Tooling equipment for detecting radial height of contact of oil chamber of on-load tap changer

Abstract

The utility model relates to a kind of detection on-load tap-changer oil chamber contact radial height's tool equipment, including the fixed structure supported on oil chamber flange, side arm rotationally connected in fixed structure, and the driving structure of side arm rotation, fixed structure includes the cam being coaxially arranged with oil chamber and side arm, side arm is fixed with the side plate extending along radial, side plate is equipped with measuring device, along radial movement and extrude the slide bar of measuring device contact rod, and the elastic device of slide bar and oil bucket inner wall contact is driven.Between the utility model in use, through fixed structure, side arm is fixed on oil chamber, driving structure side arm is rotated along circumference, when slide bar hits oil chamber contact, the protruding oil chamber contact drives slide bar to slide in, compresses elastic device, slide bar compresses the contact rod of measuring device, then reads the value of measuring device, in turn, the several oil chamber contacts located on the same circumference are measured, to obtain measurement data directly, ensure measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of oil chambers, and more particularly to the field of tooling equipment technology, specifically referring to a tooling device for detecting the radial height of the contacts in the oil chamber of an on-load tap changer. Background Technology

[0002] On-load tap changers are crucial components of transformers, responsible for maintaining voltage stability in the power grid system. Insulation breakdown in an on-load tap changer can directly lead to transformer malfunctions, consequently affecting the normal operation of the power system. Therefore, insulation performance is a key design parameter for on-load tap changers.

[0003] Among them, the height of the oil chamber contact is a critical dimension of the on-load tap changer. Its dimensional deviation directly affects the electrical and mechanical performance of the switch, and thus its insulation performance.

[0004] Currently, the measurement of the radial height of oil chamber contacts is mostly done visually or using simple tooling, resulting in poor accuracy. Furthermore, the measured data requires further processing and calculation. Therefore, there is an urgent need for a high-precision tooling for measuring the radial height of oil chamber contacts. This is of great significance for controlling the production quality of on-load tap changers and improving their performance. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a tooling device for detecting the radial height of the oil chamber contacts of an on-load tap changer, thereby improving detection accuracy.

[0006] This utility model is achieved through the following technical solution: a tooling device for detecting the radial height of the oil chamber contact of an on-load tap changer, comprising a fixed structure supported on the oil chamber flange, a side arm rotatably connected to the fixed structure, and a drive structure for rotating the side arm. The fixed structure includes a cam coaxially arranged with the oil chamber and the side arm. A side plate extending radially is fixedly connected to the side arm. The side plate is provided with a measuring device, a slide rod that moves radially and presses the contact rod of the measuring device, and an elastic device that drives the slide rod to contact the inner wall of the oil drum.

[0007] In use, this invention uses a fixing structure to fix the side arm to the oil chamber. The cam and oil chamber are coaxially aligned. When the slide rod moves to a height coplanar with several oil chamber contacts, the end of the slide rod away from the measuring device contacts the inner wall of the oil chamber under the action of the elastic device. Because the side arm and oil chamber are coaxial, the readings of the measuring device are the same when the slide rod contacts the inner wall during rotation. The drive structure rotates the side arm circumferentially. When the slide rod touches an oil chamber contact, the protruding contact causes the slide rod to slide inward, compressing the elastic device. The slide rod compresses the contact rod of the measuring device, and the measurement value is then read. This process is repeated to measure several oil chamber contacts located on the same circumference, thereby directly obtaining measurement data and ensuring measurement accuracy.

[0008] Preferably, the fixing structure includes a fixed disk, a cam that is axially connected to the fixed disk via a first rotating shaft, a push rod that is arranged circumferentially along the cam and slidably connected to the fixed disk radially along the cam, and a fixing spring that drives the push rod to slide inward on the fixed disk. The protrusions on the cam are correspondingly arranged with the push rod, and the inner side of the push rod is in contact with the corresponding protrusion.

[0009] In this preferred embodiment, the rotation of the cam causes the protrusion to drive the push rod to slide synchronously and at the same distance in all directions, while simultaneously stretching the fixing spring. When the cam rotates to a certain angle, the protrusion drives one end of the push rod to push against the inner circumferential surface of the flange. Under the action of several push rods, it is fixed on the oil chamber flange. Since the push rod moves synchronously and at the same distance in the radial direction, the coaxial setting of the camshaft and the oil chamber is ensured.

[0010] Preferably, the fixing structure further includes an outer disk located outside the oil chamber, a worm gear reducer mounted on the outer disk, a first handle wheel mounted on the worm, and the first rotating shaft rotatably connected to the outer disk and fixedly connected to the worm gear shaft.

[0011] This preferred solution, through the use of a worm gear reducer, facilitates the rotation and positioning of the cam.

[0012] Preferably, the fixed plate is provided with a fixed block corresponding to the push rod, through which the push rod passes, and the fixed block is provided with the fixed spring, the other end of which is connected to the push rod.

[0013] In this preferred embodiment, by setting a fixed spring, when the cam rotates in the reverse direction, it drives the push rod to reset.

[0014] Preferably, both ends of the push rod are axially connected to fixed wheels, and the slide rod is axially connected to rollers that are in contact with the inner wall of the oil chamber.

[0015] This preferred solution transforms sliding friction into rolling friction through the arrangement of cams and rollers, thereby protecting the push rod, slide rod, cam, inner wall of the oil chamber, and oil chamber contacts.

[0016] Preferably, a sliding sleeve is fixedly connected to the sliding rod, a stop block is provided on the side plate for the measuring device contact rod to pass through, the elastic device includes a second spring sleeved on the sliding rod and located between the stop block and the sliding sleeve, and a guide hole is also provided on the side plate to guide the sliding sleeve to move radially.

[0017] This preferred solution, by setting a second spring, facilitates the movement of the slide rod to the inner circumferential surface of the oil chamber contact.

[0018] Preferably, the drive structure includes a geared disc fixed to the side arm, a gear meshing with the geared disc, and a rotating shaft fixed to the gear and rotatably connected to the fixed structure, with a second handle wheel located outside the oil chamber fixedly connected to the rotating shaft.

[0019] In this preferred embodiment, the gear disc and gears form a spur gear reducer. The setting of the rotating shaft facilitates the rotation of the second handle wheel outside the oil chamber, thereby driving the side arm and side plate to rotate.

[0020] Preferably, the measuring device includes a dial indicator. This preferred embodiment improves measurement accuracy by using a dial indicator.

[0021] Preferably, the first rotating shaft is provided with a bearing, and the outer circle of the bearing is connected to the side arm.

[0022] This preferred embodiment achieves a rotatable connection between the first rotating shaft and the side arm by using bearings.

[0023] Preferably, the side arm includes a side tube and a side rod slidably connected inside the side tube. The side plate is fixed to the side rod. The side tube is rotatably connected to the fixed structure. The side tube has a plurality of first through holes arranged along the height direction and extending radially. The side rod has a plurality of second through holes arranged along the height direction and extending radially. The first through holes and the second through holes are connected by bolts and nuts.

[0024] In use, this preferred solution allows for adjustment of the side plate height by selecting the second and first perforations, thereby facilitating the matching of the side plate height with the oil chamber contact height.

[0025] The beneficial effects of this utility model are as follows: The side arm is fixed to the oil chamber via a fixed structure. The cam and oil chamber are coaxially aligned. When the slide rod moves to a height coplanar with several oil chamber contacts, the end of the slide rod away from the measuring device contacts the inner wall of the oil chamber under the action of the elastic device. Because the side arm and oil chamber are coaxial, the readings of the measuring device are the same when the slide rod contacts the inner wall during rotation. The drive structure drives the side arm to rotate circumferentially. When the slide rod touches an oil chamber contact, the protruding oil chamber contact causes the slide rod to slide inward, compressing the elastic device. The slide rod compresses the contact rod of the measuring device, and then the value of the measuring device is read. This process is repeated to measure several oil chamber contacts located on the same circumference, thereby directly obtaining measurement data and ensuring measurement accuracy. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0027] Figure 2 This is a top view of the fixed plate.

[0028] Figure 3 This is a top view of the side panel.

[0029] Figure 4 A top view of the area where the second spring has been removed from the side panel;

[0030] Figure 5 This is a schematic diagram of the usage state of this utility model;

[0031] Figure 6 This is a schematic diagram of oil chamber contact measurement.

[0032] As shown in the figure:

[0033] 1. First handle wheel; 2. Second handle wheel; 3. Worm gear reducer; 4. Outer disc; 5. Fixed structure; 6. Gear disc; 7. Gear; 8. Side arm; 9. Side plate; 10. Flange of oil chamber; 50. Fixed disc; 51. Cam; 52. Fixed block; 53. Push rod; 54. Fixed spring; 55. Fixed wheel; 81. Side cylinder; 82. Side rod; 90. Second spring; 91. Dial indicator; 92. Sliding sleeve; 93. Roller; 94. Fixed clamp; 95. Sliding rod; 96. Contact rod. Detailed Implementation

[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] See attached document Figure 1-6This utility model discloses a tooling device for detecting the radial height of the oil chamber contact of an on-load tap changer. It includes a fixed structure 5 supported on the oil chamber flange, a side arm 8 rotatably connected to the fixed structure 5, and a drive structure for rotating the side arm 8. The fixed structure 5 includes a cam 51 coaxially arranged with the oil chamber and the side arm 8. A side plate 9 extending radially is fixedly connected to the side arm 8. The side plate 9 is provided with a measuring device, a slide rod 95 that moves radially and presses against the contact rod 96 of the measuring device, and an elastic device that drives the slide rod 95 to contact the inner wall of the oil drum. The measuring device includes a dial indicator 91.

[0036] The fixed structure 5 includes a fixed disk 50, a cam 51 that is axially connected to the fixed disk 50 via a first rotating shaft, and push rods 53 that are evenly arranged circumferentially along the cam 51 and slidably connected radially to the fixed disk 50. There are three push rods 53, and the first rotating shaft is fixedly connected to the cam 51.

[0037] The fixed plate 50 is provided with a fixed block 52 corresponding to the push rod 53, through which the push rod 53 passes. The fixed block 52 is provided with a fixed spring 54, and the other end of the fixed spring 54 is connected to the push rod 53. That is, the fixed plate 50 is provided with a fixed spring 54 that drives the push rod 53 to slide inward.

[0038] A bearing is installed on the fixed plate 50. The inner ring of the bearing is connected to the first rotating shaft, and the bottom end face of the outer ring of the bearing is connected to the side arm 8.

[0039] The protrusion on the cam 51 is correspondingly provided with the push rod 53, the inner side of the push rod 53 is in contact with the corresponding protrusion, and the outer side of the protrusion is an arc surface.

[0040] The fixed structure 5 also includes an outer disk 4 located outside the oil chamber, a worm gear reducer 3 mounted on the outer disk 4, a first handle wheel 1 mounted on the worm, and the first rotating shaft rotatably connected to the outer disk 4 and fixedly connected to the worm gear shaft.

[0041] Both ends of the push rod 53 are axially connected to fixed wheels 55, and the slide rod 95 is axially connected to rollers 93 that are in contact with the inner wall of the oil chamber.

[0042] A sliding sleeve 92 is fixedly connected to the sliding rod 95. A stop block is provided on the side plate 9 for the measuring device contact rod 96 to pass through. The elastic device includes a second spring 90 sleeved on the sliding rod 95 and located between the stop block and the sliding sleeve 92. A guide hole is also provided on the side plate 9 to guide the sliding sleeve 92 to move radially. A U-shaped fixing clip 94 is provided on the side plate 9. The fixing clip 94 is bolted to the side plate 9, and a guide hole is formed between the fixing clip 94 and the side plate 9.

[0043] The drive structure includes a gear disk 6 fixed to the side arm 8, a gear 7 meshing with the gear disk 6, and a rotating shaft fixed to the gear 7 and rotatably connected to the fixed structure 5. The gear disk and the side arm are arranged coaxially. The rotating shaft is rotatably connected to the fixed disk 50 and the outer disk 4. The rotating shaft extends to the oil chamber. A second handle wheel 2 located outside the oil chamber is fixed to the rotating shaft. The gear 7, the gear disk 6, and the rotating shaft form a spur gear 7 reducer.

[0044] The side arm 8 includes a side cylinder 81 and a side rod 82 slidably connected inside the side cylinder 81. The side plate 9 is fixedly connected to the side rod 82. The side cylinder 81 is rotatably connected to the fixed structure 5. The side cylinder 81 has a plurality of first through holes arranged along the height direction and extending radially. The side rod 82 has a plurality of second through holes arranged along the height direction and extending radially. The first through holes and the second through holes are connected by bolts and nuts.

[0045] Specifically, both the outer plate 4 and the fixed plate 50 are triangular, and the three sides of the triangle are all inwardly concave arcs. The radial direction is the diameter direction of the oil chamber, and the radial height of the oil chamber contact is the length of the protrusion of the oil chamber contact in the radial direction.

[0046] In use, the side arm 8 is inserted into the oil chamber, and the outer plate 4 contacts and limits the oil chamber flange end face. Then, the first handle wheel 1 is driven to drive the first rotating shaft and cam 51 to rotate through the worm gear reducer 3. The rotation of cam 51 causes the protrusion to drive the push rod 53 to slide synchronously and at the same distance in all directions, while stretching the fixing spring 54. When cam 51 rotates a certain angle, the protrusion drives one end of push rod 53 to push against the inner circumference of the flange. Under the action of several push rods 53, it is fixed on the oil chamber flange. Since the push rod 53 moves synchronously and at the same distance in the radial direction, the coaxial setting of cam 51 shaft and oil chamber is ensured.

[0047] At this time, cam 51 is set coaxially with the oil chamber, and side arm 8 is also set coaxially with the oil chamber. When slide rod 95 moves to a height coplanar with several oil chamber contacts, under the action of second spring 90, the end of slide rod 95 away from the measuring device, i.e., roller 93, contacts the inner wall of the oil chamber. Since side arm 8 is set coaxially with the oil chamber, the reading of dial indicator 91 is the same when slide rod 95 contacts the inner wall of the oil chamber during rotation. The second handle wheel 2 drives gear 7 and gear plate 6 to drive side arm 8 to rotate circumferentially. When slide rod 95 touches the oil chamber contact, the protruding oil chamber contact drives slide rod 95 to slide inward, compressing the elastic device. Slide rod 95 compresses the contact rod 96 of the measuring device, and then the value of the measuring device is read. By analogy, several oil chamber contacts located on the same circumference are measured, thereby directly obtaining measurement data and ensuring measurement accuracy.

[0048] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A tooling device for detecting the radial height of the oil chamber contacts of an on-load tap changer, characterized in that: The device includes a fixed structure (5) supported on the oil chamber flange, a side arm (8) rotatably connected to the fixed structure (5), and a drive structure that drives the side arm (8) to rotate. The fixed structure (5) includes a cam (51) coaxially arranged with the oil chamber and the side arm (8). A side plate (9) extending radially is fixed to the side arm (8). The side plate (9) is provided with a measuring device, a slide rod (95) that moves radially and presses the measuring device contact rod (96), and an elastic device that drives the slide rod (95) to contact the inner wall of the oil drum.

2. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 1, characterized in that: The fixed structure (5) includes a fixed disk (50), a cam (51) that is axially connected to the fixed disk (50) via a first rotating shaft, a push rod (53) that is arranged circumferentially along the cam (51) and slidably connected to the fixed disk (50) along the cam (51), and a fixed spring (54) that drives the push rod (53) to slide inward on the fixed disk (50). The protrusion on the cam (51) is correspondingly provided with the push rod (53), and the inner side of the push rod (53) is in contact with the corresponding protrusion.

3. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 2, characterized in that: The fixed structure (5) also includes an outer disk (4) located outside the oil chamber, a worm gear reducer (3) mounted on the outer disk (4), a first handle wheel (1) mounted on the worm, and the first rotating shaft rotatably connected to the outer disk (4) and fixed to the worm gear shaft.

4. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 2, characterized in that: The fixed plate (50) is provided with a fixed block (52) corresponding to the push rod (53) for the push rod (53) to pass through. The fixed block (52) is provided with a fixed spring (54), and the other end of the fixed spring (54) is connected to the push rod (53).

5. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 2, characterized in that: Both ends of the push rod (53) are connected to fixed wheels (55), and the slide rod (95) is connected to a roller (93) that is in contact with the inner wall of the oil chamber.

6. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 1, characterized in that: A sliding sleeve (92) is fixedly connected to the sliding rod (95). A stop block is provided on the side plate (9) for the measuring device contact rod (96) to pass through. The elastic device includes a second spring (90) sleeved on the sliding rod (95) and located between the stop block and the sliding sleeve (92). A guide hole is also provided on the side plate (9) to guide the sliding sleeve (92) to move radially.

7. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 1, characterized in that: The drive structure includes a gear (6) fixed to the side arm (8), a gear (7) meshing with the gear (6), and a rotating shaft fixed to the gear (7) and rotatably connected to the fixed structure (5). A second handle wheel (2) located outside the oil chamber is fixed to the rotating shaft.

8. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 1, characterized in that: The measuring device includes a dial gauge (91).

9. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 2, characterized in that: The first rotating shaft is provided with a bearing, and the outer circle of the bearing is connected to the side arm (8).

10. The tooling equipment for detecting the radial height of the oil chamber contacts of an on-load tap changer according to claim 1, characterized in that: The side arm (8) includes a side tube (81) and a side rod (82) slidably connected inside the side tube (81). The side plate (9) is fixed to the side rod (82). The side tube (81) is rotatably connected to the fixed structure (5). The side tube (81) has a plurality of first through holes arranged along the height direction and extending radially. The side rod (82) has a plurality of second through holes arranged along the height direction and extending radially. The first through holes and the second through holes are connected by bolts and nuts.

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