Three-phase relay protection tester protection device

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to a protection device for a three-phase relay protection tester. The present disclosure. In the present disclosure, a base box is fixedly connected to the bottom of the three-phase relay protection tester, and top plates are fixedly installed on both sides of the top of the base box through a buffer mechanism. The bottom of the top plate fits the top of the three-phase relay protection tester, and a plurality of test power ports are arranged on one side of the three-phase relay protection tester. In the present invention, when the top plate and the bottom three-phase relay protection tester are moved by pulling the handle, and the base box vibrates during the movement, the base box can drive the surrounding buffer rods to move, and the movement of the buffer rods can drive the top mounting plate to move, and the movement of the mounting plate can drive the bottom telescopic rod to extend, and the extension of the telescopic rod can pull the second spring of the outer wall, and the second spring can use its own elastic force to absorb the shaking of the base box and the three-phase relay protection tester, thereby improving the impact resistance during portable transportation.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power, and particularly relates to a protection device for a three-phase relay protection tester. Background Art

[0002] In the field of electric power, a protection tester is required to test electric power equipment or circuits. It can test various traditional relays and protection devices, and can also conduct various tests on modern microcomputer protections, thereby realizing functions such as line protection, main transformer differential protection, and excitation control of the power system. It is an important test tool to ensure the safe and reliable operation of the power system. In related technologies, the connection cables of the protection tester lack restraint, which easily causes the cables to be entangled during wiring, affecting the normal use of the instrument and easily leading to electrical accidents such as line failures. Summary of the Invention

[0003] To overcome the problems existing in related technologies, a protection device for a three-phase relay protection tester is provided.

[0004] According to an aspect of an embodiment of the present disclosure, a protection device for a three-phase relay protection tester is provided. The device includes: a base box, a buffer mechanism, and a top plate. The buffer mechanism includes a plurality of buffer rods, a plurality of mounting plates, a plurality of telescopic rods, and a plurality of second springs;

[0005] The bottom end of each buffer rod is fixedly connected to the upper surface of the base box. The top plate is provided with a plurality of through holes. Each buffer rod passes through a through hole and is slidably connected to the passed through hole. The top ends of every two adjacent buffer rods are fixedly connected to a mounting plate. The top end of each second spring is fixedly connected to the bottom end of a mounting plate. The bottom end of each second spring is fixedly connected to the top end of a telescopic rod. The bottom end of each telescopic rod is fixedly connected to the top plate. The bottom end of the three-phase relay protection tester is fixedly connected to the upper surface of the base box. The top end of the three-phase relay protection tester is fixedly connected to the lower surface of the top plate. A handle is provided at the top end of the top plate;

[0006] When pulling the handle to move the protection device of the three-phase relay protection tester, the handle drives the top plate to move together with the three-phase relay protection tester. If the base box generates vibration during movement, the base box drives each buffer rod together with the mounting plate to vibrate, and each second spring can use its own elastic force to absorb the vibration from the base box.

[0007] In a possible implementation manner, the buffer mechanism further includes: a plurality of buffer sleeves;

[0008] Each buffer sleeve is made of flexible plastic. Among the buffer rods on the side of the three-phase relay protection tester, a plurality of buffer sleeves are sleeved outside every two adjacent buffer rods to form a buffer for the side of the three-phase relay protection tester.

[0009] In a possible implementation, the device further includes a light-shielding component. The light-shielding component includes a light-shielding cover and a closed sleeve. The closed sleeve is fixedly connected around the display screen of the three-phase relay protection tester. The light-shielding cover is cylindrical. One end of the light-shielding cover is fixedly connected to the closed sleeve, so that the side walls around the light-shielding cover surround the display screen.

[0010] In a possible implementation, a sliding groove is formed on one side of the closed sleeve. A slider is slidably connected in the inner cavity of the sliding groove. One end of the cleaning scraper is fixedly connected to the slider. One side of the cleaning scraper is attached to one side of the display screen. The cleaning scraper is a flexible plastic plate, and the width of the cleaning scraper is equal to the width of the display screen.

[0011] When pulling the slider on one side of the cleaning scraper, the slider slides in the sliding groove and drives the cleaning scraper to scrape and remove dust from the screen.

[0012] In a possible implementation, the width of the cross-section of the side wall of the light-shielding cover gradually decreases from near the display screen to far from the display screen.

[0013] In a possible implementation, the device further includes a lead wire mechanism. The lead wire mechanism includes a protective sleeve, two fixing plates, a sliding rod, and a guiding screw. The protective sleeve is fixedly arranged around the test power connection port of the three-phase relay protection tester. Fixing plates are fixedly connected to both ends of the protective sleeve. A guiding screw is axially connected between the two fixing plates. The sliding rod is located below the guiding screw. A sliding rod is fixedly connected between the two fixing plates. The sliding rod is located below the guiding screw. A sliding sleeve is sleeved on the outer side wall of the sliding rod. A limiting sleeve is fixedly connected to the top of the sliding sleeve. The limiting sleeve is located at the bottom of the guiding screw, and the cross-sectional shape of the limiting sleeve is arc-shaped, which is used to squeeze and limit the cable in the thread of the guiding screw.

[0014] In a possible implementation, two guiding rods are fixedly connected to one end of the bottom of the limiting sleeve. A guiding block is slidably sleeved on the outer side wall of each guiding rod. An extrusion sleeve is fixedly connected between the two guiding blocks. The cross-sectional shape of the extrusion sleeve is arc-shaped. The extrusion sleeve is sleeved outside the sliding rod. A first spring is sleeved on the outer side wall of each guiding rod at a position below the guiding block. A connecting plate is fixedly connected between the bottom ends of the two guiding rods. One end of each first spring is fixedly connected to the bottom of the guiding block, and the other end of each first spring is fixedly connected to the top of the connecting plate.

[0015] The beneficial effects of the present invention are as follows: in the present invention, when the handle is pulled to drive the top plate and the bottom three-phase relay protection tester to move, when the base box vibrates during the movement, the base box can drive the surrounding buffer rods to move, and the movement of the buffer rods can drive the top mounting plate to move, and the movement of the mounting plate can drive the bottom telescopic rod to extend, and the extension of the telescopic rod can pull the second spring of the outer wall, and the second spring can use its own elastic force to absorb the shaking of the base box and the three-phase relay protection tester, thereby improving the impact resistance during portable transportation, and through the arrangement of the base box and the top plate, when contacting the external collision position, the base box and the top plate can first contact the impact surface, thereby improving the transportation and movement stability of the three-phase relay protection tester, meeting the use needs, and when the base box moves, it can squeeze the external buffer cover at the same time, the buffer cover can absorb external impact, and the buffer cover can prevent the external impact from being transmitted to the side of the three-phase relay protection tester, further improving the protection capability.

[0016] Through the designed shading component, the shading hood can prevent external light from invading the screen on one side of the three-phase relay protection tester, and the conical shading hood can avoid interfering with the screen. At the same time, through the designed cleaning scraper, when the slider on one side of the cleaning scraper is pulled, the slider can slide in the sliding groove to scrape and remove dust from the screen, and the cleaning scraper is a flexible plate, which can ensure the fit with the screen.

[0017] In addition, when testing, the wiring cable can be connected to the test power port on one side of the three-phase relay protection tester, and the cable can be wrapped around the outside of the guide screw at the corresponding position, and the guide screw can reduce the difficulty of cable arrangement and extension by wrapping, thereby improving the cable arrangement efficiency, and through the designed limit sleeve, when the limit sleeve is squeezed with the top cable, the limiting stability of the limit sleeve on the cable can be guaranteed, and through the designed extrusion sleeve, the bottom extrusion sleeve can be pulled to drive the guide blocks on both sides to slide outside the guide rod, so that after the limit sleeve moves through the bottom sliding sleeve, the position of the limit sleeve and the sliding sleeve can be quickly limited through the extrusion limit of the extrusion sleeve and the sliding rod, and the guide block can squeeze the first spring on one side while moving, and the first spring can use its own elastic force to absorb the moving shaking stress of the limit sleeve, thereby improving the fixing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a three-dimensional diagram of a three-phase relay protection tester according to an exemplary embodiment.

[0019] Figure 2 The figure is a three-dimensional diagram of a three-phase relay protection tester according to an exemplary embodiment.

[0020] Figure 3 The figure is an exploded diagram of a three-phase relay protection tester according to an exemplary embodiment.

[0021] Figure 4 It is a partial schematic diagram of a three - phase relay protection tester shown according to an exemplary embodiment.

[0022] Figure 5 It is a partial schematic diagram of a three - phase relay protection tester shown according to an exemplary embodiment.

[0023] In the figure:

[0024] 1. Three - phase relay protection tester; 2. Light - shielding component; 201. Light - shielding cover; 202. Enclosing sleeve;

[0025] 203. Cleaning scraper; 204. Sliding groove; 3. Test power connection port; 4. Lead mechanism;

[0026] 401. Protective sleeve; 402. Fixed plate; 403. Slide bar; 404. Guide screw; 405. Limit sleeve;

[0027] 406. Guide rod; 407. Guide block; 408. Extrusion sleeve; 409. First spring;

[0028] 410. Connecting plate; 411. Slide sleeve; 5. Buffer mechanism; 501. Buffer rod; 502. Mounting plate;

[0029] 503. Telescopic rod; 504. Second spring; 505. Buffer sleeve; 6. Handle; 7. Top plate;

[0030] 8. Base box. Detailed implementation manners

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 It is a three - dimensional view of a three - phase relay protection tester shown according to an exemplary embodiment, Figure 2 It is a three - dimensional view of a three - phase relay protection tester shown according to an exemplary embodiment, Figure 3 It is an exploded view of a three - phase relay protection tester shown according to an exemplary embodiment, as Figures 1 to 3As shown in the figure, the protection device of the three-phase relay protection tester includes: a base box 8, a buffer mechanism 5 and a top plate 7. The buffer mechanism 5 includes a plurality of buffer rods 501, a plurality of mounting plates 502, a plurality of telescopic rods 503 and a plurality of second springs 504. The bottom end of each buffer rod 501 is fixedly connected to the upper surface of the base box 8. The top plate 7 is provided with a plurality of through holes. Each buffer rod 501 passes through a through hole and is slidably connected to the passed through hole. The top ends of every two buffer rods 501 are fixedly connected to a mounting plate 502. The top end of each second spring 504 is fixedly connected to the bottom end of a mounting plate 502. The bottom end of each second spring 504 is fixedly connected to the top end of a telescopic rod 503. The bottom end of each telescopic rod 503 is fixedly connected to the top plate 7. The bottom end of the three-phase relay protection tester is fixedly connected to the upper surface of the base box 8, and the top end of the three-phase relay protection tester is fixedly connected to the lower surface of the top plate 7. A handle is provided at the top end of the top plate 7;

[0033] When pulling the handle to move the protection device of the three-phase relay protection tester, the handle drives the top plate 7 to move together with the three-phase relay protection tester. If the base box 8 vibrates during the movement, the base box 8 drives each buffer rod 501 together with the mounting plate 502 to vibrate. Each second spring 504 can use its own elastic force to absorb the vibration from the base box 8, improving the anti-impact ability during the portable transportation process. And through the settings of the base box 8 and the top plate 7, when contacting the external collision position, the base box 8 and the top plate 7 can first contact the impact surface, thereby improving the transportation and movement stability of the three-phase relay protection tester, meeting the use requirements. And when the base box 8 moves, it can simultaneously squeeze the external buffer sleeve 505. The buffer sleeve 505 can absorb the external impact, and the buffer sleeve 505 can prevent the external impact from being conducted to the side of the three-phase relay protection tester 1, further improving the protection ability.

[0034] The light-shielding component 2 includes a light-shielding cover 201 and a closed sleeve 202. The closed sleeve 202 is fixedly connected around the display screen of the three-phase relay protection tester 1. The light-shielding cover 201 is in a cylindrical shape. One end of the light-shielding cover 201 is fixedly connected to the closed sleeve 202, so that the peripheral side walls of the light-shielding cover 201 surround the periphery of the display screen. One side of the closed sleeve 202 is provided with a sliding groove 204. A slider is slidably connected in the inner cavity of the sliding groove 204. One side of the slider is fixedly connected to one end of a cleaning scraper 203. One side of the cleaning scraper 203 is in contact with one side of the screen of the three-phase relay protection tester 1. The cleaning scraper 203 is a flexible plastic plate, and the width of the cleaning scraper 203 is equal to the width of the display screen. When pulling the slider on one side of the cleaning scraper 203, the slider slides in the sliding groove 204 and drives the cleaning scraper 203 to scrape and remove dust from the screen.

[0035] In a possible implementation, the width of the cross-section of the side wall of the light-shielding cover gradually decreases from near the display screen to far from the display screen.

[0036] In the present disclosure, through the designed light-shielding component 2, the light-shielding cover 201 can prevent external light from invading the screen side of the three-phase relay protection tester 1, and the light-shielding cover 201 with an approximately triangular cross-section can avoid interfering with the screen. At the same time, through the designed cleaning squeegee 203, when pulling the slider on one side of the cleaning squeegee 203, the slider slides along the sliding groove 204 and drives the cleaning squeegee 203 to scrape and remove dust from the screen, and the cleaning squeegee 203 is a flexible plate, which can ensure the fitting effect with the screen.

[0037] The lead mechanism 4 includes a protective sleeve 401, two fixing plates 402, a sliding rod 403, and a guiding screw 404. The protective sleeve 401 is fixedly arranged around the test power connection port 3 of the three-phase relay protection tester 1. Both ends of the protective sleeve 401 are fixedly connected to the fixing plates 402. The two ends of the guiding screw 404 are respectively axially connected to the fixing plates 402. The sliding rod 403 is located below the guiding screw 404. Both ends of the sliding rod 403 are fixedly connected to the fixing plates 402. A sliding rod 403 is fixedly connected therebetween. The sliding rod 403 is located below the guiding screw 404. A sliding sleeve 411 is sleeved on the outer side wall of the sliding rod 403. Through the designed sliding rod 403 and sliding sleeve 411, the sliding sleeve 411 is more stable by sliding outside the sliding rod 403 and can avoid axial deviation. The top of the sliding sleeve 411 is fixedly connected to a limiting sleeve 405. The limiting sleeve 405 is located at the bottom of the guiding screw 404, and the cross-sectional shape of the limiting sleeve 405 is arc-shaped, which is used to squeeze and limit the cable in the thread of the guiding screw 404. One end of the bottom of the limiting sleeve 405 is fixedly connected to two guiding rods 406. A guiding block 407 is sleeved and slidably connected on the outer side wall of each guiding rod 406. An extrusion sleeve 408 is fixedly connected between the two guiding blocks 407. The cross-sectional shape of the extrusion sleeve 408 is arc-shaped. The extrusion sleeve 408 is sleeved outside the sliding rod 403. A first spring 409 is sleeved on the outer side wall of each guiding rod 406 at a position below the guiding block 407, and a connecting plate 410 is fixedly connected between the bottoms of the two guiding rods 406. One end of each first spring 409 is fixedly connected to the bottom of the guiding block 407, and the other end of each first spring 409 is fixedly connected to the top of the connecting plate 410.

[0038] When testing, connect the connection end of the wiring cable to the test power connection port 3 on one side of the three-phase relay protection tester 1, and wind the cable around the thread outside the guiding screw rod 404. The guiding screw rod 404 can reduce the difficulty of cable layout extension through winding, improve the cable layout efficiency, and through the designed limit sleeve 405, when the limit sleeve 405 is squeezed against the top cable, it can ensure the limit stability of the limit sleeve 405 for the cable. And through the designed extrusion sleeve 408, it can pull the bottom extrusion sleeve 408 to drive the two side guiding blocks 407 to slide outside the guiding rod 406. Thus, after the limit sleeve 405 moves through the bottom sliding sleeve 411, through the extrusion limit between the extrusion sleeve 408 and the sliding rod 403, the positions of the limit sleeve 405 and the sliding sleeve 411 can be quickly limited. While the guiding block 407 moves, it can squeeze one side of the first spring 409, and the first spring 409 can utilize its own elastic force to absorb the moving shaking stress of the limit sleeve 405, improving the fixing stability.

[0039] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A protection device for a three-phase relay protection tester, characterized in that, The device includes: a base box, a buffer mechanism and a top plate. The buffer mechanism includes a plurality of buffer rods, a plurality of mounting plates, a plurality of telescopic rods and a plurality of second springs; The bottom end of each buffer rod is fixedly connected to the upper surface of the base box. The top plate is provided with a plurality of through holes. Each buffer rod passes through a through hole and is slidably connected to the passed through hole. One mounting plate is fixedly connected to the top ends of every two adjacent buffer rods. The top end of each second spring is fixedly connected to the bottom end of a mounting plate. The bottom end of each second spring is fixedly connected to the top end of a telescopic rod. The bottom end of each telescopic rod is fixedly connected to the top plate. The bottom end of the three-phase relay protection tester is fixedly connected to the upper surface of the base box. The top end of the three-phase relay protection tester is fixedly connected to the lower surface of the top plate. A handle is arranged at the top end of the top plate; When pulling the handle to move the three-phase relay protection tester protection device, the handle drives the top plate to move together with the three-phase relay protection tester. If the base box vibrates during the movement, the base box drives each buffer rod together with the mounting plate to vibrate. Each second spring can absorb the vibration from the base box by its own elastic force; The device further includes a lead wire mechanism; the lead wire mechanism includes a protective sleeve, two fixing plates, a sliding rod and a guiding screw. The protective sleeve is fixedly arranged around the test power connection port of the three-phase relay protection tester. Fixing plates are fixedly connected to both ends of the protective sleeve. A guiding screw is axially connected between the two fixing plates. The sliding rod is located below the guiding screw. A sliding rod is fixedly connected between the two fixing plates. The sliding rod is located below the guiding screw. A sliding sleeve is sleeved on the outer side wall of the sliding rod. A limiting sleeve is fixedly connected to the top of the sliding sleeve. The limiting sleeve is located at the bottom of the guiding screw, and the cross-sectional shape of the limiting sleeve is arc-shaped, which is used to squeeze and limit the cable in the thread of the guiding screw.

2. The device according to claim 1, characterized in that, The buffer mechanism further includes: a plurality of buffer sleeves; Each buffer sleeve is supported by flexible plastic. Among the buffer rods on the side of the three-phase relay protection tester, a plurality of buffer sleeves are sleeved outside every two adjacent buffer rods to form a buffer for the side of the three-phase relay protection tester.

3. The device according to claim 1, characterized in that, The device further includes a light-shielding component. The light-shielding component includes a light-shielding cover and a closed sleeve. The closed sleeve is fixedly connected around the display screen of the three-phase relay protection tester. The light-shielding cover is cylindrical. One end of the light-shielding cover is fixedly connected to the closed sleeve, so that the side walls around the light-shielding cover surround the display screen.

4. The device according to claim 3, characterized in that, A sliding groove is opened on one side of the closed sleeve. A slider is slidably connected in the inner cavity of the sliding groove. One end of a cleaning scraper is also fixedly connected to the slider. One side of the cleaning scraper is attached to one side of the display screen. The cleaning scraper is a flexible plastic plate, and the width of the cleaning scraper is equal to the width of the display screen; When pulling the slider on one side of the cleaning scraper, the slider slides in the sliding groove and drives the cleaning scraper to scrape and remove dust from the screen.

5. The device according to claim 3, characterized in that, The width of the cross-section of the side wall of the light-shielding cover gradually becomes smaller from the side close to the display screen to the side far from the display screen.

6. The device according to claim 1, characterized in that One end of the bottom of the limit sleeve is fixedly connected with two guide rods. A guide block is sleeved and slidably connected to the outer side wall of each guide rod. An extrusion sleeve is fixedly connected between the two guide blocks. The cross-sectional shape of the extrusion sleeve is arc-shaped. The extrusion sleeve is sleeved outside the sliding rod. A first spring is sleeved on the outer side wall of each guide rod at a position below the guide block. A connecting plate is fixedly connected between the bottom ends of the two guide rods. One end of each first spring is fixedly connected to the bottom of the guide block, and the other end of each first spring is fixedly connected to the top of the connecting plate.

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