A device for testing the insulation performance of a power distribution cabinet

Abstract

This invention provides a device for testing the insulation performance of a power distribution cabinet, applied in the field of insulation testing technology. This application uses a connector to connect the positive terminal of the power distribution cabinet, and connects a contact that can be manually operated and moved flexibly to the negative terminal of a digital multimeter installed in the main unit. By attaching the contact to the surface of the power distribution cabinet and moving it in an orderly manner, the uniformity performance of the power distribution cabinet can be tested. This not only effectively improves the efficiency of insulation performance testing, but also allows for precise location of insulation defects on the surface of the power distribution cabinet during the testing process, effectively improving the convenience of repairing defects after testing.

Description

Technical Field

[0001] This application relates to the field of insulation testing technology, and in particular to a device for testing the insulation performance of a distribution cabinet. Background Technology

[0002] As the core equipment for power transmission and distribution, the safety and reliability of the distribution cabinet are directly related to the stable operation of the entire power system. Therefore, during the production process of the distribution cabinet, it is necessary to coat its inner and outer surfaces with an insulating layer. In order to ensure the stability of the insulation performance of the distribution cabinet, insulation performance testing is required after production.

[0003] In existing technologies, the insulation performance of distribution cabinets is typically tested using fixed-point current or voltage data monitoring. However, the probes used for insulation testing cannot fully cover the distribution cabinet. Even with multiple probes at various points, the testing area is only expanded, not completely covered. This results in incomplete and inaccurate test results. Furthermore, after testing, staff can often only determine if there is leakage, but cannot accurately pinpoint the location of insulation defects. Consequently, during repairs, the only solution is usually to reapply insulation coating to the entire distribution cabinet surface, which is not only costly in terms of manpower and time but also wastes insulating coating.

[0004] Therefore, a device for testing the insulation performance of distribution cabinets is proposed to solve some of the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of this application is to comprehensively test the insulation effect of the insulation layer on the surface of the distribution cabinet and accurately locate the fault. Compared with the prior art, it provides a distribution cabinet insulation performance testing device, including a main unit, a connector and a contact element connected to the main unit, a digital multimeter with a buzzer setting inside the main unit, a cylindrical shell with a magnet fixed around its bottom edge, a first support platform installed inside the cylindrical shell, a second support platform installed inside the first support platform, a round rod fixed inside the second support platform, the round rod moving through the first support platform and extending into the cylindrical shell, a probe inserted into the bottom end of the round rod, a handle with a contact ball fixed at one end, and uniformly distributed metal bristles fixed on the outer surface of the contact ball, the positive terminal of the digital multimeter connected to the probe, and the negative terminal of the digital multimeter connected to the metal bristles.

[0006] Furthermore, the first support platform is rotatably installed inside the cylindrical shell, and the second support platform is equipped with a grinding component and a coating component. Both the grinding component and the coating component pass through the first support platform and extend into the cylindrical shell. The round rod, the grinding component, and the coating component are evenly distributed around the rotation center of the first support platform.

[0007] Furthermore, the grinding assembly includes a first rib rotatably connected to the second support platform, the first rib movably passing through the first support platform and extending into the cylindrical shell, the bottom end of the first rib being inserted with a first spline rod, and the bottom end of the first spline rod being fixed with a grinding head; the coating assembly includes a second rib rotatably connected to the second support platform, the second rib movably passing through the first support platform and extending into the cylindrical shell, the bottom end of the second rib being inserted with a second spline rod, and the bottom end of the second spline rod being fixed with a coating head; a drive assembly for driving the first and second ribs to rotate is installed inside the cylindrical shell.

[0008] Furthermore, the drive assembly includes a first servo motor fixedly installed inside the cylindrical shell, a second gear ring slidably sleeved on the outer side of both the first and second ribs and rotatably installed inside the first support platform, a second gear ring coaxially rotating inside the first support platform, and a second gear meshing between the first gear and the second gear ring rotating inside the first support platform.

[0009] Furthermore, the second support platform is slidably inserted into the first support platform. A number of screws are vertically fixed in the second support platform and arranged in a ring. The outer side of the screws is threaded with a screw sleeve that is rotatably installed in the first support platform. A fourth gear is fixed on the outer side of the screw sleeve. A third gear ring of the same size as the second gear ring is meshed on the outer side of the numerous fourth gears.

[0010] Furthermore, the probe is slidably inserted into the bottom end of the round rod, and a first spring elastically supports the outer side of the upper end of the probe between the round rod and the probe. The first spline rod is slidably inserted into the bottom end of the first prism rod, and a second spring elastically supports the outer side of the first spline rod between the first prism rod and the grinding head. The second spline rod is slidably inserted into the bottom end of the second prism rod, and a third spring elastically supports the outer side of the second spline rod between the second prism rod and the brush head. In the unloaded state, the bottom of the brush head is below the bottom of the grinding head, and the bottom of the grinding head is below the bottom of the probe.

[0011] Furthermore, a first gear ring of the same size as the second gear ring is fixed on the first bearing platform, a spline shaft is fixed on the drive shaft of the first servo motor, and a spline cylinder is slidably sleeved on the outer side of the spline shaft. A third gear that meshes with the second gear ring is fixed on the spline cylinder. An electric push rod that is parallel to the spline shaft is fixed inside the cylinder shell, and a connecting plate is fixed on the telescopic end of the electric push rod. The connecting plate is rotatably connected to the spline cylinder.

[0012] Furthermore, channels are provided inside the first rib, the first spline rod, the second rib, and the second spline rod. A first adapter cylinder rotatably connected to the outside of the first rib is fixed inside the second support platform, and a first adapter pipe is fixedly connected to the outside of the first adapter cylinder. A second adapter cylinder rotatably connected to the outside of the second rib is fixed inside the second support platform, and a second adapter pipe is fixedly connected to the outside of the second adapter cylinder. A dust extraction device and an insulating coating supply pump are installed inside the main unit.

[0013] Furthermore, the first adapter tube extends to the center of the top of the second support platform, and the second adapter tube extends into the first adapter tube. A disc is provided above the second support platform, and a first adapter box rotatably connected to the first adapter tube and a second adapter box rotatably connected to the second adapter tube are fixed on the disc. A metal ring plate coaxially arranged with the second support platform is fixed on the disc, and the metal ring plate slides in contact with the top of the round rod.

[0014] Furthermore, a turntable is rotatably mounted on the end of the handle near the contact ball, and a nozzle is fixed at the edge of the turntable. A second servo motor for driving the turntable to rotate is fixed on the handle.

[0015] Compared to existing technologies, the advantages of this application are:

[0016] (1) This application connects the positive terminal of the power distribution cabinet with a connector and connects the contact piece that can be manually operated and moved flexibly to the negative terminal of the digital multimeter installed in the host. By attaching the contact piece to the surface of the power distribution cabinet and moving it in an orderly manner, the uniformity performance of the power distribution cabinet can be tested. This not only effectively improves the efficiency of the insulation performance test of the power distribution cabinet, but also allows for the accurate location of the insulation gaps on the surface of the power distribution cabinet during the test, which effectively improves the convenience of the staff to repair the gaps after the test.

[0017] (2) By setting a grinding component and a coating component inside the cylinder shell, and rotating the first support platform inside the cylinder shell, the position of the probe, the grinding head in the grinding component, and the coating head in the coating component can be flexibly adjusted by rotating the first support platform. This allows the device to remove the insulation layer on the surface of the distribution cabinet at the point of contact before using the probe to connect to the distribution cabinet by rotating the grinding head at high speed. This helps to ensure the stability of the probe and the distribution cabinet connection. After the test is completed, the insulation layer is recoated on the previously ground position by the coating component. This helps to ensure the continuity and stability of the device in testing the insulation performance of the distribution cabinet.

[0018] (3) By sliding the second support platform into the first support platform, sliding the probe into the bottom end of the round rod, sliding the first spline rod into the bottom end of the first prism rod, and sliding the second spline rod into the bottom end of the second prism rod, and with the elastic support of the first spring, the second spring and the third spring, it can not only effectively ensure the tightness of the probe, grinding head and brush head when they are in contact with the surface of the distribution cabinet, but also flexibly adjust the contact state of the probe, grinding head and brush head with the surface of the distribution cabinet according to the needs, which is conducive to ensuring the stability of the probe, grinding component and brush component in the device during operation.

[0019] (4) By setting the first gear ring for driving the first bearing platform to rotate, the second gear ring for driving the first and second ribs to rotate, and the third gear ring for driving the threaded sleeve to rotate coaxially and having the same outer dimensions, and with the lifting control of the third gear, the device can maintain a meshing state with the first gear ring, the second gear ring and the third gear ring respectively by adjusting the position of the third gear. This makes the power drive in the connector only need to rely on a single first servo motor, which can not only effectively improve the rationality of the narrow structure in the connector, but also help reduce the amount of first servo motor used, and help reduce the manufacturing cost of the device.

[0020] (5) By installing a rotatable turntable at one end of the handle near the contact ball and fixing the nozzle at the edge of the turntable, the nozzle can be driven by the second servo motor to circle the location of the leak during rotation. By marking the location of the insulation layer leak during the inspection process, it is convenient to repair it uniformly after the inspection, which to a certain extent improves the convenience of the staff to repair the insulation layer leak after the inspection. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present application;

[0022] Figure 2 This is a perspective view of the connector in this application;

[0023] Figure 3 This is an exploded view of the connector in this application;

[0024] Figure 4 This is an exploded view of the first bearing platform, the second gear ring, and the third gear ring of this application;

[0025] Figure 5 This is an exploded view of the polishing components of this application;

[0026] Figure 6 An exploded view of the coating component of this application;

[0027] Figure 7 This is a perspective view of the splined shaft, splined cylinder, and third gear of this application;

[0028] Figure 8 This is a perspective view of the metal bristles and nozzle of this application;

[0029] Figure 9 For this application Figure 1 Top sectional view of the middle structure;

[0030] Figure 10 For this application Figure 9 Enlarged view of point A in the middle;

[0031] Figure 11 For this application Figure 2 Top view of the structure;

[0032] Figure 12 For this application Figure 11 Sectional view at point BB;

[0033] Figure 13 For this application Figure 11 Sectional view at CC;

[0034] Figure 14 This is a perspective view used in this application.

[0035] Explanation of the labels in the diagram:

[0036] 1. Main unit; 2. Shell; 201. Magnet; 202. First support platform; 203. First gear ring; 204. Second support platform; 3. Round rod; 301. Probe; 302. First spring; 4. First rib rod; 401. First spline rod; 402. Grinding head; 403. Second spring; 404. First adapter cylinder; 405. First adapter pipe; 5. Second rib rod; 501. Second spline rod; 502. Brush head; 503. Third spring; 504. Second adapter cylinder; 505. Second adapter pipe; 6. First servo motor Machine; 601, First gear; 602, Second gear ring; 603, Second gear; 604, Splined shaft; 605, Splined cylinder; 606, Third gear; 607, Electric push rod; 608, Connecting plate; 7, Screw; 701, Screw sleeve; 702, Fourth gear; 703, Third gear ring; 8, Disc; 801, First adapter box; 802, Second adapter box; 803, Metal ring; 9, Handle; 901, Contact ball; 902, Metal bristles; 903, Turntable; 904, Nozzle; 905, Second servo motor. Detailed Implementation

[0037] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0038] Example 1:

[0039] This invention provides a device for testing the insulation performance of a power distribution cabinet. Please refer to [link / reference]. Figures 1-14 The device includes a main unit 1, which is connected to a connector and a contact. The main unit 1 contains a digital multimeter with a buzzer function. The connector includes a housing 2, with a magnet 201 fixed around the bottom edge of the housing 2. A first support platform 202 is installed inside the housing 2, and a second support platform 204 is installed inside the first support platform 202. A round rod 3 is fixed inside the second support platform 204 and moves through the first support platform 202 and extends into the housing 2. A probe 301 is inserted into the bottom end of the round rod 3. The contact includes a handle 9, with a contact ball 901 fixed at one end of the handle 9. The outer surface of the contact ball 901 is fixed with uniformly distributed metal bristles 902. The positive terminal of the digital multimeter is connected to the probe 301, and the negative terminal of the digital multimeter is connected to the metal bristles 902.

[0040] During operation, the operator uses magnet 201 to magnetically attract the connector to the surface of the iron distribution cabinet. In this state, the probe 301, mounted at the bottom of the round rod 3, penetrates the insulating layer coated on the cabinet surface and directly contacts it. The operator then holds the handle 9 and presses the evenly fixed metal bristles 902 on the outer surface of the contact ball 901 against the cabinet surface. In this state, the positive terminal of the digital multimeter inside the main unit 1 delivers current to the probe 301, which then transmits it to the distribution cabinet. The operator, holding the handle 9, manipulates the metal bristles 902 fixed on the outer surface of the contact ball 901 to gradually sweep across the cabinet surface. If there are gaps in the insulating layer coating the cabinet surface, the gaps will be detected. The presence of this structure allows the metal bristles 902 to directly contact the iron layer inside the distribution cabinet. This causes the current supplied to the distribution cabinet to be transmitted back to the negative terminal of the digital multimeter inside the host unit 1 through the metal bristles 902, forming a current path and triggering a buzzer alarm. If the insulation layer coated on the surface of the distribution cabinet is complete and comprehensive, the metal bristles 902 cannot directly contact the distribution cabinet through the insulation layer, and no path will be formed between the positive and negative terminals of the digital multimeter inside the host unit 1, thus no buzzer alarm will be triggered. The above structural design can effectively improve the convenience and efficiency of staff in testing the insulation performance of the distribution cabinet, and can quickly and accurately locate the parts with insulation defects, thereby improving the convenience of staff in repairing the defect locations after testing.

[0041] Please see Figures 3-6 and Figure 13A first support platform 202 is rotatably mounted inside the cylindrical shell 2. A grinding assembly and a coating assembly are installed inside a second support platform 204. Both the grinding assembly and the coating assembly penetrate the first support platform 202 and extend into the cylindrical shell 2. The round rod 3, the grinding assembly, and the coating assembly are evenly distributed around the rotation center of the first support platform 202. The grinding assembly includes a first prism rod 4 rotatably connected to the second support platform 204, and the first prism rod 4 movably penetrates the first support platform 202 and extends into the cylindrical shell 2. A first spline rod 401 is inserted into the bottom end of the first prism rod 401, and a grinding head 402 is fixed to the bottom end of the first spline rod 401. The coating assembly includes a second prism rod 5 rotatably connected to the second support platform 204, and the second prism rod 5 movably penetrates the first support platform 202. The second rib 5 extends into the shell 2. The bottom end of the second rib 5 is inserted with a second spline rod 501, and the bottom end of the second spline rod 501 is fixed with a brush head 502. A drive assembly for driving the first rib 4 and the second rib 5 to rotate is installed inside the shell 2. The drive assembly includes a first servo motor 6 fixedly installed inside the shell 2. The outer sides of the first rib 4 and the second rib 5 are slidably fitted with a second gear ring 602 rotatably installed inside the first support platform 202. The internal dimensions of the second gear ring 602 are adapted to the outer dimensions of the first rib 4 and the second rib 5. The second gear ring 602 rotates coaxially inside the first support platform 202. A second gear 603 meshes between the first gear 601 and the second gear ring 602 inside the first support platform 202.

[0042] During the use of this device, before the probe 301 is connected to the distribution cabinet, in order to ensure the stability of the connection between the probe 301 and the iron layer inside the distribution cabinet, the insulating layer coated on the surface of the distribution cabinet at the point of connection is removed by the grinding component. During the above operation, the first spline rod 401 is tightly attached to the insulating layer on the surface of the distribution cabinet. Then, the first servo motor 6 in the drive component is powered on and started, driving the second gear ring 602 to rotate. With the meshing of the second gear 603 with the second gear ring 602 and the first gear 601, the first gear 601 is provided with rotational power. The rotational power of the first gear 601 is transmitted to the first rib rod 4, which drives the grinding head 402 to rotate. Through the high-speed rotation of the grinding head 402, the insulating layer at the corresponding position is ground clean. Then, the device controls the first support platform 202 to rotate, so that the probe 301 is transferred to the position of the grinding head 402. The probe 301 directly connects with the iron layer on the distribution cabinet through the ground-off insulating layer.

[0043] After the device completes the insulation performance test of the distribution cabinet, it will reapply the insulation layer to the previously removed insulation layer on the surface of the distribution cabinet using a coating component. During the above operation, the device controls the first support platform 202 to rotate, so that the coating head 502 in the coating component moves to the position of the probe 301. Then, the coating head 502 is tightly attached to the position where the insulation layer was removed on the surface of the distribution cabinet. After the first servo motor 6 in the drive component is powered on and started, it drives the second gear ring 602 to rotate. Through the meshing of the second gear 603 with the second gear ring 602 and the first gear 601, the rotational power is transmitted to the first gear 601, which then drives the second rib 5 to rotate. The coating head 502 will deliver insulating paint. Through the rotation of the coating head 502, the insulating paint is evenly applied to the previously removed insulation layer position. The outer dimension of the coating head 502 is larger than the outer dimension of the grinding head 402, which can ensure the stability of the insulation layer recoating process.

[0044] Please see Figures 3-6 and Figure 13 The second support platform 204 is slidably inserted into the first support platform 202. A plurality of screws 7 are vertically fixed within the second support platform 204, arranged in a circular pattern. A threaded sleeve 701, rotatably mounted within the first support platform 202, is threaded onto the outer side of each screw 7. A fourth gear 702 is fixed to the outer side of the threaded sleeve 701. A third gear ring 703, of the same size as the second gear ring 602, is meshed with the outer sides of the plurality of fourth gears 702. The probe 301 is slidably inserted into the bottom end of the round rod 3. A third gear ring 703, elastically supported between the round rod 3 and the probe 301, is movably sleeved on the outer side of the upper end of the probe 301. A spring 302, a first spline rod 401 slidably inserted into the bottom end of the first prism rod 4, a second spring 403 elastically supported between the first prism rod 4 and the grinding head 402 is movably sleeved on the outer side of the first spline rod 401, a second spline rod 501 slidably inserted into the bottom end of the second prism rod 5, a third spring 503 elastically supported between the second prism rod 5 and the brush head 502 is movably sleeved on the outer side of the second spline rod 501, and in the unloaded state, the bottom of the brush head 502 is below the bottom of the grinding head 402, and the bottom of the grinding head 402 is below the bottom of the probe 301.

[0045] During use, the device allows the second support platform 204 to be slidably inserted into the first support platform 202, and the threaded connection between the screw 7 and the screw sleeve 701 enables the second support platform 204 to be flexibly raised and lowered relative to the first support platform 202. When the screw sleeve 701 is driven to rotate, the third gear ring 703 is driven to rotate by the first servo motor 6. Through the meshing of the inner side of the third gear ring 703 with the fourth gear 702, the rotational power is transmitted to the screw sleeve 701. During the rotation of the screw sleeve 701, the screw sleeve 701 and the screw 7 are driven to move relative to each other through the threaded connection between the screw sleeve 701 and the screw 7, thereby realizing the raising and lowering control between the second support platform 204 and the first support platform 202.

[0046] Since the probe 301, grinding head 402, and brush head 502 are in an unloaded state at the bottom, with the brush head 502 positioned at the bottom of the grinding head 402 and the grinding head 402 positioned at the bottom of the probe 301, and with the elastic support of the first spring 302, the second spring 403, and the third spring 503 respectively, the device can flexibly control the contact state of the probe 301, grinding head 402, and brush head 502 with the surface of the distribution cabinet according to actual needs through the lifting control of the second support platform 204. During use, when the bottom of the brush head 502 is in contact with the surface of the distribution cabinet, the grinding head 402 and the probe 301 are not in contact with the distribution cabinet. In this state, when the first servo motor 6 drives the second gear ring 602 to rotate, the first rib 4 and the second rib 5 will be simultaneously... While the first servo motor 6 drives the second gear ring 602 to rotate, the first rib 4 and the second rib 5 are simultaneously driven to rotate. The grinding head 402 grinds the surface of the distribution cabinet during high-speed rotation, while the brush head 502 rotates close to the surface of the distribution cabinet, thus preventing damage to the insulation layer. When the probe 301 contacts the surface of the distribution cabinet, both the grinding head 402 and the brush head 502 are in contact with the surface. In this state, the grinding head 402 and the brush head 502 are not driven to rotate, thus preventing damage to the insulation layer of the distribution cabinet.

[0047] During operation, the outer dimensions of the first spline rod 401 are matched with the inner dimensions of the first prism rod 4, and the outer dimensions of the second spline rod 501 are matched with the inner dimensions of the second prism rod 5. This ensures that the sliding of the first spline rod 401 relative to the first prism rod 4 will not affect the rotation of the grinding head 402 driven by the first prism rod 4. Similarly, the sliding of the second spline rod 501 relative to the second prism rod 5 will not affect the rotation of the brush head 502 driven by the second prism rod 5. This is achieved through the probe 301 and the round rod... The sliding connection of the probe 301, the sliding connection of the first spline rod 401 to the first rib rod 4, the sliding connection of the second spline rod 501 to the second rib rod 5, and the elastic support of the first spring 302, the second spring 403 and the third spring 503, together with the lifting and adjusting of the second support platform 204, can effectively improve the tightness of the probe 301, the grinding head 402 and the brush head 502 when they are in contact with the surface of the power distribution cabinet, which is conducive to ensuring the stability of the probe 301, the grinding assembly and the brush assembly during operation in the device.

[0048] Please see Figure 3 , Figure 4 , Figure 7 and Figure 13 A first gear ring 203 of the same size as the second gear ring 602 is fixed on the first support platform 202. A spline shaft 604 is fixed on the drive shaft of the first servo motor 6, and a spline cylinder 605 is slidably sleeved on the outer side of the spline shaft 604. A third gear 606 that meshes with the second gear ring 602 is fixed on the spline cylinder 605. An electric push rod 607 that is parallel to the spline shaft 604 is fixed inside the cylinder shell 2, and a connecting plate 608 is fixed on the telescopic end of the electric push rod 607. The connecting plate 608 is rotatably connected to the spline cylinder 605.

[0049] During operation, the electric push rod 607 is activated. Through the movement of its telescopic end and the connection via the connecting plate 608, the splined cylinder 605 and the third gear 606 fixed to its outer side can be moved. The meshing state of the third gear 606 with the first gear ring 203, the second gear ring 602, and the third gear ring 703 is adjusted. After the first servo motor 6 is powered on, it drives the splined shaft 604, which is fixedly connected to its drive shaft, to rotate. The splined shaft 604 drives the splined cylinder 605 to rotate synchronously, and then drives the third gear 606 to rotate. The outer dimensions of the splined shaft 604 are adapted to the inner dimensions of the splined cylinder 605. The sliding of the splined cylinder 605 along the splined shaft 604 does not interfere with the transmission of its rotational power. When it is necessary to control the rotation of the grinding head 402 and the brush head 502, the first... The third gear 606 is adjusted to mesh with the second gear ring 602, transmitting rotational power to the second gear ring 602. When it is necessary to control the rotation of the first support platform 202, the third gear 606 is adjusted to mesh with the first gear ring 203, transmitting rotational power to the first gear ring 203. When it is necessary to control the lifting and lowering of the second support platform 204, the third gear 606 is adjusted to mesh with the third gear ring 703, transmitting rotational power to the third gear ring 703. The above structural arrangement allows the power drive inside the connector to be achieved by only a single first servo motor 6. The minimum number of first servo motors 6 can be set in the limited space inside the cylindrical shell 2, which not only effectively improves the rationality of the connector structure, but also helps to reduce the number of first servo motors 6 used, thus reducing the manufacturing cost of the device.

[0050] Please see Figure 5 , Figure 6 and Figures 12-13 The first prism bar 4, the first spline bar 401, the second prism bar 5, and the second spline bar 501 have channels. A first adapter cylinder 404, rotatably connected to the outside of the first prism bar 4, is fixedly installed inside the second support platform 204, and a first adapter pipe 405 is fixedly connected to the outside of the first adapter cylinder 404. A second adapter cylinder 504, rotatably connected to the outside of the second prism bar 5, is fixedly installed inside the second support platform 204, and a second adapter pipe 505 is fixedly connected to the outside of the second adapter cylinder 504. A dust extraction device and insulating coating are installed inside the main unit 1. The pump is supplied with a first adapter pipe 405 that extends to the center of the top of the second support platform 204, and a second adapter pipe 505 that extends into the first adapter pipe 405. A disc 8 is provided above the second support platform 204, and a first adapter box 801 that is rotatably connected to the first adapter pipe 405 and a second adapter box 802 that is rotatably connected to the second adapter pipe 505 are fixed on the disc 8. A metal ring 803 that is coaxially arranged with the second support platform 204 is fixed on the disc 8, and the metal ring 803 slides in contact with the top end of the round rod 3.

[0051] During operation, the dust extraction device inside the main unit 1 is connected to the first adapter box 801 via a flexible hose. When the grinding head 402 is used to grind and remove the insulation layer on the surface of the distribution cabinet, the air pump inside the main unit 1 is powered on and activated. The airflow is used to extract dust from the grinding head 402. The dust and debris generated by the grinding head 402 enter the first adapter cylinder 404 through the channels opened in the first spline rod 401 and the first rib rod 4, and then enter the first adapter box 801 through the connection of the first adapter pipe 405. Finally, it enters the dust extraction device, which actively removes dust from the surface of the distribution cabinet. The dust and debris generated during the grinding of the electrical cabinet surface can effectively ensure the stability of the high-speed rotation of the grinding head 402 in removing the insulation layer from the electrical cabinet surface, and ensure the clean and stable operation of the equipment. The insulating coating supply pump in the main unit 1 is connected to the second adapter box 802 through a hose. When applying the insulation layer to the electrical cabinet surface, the insulating coating is delivered into the second adapter box 802 through the insulating coating supply pump, and then enters the second adapter cylinder 504 through the second adapter pipe 505. Finally, it is sprayed onto the electrical cabinet surface through the channels opened in the second rib rod 5 and the second spline rod 501 by the self-coating brush head 502.

[0052] In this device, the sliding connection between the metal ring 803 and the top of the round rod 3 ensures that when the first support platform 202 rotates and adjusts the position of the probe 301, it will not affect the power connection of the digital multimeter in the positive direction. The rotational connection between the first prism rod 4 and the first adapter cylinder 404, as well as the rotational connection between the first adapter pipe 405 and the first adapter box 801, prevents the airflow from being affected by the rotation of the first support platform 202 and the first prism rod 4. Similarly, the rotational connection between the second prism rod 5 and the second adapter cylinder 504, as well as the rotational connection between the second adapter pipe 505 and the second adapter box 802, ensures that the supply of insulating coating will not be affected by the rotation of the first support platform 202 and the second prism rod 5. With their combined operation, the stability of the device during actual use is effectively guaranteed.

[0053] Please see Figure 8 and Figure 10 A turntable 903 is rotatably mounted on one end of the handle 9 near the contact ball 901, and a nozzle 904 is fixed at the edge of the turntable 903. A second servo motor 905 is fixed on the handle 9 to drive the turntable 903 to rotate. During the use of this device, when the operator detects a hole in the insulation layer, the operator can operate the device to power on the second servo motor 905, which will drive the turntable 903 to rotate the nozzle 904 around the metal bristles 902 evenly distributed on the outside of the contact ball 901. During the rotation of the nozzle 904, marking pigment is sprayed to mark the hole location. By marking the location of the insulation layer hole during the detection process, it is convenient to repair it uniformly after the detection is completed, which improves the convenience of the operator in repairing the insulation layer hole after the detection to a certain extent.

[0054] The above are merely the best implementation methods adopted in this application in light of current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A device for testing the insulation performance of a power distribution cabinet, comprising a main unit (1), characterized in that, The host (1) is connected to a connector and a contact. The host (1) is equipped with a buzzer mode of a digital multimeter. The connector includes a cylindrical shell (2), and a magnet (201) is fixed around the bottom edge of the cylindrical shell (2). A first support platform (202) is installed inside the cylindrical shell (2), and a second support platform (204) is installed inside the first support platform (202). A round rod (3) is fixed inside the second support platform (204), and the round rod (3) moves through the first support platform (202) and extends into the cylindrical shell (2). A probe (301) is inserted into the bottom end of the round rod (3). The contact includes a handle (9), and a contact ball (901) is fixed at one end of the handle (9). The outer surface of the contact ball (901) is fixed with uniformly distributed metal bristles (902). The positive terminal of the digital multimeter is connected to the probe (301), and the negative terminal of the digital multimeter is connected to the metal bristles (902). The first support platform (202) is rotatably installed inside the cylindrical shell (2). The second support platform (204) is equipped with a grinding component and a coating component. The grinding component and the coating component both penetrate the first support platform (202) and extend into the cylindrical shell (2). The round rod (3), the grinding component and the coating component are evenly distributed around the rotation center of the first support platform (202). The grinding assembly includes a first rib (4) rotatably connected to the second support platform (204), and the first rib (4) movably passes through the first support platform (202) and extends into the cylindrical shell (2). The bottom end of the first rib (4) is inserted with a first spline rod (401), and the bottom end of the first spline rod (401) is fixed with a grinding head (402). The coating assembly includes a second rib (5) rotatably connected to the second support platform (204), and the second rib (5) movably passes through the first support platform (202) and extends into the cylindrical shell (2). The bottom end of the second rib (5) is inserted with a second spline rod (501), and the bottom end of the second spline rod (501) is fixed with a coating head (502). The cylindrical shell (2) is equipped with a driving assembly for driving the first rib (4) and the second rib (5) to rotate. The probe (301) is slidably inserted into the bottom end of the round rod (3). The upper outer side of the probe (301) is movably sleeved with a first spring (302) elastically supported between the round rod (3) and the probe (301). The first spline rod (401) is slidably inserted into the bottom end of the first prism rod (4). The outer side of the first spline rod (401) is movably sleeved with a second spring (403) elastically supported between the first prism rod (4) and the grinding head (402). The second spline rod (501) is slidably inserted into the bottom end of the second prism rod (5). The outer side of the second spline rod (501) is movably sleeved with a third spring (503) elastically supported between the second prism rod (5) and the brush head (502). In the unforced state, the bottom of the brush head (502) is below the bottom of the grinding head (402), and the bottom of the grinding head (402) is below the bottom of the probe (301).

2. The device for testing the insulation performance of a distribution cabinet according to claim 1, characterized in that, The drive assembly includes a first servo motor (6) fixedly installed inside the cylindrical shell (2), and a second gear ring (602) slidably mounted on the outer side of the first rib (4) and the second rib (5) and rotatably mounted in the first support platform (202). The second gear ring (602) is coaxially rotatable inside the first support platform (202), and a second gear (603) rotatably meshes between the first gear (601) and the second gear ring (602) inside the first support platform (202).

3. The device for testing the insulation performance of a distribution cabinet according to claim 2, characterized in that, The second support platform (204) is slidably inserted into the first support platform (202). A number of screws (7) are vertically fixed in the second support platform (204) and are distributed around it. The outer side of the screws (7) is threaded with a screw sleeve (701) that is rotatably installed in the first support platform (202). A fourth gear (702) is fixed on the outer side of the screw sleeve (701). The outer sides of the numerous fourth gears (702) are meshed with a third gear ring (703) of the same size as the second gear ring (602).

4. The device for testing the insulation performance of a distribution cabinet according to claim 3, characterized in that, A first gear ring (203) of the same size as the second gear ring (602) is fixed on the first support platform (202). A spline shaft (604) is fixed on the drive shaft of the first servo motor (6), and a spline cylinder (605) is slidably sleeved on the outer side of the spline shaft (604). A third gear (606) that meshes with the second gear ring (602) is fixed on the spline cylinder (605). An electric push rod (607) that is parallel to the spline shaft (604) is fixed inside the cylinder shell (2), and a connecting plate (608) is fixed on the telescopic end of the electric push rod (607). The connecting plate (608) is rotatably connected to the spline cylinder (605).

5. The device for testing the insulation performance of a distribution cabinet according to claim 1, characterized in that, The first prism rod (4), the first spline rod (401), the second prism rod (5) and the second spline rod (501) are provided with channels. The second support platform (204) is fixed with a first adapter cylinder (404) that is rotatably connected to the outside of the first prism rod (4), and the outside of the first adapter cylinder (404) is fixedly connected with a first adapter pipe (405). The second support platform (204) is fixed with a second adapter cylinder (504) that is rotatably connected to the outside of the second prism rod (5), and the outside of the second adapter cylinder (504) is fixedly connected with a second adapter pipe (505). The main unit (1) is equipped with a dust extraction device and an insulating coating supply pump.

6. The device for testing the insulation performance of a distribution cabinet according to claim 5, characterized in that, The first adapter tube (405) extends to the top center of the second support platform (204), and the second adapter tube (505) extends into the first adapter tube (405). A disc (8) is provided above the second support platform (204), and a first adapter box (801) rotatably connected to the first adapter tube (405) and a second adapter box (802) rotatably connected to the second adapter tube (505) are fixed on the disc (8). A metal ring (803) is fixed on the disc (8) and is coaxially arranged with the second support platform (204), and the metal ring (803) slides in contact with the top end of the round rod (3).

7. The device for testing the insulation performance of a distribution cabinet according to claim 1, characterized in that, The handle (9) is rotatably fitted with a turntable (903) at one end near the contact ball (901), and a nozzle (904) is fixed at the edge of the turntable (903). A second servo motor (905) for driving the turntable (903) to rotate is fixed on the handle (9).

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