output gear is 1.5 cm.

5. A residual current operated circuit breaker test and detection device according to claim 1, characterized in that: The state monitoring module (4) comprises a battery (41), an analog communication module (42), two test wires (43) and a test wire clamp (44); the battery (41) is respectively connected to the analog communication module (42) and the two test wires (43); the battery (41) and the analog communication module (42) are both arranged inside the action execution device (1); the ends of the two test wires (43) extend out of the action execution device (1) through an outlet terminal (45) arranged on the action execution device (1) and are respectively connected to a test wire clamp (44); the two test wire clamps (44) are used to respectively clamp a residual current operated circuit breaker inlet terminal (62) and a residual current operated circuit breaker outlet terminal (63) connected to a residual current operated circuit breaker sample (6).

6. A residual current operated circuit breaker test and detection device according to claim 1, characterized in that: The invention also includes a screw transmission mechanism (3), wherein the output surface at the front end of the action execution device (1) is open, and symmetrically arranged vertical sliding tracks (36) are provided on the left and right sides of the inner cavity of the action execution device (1). The DC drive motor (52) and the planetary gear reducer (53) of the reciprocating drive mechanism (5) are fixedly connected to the sliding plate and are slidably installed in the sliding track (36) through the sliding plate. The sliding plate is provided with an opening on the end surface at the front end of the planetary gear reducer (53) for the output end of the operating rod (56) to be extended and rotated forward and backward. The screw transmission mechanism (3) is installed inside the action execution device (1) and is used to drive the sliding plate to slide up and down along the sliding track (36).

7. A residual current operated circuit breaker test and detection device according to claim 6, characterized in that: The screw transmission mechanism (3) comprises a smooth belt (32), an electric screw lifting motor (33), a driving wheel (34), a transmission wheel (35), a lifting screw (37), a screw transmission member (38) and a connecting plate (39). The electric screw lifting motor (33) is installed inside the action execution device (1). The lifting screw (37) is vertically and rotatably arranged inside the action execution device (1). The output end of the electric screw lifting motor (33) is connected to the driving wheel (34). The end on the same side of the lifting screw (37) is connected to the transmission wheel (35). The driving wheel (34) and the transmission wheel (35) are connected to each other through the smooth belt (32). The lifting screw (37) is threadedly connected with a screw transmission member (38). The screw transmission member (38) is fixedly connected to the sliding plate through a connecting plate (39).

8. A residual current operated circuit breaker test and detection device according to claim 6, characterized in that: The reciprocating drive mechanism (5) further comprises a laser alignment device (58), and the laser alignment device (58) is also mounted on the end surface of the sliding plate located at the front end of the planetary gear reducer (53). The laser alignment device (58) is used to locate the use position of the operating bit (57).

9. A residual current operated circuit breaker test and detection device according to claim 6, characterized in that: It also includes a dustproof curtain (16), and a retractable and foldable dustproof curtain (16) is slidably provided at the opening of the output surface of the action execution device (1) and at the upper and lower sides of the front end surface of the sliding plate.

10. A method for using the residual current operated circuit breaker test detection device according to any one of claims 1 to 9, comprising the following steps: Before the test begins, the action execution device (1) is first moved to the front of the residual current operated circuit breaker sample (6), the operating screwdriver (57) is docked and matched with the residual current operated circuit breaker operating hole (61), and the state monitoring module (4) is connected to the input and output terminals of the residual current operated circuit breaker sample (6) to complete the overall installation and commissioning. The state monitoring module (4) is in a powered-on state and is used to identify and monitor the opening and closing states of the residual current operated circuit breaker sample (6) through electrical signals; The DC drive motor (52) is started, and the operating head (57) starts to rotate to drive the residual current operated circuit breaker sample (6) to close. The state monitoring module (4) provides a DC voltage and calculates the voltage difference between the input and output terminals of the residual current operated circuit breaker sample (6). If the voltage difference is zero, that is, the circuit breaker is "powered on" and the closing is successful, the operating head (57) continues to rotate. If the voltage difference is not zero, the circuit breaker is not "powered on" and the closing fails, then the failure counting action is recorded; After the preset power-on time is reached, the operating screwdriver rotates to drive the circuit breaker to open, the state monitoring module (4) gives a DC voltage, and calculates the voltage difference between the input and output terminals of the residual current operated circuit breaker sample (6). If the voltage difference is not zero, the circuit breaker is not "powered on", the opening is successful, the operation number is increased (1), and it is determined whether the preset number is reached. If the voltage difference is zero, the opening fails, and the failure counting action is recorded. If the number of successful operations does not reach the preset number, it returns to the "closing action" step and repeats the test procedure; If the number of successful operations reaches the preset number, the test ends.

Images