Preventive test device for electrical equipment

Abstract

The invention relates to the technical field of preventive tests of electrical equipment, in particular to a preventive test device for the electrical equipment. Comprising a workbench; the supporting frame is arranged on the workbench; the fixed seat is fixedly connected to the support frame; the limiting frames are distributed in a mirror image manner and are mounted on the supporting frame; the first sliding frames are distributed in a mirror image mode and are connected to the supporting frame in a sliding mode; and the circuit breaking piece is mounted on one of the first sliding frames. In a preventive test, in order to prevent accidents caused by continuous voltage application due to the fact that the circuit breaker cannot be disconnected due to internal faults, an auxiliary circuit breaker is creatively added in the test equipment, the voltage bearing capacity of the auxiliary circuit breaker is larger than that of the circuit breaker to be tested, and when the circuit breaker to be tested is not disconnected in time, the auxiliary circuit breaker is actively powered off; serious accidents such as short circuit, fire and the like are avoided, the reliability and the safety of the test are improved, and a new solution is provided for factory test of power equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of preventive testing of electrical equipment, and in particular to a preventive testing device for electrical equipment. Background Art

[0002] Electrical equipment is an indispensable core component of the power system and is widely used in power generation, transmission, distribution, and consumption. These devices include transformers, circuit breakers, disconnectors, mutual inductors, lightning arresters, etc. Among them, circuit breakers are one of the most important control and protection devices in the power system, responsible for circuit connection, disconnection, and fault protection. Since the working status of circuit breakers directly affects the safety and reliability of the power system, factory testing of their performance is very important. Preventive testing, as a necessary process of factory testing, aims to further verify the performance parameters of circuit breakers and ensure that they reach the optimal state before formal commissioning, thereby providing a solid guarantee for the safe and stable operation of the power system.

[0003] In preventive testing, specialized test equipment is typically used to conduct comprehensive performance tests on circuit breakers. These devices include mechanical property testers, electrical property testers, and environmental adaptability testers. These devices automatically test key parameters such as the circuit breaker's opening and closing time, contact pressure, and breaking capacity. However, during actual testing, some problems may arise. For example, internal parts of the circuit breaker may become stuck, preventing it from quickly shutting off power when necessary. Furthermore, abnormalities in signal transmission within the control circuit can affect the normal operation of the circuit breaker. If these problems are not discovered and resolved in a timely manner, the test equipment may suffer varying degrees of damage due to overload or sensor damage, causing the test equipment to fail to operate normally and potentially leading to serious safety incidents. Summary of the Invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a preventive test device for electrical equipment.

[0005] The technical solution of the present invention is: a preventive test device for electrical equipment, comprising:

[0006] Workbench;

[0007] A support frame, arranged on the workbench;

[0008] A fixing seat, fixedly connected to the supporting frame;

[0009] The mirror-image-distributed limit frames are all installed on the support frame;

[0010] The mirror-image-distributed first sliding frames are all slidably connected to the support frame, the opposite sides of the mirror-image-distributed first sliding frames are fixedly connected to the first fixing frames, the opposite sides of the mirror-image-distributed first fixing frames are provided with protective shells, and the protective shells are fixedly connected to electrical connectors;

[0011] a circuit breaker mounted on one of the first sliding brackets, the circuit breaker being used to urgently disconnect the electrical connection of an adjacent object under test;

[0012] a resistance adjustment component, disposed on the first sliding frame containing the circuit breaker, and when the object under test needs to be tested, the resistance adjustment component connects the electrical connector to the adjacent circuit breaker and changes the input voltage of the circuit breaker according to different test requirements of the object under test;

[0013] A driving assembly is provided on the supporting frame and is used for driving the mirror-distributed first sliding frames to move simultaneously.

[0014] Furthermore, the resistance adjustment component includes:

[0015] A fixed shell is installed on the adjacent first sliding frame. The first sliding frame containing the fixed shell is fixedly connected to a conductive frame, and a plurality of resistors are fixedly connected to the conductive frame. The conductive frame is fixedly connected to a mirror-distributed conductive frame. The conductive frame away from the adjacent electrical connector is connected to the circuit breaker through a first wire. The conductive frame is fixedly connected to a conductive rod. The electrical connector is provided with a second wire. The conductive rod is electrically connected to the second wire of the adjacent electrical connector. The conductive rod is slidably and rotatably connected to a conductive sheet that contacts the resistor.

[0016] Furthermore, the conductive rod is slidably connected to a sliding block, the sliding block is slidably connected to the fixed shell, the sliding block is slidably and rotatably connected to the conductive rod, a first spring is provided between the sliding block and the conductive sheet, and a scale is provided on the fixed shell, and the scale is used to display the position of the sliding block.

[0017] Furthermore, the driving assembly includes:

[0018] The first driving member is fixed to the support frame, the mirror-distributed first sliding frames are all fixed to rack frames, and the driving shaft of the first driving member is fixed to gears meshing with the mirror-distributed rack frames.

[0019] Furthermore, the mirror-image distribution of the protective shells facing each other is slidably connected with a second sliding frame, a second spring is provided between the second sliding frame and the adjacent protective shell, and the second sliding frame is provided with two inclined surfaces.

[0020] Furthermore, it also includes:

[0021] The mirror-distributed linear displacement sensors are respectively fixed to the opposite sides of the mirror-distributed first sliding frames. The side of the linear displacement sensor away from the adjacent first sliding frame is fixed to the adjacent protective shell, and the protective shell is slidably connected to the adjacent first fixed frame.

[0022] Furthermore, it also includes:

[0023] The mirror-distributed test components are all arranged on the support frame, and the test components are used to test the screws on the object under test. The test components include:

[0024] The second fixing frame is fixed to the adjacent limiting frame, the second fixing frame is fixed with a second driving member, the driving shaft of the second driving member is spline-connected with a sliding rod, and the sliding rod on the driving shaft of the second driving member is provided with a rotating member.

[0025] Furthermore, a spring telescopic rod is fixedly connected to the sliding rod on the driving shaft of the second driving member, and the side of the spring telescopic rod away from the adjacent second driving member is connected to the rotating member for limited rotation.

[0026] Furthermore, the first fixing frame is fixedly connected to an extrusion frame, the extrusion frame is provided with a sliding groove, the extrusion frame is slidably connected to a guide frame sliding along the sliding groove therein, and the guide frame is rotationally connected to a sliding rod on the adjacent second driving member drive shaft.

[0027] Furthermore, the telescopic end of the spring telescopic rod is fixedly connected with evenly distributed spring pins, and the rotating member is provided with grooves for limiting adjacent spring pins.

[0028] Compared with the existing technology, the present invention has the following advantages: During preventive testing, to prevent accidents caused by the continued application of voltage due to a circuit breaker failing to disconnect due to an internal fault, this solution innovatively adds an auxiliary circuit breaker to the test equipment. Its voltage tolerance is greater than that of the circuit breaker under test. If the circuit breaker under test fails to disconnect in time, the auxiliary circuit breaker will immediately respond and actively cut off the power, ensuring test safety and avoiding serious accidents such as short circuits and fires. This improves the reliability and safety of the test while also providing a new solution for factory testing of power equipment.

[0029] When adjusting the resistance of the current according to different circuit breakers, the conductive sheet is first disengaged from the resistor through optimized adjustment, and then the position of the conductive sheet is moved, reducing the risk of contact failure or conductivity degradation caused by sliding the sheet, ensuring the reliability and accuracy of the test process;

[0030] When testing a circuit breaker, if the terminal is screwed in too deeply, the energized portion of the test equipment will not be effectively connected to the terminal, affecting the accuracy and reliability of the measurement, and even causing the test to fail. To solve this problem, the present invention adopts a pre-detection method to monitor the distance between the terminal and the energized portion of the test equipment in real time. If the distance changes, the system automatically adjusts the screw direction of the terminal to ensure that the energized portion of the test equipment is correctly connected, thereby completing the circuit breaker test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of another perspective of the three-dimensional structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the support frame and the fixing seat of the present invention;

[0034] Figure 4 Schematic diagram of the three-dimensional structure of the support frame and the first sliding frame of the present invention;

[0035] Figure 5 Schematic diagram of the three-dimensional structure of the first fixing frame and the protective shell of the present invention;

[0036] Figure 6 This is a schematic diagram of the three-dimensional structure of the protective shell and the second sliding frame of the present invention;

[0037] Figure 7 A schematic diagram of the three-dimensional structure of the limiting frame and the second fixing frame of the present invention;

[0038] Figure 8 It is a three-dimensional structural cross-sectional view of the rotating member of the present invention;

[0039] Figure 9 is a sectional view of the three-dimensional structure of the first sliding frame of the present invention;

[0040] Figure 10 This is a sectional view of the three-dimensional structure of the protective shell of the present invention;

[0041] Figure 11 It is a schematic diagram of the three-dimensional structure of the conductive sheet and the sliding block of the present invention.

[0042] Figure numbers: 1. workbench, 2. support frame, 3. fixed seat, 4. limit frame, 5. first sliding frame, 6. first fixed frame, 7. protective shell, 8. electrical connector, 9. circuit breaker, 10. fixed shell, 11. conductive frame, 12. resistor, 13. conductive frame, 14. conductive rod, 15. conductive sheet, 16. sliding block, 18. first driving member, 19. rack frame, 20. second sliding frame, 21. linear displacement sensor, 22. second fixed frame, 23. second driving member, 24. rotating member, 25. spring telescopic rod, 26. extrusion frame, 27. guide frame, 28. spring pin. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0044] During preventive testing, the performance and status of the circuit breaker are tested using a series of rigorous technical means and test equipment. However, during the test, if the circuit breaker fails to disconnect in time when power is required due to problems with internal components, voltage may continue to be applied to the equipment or circuit, resulting in excessive current or equipment overload. This situation not only damages the equipment but also threatens the safety of the test personnel. To address the above issues, this application adopts the method of adding an auxiliary circuit breaker to the test equipment. Its voltage tolerance is greater than that of the circuit breaker under test. This solution innovatively implements an active power-off function. When the circuit breaker under test fails to disconnect in time, the auxiliary circuit breaker will immediately respond and cut off the power supply, ensuring the safety of the test and avoiding serious accidents such as short circuits and fires.

[0045] Example 1: A preventive test device for electrical equipment, please refer to Figure 1-Figure 7 As shown, it includes: a workbench 1; a support frame 2, which is arranged on the workbench 1; a fixed seat 3, which is fixed to the support frame 2; a mirror-distributed limit frame 4, both of which are installed on the support frame 2; a mirror-distributed first sliding frame 5, which is slidably connected to the support frame 2, and the opposite sides of the mirror-distributed first sliding frame 5 are fixedly connected to the first fixed frame 6, and the opposite sides of the mirror-distributed first fixed frame 6 are provided with a protective shell 7, and the protective shell 7 is fixedly connected to the electrical connector 8; a circuit breaker 9, which is installed on the lower side of the first sliding frame, and the circuit breaker 9 is used to urgently disconnect the electrical connection of the adjacent objects under test; a resistance adjustment component, which is arranged on the first sliding frame 5 containing the circuit breaker 9, when the object under test needs to be tested, the resistance adjustment component connects the electrical connector 8 with the adjacent circuit breaker 9, and changes the input voltage of the circuit breaker 9 according to different test requirements of the object under test; a driving component, which is arranged on the support frame 2, and is used to drive the mirror-distributed first sliding frames 5 to move simultaneously.

[0046] In the above scheme, the workbench 1 is provided with a control terminal (not shown in the figure), and the electrical components mentioned below are all electrically connected to the control terminal. The fixing seat 3, the limit frame 4, the first sliding frame 5, the first fixing frame 6, and the protective shell 7 are all made of insulating materials. The distance between the two limit frames 4 is the longitudinal length of the circuit breaker to be tested, and the distance between the two limit frames 4 can be adjusted according to actual conditions. The electrical connector 8 is made of a conductive material, such as copper. The circuit breaker 9 is the auxiliary circuit breaker in the present invention, and the voltage carried by the circuit breaker 9 is greater than the voltage of the object under test. When the object under test reaches the rated voltage but is not activated, the circuit breaker 9 actively disconnects the electrical connection of the entire circuit to protect the entire circuit. The object under test mentioned in the article is the circuit breaker under test (that is, the workpiece tested in the present invention).

[0047] Please refer to Figure 2 、 Figure 5 、 Figure 6 and Figures 9-11 As shown, the resistance adjustment assembly includes: a fixed shell 10, which is installed on the adjacent first sliding frame 5, the first sliding frame 5 containing the fixed shell 10 is fixedly connected to a conductive frame 11, the conductive frame 11 is fixedly connected to a plurality of resistors 12, the conductive frame 11 is fixedly connected to a mirror-distributed conductive frame 13, the conductive frame 13 away from the adjacent electrical connector 8 is connected to the circuit breaker 9 through a first wire, the conductive frame 11 is fixedly connected to a conductive rod 14, the electrical connector 8 is provided with a second wire, the conductive rod 14 is electrically connected to the second wire of the adjacent electrical connector 8, and the conductive rod 14 is slidably and rotatably connected to the resistor 12 The conductive sheet 15 in contact with the conductive rod 14 is slidably connected with a sliding block 16, the sliding block 16 is slidably connected to the fixed shell 10, the sliding block 16 is slidably and rotatably connected to the conductive rod 14, a first spring is provided between the sliding block 16 and the conductive sheet 15, and a scale is provided on the fixed shell 10, the scale is used to display the position of the sliding block 16, and the driving assembly includes: a first driving member 18, which is fixed to the support frame 2, and the mirror-distributed first sliding frames 5 are all fixed with rack racks 19, and the driving shaft of the first driving member 18 is fixed with a gear that is meshed with the mirror-distributed rack racks 19.

[0048] In the above scheme, the fixed shell 10 and the sliding block 16 are both made of insulating materials, and the conductive frame 11, the conductive frame 13, the conductive rod 14, and the conductive sheet 15 are all made of conductive materials, such as copper. The two mirror-distributed conductive frames 13 are located on the outside of all the resistors 12, and the opposite sides of the mirror-distributed conductive frames 13 are in contact with the adjacent resistors 12 respectively. When in use, the second wire transmits current through the conductive rod 14, the conductive sheet 15 and the resistor 12 located below the conductive sheet 15 to the lower conductive frame 13, and then the lower conductive frame 13 guides the current into the circuit breaker 9 through the first wire. The closer the distance between the conductive sheet 15 and the lower conductive frame 13, the smaller the resistance. Conversely, the farther the distance between the conductive sheet 15 and the lower conductive frame 13, the larger the resistance. When the resistance needs to be adjusted, the contact between the conductive sheet 15 and the adjacent resistor 12 is preferentially disconnected so that the conductive sheet 15 does not rub along the resistor 12 when moving. The first driving member 18 is a motor.

[0049] Please refer to Figure 6 、 Figure 9 and Figure 10 As shown, the opposite sides of the mirror-image distribution protection shells 7 are slidably connected with second sliding frames 20 , a second spring is provided between the second sliding frame 20 and the adjacent protection shell 7 , and the second sliding frame 20 is provided with two inclined surfaces.

[0050] In the above solution, taking the second sliding frame 20 on the lower side as an example, in the vertical direction, the distance between the upper side of the second sliding frame 20 and the adjacent protective shell 7 is greater than the distance between the upper side of the electrical connector 8 and the adjacent protective shell 7. The position of the circuit breaker under test is fine-tuned by the contact between the second sliding frame 20 and the circuit breaker under test.

[0051] Working principle: When the circuit breaker needs to be tested, the staff first connects the second wire located on the upper side of the electrical connector 8 to the current output end, and then connects the lower side of the circuit breaker 9 to the current input end to complete the preparation work before testing the circuit breaker.

[0052] After completing the preparations for testing the circuit breaker, the staff placed the circuit breaker to be tested between the two limit racks 4 and brought it close to the two protective shells 7. The control terminal then controlled the first driving member 18 to drive the gear on it to rotate, so that the gears on the drive shaft of the first driving member 18 respectively drove the adjacent first sliding racks 5 to move toward each other through the two rack racks 19. The following takes the movement of the parts on the lower first sliding rack 5 as an example:

[0053] The movement of the lower first sliding frame 5 drives the synchronous movement of the first fixed frame 6, protective shell 7, electrical connector 8, second sliding frame 20, and its associated parts. When the center of the circuit breaker under test is not aligned with the center of the two first sliding frames 5, the second sliding frame 20 moves upward along with the protective shell 7, causing the inclined surface of the second sliding frame 20 to press against the circuit breaker under test (at this time, the second spring on the second sliding frame 20 is not compressed). This compresses the circuit breaker under test and causes it to move along the two limiting frames 4 toward the center of the two first sliding frames 5.

[0054] When the circuit breaker under test moves to a point where its center is aligned with the center of the two first sliding frames 5 (this is the optimal position for testing the circuit breaker under test), the inner side of the second sliding frame 20 contacts the circuit breaker under test. As the first sliding frame 5 continues to drive the movement of its attached parts, the protective shell 7 presses against the adjacent second sliding frame 20, thereby causing relative displacement between the second sliding frame 20 and the adjacent protective shell 7, squeezing the second spring between them (causing the second spring to gradually compress).

[0055] When the electrical connector 8 moves along with the first sliding frame 5 until it contacts the wiring terminals of the circuit breaker under test, the drive shaft of the first driving member 18 stops rotating. At this time, the rack frame 19, the first sliding frame 5, and its attached parts all stop moving. Through the above-mentioned adjustment of the circuit breaker under test, the electrical connector 8 and the wiring terminals of the circuit breaker under test are aligned with their middle parts on the same vertical line after contact. This is used to reduce resistance and unstable contact, effectively prevent the occurrence of false connection, make the current path more stable, and thus improve the accuracy and reliability of the measurement results.

[0056] After the circuit breaker to be tested is connected, the current output terminal, the upper second wire, the upper electrical connector 8, the circuit breaker to be tested, the lower electrical connector 8, the lower second wire, the conductive rod 14, the resistor 12, the lower conductive frame 13, the first wire, the circuit breaker 9, and the current input terminal are electrically connected. At this time, the control terminal supplies current to the current input terminal, causing the current to gradually pass through the aforementioned components.

[0057] When the voltage exceeds the voltage that the circuit breaker to be tested can withstand, the circuit breaker to be tested is triggered, thereby disconnecting the electrical connection of the entire line, thereby completing the test of the circuit breaker to be tested.

[0058] When an unexpected situation occurs in the internal parts of the circuit breaker to be tested, causing the voltage to exceed the circuit breaker to be tested but it is not triggered, the current continues to increase. When the voltage exceeds the voltage that the circuit breaker 9 can withstand, the circuit breaker 9 is triggered (the voltage at this time has exceeded the voltage of the circuit breaker to be tested), thereby achieving active power outage of the entire line.

[0059] After the test of the circuit breaker to be tested is completed, the control terminal controls the first driving member 18 to rotate in the opposite direction, so that the gear on the driving shaft of the first driving member 18 drives the two rack racks 19 to move in the opposite direction. The rack rack 19 then drives the adjacent first sliding frame 5 to move in the opposite direction. During the reverse movement of the first sliding frame 5, the elastic force of the spring on the second sliding frame 20 causes the adjacent second sliding frame 20 to be displaced relative to the first sliding frame 5. During the process of the first sliding frame 5 driving the adjacent electrical connector 8 to move, the electrical connector 8 is no longer in contact with the circuit breaker to be tested.

[0060] When the second sliding frame 20 and the protective shell 7 are relatively displaced to Figure 10 After the second spring between the two is no longer compressed, the first sliding frame 5 drives the adjacent second sliding frame 20 to move synchronously through the adjacent protective shell 7 until it moves to Figure 3 and Figure 4 In the state in which the circuit breaker test is completed (after the circuit breaker test is completed, the staff closes the circuit breaker 9), when the voltage delivered by the present invention reaches the voltage at which the circuit breaker to be tested is triggered to trip, the circuit breaker is tripped, and the circuit breaker meets the standard. When the voltage delivered by the present invention exceeds the voltage at which the circuit breaker to be tested is triggered to trip but the circuit breaker to be tested is not triggered to trip, the circuit breaker 9 is triggered, and the circuit breaker fails to meet the standard.

[0061] When the circuit breaker needs to be tested again, just repeat the above steps.

[0062] When different circuit breakers need to be tested, the staff first adjusts the resistance of the circuit breaker 9 according to the rated power of the next circuit breaker to be tested. When a circuit breaker with a large rated power needs to be tested, the staff first presses the conductive sheet 15 to rotate the conductive sheet 15 along the conductive rod 14 and squeeze the first spring. Then the staff moves the conductive sheet 15 and the sliding block 16 downward to reduce the number of resistors 12 located between the lower conductive frame 13 and the conductive sheet 15, thereby reducing the resistance to the current (when the current resistance needs to be increased, the conductive sheet 15 can be moved upward). After the adjustment is completed, the staff releases the conductive sheet 15. The conductive sheet 15 is reset along the conductive rod 14 under the action of the first spring and contacts the adjacent resistor 12. The effect of the above-mentioned method of first disengaging the conductive sheet 15 from contact with the resistor 12 and moving it again is: by optimizing the adjustment method, the problem of excessive wear between the two when the existing slider slides directly along the resistance wire is avoided, thereby effectively extending the service life of the slider and maintaining the stability of the conductivity.

[0063] Example 2: Based on Example 1, please refer to Figure 5 、 Figure 6 、 Figure 9 and Figure 10As shown, it also includes: mirror-distributed linear displacement sensors 21, which are respectively fixed to the opposite sides of the mirror-distributed first sliding frames 5, and the side of the linear displacement sensor 21 away from the adjacent first sliding frame 5 is fixed to the adjacent protective shell 7, and the protective shell 7 is slidably connected to the adjacent first fixed frame 6.

[0064] In the above solution, the distance between the adjacent protective shells 7 and the first sliding frame 5 is detected by the linear displacement sensor 21 to determine whether the electrical connector 8 enters the wiring terminal of the circuit breaker under test.

[0065] Please refer to Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown, it also includes: a mirror-distributed test component, all of which are arranged on the support frame 2, and the test component is used to test the screws on the object to be tested, and the test component includes: a second fixed frame 22, fixed to the adjacent limiting frame 4, the second fixed frame 22 is fixed with a second driving member 23, the driving shaft of the second driving member 23 is splined with a sliding rod, the sliding rod on the driving shaft of the second driving member 23 is provided with a rotating member 24, the sliding rod on the driving shaft of the second driving member 23 is fixed with a spring telescopic rod 25, the side of the spring telescopic rod 25 away from the adjacent second driving member 23 is connected to the rotating member 24 for limited rotation, the first fixed frame 6 is fixed with an extrusion frame 26, the extrusion frame 26 is provided with a sliding groove, the extrusion frame 26 is slidably connected to a guide frame 27 that slides along the sliding groove therein, the guide frame 27 is fixed with the sliding rod on the driving shaft of the adjacent second driving member 23 for limited rotation, the telescopic end of the spring telescopic rod 25 is fixed with evenly distributed spring pins 28, and a groove for limiting the adjacent spring pins 28 is provided in the rotating member 24.

[0066] In the above embodiment, the second driving member 23 is a motor, and the rotating member 24 is made of an insulating material. When the rotating member 24 contacts the screw of the circuit breaker terminal under test, the rotating member 24 drives the screw of the circuit breaker terminal under test to rotate, thereby detecting whether the screw of the circuit breaker terminal under test is normal. If the rotating member 24 fails to insert into the screw of the circuit breaker terminal under test in time, the spring expansion rod 25 is compressed. As the rotating member 24 rotates, the spring expansion rod 25 drives the rotating member 24 into the screw of the circuit breaker terminal under test. When the rotating member 24 screws the screw of the circuit breaker terminal under test to the limit position, the spring expansion rod 25 drives the spring pin 28 to rotate synchronously during rotation, and the expansion portion of the spring pin 28 continuously contacts the groove on the adjacent rotating member 24.

[0067] Working Principle: During circuit breaker measurement, if the terminal is screwed in too deeply, the energized portion of the test equipment will lose effective electrical connection with the terminal. This can affect the accuracy and reliability of the measurement and may even render the measurement impossible. To address this issue, the present invention employs a pre-detection method that prioritizes detecting the distance between the terminal and the energized portion of the test equipment. If the distance changes, the screw on the circuit breaker terminal is actively turned in the opposite direction, allowing the energized portion of the test equipment to enter the terminal and complete the circuit breaker test.

[0068] As the two first sliding frames 5 drive the parts thereon to move toward each other, the first fixed frame 6 moves along with the adjacent first sliding frame 5 and squeezes the adjacent guide frame 27 through the sliding groove of the extrusion frame 26, so that the guide frame 27 drives the adjacent spring telescopic rod 25 and the sliding rod on the driving shaft of the adjacent second driving member 23 to move toward the rear side (the guide frame 27 slides along the sliding groove on the adjacent extrusion frame 26 during the movement).

[0069] Under normal circumstances (the wiring terminals of the circuit breaker under test are not screwed too deeply), the electrical connector 8 will not squeeze the adjacent protective shell 7 when it moves to contact the circuit breaker under test, nor will the protective shell 7 squeeze the adjacent side of the linear displacement sensor 21. After the electrical connector 8 contacts the circuit breaker under test, the rotating member 24 has already contacted the screws at the wiring terminals of the circuit breaker under test.

[0070] When the terminal of the circuit breaker under test is screwed too deeply, the electrical connector 8 is blocked by the circuit breaker under test and squeezes the adjacent protective shell 7. As the protective shell 7 slides along the adjacent first fixed frame 6, it squeezes the adjacent linear displacement sensor 21, causing the telescopic portion of the linear displacement sensor 21 to retract. The retraction of the telescopic portion of the linear displacement sensor 21 indicates an abnormality of the circuit breaker under test. At this time, the linear displacement sensor 21 transmits an electrical signal via the control terminal to the adjacent second drive member 23. The drive shaft and sliding rod of the second drive member 23 drive the rotating member 24 to rotate via the spring telescopic rod 25 and the adjacent spring pin 28. The rotating member 24 drives the screw at the terminal of the circuit breaker under test to rotate, thereby allowing the electrical connector 8 to enter the terminal of the circuit breaker under test. At this time, the electrical connector 8 enters the terminal of the circuit breaker under test due to the reset of the telescopic portion of the linear displacement sensor 21. The drive shaft of the second drive member 23 rotates for a period of time and then stops moving.

[0071] If the screw at the terminal of the circuit breaker to be tested cannot be rotated, the screw at the terminal of the circuit breaker to be tested and the adjacent rotating member 24 will stop rotating. As a result, the spring telescopic rod 25 drives the adjacent spring pin 28 to squeeze the adjacent groove on the adjacent rotating member 24 when rotating, so that when the rotating member 24 rotates again, it will not drive the rotating member 24 to rotate at the same time.

[0072] After completing the test of the circuit breaker, the first sliding frame 5 drives the adjacent first fixed frame 6 and the adjacent extrusion frame 26 to move and reset. During the movement and reset of the guide frame 27 along the sliding groove on the adjacent extrusion frame 26, the spring telescopic rod 25 and its attached parts are driven to move and reset. When the circuit breaker to be tested is subsequently tested, the above action can be repeated.

[0073] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A preventive test device for electrical equipment, comprising: Workbench (1); A support frame (2) is arranged on the workbench (1); A fixing seat (3) fixedly connected to the supporting frame (2); The mirror-distributed limiting frames (4) are all installed on the supporting frame (2); The mirror-image distributed first sliding frames (5) are all slidably connected to the support frame (2), the opposite sides of the mirror-image distributed first sliding frames (5) are fixedly connected to the first fixed frames (6), the opposite sides of the mirror-image distributed first fixed frames (6) are all provided with protective shells (7), and the protective shells (7) are fixedly connected to the electrical connector (8); A circuit breaker (9) is mounted on one of the first sliding frames (5), and the circuit breaker (9) is used to urgently disconnect the electrical connection of an adjacent object under test; a resistance adjustment component, arranged on the first sliding frame (5) containing the circuit breaker (9); when the object under test needs to be tested, the resistance adjustment component connects the electrical connector (8) to the adjacent circuit breaker (9), and changes the input voltage of the circuit breaker (9) according to different test requirements of the object under test; A driving assembly is arranged on the support frame (2) and is used to drive the mirror-distributed first sliding frames (5) to move simultaneously.

2. A preventive test device for electrical equipment according to claim 1, characterized in that: The resistance adjustment component includes: A fixed shell (10) is mounted on the adjacent first sliding frame (5); the first sliding frame (5) containing the fixed shell (10) is fixedly connected to a conductive frame (11); the conductive frame (11) is fixedly connected to a plurality of resistors (12); the conductive frame (11) is fixedly connected to a mirror-distributed conductive frame (13); the conductive frame (13) away from the adjacent electrical connector (8) is connected to the circuit breaker (9) through a first wire; the conductive frame (11) is fixedly connected to a conductive rod (14); the electrical connector (8) is provided with a second wire; the conductive rod (14) is electrically connected to the second wire of the adjacent electrical connector (8); the conductive rod (14) is slidably and rotatably connected to a conductive sheet (15) in contact with the resistor (12).

3. A preventive test device for electrical equipment according to claim 2, characterized in that: The conductive rod (14) is slidably connected to a sliding block (16), the sliding block (16) is slidably connected to the fixed shell (10), the sliding block (16) is slidably and rotatably connected to the conductive rod (14), a first spring is provided between the sliding block (16) and the conductive sheet (15), and a scale is provided on the fixed shell (10), the scale is used to display the position of the sliding block (16).

4. A preventive test device for electrical equipment according to claim 3, characterized in that: The drive assembly includes: The first driving member (18) is fixed to the support frame (2), and the mirror-distributed first sliding frames (5) are all fixed to rack frames (19), and the driving shaft of the first driving member (18) is fixed to a gear meshing with the mirror-distributed rack frames (19).

5. A preventive test device for electrical equipment according to claim 1, characterized in that: The mirror-image-distributed protective shells (7) are both slidably connected to the opposite sides thereof with second sliding frames (20), a second spring is provided between the second sliding frame (20) and the adjacent protective shell (7), and the second sliding frame (20) is provided with two inclined surfaces.

6. A preventive test device for electrical equipment according to claim 5, characterized in that include: Mirror-distributed linear displacement sensors (21) are respectively fixed to opposite sides of the mirror-distributed first sliding frames (5), and the side of the linear displacement sensor (21) away from the adjacent first sliding frame (5) is fixed to the adjacent protective shell (7), and the protective shell (7) is slidably connected to the adjacent first fixed frame (6).

7. A preventive test device for electrical equipment according to claim 4, characterized in that include: The mirror-distributed test components are all arranged on the support frame (2), and the test components are used to test the screws on the object to be tested. The test components include: The second fixed frame (22) is fixed to the adjacent limiting frame (4), the second fixed frame (22) is fixed with a second driving member (23), the driving shaft of the second driving member (23) is spline-connected with a sliding rod, and the sliding rod on the driving shaft of the second driving member (23) is provided with a rotating member (24).

8. A preventive test device for electrical equipment according to claim 7, characterized in that: A spring telescopic rod (25) is fixedly connected to the sliding rod on the driving shaft of the second driving member (23), and the spring telescopic rod (25) is connected to the rotating member (24) in a limited rotation manner at a side away from the adjacent second driving member (23).

9. A preventive test device for electrical equipment according to claim 8, characterized in that: The first fixed frame (6) is fixedly connected to an extrusion frame (26), the extrusion frame (26) is provided with a sliding groove, the extrusion frame (26) is slidably connected to a guide frame (27) that slides along the sliding groove inside the extrusion frame (26), and the guide frame (27) is connected to a sliding rod on the driving shaft of the adjacent second driving member (23) in a limited rotation manner.

10. A preventive test device for electrical equipment according to claim 9, characterized in that: The telescopic end of the spring telescopic rod (25) is fixedly connected with evenly distributed spring pins (28), and the rotating member (24) is provided with grooves for limiting the adjacent spring pins (28).

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