A magnetic isolation design method for current transformer and current transformer

Abstract

The present invention belongs to the technical field of current transformers, and in particular, relates to a magnetic isolation design method for a current transformer and a current transformer, comprising the following steps: S1, fixing a transformer housing on an operating table by means of a fixing component, and marking the position and size of a magnetic isolation groove on the inner wall and the outer wall of the transformer housing respectively; S2, using a slotting component to respectively open magnetic isolation grooves on the inner wall and the outer wall of the transformer housing according to the marked position and size of the magnetic isolation groove; S3, filling the magnetic isolation groove with a non-magnetic material by means of a filling component, fitting a sealing gasket at the upper mouth of the magnetic isolation groove, and sealing the non-magnetic material in the magnetic isolation groove. By means of the magnetic isolation groove design method, the magnetic fields of the primary winding and the secondary winding inside the current transformer can be effectively isolated, the magnetic interference inside the current transformer can be reduced, and at the same time, the magnetic interference of the external magnetic field on the current transformer can be effectively isolated, thereby improving the measurement accuracy of the current transformer.

Description

Technical Field

[0001] The invention belongs to the technical field of current transformers, and in particular relates to a magnetic isolation design method for a current transformer and a current transformer. Background Art

[0002] In the application of current transformers, measurement accuracy is one of the key indicators. Electromagnetic interference is easily generated between the primary winding and the secondary winding inside the current transformer, and the external magnetic field is also easy to interfere with the magnetic field inside the current transformer. In traditional designs, it is difficult to completely isolate the influence of the magnetic field generated by the primary winding on the secondary winding, and the influence of the external magnetic field on the magnetic field inside the current transformer, resulting in measurement errors.

[0003] For example, the current transformer with patent application number CN202311000105.2 includes a shell, a magnetic core, a winding and a mounting base, the magnetic core is provided with a cavity, the cavity is filled with gas that expands when heated; the mounting base is provided with a box body, and the box body is provided with a telescopic rod connected to the magnetic core cavity; the winding is provided with a No. 1 connection and a No. 2 connection, and the ends of the No. 1 connection and the No. 2 connection away from the winding are arranged in the box body; the telescopic rod is provided with a movable wire, and the telescopic rod drives the movable wire to move on the surface of the No. 1 connection during the extension process. However, the disadvantage of this technical solution is that electromagnetic interference is easily generated between the primary winding and the secondary winding inside the current transformer, and the external magnetic field is also easy to interfere with the magnetic field inside the current transformer, which is easy to cause measurement errors. Summary of the invention

[0004] The object of the present invention is to provide a current transformer magnetic isolation design method and a current transformer to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A method for designing magnetic isolation of a current transformer comprises the following steps:

[0006] S1. Fix the transformer housing on the operating table through fixing components, and mark the position and size of the magnetic isolation groove on the inner wall and outer wall of the transformer housing respectively;

[0007] S2. According to the marked magnetic isolation groove position and size, use the slotting components to respectively open magnetic isolation grooves on the inner wall and outer wall of the transformer housing;

[0008] S3. Fill the non-magnetic material into the magnetic isolation groove through a filling component, attach a sealing gasket to the upper opening of the magnetic isolation groove, and seal the non-magnetic material in the magnetic isolation groove.

[0009] Furthermore, in step S2, while the slotting component respectively forms magnetic isolation grooves on the inner wall and the outer wall of the transformer housing, the slotting component absorbs the debris generated by forming the magnetic isolation grooves.

[0010] Further, in step S3, after the filler component fills the magnetic isolation groove with the non-magnetic material, the transformer housing is driven to vibrate by the vibration component, so that the non-magnetic material fills the gap in the magnetic isolation groove.

[0011] Furthermore, the fixing component is arranged on the operating table, the fixing component fixes the transformer housing on the operating table, the center column is inserted into the fixing component, the ends of the slotted component and the filler component are rotated on the center column, the slotted component opens magnetic isolation grooves on the inner wall and the outer wall of the transformer housing respectively, the filler component fills the non-magnetic material into the magnetic isolation groove, and the vibration component is fixed on the operating table to knock on one side of the transformer housing.

[0012] Furthermore, the fixing component includes a support column, which is fixed on the operating table. The support column is slidably connected to the slider, the slider is threadedly connected to the center screw, the operating table and the support column are both rotatably connected to the center screw, a knob is fixed to the end of the center screw, the slider is rotatably connected to one end of the connecting rod, the other end of the connecting rod is rotatably connected to the support plate, the lower end of the support plate is slidably connected to the operating table, four support plates fix the transformer housing on the operating table, and the center column is plugged into the support column.

[0013] Furthermore, the slotted component includes a swivel ring, which rotates on the central column. The swivel ring is fixedly connected to an end of an outer rod. An inner rod is slidably connected inside the outer rod. A pointer is provided at one end of the inner rod, which points to a scale line on the outer rod. The other end of the inner rod is fixedly connected to the outer tube.

[0014] Furthermore, the outer tube is slidably connected to the inner tube, the outer tube is fixedly connected to one end of the spring, the other end of the spring is fixed on the inner tube, a limiting groove is provided on the outer tube, and a limiting column 2 is fixed on the inner tube, and the limiting column 2 is clamped in the limiting groove.

[0015] Furthermore, a motor 1 is fixed inside the inner tube, an output end of the motor 1 is connected to the drill bit, the inner tube is slidably connected to the collecting cover, the collecting cover is fixedly connected to one end of spring 2, the other end of spring 2 is fixedly connected to the inner tube, a through hole 1 and a collecting chamber are provided in the inner tube, a collecting tube is fixed to the side of the inner tube, the collecting chamber is connected to the collecting tube, an outer rod 1 is rotatably connected to a rotating rod, the rotating rod is fixed at an eccentric position of a limit plate, a rubber ring is provided outside the limit plate, and the rotating rod is rotated to drive the rubber ring outside the limit plate to be squeezed onto the upper edge of the inner rod 1.

[0016] Further, the filling component includes a swivel two, which rotates on the center column, and is fixedly connected to the two ends of the outer rod. The outer rod two is slidably connected to the inner rod two, and a pointer two is provided at one end of the inner rod two, and the pointer two points to the scale line two on the outer rod two. The other end of the inner rod two is fixed to the main tube, and a hopper is fixed at the upper end of the main tube, and a discharge pipe is slidably connected to the lower end of the main tube. The discharge pipe is fixedly connected to one end of a spring three, and the other end of the spring three is fixed to the main tube. A blocking column is provided in the discharge pipe, and the blocking column is inserted at the lower end of the main tube. A through hole two is provided at the connection between the discharge pipe and the blocking column.

[0017] A current transformer comprises a transformer housing designed according to any one of the above-mentioned current transformer magnetic isolation design methods, the transformer housing is filled with non-magnetic material, two transformer housings are buckled together, and an iron core with a coil wound therein is encapsulated therein.

[0018] The advantages of the present invention are:

[0019] The transformer housing is placed on the operating table, and the fixing component is located in the center hole of the transformer housing. The fixing component can be supported on the side wall of the center hole of the transformer housing, and then the transformer housing is fixed on the operating table, and the position and size of the magnetic isolation groove are marked on the inner wall and outer wall of the transformer housing respectively. According to the marked position and size of the magnetic isolation groove, the inner wall and outer wall of the transformer housing are opened with a slotting component, and the magnetic isolation grooves on the inner wall and outer wall are filled with non-magnetic material respectively with a filling component. The non-magnetic material can be selected from one of air, resin and non-magnetic metal to form effective magnetic isolation, and a sealing gasket is fitted at the upper mouth of the magnetic isolation groove to seal the non-magnetic material in the magnetic isolation groove. Through the above-mentioned magnetic isolation groove design method, the magnetic field of the primary winding and the secondary winding inside the current transformer can be effectively isolated, the magnetic interference inside the current transformer can be reduced, and the magnetic interference of the external magnetic field to the current transformer can be effectively isolated, thereby improving the measurement accuracy of the current transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of the magnetic isolation design method of the present invention;

[0021] Figure 2 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 3 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 4 The fixing component structure of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 5 for Figure 4 A partial enlarged view of the middle part;

[0025] Figure 6 The fixing component structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 7 The fixing component structure of the present invention is shown in FIG. Figure 3 ;

[0027] Figure 8 The structure of the slotted component of the present invention is schematically shown in FIG. Figure 1 ;

[0028] Fig. 9 The structure of the slotted component of the present invention is schematically shown in FIG. Figure 2 ;

[0029] Fig.10 for Fig. 9 A partial enlarged view of point B in the middle;

[0030] Fig.11 for Fig. 9 A partial enlarged view of point C in the middle;

[0031] Fig.12 It is a schematic diagram of the structure of the packing component of the present invention;

[0032] Fig.13 The structure of the vibration component of the present invention is schematically shown in FIG. Figure 1 ;

[0033] Fig.14 The structure of the vibration component of the present invention is schematically shown in FIG. Figure 2 ;

[0034] Fig.15 Schematic diagram of the vibration component structure of the present invention Figure 3 ;

[0035] Description of the markings in the figure:

[0036] Operation table 1; fixed part 2; support column 201; knob 202; central screw 203; slider 204; connecting rod 205; support plate 206; central column 3; slotted part 4; rotating ring 1 401; outer rod 1 402; inner rod 1 403; pointer 1 404; scale line 1 405; outer tube 406; inner tube 407; spring 1 408; limit groove 409; limit column 2 410; motor 1 411; drill bit 412; collection cover 413; spring 2 414; through hole 1 415; collection chamber 416; collection tube 417; rotating rod 418; limit plate 419 ; Filling component 5; swivel 2 501; outer rod 2 502; inner rod 2 503; pointer 2 504; main tube 505; hopper 506; spring 3 507; feed tube 508; blocking column 509; through hole 2 510; scale line 2 511; vibration component 6; housing 601; long slot 602; nut 603; motor 2 604; curved rod 605; rocker rod 606; moving rod 607; sliding plate 1 608; spring 4 609; knock hammer 610; sliding plate 2 611; spring 5 612; rubber block 613; outer cylinder 614; transformer housing 7; limit column 1 8. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1

[0040] like Figure 1-15 As shown, a current transformer magnetic isolation design method includes the following steps:

[0041] S1. Fix the transformer housing 7 on the operating table 1 through the fixing component 2, and mark the position and size of the magnetic isolation groove on the inner wall and outer wall of the transformer housing 7 respectively;

[0042] S2. According to the marked magnetic isolation groove position and size, use the slotting component 4 to respectively open magnetic isolation grooves on the inner wall and the outer wall of the transformer housing 7;

[0043] S3. Fill the non-magnetic material into the magnetic isolation groove through the filler component 5, and fit the sealing gasket on the upper opening of the magnetic isolation groove to seal the non-magnetic material in the magnetic isolation groove.

[0044] The working principle of the above technical solution is as follows: the transformer housing 7 is placed on the operating table 1, the fixing component 2 is located in the center hole of the transformer housing 7, the fixing component 2 can be supported on the side wall of the center hole of the transformer housing 7, and then the transformer housing 7 is fixed on the operating table 1, the position and size of the magnetic isolation groove are marked on the inner wall and the outer wall of the transformer housing 7 respectively, according to the marked position and size of the magnetic isolation groove, the slotting component 4 is used to open the magnetic isolation groove on the inner wall and the outer wall of the transformer housing 7 respectively, and the filling component 5 is used to fill the magnetic isolation groove on the inner wall and the outer wall with non-magnetic material respectively. The non-magnetic material can be selected from one of air, resin and non-magnetic metal to form effective magnetic isolation, and a sealing gasket is fitted at the upper mouth of the magnetic isolation groove to seal the non-magnetic material in the magnetic isolation groove. Through the above magnetic isolation groove design method, the magnetic field of the primary winding and the secondary winding inside the current transformer can be effectively isolated, the magnetic interference inside the current transformer can be reduced, and at the same time, the magnetic interference of the external magnetic field to the current transformer can be effectively isolated, thereby improving the measurement accuracy of the current transformer.

[0045] Embodiment 2

[0046] like Figure 1-15 As shown, in step S2, the slotting component 4 respectively forms magnetic isolation grooves on the inner wall and the outer wall of the transformer housing 7, and the slotting component 4 absorbs the debris generated by the opening of the magnetic isolation grooves;

[0047] The working principle of the above technical solution is: the side of the slotted component 4 is connected to a vacuum cleaner, and under the suction of the vacuum cleaner, the debris generated by the opening of the magnetic isolation slot is sucked away.

[0048] Embodiment 3

[0049] like Figure 1-15 As shown, in step S3, after the filler component 5 fills the magnetic isolation groove with non-magnetic material, the vibration component 6 drives the transformer housing 7 to vibrate so that the non-magnetic material fills the gap in the magnetic isolation groove;

[0050] The working principle of the above technical solution is: after the non-magnetic material fills the magnetic isolation groove, gaps are easily generated in the magnetic isolation groove, thereby affecting the magnetic isolation effect. The vibration component 6 drives the transformer housing 7 to vibrate, so that the non-magnetic material fills the gaps in the magnetic isolation groove, and then the filler component 5 is used to fill the sunken magnetic isolation groove, thereby reducing the gaps that are easily generated in the magnetic isolation groove and increasing the magnetic isolation effect.

[0051] Embodiment 4

[0052] like Figure 1-15 As shown, the fixing component 2 is arranged on the operating table 1, the fixing component 2 fixes the transformer housing 7 on the operating table 1, the center column 3 is plugged into the fixing component 2, the ends of the slotted component 4 and the filler component 5 are rotated on the center column 3, the slotted component 4 respectively opens magnetic isolation grooves on the inner wall and the outer wall of the transformer housing 7, the filler component 5 fills the magnetic isolation grooves with non-magnetic materials, and the vibration component 6 is fixed on the operating table 1 to knock one side of the transformer housing 7;

[0053] The working principle of the above technical solution is as follows: the transformer housing 7 is placed on the operating table 1, the fixing component 2 is located in the center hole of the transformer housing 7, the fixing component 2 can be supported on the side wall of the center hole of the transformer housing 7, and then the transformer housing 7 is fixed on the operating table 1, the center column 3 is plugged into the fixing component 2, the ends of the slotted component 4 and the filler component 5 are rotated on the center column 3, the slotted component 4 respectively opens magnetic isolation grooves on the inner wall and the outer wall of the transformer housing 7, the filler component 5 fills the non-magnetic material into the magnetic isolation groove, the vibration component 6 is fixed on the operating table 1, and one side of the transformer housing 7 is knocked to make the non-magnetic material in the magnetic isolation groove sink, fill the gap between the non-magnetic materials in the magnetic isolation groove, and prevent the formation of gaps in the magnetic isolation groove, thereby affecting the magnetic isolation effect.

[0054] Embodiment 5

[0055] like Figure 1-15 As shown, the fixing component 2 includes a support column 201, which is fixed on the operating table 1, and the support column 201 is slidably connected to the slider 204, and the slider 204 is threadedly connected to the central screw 203. The operating table 1 and the support column 201 are both rotatably connected to the central screw 203, and a knob 202 is fixed to the end of the central screw 203. The slider 204 is rotatably connected to one end of the connecting rod 205, and the other end of the connecting rod 205 is rotatably connected to the support plate 206. The lower end of the support plate 206 is slidably connected to the operating table 1. Four support plates 206 fix the transformer housing 7 on the operating table 1, and the central column 3 is plugged into the support column 201;

[0056] The working principle of the above technical solution is: the transformer housing 7 is placed on the operating table 1, the fixing component 2 is located in the center hole of the transformer housing 7, the knob 202 is turned to drive the center screw 203 to rotate, drive the slider 204 to slide downward on the support column 201, drive the four groups of connecting rods 205 to rotate, drive the four support plates 206 to slide with the operating table 1, the four support plates 206 move outward and abut against the inner wall of the center hole of the transformer housing 7, and then fix the transformer housing 7 on the operating table 1. Since the four support plates 206 can expand outward or gather inward on the operating table 1, the transformer housing 7 with center holes of different sizes can be fixed, and the adaptability is strong.

[0057] Embodiment 6

[0058] like Figure 1-15 As shown, the slotted component 4 includes a swivel 401, which rotates on the central column 3, and is fixedly connected to the end of an outer rod 402. An inner rod 403 is slidably connected inside the outer rod 402, and a pointer 404 is provided at one end of the inner rod 403, and the pointer 404 points to a scale line 405 on the outer rod 402. The other end of the inner rod 403 is fixedly connected to an outer tube 406;

[0059] The outer tube 406 is slidably connected to the inner tube 407, and the outer tube 406 is fixedly connected to one end of the spring 1 408, and the other end of the spring 1 408 is fixed to the inner tube 407. The outer tube 406 is provided with a limiting groove 409, and the inner tube 407 is fixed with a limiting column 2 410, and the limiting column 2 410 is clamped in the limiting groove 409;

[0060] A motor 411 is fixed in the inner tube 407, and the output end of the motor 411 is connected to the drill bit 412. The inner tube 407 is slidably connected to the collecting cover 413. The collecting cover 413 is fixedly connected to one end of the spring 414, and the other end of the spring 414 is fixedly connected to the inner tube 407. A through hole 415 and a collecting chamber 416 are provided in the inner tube 407. A collecting tube 417 is fixed on the side of the inner tube 407, and the collecting chamber 416 is connected to the collecting tube 417. The outer rod 402 is rotatably connected to the rotating rod 418, and the rotating rod 418 is fixed at the eccentric position of the limiting plate 419. The limiting plate 419 is provided with a rubber ring. The rotating rod 418 is rotated to drive the rubber ring on the outer side of the limiting plate 419 to be squeezed on the upper edge of the inner rod 403.

[0061] The working principle of the above technical solution is as follows: after the transformer housing 7 is fixed to the operating table 1 by the fixing component 2, the center column 3 is plugged into the supporting column 201. Since the rotating rod 418 is fixed at the eccentric position of the limiting plate 419, the rotating rod 418 is rotated to drive the limiting plate 419 to rotate, driving the rubber ring to separate from the upper edge of the inner rod 403, pulling the outer tube 406 outward, driving the outer rod 402 and the inner rod 403 to slide, driving the lower end of the drill bit 412 to be located directly above the magnetic isolation groove area, and at the same time, the pointer 404 moves to the scale corresponding to the scale line 405, and the rotating rod 418 is rotated to drive the limiting plate 419 to rotate, so that the rubber ring on the outer side of the limiting plate 419 is squeezed on the upper edge of the inner rod 403, thereby fixing the outer rod 402 and the inner rod 403 to prevent sliding between the outer rod 402 and the inner rod 403, thereby The distance between the center column 3 and the outer tube 406 is fixed, and the motor 1 411 is started to drive the drill bit 412 to rotate, move the inner tube 407 downward, drive the inner tube 407 and the outer tube 406 to slide, drive the limit column 2 410 to move downward, drive the spring 1 408 to be compressed, drive the collection cover 413 to abut against the transformer housing 7, and the inner tube 407 continues to move downward, drive the spring 2 414 to be compressed, and the drill bit 412 contacts the transformer housing 7. The drill bit 412 grooves the transformer housing 7. After the grooves are grooved to a preset depth, the inner tube 407 is rotated, and the inner tube 407 and the outer tube 406 rotate, driving the limit column 2 410 to get stuck in the limit groove 409, so that the inner tube 407 cannot descend or move upward. At this time, the inner tube 407 is moved horizontally, so that the inner tube 407 rotates around the center column 3, and the drill bit 412 grooves the transformer housing 7.

[0062] One end of the collecting pipe 417 is connected to the inner pipe 407, and the other end of the collecting pipe 417 is connected to the vacuum cleaner. When the motor 411 is started, the vacuum cleaner is started, and the debris generated by the isolation groove opened by the drill 412 enters the collecting cover 413 under the suction of the vacuum cleaner, and then enters the collecting chamber 416 through the through hole 415, and then enters the vacuum cleaner from the collecting pipe 417;

[0063] The beneficial effects of the above technical solution are as follows: the distance between the center column 3 and the inner tube 407 can be changed, so as to adapt to the different models and sizes of the transformer housing 7 for slotting; the distance of the slotting can be checked by pointing the pointer 404 to the position of the scale line 405; the limit column 410 can be inserted into the limit groove 409 at different positions, so as to change the depth of the slotting, and at the same time, after the limit column 410 is inserted into the limit groove 409, when the inner tube 407 rotates around the center column 3, the depth of the slotting of the drill bit 412 remains unchanged, so as to ensure the consistency of the depth of the magnetic isolation groove; the collection cover 413 is tightly attached to the transformer housing 7, and the debris is sucked away from the magnetic isolation groove to prevent the debris from being left in the magnetic isolation groove, affecting the subsequent filling of non-magnetic materials, and thus affecting the magnetic isolation effect.

[0064] Embodiment 7

[0065] like Figure 1-15 As shown, the packing component 5 includes a swivel 501, which rotates on the center column 3, and the swivel 501 is fixedly connected to the end of the outer rod 502. The inner rod 503 is slidably connected inside the outer rod 502. A pointer 504 is provided at one end of the inner rod 503, and the pointer 504 points to a scale line 511 on the outer rod 502. The other end of the inner rod 503 is fixed on the main tube 505. A hopper 506 is fixed on the upper end of the main tube 505, and a feed pipe 508 is slidably connected to the lower end of the main tube 505. The feed pipe 508 is fixedly connected to one end of the spring 507, and the other end of the spring 507 is fixed on the main tube 505. A blocking column 509 is provided in the feed pipe 508, and the blocking column 509 is plugged at the lower end of the main tube 505. A through hole 510 is provided at the connection between the feed pipe 508 and the blocking column 509.

[0066] The working principle of the above technical solution is: move the inner rod 503 so that the outer rod 502 and the inner rod 503 slide relative to each other, so that the position scale of the pointer 504 pointing to the scale line 511 is consistent with the position scale of the pointer 404 pointing to the scale line 405, so that the lower end of the feed tube 508 is located just above the magnetic isolation groove, and non-magnetic material is added from the hopper 506 to the main body tube 505. In the initial state, under the pulling force of the spring three 507, the blocking column 509 blocks the lower opening of the main body tube 505. When it is necessary to fill the non-magnetic material into the magnetic isolation groove, the feed tube 508 is pulled downward, with The dynamic spring three 507 is stretched, and the blocking column 509 is separated from the main tube 505. The non-magnetic material in the main tube 505 falls from the lower end of the main tube 505, and then falls into the discharge tube 508 from the through hole two 510, and then enters the magnetic isolation groove from the lower end of the discharge tube 508. The main tube 505 and the discharge tube 508 can rotate around the central column 3, and then fill the magnetic isolation groove with non-magnetic material. When it is filled, the downward pull restriction on the discharge tube 508 is released. Under the elastic force of the spring three 507, the discharge tube 508 is driven to move upward, and the blocking column 509 is re-inserted at the lower end of the main tube 505 to prevent the non-magnetic material from falling.

[0067] Embodiment 8

[0068] like Figure 1-15As shown, the vibration component 6 includes a shell 601, and long grooves 602 are provided at both ends of the shell 601. The limiting column 18 provided on the operating table 1 is inserted into the long groove 602. The limiting column 18 is threadedly connected with the nut 603. A motor 2 604 is fixed on the side of the shell 601. The output end of the motor 2 604 is connected to a bent rod 605. The bent rod 605 is rotatably connected to one end of a swing rod 606. The other end of the swing rod 606 is rotatably connected to one end of a moving rod 607. The other end of the moving rod 607 is fixedly connected to a sliding plate 1 608. The sliding plate 1 60 8 slides inside the percussion hammer 610, the two sides of the sliding plate 1 608 are respectively fixed to the ends of the two springs 4 609, the other ends of the two springs 4 609 are fixed inside the percussion hammer 610, a sliding plate 2 611 is fixed in the middle of the percussion hammer 610, the sliding plate 2 611 slides inside the outer tube 614, the two sides of the sliding plate 2 611 are respectively fixed to the ends of the two springs 5 ​​612, the other ends of the two springs 5 ​​612 are fixed inside the outer tube 614, the outer tube 614 is fixed in the housing 601, and a rubber block 613 is provided at the front end of the percussion hammer 610;

[0069] The working principle of the above technical solution is as follows: the starting motor 2 604 drives the bent rod 605 to rotate, drives the swing rod 606 to swing, drives the moving rod 607 to move back and forth, drives the sliding plate 1 608 to move back and forth inside the striking hammer 610, drives the striking hammer 610 to move back and forth through the two springs 4 609, and the striking hammer 610 moves back and forth in the outer tube 614 through the sliding plate 2 611. The two springs 5 ​​612 provide the striking hammer 610 with the power to reset. A rubber block 613 is provided at the front end of the striking hammer 610. The rubber block 613 is provided at the front end of the striking hammer 610. 13 strikes the transformer housing 7 reciprocatingly, so that the non-magnetic material in the magnetic isolation groove sinks and fills the gap between the non-magnetic materials in the magnetic isolation groove, preventing the generation of gaps in the magnetic isolation groove, thereby affecting the magnetic isolation effect. The long slot 602 can slide with the limit column 8, thereby changing the position of the housing 601 on the operating table 1, and then changing the distance between the knocking hammer 610 and the transformer housing 7, thereby adapting to transformer housings 7 of different sizes, so that the distance between the knocking hammer 610 and the transformer housing 7 is maintained within a preset range.

[0070] Embodiment 9

[0071] like Figure 1-15 As shown, a current transformer comprises a transformer housing 7 designed according to any one of the above-mentioned current transformer magnetic isolation design methods, the transformer housing 7 is filled with non-magnetic material, two transformer housings 7 are buckled with each other, and an iron core with a coil wound therein is encapsulated therein;

[0072] The working principle of the above technical solution is as follows: the current transformer includes two transformer housings 7 and an iron core wrapped with a coil. The two transformer housings 7 are buckled together to encapsulate the iron core wrapped with the coil. At the same time, the non-magnetic material in the magnetic isolation groove surrounds the outside of the iron core wrapped with the coil, which can effectively isolate the magnetic fields of the primary winding and the secondary winding inside the current transformer, reduce the magnetic interference inside the current transformer, and effectively isolate the magnetic interference of the external magnetic field on the current transformer, thereby improving the measurement accuracy of the current transformer.

[0073] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A method for designing magnetic isolation of a current transformer, characterized in that: The following steps are involved: S1. Fixing the transformer housing (7) on the operating table (1) by means of a fixing component (2), and marking the position and size of the magnetic isolation groove on the inner wall and the outer wall of the transformer housing (7); S2. According to the marked magnetic isolation groove position and size, use the slotting component (4) to respectively open magnetic isolation grooves on the inner wall and the outer wall of the transformer housing (7); S3, filling the non-magnetic material into the magnetic isolation groove through the filling component (5), attaching a sealing gasket to the upper opening of the magnetic isolation groove, and sealing the non-magnetic material in the magnetic isolation groove; The fixing component (2) is arranged on the operating table (1), the fixing component (2) fixes the transformer housing (7) on the operating table (1), the center column (3) is plugged into the fixing component (2), the ends of the slotted component (4) and the filler component (5) are both rotated on the center column (3), the slotted component (4) respectively opens magnetic isolation grooves on the inner wall and the outer wall of the transformer housing (7), the filler component (5) fills the magnetic isolation grooves with non-magnetic material, and the vibration component (6) is fixed on the operating table (1) to knock on one side of the transformer housing (7); The slotted component (4) comprises a rotating ring (401), the rotating ring (401) rotates on the central column (3), the rotating ring (401) is fixedly connected to the end of an outer rod (402), an inner rod (403) is slidably connected inside the outer rod (402), a pointer (404) is provided at one end of the inner rod (403), the pointer (404) points to a scale line (405) on the outer rod (402), and the other end of the inner rod (403) is fixedly connected to the outer tube (406); The outer tube (406) is slidably connected to the inner tube (407), the outer tube (406) is fixedly connected to one end of the spring (408), the other end of the spring (408) is fixed to the inner tube (407), a limiting groove (409) is provided on the outer tube (406), a limiting column (410) is fixed on the inner tube (407), and the limiting column (410) is clamped in the limiting groove (409); A motor 1 (411) is fixed inside the inner tube (407), the output end of the motor 1 (411) is connected to the drill bit (412), the inner tube (407) is slidably connected to the collecting cover (413), the collecting cover (413) is fixedly connected to one end of the spring 2 (414), the other end of the spring 2 (414) is fixedly connected to the inner tube (407), a through hole 1 (415) and a collecting chamber (416) are provided inside the inner tube (407), a collecting tube (417) is fixed to the side of the inner tube (407), the collecting chamber (416) is connected to the collecting tube (417), the outer rod 1 (402) is rotatably connected to the rotating rod (418), the rotating rod (418) is fixed at an eccentric position of the limiting plate (419), a rubber ring is provided outside the limiting plate (419), and the rotating rod (418) is rotated to drive the rubber ring outside the limiting plate (419) to be squeezed on the upper edge of the inner rod 1 (403); The packing component (5) comprises a second rotating ring (501), the second rotating ring (501) rotates on the central column (3), the second rotating ring (501) is fixedly connected to the end of the second outer rod (502), the second inner rod (503) is slidably connected inside the second outer rod (502), a second pointer (504) is provided at one end of the second inner rod (503), the second pointer (504) points to a second scale line (511) on the second outer rod (502), the other end of the second inner rod (503) is fixed to the main body tube (505), and the main body tube (505) is provided with a second pointer (504) at one end of the second inner rod (503). A hopper (506) is fixed to the upper end of the body tube (505), a feeding tube (508) is slidably connected to the lower end of the main body tube (505), the feeding tube (508) is fixedly connected to one end of a spring three (507), the other end of the spring three (507) is fixed to the main body tube (505), a blocking column (509) is provided in the feeding tube (508), the blocking column (509) is plugged into the lower end of the main body tube (505), and a through hole two (510) is provided at the connection between the feeding tube (508) and the blocking column (509).

2. A current transformer magnetic isolation design method according to claim 1, characterized in that: In step S2, the slotting component (4) respectively forms magnetic isolation grooves on the inner wall and the outer wall of the transformer housing (7), and at the same time, the slotting component (4) absorbs debris generated by the formation of the magnetic isolation grooves.

3. A current transformer magnetic isolation design method according to claim 1, characterized in that: In step S3, after the filler component (5) fills the magnetic isolation groove with non-magnetic material, the vibration component (6) drives the transformer housing (7) to vibrate, so that the non-magnetic material fills the gap in the magnetic isolation groove.

4. A current transformer magnetic isolation design method according to claim 1, characterized in that: The fixing component (2) comprises a support column (201), the support column (201) is fixed on the operating table (1), the support column (201) is slidably connected to a slider (204), the slider (204) is threadedly connected to a central screw (203), the operating table (1) and the support column (201) are both rotatably connected to the central screw (203), a knob (202) is fixed to the end of the central screw (203), the slider (204) is rotatably connected to one end of a connecting rod (205), the other end of the connecting rod (205) is rotatably connected to a support plate (206), the lower end of the support plate (206) is slidably connected to the operating table (1), the four support plates (206) fix the transformer housing (7) on the operating table (1), and the central column (3) is plugged into the support column (201).

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