An insulation performance testing device for distribution cabinet

Abstract

This invention belongs to the field of electrical performance testing equipment, and specifically discloses an insulation performance testing device for a distribution cabinet. It includes: a cabinet; a double-headed hydraulic cylinder disposed within the cabinet, the double-headed hydraulic cylinder being equipped with an electric slide rail; an electric slider slidably connected to the electric slide rail of the double-headed hydraulic cylinder, an elastic telescopic rod rotatably connected to the electric slider, the telescopic end of the elastic telescopic rod being rotatably connected to a connecting frame; a circular plate rotatably connected to the connecting frame, the connecting frame being rotatably connected to a rotating shell, the rotating shell being provided with circumferentially uniformly distributed sliding cylinders, and probes slidably connected within the sliding cylinders. This invention, through the rotation of the double-headed hydraulic cylinder and the swinging of the elastic telescopic rod, combined with the extension operation of the probes, expands the weld inspection range and improves the integrity of weld inspection in the distribution cabinet. Simultaneously, the elastic telescopic rod enables the device to accurately and continuously inspect multiple welds, improving the continuity of the device's operation.

Description

Technical Field

[0001] This invention belongs to the field of electrical performance testing equipment, and in particular discloses an insulation performance testing device for power distribution cabinets. Background Technology

[0002] A distribution cabinet is a device used to receive and distribute power, control and protect electrical equipment. Existing distribution cabinets are usually manufactured through multiple steps, including design, material selection, cutting, bending, welding, assembly, and spraying insulating paint. Welding is used to fix the internal partitions of the distribution cabinet, while spraying insulating paint is used to improve the insulation performance of the cabinet.

[0003] In the prior art, a safety performance testing device for distribution cabinets, application number 202310245418.8, describes the following technical solution: the telescopic end of a horizontal electric push rod drives the detection wheel to move parallel, and in conjunction with the rotation of the detection wheel, several straight rods and contacts on the detection wheel sequentially contact the weld seams of the distribution cabinet, thereby completing the insulation test of the unevenly painted weld seams of the distribution cabinet at multiple contact points. Although this invention can test the insulation performance of the weld seams of the distribution cabinet, this testing method can only test a single weld seam, and then the testing position needs to be manually changed, which is cumbersome. Moreover, the weld seams of the distribution cabinet tested by this method have obvious blind spots, and the test results cannot fully represent the test results of the insulation performance of the distribution cabinet, affecting the accuracy of the insulation performance test results of the distribution cabinet. Summary of the Invention

[0004] To address the issues of incomplete insulation testing range and limited testing locations for weld seams in distribution cabinets, this invention provides an insulation performance testing device for distribution cabinets.

[0005] The technical implementation of this invention is as follows: an insulation performance testing device for a distribution cabinet, comprising: a cabinet; a double-headed hydraulic cylinder disposed within the cabinet, wherein a support plate is rotatably connected to the telescopic end of the double-headed hydraulic cylinder, and an electric slide rail is provided on the side wall of the double-headed hydraulic cylinder, the double-headed hydraulic cylinder being used to provide stable support during testing; an electric slider slidably connected to the electric slide rail on the side wall of the double-headed hydraulic cylinder, an elastic telescopic rod rotatably connected to the electric slider, and a connecting frame rotatably connected to the telescopic end of the elastic telescopic rod; the electric slider, the elastic telescopic rod, and the connecting frame are also included. The system includes: a circular plate rotatably connected to the connecting frame; a rotating shell rotatably connected to the circular plate; a circumferentially evenly distributed sliding cylinder on the rotating shell; a probe slidably connected inside the sliding cylinder; and a loop mechanism located on the outside of the cabinet to assist in completing the complete path detection of the cabinet. An auxiliary positioning mechanism located at the telescopic end of the elastic telescopic rod limits the rotation range of the connecting frame.

[0006] As a preferred embodiment of the present invention, the circuit mechanism includes: a test gauge disposed on the outside of the cabinet, the outside surface of the cabinet having a paint scraping opening, the test gauge being connected to a current testing connector and a wire, the current testing connector being fitted with the paint scraping opening on the cabinet, for forming a complete current circuit with the test gauge, the current testing connector, the wire, the cabinet, and the probe; and a power assembly disposed on a support plate on one side, the power assembly being used to control the connecting frame to move along a fixed trajectory.

[0007] As a preferred embodiment of the present invention, the power assembly includes: a first motor, fixedly connected to one side of the support plate, wherein the output shaft of the first motor is connected to the telescopic end of one side of the double-headed hydraulic cylinder via a gear set, and the first motor is used to control the rotation of the double-headed hydraulic cylinder; a first electric actuator, rotatably connected to the electric slider, wherein the telescopic end of the first electric actuator is rotatably connected to the elastic telescopic rod, and the first electric actuator is used to control the swing angle of the elastic telescopic rod; and a second motor, fixedly connected to the connecting frame, wherein the output shaft of the second motor is fixedly connected to the rotating shell, and the second motor is used to control the rotation angle of the rotating shell.

[0008] As a preferred embodiment of the present invention, the auxiliary positioning mechanism includes: a limiting frame fixedly connected to the telescopic end of the elastic telescopic rod, the limiting frame being slidably connected to a mirror-shaped arc-shaped rod, a spring being fixedly connected between the arc-shaped rod and the limiting frame, the mirror-shaped arc-shaped rods being pressed against the connecting frame, the arc-shaped rods and the limiting frame jointly limiting the swing range of the connecting frame; mirror-shaped limiting plates rotatably connected to the connecting frame, the circular plate being fixedly connected to the adjacent limiting plate, pressure sensing plates being provided on the limiting plates, the mirror-shaped limiting plates being used to assist the probe in positioning the weld seam; and a corner positioning component disposed on the connecting frame, the corner positioning component being used to eliminate the detection dead angle of the probe.

[0009] As a preferred embodiment of the present invention, the limiting plate is composed of a flat plate and a rotating column, the angle between the plane on which the limiting plate is located and the plane on which the limiting plate is located is 90°, and the intersection line of the plane on which the limiting plate is located intersects with the detection position of the adjacent probe, which is used to assist the probe in locating the weld position of the cabinet.

[0010] As a preferred embodiment of the present invention, the center of the trajectory of the arc-shaped rod coincides with the rotation axis of the connecting frame, and the arc-shaped rod is mirrored on the limiting frame to limit the rotation angle of the connecting frame to less than 90°, which is used to assist the connecting frame in quickly positioning the positions of the upper and lower welds inside the cabinet during the swinging process.

[0011] As a preferred embodiment of the present invention, the axis of rotation of the limiting plate is coincident with the axis of rotation of the rotating shell, so as to keep the relative position of the limiting plate and the rotating shell unchanged.

[0012] As a preferred embodiment of the present invention, the corner positioning assembly includes: a mirror-image second electric push rod, both fixedly connected to the circular plate; a fixing plate fixedly connected to each of the probes evenly distributed circumferentially; the telescopic end of the second electric push rod is pressed and engaged with the adjacent fixing plate through a connecting plate; a tension spring is fixedly connected between the sliding cylinder and the corresponding probe; the second electric push rod and the adjacent fixing plate together move the adjacent probe to position the corner of the weld.

[0013] As a preferred embodiment of the present invention, the second electric actuator is always positioned directly above one of the probes to expand the range of the probes that can detect welds inside the cabinet.

[0014] As a preferred embodiment of the present invention, it further includes: circumferentially evenly distributed limiting blocks, all fixedly connected inside the rotating shell; the sliding cylinder is slidably connected to the rotating shell; the number of limiting blocks is the same as the number of sliding cylinders; and a spring is fixedly connected between the limiting block and the adjacent sliding cylinder to ensure the contact state between the probe and the weld of the cabinet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention expands the range of weld inspection and improves the integrity of weld inspection of the distribution cabinet by rotating the double-headed hydraulic cylinder and swinging the elastic telescopic rod in conjunction with the extension operation of the probe. At the same time, the elastic telescopic rod enables the device to perform accurate and continuous inspection of multiple welds, thereby improving the continuity of the device's operation.

[0016] 2. The present invention assists the device in quickly completing the probe contact positioning of the weld seam through the limiting frame and the positioning support of the limiting plate in the auxiliary positioning mechanism, and makes the position of the subsequent weld seam connection detection positioning point more uniform, thereby improving the effectiveness of the detection results of the device.

[0017] 3. By rotating the sliding cylinder on the shell and using the elastic force of the spring connected to the limiting block, the present invention ensures that the probe keeps in contact with the detection points at different positions on the uneven weld, thus ensuring that the device can perform adaptive detection on different weld positions and improving the comprehensiveness of the detection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the components at the current measuring connector and the wire of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the parts at the first motor and the first electric actuator of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the connecting frame and the circular plate of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the second motor and the parts at the arc-shaped rod of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the sliding cylinder and probe parts of the present invention.

[0024] The meanings of the reference numerals in the diagram are as follows: 1-Cabinet, 2-Double-headed hydraulic cylinder, 3-Support plate, 4-Electric slider, 5-Elastic telescopic rod, 6-Connecting frame, 7-Circular plate, 8-Rotating shell, 9-Sliding cylinder, 10-Probe, 201-Detection gauge, 202-Electrical test connector, 203-Wire, 301-First motor, 302-First electric push rod, 303-Second motor, 401-Limiting frame, 402-Arc-shaped rod, 403-Limiting plate, 501-Second electric push rod, 502-Fixing plate, 601-Limiting block. Detailed Implementation

[0025] The following is combined with Figures 1-6The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

[0026] Example 1: During operation, the existing electrical distribution cabinet insulation performance testing device has limited movement distance, resulting in obvious blind spots in the detection of weld seams. This reduces the accuracy and effectiveness of the test results. In addition, the existing device can only test a single weld seam, requiring operators to adjust its position multiple times, which reduces the continuity of insulation testing.

[0027] An insulation performance testing device for distribution cabinets, please refer to... Figures 1-6 As shown, it includes: a cabinet 1; a double-headed hydraulic cylinder 2, which is installed inside the cabinet 1, with a support plate 3 rotatably connected to the telescopic end of the double-headed hydraulic cylinder 2, and an electric slide rail provided on the side wall of the double-headed hydraulic cylinder 2, which is used to provide stable support during the testing process; an electric slider 4, which is slidably connected to the electric slide rail on the side wall of the double-headed hydraulic cylinder 2, with an elastic telescopic rod 5 rotatably connected to the electric slider 4, and a connecting frame 6 rotatably connected to the telescopic end of the elastic telescopic rod 5, and the electric slider 4, the elastic telescopic rod 5 and the connecting frame 6 together position the position to be tested; A circular plate 7 is rotatably connected to a connecting frame 6. The connecting frame 6 is rotatably connected to a rotating shell 8, which is rotatably connected to the circular plate 7. A circumferentially evenly distributed sliding cylinder 9 is provided on the rotating shell 8. A probe 10 is slidably connected inside the sliding cylinder 9. The rotating shell 8 drives the probe 10 to rotate to complete multi-point detection of the cabinet 1. A loop mechanism is set on the outside of the cabinet 1. The loop mechanism is used to assist in completing the complete passage detection of the cabinet 1. An auxiliary positioning mechanism is set on the telescopic end of the elastic telescopic rod 5. The auxiliary positioning mechanism is used to limit the rotation range of the connecting frame 6.

[0028] The above solution aims to address the problem in existing insulation performance testing devices where the probe 10 does not completely detect the weld seams of distribution cabinets. This improves the representativeness of the insulation performance testing results and allows the device to continuously test weld seams of multiple distribution cabinets. The insulation performance testing equipment in this embodiment includes a double-headed hydraulic cylinder 2, which is externally connected to a hydraulic pump. A control panel (an existing mechanism, not shown in the figure) is mounted on the double-headed hydraulic cylinder 2. The double-headed hydraulic cylinder 2 is used to fix the working position of the device. The electric slider 4 slides up and down on the side wall of the double-headed hydraulic cylinder 2 via an electric slide rail, thereby changing the position of the probe 10 in detecting the weld seam of the distribution cabinet. The electric slider 4, the circuit mechanism, and the power component are all electrically connected to the control panel. The two telescopic ends of the double-headed hydraulic cylinder 2 are fixed inside the cabinet 1 near the weld seam to be detected by the support plate 3. The telescopic rod inside the elastic telescopic rod 5 is connected to its housing by a spline. The double-headed hydraulic cylinder 2 rotates itself to make the rotating shell 8 move at a constant speed from left to right along the weld seam, ensuring the comprehensiveness of the weld seam detection by this device.

[0029] Workflow: The operator first places the device near the weld to be inspected on cabinet 1. The device inspects the upper and lower welds between the two partitions on the rear side of cabinet 1. During this process, the rotating shell 8 on the connecting frame 6 first contacts and presses against the rear side of cabinet 1. As the double-headed hydraulic cylinder 2 moves into cabinet 1, the telescopic end of the elastic telescopic rod 5 retracts and stores force. Then, the operator starts the hydraulic pump, and the two telescopic ends of the double-headed hydraulic cylinder 2 extend synchronously. The double-headed hydraulic cylinder 2 is fixed inside cabinet 1 by two support plates 3. The hydraulic pump stops, and at this time, the electric slider 4 is located in the middle of the two welds to be inspected in the vertical direction. Then, the operator controls... The panel activates the electric slider 4, which moves upward. After the electric slider 4 has moved a certain distance, the connecting frame 6 approaches the weld seam on the upper side of the cabinet 1, and the electric slider 4 stops. Then, the power unit controls the elastic telescopic rod 5 to swing upward, and the telescopic end of the elastic telescopic rod 5 gradually extends. Under the action of the auxiliary positioning mechanism, the connecting frame 6 swings upward relative to the elastic telescopic rod 5. After the auxiliary positioning mechanism is fixed at the right angle of the weld seam of the cabinet 1, the probe 10 on the last side of the rotating shell 8 contacts the weld seam on the upper side of the inner side of the cabinet 1. Then, the power unit controls the double-headed hydraulic cylinder 2 to rotate, and the elastic telescopic rod 5 swings to the left, with the telescopic end of the elastic telescopic rod 5 maintaining the tendency to extend.

[0030] During the rotation of the double-headed hydraulic cylinder 2, when the connecting frame 6 moves to the leftmost side of the weld, the power unit stops rotating the double-headed hydraulic cylinder 2, and the circuit mechanism starts working. The circuit mechanism detects the insulation by contacting the probe 10 with the weld of the distribution cabinet. The corner positioning component controls the probe 10 on the left rear side to slide out from the corresponding sliding cylinder 9. The probe 10 contacts and detects the three intersections on the left side of the weld, ensuring the comprehensiveness of the weld detection. Afterwards, the power unit controls the double-headed hydraulic cylinder 2 to rotate again. The double-headed hydraulic cylinder 2 drives the elastic telescopic rod 5 to swing to the right. The telescopic end of the elastic telescopic rod 5 extends adaptively, causing the auxiliary positioning mechanism on the connecting frame 6 to contact and slide to the right at the right angle of the weld of the cabinet 1. During this process, the power unit controls the rotating shell 8 to rotate gradually. The probe 10, which contacts the weld point, is constantly switched to prevent relative sliding between the probe 10 and the weld, which could cause wear and damage to the weld. When the connecting frame 6 moves to the rightmost end of the upper weld inside the cabinet 1, the power unit stops rotating the double-headed hydraulic cylinder 2. The corner positioning component controls the right rear probe 10 to slide out from the corresponding sliding cylinder 9 and contact the three-sided intersection of the weld on the right side for detection. This completes the full inspection of a weld. Then, the control panel controls the electric slider 4 to move downward by twice the initial moving distance, and the power unit controls the elastic telescopic rod 5 to swing downward by twice its initial swing angle. The auxiliary positioning mechanism quickly completes the positioning of the lower weld inside the cabinet 1, enabling the device to continuously inspect welds and reducing the frequency of operator movement.

[0031] After the auxiliary positioning mechanism completes the positioning of the lower weld seam inside cabinet 1, the power component controls the double-headed hydraulic cylinder 2 to rotate in the opposite direction. The connecting frame 6 drives the rotating shell 8 to complete the inspection of the lower weld seam inside cabinet 1 from right to left. Finally, the power component controls the elastic telescopic rod 5 to swing upward to reset, the electric slider 4 to move to reset, and the hydraulic pump controls the two telescopic ends of the double-headed hydraulic cylinder 2 to retract, moving the device to the vicinity of the other two weld seams to be inspected in the distribution cabinet. The above inspection operation is repeated continuously to complete the insulation performance test of a distribution cabinet. All parts are in their initial positions.

[0032] Please refer to Figure 1 and Figure 2 As shown, the circuit mechanism includes: a test gauge 201, which is located on the outside of the cabinet 1. A paint scraping opening is provided on the outside of the cabinet 1. The test gauge 201 is connected to a current measuring connector 202 and a wire 203. The current measuring connector 202 is in contact with the paint scraping opening on the cabinet 1 to form a complete current circuit with the test gauge 201, the current measuring connector 202, the wire 203, the cabinet 1, and the probe 10; and a power assembly, which is located on a support plate 3 on one side. The power assembly is used to control the connecting frame 6 to move along a fixed trajectory.

[0033] In the above scheme, the main purpose is to provide current to the probe 10 so that the test meter 201, the test connector 202, the wire 203, the cabinet 1 and the probe 10 form a complete current loop, so as to achieve the purpose of quickly testing the insulation performance of the distribution cabinet. The wire 203 is electrically connected to several probes 10 that are evenly distributed around the periphery. When using the test meter 201, the operator needs to hold it for a long time and attach the test connector 202 to the body of the cabinet 1 under the insulating paint layer. Then, by checking whether the reading of the test meter 201 changes when the probe 10 comes into contact with the weld, the purpose of determining whether the insulation performance of the weld of the cabinet 1 is qualified is achieved. During the operation of this device, there is always one probe 10 in contact with the weld of the cabinet 1.

[0034] Please refer to Figure 2 , Figure 3 and Figure 5 As shown, the power assembly includes: a first motor 301, fixedly connected to a support plate 3 on one side, the output shaft of the first motor 301 is connected to the telescopic end of the double-headed hydraulic cylinder 2 via a gear set, and the first motor 301 is used to control the rotation of the double-headed hydraulic cylinder 2; a first electric push rod 302, rotatably connected to an electric slider 4, the telescopic end of the first electric push rod 302 is rotatably connected to an elastic telescopic rod 5, and the first electric push rod 302 is used to control the swing angle of the elastic telescopic rod 5; and a second motor 303, fixedly connected to a connecting frame 6, the output shaft of the second motor 303 is fixedly connected to a rotating shell 8, and the second motor 303 is used to control the rotation angle of the rotating shell 8.

[0035] In the above scheme, the main purpose is to assist in completing the fixed-angle rotation of the double-headed hydraulic cylinder 2, the fixed-angle swing of the elastic telescopic rod 5, and the fixed-angle rotation of the rotating shell 8. The first motor 301 causes the double-headed hydraulic cylinder 2 to rotate at a fixed angle through a gear set. While the double-headed hydraulic cylinder 2 is rotating, the support plate 3 is fixed relative to the cabinet 1. The first electric push rod 302 controls the elastic telescopic rod 5 to swing up and down by extending and retracting its telescopic end. Initially, the telescopic end of the first electric push rod 302 only extends halfway. The first electric push rod 302 is located below the elastic telescopic rod 5. The first motor 301, the first electric push rod 302, and the second motor 303 are all electrically connected to the control panel.

[0036] Workflow: When the device initially operates, the electric slider 4 moves upward a certain distance, and the control panel activates the first electric push rod 302. The telescopic end of the first electric push rod 302 extends, causing the elastic telescopic rod 5 to swing upward. After the auxiliary positioning mechanism completes positioning, the control panel closes the first electric push rod 302. Subsequently, the control panel activates the first motor 301. The first motor 301 rotates the double-headed hydraulic cylinder 2 through the gear set. After the connecting frame 6 moves to the leftmost left side of the upper weld seam inside the cabinet 1, the output shaft of the first motor 301 drives the double-headed hydraulic cylinder 2 to reverse. With the support of the auxiliary positioning mechanism, the connecting frame 6 drives the rotating shell 8 to move gradually to the right along the weld seam. At the same time, the control panel controls the output shaft of the second motor 303 to drive the rotating shell 8 to rotate. The rotation speed of the rotating shell 8 adapts to the relative movement speed between the connecting frame 6 and the weld seam. The probes 10 on the rotating shell 8 contact the weld seam points in sequence for detection, avoiding relative slippage when the probes 10 contact the weld seam, effectively ensuring the safety of the paint surface at the weld seam.

[0037] Please refer to Figure 4 and Figure 5 As shown, the auxiliary positioning mechanism includes: a limiting frame 401, fixedly connected to the telescopic end of the elastic telescopic rod 5; a mirror-shaped arc-shaped rod 402 slidably connected to the limiting frame 401; a spring fixedly connected between the arc-shaped rod 402 and the limiting frame 401; both mirror-shaped arc-shaped rods 402 are press-fitted with the connecting frame 6; the arc-shaped rods 402 and the limiting frame 401 together limit the swing range of the connecting frame 6; mirror-shaped limiting plates 403, rotatably connected to the connecting frame 6; a circular plate 7 fixedly connected to the adjacent limiting plate 403; pressure sensing plates are provided on the limiting plates 403; the mirror-shaped limiting plates 403 are used to assist the probe 10 in positioning the weld seam; and a corner positioning component, disposed on the connecting frame 6, used to eliminate the probe 10 The detection blind spot is eliminated. The limiting plate 403 consists of a flat plate and a rotating column. The angle between the plane where the flat plate of the mirror limiting plate 403 is located is 90°. The intersection line of the plane where the flat plate of the mirror limiting plate 403 is located intersects with the detection position of the adjacent probe 10. It is used to assist the probe 10 in positioning the weld position of the cabinet 1. The center of the trajectory of the arc rod 402 coincides with the rotation axis of the connecting frame 6. The mirror arc rod 402 on the limiting frame 401 limits the rotation angle of the connecting frame 6 to less than 90°. It is used to assist the connecting frame 6 in quickly positioning the position of the upper and lower welds inside the cabinet 1 during the swinging process. The rotation axis of the mirror limiting plate 403 coincides with the rotation axis of the rotating shell 8. It is used to keep the relative position of the limiting plate 403 and the rotating shell 8 unchanged.

[0038] In the above scheme, the main purpose is to assist the connecting frame 6 in driving the probe 10 to quickly approach and position the weld, control the force of the probe 10 contacting and squeezing the weld, speed up the detection of two welds by this device, and improve the accuracy of the insulation detection results of this device. The plane where the axis of several probes 10 is located has the same angle as the plane where the two limiting plates 403 are located, so that the contact point between several probes 10 and the weld is always located in the middle position of the weld. The pressure sensing plates on the limiting plates 403 are all electrically connected to the control panel.

[0039] Workflow: After the double-headed hydraulic cylinder 2 is fixed to the cabinet 1 via the two support plates 3, the two limiting plates 403 and the probe 10 on the last side of the rotating shell 8 are pressed against the inner rear side of the cabinet 1 by the thrust of the telescopic end of the elastic telescopic rod 5. When the elastic telescopic rod 5 swings upward for the first time, the two limiting plates 403 slide upward along the inner rear side of the cabinet 1, and the telescopic end of the elastic telescopic rod 5 gradually extends. The connecting frame 6 rotates upward relative to the elastic telescopic rod 5, and the connecting frame 6 pushes the upper arc rod 402. The arc rod 402 compresses the connected spring. As the elastic telescopic rod 5 swings, the connecting frame 6 is subjected to the elastic force of the spring connected to the upper arc rod 402. As the lower limit plate 403 swings downward relative to the rear side inside cabinet 1, it abuts against the rear side inside cabinet 1 and presses against the corresponding pressure sensing plate. Then, the upper limit plate 403 abuts against the upper side of the weld seam inside cabinet 1, and the pressure sensing plate on the upper limit plate 403 is pressed. The control panel stops the first electric push rod 302. At this time, the probe 10 on the last side of the rotating shell 8 aligns with the upper weld seam inside cabinet 1. Subsequently, the first motor 301 controls the double-headed hydraulic cylinder 2 to rotate, and the two limit plates 403 move to the right at a right angle along the weld seam of cabinet 1. The two limit plates 403 rotate relative to the connecting frame 6. After the device completes the detection of the upper weld seam, the control panel, through the first... An electric actuator 302 controls the elastic telescopic rod 5 to swing downwards. The lower limiting plate 403 slides downwards against the rear side of the cabinet 1. The limiting plate 403 drives the connecting frame 6 to swing downwards relative to the elastic telescopic rod 5. The lower arc-shaped rod 402 is compressed and compresses the connected spring. When the connecting frame 6 drives the lower arc-shaped rod 402 to move to the limit position of the limiting frame 401, as the elastic telescopic rod 5 continues to swing downwards, the elastic telescopic rod 5 rigidly drives the connecting frame 6 and the two limiting plates 403 to swing downwards through the limiting frame 401 and the arc-shaped rod 402. The lower limiting plate 403 loses its contact with the rear side of the cabinet 1, and the two limiting plates 403 gradually swing downwards. After the connecting frame 6 rotates 45°, the two limiting plates 403 continue to swing downwards. The upper limiting plate 403 is in contact with the rear side of the cabinet 1. As the elastic telescopic rod 5 swings downwards, the upper limiting plate 403 slides downwards along the rear side of the cabinet 1. After the lower limiting plate 403 is in contact with the lower side of the weld seam inside the cabinet 1, the control panel stops the first electric push rod 302. The positioning of the weld seam inside the lower side of the cabinet 1 is completed. When the device is removed after completing the inspection of the two weld seams, the limiting plate 403 loses contact and compression with the cabinet 1. The connecting frame 6 swings back to its original position under the elastic force of the spring connected to the corresponding arc rod 402, and the telescopic end of the elastic telescopic rod 5 extends out.

[0040] Please refer to Figure 5 and Figure 6As shown, the corner positioning assembly includes: a mirror-image second electric push rod 501, both fixed to the circular plate 7; a fixed plate 502 fixed to each of the circumferentially evenly distributed probes 10; the telescopic end of the second electric push rod 501 is pressed and engaged with the adjacent fixed plate 502 through a connecting plate; a tension spring is fixed between the sliding cylinder 9 and the corresponding probe 10; the second electric push rod 501 and the adjacent fixed plate 502 together move the adjacent probe 10 to position the corner of the weld; the second electric push rod 501 is always located directly above one of the probes 10, which is used to expand the range of the probe 10 detecting the weld inside the cabinet 1.

[0041] In the above scheme, the main purpose is to control one of the probes 10 to extend from the corresponding sliding cylinder 9 to complete the detection of the left and right corners of the weld, ensuring the comprehensiveness of the detection range of this device and improving the effectiveness of the detection effect. During the movement of the limiting plate 403 against the rear side of the cabinet 1, the two second electric push rods 501 are relatively fixed to the limiting plate 403 and rotate synchronously. The second electric push rods 501 are electrically connected to the control panel. During the operation of this device, when the connecting frame 6 is located at the left end of the weld through the two limiting plates 403, the control panel activates the left second electric push rod 501. The extension end of the second electric push rod 501 is connected to the connecting plate and the corresponding fixing plate 5. 02 drives the corresponding probe 10 to move, and the probe 10 slides out from the corresponding sliding cylinder 9. The probe 10 stretches the tension spring connected to it and contacts the left end of the weld to complete the detection. Then, the control panel controls the extension end of the second electric push rod 501 to retract and reset. The probe 10 resets under the tension of the connected tension spring. After that, when the connecting frame 6 moves to the right end of the upper weld inside the cabinet 1, the control panel activates the right second electric push rod 501. The right second electric push rod 501 drives the corresponding probe 10 to complete the detection of the right end of the upper weld inside the cabinet 1. Thus, the device completes the detection of one weld. After that, when the connecting frame 6 moves to the lower weld inside the cabinet 1, the above detection operation is repeated.

[0042] In the above embodiments, the connection between the sliding cylinder 9 and the rotating shell 8 can be considered as a fixed connection. However, in the following embodiments, the connection between the sliding cylinder 9 and the rotating shell 8 is a limited sliding connection.

[0043] Example 2: Based on Example 1, please refer to... Figure 6 As shown, it also includes: circumferentially distributed limiting blocks 601, all fixedly connected to the rotating shell 8; sliding cylinder 9 is slidably connected to the rotating shell 8; the number of limiting blocks 601 is the same as the number of sliding cylinders 9; and springs are fixedly connected between the limiting blocks 601 and the adjacent sliding cylinders 9 to ensure the contact state between the probe 10 and the weld of the cabinet 1.

[0044] In the above scheme, the aim is to address the problem that when the probe 10 detects the weld seam on the cabinet 1, the weld seam itself is uneven, causing the probe 10 to either fail to make contact or make excessive contact when detecting the weld seam. If the probe 10 is excessively squeezed against the weld seam, the positioning position of the limiting plate 403 and the probe 10 will be offset, resulting in a decrease in the accuracy and effectiveness of the detection results of this device. When the limiting plate 403 assists the probe 10 to move along the weld seam for detection, the probe 10 and the corresponding sliding cylinder 9 have initially extended out of the rotating shell 8. Due to the unevenness of the weld seam itself, when the probe 10 contacts and squeezes the weld seam, the probe 10 moves into the rotating shell 8 through the corresponding sliding cylinder 9 of the tension spring. The sliding cylinder 9 compresses the spring between itself and the corresponding limiting block 601. When the probe 10 loses contact with the weld seam, the probe 10 and the corresponding sliding cylinder 9 move back to their original position under the elastic force of the connected spring. Through the action of the limiting block 601 and the spring connected to it, the probe 10 in this device can accurately contact and detect the uneven weld seam, ensuring the effectiveness of the detection results of this device.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An insulation performance testing device for a distribution cabinet, characterized in that: include: Cabinet (1); A double-headed hydraulic cylinder (2) is installed inside the cabinet (1). The telescopic end of the double-headed hydraulic cylinder (2) is rotatably connected to a support plate (3). An electric slide rail is provided on the side wall of the double-headed hydraulic cylinder (2). The double-headed hydraulic cylinder (2) is used to provide stable support during the testing process. An electric slider (4) is slidably connected to an electric slide rail on the side wall of the double-headed hydraulic cylinder (2). An elastic telescopic rod (5) is rotatably connected to the electric slider (4). A connecting frame (6) is rotatably connected to the telescopic end of the elastic telescopic rod (5). The electric slider (4), the elastic telescopic rod (5), and the connecting frame (6) together position the location to be detected. A circular plate (7) is rotatably connected to the connecting frame (6). The connecting frame (6) is rotatably connected to a rotating shell (8) that is rotatably connected to the circular plate (7). A sliding cylinder (9) is evenly distributed around the circumference on the rotating shell (8). A probe (10) is slidably connected inside the sliding cylinder (9). The rotating shell (8) drives the probe (10) to rotate to complete the detection of the cabinet (1). A loop mechanism is provided on the outside of the cabinet (1), and the loop mechanism is used to assist in completing the complete path detection of the cabinet (1); An auxiliary positioning mechanism is provided at the telescopic end of the elastic telescopic rod (5), and the auxiliary positioning mechanism is used to limit the rotation range of the connecting frame (6); The auxiliary positioning mechanism includes a corner positioning component, which is disposed on the connecting frame (6) and is used to eliminate the detection dead angle of the probe (10); The corner positioning component includes: The mirrored second electric push rod (501) is fixedly connected to the circular plate (7). The probes (10) that are evenly distributed in the circumference are all fixedly connected to the fixing plates (502). The telescopic end of the second electric push rod (501) is pressed and engaged with the adjacent fixing plate (502) through the connecting plate. A tension spring is fixedly connected between the sliding cylinder (9) and the corresponding probe (10). The second electric push rod (501) and the adjacent fixing plate (502) together move the adjacent probe (10) to the corner of the positioning weld.

2. The insulation performance testing device for a distribution cabinet according to claim 1, characterized in that: The loop mechanism includes: The test gauge (201) is set on the outside of the cabinet (1). The outside surface of the cabinet (1) is provided with a paint scraping opening. The test gauge (201) is connected to a test connector (202) and a wire (203). The test connector (202) fits into the paint scraping opening on the cabinet (1) to make the test gauge (201), the test connector (202), the wire (203), the cabinet (1) and the probe (10) form a complete current loop. A power assembly is mounted on the support plate (3) on one side, and the power assembly is used to control the connecting frame (6) to move along a fixed trajectory.

3. An insulation performance testing device for a distribution cabinet according to claim 2, characterized in that: The power assembly includes: The first motor (301) is fixed to the support plate (3) on one side. The output shaft of the first motor (301) is connected to the telescopic end on one side of the double-headed hydraulic cylinder (2) through a gear set. The first motor (301) is used to control the rotation of the double-headed hydraulic cylinder (2). The first electric actuator (302) is rotatably connected to the electric slider (4). The telescopic end of the first electric actuator (302) is rotatably connected to the elastic telescopic rod (5). The first electric actuator (302) is used to control the swing angle of the elastic telescopic rod (5). The second motor (303) is fixedly connected to the connecting frame (6). The output shaft of the second motor (303) is fixedly connected to the rotating shell (8). The second motor (303) is used to control the rotation angle of the rotating shell (8).

4. An insulation performance testing device for a distribution cabinet according to claim 3, characterized in that: The auxiliary positioning mechanism includes: A limiting frame (401) is fixed to the telescopic end of the elastic telescopic rod (5). The limiting frame (401) is slidably connected to a mirror-shaped arc rod (402). A spring is fixed between the arc rod (402) and the limiting frame (401). The mirror-shaped arc rods (402) are both pressed against the connecting frame (6). The arc rods (402) and the limiting frame (401) together limit the swing range of the connecting frame (6). The mirror-shaped limiting plates (403) are rotatably connected to the connecting frame (6). The circular plate (7) is fixedly connected to the adjacent limiting plates (403). The limiting plates (403) are provided with pressure sensing plates. The mirror-shaped limiting plates (403) are used to assist the probe (10) in positioning the weld position.

5. An insulation performance testing device for a distribution cabinet according to claim 4, characterized in that: The limiting plate (403) consists of a flat plate and a rotating column. The angle between the plane on which the limiting plate (403) is located and the plane on which the limiting plate (403) is located is 90°. The line of intersection of the plane on which the limiting plate (403) is located intersects with the detection position of the adjacent probe (10), which is used to assist the probe (10) in locating the weld position of the cabinet (1).

6. An insulation performance testing device for a distribution cabinet according to claim 5, characterized in that: The center of the trajectory of the arc rod (402) coincides with the rotation axis of the connecting frame (6). The limiting frame (401) mirrors the arc rod (402) to limit the rotation angle of the connecting frame (6) to less than 90°, which is used to assist the connecting frame (6) in quickly positioning the positions of the upper and lower welds inside the cabinet (1) during the swinging process.

7. An insulation performance testing device for a distribution cabinet according to claim 6, characterized in that: The axis of rotation of the mirror-image limiting plate (403) coincides with the axis of rotation of the rotating shell (8), so as to keep the relative position of the limiting plate (403) and the rotating shell (8) unchanged.

8. An insulation performance testing device for a distribution cabinet according to claim 7, characterized in that: The second electric actuator (501) is always positioned directly above one of the probes (10) to expand the range of the probe (10) that detects the weld seam inside the cabinet (1).

9. An insulation performance testing device for a distribution cabinet according to claim 8, characterized in that: It also includes: The circumferentially distributed limiting blocks (601) are all fixed inside the rotating shell (8). The sliding cylinder (9) is slidably connected to the rotating shell (8). The number of limiting blocks (601) is the same as the number of sliding cylinders (9). A spring is fixed between the limiting block (601) and the adjacent sliding cylinder (9) to ensure the contact state between the probe (10) and the weld of the cabinet (1).

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