End screen grounding state detection device for high-voltage bushing

Abstract

The invention discloses an end screen grounding state detection device for a high-voltage bushing, and relates to the technical field of high-voltage bushing end screen detection, the end screen grounding state detection device comprises a bottom plate, an end screen placing mechanism, an open circuit detection mechanism and a grounding detection mechanism, the open circuit detection mechanism comprises a push ring, and the push ring is arranged at the right end of the upper part of the bottom plate; a copper sleeve in the end screen is pushed through the push ring, the grounding detection mechanism comprises a conductive ring, and the conductive ring is arranged at one end, close to the push ring, of the end screen placing groove and is connected with the bottom end of the copper sleeve in the end screen through the conductive ring. According to the invention, the copper sleeve is pushed through the push ring, and then the conductive clamping plate is driven to rotate through the conductive plate, so that the conductive clamping plate stably clamps the lead column, a detection instrument can detect the state of the end screen after the copper sleeve and the grounding base are disconnected, and a detector does not need to manually push the copper sleeve and insert a pin. And the detection efficiency of the end screen grounding state is improved.

Description

Technical Field

[0001] This invention relates to the field of high-voltage bushing end-screen detection technology, specifically to a device for detecting the grounding status of the end-screen of a high-voltage bushing. Background Technology

[0002] The final screen of a high-voltage bushing refers to the end of the capacitance between the conductive rod and ground in the bushing. It is a small grounding bushing, usually located at the flange connecting the bushing and the oil tank. The final screen must be grounded during operation to ensure the electrical insulation performance and safe and stable operation of the bushing. As the last screen, the final screen plays a crucial role in operation. By being equipotentially connected to ground, it can effectively protect the capacitor core and make the electric field on the surface of the outer insulating porcelain bushing evenly distributed due to the equalizing effect of the internal capacitor core, thereby improving the electrical insulation performance of the bushing. Therefore, after the final screen of the high-voltage bushing is manufactured, its grounding status needs to be tested. During the testing of the grounding status of the final screen of the high-voltage bushing, when the final screen is grounded normally, the built-in spring pushes the outer copper sleeve to ground with the grounding base. However, when testing the insulation, the copper sleeve needs to be pushed in and locked with a pin to disconnect it from the ground. After the measurement, when restoring the grounding, it is necessary to confirm that the copper sleeve pops out and resets, and to use a multimeter to confirm that the grounding is good. Therefore, when testing the insulation in the grounding status of the final screen, the tester must first push the copper sleeve in and then insert the pin before finally connecting the wires. Because the spring force is usually large in the final screen to ensure a stable connection between the copper sleeve and the grounding base, the copper sleeve is often difficult to push in, causing inconvenience in the test. Summary of the Invention

[0003] The purpose of this invention is to provide a device for detecting the grounding status of the end screen of a high-voltage bushing, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting the grounding status of the end screen of a high-voltage bushing, comprising a base plate, wherein a detection instrument is provided at the middle of the front side of the top of the base plate, and further comprising an end screen placement mechanism, a circuit breaker detection mechanism and a grounding detection mechanism; The end screen placement mechanism includes an end screen placement slot, which is located above the middle of the base plate, through which the end screen of the high-voltage bushing is placed. A circuit breaker detection mechanism, comprising a push ring disposed at the upper right end of the base plate, which pushes the copper sleeve in the end screen. A grounding detection mechanism, comprising a conductive ring, wherein the conductive ring is disposed at one end of the end screen placement slot near the push ring, and is connected to the bottom end of the copper sleeve in the end screen via the conductive ring.

[0005] Preferably, the end screen placement mechanism includes a first support base, a connecting frame, and a terminal block. The first support base is fixedly installed on the left end of the base plate, the connecting frame is fixedly installed on the top of the first support base, the end screen placement slot is fixedly installed on the side wall of the connecting frame near the middle of the base plate, and the terminal block is fixedly installed on the middle of the side of the end screen placement slot near the connecting frame. The terminal block is electrically connected to the detection instrument via a wire.

[0006] Preferably, the circuit breaker detection mechanism includes a second support base, a movable slot, and a translational base. The second support base is fixedly installed at the right end of the base plate, the movable slot is opened in the middle of the second support base, and the translational base is movably installed in the movable slot.

[0007] Preferably, the circuit breaker detection mechanism includes a push plate, an electric push rod, and a support frame. The push plate is fixedly installed on the bottom end of the translation seat near the end screen placement slot. The electric push rod is fixedly installed on the right side wall of the second support seat. The output shaft of the electric push rod is fixedly connected to the push plate. The support frame is fixedly installed on the top end of the translation seat.

[0008] Preferably, the circuit breaker detection mechanism includes a cylindrical frame, a right-angle frame, and conductive clamps. The cylindrical frame is fixedly installed on the top of the support frame near the end screen placement slot. The push ring is fixedly installed on the end of the cylindrical frame away from the support frame. There are two sets of right-angle frames, which are fixedly installed on the upper and lower sides of the cylindrical frame near the support frame, respectively. There are two conductive clamps, which are movably installed on the ends of the two sets of right-angle frames near the push ring, respectively.

[0009] Preferably, the circuit breaker detection mechanism includes a conductive plate, a hollow rod, and a first spring. The conductive plate is movably disposed inside the cylindrical frame. The hollow rod is inserted and installed in the middle of one end of the cylindrical frame near the support frame. The end of the hollow rod away from the support frame is fixedly connected to the middle of the conductive plate. The conductive plate is electrically connected to the detection instrument through a wire, and the wire passes through the hollow rod. The first spring is movably sleeved on the hollow rod and is located between the cylindrical frame and the conductive plate.

[0010] Preferably, the grounding detection mechanism includes a terminal block, a lifting rod, and a second spring. The terminal block is movably installed at one end of the end screen placement slot near the push ring, and its top end is fixedly installed at the middle of the bottom end of the conductive ring. The terminal block is electrically connected to the detection instrument via a wire. There are two lifting rods, both fixedly installed at one end of the end screen placement slot near the push ring, located on both sides of the terminal block, and their top ends are fixedly connected to the conductive ring. Both lifting rods are inserted into the top of the second support base. There are two second springs, each sleeved on one of the two lifting rods, located between the end screen placement slot and the second support base.

[0011] Preferably, the grounding detection mechanism includes a U-shaped rod and a lower pressure plate. The two ends of the U-shaped rod are fixedly installed at the bottom ends of two lifting rods, and the lower pressure plate is fixedly installed at the bottom end of the translation seat, with the end away from the translation seat located between the U-shaped rod and the second support seat.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention designs and installs a final screen placement mechanism, a circuit breaker detection mechanism, and a grounding detection mechanism. By placing the final screen in the final screen placement slot, the terminal of the final screen is connected to the terminal block, and the conductive ring is connected to the copper sleeve in the final screen. This allows the detection instrument to quickly detect the grounding status of the final screen during normal operation. By driving the translation seat to move, the conductive ring descends. During the movement of the cylinder frame, the push ring pushes the copper sleeve, and then the conductive plate drives the conductive clamp to rotate, so that the conductive clamp stably clamps the lead post. This allows the detection instrument to detect the state of the final screen after the copper sleeve is disconnected from the grounding base. This eliminates the need for the testing personnel to manually push in the copper sleeve and insert the pin, thus improving the detection efficiency of the final screen's grounding status. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure is provided for embodiments of the present invention; Figure 2 This is a schematic diagram of the end-screen placement mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a circuit breaker detection mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the cylinder frame and push ring provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the tube frame provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the grounding detection mechanism provided in an embodiment of the present invention.

[0014] In the diagram: 1. Base plate; 2. Detection instrument; 3. End screen placement mechanism; 301. First support seat; 302. Connecting frame; 303. End screen placement slot; 304. Terminal block; 4. Circuit breaker detection mechanism; 401. Second support seat; 402. Movable slot; 403. Translation seat; 404. Push plate; 405. Electric push rod; 406. Support frame; 407. Cylindrical frame; 408. Push ring; 409. Right angle frame; 410. Conductive clamp; 411. Conductive plate; 412. Hollow rod; 413. First spring; 5. Grounding detection mechanism; 501. Conductive ring; 502. Terminal block; 503. Lifting rod; 504. Second spring; 505. U-shaped rod; 506. Lower pressure plate. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] This embodiment provides a device for detecting the grounding status of the end screen of a high-voltage bushing, such as... Figures 1 to 6 As shown, it includes a base plate 1, a detection instrument 2 is provided at the middle of the front side of the top of the base plate 1, and also includes a screen placement mechanism 3, a circuit breaker detection mechanism 4 and a grounding detection mechanism 5. The end screen placement mechanism 3 includes an end screen placement slot 303, which is located in the upper middle part of the base plate 1. The end screen of the high-voltage bushing is placed through the end screen placement slot 303.

[0017] In this embodiment, as Figure 2 As shown, the end screen placement mechanism 3 includes a first support base 301, a connecting frame 302, and a terminal block 304. The first support base 301 is fixedly installed on the left end of the base plate 1, the connecting frame 302 is fixedly installed on the top of the first support base 301, the end screen placement slot 303 is fixedly installed on the side wall of the connecting frame 302 near the middle of the base plate 1, and the terminal block 304 is fixedly installed on the middle of the side of the end screen placement slot 303 near the connecting frame 302. The terminal block 304 is electrically connected to the detection instrument 2 through a wire. By placing the end screen of the high-voltage bushing into the end screen placement slot 303, the wiring terminals of the end screen are made to contact and conduct with the terminal block 304 after placement.

[0018] At other levels, this embodiment also provides a circuit breaker detection mechanism 4 for detecting the state after the copper sleeve in the end screen is disconnected from the grounding base, such as... Figures 3 to 5 As shown, the circuit breaker detection mechanism 4 includes a push ring 408, which is located on the upper right end of the base plate 1. The push ring 408 pushes the copper sleeve in the end screen.

[0019] In this embodiment, as Figure 3 As shown, the circuit breaker detection mechanism 4 includes a second support base 401, a movable slot 402, and a sliding seat 403. The second support base 401 is fixedly installed at the right end of the base plate 1, the movable slot 402 is opened in the middle of the second support base 401, and the sliding seat 403 is movably installed in the movable slot 402. The pusher 404 is pushed by the electric push rod 405 to move closer to the end screen placement slot 303, and the pusher 404 drives the translation seat 403 to move in the movable slot 402.

[0020] In this embodiment, as Figure 3As shown, the circuit breaker detection mechanism 4 includes a push plate 404, an electric push rod 405, and a support frame 406. The push plate 404 is fixedly installed on the bottom end of the translation seat 403 near the end screen placement slot 303. The electric push rod 405 is fixedly installed on the right side wall of the second support seat 401. The output shaft of the electric push rod 405 is fixedly connected to the push plate 404. The support frame 406 is fixedly installed on the top end of the translation seat 403. The push plate 404 drives the translation seat 403 to move within the movable groove 402, causing the lower pressure plate 506 to move simultaneously with the translation seat 403.

[0021] In this embodiment, as Figures 3 to 5 As shown, the circuit breaker detection mechanism 4 includes a cylindrical frame 407, a right-angle frame 409, and a conductive clamping plate 410. The cylindrical frame 407 is fixedly installed on the top of the support frame 406 near the end screen placement slot 303. The push ring 408 is fixedly installed on the end of the cylindrical frame 407 away from the support frame 406. There are two sets of right-angle frames 409, which are fixedly installed on the upper and lower sides of the cylindrical frame 407 near the support frame 406, respectively. There are two conductive clamping plates 410, which are movably installed on the ends of the two sets of right-angle frames 409 near the push ring 408, respectively. The support frame 406 drives the cylinder frame 407 to move closer to the end screen, and the cylinder frame 407 drives the push ring 408 to move simultaneously. When the push ring 408 contacts the copper sleeve, it pushes the copper sleeve, causing the copper sleeve to disconnect from the grounding base.

[0022] In this embodiment, as Figure 5 As shown, the circuit breaker detection mechanism 4 includes a conductive plate 411, a hollow rod 412, and a first spring 413. The conductive plate 411 is movably disposed inside the cylindrical frame 407. The hollow rod 412 is inserted and installed in the middle of one end of the cylindrical frame 407 near the support frame 406. The end of the hollow rod 412 away from the support frame 406 is fixedly connected to the middle of the conductive plate 411. The conductive plate 411 is electrically connected to the detection instrument 2 through a wire, and the wire passes through the hollow rod 412. The first spring 413 is movably sleeved on the hollow rod 412 and is located between the cylindrical frame 407 and the conductive plate 411. As the cylinder frame 407 moves, the distance between the conductive plate 411 and the support frame 406 continuously decreases due to the obstruction of the lead post. When the conductive plate 411 contacts the conductive clamp 410, it drives the conductive clamp 410 to rotate, causing the two conductive clamps 410 to clamp onto the lead post. At this time, the conductive clamp 410 can stably clamp the lead post, and through the connection between the conductive clamp 410 and the conductive plate 411 and the lead post, the detection instrument 2 can detect the state of the end screen after the copper sleeve and the grounding base are disconnected.

[0023] In other aspects, this embodiment also provides a grounding detection mechanism 5 for detecting the normal connection status between the copper sleeve and the grounding base in the end screen, such as... Figure 6 As shown, the grounding detection mechanism 5 includes a conductive ring 501, which is disposed at one end of the end screen placement groove 303 near the push ring 408 and is connected to the bottom end of the copper sleeve in the end screen.

[0024] In this embodiment, as Figure 6 As shown, the grounding detection mechanism 5 includes a terminal block 502, a lifting rod 503, and a second spring 504. The terminal block 502 is movably installed at one end of the end screen placement slot 303 near the push ring 408, and its top end is fixedly installed at the middle of the bottom end of the conductive ring 501. The terminal block 502 is electrically connected to the detection instrument 2 through a wire. There are two lifting rods 503, both of which are fixedly installed at one end of the end screen placement slot 303 near the push ring 408, and are located on both sides of the terminal block 502. The top ends of both are fixedly connected to the conductive ring 501. Both lifting rods 503 are inserted into the top end of the second support base 401. There are two second springs 504, which are respectively sleeved on the two lifting rods 503 and are located between the end screen placement slot 303 and the second support base 401. The lifting rod 503 drives the conductive ring 501 to descend, so that the conductive ring 501 is not connected to the copper sleeve in the end screen.

[0025] In this embodiment, as Figure 6 As shown, the grounding detection mechanism 5 includes a U-shaped rod 505 and a lower pressure plate 506. The two ends of the U-shaped rod 505 are fixedly installed at the bottom ends of the two lifting rods 503. The lower pressure plate 506 is fixedly installed at the bottom end of the translation seat 403, and the end away from the translation seat 403 is located between the U-shaped rod 505 and the second support seat 401. The push plate 404 drives the translation seat 403 to move within the movable groove 402, causing the lower pressure plate 506 to move simultaneously with the translation seat 403. When the lower pressure plate 506 moves, it squeezes the U-shaped rod 505, causing the U-shaped rod 505 to drive the lifting rod 503 to descend.

[0026] Working Principle: In use, the end screen of the high-voltage bushing is placed into the end screen placement slot 303. After placement, the terminal of the end screen contacts and conducts electricity with the terminal block 304, and the conductive ring 501 contacts the copper sleeve of the end screen. Since the copper sleeve in the end screen is connected to the grounding base at this time, the grounding status of the end screen during normal operation can be detected by the detection instrument 2. After this detection is completed, the electric push rod 405 is activated, which pushes the push plate 404 to move closer to the end screen placement slot 303. The push plate 404 drives the translation seat 403 to move in the movable slot 402, so that the lower pressure plate 506 moves simultaneously with the translation seat 403. When the lower pressure plate 506 moves, it squeezes the U-shaped rod 505, causing the U-shaped rod 505 to drive the lifting rod 503 to descend. The lifting rod 503 drives the conductive ring 501 to descend, so that the conductive ring 501 is not connected to the copper sleeve in the end screen, but is on the translation seat 403. Simultaneously, the support frame 406 drives the cylinder frame 407 to move closer to the end screen, and the cylinder frame 407 drives the push ring 408 to move at the same time. When the push ring 408 contacts the copper sleeve, it pushes the copper sleeve, causing the copper sleeve to disconnect from the grounding base. As the cylinder frame 407 drives the push ring 408 to move, causing the copper sleeve to slide on the lead post in the end screen, the lead post connects with the conductive plate 411. During the movement of the cylinder frame 407, the conductive plate 411 is blocked by the lead post, causing the distance between the conductive plate 411 and the support frame 406 to continuously decrease. When the conductive plate 411 contacts the conductive clamp 410, it drives the conductive clamp 410 to rotate, causing the two conductive clamps 410 to clamp on the lead post. At this time, the conductive clamp 410 can stably clamp the lead post, and the connection between the conductive clamp 410 and the conductive plate 411 and the lead post allows the detection instrument 2 to detect the state of the end screen after the copper sleeve is disconnected from the grounding base.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the grounding status of the end screen of a high-voltage bushing, comprising a base plate (1), wherein a detection instrument (2) is provided at the middle of the front side of the top of the base plate (1), characterized in that, It also includes a screen placement mechanism (3), a circuit breaker detection mechanism (4), and a grounding detection mechanism (5): The end screen placement mechanism (3) includes an end screen placement slot (303), which is located above the middle of the base plate (1) and the end screen of the high-voltage bushing is placed through the end screen placement slot (303). The circuit breaker detection mechanism (4) includes a push ring (408), which is located on the upper right end of the base plate (1). The push ring (408) pushes the copper sleeve in the end screen. The grounding detection mechanism (5) includes a conductive ring (501), which is located at one end of the end screen placement slot (303) near the push ring (408) and is connected to the bottom end of the copper sleeve in the end screen through the conductive ring (501).

2. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 1, characterized in that: The end screen placement mechanism (3) includes a first support base (301), a connecting frame (302), and a terminal block (304). The first support base (301) is fixedly installed on the left end of the base plate (1). The connecting frame (302) is fixedly installed on the top of the first support base (301). The end screen placement slot (303) is fixedly installed on the side wall of the connecting frame (302) near the middle of the base plate (1). The terminal block (304) is fixedly installed on the middle side of the end screen placement slot (303) near the connecting frame (302). The terminal block (304) is electrically connected to the detection instrument (2) through a wire.

3. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 2, characterized in that: The circuit breaker detection mechanism (4) includes a second support base (401), a movable slot (402), and a translational seat (403). The second support base (401) is fixedly installed on the right end of the base plate (1). The movable slot (402) is opened in the middle of the second support base (401), and the translational seat (403) is movably installed in the movable slot (402).

4. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 3, characterized in that: The circuit breaker detection mechanism (4) includes a push plate (404), an electric push rod (405), and a support frame (406). The push plate (404) is fixedly installed on the side of the bottom of the translation seat (403) near the end screen placement slot (303). The electric push rod (405) is fixedly installed on the right side wall of the second support seat (401). The output shaft of the electric push rod (405) is fixedly connected to the push plate (404). The support frame (406) is fixedly installed on the top of the translation seat (403).

5. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 4, characterized in that: The circuit breaker detection mechanism (4) includes a cylindrical frame (407), a right-angle frame (409), and a conductive clamp (410). The cylindrical frame (407) is fixedly installed on the top of the support frame (406) near the end screen placement slot (303). The push ring (408) is fixedly installed on the end of the cylindrical frame (407) away from the support frame (406). There are two sets of right-angle frames (409), which are fixedly installed on the upper and lower sides of the cylindrical frame (407) near the support frame (406), respectively. There are two conductive clamps (410), which are movably installed on the ends of the two sets of right-angle frames (409) near the push ring (408), respectively.

6. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 5, characterized in that: The circuit breaker detection mechanism (4) includes a conductive plate (411), a hollow rod (412), and a first spring (413). The conductive plate (411) is movably disposed inside the cylindrical frame (407). The hollow rod (412) is inserted and installed in the middle of one end of the cylindrical frame (407) near the support frame (406). The end of the hollow rod (412) away from the support frame (406) is fixedly connected to the middle of the conductive plate (411). The conductive plate (411) is electrically connected to the detection instrument (2) through a wire, and the wire passes through the hollow rod (412). The first spring (413) is movably sleeved on the hollow rod (412) and is located between the cylindrical frame (407) and the conductive plate (411).

7. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 6, characterized in that: The grounding detection mechanism (5) includes a terminal block (502), a lifting rod (503), and a second spring (504). The terminal block (502) is movably installed at one end of the end screen placement slot (303) near the push ring (408), and its top end is fixedly installed at the middle of the bottom end of the conductive ring (501). The terminal block (502) is electrically connected to the detection instrument (2) through a wire. There are two lifting rods (503), both of which are fixedly installed at one end of the end screen placement slot (303) near the push ring (408) and are located on both sides of the terminal block (502). The top ends of both are fixedly connected to the conductive ring (501). Both lifting rods (503) are inserted into the top of the second support base (401). There are two second springs (504), which are respectively sleeved on the two lifting rods (503) and located between the end screen placement slot (303) and the second support base (401).

8. The device for detecting the grounding status of the end screen of a high-voltage bushing according to claim 7, characterized in that: The grounding detection mechanism (5) includes a U-shaped rod (505) and a lower pressure plate (506). The two ends of the U-shaped rod (505) are fixedly installed at the bottom ends of two lifting rods (503). The lower pressure plate (506) is fixedly installed at the bottom end of the translation seat (403), and the end away from the translation seat (403) is located between the U-shaped rod (505) and the second support seat (401).

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