Rapid switching device and rapid switching method of relay protection tester

Abstract

The invention relates to the technical field of relay protection devices, and provides a rapid switching device and method for a relay protection tester, and the device comprises a relay protection tester, a clamping mechanism of a to-be-tested device, and a connecting mechanism. The connecting mechanism comprises a push-pull device and a butt joint mechanism arranged on the push-pull device. The docking mechanism comprises a plurality of push-pull rods arranged corresponding to interfaces of the relay protection tester, and the tail end of each push-pull rod is sequentially connected with a push rod and a supporting seat; a movable limiting block is arranged on the supporting seat; a reset rod is slidably arranged in the push rod, and when the reset rod is located at a first position in the push rod, the reset rod exerts force on the limiting block, so that the limiting block moves to a line pressing position; when the reset rod is at the second position of the push rod, the reset rod is far away from the limiting block, so that the limiting block is at the release position. Wiring can be aligned with the interface of the relay protection tester, stable connection and rapid adjustment during misalignment can be realized, and each interface can be independently detected.

Description

Technical Field

[0001] The present disclosure relates to the technical field related to relay protection devices, and in particular to a quick switching device and a quick switching method for a relay protection tester. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] During the use of relay protection tester equipment, it is crucial to ensure the stability of wiring and the accuracy of test data. As the complexity of the power system increases, relay protection devices need to be tested more comprehensively and accurately. Generally, they are tested by connecting the relay protection tester to the relay protection device. If manual wiring is used, there are problems such as poor safety, low test accuracy and low test efficiency. Therefore, it is necessary to set up a switching device to achieve rapid connection of various types of relay protection devices for testing. However, the existing switching devices have many deficiencies in assisting the fixation of wiring, which can easily lead to poor contact, thereby affecting the accuracy of the test results.

[0004] The inventor found in the research that the existing relay switching device is usually unable to assist in fixing the wiring of the tested device, resulting in poor contact, and is unable to distinguish and detect according to different lines of the device; when the existing relay protection tester switching device detects the device under test, it often uses a simple fixing or sliding mechanism to connect the wiring of the device under test with the interface of the test instrument. Due to the lack of effective auxiliary fixation of the wiring, especially during the movement or docking process, the wiring is prone to deviation or poor contact, resulting in inaccurate test data. In addition, the existing device cannot automatically distinguish and synchronously detect the wiring of different lines, and the comprehensiveness of the detection is also affected; for example, the patent application number is CN202311311712.0, and the patent name is: A patent for a quick switching device for a relay protection tester. The device to be tested is fixed as a whole on the surface of the mounting plate, and then the push-pull rod pushes the mounting plate to move the device to be tested as a whole, thereby connecting the wiring terminals of the device to be tested with the interface of the relay protection tester. However, this method cannot effectively fix the wiring of the device to be tested during the movement, resulting in the inability to align the interface, which is prone to poor contact. At the same time, it is impossible to distinguish and detect different lines of the device to be tested, so that the detection data is incomplete, resulting in low detection efficiency. Summary of the invention

[0005] In order to solve the above problems, the present disclosure proposes a quick transfer device and a quick transfer method for a relay protection tester. A structure for automatic wiring extrusion is set in the docking mechanism, which can align the wiring with the interface of the relay protection tester and achieve stable connection and quick adjustment when misaligned. At the same time, separately controlled electric push rods are set for different interfaces to achieve independent detection.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0007] One or more embodiments provide a quick switching device for a relay protection tester, comprising a relay protection tester, a clamping mechanism of a device to be tested, and a connecting mechanism; the connecting mechanism is used to connect the wiring of the relay protection tester and the device to be tested, and comprises a push-pull device and a docking mechanism arranged on the push-pull device;

[0008] The docking mechanism includes a plurality of push-pull rods corresponding to the interfaces of the relay protection tester, and the end of each push-pull rod is connected with a push rod and a support seat in sequence; a movable limit block is arranged on the support seat;

[0009] A reset rod is slidably arranged in the push rod. When the reset rod is in the first position in the push rod, the reset rod applies force to the limit block, so that the limit block moves to the line pressing position; when the reset rod is in the second position of the push rod, the reset rod is away from the limit block, so that the limit block is in the release position.

[0010] One or more embodiments provide a quick switching method based on the quick switching device of the relay protection tester, comprising the following steps:

[0011] Fix the device under test on the clamping mechanism;

[0012] Insert the wires of the device to be tested into the docking holes respectively, control the corresponding push-pull rods to work, and drive the push rods to move horizontally;

[0013] The front end of the push rod moves forward through the connecting port of the support seat, and the limit block is pushed out to fix the wiring;

[0014] The force-bearing block is against the support seat, the first spring is compressed, and the force-bearing block provides thrust to the support seat;

[0015] The support seat pushes the docking plate so that the docking plate is connected to the interface of the relay protection tester, thereby completing the rapid transfer of the relay protection tester.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present disclosure, firstly, a structure for automatically squeezing and fixing the wiring is designed in the docking mechanism. Through the telescopic operation of the push rod, the wiring can be accurately aligned with the interface of the relay protection tester to ensure the stability of the connection. At the same time, when the wiring position is not aligned or the contact is poor, the user can quickly release the limit block to adjust the wiring, which significantly improves the flexibility and efficiency of the operation. In addition, for different interfaces, separately controlled electric push rods are designed, which can be operated and detected independently, improving the reliability of multi-interface detection.

[0018] The advantages of the present disclosure and the advantages of additional aspects will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure but do not constitute a limitation of the present disclosure.

[0020] Figure 1 is a structural exploded diagram of the cross-section of the docking mechanism 3 of the embodiment 1 of the present disclosure;

[0021] Figure 2 is a schematic structural diagram of the docking mechanism 3 after assembly according to Embodiment 1 of the present disclosure;

[0022] Figure 3 It is an exploded view of the structure after the docking mechanism 3 and the power box 6 of the embodiment 1 of the present disclosure are connected;

[0023] Figure 4 is a schematic diagram of the overall structure of the quick switching device of Example 1 of the present disclosure;

[0024] Figure 5 is a schematic structural diagram of the clamping mechanism 2 of Embodiment 1 of the present disclosure;

[0025] Figure 6 It is a schematic diagram of the overall structure of the quick switching device of Embodiment 1 of the present disclosure after the wiring connector 11 is provided;

[0026] Figure 7 It is a partial enlarged view of the quick switching device of the embodiment 1 of the present disclosure where the wiring connector 11 is provided;

[0027] Among them: 1. Base;

[0028] 2. Clamping mechanism; 21. Mounting seat; 22. Rotating groove; 23. Threaded rod; 24. Rotating handle; 25. Clamping block; 26. Abutment pad;

[0029] 3. Docking mechanism; 31. Support seat; 32. Connecting port; 33. Moving slot; 34. Limiting block;

[0030] 35. Push rod; 36. Active hole; 37. Side groove; 38. Clamping block; 39. Reset rod; 391. Extrusion block; 392. Force bearing block; 393. First spring;

[0031] 4. Docking plate; 5. Relay protection tester; 6. Power box; 7. Push-pull rod; 8. Docking block; 9. Docking hole; 10. Wiring interface; 11. Wiring connector. DETAILED DESCRIPTION

[0032] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. It should be noted that, in the absence of conflict, the various embodiments in the present disclosure and the features in the embodiments can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0035] Example 1

[0036] In the technical solutions disclosed in one or more embodiments, Figures 1 to 5 As shown, a quick switching device for a relay protection tester comprises: a relay protection tester 5, a clamping mechanism 2 of a device to be tested, and a connecting mechanism; the connecting mechanism is used to connect the wiring of the relay protection tester 5 and the device to be tested, and the connecting mechanism comprises a push-pull device and a docking mechanism 3 arranged on the push-pull device;

[0037] The docking mechanism 3 includes a plurality of push-pull rods 7 corresponding to the interfaces of the relay protection tester 5, and the end of each push-pull rod 7 is connected to a push rod 35 and a support seat 31 in sequence; a movable limit block 34 is provided on the support seat 31;

[0038] A reset rod 39 is slidably provided inside the push rod 35. When the reset rod 39 is in the first position inside the push rod 35, the reset rod 39 applies force to the limit block 34, so that the limit block 34 moves to the line pressing position; when the reset rod 39 is in the second position of the push rod 35, the reset rod 39 is away from the limit block 34, so that the limit block 34 is in the release position.

[0039] When in use, the device to be tested is fixed on the clamping mechanism 2 of the quick switching device, and then the wiring of the device to be tested is fixed on the docking mechanism 3; a controller can be set to control the push-pull rod 7 to extend, so that the docking mechanism 3 is connected to the corresponding interface of the relay protection tester 5. During the pushing process, the reset rod 39 moves at the same time to apply force to the limit block 34, so that the limit block 34 squeezes the wiring to fix it, and at the same time the support seat 31 is pushed and connected to the corresponding wiring interface 10 of the relay protection tester 5 through the support seat 31.

[0040] When the wiring of the device under test is not accurately fixed on the support base 31 or has poor contact, the reset rod 39 can be pushed to move to the second position, so that the limit block 34 is in the release position, the wiring is released, and after the wiring position is adjusted, the reset rod 39 is pushed to move to the first position to stably fix the wiring on the support base 31.

[0041] In this embodiment, firstly, a structure for automatically squeezing and fixing the wiring is designed in the docking mechanism 3. By telescoping the push rod 35, the wiring can be accurately aligned with the interface of the relay protection tester 5 to ensure the stability of the connection. At the same time, when the wiring position is not aligned or the contact is poor, the user can quickly release the limit block 34 to adjust the wiring, which significantly improves the flexibility and efficiency of the operation. In addition, for different interfaces, separately controlled electric push rods are designed, which can be independently operated and detected, thereby improving the reliability of multi-interface detection.

[0042] In this embodiment, the docking mechanism 3 is fixedly arranged at the end of the push-pull rod 7. Under the pushing action of the push-pull rod 7, the connection between the wiring of the device under test and the relay protection tester 5 is realized; wherein the device under test is a relay protection device.

[0043] A specific implementation structure, such as Figure 1 As shown, it is a schematic diagram of a three-dimensional structure after sectioning, the docking mechanism 3 includes a push rod 35, and a support seat 31 is slidably provided at the end of the push rod 35; a movable hole 36 is opened in the center of the push rod 35, and a reset rod 39 is slidably provided in the movable hole 36, and the movable hole 36 is used to provide a sliding space for the reset rod 39 to slide in the push rod 35;

[0044] Furthermore, a side groove 37 is provided on the push rod 35, and the side groove 37 is connected with the movable hole 36; the reset rod 39 is arranged in the movable hole 36 by abutting against the first spring 393, and the reset rod 39 is provided with an extrusion block 391 and a force block 392; the extrusion block 391 is located at the position of the two side grooves 37, the outer wall of the extrusion block 391 is adapted to the inner wall of the side groove 37, and the force block 392 extends out of the side groove 37, and the compression or extension of the first spring 393 is realized by the action of the force block 392;

[0045] Specifically, the outer surface of the extrusion block 391 is flush with the surface of the reset rod 39 to form an arc surface;

[0046] It should be noted that the length of the reset rod 39 can be set to half the length of the side groove 37, so that when the force block 392 is pushed, the reset rod 39 is translated along the side groove 37;

[0047] In this embodiment, the reset rod 39 is stably fixed in the movable hole 36 by the extrusion block 391 to prevent the reset rod 39 from rotating in the movable hole 36. The top of the force block 392 protrudes from the reset rod 39 and is located outside, so that the lateral force is applied to realize the action of the first spring 393. The extrusion block 391 reduces the lateral force of the force block 392, so that the lateral action of the reset rod 39 is smoother and the stagnation is avoided.

[0048] Optionally, the side grooves 37 are provided on the upper and lower surfaces of the surface of the push rod 35 , and the two side grooves 37 are opposite to each other and have the same size.

[0049] In a further technical solution, the support seat 31 is slidably arranged at the end of the push rod 35, and the structure is as follows Figure 1 As shown, a connecting port 32 is provided in the middle of the support seat 31, and the connecting port 32 is movably connected to the push rod 35. Both upper and lower ends of the connecting port 32 penetrate the support seat 31 to provide movable grooves 33, and movably connected limit blocks 34 are provided in the two movable grooves 33.

[0050] Specifically, the limit block 34 can move up and down in the moving groove 33. When the limit block 34 is moved out of the moving groove 33, the wiring arranged up and down can be fixed.

[0051] Optionally, the limit block 34 is arranged in the moving groove 33 through an elastic connection device; the elastic connection device can be an elastic sheet or a second spring;

[0052] Specifically, the lower end surface of the limit block 34 can be set to a wedge shape. When the push rod 35 is inserted into the connecting port 32, the lower end surface of the upper limit block 34 generates an upward force, and the upper end surface of the upper limit block 34 generates an upward force so that the limit block 34 is disengaged from the movable groove 33, and the wiring is squeezed and fixed.

[0053] In this embodiment, the clamping block 38 is pressed into the connecting port 32 and abuts against the limit block 34, so that the two limit blocks 34 are extended from the support seat 31 to clamp and fix the wiring in the docking hole 9, and the limit at the front end of the docking hole 9 is retracted to form a clamping connection between the front and rear ends of the docking wire, so that the wiring is fixed in the docking hole, and the docking plate 4 is aligned with the docking hole 9 through the through hole in the middle of the support seat 31, maintaining the docking with the relay protection tester, thereby preventing the wiring from being offset during the docking process, resulting in poor contact.

[0054] A structure that can be realized is that a clamping block 38 is fixedly provided at one end of the push rod 35 away from the first spring 393, and the outer diameter of the clamping block 38 is larger than the inner diameter of the connecting port 32 opened in the middle of the support seat 31; the clamping block 38 realizes the positioning of the push rod 35 on the connecting port 32 to prevent the push rod 35 from falling out of the connecting port 32;

[0055] A further technical solution is that a docking plate 4 is fixedly provided at the end of the support seat 31, and a docking hole 9 is provided on the docking plate 4, and the docking hole 9 is used to realize an interface connection with the relay protection tester 5;

[0056] Specifically, a docking plate 4 is fixedly provided at one end of the support seat 31 away from the push rod 35, and a docking block 8 is protruding outward from the side surface of the docking plate 4 facing the relay protection tester 5, and a plurality of docking holes 9 are opened on the surface of the docking block 8, and the outlet of the docking hole 9 is recessed inward to form an inner ring to realize the interface connection with the relay protection tester 5.

[0057] Optionally, the support seat 31 is in the shape of a rectangular parallelepiped as a whole;

[0058] Furthermore, the surface of the docking plate 4 surrounds the support seat 31, thereby achieving a surrounding fixation of the support seat 31;

[0059] In the above structure, if Figure 3 As shown, the push rod 35 is pushed, and the front end of the push rod 35 moves forward through the connecting port 32 of the support seat 31, and the limit block 34 is pushed out to fix the connection wire; when the force block 392 is against the support seat 31, the first spring 393 is compressed, and the force block 392 provides a thrust to the support seat 31; the support seat 31 transmits the force to the docking plate 4, so that the docking plate 4 is connected to the interface of the relay protection tester 5;

[0060] The reset rod 39 translates along the movable hole 36, and the extrusion block 391 moves synchronously along the side groove 37. When the extrusion block 391 is located on the left side of the side groove 37, the left side of the push rod 35 is in a complete state, which is convenient for supporting the subsequent limit block 34. When the extrusion block 391 is located on the right side of the side groove 37, the left side of the push rod 35 is in a hollow state, thereby recovering the limit block 34 and canceling the fixation of the docking line, which is convenient for adjustment and disassembly.

[0061] A specific implementation method, such as Figure 6 and Figure 7 As shown, the method for implementing the fixed wiring by squeezing the limit block 34 is further provided with a wiring connector 11, the wiring of the device under test is connected to the wiring connector 11 and is arranged in the docking hole 9, the wiring connector 11 is a hard conductive material, and one side of the wiring connector 11 is limited by the limit block 34 to be fixed in the docking hole 9;

[0062] In this embodiment, the width of the limit block 34 can cover the two docking holes 9, and can fix the wiring connectors 11 provided in the two docking ports;

[0063] The wiring connector 11 extends through the docking hole 9 and can be connected to the wiring interface 10 on the relay protection tester 5;

[0064] Optionally, the length of the wiring connector 11 can be set, and the wiring connector 11 passes through the docking hole 9 and is at least flush with the protruding surface of the docking block 8 or extends out to a set height;

[0065] Optionally, the push-pull device can adopt an electric push device, including a push-pull rod 7 that can be pushed and pulled by the electric push device, the electric push device includes a power box 6 and a push-pull motor, the power output end of the push-pull motor is connected to the push-pull rod 7, a plurality of electric push rods are arranged on the surface of the power box 6, and a docking mechanism 3 is arranged on each electric push rod. Each electric push rod is controlled separately, and when the interface that needs to be docked is determined, the corresponding electric push rod is controlled to push the corresponding docking mechanism 3.

[0066] In this embodiment, a plurality of electric push rods are connected to the power box 6 to form a plurality of push rods 35 corresponding to the electric push rods, so that the plurality of docking plates 4 drive different wirings to be inserted into the relay protection tester 5 respectively, thereby distinguishing and detecting the wirings corresponding to different functions of the equipment to be tested, thereby improving the comprehensiveness of the detection data.

[0067] It should be noted that the telescopic end of each electric push rod is provided with a docking mechanism 3 of the same structure, and the width of each docking block 8 is consistent with the groove of the wiring interface 10 of the relay protection tester 5, and each docking hole 9 is vertically aligned with a wiring interface 10;

[0068] To achieve a compact structure, further, as Figure 4 As shown, it also includes a base 1, a power supply box 6, a clamping mechanism 2 of the device to be tested, and a relay protection tester 5 are arranged on the base 1, the relay protection tester 5 and the side of the power supply box 6 where the electric push rod is arranged are arranged opposite to each other, and the clamping mechanism 2 of the device to be tested is arranged on the side of the power supply box except the side where the electric push rod is arranged;

[0069] In some embodiments, the clamping mechanism 2 can be as follows Figure 5 As shown, it includes a mounting seat 21, a threaded rod 23 arranged on the mounting seat 21, two opposite clamping blocks 25 are arranged at both ends of the threaded rod 23, and a rotating handle 24 is arranged at one end of the threaded rod 23; the rotation of the threaded rod 23 drives the clamping blocks 25 to move horizontally on the threaded rod 23, thereby changing the distance between the clamping blocks 25 to achieve the support of the device to be tested.

[0070] A feasible technical solution is that a rotation groove 22 is provided on the mounting seat 21, and threaded rods 23 are rotatably provided on both sides of the rotation groove 22;

[0071] Optionally, the rotation groove 22 can be set to be an arc shape or a rectangular groove; the threads of the threaded holes connected to the threaded rod 23 at the bottom of the two clamping blocks 25 are opposite;

[0072] Furthermore, abutment pads 26 are glued and fixedly connected to the surfaces of the two clamping blocks 25 on one side opposite to each other. The abutment pads 26 are made of rubber material and have a buffering property.

[0073] Reference Figure 4 and Figure 5 , rotating the handle 24 drives the threaded rod 23 to rotate synchronously, and the rotation of the threaded rod 23 drives the two clamping blocks 25 to move toward each other on the surface of the threaded rod 23, so as to clamp and fix the device to be tested. As the two clamping blocks 25 clamp and abut against the device to be tested, the two abutting pads 26 are driven to abut against the surface of the device to be tested. The elastic abutment of the rubber material improves the fixation of the device to be tested and prevents the device to be tested from being worn by friction with the clamping blocks 25 during the clamping process.

[0074] Among them, the relay protection tester 5, the power box 6 and the electric push rod of the device are all existing technologies, and their structural principles are not described in detail.

[0075] Example 2

[0076] Based on Example 1, this embodiment provides a quick switching method based on a quick switching device of a relay protection tester described in Example 1, comprising the following steps:

[0077] Step 1, fix the device to be tested on the clamping mechanism 2;

[0078] Step 2, insert the wiring of the device to be tested into the docking hole 9 respectively, control the corresponding push-pull rod 7 to work, and drive the push rod 35 to move horizontally;

[0079] Step 3, the front end of the push rod 35 moves forward through the connecting port 32 of the support seat 31, and the limit block 34 is pushed out to fix the wiring;

[0080] Step 4: The force block 392 abuts against the support seat 31, the first spring 393 is compressed, and the force block 392 provides thrust to the support seat 31;

[0081] Step 5: The support base 31 pushes the docking plate 4 so that the docking plate is connected to the interface of the relay protection tester 5 , thereby completing the rapid transfer of the relay protection tester 5 .

[0082] In step 1, specifically, the device under test is placed on the surface of the mounting seat 21, and then the handle 24 is rotated, and the rotating handle 24 drives the threaded rod 23 to rotate, so that the two clamping blocks 25 move toward each other, and as the two clamping blocks 25 move, the two abutting pads 26 are pushed to abut against the outer surface of the device under test, so that the device under test is fixed on the surface of the mounting seat 21;

[0083] In step 2, the wiring of the device under test can be manually inserted into the docking hole 9 respectively;

[0084] In step 3, the controller can send a signal to control the operation of the electric push rod, and the telescopic end of the electric push rod is extended to drive the push rod 35 to translate. As the push rod 35 moves, the clamping block 38 moves in the connecting port 32, and finally abuts against the docking plate 4 and transmits thrust. As the clamping block 38 moves, thrust is applied to the inclined surfaces at the bottom of the two limit blocks 34, so that the two limit blocks 34 are pushed out of the moving groove 33, thereby squeezing and abutting the wiring of the device to be tested, so that the wiring is fixed in the docking hole 9;

[0085] As the docking plate 4 moves, the docking block 8 is inserted into the groove of the relay protection tester 5, forming a docking hole 9 that is aligned with the docking interface of the relay protection tester 5. Finally, the surface of the docking block 8 abuts against the groove of the relay protection tester 5, so that the wiring is inserted into the docking interface of the relay protection tester 5 for testing, which effectively ensures the alignment of the interface and prevents poor contact. At the same time, after the initial plugging by the personnel, no secondary manual plugging is required, which saves time and improves efficiency.

[0086] A further technical solution is that when the wiring is offset during the detection process, the force block 392 is pushed to move the reset rod 39 from the left side to the right side (the first position to the second position) of the movable hole 36, so that the bottoms of the two limit blocks 34 are in a hollow state, and the limit blocks 34 are inserted into the support seat 31, and the crimping of the limit blocks 34 on the docking wires is cancelled; so that personnel can adjust the offset wiring.

[0087] In this embodiment, the controller sends a signal to extend the multiple electric push rods respectively, so that the different wirings of the equipment to be tested are connected to the docking interface of the relay protection tester 5, so as to detect the different wiring functions of the equipment to be tested and make the data comprehensive.

[0088] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0089] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A quick switching device for a relay protection tester, characterized in that: It includes a relay protection tester, a clamping mechanism of the device to be tested, and a connecting mechanism; the connecting mechanism is used to connect the wiring of the relay protection tester and the device to be tested, and includes a push-pull device and a docking mechanism arranged on the push-pull device; The docking mechanism includes a plurality of push-pull rods corresponding to the interfaces of the relay protection tester, and the end of each push-pull rod is connected with a push rod and a support seat in sequence; a movable limit block is arranged on the support seat; A reset rod is slidably arranged in the push rod. When the reset rod is in the first position in the push rod, the reset rod applies force to the limit block, so that the limit block moves to the line pressing position; when the reset rod is in the second position of the push rod, the reset rod is away from the limit block, so that the limit block is in the release position.

2. A quick switching device for a relay protection tester as claimed in claim 1, characterized in that: A support seat is slidably arranged at the end of the push rod; a movable hole is opened in the center of the push rod, and a reset rod is slidably arranged in the movable hole, and the movable hole is used to provide a sliding space for the reset rod to slide in the push rod.

3. A quick switching device for a relay protection tester as claimed in claim 2, characterized in that: A side groove is provided on the push rod, and the side groove is connected with the movable hole; the reset rod is arranged in the movable hole by abutting against the first spring, and an extrusion block and a force-bearing block are provided on the reset rod; the extrusion block is located in the two side grooves, the outer wall of the extrusion block is adapted to the inner wall of the side groove, and the force-bearing block extends out of the side groove, and the compression or extension of the first spring is realized by moving the force-bearing block; A clamping block is fixedly arranged at one end of the push rod away from the first spring, and the outer diameter of the clamping block is larger than the inner diameter of the connecting port opened in the middle of the support seat.

4. A quick switching device for a relay protection tester as claimed in claim 1, characterized in that: A connecting port is provided in the middle of the support seat, and the connecting port is movably plugged with the push rod. Both upper and lower ends of the connecting port penetrate the support seat to provide movable grooves, and movably connected limit blocks are provided in the two movable grooves.

5. The quick switching device of a relay protection tester according to claim 1, characterized in that: A docking plate is fixedly arranged at the end of the support seat, and a docking block is protruding outwardly on the side surface of the docking plate facing the relay protection tester. A plurality of docking holes are opened on the surface of the docking block, and the outlets of the docking holes are recessed inwardly to form an inner ring.

6. A quick switching device for a relay protection tester as claimed in claim 5, characterized in that: The limit block moves to the wire pressing position. Specifically: the fixed wiring is squeezed by the limit block, and the fixed wiring is plugged into the docking hole through the set wiring connector. The wiring connector is a hard conductive material. The limit block extends from the support seat to squeeze and fix the wiring connector.

7. A quick switching device for a relay protection tester as claimed in claim 1, characterized in that: The clamping mechanism includes a mounting seat, a threaded rod arranged on the mounting seat, two opposite clamping blocks arranged at both ends of the threaded rod, and a rotating handle arranged at one end of the threaded rod; the rotation of the threaded rod drives the clamping block to move horizontally on the threaded rod.

8. A quick switching device for a relay protection tester as claimed in claim 7, characterized in that: A rotation groove is arranged on the mounting seat, and threaded rods are rotatably arranged on both sides of the groove of the rotation groove; Alternatively, abutment pads are glued and fixedly connected to the surfaces of the two clamping blocks on one side opposite to the other.

9. A fast switching method for a fast switching device of a relay protection tester based on any one of claims 1 to 8, characterized in that: The steps include: Fix the device under test on the clamping mechanism; Insert the wires of the device to be tested into the docking holes respectively, control the corresponding push-pull rods to work, and drive the push rods to move horizontally; The front end of the push rod moves forward through the connecting port of the support seat, and the limit block is pushed out to fix the wiring; The force-bearing block is against the support seat, the first spring is compressed, and the force-bearing block provides thrust to the support seat; The support seat pushes the docking plate so that the docking plate is connected to the interface of the relay protection tester, thereby completing the rapid transfer of the relay protection tester.

10. The fast transfer method according to claim 9, characterized in that: The steps include: When the wiring is offset during the detection process, the force block is pushed to move the reset rod from the first position of the movable hole to the second position, so that the bottoms of the two limit blocks are in a hollow state, the limit blocks are inserted into the support seat, and the crimping of the limit block docking wire is cancelled.

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