Miniaturized magnetic mounting structure for partial discharge high-frequency sensor

Abstract

The utility model discloses a kind of local discharge high-frequency sensor miniaturization magnetic attraction installation structure, it is related to discharge sensor technical field, including shell one and the shell two fixed in its bottom, local discharge high-frequency sensor body is equipped in shell one, the inside bottom of shell two is equipped with adjusting mechanism, adjusting mechanism includes fixed ring, horizontal rotation in the inside bottom of shell one, its outside rotation sleeve is equipped with multiple rotating cylinders, rotating cylinder axial and the tangent line about circumferential corresponding position of fixed ring is mutually parallel;In the utility model, when fixed ring rotates, limiting column slides in helical limiting groove, forces rotating cylinder to rotate around its own axis, to change the orientation of magnetic plate, when the magnetic field direction of magnetic plate is perpendicular to equipment surface, magnetic flux is maximum, adsorption force is strongest, when the magnetic field direction is parallel to equipment surface, magnetic flux is minimum, adsorption force is weakest, to change adsorption intensity according to equipment shell material quality, also convenient to pull out simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of discharge sensor technology, specifically a miniaturized magnetic mounting structure for a high-frequency partial discharge sensor. Background Technology

[0002] Miniaturized partial discharge high-frequency sensors are high-precision electronic devices used to detect partial discharge phenomena inside power equipment (such as transformers, switchgear, cable terminals, etc.). Partial discharge is an early sign of insulation degradation in power equipment. By capturing the electromagnetic wave signals generated by the discharge through high-frequency sensors, insulation defects can be detected in advance, preventing equipment failures from escalating or even causing power outages.

[0003] To simplify installation, some existing miniaturized partial discharge high-frequency sensors use permanent magnets for direct adsorption. However, the strength of the fixed magnets is fixed. If the initial magnetic force is too strong, it is difficult to adjust the position or remove the sensor after adsorption. Removing the sensor is inconvenient and may even damage the sensor or device surface. If the initial magnetic force is too weak, the sensor may fall off under the vibration generated by the device during operation, resulting in monitoring interruption.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a miniaturized magnetic mounting structure for a high-frequency partial discharge sensor to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor, including a housing 1 and a housing 2 fixed to its bottom. The housing 1 houses the partial discharge high-frequency sensor body, and the bottom of the housing 2 is provided with an adjustment mechanism, which includes:

[0007] A fixed ring rotates horizontally at the bottom of an inner part of the housing. Multiple rotating cylinders are rotatably sleeved on its outer side. The axial direction of the rotating cylinders is parallel to the tangent about the circumference at the corresponding position of the fixed ring. Multiple vertically arranged limiting posts are fixed on the top of the fixed ring in a ring array about its axial direction. Multiple spiral limiting grooves are opened on the inner arc wall of the rotating cylinder in a ring array about its axial direction. The limiting posts and limiting grooves are slidably adapted to each other.

[0008] A magnetic plate is fixed on the outer arc wall of the rotating cylinder. The length direction of the magnetic plate is consistent with the radial direction of the fixed ring. The two ends of the magnetic plate along its length direction have opposite polarities. An internal toothed ring is provided in the middle of the inner arc wall of the fixed ring. A driving mechanism is connected to its inner side. Multiple rotating cylinders are arranged in a ring array about the axial direction of the fixed ring. Gear 2 is set to avoid the magnetic plate. Bearing brackets are fixed at both ends of the rotating cylinder along its axial direction. The bearing brackets are fixed on the inner side wall of the housing 2.

[0009] Furthermore, the drive mechanism located on top of gear two includes gear one that rotates horizontally on the inner wall of the top of housing two. Gear one is coaxially connected to a fixed shaft at its bottom, and gear two is coaxially fixed to the bottom of the fixed shaft. Gear two is located on an internal gear ring and the two mesh with each other. A connecting column is coaxially fixed to the bottom of gear one. Multiple extensions arranged in a circular array about its axial direction are fixed on the outer arc wall of the connecting column. The length direction of the extensions is consistent with the radial direction of the connecting column. A pawl is horizontally rotatably connected to the end of the extension on the connecting column away from the connecting column. A horizontal inner ratchet meshes with the outside of the pawl. The connecting column is coaxially rotatably connected to the center of the top of the fixed shaft, and the inner ratchet is coaxially fixed to the top of the fixed shaft.

[0010] Furthermore, a horizontal rack is meshed on one side of the gear, and the length direction of the rack is consistent with the length direction of the housing. A horizontal button is fixed to one end of the rack, and the end of the button away from the rack passes through the housing. Horizontal sliders are fixed on opposite sides of the outer arc wall of the button along the horizontal direction. A horizontal return spring is fixed on the side wall of the slider near the rack. A stop is provided on the side of the return spring away from the slider. The stop is fixed on the inner top wall of the housing, and the return spring and the stop abut against each other. A groove is horizontally opened at the center of both sides of the housing along its length direction.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By adjusting the mechanism, when the fixed ring rotates, the limiting post slides in the spiral limiting groove, forcing the rotating cylinder to rotate around its own axis, thereby changing the orientation of the magnetic plate. When the magnetic field direction of the magnetic plate is perpendicular to the surface of the equipment, the magnetic flux is the largest and the adsorption force is the strongest. When the magnetic field direction is parallel to the surface of the equipment, the magnetic flux is the smallest and the adsorption force is the weakest. Thus, the adsorption strength can be changed according to the material of the equipment shell, and it is also easy to remove.

[0013] 2. The drive mechanism facilitates adjustment. A multi-pole magnetic ring replaces a single magnet. By rotating the magnetic plate, different magnetic poles alternately approach the surface of the equipment. The interaction between the magnetic poles further refines the range of adsorption force adjustment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the connection relationship between the adjustment mechanism and the drive mechanism in a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor.

[0015] Figure 2 This is a partial structural diagram of the adjustment mechanism in a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor.

[0016] Figure 3 An exploded view of a portion of the drive mechanism in a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor;

[0017] Figure 4 This is a schematic diagram of the overall structure of a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor.

[0018] In the picture:

[0019] 10. Housing 1; 11. Housing 2; 111. Snap-in slot; 12. Button; 121. Slider;

[0020] 122. Return spring; 13. Rack and pinion; 14. Gear 1; 141. Connecting post; 15. Fixed shaft;

[0021] 16. Internal ratchet; 17. Pad;

[0022] 20. Fixed ring; 201. Limiting post; 202. Internal gear ring; 21. Rotating cylinder; 22. Magnetic plate; 23. Gear II. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see the appendix Figure 1 To be continued Figure 4 This utility model provides a miniaturized magnetic mounting structure for a partial discharge high-frequency sensor: it includes a housing 10 and a housing 2 11 fixed to its bottom. The housing 10 houses the partial discharge high-frequency sensor body, and the bottom of the housing 2 11 has an adjustment mechanism, which includes:

[0025] The fixed ring 20 rotates horizontally at the bottom of the inner part of the housing 10. Multiple rotating cylinders 21 are rotatably sleeved on its outer side. The axial direction of the rotating cylinders 21 is parallel to the tangent about the circumference at the corresponding position of the fixed ring 20. Multiple vertically arranged limiting posts 201 are fixed on the top of the fixed ring 20 in a ring array about its axial direction. Multiple spiral limiting grooves are opened on the inner arc wall of the rotating cylinder 21 in a ring array about its axial direction. The limiting posts 201 slide and adapt to the limiting grooves.

[0026] The magnetic plate 22 is fixed on the outer arc wall of the rotating cylinder 21. The length direction of the magnetic plate 22 is consistent with the radial direction of the fixed ring 20. The two ends of the magnetic plate 22 along its length direction have opposite polarities. An internal toothed ring 202 is provided in the middle of the inner arc wall of the fixed ring 20, and a driving mechanism is connected to its inner side.

[0027] Multiple rotating cylinders 21 are arranged in a ring array about the axis of the fixed ring 20. Gear 23 is set to avoid the magnetic plate 22. Bearing brackets are fixed at both ends of the rotating cylinder 21 along its axis. The bearing brackets are fixed to the inner side wall of the housing 11.

[0028] The drive mechanism located on top of gear 23 includes gear 14 that rotates horizontally on the inner wall of the top of housing 21. Gear 14 is coaxially connected to a fixed shaft 15 at its bottom. Gear 23 is coaxially fixed to the bottom of fixed shaft 15. Gear 23 is located on the inner gear ring 202 and the two mesh with each other.

[0029] It should be noted that when the fixed ring 20 rotates, the limiting post 201 on it rotates accordingly. When the limiting post 201 slides into the spiral limiting groove on the inner arc wall of the rotating cylinder 21, the movement of the limiting post 201 forces the rotating cylinder 21 to rotate along its own axis, thereby driving the magnetic plate 22 on it to rotate, changing the orientation of the magnetic plate 22 and thus changing the direction of the magnetic field, changing the strength of the adsorption. This not only allows for changing the adsorption force according to different materials of the equipment shell, but also facilitates position adjustment or removal.

[0030] The bearing bracket is used to support the rotation of the rotating cylinder 21. The bottom of the fixed ring 20 is rotatably connected to a vertical fixed plate. The fixed plate is set away from the rotating cylinder 21 and the magnetic plate 22. The fixed plate is used to support the fixed ring 20.

[0031] Please see the appendix Figure 1 To be continued Figure 4 The present invention provides a technical solution: a connecting column 141 is coaxially fixed at the bottom of the gear 14, and multiple extensions are fixed on the outer arc wall of the connecting column 141 in a ring array about its axial direction, and the length direction of the extensions is consistent with the radial direction of the connecting column 141.

[0032] The extension of the connecting post 141 is horizontally rotatably connected to a pawl 17 at one end away from the connecting post 141. A horizontal inner ratchet 16 engages on the outside of the pawl 17. The connecting post 141 is coaxially rotatably connected to the top center of the fixed shaft 15. The inner ratchet 16 is coaxially fixed to the top of the fixed shaft 15.

[0033] One side of the gear 14 is meshed with a horizontal rack 13. The length direction of the rack 13 is consistent with the length direction of the housing 11. A horizontal button 12 is fixed to one end of the rack 13. The end of the button 12 away from the rack 13 passes through the housing 11.

[0034] On the outer arc wall of the button 12, there are horizontal sliders 121 fixed on opposite sides in the horizontal direction. A horizontal return spring 122 is fixed on the side wall of the slider 121 near the rack 13. A stop is provided on the side of the return spring 122 away from the slider 121. The stop is fixed on the inner wall of the top of the housing 11. The return spring 122 and the stop abut against each other.

[0035] The housing 11 has horizontally grooved slots 111 at the center of both sides of its length direction.

[0036] It should be noted that the inner ratchet 16 and the pawl 17 work together to allow gear 14 to mesh in only one direction when it rotates. When button 12 is pressed, it drives rack 13 to mesh gear 14 and thus drive the adjustment mechanism. When button 12 is released, the return spring 122 assists button 12 to reset. At this time, rack 13 drives gear 14 to mesh in the opposite direction. The inner ratchet 16 and the pawl 17 work together to prevent the adjustment mechanism from being driven in the opposite direction.

[0037] That is, by pressing and releasing button 12 once, the adjustment mechanism can be driven to rotate the magnetic plate 22 by a certain angle, and the slot 111 can be used to manually remove the equipment.

[0038] Working principle:

[0039] Pressing button 12 pushes rack 13 to move horizontally, causing gear 14 to rotate. Gear 14 drives gear 23 through fixed shaft 15. Gear 23 meshes with the inner gear ring 202 of fixed ring 20, causing fixed ring 20 to rotate horizontally. Limiting post 201 on fixed ring 20 slides in the spiral limiting groove of rotating cylinder 21, forcing rotating cylinder 21 to move axially and drive magnetic plate 22 to rotate, changing the direction of magnetic field and adsorption strength to adapt to different material shells.

[0040] When button 12 is released, the reset spring 122 pushes button 12 to reset, and the rack rod 13 drives gear 14 to rotate in the opposite direction. However, the inner ratchet 16 and pawl 17 cooperate to prevent the reverse drive of the adjustment mechanism, thus realizing unidirectional adjustment. The slot 111 facilitates manual disassembly of the sensor.

Claims

1. A partial discharge high frequency sensor miniaturized magnetic attraction mounting structure comprising a housing one (10) and a housing two (11) fixed to the bottom of the housing one (10), a partial discharge high frequency sensor body is arranged in the housing one (10), characterized in that: The bottom of the inner part of the second housing (11) is provided with an adjustment mechanism, which includes: The fixed ring (20) rotates horizontally at the bottom of the inner part of the housing (10). Multiple rotating cylinders (21) are rotatably sleeved on its outer side. The axial direction of the rotating cylinders (21) is parallel to the tangents about the circumference at the corresponding positions of the fixed ring (20). Multiple vertically arranged limiting posts (201) are fixed on the top of the fixed ring (20) in a ring array about its axial direction. Multiple spiral limiting grooves are opened on the inner arc wall of the rotating cylinder (21) in a ring array about its axial direction. The limiting posts (201) slide and adapt to the limiting grooves. A magnetic plate (22) is fixed on the outer arc wall of the rotating cylinder (21). The length direction of the magnetic plate (22) is consistent with the radial direction of the fixed ring (20). The two ends of the magnetic plate (22) along its length direction have opposite polarities. An internal toothed ring (202) is provided in the middle of the inner arc wall of the fixed ring (20), and a driving mechanism is connected to its inner side.

2. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 1, wherein: Multiple rotating cylinders (21) are arranged in a ring array about the axis of the fixed ring (20). Gear 2 (23) is set away from the magnetic plate (22). Both ends of the rotating cylinder (21) along its axis are fixed with bearing brackets, which are fixed to the inner sidewall of housing 2 (11).

3. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 1, wherein: The drive mechanism located on the top of gear two (23) includes gear one (14) which rotates horizontally on the inner wall of the top of housing two (11). The bottom of gear one (14) is coaxially connected to a fixed shaft (15). The bottom of the fixed shaft (15) is coaxially fixed to gear two (23). Gear two (23) is located on the inner gear ring (202) and the two mesh with each other.

4. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 3, wherein: The bottom of the gear (14) is coaxially fixed with a connecting column (141). Multiple extensions are fixed on the outer arc wall of the connecting column (141) in a ring array about its axial direction. The length direction of the extensions is consistent with the radial direction of the connecting column (141).

5. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 4, wherein: The extension of the connecting post (141) is horizontally rotatably connected to a pawl (17) at one end away from the connecting post (141). A horizontal inner ratchet (16) engages on the outside of the pawl (17). The connecting post (141) is coaxially rotatably connected to the top center of the fixed shaft (15). The inner ratchet (16) is coaxially fixed to the top of the fixed shaft (15).

6. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 3, wherein: One side of the gear (14) is meshed with a horizontal rack (13). The length direction of the rack (13) is consistent with the length direction of the housing (11). A horizontal button (12) is fixed at one end of the rack (13). The end of the button (12) away from the rack (13) passes through the housing (11).

7. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 6, wherein: On the outer arc wall of the button (12), there are horizontal sliders (121) fixed on opposite sides in the horizontal direction. A horizontal return spring (122) is fixed on the side wall of the slider (121) near the rack (13). A stop is provided on the side of the return spring (122) away from the slider (121). The stop is fixed on the inner wall of the top of the housing (11). The return spring (122) and the stop abut against each other.

8. The partial discharge high frequency sensor miniaturized magnetic attraction mounting structure of claim 1, wherein: The housing 2 (11) has horizontally grooved slots (111) at the center of both sides of its length direction.

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