A high-voltage motor insulation monitoring device and a monitoring method thereof

Abstract

The application relates to the field of insulation monitoring devices, and discloses a high-voltage motor insulation monitoring device and a monitoring method thereof, which effectively solve the problem that it is difficult to determine the leakage position when the insulation condition of a high-voltage motor is monitored, and the device comprises a base, a segmented lifting assembly is arranged at the top of the base, the segmented lifting assembly comprises a supporting plate which is equidistantly arranged above the base, the supporting plate is made of an insulating material, the supporting plate is arranged in a semicircular ring shape, a conductive plate is arranged on the inner wall of the circular arc of the supporting plate, an insulation monitoring assembly is arranged on the front of the supporting plate, a leakage protection assembly is arranged on the back of the supporting plate, the insulation monitoring assembly comprises a conductive rod which is arranged on the front of the supporting plate, the conductive rod is arranged in an L shape, one end of the conductive rod is connected with the conductive plate, and the application has the advantages that when leakage exists at a certain position of the high-voltage motor shell, the current is discharged to the ground from the grounding wire, an induced current is generated in the current transformer, an alarm is sent by the alarm device, and the staff is warned.

Description

Technical Field

[0001] This invention belongs to the field of insulation monitoring devices, specifically a high-voltage motor insulation monitoring device and its monitoring method. Background Technology

[0002] According to the patent document with authorization announcement number "CN214845461U" and invention title "An Insulation Monitoring System for a Crane Motor", the description states: Pressing down on the support plate causes it to move downwards and compress the spring. Rotating the screw causes its lower end to screw into the screw hole on the upper surface of the fixed seat, fixing the support plate. The crane motor is then placed on two mounting seats and fixed through the mounting holes. Reversing the screw causes it to separate from the fixed seat. At this point, the spring's elasticity pushes the support plate upwards, causing the conductive plate on the support plate to contact the crane motor's outer casing. The lower end of the grounding wire is then connected to the ground. When the crane motor's insulation is insufficient and the outer casing becomes energized, the grounding wire conducts the charge from the crane motor's outer casing to the ground. When the grounding wire is conductive, a significant internal charge is generated. When current flows through a current transformer, an induced current is also generated in the circuit between the current transformer and the audible and visual alarm. This causes the audible and visual alarm to activate, emitting sound and light to alert people that the crane motor's insulation is insufficient and leakage has occurred. Simultaneously, an ammeter can be used to detect the current in the circuit between the current transformer and the audible and visual alarm, allowing people to clearly observe the magnitude of the induced current. However, similar to crane motors, high-voltage motors, during operation, are subject to the influence of the external environment and wear and tear, which can reduce their insulation capacity. This can cause the high-voltage motor's casing to become electrified during operation. When the casing becomes electrified, people may not notice it in time, leading to accidental electric shock and posing a serious health hazard. However, the following defects still exist...

[0003] When monitoring the insulation of high-voltage motors, it is not easy to determine the location of leakage, which requires staff to conduct extensive testing, resulting in poor testing results. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a high-voltage motor insulation monitoring device and monitoring method, which effectively solves the problem that it is not easy to determine the leakage location when monitoring the insulation of high-voltage motors.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage motor insulation monitoring device and its monitoring method, comprising a base, wherein a segmented support assembly is installed at the top of the base;

[0006] The segmented lifting assembly includes equidistant support plates above the base. The support plates are made of insulating material and are arranged in a semi-circular shape. A conductive plate is installed on the inner arc wall of the support plate. An insulation monitoring assembly is installed on the front of the support plate, and a leakage current protection assembly is installed on the back of the support plate.

[0007] The insulation monitoring assembly includes a conductive rod mounted on the front of the tray. The conductive rod is L-shaped and one end is connected to a conductive plate. A longitudinal cylinder is provided on the front of the tray and is fixedly mounted on the top of the base. The conductive rod is movably mounted inside the longitudinal cylinder. A contact is installed on the inner bottom wall of the longitudinal cylinder. A grounding wire is installed on the front of the longitudinal cylinder. One end of the grounding wire is connected to the contact, and the other end of the grounding wire is grounded. A current transformer is sleeved on the outside of the grounding wire. A mounting base is installed at the bottom of the current transformer, and an alarm is installed on the mounting base. The alarm is connected in series with the current transformer.

[0008] Preferably, longitudinal plates are symmetrically installed at both ends of the pallet, the longitudinal plates are arranged longitudinally, and fixing bolts are threaded on the longitudinal plates.

[0009] Preferably, the bottom end of the pallet is symmetrically provided with fixed boxes, and the two fixed boxes are fixedly installed on the base. The fixed boxes are movably installed with movable plates inside, and the top ends of the movable plates are symmetrically provided with support rods. The support rods extend through to the top end of the fixed boxes and are fixedly connected to the bottom wall of the pallet. The bottom ends of the movable plates are symmetrically provided with first springs, and the bottom ends of the first springs are fixedly connected to the inner bottom wall of the fixed boxes. A connecting block is installed between the two fixed boxes, and a fixing and stabilizing component is installed between the pallet and the connecting block.

[0010] Preferably, the fixing and stabilizing component includes a slot at the top center of the connecting block, two first positioning grooves on both sides of the slot, the two first positioning grooves extending through to both sides of the connecting block respectively, an insert block installed at the bottom of the support plate, a second positioning groove inside the insert block, the two ends of the second positioning groove extending through to both sides of the insert block respectively, and the diameter of the second positioning groove being the same as the diameter of the first positioning groove.

[0011] Preferably, a support seat is installed at the top of the base, and a transverse cylinder is installed at the top of the support seat. The transverse cylinder is located on one side of the end connecting block. A limited displacement block is movably installed inside the transverse cylinder. A positioning rod is installed on the side of the limited displacement block near the connecting block. The diameter of the positioning rod is the same as the diameter of the first positioning groove. The central axis of the positioning rod is on the same straight line as the central axis of the first positioning groove. A top groove is opened at the top of the transverse cylinder. A push plate is installed at the top of the limited displacement block. The push plate is slidably connected to the top groove.

[0012] Preferably, the front of the displacement limiting block is provided with a slot, and a fixed cylinder is installed on the front of the transverse cylinder. The fixed cylinder is located at the end of the transverse cylinder near the connecting block. A movable block is movably installed inside the fixed cylinder. A locking rod is installed on the side of the movable block near the transverse cylinder, and the locking rod penetrates into the interior of the transverse cylinder. A second spring is installed on the side of the movable block away from the transverse cylinder. One end of the second spring is fixedly connected to the inner wall of the end of the fixed cylinder away from the transverse cylinder. A pull rod is installed on the side of the movable block away from the locking rod, and the pull rod penetrates into the outer side of the fixed cylinder.

[0013] Preferably, the leakage current protection component includes a back platform disposed on the back of the tray, the back platform being fixedly installed on the base, a rotating seat being installed on the top of the back platform near the tray, a connecting plate being rotatably installed on the rotating seat, a cover plate being installed on the top of the connecting plate, the cover plate being made of insulating material and being arranged in a semi-circular shape, a back plate being installed on the top of the back platform away from the tray, a first horizontal plate being installed on the side of the back plate near the cover plate, and a snap-fit ​​groove being opened at the top of the first horizontal plate.

[0014] Preferably, a second horizontal plate is installed on the side of the cover plate near the back plate, the second horizontal plate is located above the first horizontal plate, a top cylinder is installed at the top of the second horizontal plate, a sliding block is movably installed inside the top cylinder, a locking rod is installed at the bottom of the sliding block, the bottom of the locking rod extends to the bottom of the second horizontal plate, the locking rod engages with the locking groove, a third spring is installed at the bottom of the sliding block, the bottom of the third spring is fixedly connected to the inner bottom wall of the top cylinder, a magnetic block is installed at the top of the sliding block, an electromagnet is installed at the top of the top cylinder, a side through groove is opened on the side of the top cylinder away from the cover plate, a solenoid valve switch is installed at the top of the top cylinder, the solenoid valve switch controls the circuit opening and closing of the electromagnet, and the solenoid valve switch is connected in series with a current transformer.

[0015] Preferably, a horizontal cylinder is installed above the top cylinder on the side away from the cover plate. A bottom through groove is opened at the bottom end of the horizontal cylinder. A horizontal sliding plate is slidably installed inside the horizontal cylinder. A rotating rod is hinged to the bottom end of the horizontal sliding plate. The other end of the rotating rod is hinged to a sliding block. A top plate is provided on the side of the horizontal sliding plate away from the cover plate. The top plate is slidably installed inside the horizontal cylinder. An internal groove is symmetrically opened inside the top plate. An internal block is movably installed inside the internal groove. A crossbar is installed on the side of the internal block near the horizontal sliding plate. One end of the crossbar is fixedly connected to the horizontal sliding plate. A fourth spring is installed on the side of the internal block away from the horizontal sliding plate.

[0016] A preferred method for monitoring the insulation of a high-voltage motor includes the following monitoring steps:

[0017] 1. Place the high-voltage motor on multiple trays, and screw the two fixing bolts on the trays into the threaded grooves on the high-voltage motor to fix the high-voltage motor.

[0018] 2. The pallet moves downward under the pressure of the high-voltage motor, causing the insert block to be inserted into the slot on the connecting block, pushing the positioning rod to move, so that the positioning rod is inserted into the first positioning slot and the second positioning slot, thus fixing the pallet;

[0019] 3. The pallet moves downward, causing the conductive rod to move downward, so that the conductive rod contacts the contact point on the inner bottom wall of the longitudinal cylinder, one end of the conductive rod contacts the conductive plate, and the other end of the grounding wire is grounded.

[0020] IV. When there is leakage in the casing of the high-voltage motor, the current is conducted to the ground through the conductive plate, conductive rod and grounding wire. A current transformer is installed on the outside of the grounding wire. When the current flows through the grounding wire, the current transformer generates an induced current. The current transformer is connected in series with the alarm, which causes the alarm to sound. At the same time, multiple plates are set up to detect the leakage location of the high-voltage motor.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) In this invention, when there is a leakage at a certain point on the casing of a high-voltage motor, the current flows from the grounding wire to the ground and causes the current transformer to generate an induced current, which causes the alarm to sound and alerts the staff. Since each pallet is equipped with an insulation monitoring component, when the alarm on the corresponding pallet sounds, it indicates that there is a leakage danger at the casing of the high-voltage motor at the corresponding position, which is convenient for the staff to inspect and repair.

[0023] (2) The invention adapts the number of trays used to the length of the high-voltage motor. The trays in contact with the high-voltage motor move downward under pressure, causing the conductive rods on the corresponding trays to move downward and thus connect electrically with the grounding wire. As a result, the alarm corresponding to the tray with the high-voltage motor installed can sound an alarm under the action of induced current, which is convenient to use and reduces the possibility of accidental activation.

[0024] (3) The invention moves the tray downward so that the insert block is inserted into the slot on the connecting block, so that the second positioning groove on the insert block corresponds to the first positioning groove on both sides of the slot. Pulling the positioning rod moves the positioning rod so that it is engaged in the first positioning groove and the second positioning groove, thereby fixing the tray and fixing the high voltage motor on the tray, thus improving the working stability of the high voltage motor.

[0025] (4) The invention controls the on / off state of the electromagnet circuit through a solenoid valve switch. The solenoid valve switch is connected in series with the current transformer. When the current transformer generates an induced current, the solenoid valve switch is energized to connect the circuit where the electromagnet is located. The electromagnet attracts the magnetic block, causing the locking rod to move upward and disengage from the locking groove. This also causes the fourth spring to press. At the moment when the locking rod disengages from the locking groove, the cover plate rotates towards the support plate under the elastic force of the fourth spring, shielding the part of the high-voltage motor that is leaking electricity, reducing the contact between the worker and the location of the high-voltage motor that is leaking electricity, and protecting the worker. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the high-voltage motor insulation monitoring device of the present invention;

[0029] Figure 2 This is a schematic diagram of the segmented lifting component structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the insulation monitoring component structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the transverse cylinder structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the lever structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the leakage current protection component of the present invention;

[0034] Figure 7 This is a schematic diagram of the back support structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the cover plate structure of the present invention;

[0036] Figure 9 This is a schematic diagram of the top plate structure of the present invention;

[0037] Figure 10 This is a circuit diagram of the present invention;

[0038] In the diagram: 1. Base; 2. Segmented lifting assembly; 201. Support plate; 202. Longitudinal plate; 203. Fixing bolt; 204. Conductive plate; 205. Fixing box; 206. Movable plate; 207. Support rod; 208. First spring; 209. Connecting block; 3. Fixing and stabilizing assembly; 301. Slot; 302. First positioning slot; 303. Insert block; 304. Second positioning slot; 305. Support base; 306. Transverse cylinder; 307. Displacement limiting block; 308. Positioning rod; 309. Top slot; 310. Push plate; 311. Slot; 312. Fixing cylinder; 313. Moving block; 314. Locking rod; 315. Second spring; 316. Pull rod; 4. Insulation monitoring assembly; 401. Conductive rod; 402. Longitudinal cylinder; 403, Grounding wire; 404, Mounting base; 405, Current transformer; 406, Alarm; 5, Leakage protection assembly; 501, Back panel; 502, Rotary seat; 503, Connecting plate; 504, Cover plate; 505, Back plate; 506, First horizontal plate; 507, Snap-fit ​​groove; 508, Second horizontal plate; 509, Top cylinder; 510, Sliding block; 511, Snap-fit ​​rod; 512, Third spring; 513, Magnetic block; 514, Electromagnet; 515, Horizontal cylinder; 516, Horizontal sliding plate; 517, Bottom through groove; 518, Rotating rod; 519, Side through groove; 520, Solenoid valve switch; 521, Top plate; 522, Internal groove; 523, Internal block; 524, Horizontal bar; 525, Fourth spring. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Example 1, by Figures 1-10 As shown, the present invention includes a base 1, and a segmented lifting assembly 2 is installed on the top of the base 1;

[0041] The segmented lifting assembly 2 includes support plates 201 equidistantly positioned above the base 1. The support plates 201 are made of insulating material and are arranged in a semi-circular shape. A conductive plate 204 is installed on the inner arc of the support plate 201. An insulation monitoring assembly 4 is installed on the front of the support plate 201, and a leakage current protection assembly 5 is installed on the back of the support plate 201. Longitudinal plates 202 are symmetrically installed at both ends of the support plate 201, arranged longitudinally. Fixing bolts 203 are threaded onto the longitudinal plates 202. Fixing boxes 205 are symmetrically provided at the bottom of the support plate 201. 05 is fixedly installed on the base 1. Inside the fixed box 205, a movable plate 206 is movably installed. Support rods 207 are symmetrically installed on the top of the movable plate 206. The support rods 207 extend through to the top of the fixed box 205. The support rods 207 are fixedly connected to the bottom wall of the support plate 201. A first spring 208 is symmetrically installed at the bottom of the movable plate 206. The bottom of the first spring 208 is fixedly connected to the inner bottom wall of the fixed box 205. A connecting block 209 is installed between the two fixed boxes 205. A fixing and stabilizing component 3 is installed between the support plate 201 and the connecting block 209.

[0042] The insulation monitoring component 4 includes a conductive rod 401 mounted on the front of the support plate 201. The conductive rod 401 is L-shaped, and one end of the conductive rod 401 is connected to the conductive plate 204. A longitudinal cylinder 402 is provided on the front of the support plate 201. The longitudinal cylinder 402 is fixedly mounted on the top of the base 1. The conductive rod 401 is movably mounted inside the longitudinal cylinder 402. A contact is installed on the inner bottom wall of the longitudinal cylinder 402. A grounding wire 403 is installed on the front of the longitudinal cylinder 402. One end of the grounding wire 403 is connected to the contact, and the other end of the grounding wire 403 is grounded. A current transformer 405 is sleeved on the outside of the grounding wire 403. A mounting base 404 is installed at the bottom of the current transformer 405. An alarm 406 is installed on the mounting base 404. The alarm 406 and the current transformer 405 are connected in series. When there is a leak at a certain point on the high-voltage motor casing... When electricity is applied, current flows from the grounding wire 403 to the ground, and induces a current in the current transformer 405, causing the alarm 406 to sound an alarm and alert the staff. Since each tray 201 is equipped with an insulation monitoring component 4, when the alarm 406 on the corresponding tray 201 sounds an alarm, it indicates that there is a leakage hazard at the high-voltage motor casing at the corresponding position, facilitating inspection and maintenance by the staff. The number of trays 201 used is adapted to the length of the high-voltage motor. The tray 201 in contact with the high-voltage motor moves downward under pressure, causing the conductive rod 401 on the corresponding tray 201 to move downward, thereby electrically connecting with the grounding wire 403. Thus, the alarm 406 corresponding to the tray 201 on which the high-voltage motor is installed can sound an alarm under the action of the induced current, making it convenient to use and reducing the possibility of accidental activation.

[0043] The fixing and stabilizing component 3 includes a slot 301 located at the center of the top of the connecting block 209. First positioning grooves 302 are formed on both sides of the slot 301, extending through to both sides of the connecting block 209. An insert block 303 is mounted at the bottom of the support plate 201. A second positioning groove 304 is formed inside the insert block 303, extending through to both sides of the insert block 303. The diameter of the second positioning groove 304 is the same as the diameter of the first positioning groove 302. A support base 305 is mounted at the top of the base 1, and a horizontal... A transverse cylinder 306 is located on one side of the end connecting block 209. A limited displacement block 307 is movably installed inside the transverse cylinder 306. A positioning rod 308 is installed on the side of the limited displacement block 307 near the connecting block 209. The diameter of the positioning rod 308 is the same as the diameter of the first positioning groove 302, and the central axis of the positioning rod 308 is on the same straight line as the central axis of the first positioning groove 302. A top groove 309 is formed at the top of the transverse cylinder 306. A push plate 310 is installed at the top of the limited displacement block 307. The push plate 310 is slidably connected to the top groove 309. A slot 311 is provided on the front of the transverse cylinder 306. A fixed cylinder 312 is installed on the front of the transverse cylinder 306, located at the end of the transverse cylinder 306 near the connecting block 209. A movable block 313 is movably installed inside the fixed cylinder 312. A locking rod 314 is installed on the side of the movable block 313 near the transverse cylinder 306, penetrating into the interior of the transverse cylinder 306. A second spring 315 is installed on the side of the movable block 313 away from the transverse cylinder 306. One end of the second spring 315 is fixedly connected to the inner wall of the end of the fixed cylinder 312 away from the transverse cylinder 306. A pull rod 316 is installed on one side of the rod 314. The pull rod 316 extends to the outside of the fixed cylinder 312. The support plate 201 moves downward, so that the insert block 303 is inserted into the slot 301 on the connecting block 209, so that the second positioning groove 304 on the insert block 303 corresponds to the first positioning groove 302 on both sides of the slot 301. The positioning rod 308 is pulled to move, so that the positioning rod 308 is engaged in the first positioning groove 302 and the second positioning groove 304, thereby fixing the support plate 201 and fixing the high-voltage motor on the support plate 201, thereby improving the working stability of the high-voltage motor.

[0044] The leakage current protection component 5 includes a back platform 501 located on the back of the support plate 201. The back platform 501 is fixedly mounted on the base 1. A rotating seat 502 is mounted on the top of the back platform 501 near the support plate 201. A connecting plate 503 is rotatably mounted on the rotating seat 502. A cover plate 504 is mounted on the top of the connecting plate 503. The cover plate 504 is made of insulating material and is semi-circular in shape. A back plate 505 is mounted on the top of the back platform 501 away from the support plate 201. A first horizontal plate 506 is mounted on the back plate 505 near the cover plate 504. A snap-fit ​​groove 507 is formed at the top of the first horizontal plate 506. A second horizontal plate 508 is mounted on the cover plate 504 near the back plate 505. The second horizontal plate 508 is located on the first horizontal plate 506. Above, a top cylinder 509 is installed at the top of the second horizontal plate 508. A sliding block 510 is movably installed inside the top cylinder 509. A locking rod 511 is installed at the bottom of the sliding block 510, and the bottom end of the locking rod 511 extends to the bottom end of the second horizontal plate 508. The locking rod 511 engages with the locking groove 507. A third spring 512 is installed at the bottom of the sliding block 510, and the bottom end of the third spring 512 is fixedly connected to the inner bottom wall of the top cylinder 509. A magnet 513 is installed at the top of the sliding block 510, and an electromagnet 514 is installed at the top of the top cylinder 509. A side passage groove 519 is opened on the side of the top cylinder 509 away from the cover plate 504. A solenoid valve switch 520 is installed at the top of the top cylinder 509, and the solenoid valve switch 520 controls the circuit opening and closing of the electromagnet 514. The control system includes a solenoid valve switch 520 connected in series with a current transformer 405. A horizontal cylinder 515 is installed above the top cylinder 509 on the side away from the cover plate 504. A bottom through groove 517 is formed at the bottom end of the horizontal cylinder 515. A transverse sliding plate 516 is slidably installed inside the horizontal cylinder 515. A rotating rod 518 is hinged to the bottom end of the transverse sliding plate 516, and the other end of the rotating rod 518 is hinged to a sliding block 510. A top plate 521 is provided on the side of the transverse sliding plate 516 away from the cover plate 504. The top plate 521 is slidably installed inside the horizontal cylinder 515. Symmetrically symmetrical internal grooves 522 are formed inside the top plate 521. An internal block 523 is movably installed inside the internal groove 522. A crossbar 524 is installed on the side of the internal block 523 near the transverse sliding plate 516. One end is fixedly connected to the transverse sliding plate 516. A fourth spring 525 is installed on the side of the internal block 523 away from the transverse sliding plate 516. The solenoid valve switch 520 controls the on / off state of the electromagnet 514 circuit. The solenoid valve switch 520 is connected in series with the current transformer 405. When the current transformer 405 generates an induced current, the solenoid valve switch 520 is energized to connect the circuit where the electromagnet 514 is located. The electromagnet 514 generates an attractive force on the magnetic block 513, causing the locking rod 511 to move upward and disengage from the locking groove 507, and causing the fourth spring 525 to be pressed. At the moment when the locking rod 511 disengages from the locking groove 507, under the elastic force of the fourth spring 525, the cover plate 504 rotates towards the support plate 201 to shield the part of the high-voltage motor that is leaking electricity.Minimize contact between workers and locations where high-voltage motors leak electricity, and protect workers accordingly.

[0045] Working principle: When in use, the high-voltage motor is placed on multiple trays 201. The number of trays 201 is matched with the length of the high-voltage motor. The longer the high-voltage motor, the fewer trays 201 are used. After placing the high-voltage motor in the trays 201, the two fixing bolts 203 on the trays 201 are screwed into the threaded grooves on the high-voltage motor to fix the high-voltage motor.

[0046] After the high-voltage motor is installed, the support plate 201 moves downward under the pressure of the high-voltage motor, causing the insert block 303 to be inserted into the slot 301 on the connecting block 209. Then, the push plate 310 is pushed along the top groove 309, causing the positioning rod 308 to move towards the connecting block 209 and pass through each of the first positioning slots 302. When the high-voltage motor is located at the top of the support plate 201, the positioning rod 308 passes through the second positioning slot 304 on the insert block 303 that has entered the slot 301, thereby fixing the support plate 201 and improving the working efficiency of the high-voltage motor. For stability, when the displacement limiting block 307 is about to reach the vicinity of the fixed cylinder 312, the pull rod 316 is pulled outward, so that the locking rod 314 enters the interior of the fixed cylinder 312. When the fixed cylinder 312 is about to reach the limit position of the transverse cylinder 306 near the connecting block 209, the pull rod 316 is released, so that the locking rod 314 moves back under the elastic force of the second spring 315, so that the locking rod 314 is locked into the slot 311 on the displacement limiting block 307, thereby fixing the positioning rod 308, thereby further improving the fixing stability of the high voltage motor.

[0047] When the pallet 201 moves downward, the conductive rod 401 on the pallet 201 moves downward with the pallet 201, so that the bottom end of the conductive rod 401 contacts the contact point inside the longitudinal cylinder 402, so that the circuit connection between the grounding wire 403 and the conductive plate 204 is established. When there is a leakage at a certain point on the high-voltage motor casing, the conductive plate 204, the conductive rod 401 and the grounding wire 403 discharge the leaked current to the ground, thereby improving work safety. At the same time, when the current passes through the grounding wire 403, the current transformer 405 generates an induced current, causing the alarm 406 to sound an alarm, warning the staff. Meanwhile, since each pallet 201 is equipped with an insulation monitoring component 4, when the alarm 406 on the corresponding pallet 201 sounds an alarm, it indicates that there is a leakage hazard at the corresponding position of the high-voltage motor casing, which is convenient for the staff to inspect and maintain.

[0048] When the current transformer 405 generates an induced current, the current transformer 405, the alarm 406, and the solenoid valve switch 520 are connected in series, thus energizing the solenoid valve switch 520. The solenoid valve switch 520 controls the on / off state of the electromagnet 514 circuit. After the solenoid valve switch 520 is energized, the electromagnet 514 is connected and generates magnetic force, which attracts the magnetic block 513, pulling the locking rod 511 upward, causing the locking rod 511 to disengage from the locking slot 507. At the same time, the sliding block 510 moves upward, pushing the transverse plate 516 towards the back plate 505 via the rotating rod 518. The end of the top plate 521 contacts the back plate 505, causing the transverse plate 516 to move toward the top plate 521, which in turn compresses the fourth spring 525. After the locking rod 511 disengages from the locking groove 507, the elastic force of the fourth spring 525 generates a pushing force on the cover plate 504 toward the support plate 201. This pushes the connecting plate 503 at the bottom of the cover plate 504 to rotate around the rotating seat 502 toward the support plate 201, so that the cover plate 504 covers the top of the high-voltage motor, shielding the leakage part of the high-voltage motor, reducing the contact between the operator and the leakage location of the high-voltage motor, and protecting the operator.

Claims

1. A high-voltage motor insulation monitoring device, comprising a base (1), characterized in that: A segmented lifting assembly (2) is installed at the top of the base (1). The segmented lifting assembly (2) includes a support plate (201) equidistantly positioned above the base (1). The support plate (201) is made of insulating material and is arranged in a semi-circular shape. A conductive plate (204) is installed on the inner arc wall of the support plate (201). An insulation monitoring assembly (4) is installed on the front of the support plate (201), and a leakage current protection assembly (5) is installed on the back of the support plate (201). The insulation monitoring assembly (4) includes a conductive rod (401) installed on the front of the tray (201). The conductive rod (401) is L-shaped. One end of the conductive rod (401) is connected to the conductive plate (204). A longitudinal cylinder (402) is provided on the front of the tray (201). The longitudinal cylinder (402) is fixedly installed on the top of the base (1). The conductive rod (401) is movably installed inside the longitudinal cylinder (402). A contact is installed on the inner bottom wall of the longitudinal cylinder (402). A grounding wire (403) is installed on the front of the longitudinal cylinder (402). One end of the grounding wire (403) is connected to the contact. The other end of the grounding wire (403) is grounded. A current transformer (405) is sleeved on the outside of the grounding wire (403). A mounting base (404) is installed at the bottom of the current transformer (405). An alarm (405) is installed on the mounting base (404). 06), the alarm (406) and the current transformer (405) are connected in series; the bottom end of the tray (201) is symmetrically provided with fixed boxes (205), the two fixed boxes (205) are fixedly installed on the base (1), the fixed box (205) is movably installed with a movable plate (206), the top of the movable plate (206) is symmetrically installed with a support rod (207), the support rod (207) extends through to the top of the fixed box (205), the support rod (207) is fixedly connected to the bottom wall of the tray (201), the bottom end of the movable plate (206) is symmetrically installed with a first spring (208), the bottom end of the first spring (208) is fixedly connected to the inner bottom wall of the fixed box (205), a connecting block (209) is installed between the two fixed boxes (205), and a fixed stabilizing component (3) is installed between the tray (201) and the connecting block (209).

2. The high-voltage motor insulation monitoring device according to claim 1, characterized in that: The pallet (201) has longitudinal plates (202) symmetrically installed at both ends. The longitudinal plates (202) are arranged longitudinally, and fixing bolts (203) are threaded on the longitudinal plates (202).

3. The high-voltage motor insulation monitoring device according to claim 2, characterized in that: The fixed stabilizing component (3) includes a slot (301) opened at the middle of the top of the connecting block (209). The slot (301) has first positioning grooves (302) on both sides. The two first positioning grooves (302) pass through to both sides of the connecting block (209). The bottom of the support plate (201) is equipped with a plug (303). The plug (303) has a second positioning groove (304) inside. The two ends of the second positioning groove (304) pass through to both sides of the plug (303). The diameter of the second positioning groove (304) is the same as the diameter of the first positioning groove (302).

4. The high-voltage motor insulation monitoring device according to claim 3, characterized in that: A support base (305) is installed at the top of the base (1), and a transverse cylinder (306) is installed at the top of the support base (305). The transverse cylinder (306) is located on one side of the end connecting block (209). A limited displacement block (307) is movably installed inside the transverse cylinder (306). A positioning rod (308) is installed on the side of the limited displacement block (307) near the connecting block (209). The diameter of the positioning rod (308) is the same as the diameter of the first positioning groove (302). The central axis of the positioning rod (308) is on the same straight line as the central axis of the first positioning groove (302). A top groove (309) is opened at the top of the transverse cylinder (306). A push plate (310) is installed at the top of the limited displacement block (307). The push plate (310) is slidably connected to the top groove (309).

5. A high-voltage motor insulation monitoring device according to claim 4, characterized in that: The front of the displacement limiting block (307) is provided with a slot (311), and the front of the transverse cylinder (306) is provided with a fixed cylinder (312). The fixed cylinder (312) is located at one end of the transverse cylinder (306) near the connecting block (209). A movable block (313) is movably installed inside the fixed cylinder (312). A locking rod (314) is installed on the side of the movable block (313) near the transverse cylinder (306). The locking rod (314) penetrates into the interior of the transverse cylinder (306). A second spring (315) is installed on the side of the movable block (313) away from the transverse cylinder (306). One end of the second spring (315) is fixedly connected to the inner wall of the end of the fixed cylinder (312) away from the transverse cylinder (306). A pull rod (316) is installed on the side of the movable block (313) away from the locking rod (314). The pull rod (316) penetrates into the outside of the fixed cylinder (312).

6. The high-voltage motor insulation monitoring device according to claim 1, characterized in that: The leakage current protection component (5) includes a back platform (501) located on the back of the tray (201). The back platform (501) is fixedly installed on the base (1). A rotating seat (502) is installed on the side of the back platform (501) near the tray (201). A connecting plate (503) is rotatably installed on the rotating seat (502). A cover plate (504) is installed on the top of the connecting plate (503). The cover plate (504) is made of insulating material and is arranged in a semi-circular shape. A back plate (505) is installed on the side of the back platform (501) away from the tray (201). A first horizontal plate (506) is installed on the side of the back plate (505) near the cover plate (504). A snap-fit ​​groove (507) is opened on the top of the first horizontal plate (506).

7. The high-voltage motor insulation monitoring device according to claim 6, characterized in that: A second horizontal plate (508) is installed on the side of the cover plate (504) near the back plate (505). The second horizontal plate (508) is located above the first horizontal plate (506). A top cylinder (509) is installed at the top of the second horizontal plate (508). A sliding block (510) is movably installed inside the top cylinder (509). A locking rod (511) is installed at the bottom of the sliding block (510). The bottom end of the locking rod (511) extends through to the bottom end of the second horizontal plate (508). The locking rod (511) engages with the locking groove (507). A second horizontal plate is installed at the bottom end of the sliding block (510). Three springs (512), the bottom end of the third spring (512) is fixedly connected to the inner bottom wall of the top cylinder (509), a magnetic block (513) is installed on the top of the sliding block (510), an electromagnet (514) is installed on the top of the top cylinder (509), a side through groove (519) is opened on the side of the top cylinder (509) away from the cover plate (504), a solenoid valve switch (520) is installed on the top of the top cylinder (509), the solenoid valve switch (520) controls the circuit opening and closing of the electromagnet (514), and the solenoid valve switch (520) is connected in series with the current transformer (405).

8. A high-voltage motor insulation monitoring device according to claim 7, characterized in that: A horizontal cylinder (515) is installed above the top cylinder (509) on the side away from the cover plate (504). A bottom through groove (517) is opened at the bottom end of the horizontal cylinder (515). A transverse sliding plate (516) is slidably installed inside the horizontal cylinder (515). A rotating rod (518) is hinged to the bottom end of the transverse sliding plate (516). The other end of the rotating rod (518) is hinged to the sliding block (510). A top plate (521) is provided on the side of the transverse sliding plate (516) away from the cover plate (504). The plate (521) is slidably installed inside the horizontal cylinder (515). The top plate (521) has symmetrically opened internal grooves (522). An internal block (523) is movably installed inside the internal groove (522). A crossbar (524) is installed on the side of the internal block (523) near the horizontal sliding plate (516). One end of the crossbar (524) is fixedly connected to the horizontal sliding plate (516). A fourth spring (525) is installed on the side of the internal block (523) away from the horizontal sliding plate (516).

9. A method for monitoring the insulation of a high-voltage motor, using the high-voltage motor insulation monitoring device according to any one of claims 1-8, characterized in that, The monitoring steps are as follows:

1. Place the high-voltage motor on multiple trays (201), and screw the two fixing bolts (203) on the trays (201) into the threaded grooves on the high-voltage motor to fix the high-voltage motor. Second, the tray (201) moves downward under the pressure of the high-voltage motor, so that the insert (303) is inserted into the slot (301) on the connecting block (209), pushing the positioning rod (308) to move, so that the positioning rod (308) is inserted into the first positioning groove (302) and the second positioning groove (304), fixing the tray (201); 3. The pallet (201) moves downward, causing the conductive rod (401) to move downward, so that the conductive rod (401) contacts the contact point on the inner bottom wall of the longitudinal cylinder (402), one end of the conductive rod (401) contacts the conductive plate (204), and the other end of the grounding wire (403) is grounded. IV. When there is leakage in the casing of the high-voltage motor, the current is introduced into the ground through the conductive plate (204), the conductive rod (401) and the grounding wire (403). A current transformer (405) is provided on the outside of the grounding wire (403). When the current flows through the grounding wire (403), the current transformer (405) generates an induced current. The current transformer (405) is connected in series with the alarm (406), so that the alarm (406) sounds an alarm. At the same time, multiple pieces are set on the support plate (201), so that the leakage location of the high-voltage motor can be detected.

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