Positioning device for preventing deformation of current transformer shell

Abstract

The invention relates to the field of current transformers, in particular to a positioning device for preventing deformation of a shell of a current transformer, and solves the problem of convenience in positioning a circular ring part. The device comprises an upper clamping plate and a lower clamping plate which can move oppositely, the lower clamping plate is provided with a side clamping mechanism, the side clamping mechanism comprises a plurality of inner side clamping pieces and outer side clamping pieces, the inner side clamping pieces are arranged on the lower clamping plate along the circumference, each inner side clamping piece comprises an inner side rotating shaft rotationally arranged on the lower clamping plate, each inner side rotating shaft is provided with an inner side clamping arm, and each inner side clamping arm is provided with an outer side clamping arm. Inner side positioning pieces are rotatably arranged at the ends, away from the inner side rotating shafts, of the inner side clamping arms, the multiple outer side clamping pieces are arranged on the circumferential sides of the multiple inner side clamping pieces in the circumferential direction, each outer side clamping piece comprises an outer side rotating shaft rotatably arranged on the lower clamping plate, outer side clamping arms are arranged on the outer side rotating shafts, and outer side positioning pieces are rotatably arranged at the ends, away from the outer side rotating shafts, of the outer side clamping arms; the inner side clamping piece and the outer side clamping piece can be used for current transformers of different specifications through the adjustable positioning pieces, and use is more flexible.

Description

Technical Field

[0001] This invention relates to the field of current transformer technology, and more specifically to a positioning device for preventing deformation of the housing of a current transformer. Background Technology

[0002] A current transformer consists of an iron core, a coil, and a housing. The housing is wrapped around the iron core and the coil. Since the housing of a current transformer is generally made of rubber, which is relatively soft, the housing is easily deformed when squeezed after being filled with epoxy resin. This affects the overall size and aesthetics, resulting in a low pass rate and increased costs. In order to prevent the housing of the current transformer from deforming, it is necessary to position the housing.

[0003] When positioning the housing of a current transformer, an upper clamping plate and a lower support plate are generally used to clamp and fix the housing from the top and bottom. For better positioning, the sides of the housing are also used. However, positioning the sides of the housing can be inconvenient due to the curved surface of the circular part. In addition, there is another positioning device with a placement groove that fits the circular part of the housing. This allows the circular part of the housing to be placed in the groove for positioning. However, this device can only be used for current transformers of certain specifications, which limits its application.

[0004] Therefore, the present invention provides a positioning device to prevent deformation of the housing of a current transformer, so as to solve the above-mentioned problems. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a positioning device for preventing deformation of the housing of a current transformer. The problem to be solved is: to provide a positioning device for the deformation of the housing of a current transformer that facilitates positioning of the circular part.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A positioning device for preventing deformation of the housing of a current transformer includes an upper clamping plate and a lower clamping plate that can move in opposite directions. The lower clamping plate is provided with a side clamping mechanism. The side clamping mechanism includes a plurality of inner clamping parts and outer clamping parts. The plurality of inner clamping parts are arranged circumferentially on the lower clamping plate. Each inner clamping part includes an inner rotating shaft rotatably mounted on the lower clamping plate. An inner clamping arm is provided on the inner rotating shaft. An inner positioning element is rotatably provided at the end of the inner clamping arm away from the inner rotating shaft. The plurality of outer clamping parts are arranged circumferentially on the periphery of the plurality of inner clamping parts. Each outer clamping part includes an outer rotating shaft rotatably mounted on the lower clamping plate. An outer clamping arm is provided on the outer rotating shaft. An outer positioning element is rotatably provided at the end of the outer clamping arm away from the outer rotating shaft. During operation, the circular part of the current transformer housing is placed on the lower clamp plate between several inner and outer clamps. Then, the inner and outer rotating shafts are controlled to rotate, and the inner and outer positioning parts are used to position and protect the inner and outer sides of the circular part of the current transformer housing. Finally, the upper clamp plate is controlled to move closer to the lower clamp plate to position and protect the upper and lower sides of the circular part of the current transformer housing.

[0007] Preferably, it also includes a control mechanism for controlling the rotation of the inner and outer rotating shafts. The bottom of the inner rotating shaft passes through the lower clamping plate and is connected to the inner driven gear. The bottom of the outer rotating shaft passes through the lower clamping plate and is connected to the outer driven gear. The lower side of the lower clamping plate is provided with an inner annular rack that meshes with each inner rotating shaft and an outer annular rack that meshes with each outer rotating shaft. By controlling the rotation of one inner rotating shaft and one outer rotating shaft, several inner rotating shafts and outer rotating shafts are driven to rotate synchronously.

[0008] Preferably, one of the inner rotating shafts has an inner driving gear at its bottom, and one of the outer rotating shafts has an outer driving gear at its bottom. It also includes an inner spur rack and an outer spur rack that are slidably disposed relative to the lower clamping plate. The inner spur rack is adapted to the inner driving gear, and the outer spur rack is adapted to the outer driving gear. A first elastic telescopic rod is provided between the inner spur rack and the outer spur rack. During operation, the inner and outer spur racks slide together first, driving one of the drive gears to rotate through one of the spur racks. When the drive gear rotates to its maximum angle, the first elastic telescopic rod extends or retracts, and the other spur rack drives the other drive gear to rotate.

[0009] Preferably, the rack that drives the drive gear is connected to the plate body, and also includes a push-pull rod slidably disposed on the clamping plate. A second elastic telescopic rod is provided between the push-pull rod and the plate body. A hinge rod is hinged to the push-pull rod and the plate body. The two hinge rods are hinged together to a hinge block. A slide rod is slidably disposed at the bottom of the lower clamping plate. The hinge block is slidably disposed on the slide rod. The slide rod is connected to a slide plate. The slide plate is provided with a locking tooth and is engaged with an upper positioning gear. The upper positioning gear is connected to an upper positioning screw. The upper positioning screw passes through the lower clamping plate and is rotatably connected to the lower clamping plate. It is also threadedly connected to the upper clamping plate. A limiting telescopic rod is also provided between the upper clamping plate and the lower clamping plate. During operation, the push-pull rod drives the two racks to move. Initially, the distance between the push-pull rod and the plate remains unchanged. When the rack that drives the drive gear moves to its maximum position, the push-pull rod continues to move, and the distance between it and the plate changes. This causes the hinge block to push the slide rod to move. The slide rod then drives the slide plate, the upper positioning gear, and the upper positioning screw to move in sequence, bringing the upper clamping plate closer to the lower clamping plate.

[0010] Preferably, the lower clamping plate has a protective shell at its bottom, and the push-pull rod has an operating mechanism. The operating mechanism includes a push-pull plate connected to the push-pull rod, and an adjusting screw, a threaded sleeve, and a rotating adjusting component are provided between the push-pull plate and the protective shell.

[0011] Preferably, the protective shell is snapped into the lower clamping plate, and the operating mechanism is detachably connected to the protective shell.

[0012] Preferably, the upper clamping plate is hinged to the flip plate and the lifting plate, and the lifting plate is connected to the upper positioning screw and the limiting telescopic rod.

[0013] Preferably, a torsion spring is provided at the hinge joint between the flip plate and the lifting plate.

[0014] Preferably, both the inner and outer positioning elements are rollers.

[0015] Preferably, the upper and lower clamping plates are provided with matching through holes.

[0016] The beneficial effects of this invention are as follows: 1. This invention can not only clamp and fix the current transformer housing from the upper and lower sides of the outer shell through the upper and lower clamping plates, but also clamp it from the inner and outer sides of the outer shell ring through the inner and outer clamping parts. This can achieve a better clamping and fixing effect on the current transformer, prevent deformation, and the inner and outer clamping parts can be used for current transformers of different specifications through adjustable positioning parts, making it more flexible to use.

[0017] 2. The present invention uses an upper clamping plate, a lower clamping plate, an inner clamping piece, and an outer clamping piece to simultaneously clamp and position the current transformer housing. The current transformer is positioned relatively accurately after positioning, which facilitates subsequent potting operations.

[0018] 3. In this invention, the clamping component clamps and positions the side of the current transformer by rotating the positioning component. The positioning component can rotate adaptively as the clamping is gradually performed, ensuring the strength of the clamping and reducing friction when in contact with the outer shell, thereby preventing the positioning component from damaging the outer shell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the inner clamp and the outer clamp in this invention; Figure 3 This is a schematic diagram of the control mechanism in this invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram illustrating the principle of how the push-pull rod drives the outer straight rack, the inner straight rack, and the slide rod in this invention. Figure 6 This is a schematic diagram of the flap being flipped up in this invention; Figure 7 This is a schematic diagram of the invention when it is used in conjunction with the rotating base.

[0020] In the diagram: 1. Upper clamping plate, 101. Flip plate, 102. Lifting plate, 2. Lower clamping plate, 3. Operating mechanism, 301. Threaded sleeve, 302. Adjusting component, 303. Adjusting screw, 304. Push-pull plate, 4. Protective shell, 5. Inner clamping component, 501. Inner rotating shaft, 502. Inner clamping arm, 503. Inner positioning component, 6. Outer clamping component, 601. Outer rotating shaft, 602. Outer clamping arm, 603. Outer positioning component, 7. Control mechanism, 701. Inner ring rack, 702. Inner driven gear, 7 03. Inner driving gear; 704. Outer ring rack; 705. Outer driven gear; 706. Outer driving gear; 707. Outer spur rack; 708. First elastic telescopic rod; 709. Inner spur rack; 710. Connecting rod; 711. Plate; 712. Push-pull rod; 713. Slide plate; 714. Upper positioning gear; 715. Upper positioning screw; 716. Limiting telescopic rod; 717. Slide rod; 718. Hinge block; 719. Hinge rod; 720. Second elastic telescopic rod; 8. Rotating base. Detailed Implementation

[0021] The following will refer to the attached reference. Figures 1 to 7 The various embodiments of the present invention will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] A positioning device to prevent deformation of the housing of a current transformer, as shown in the attached figure. Figure 1 As shown, it includes an upper clamping plate 1 and a lower clamping plate 2 that can move towards each other, that is, the upper clamping plate 1 and the lower clamping plate 2 can move closer to each other or further away from each other. In specific use, the annular part of the current transformer housing is placed on the lower clamping plate 2. By controlling the upper clamping plate 1 and the lower clamping plate 2 to move closer to each other, the current transformer can be clamped and fixed from the upper and lower sides. This part is existing technology and will not be described in detail here.

[0023] As attached Figure 1 , Figure 2As shown, a side clamping mechanism is provided on the lower clamping plate 2. The side clamping mechanism includes several inner clamping parts 5 and outer clamping parts 6. In this embodiment, three inner clamping parts 5 and three outer clamping parts 6 are provided. Several inner clamping parts 5 are arranged equidistantly on the lower clamping plate 2 along the circumference. The inner clamping part 5 includes an inner rotating shaft 501 rotatably mounted on the lower clamping plate 2. An inner clamping arm 502 is provided on the inner rotating shaft 501. An inner positioning part 503 is rotatably provided at the end of the inner clamping arm 502 away from the inner rotating shaft 501. Specifically, the inner positioning part 503 and the outer positioning part 603 are both rollers. Several outer clamping parts 6 are arranged equidistantly on the periphery of several inner clamping parts 5 along the circumference. The outer clamping part 6 includes an outer rotating shaft 601 rotatably mounted on the lower clamping plate 2. An outer clamping arm 602 is provided on the outer rotating shaft 601. An outer positioning part 603 is rotatably provided at the end of the outer clamping arm 602 away from the outer rotating shaft 601.

[0024] Working principle: Through the synchronous movement of several inner clamping parts 5, that is, the rotation of the inner rotating shaft 501, several inner clamping arms 502 move outward, driving several inner positioning parts 503 to move outward, thereby positioning it from the inside of the annular part of the current transformer housing; through the synchronous movement of several outer clamping parts 6, that is, the rotation of the outer rotating shaft 601, several outer clamping arms 602 move inward, driving several outer positioning parts 603 to move inward, thereby positioning it from the outside of the annular part of the current transformer housing.

[0025] During operation, the annular portion of the current transformer housing is placed on the lower clamping plate 2 between several inner clamping pieces 5 and outer clamping pieces 6. Then, the inner rotating shaft 501 and the outer rotating shaft 601 are controlled to rotate synchronously. The inner and outer positioning pieces 503 and 603 provide positioning protection for the inner and outer sides of the annular portion of the current transformer housing. Finally, the upper clamping plate 1 is controlled to move closer to the lower clamping plate 2 to provide positioning protection for the upper and lower sides of the annular portion of the current transformer housing.

[0026] In this invention, multiple inner clamps 5 and outer clamps 6 are used to clamp and fix the inner and outer sides of the annular portion. Combined with the upper clamping plate 1 and lower clamping plate 2, this allows for maximum coverage of the current transformer housing, preventing deformation. The adjustable inner clamps 5 and outer clamps 6 enable use with current transformers of different specifications, providing greater flexibility. After positioning the annular portion of the housing, the housing's axis aligns with the overall axis of the inner clamps 5 and outer clamps 6, allowing control over the position of the current transformer housing and facilitating subsequent potting operations. When clamping and fixing the current transformer housing, the inner positioning element 503 and outer positioning element 603 can rotate adaptively, resulting in sliding friction when in contact with the housing. This ensures positioning strength while preventing damage to the housing.

[0027] In addition, it should be noted that in actual production and use, the present invention should be provided with as many inner clamps 5 and outer clamps 6 as possible, so as to clamp and fix the shell as much as possible. The inner clamp arm 502 and the inner rotating shaft 501 are detachably connected, such as by snap-fit ​​or threaded connection. Similarly, the outer clamp arm 602 and the outer rotating shaft 601 are detachably connected. When clamping and fixing the shells of current transformers of different specifications, an appropriate number of clamp arms can be installed and removed as needed to avoid mutual interference between the clamp arms. At the same time, more positioning parts can be made to contact the ring part of the shell.

[0028] As attached Figure 1 , Figure 2 , Figure 3 As shown, it also includes a control mechanism 7 for controlling the rotation of the inner rotating shaft 501 and the outer rotating shaft 601. The bottom of the inner rotating shaft 501 passes through the lower clamping plate 2 and is connected to the inner driven gear 702. The bottom of the outer rotating shaft 601 passes through the lower clamping plate 2 and is connected to the outer driven gear 705. The lower clamping plate 2 is rotatably provided with an inner annular rack 701 that meshes with each inner rotating shaft 501 and an outer annular rack 704 that meshes with each outer rotating shaft 601. By controlling the rotation of one inner rotating shaft 501 and an outer rotating shaft 601, several inner rotating shafts 501 and outer rotating shafts 601 are driven to rotate synchronously. In actual use, the outer annular rack 704 is first controlled to rotate so that the outer positioning piece 604 is positioned from the outside of the outer ring part. Then, the inner ring 701 is controlled to rotate, and the inner positioning piece 503 is used to position it from the inside of the outer ring part.

[0029] As attached Figure 1 , Figure 2 , Figure 3 As shown, one of the inner rotating shafts 501 has an inner driving gear 703 at its bottom, and one of the outer rotating shafts 601 has an outer driving gear 706 at its bottom. In this embodiment, the outer driving gear 706 and the inner driving gear 703 are arranged one after the other. It also includes an inner spur rack 709 and an outer spur rack 707 that are slidably arranged relative to the lower clamping plate 2. Similarly, the outer spur rack 707 and the inner spur rack 709 are arranged one after the other. The inner spur rack 709 is adapted to the inner driving gear 703, and the outer spur rack 707 is adapted to the outer driving gear 706. A first elastic telescopic rod 708 is provided between the inner spur rack 709 and the outer spur rack 707. During operation, the inner rack 709 and the outer rack 707 slide forward together. The outer rack 707 first drives the outer drive gear 706 to rotate. When the outer drive gear 706 rotates to its maximum angle, the outer clamp 6 completes the positioning of the outer shell. At the same time, the outer rack 707 can no longer move forward. As the inner rack 709 continues to move forward, the first elastic telescopic rod 708 shortens, and the inner rack 709 begins to drive the inner drive gear 703 to rotate. When the inner drive gear 703 rotates to its maximum angle, the inner clamp 5 completes the positioning of the outer shell. At the same time, the inner rack 709 can no longer move forward. That is, during operation, it is only necessary to control the inner rack 709 to move forward until it can no longer move to complete the positioning of the side of the annular part of the outer shell.

[0030] As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the inner straight rack 709 is connected to the plate 711 via a connecting rod 710. It also includes a push-pull rod 712 that slides along the lower clamping plate 2 in the front-rear direction. The push-pull rod 712 is located behind the plate 711. A second elastic telescopic rod 720 is provided between the push-pull rod 712 and the plate 711. A hinge rod 719 is hinged to the push-pull rod 712 and the plate 711. The two hinge rods 719 are hinged together to a hinge block 718. A sliding rod 7 is slidably provided at the bottom of the lower clamping plate 2. 17. The sliding rod 717 slides in the left and right direction. The hinge block 718 slides on the sliding rod 717 in the front and back direction. The sliding rod 717 is connected to the slide plate 713. The slide plate 713 is provided with a locking tooth and is engaged with the upper positioning gear 714. The upper positioning gear 714 is connected to the upper positioning screw 715. The upper positioning screw 715 passes through the lower clamping plate 2 and is rotatably connected to the lower clamping plate 2. It is also threadedly connected to the upper clamping plate 1. A limiting telescopic rod 716 is also provided between the upper clamping plate 1 and the lower clamping plate 2.

[0031] During operation, the push-pull rod 712 drives the two racks to move. Initially, the distance between the push-pull rod 712 and the plate 711 remains constant, and both move forward together. The hinge block 718 also moves forward, driving the inner rack 709 forward. When the inner rack 709 can no longer move forward, the inner clamp 5 and outer clamp 6 clamp and fix the outer ring portion of the outer shell in place. The push-pull rod 712 continues to move, while the position of the plate 711 remains unchanged. The second... The elastic telescopic rod 720 shortens, the distance between the push-pull rod 712 and the plate 711 becomes shorter, driving the hinge block 718 to move in the left and right direction, pushing the slide rod 717 to move in the left and right direction, and the slide rod 717 drives the slide plate 713 to move in the left and right direction. The slide plate 713 drives the upper positioning gear 714 and the upper positioning screw 715 to move through the locking teeth, so that the upper clamping plate 1 is close to the lower clamping plate 2. That is, during operation, it is only necessary to control the push-pull rod 712 to move forward until it can no longer move to complete the positioning of the side and upper and lower sides of the outer ring part.

[0032] In addition, it should be noted that in this invention, both the first elastic telescopic rod 708 and the second elastic telescopic rod 720 can be telescopic rods combined with spring structures, and the sequential movement of the grid structure can be achieved through the elasticity of the springs in the second elastic telescopic rod 720 and the first elastic telescopic rod 708.

[0033] As attached Figure 1 , Figure 3 As shown, a protective shell 4 is provided at the bottom of the lower clamping plate 2. The protective shell 4 is used to protect the various structures below the lower clamping plate 2. The push-pull rod 712 is provided with an operating mechanism 3. The operating mechanism 3 includes a push-pull plate 304 connected to the push-pull rod 712. An adjusting screw 303, a threaded sleeve 301, and a rotating adjusting component 302 are provided between the push-pull plate 304 and the protective shell 4. Specifically, the threaded sleeve 301 is rotatably mounted on the protective shell 4, and the adjusting component 302 is fixedly mounted on the threaded sleeve 301 with a hexagonal nut. The adjusting screw 303 is fixedly mounted on the push-pull plate 304 and threadedly engaged with the threaded sleeve 301. The operation can be performed by rotating the adjusting component 302. In addition, in this invention, the protective shell 4 is snapped into the lower clamping plate 2, and the operating mechanism 3 is detachably connected to the protective shell 4, which facilitates the inspection and maintenance of various structures.

[0034] In addition, it should be noted that when this invention is used, it can be used in conjunction with the rotating base 8. The rotating base 8 is ring-shaped, and the protective shell 4 is rotatably mounted on the rotating base 8. After the current transformer shell is positioned, the position of the shell can be slightly rotated to adjust the position, so that the position of the shell can be determined each time. This makes it easier to set the position of the potting device during the actual potting process, and makes it more convenient to use.

[0035] As attached Figure 1 , Figure 3 , Figure 6As shown, the upper clamping plate 1 is hinged to the flip plate 101 and the lifting plate 102. The lifting plate 102 is connected to the upper positioning screw 715 and the limiting telescopic rod 716. When the outer shell is being protected, the flip plate 101 can be flipped up to expose the lower clamping plate 2, which is convenient for placing the outer shell. When the flip plate 101 is flipped up, one side of the flip plate 101 is lower than the lifting plate 102. When the lifting plate 102 is lowered to the lowest position, the flip plate 101 can be automatically positioned and cannot rotate on its own. In this invention, a torsion spring is also provided at the hinge of the flip plate 101 and the lifting plate 102, which can elastically limit the flip plate 101 and prevent the flip plate 101 from shaking during normal operation.

[0036] As attached Figure 1 , Figure 2 , Figure 3 As shown, the upper clamping plate 1 and the lower clamping plate 2 of this invention are provided with matching through holes. After the outer ring part is clamped and fixed in position, the hollow part of the outer ring is matched with the through hole. After potting, the wire can be passed through it for testing to ensure the quality of the current transformer.

[0037] Additionally, it should be noted that the connecting rod 710 prevents various structures from obstructing the through holes.

[0038] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A positioning device for preventing deformation of the housing of a current transformer, comprising an upper clamping plate (1) and a lower clamping plate (2) capable of moving in opposite directions, characterized in that, The lower clamping plate (2) is provided with a side clamping mechanism. The side clamping mechanism includes several inner clamping parts (5) and outer clamping parts (6). Several inner clamping parts (5) are arranged circumferentially on the lower clamping plate (2). Each inner clamping part (5) includes an inner rotating shaft (501) rotatably disposed on the lower clamping plate (2). An inner clamping arm (502) is provided on the inner rotating shaft (501). An inner positioning part (503) is rotatably disposed at the end of the inner clamping arm (502) away from the inner rotating shaft (501). Several outer clamping parts (6) are arranged circumferentially on the sides of the several inner clamping parts (5). Each outer clamping part (6) includes an outer rotating shaft (601) rotatably disposed on the lower clamping plate (2). An outer clamping arm (602) is provided on the outer rotating shaft (601). An outer positioning part (603) is rotatably disposed at the end of the outer clamping arm (602) away from the outer rotating shaft (601). During operation, the circular part of the current transformer housing is placed on the lower clamping plate (2) between several inner clamping parts (5) and outer clamping parts (6). Then, the inner rotating shaft (501) and the outer rotating shaft (601) are controlled to rotate. The inner and outer sides of the circular part of the current transformer housing are positioned and protected by the inner positioning part (503) and the outer positioning part (603). Finally, the upper clamping plate (1) is controlled to approach the lower clamping plate (2) to position and protect the upper and lower sides of the circular part of the current transformer housing.

2. The positioning device for preventing deformation of the housing of a current transformer according to claim 1, characterized in that, It also includes a control mechanism (7) for controlling the rotation of the inner rotating shaft (501) and the outer rotating shaft (601). The bottom of the inner rotating shaft (501) passes through the lower clamping plate (2) and is connected to the inner driven gear (702). The bottom of the outer rotating shaft (601) passes through the lower clamping plate (2) and is connected to the outer driven gear (705). The lower clamping plate (2) is rotatably provided with an inner ring rack (701) that meshes with each inner rotating shaft (501) and an outer ring rack (704) that meshes with each outer rotating shaft (601). By controlling the rotation of one inner rotating shaft (501) and one outer rotating shaft (601), several inner rotating shafts (501) and outer rotating shafts (601) are driven to rotate synchronously.

3. The positioning device for preventing deformation of the housing of a current transformer according to claim 2, characterized in that, One of the inner rotating shafts (501) has an inner driving gear (703) at its bottom, and one of the outer rotating shafts (601) has an outer driving gear (706) at its bottom. It also includes an inner spur rack (709) and an outer spur rack (707) that are slidably disposed relative to the lower clamping plate (2). The inner spur rack (709) is adapted to the inner driving gear (703), and the outer spur rack (707) is adapted to the outer driving gear (706). A first elastic telescopic rod (708) is provided between the inner spur rack (709) and the outer spur rack (707). During operation, the inner rack (709) and the outer rack (707) slide together first, and drive one of the drive gears to rotate through one rack. When the drive gear rotates to the maximum angle, the first elastic telescopic rod (708) extends and retracts, and the other rack drives the other drive gear to rotate.

4. A positioning device for preventing deformation of a current transformer housing according to claim 3, characterized in that, The rack that drives the drive gear is connected to the plate (711), and also includes a push-pull rod (712) slidably disposed on the lower clamping plate (2). A second elastic telescopic rod (720) is provided between the push-pull rod (712) and the plate (711). A hinge rod (719) is hinged to the push-pull rod (712) and the plate (711). The two hinge rods (719) are hinged together to a hinge block (718). A slide rod (717) is slidably disposed at the bottom of the lower clamping plate (2). The hinge block (718) 718) Sliding arrangement on slide rod (717), slide rod (717) is connected to slide plate (713), slide plate (713) is provided with locking teeth and meshing with upper positioning gear (714), upper positioning gear (714) is connected to upper positioning screw (715), upper positioning screw (715) passes through lower clamping plate (2) and is rotatably connected to lower clamping plate (2), and is threadedly connected to upper clamping plate (1), and a limiting telescopic rod (716) is also provided between upper clamping plate (1) and lower clamping plate (2). During operation, the push-pull rod (712) drives the two racks to move. Initially, the distance between the push-pull rod (712) and the plate (711) remains unchanged. When the rack that drives the drive gear moves to its maximum position, the push-pull rod (712) continues to move, and the distance between it and the plate (711) changes. This causes the hinge block (718) to push the slide rod (717) to move. The slide rod (717) then drives the slide plate (713), the upper positioning gear (714), and the upper positioning screw (715) to move in sequence, causing the upper clamping plate (1) to move closer to the lower clamping plate (2).

5. A positioning device for preventing deformation of a current transformer housing according to claim 4, characterized in that, The lower clamping plate (2) is provided with a protective shell (4) at the bottom. The push-pull rod (712) is provided with an operating mechanism (3). The operating mechanism (3) includes a push-pull plate (304) connected to the push-pull rod (712). An adjusting screw (303), a threaded sleeve (301), and a rotating adjusting component (302) are provided between the push-pull plate (304) and the protective shell (4).

6. A positioning device for preventing deformation of a current transformer housing according to claim 5, characterized in that, The protective shell (4) is snapped into the lower clamping plate (2), and the operating mechanism (3) is detachably connected to the protective shell (4).

7. A positioning device for preventing deformation of a current transformer housing according to claim 4, characterized in that, The upper clamping plate (1) is hinged to the flip plate (101) and the lifting plate (102), and the lifting plate (102) is connected to the upper positioning screw (715) and the limiting telescopic rod (716).

8. A positioning device for preventing deformation of a current transformer housing according to claim 7, characterized in that, A torsion spring is provided at the hinge joint between the flap (101) and the lifting plate (102).

9. A positioning device for preventing deformation of a current transformer housing according to any one of claims 1-8, characterized in that, Both the inner positioning element (503) and the outer positioning element (603) are rollers.

10. A positioning device for preventing deformation of a current transformer housing according to any one of claims 1-8, characterized in that, The upper clamping plate (1) and the lower clamping plate (2) are provided with matching through holes.

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