A high voltage motor insulation monitoring device

Abstract

The present invention belongs to the field of motor insulation monitoring, and provides a high-voltage motor insulation monitoring device, including a base, on which symmetrically distributed mounting plates are fixedly mounted, a lifting plate is arranged on the mounting plate, a side plate is fixedly mounted on the surface of the lifting plate away from the base, the side plates are arranged in multiple groups and exist in pairs, a scraper is fixedly mounted on the top of the side plate, a second conductive plate is arranged on the side plate, and the second conductive plate is connected to the high-voltage motor to solve the technical problem in the prior art that the detection structure and the high-voltage motor casing are not tightly connected, resulting in poor insulation monitoring results. When the present invention is used, the scraper contacts the side of the rib when the lifting plate moves upward, and the paint on the side of the rib is scraped off by the scraper, and subsequently the second conductive plate contacts the area on the side of the rib from which the paint is scraped off. The present invention can be widely used in connection scenarios of insulation monitoring.

Description

Technical Field

[0001] The invention belongs to the field of motor insulation monitoring, and in particular relates to a high-voltage motor insulation monitoring device. Background Art

[0002] A high-voltage motor refers to an electric motor with a rated voltage of more than 1000V. High-voltage motors are produced because the motor power is proportional to the product of voltage and current. Therefore, when the power of a low-voltage motor increases to a certain level, the current is limited by the allowable bearing capacity of the wire and it is difficult to increase it, or the cost is too high.

[0003] The influence of the external environment and the wear of the motor itself will reduce the insulation capacity of the high-voltage motor, causing the casing of the high-voltage motor to be charged when it is working. People cannot discover in time when the casing is charged, and people accidentally touch the motor to cause electric shock, which causes serious harm to people's health. In response to the above technical problems, the applicant has retrieved some prior art, such as the Chinese patent with patent announcement number CN214845461U. When in use, the high-voltage motor is installed and the casing of the high-voltage motor is in contact with the conductive plate. However, in order to extend the service life of the motor and prevent the motor casing from being eroded by environmental factors such as oxidation and corrosion, a layer of paint is generally applied to the casing of the high-voltage motor. Therefore, the paint is sandwiched between the casing of the high-voltage motor and the conductive plate, resulting in the high-voltage motor casing and the conductive plate cannot be in close contact, which may cause poor contact of the conductive plate and result in poor insulation monitoring results. Summary of the invention

[0004] The purpose of the present invention is to provide a high-voltage motor insulation monitoring device, aiming to solve the technical problem in the prior art that the detection structure and the high-voltage motor housing are not tightly connected, resulting in poor insulation monitoring results.

[0005] The present invention is implemented as follows: a high-voltage motor insulation monitoring device comprises a base, a symmetrically distributed mounting plate is fixedly mounted on the base, a lifting plate is arranged on the mounting plate, a side plate is fixedly mounted on the surface of the lifting plate away from the base, the side plates are arranged in multiple groups and exist in pairs, a scraper is fixedly mounted on the top of the side plate, a second conductive plate is arranged on the side plate, and the second conductive plate is connected to the high-voltage motor;

[0006] A first conductive plate is fixedly mounted on a surface of the lifting plate away from the base, the first conductive plate is fixedly connected to a second conductive plate via wires, and a detection component connected to the first conductive plate is disposed on the base, and the detection component is grounded.

[0007] Further technical solution: A bracket is fixedly installed on the mounting plate, and a first adjusting screw is threadedly installed on the bracket to drive the lifting plate to move up and down.

[0008] Further technical solution: the scraper is set at an angle with the horizontal plane and the end of the scraper connected to the side plate is the lower end, the scrapers on the two corresponding groups of side plates are symmetrically distributed and extend toward the inner side of the two corresponding groups of side plates.

[0009] Further technical solution: a second adjusting screw is threadedly installed on the side plate, the second adjusting screw drives the movable plate to move, a movable box is fixedly installed on the movable plate, and the second conductive plate is fixedly installed on the surface of the movable box away from the side plate.

[0010] Further technical solution: A friction plate is fixedly installed on the side plate, the friction plate is located at one end of the side plate away from the lifting plate, the surface of the friction plate away from the side plate is a friction surface, and its friction surface is flush with the scraping surface of the scraper.

[0011] Further technical solution: A guide plate with an inverted V-shaped structure is fixedly installed on the side of the friction plate close to the lifting plate, and the surface of the guide plate away from the side plate is flush with the friction surface of the friction plate.

[0012] Further technical solution: The detection component includes a first wire and a current transformer, one end of the first wire is fixedly connected to the first conductive plate and the other end is grounded, the current transformer is fixedly mounted on the base and the first wire passes through the current transformer, the current transformer is connected to a second wire, and the second wire is connected in turn to an ammeter and an audible and visual alarm.

[0013] Further technical solution: a partition is slidably installed in the mobile box, and a plurality of groups of spaced-apart blowing pipes are fixedly installed on the partition, the blowing pipes pass through the second conductive plate and are slidably connected to the second conductive plate, a support tube is fixedly installed on the end of the blowing pipe away from the partition, the support tube and the blowing pipe are coaxially arranged with a gap therebetween, a blowing ring is rotatably installed on the blowing pipe and the support tube, the blowing ring covers the gap between the support tube and the blowing pipe, and a plurality of groups of spaced-apart blowing holes are provided on the surface of the blowing ring away from the side plate.

[0014] Further technical solution: a coaxially arranged support shaft is fixedly installed in the support tube, one end of the support shaft away from the support tube is fixedly connected to the blowing pipe, a coaxially arranged rotating shaft is rotatably installed on the support shaft, a fan blade is fixedly installed on the rotating shaft, and the rotating shaft is fixedly connected to the blowing ring through a connecting plate.

[0015] Further technical solution: A plurality of grooves are provided on the surface of the second conductive plate away from the side plate, the grooves correspond to the blowing pipe and are coaxially arranged, conductive rings distributed around the blowing pipe are arranged in the grooves, the conductive rings are in sliding contact with the second conductive plate, an elastic part is fixedly installed in the grooves, the elastic part is fixedly connected to the conductive ring, and in the initial state, the conductive ring protrudes out of the second conductive plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the lifting plate moves upward, the scraper contacts the side of the rib, and the paint on the side of the rib is scraped off by the scraper. Subsequently, the second conductive plate contacts the area on the side of the rib where the paint is scraped off, so that the second conductive plate can better contact the rib, improve the close contact between the second conductive plate and the motor housing, ensure the second conductive plate to conduct current, and improve the sensitivity and accuracy of insulation monitoring.

[0018] 2. After the scraper scrapes off the paint on the side of the rib, the friction plate is used to grind the area to further reduce the paint remaining on the rib after the scraper scrapes off. The debris produced by grinding can move to both sides along the guide plate to avoid the debris falling directly, reducing the probability of the debris contacting the second conductive plate, ensuring the cleanliness of the second conductive plate, further improving the conductive effect between the second conductive plate and the high-voltage motor casing, and improving the sensitivity and accuracy of insulation monitoring.

[0019] 3. When the moving box drives the second conductive plate close to the ribs, the air in the moving box is blown out through the blowing pipe, and then the air enters the blowing ring and blows to the surface of the ribs through the blowing holes. When the air flows in the blowing pipe, the fan blades drive the rotating shaft to rotate, and the rotating shaft drives the blowing ring to rotate through the connecting plate, so that the air can comprehensively clean the periphery of the contact position between the support tube and the ribs, further reducing the paint residue on the surface of the ribs, improving the cleanliness of the rib surface, further improving the close contact between the second conductive plate and the ribs, and improving the sensitivity and accuracy of insulation monitoring.

[0020] 4. When the mobile box moves, the conductive ring contacts the rib surface first, and the conductive ring compresses the elastic part until the second conductive plate contacts the rib surface completely. Since the contact position between the conductive ring and the rib is close to the blowing position of the blowing hole, the rib surface at this position is clean at a higher level, and the conductive ring contacts the rib under the pressure of the elastic part without being affected by the second conductive plate, thus avoiding the influence of residual impurities at other positions of the rib on the contact between the conductive ring and the rib, further improving the close connection between the second conductive plate and the rib, improving the conductive effect, and improving the sensitivity and accuracy of insulation monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the base in the present invention.

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the A1 region in the middle.

[0024] Figure 4 It is a schematic structural diagram of the side panel in the present invention.

[0025] Figure 5 It is a schematic cross-sectional structural diagram of the mobile box in the present invention.

[0026] Figure 6 for Figure 5 A magnified schematic diagram of the A2 region in the middle.

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the blowing pipe in the present invention.

[0028] Figure 8 It is the front view of the scraper in the present invention.

[0029] Fig. 9 It is a schematic diagram of the guide plate structure in the present invention.

[0030] In the accompanying drawings: 1. base; 2. mounting plate; 3. bracket; 4. first adjusting screw; 5. lifting plate; 6. first conductive plate; 7. first wire; 8. current transformer; 9. second wire; 10. ammeter; 11. sound and light alarm; 12. side plate; 13. scraper; 14. friction plate; 15. guide plate; 16. second adjusting screw; 17. moving plate; 18. moving box; 19. second conductive plate; 20. partition; 21. blowing pipe; 22. groove; 23. conductive ring; 24. elastic member; 25. support tube; 26. support shaft; 27. rotating shaft; 28. fan blade; 29. ​​connecting plate; 30. blowing ring; 31. blowing hole; 32. detection component. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1-Figure 9As shown, a high-voltage motor insulation monitoring device provided by the present invention comprises a base 1, on which a symmetrically distributed mounting plate 2 is fixedly mounted, on which a lifting plate 5 is arranged, on which a bracket 3 is fixedly mounted, on which a first adjusting screw 4 driving the lifting plate 5 to move up and down is threadedly mounted, and on which a surface of the lifting plate 5 away from the base 1 is fixedly mounted a side plate 12, the side plates 12 are arranged in multiple groups and exist in pairs, and on the top of the side plates 12 is fixedly mounted a scraper 13, which is arranged at an angle with the horizontal plane and scrapes The end of the plate 13 connected to the side plate 12 is the lower end, the scrapers 13 on the corresponding two groups of side plates 12 are symmetrically distributed and extend toward the inner side of the two groups of corresponding side plates 12, a second conductive plate 19 is provided on the side plate 12, the second conductive plate 19 is connected to the high-voltage motor, a second adjusting screw 16 is threadedly installed on the side plate 12, the second adjusting screw 16 drives the moving plate 17 to move, a moving box 18 is fixedly installed on the moving plate 17, and the second conductive plate 19 is fixedly installed on the surface of the moving box 18 away from the side plate 12;

[0034] A first conductive plate 6 is fixedly mounted on the surface of the lifting plate 5 away from the base 1. The first conductive plate 6 is fixedly connected to the second conductive plate 19 via wires. A detection component 32 connected to the first conductive plate 6 is provided on the base 1, and the detection component 32 is grounded.

[0035] In actual application, the present embodiment is installed on the mounting plate 2. After the fixing is completed, the lifting plate 5 is driven to move upward by the first adjusting screw 4. When the lifting plate 5 moves upward, the upper end of the scraper 13 first contacts the ribs on the housing of the high-voltage motor. The distance between the ends of the two groups of corresponding scrapers 13 is a set value, which corresponds to the width of the ribs directly below the housing of the corresponding model of high-voltage motor. Different models of high-voltage motors are tested by scrapers 13 at different distances. The end of the scraper 13 contacts the side of the rib. As the lifting plate 5 moves upward, the paint on the side of the rib is scraped off by the scraper 13. When the scraper 13 moves to the top of the rib, the lifting plate 5 stops moving. At this time, the second conductive plate 19 moves to the height of the paint-scraped area on the rib, and the second adjusting screw 16 is rotated to drive the moving plate 17 and the moving box 18 to approach the rib until the second conductive plate 19 contacts the paint-scraped area on the side of the rib. At this time, the installation is completed. The paint on the side of the rib is scraped by the scraper 13, and the second conductive plate 19 can be better contacted with the rib, thereby improving the close contact between the second conductive plate 19 and the motor housing, ensuring the current conduction of the second conductive plate 19, and improving the sensitivity and accuracy of insulation monitoring;

[0036] When the insulation of the high-voltage motor is damaged, the casing of the high-voltage motor will be charged, and the current will be transmitted to the first conductive plate 6 through the second conductive plate 19 and the wire. The current will then flow through the detection component 32 and eventually flow to the ground. When the current flows through the detection component 32, the detection component 32 can detect the magnitude of the current and generate a leakage alarm to alert the staff.

[0037] like Figure 1-Figure 6 As shown, a high-voltage motor insulation monitoring device provided by the present invention is provided, wherein a friction plate 14 is fixedly mounted on the side plate 12, and the friction plate 14 is located at one end of the side plate 12 away from the lifting plate 5, and the surface of the friction plate 14 away from the side plate 12 is a friction surface, and the friction surface is flush with the scraping surface of the scraper 13.

[0038] Specifically, a guide plate 15 with an inverted V-shaped structure is fixedly installed on the side of the friction plate 14 close to the lifting plate 5 , and the surface of the guide plate 15 away from the side plate 12 is flush with the friction surface of the friction plate 14 .

[0039] In actual application of this embodiment, when the friction plate 14 moves upward, the position on the reinforcing rib where the paint is scraped off by the scraper 13 is polished, so as to reduce the paint remaining after the scraper 13 scrapes off, so that the second conductive plate 19 can be in stable and close contact with the rib, thereby improving the conductive effect between the high-voltage motor housing and the second conductive plate 19;

[0040] Since there are a large number of raised structures on the friction surface of the friction plate 14 and there are gaps between the raised structures, when the friction plate 14 moves upward, some of the residual paint will be pushed upward, and the paint moving upward will not affect the contact between the second conductive plate 19 below and the ribs. Some extremely small paint powder particles generated by the friction of the friction plate 14 will fall downward onto the guide plate 15 through the gaps between the raised structures. Since the guide plate 15 is an inverted V-shaped structure, the debris can move to both sides along the guide plate 15, avoiding the debris from falling directly, reducing the probability of the debris contacting the second conductive plate 19, ensuring the cleanliness of the second conductive plate 19, further improving the conductive effect between the second conductive plate 19 and the high-voltage motor casing, and improving the sensitivity and accuracy of insulation monitoring.

[0041] like Figure 1-Figure 3 As shown, a high-voltage motor insulation monitoring device provided by the present invention is provided, and the detection component 32 includes a first wire 7 and a current transformer 8. One end of the first wire 7 is fixedly connected to the first conductive plate 6 and the other end is grounded. The current transformer 8 is fixedly mounted on the base 1 and the first wire 7 passes through the current transformer 8. The current transformer 8 is connected to a second wire 9, and the second wire 9 is connected to an ammeter 10 and an audible and visual alarm 11 in sequence.

[0042] In actual application of this embodiment, when the high-voltage motor has leakage, the current on its casing flows to the ground through the first wire 7. When current flows on the first wire 7, the current transformer 8 will generate mutual inductance current. At this time, the sound and light alarm 11 can sound an alarm to prompt that the high-voltage motor has leakage problem. The magnitude of the mutual inductance current is detected by the ammeter 10 to obtain the magnitude of the leakage current.

[0043] like Figure 1-Figure 7 As shown, a high-voltage motor insulation monitoring device provided by the present invention is provided, a partition 20 is slidably installed in the movable box 18, a plurality of groups of blowing pipes 21 with intervals are fixedly installed on the partition 20, the blowing pipes 21 pass through the second conductive plate 19 and are slidably connected to the second conductive plate 19, a support tube 25 is fixedly installed on the end of the blowing pipe 21 away from the partition 20, the support tube 25 and the blowing pipe 21 are coaxially arranged with a gap therebetween, a blowing ring 30 is rotatably installed on the blowing pipe 21 and the support tube 25, the blowing ring 30 covers the gap between the support tube 25 and the blowing pipe 21, and a plurality of groups of blowing holes 31 with intervals are provided on the surface of the blowing ring 30 away from the side plate 12.

[0044] Specifically, a coaxially arranged support shaft 26 is fixedly installed in the support tube 25, and one end of the support shaft 26 away from the support tube 25 is fixedly connected to the blowing pipe 21. A coaxially arranged rotating shaft 27 is rotatably installed on the support shaft 26, and a fan blade 28 is fixedly installed on the rotating shaft 27. The rotating shaft 27 is fixedly connected to the blowing ring 30 through a connecting plate 29.

[0045] Specifically, a plurality of grooves 22 are provided on the surface of the second conductive plate 19 away from the side plate 12. The grooves 22 correspond to the blowing pipe 21 and are coaxially arranged. Conductive rings 23 distributed around the blowing pipe 21 are arranged in the grooves 22. The conductive rings 23 are in sliding contact with the second conductive plate 19. An elastic member 24 is fixedly installed in the grooves 22. The elastic member 24 is fixedly connected to the conductive ring 23. In the initial state, the conductive ring 23 protrudes from the second conductive plate 19.

[0046] In actual application of this embodiment, when the moving box 18 approaches the ribs of the high-voltage motor housing, the support tube 25 first contacts the surface of the ribs, and then the support tube 25 pushes the partition 20 to move in the moving box 18 through the blowing pipe 21. When the partition 20 moves, the air in the moving box 18 located in front of the moving direction of the partition 20 is squeezed out, and the air is blown out through the blowing pipe 21. Then the air enters the blowing ring 30 and blows toward the surface of the ribs through the blowing holes 31. When the air flows in the blowing pipe 21, the fan blades 28 drive the rotating shaft 27 to rotate, and the rotating shaft 27 drives the blowing ring 30 to rotate through the connecting plate 29, so that the air can comprehensively clean the periphery of the contact position between the support tube 25 and the ribs, further reduce the paint residue on the surface of the ribs, improve the cleanliness of the rib surface, further improve the close contact between the second conductive plate 19 and the ribs, and improve the sensitivity and accuracy of insulation monitoring;

[0047] The movable box 18 continues to move. At this time, the conductive ring 23 contacts the surface of the rib, and the conductive ring 23 compresses the elastic part 24 until the second conductive plate 19 is completely in contact with the surface of the rib. Since the position where the conductive ring 23 contacts the rib is close to the blowing position of the blowing hole 31, the rib surface at this position is clean at a higher level, and the conductive ring 23 contacts the rib under the pressure of the elastic part 24 without being affected by the second conductive plate 19, thereby avoiding the influence of residual impurities at other positions of the rib on the contact between the conductive ring 23 and the rib, further improving the close connection between the second conductive plate 19 and the rib, improving the conductive effect, and improving the sensitivity and accuracy of insulation monitoring.

[0048] In an embodiment of the present invention, the elastic member 24 is a spring, and may also be other elastic members such as an elastic ball. The spring applies pressure to the conductive ring 23, thereby achieving contact between the conductive ring 23 and the ribs.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-voltage motor insulation monitoring device, comprising a base (1), on which symmetrically distributed mounting plates (2) are fixedly mounted, characterized in that: The mounting plate (2) is provided with a lifting plate (5), a side plate (12) is fixedly mounted on a surface of the lifting plate (5) away from the base (1), the side plates (12) are provided in multiple groups and exist in pairs, a scraper plate (13) is fixedly mounted on the top of the side plate (12), a second conductive plate (19) is provided on the side plate (12), and the second conductive plate (19) is connected to the high-voltage motor; A first conductive plate (6) is fixedly mounted on a surface of the lifting plate (5) away from the base (1); the first conductive plate (6) is fixedly connected to a second conductive plate (19) via an electric wire; a detection component (32) connected to the first conductive plate (6) is disposed on the base (1); the detection component (32) is grounded; A second adjusting screw (16) is threadedly mounted on the side plate (12), the second adjusting screw (16) drives the moving plate (17) to move, a moving box (18) is fixedly mounted on the moving plate (17), and a second conductive plate (19) is fixedly mounted on a surface of the moving box (18) away from the side plate (12); A partition (20) is slidably mounted in the movable box (18), a plurality of groups of blowing pipes (21) are fixedly mounted on the partition (20) and are spaced apart from each other. The blowing pipes (21) penetrate the second conductive plate (19) and are slidably connected to the second conductive plate (19). A support tube (25) is fixedly mounted on one end of the blowing pipe (21) away from the partition (20). The support tube (25) and the blowing pipe (21) are coaxially arranged with a space therebetween. A blowing ring (30) is rotatably mounted on the blowing pipe (21) and the support tube (25). The blowing ring (30) covers the space between the support tube (25) and the blowing pipe (21). A plurality of groups of blowing holes (31) are spaced apart from each other on a surface of the blowing ring (30) away from the side plate (12). A coaxially arranged support shaft (26) is fixedly mounted in the support tube (25); one end of the support shaft (26) away from the support tube (25) is fixedly connected to the blowing pipe (21); a coaxially arranged rotating shaft (27) is rotatably mounted on the support shaft (26); a fan blade (28) is fixedly mounted on the rotating shaft (27); and the rotating shaft (27) is fixedly connected to the blowing ring (30) via a connecting plate (29); A plurality of groups of grooves (22) are provided on a surface of the second conductive plate (19) away from the side plate (12); the grooves (22) correspond to the blowing pipe (21) and are coaxially arranged; conductive rings (23) are arranged in the grooves (22) and are distributed around the blowing pipe (21); the conductive rings (23) are in sliding contact with the second conductive plate (19); an elastic member (24) is fixedly installed in the grooves (22); the elastic member (24) is fixedly connected to the conductive ring (23); and in an initial state, the conductive ring (23) protrudes out of the second conductive plate (19).

2. A high voltage motor insulation monitoring device according to claim 1, characterized in that: A bracket (3) is fixedly mounted on the mounting plate (2), and a first adjusting screw (4) is threadedly mounted on the bracket (3) for driving the lifting plate (5) to move up and down.

3. A high voltage motor insulation monitoring device according to claim 1, characterized in that: The scraper (13) is arranged at an angle with the horizontal plane, and the end of the scraper (13) connected to the side plate (12) is the lower end. The scrapers (13) on the two corresponding groups of side plates (12) are symmetrically distributed, and the scrapers (13) extend toward the inner sides of the two corresponding groups of side plates (12).

4. A high voltage motor insulation monitoring device according to claim 1, characterized in that: A friction plate (14) is fixedly mounted on the side plate (12). The friction plate (14) is located at one end of the side plate (12) away from the lifting plate (5). The surface of the friction plate (14) away from the side plate (12) is a friction surface, and the friction surface is flush with the scraping surface of the scraper (13).

5. A high voltage motor insulation monitoring device according to claim 4, characterized in that: A guide plate (15) with an inverted V-shaped structure is fixedly mounted on the side of the friction plate (14) close to the lifting plate (5), and the surface of the guide plate (15) away from the side plate (12) is flush with the friction surface of the friction plate (14).

6. A high voltage motor insulation monitoring device according to claim 1, characterized in that: The detection assembly (32) comprises a first wire (7) and a current transformer (8), one end of the first wire (7) being fixedly connected to the first conductive plate (6) and the other end being grounded, the current transformer (8) being fixedly mounted on the base (1) and the first wire (7) passing through the current transformer (8), the current transformer (8) being connected to a second wire (9), and the second wire (9) being connected in sequence to an ammeter (10) and an audible and visual alarm (11).

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