Testing tool for phase-to-ground short circuit monitoring and protecting device

Abstract

The utility model relates to the technical field of phase-to-ground short circuit monitoring and protecting device testing, in particular to a phase-to-ground short circuit monitoring and protecting device testing tool, which is used for detecting a phase-to-ground short circuit monitoring and protecting device body and comprises a positioning block, an electric plug, a testing tool body, a positioning groove, an electric slot and a positioning mechanism. The positioning block is fixedly arranged on the phase-to-ground short circuit monitoring protection device body, the electric plug is fixedly arranged on the positioning block and is in telecommunication connection with the phase-to-ground short circuit monitoring protection device body, the testing tool body is arranged on one side of the phase-to-ground short circuit monitoring protection device body, the positioning groove is formed in the testing tool body, and the electric insertion groove is formed in the groove bottom of the positioning groove. The electric slot is electrically connected with the testing tool body, the positioning mechanism is arranged in the positioning groove and used for positioning the positioning block and the side wall of the positioning groove, and through the technical scheme, the problem that the testing efficiency of the phase-to-ground short circuit monitoring protection device in the related technology is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of phase-to-ground short circuit monitoring and protection device testing, in particular to a phase-to-ground short circuit monitoring and protection device testing tool. Background Art

[0002] The phase-to-ground short circuit monitoring and protection device is a device used to monitor and protect electrical equipment from over-tripping problems caused by phase-to-ground short circuits.

[0003] The primary function of a phase-to-ground short-circuit monitoring device is to continuously monitor the zero-sequence (leakage) CT current in the fault circuit. When specific conditions are met, it trips the trip shunt coil, disconnecting the faulty power line to protect equipment and prevent significant economic losses from over-tripping. This type of device is suitable for TN grounding systems, particularly addressing issues such as non-metallic grounding in MCC lines, as well as malfunctioning molded case switches and thermal relays. This prevents PC over-tripping from causing widespread power outages.

[0004] After production, the phase-to-ground short-circuit monitoring and protection device needs to be tested. In the prior art, most phase-to-ground short-circuit monitoring and protection devices are tested using test fixtures. During the test, a telecommunication connection must be established between the phase-to-ground short-circuit monitoring and protection device and the test fixture. Therefore, wiring and disconnection operations are required during the test, resulting in low test efficiency. Utility Model Content

[0005] The utility model provides a testing tool for a phase-to-ground short circuit monitoring and protection device, which solves the problem of low testing efficiency of the phase-to-ground short circuit monitoring and protection device in the related art.

[0006] The technical solution of the utility model is as follows: a phase-to-ground short circuit monitoring and protection device test fixture is used to test the phase-to-ground short circuit monitoring and protection device body, including a positioning block, an electrical plug, a test fixture body, a positioning slot, an electrical slot and a positioning mechanism;

[0007] The positioning block is fixedly arranged on the body of the phase-to-ground short circuit monitoring and protection device;

[0008] The electric plug is fixedly arranged on the positioning block, and the electric plug is electrically connected to the main body of the phase-to-ground short circuit monitoring and protection device;

[0009] The test fixture body is arranged on one side of the phase-to-ground short circuit monitoring and protection device body;

[0010] The positioning groove is provided on the testing tool;

[0011] The electrical slot is provided at the bottom of the positioning slot, and the electrical slot is electrically connected to the test fixture body;

[0012] The positioning mechanism is arranged in the positioning groove and is used for positioning the positioning block and the side wall of the positioning groove.

[0013] Preferably, the positioning mechanism includes:

[0014] a first limiting groove, the first limiting groove being formed on two opposite side walls of the positioning groove;

[0015] a positioning frame, the positioning frame being slidably disposed in the first limiting groove;

[0016] a second limiting groove, the second limiting groove being provided on two opposite side walls of the positioning block;

[0017] A moving mechanism is provided in the positioning frame and is used for controlling the positioning frame to move.

[0018] Furthermore, the moving mechanism includes:

[0019] a cam rotatably disposed on a side wall of the first limiting groove, the cam being in contact with an inner wall of the positioning frame;

[0020] a first cavity, the first cavity being opened on one side of the first limiting groove;

[0021] A rotating mechanism is provided in the first cavity and is used for controlling the two cams to rotate.

[0022] Furthermore, the rotating mechanism includes:

[0023] a first gear, two first gears being rotatably disposed in the first cavity;

[0024] a connecting rod, the connecting rod being fixedly disposed between the first gear and the cam;

[0025] A synchronous rotation mechanism is provided in the first cavity and is used to control the two first gears to rotate synchronously.

[0026] Furthermore, the synchronous rotation mechanism includes:

[0027] a drive ring rotatably disposed in the first cavity;

[0028] a first annular rack fixedly disposed on an inner wall of the drive ring and meshing with the first gear;

[0029] A driving mechanism is provided on the test fixture body and is used to control the first gear to rotate.

[0030] On the basis of the above solution, the driving mechanism includes:

[0031] a second cavity, the second cavity being opened on one side of the first cavity;

[0032] a first bevel gear, the first bevel gear being rotatably disposed on a side wall of the second cavity, and a driving rod being fixedly disposed between the first bevel gear and one of the first gears;

[0033] a second bevel gear, the second bevel gear being rotatably disposed on a side wall of the second cavity, the second bevel gear being meshed with the first bevel gear;

[0034] A driving assembly is provided on the test fixture body and is used to control the rotation of the second bevel gear.

[0035] Based on the above solution, the driving component includes:

[0036] A handwheel, the handwheel being rotatably arranged on the test fixture body;

[0037] A driving column is fixedly arranged between the hand wheel and the second bevel gear.

[0038] Based on the above solution, a plurality of positioning springs are fixedly arranged between the positioning frame and the bottom of the first limiting groove.

[0039] On the basis of the above solution, the positioning block is adapted to the shape of the positioning groove.

[0040] Based on the above solution, a rubber pad is fixedly provided on the side wall of the positioning frame.

[0041] The working principle and beneficial effects of the utility model are as follows:

[0042] 1. In the present invention, by providing an electrical plug and an electrical slot, the electrical plug can be inserted into the electrical slot during testing to achieve electrical connection between the phase-to-ground short circuit monitoring and protection device and the test fixture. This avoids wiring and disconnecting operations during testing of the phase-to-ground short circuit monitoring and protection device, thereby improving testing efficiency.

[0043] 2. In the present invention, the positioning mechanism allows the positioning frame to be pushed into the second limiting groove by the positioning spring force after the positioning block is inserted into the positioning groove. The positioning frame and the second limiting groove cooperate to secure the electrical plug to the electrical socket, thereby preventing the electrical plug from becoming loose.

[0044] 3. In the present utility model, through the setting of the moving mechanism, the rotation of the hand wheel can drive the second bevel gear to rotate through the driving column, and at the same time, the meshing of the second bevel gear and the first bevel gear drives the first bevel gear and one of the first gears to rotate, and then the meshing of the first gear and the first annular rack drives the two first gears to rotate synchronously, and then the cam can be driven to rotate synchronously through the connecting rod. At the same time, the positioning frame is driven to move by the squeezing of the cam on the inner wall of the positioning frame, thereby facilitating the extraction of the positioning block from the positioning slot;

[0045] 4. In the utility model, through the arrangement of the positioning block, the electrical plug, the test tool body, the positioning groove, the electrical slot and the positioning mechanism, it is convenient to realize the installation and disassembly between the electrical plug and the electrical slot by rotating the hand wheel, and then realize the electrical connection between the phase-to-ground short-circuit monitoring protection device body and the phase-to-ground short-circuit monitoring protection device body and the test tool body through the cooperation between the electrical plug and the electrical slot, thereby solving the problem of low testing efficiency of the phase-to-ground short-circuit monitoring protection device in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0047] Figure 1 This is a schematic diagram of the structure of the utility model;

[0048] Figure 2 This is a schematic diagram of the structure of the test fixture body of the utility model;

[0049] Figure 3 This is a schematic cross-sectional view of the positioning mechanism of the present invention;

[0050] Figure 4 This is a schematic diagram of the cross-sectional structure of the test fixture body of the utility model;

[0051] Figure 5 This is a schematic diagram of the positioning mechanism structure of the utility model.

[0052] In the figure: 1. Phase-to-ground short-circuit monitoring and protection device body; 2. Positioning block; 3. Electrical plug; 4. Test fixture body; 5. Positioning slot; 6. Electrical slot; 7. Positioning frame; 8. Second limit slot; 9. Cam; 10. First gear; 11. Connecting rod; 12. Drive ring; 13. First bevel gear; 14. Second bevel gear; 15. Handwheel; 16. Drive column; 17. Positioning spring. DETAILED DESCRIPTION

[0053] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] like Figure 1-Figure 5 As shown, this embodiment proposes a phase-to-ground short-circuit monitoring and protection device test tool, which is used to detect the phase-to-ground short-circuit monitoring and protection device body 1, including a positioning block 2, an electric plug 3, a test tool body 4, a positioning groove 5, an electric slot 6 and a positioning mechanism. The positioning block 2 is fixedly set on the phase-to-ground short-circuit monitoring and protection device body 1, the electric plug 3 is fixedly set on the positioning block 2, the electric plug 3 is telecommunication-connected to the phase-to-ground short-circuit monitoring and protection device body 1, the test tool body 4 is set on one side of the phase-to-ground short-circuit monitoring and protection device body 1, the positioning groove 5 is opened on the test tool, the electric slot 6 is opened at the bottom of the positioning groove 5, the electric slot 6 is electrically connected to the test tool body 4, and the positioning mechanism is set in the positioning groove 5, for positioning between the positioning block 2 and the side wall of the positioning groove 5.

[0055] Reference Figure 2-Figure 5 The positioning mechanism includes a first limiting groove, a positioning frame 7, a second limiting groove 8 and a moving mechanism. The first limiting groove is provided on two opposite side walls of the positioning groove 5. The positioning frame 7 is slidably arranged in the first limiting groove. The second limiting groove 8 is provided on two opposite side walls of the positioning block 2. The moving mechanism is provided in the positioning frame 7 for controlling the movement of the positioning frame 7. The moving mechanism includes a cam 9, a first cavity and a rotating mechanism. The cam 9 is rotatably provided on the side wall of the first limiting groove. The cam 9 contacts the inner wall of the positioning frame 7. The first cavity is provided on one side of the first limiting groove. The rotating mechanism is provided in the first cavity for controlling the two cams 9 to rotate. The rotation mechanism includes a first gear 10, a connecting rod 11 and a synchronous rotation mechanism. Two first gears 10 are rotatably arranged in the first cavity. The connecting rod 11 is fixedly arranged between the first gear 10 and the cam 9. The synchronous rotation mechanism is arranged in the first cavity to control the two first gears 10 to rotate synchronously. The synchronous rotation mechanism includes a drive ring 12, a first annular rack and a drive mechanism. The drive ring 12 is rotatably arranged in the first cavity. The first annular rack is fixedly arranged on the inner wall of the drive ring 12. The first annular rack is engaged with the first gear 10. The drive mechanism is arranged on the test fixture body 4 to control the rotation of the first gear 10.

[0056] Specifically, the first gear 10 can be controlled to rotate through the operation of the driving mechanism, and the engagement of the first gear 10 with the first annular rack can drive the two first gears 10 to rotate synchronously. At the same time, during the synchronous rotation of the first gear 10, the cam 9 can be driven to rotate synchronously through the connecting rod 11, and the positioning frame 7 can be driven to move by squeezing the inner wall of the positioning frame 7 by the cam 9, thereby facilitating the positioning and unlocking of the positioning block 2.

[0057] Reference Figure 3-Figure 5 The driving mechanism includes a second cavity, a first bevel gear 13, a second bevel gear 14 and a driving assembly. The second cavity is opened on one side of the first cavity. The first bevel gear 13 is rotatably arranged on the side wall of the second cavity. A driving rod is fixedly arranged between the first bevel gear 13 and one of the first gears 10. The second bevel gear 14 is rotatably arranged on the side wall of the second cavity. The second bevel gear 14 is meshed with the first bevel gear 13. The driving assembly is arranged on the test fixture body 4 for controlling the rotation of the second bevel gear 14. The driving assembly includes a handwheel 15 and a driving column 16. The handwheel 15 is rotatably arranged on the test fixture body 4. The driving column 16 is fixedly arranged between the handwheel 15 and the second bevel gear 14. A plurality of positioning springs 17 are fixedly arranged between the positioning frame 7 and the bottom of the first limit groove. The positioning block 2 is adapted to the shape of the positioning groove 5, and a rubber pad is fixedly arranged on the side wall of the positioning frame 7.

[0058] Specifically, the operator rotates the handwheel 15, and the rotation of the handwheel 15 can drive the second bevel gear 14 to rotate through the driving column 16, and at the same time, the engagement of the second bevel gear 14 with the first bevel gear 13 drives the first bevel gear 13 and one of the first gears 10 to rotate. At the same time, after the positioning block 2 extends into the positioning groove 5, the operator can release the handwheel 15, so that the positioning frame 7 moves under the action of the positioning spring 17, so that the positioning frame 7 extends into the second limiting groove 8, thereby achieving the fixation of the electric plug 3 and the electric slot 6 through the cooperation between the positioning frame 7 and the second limiting groove 8, thereby preventing the electric plug 3 from loosening from the electric slot 6.

[0059] In this embodiment, when in use, the operator rotates the handwheel 15, and the rotation of the handwheel 15 can drive the second bevel gear 14 to rotate through the driving column 16, and at the same time, the engagement of the second bevel gear 14 with the first bevel gear 13 drives the first bevel gear 13 and one of the first gears 10 to rotate, and at the same time, the engagement of the first gear 10 with the first annular rack can drive the two first gears 10 to rotate synchronously. At the same time, during the synchronous rotation of the first gear 10, the cam 9 can be driven to rotate synchronously through the connecting rod 11, and the positioning frame is driven by the extrusion of the cam 9 on the inner wall of the positioning frame 7. 7 moves, and after the positioning frame 7 retracts into the first limiting groove, the operator extends the positioning block 2 into the positioning groove 5, and at the same time extends the electric plug 3 into the electric slot 6. Then the operator can release the handwheel 15, so that the positioning frame 7 moves under the action of the positioning spring 17, so that the positioning frame 7 extends into the second limiting groove 8, thereby achieving the fixation of the electric plug 3 and the electric slot 6 through the cooperation of the positioning frame 7 and the second limiting groove 8, thereby avoiding the electric plug 3 and the electric slot 6 from loosening. At this time, the phase-to-ground short circuit monitoring protection device body 1 can be tested by the test tool body 4.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test fixture for a phase-to-ground short-circuit monitoring and protection device, used for testing a phase-to-ground short-circuit monitoring and protection device body (1), characterized in that: include: A positioning block (2), the positioning block (2) being fixedly arranged on the phase-to-ground short circuit monitoring and protection device body (1); An electric plug (3), the electric plug (3) being fixedly arranged on the positioning block (2); A test fixture body (4), the test fixture body (4) being arranged on one side of the phase-to-ground short circuit monitoring and protection device body (1); A positioning groove (5), the positioning groove (5) being provided on the test fixture; An electrical slot (6), the electrical slot (6) being provided at the bottom of the positioning slot (5); A positioning mechanism is provided in the positioning groove (5) and is used for positioning the positioning block (2) and the side wall of the positioning groove (5).

2. The phase-to-ground short circuit monitoring and protection device test tool according to claim 1, characterized in that: The positioning mechanism comprises: a first limiting groove, the first limiting groove being formed on two opposite side walls of the positioning groove (5); A positioning frame (7), wherein the positioning frame (7) is slidably arranged in the first limiting groove; A second limiting groove (8), the second limiting groove (8) being provided on two opposite side walls of the positioning block (2); A moving mechanism is provided in the positioning frame (7) and is used to control the positioning frame (7) to move.

3. The phase-to-ground short circuit monitoring and protection device test tool according to claim 2, characterized in that: The moving mechanism comprises: A cam (9), the cam (9) being rotatably disposed on a side wall of the first limiting groove, the cam (9) being in contact with an inner wall of the positioning frame (7); a first cavity, the first cavity being opened on one side of the first limiting groove; A rotating mechanism is provided in the first cavity and is used to control the two cams (9) to rotate.

4. The phase-to-ground short circuit monitoring and protection device test tool according to claim 3, characterized in that: The rotating mechanism comprises: a first gear (10), two first gears (10) being rotatably disposed in the first cavity; a connecting rod (11), the connecting rod (11) being fixedly arranged between the first gear (10) and the cam (9); A synchronous rotation mechanism is provided in the first cavity and is used to control the two first gears (10) to rotate synchronously.

5. The phase-to-ground short circuit monitoring and protection device test tool according to claim 4, characterized in that: The synchronous rotation mechanism comprises: a drive ring (12), the drive ring (12) being rotatably disposed in the first cavity; a first annular rack, the first annular rack being fixedly arranged on the inner wall of the drive ring (12), and the first annular rack being meshed with the first gear (10); A driving mechanism is provided on the test fixture body (4) and is used to control the first gear (10) to rotate.

6. The phase-to-ground short circuit monitoring and protection device test tool according to claim 5, characterized in that: The driving mechanism comprises: a second cavity, the second cavity being opened on one side of the first cavity; a first bevel gear (13), the first bevel gear (13) being rotatably disposed on a side wall of the second cavity, and a driving rod being fixedly disposed between the first bevel gear (13) and one of the first gears (10); a second bevel gear (14), the second bevel gear (14) being rotatably disposed on a side wall of the second cavity, the second bevel gear (14) being meshed with the first bevel gear (13); A drive assembly is provided on the test fixture body (4) and is used to control the second bevel gear (14) to rotate.

7. The phase-to-ground short circuit monitoring and protection device test tool according to claim 6, characterized in that: The drive assembly includes: a handwheel (15), the handwheel (15) being rotatably disposed on the test fixture body (4); A drive column (16), wherein the drive column (16) is fixedly arranged between the hand wheel (15) and the second bevel gear (14).

8. The phase-to-ground short circuit monitoring and protection device test tool according to claim 7, characterized in that: A plurality of positioning springs (17) are fixedly arranged between the positioning frame (7) and the bottom of the first limiting groove.

9. The phase-to-ground short circuit monitoring and protection device test tool according to claim 8, characterized in that: The positioning block (2) is adapted to the positioning groove (5) in shape.

10. The phase-to-ground short circuit monitoring and protection device test tool according to claim 9, characterized in that: A rubber pad is fixedly provided on the side wall of the positioning frame (7).

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