A high-precision comprehensive test device and test method for current transformer

Abstract

The present invention discloses a high-precision comprehensive testing device and testing method for a current transformer, which belongs to the technical field of current transformers, wherein the high-precision comprehensive testing device for a current transformer comprises a base plate, a surface of one side of the mounting shell is provided with a plurality of evenly distributed wire grooves, a pressure plate is provided above the wire grooves, the pressure plate is rotatably installed on the upper surface of the mounting shell, and a wire pressing and fixing component is installed on the upper surface of the pressure plate. The present invention can drive the tooth plate to move along the groove of the supporting base through the limitation of the roller, and the annular plate can be moved into the mounting hole of the mounting plate, and a limiting slider is installed on both sides of the slide groove at one end of the annular plate, and a spring push rod is fixedly connected between the limiting sliders, which can support the limiting slider and move outward along the slide groove, so that the annular plate is fixed in the mounting hole, so that the upper winding block and the lower winding block are connected together, which can achieve the effect of automatic closing and fixing, and better fit the test current.

Description

Technical Field

[0001] The present invention belongs to the technical field of current transformers, and in particular relates to a high-precision comprehensive testing device and a testing method for a current transformer. Background Art

[0002] A current transformer is an instrument that converts a large primary current into a smaller secondary current for measurement based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the current to be measured. Therefore, the entire current of the circuit often flows through it, and the secondary winding has a relatively large number of turns. Application number: CN202121868678.3 discloses a test device for current transformers. This solves the technical problem that existing technologies cannot detect current transformers, resulting in errors and inaccurate test data during the test process of test instruments for capacitive devices. The utility model provides a testing device for a current transformer. A current acquisition device is connected to the current transformer and a transmission line. First current information of the current transformer and second current information of the transmission line are acquired through the current acquisition device. A current comparison device generates current difference information according to the first current information and the second current information. A prompt information generation device generates prompt information according to the current difference information and preset current information, and the prompt information is used to indicate whether the current transformer is qualified. In this way, whether the current transformer is qualified can be detected. This avoids the problem that errors in testing capacitive equipment and inaccurate test data may occur due to failure or abnormality of the current transformer during the test of the capacitive equipment.

[0003] The problems with the existing technology are: a current transformer is used in the current testing process, and the current transformer uses tools or manual labor to pass the wire through the hole and wrap it around the winding during the connection process. The existing current transformers are all integrally formed, resulting in low current testing performance. In addition, when the wire is wrapped around the winding during use, the elasticity of the wire shell will cause the wire to rebound and become loose, making it impossible to accurately wrap it around the winding, thereby reducing the accuracy of the test current. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a high-precision comprehensive testing device and testing method for current transformers that can overcome the above problems or at least partially solve the above problems.

[0005] The present invention is implemented in this way: a high-precision comprehensive test device for current transformers includes a bottom plate, a test receiver is fixedly connected to the lower surface of one side of the bottom plate, three evenly distributed base plates are fixedly connected above the same side surface of the bottom plate, each base plate is installed with a clamping plate and a side plate on the inner side through a clamping fixing assembly, each of the inner surfaces of the clamping plate and the side plate is fixedly connected with a clamping block, and a support base is provided inside each of the clamping plate and the side plate, and the two side surfaces of the support base are fixedly connected with connecting sheet metals, bolts are installed on the connecting sheet metals on both sides, and a connecting assembly component is installed inside the support base. A lower winding block is fixedly connected to the upper end of the base, and an upper winding block is installed on one side of the lower winding block through a rotating connecting piece. The other ends of the lower winding block and the upper winding block are fixedly connected to a mounting plate, and mounting holes are provided in the middle of the two mounting plates, and the mounting holes can be installed in conjunction with the connection assembly components. The upper surface of the upper winding block is fixedly connected to a mounting shell, and a connecting terminal is installed on one side of the upper surface of the mounting shell. A plurality of evenly distributed wire grooves are provided on one side surface of the mounting shell, and a pressure plate is provided above the wire groove. The pressure plate is rotatably installed on the upper surface of the mounting shell, and a wire pressing and fixing component is installed on the upper surface of the pressure plate.

[0006] As a preferred embodiment of the present invention, the clamping and fixing assembly includes a No. 1 drive motor, the No. 1 drive motor is fixedly connected to the inner wall of the base plate, the output shaft of the No. 1 drive motor is fixedly connected to a No. 1 screw rod, and the No. 1 screw rod is connected to a threaded matching sleeve through surface thread engagement.

[0007] As a preferred embodiment of the present invention, the threaded fitting sleeve is arranged in the middle part of the cross-shaped lifting plate, and a rotating mounting part is rotatably installed on the outer side of the cross-shaped lifting plate. Each of the rotating mounting parts is rotatably installed on one end of the limit rod through a connecting rod, and each of the limit rods is movable through the outer side of the base plate and is fixedly connected to the splint and the side plate respectively.

[0008] As a preferred embodiment of the present invention, the connection assembly component includes a No. 2 drive motor, which is fixedly connected to one side of the inner wall of the support base. The output shaft of the No. 2 drive motor is fixedly connected to a drive worm, and a transmission worm gear is connected to the top of the drive worm by threaded engagement. Each of the transmission worm gears is fixedly sleeved on the surface of the transmission shaft, and the transmission shaft is rotatably installed between the inner walls of the support base.

[0009] As a preferred embodiment of the present invention, both ends of the transmission shaft on both sides are also fixedly provided with a transmission gear, the upper parts of the transmission gears on both sides are connected to the tooth plate by meshing with teeth, the tooth plate is fixedly connected to the lower surface of the annular plate, the annular plate is movably installed under the support base, rollers are provided on both sides below the tooth plate, each of the rollers is rotatably installed on the inner wall of the support base, a slide groove is provided at one end of the annular plate, and limit sliders are movably installed on both sides of the slide groove, and a spring top rod is fixedly connected between the limit sliders on both sides.

[0010] As a preferred embodiment of the present invention, the wire compression and fixing assembly includes a No. 1 mounting rod, which is fixedly connected to one side of the upper end of the mounting shell, and an electric push rod is rotatably installed on the No. 1 mounting rod, and a No. 2 mounting rod is rotatably installed on the output shaft of the electric push rod, and the No. 2 mounting rod is fixedly connected to one end of the protective shell, and the protective shell is fixedly connected to the upper surface of the pressure plate.

[0011] As a preferred embodiment of the present invention, grooves are provided on both sides of the mounting shell, and rotating shafts are rotatably installed in the grooves on both sides. The rotating shafts are installed on the upper surface of the pressure plate through bearings. Rings are provided on both ends of the rotating shafts on both sides. One side of the ring is fixedly connected to a connecting rod, and both ends of the connecting rod extend out of the outside of the groove. One end of the connecting rod on both sides is fixedly connected to a pressure rod.

[0012] As a preferred embodiment of the present invention, the other end of the rotating shaft on both sides is fixedly connected to a bevel gear, and the other bevel gear is fixedly sleeved on the upper end of the rotating rod. The bevel gears on both sides are connected together by meshing of teeth and the meshing directions of the two bevel gears are opposite. Sprockets are fixedly sleeved on the rotating rods on both sides and the output shaft of the No. 3 drive motor, and a chain is installed on each sprocket for transmission.

[0013] As a preferred embodiment of the present invention, a testing method for a current transformer high-precision comprehensive testing device comprises the following steps:

[0014] S1. First, install the current transformer on the base plate using the clamping assembly according to the needs of the wire. Then, rotate the upper and lower winding blocks around the rotating mounting parts to make it easier to wind the wire around the wire slot of the upper winding block.

[0015] S2. When the wire is wound on the upper winding block, the wire pressing and fixing assembly is activated to press and fix the wire in the wire trough to prevent the wire from becoming loose and causing poor contact.

[0016] S3. Finally, the upper winding block and the lower winding block can be connected together by connecting the assembly components, so as to achieve the effect of fixing the upper winding block and the lower winding block and also can be adjusted according to the width of the wire.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The transmission gear of the present invention is connected with the transmission gear of the present invention on the line, and the transmission gear of the present invention is connected with the transmission gear of the line.

[0019] 2. In the present invention, since the No. 2 mounting rod is fixedly connected to the protective shell, and the protective shell is fixedly connected to the pressure plate and rotates around the rotation point, the pressure plate presses the wire on the wire trough, thereby achieving the effect of preliminarily fixing the wire. Subsequently, the No. 3 driving motor is started to drive the rotating rods on both sides to rotate through the sprocket and chain transmission. Since the upper end of the rotating rod drives the rotating shaft to rotate through the bevel gear, the bevel gears on both sides are set in opposite directions, which can drive the rotating shafts on both sides to rotate in opposite directions. One end of the rotating shaft is fixedly connected to the pressure rod through the connecting rod, which can fix and press the two sides of the wire, preventing the wire from becoming loose during the test and improving the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic three-dimensional diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic three-dimensional diagram of the overall structure of a current transformer provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic three-dimensional diagram of the structure of a clamping and fixing assembly provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic three-dimensional diagram of the structure of the connection assembly component provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic three-dimensional diagram of the detailed structure of the annular plate provided in an embodiment of the present invention;

[0025] Figure 6 is a schematic three-dimensional diagram of the structure of a clamping and fixing assembly provided by an embodiment of the present invention;

[0026] Figure 7The embodiment of the present invention provides Figure 6 The enlarged structural diagram at point a is shown in the figure.

[0027] In the figure: 1. bottom plate; 2. test receiver; 3. base plate; 4. clamping and fixing assembly; 5. clamping block; 6. clamping plate; 7. side plate; 8. connecting sheet metal; 9. bolt; 10. supporting base; 11. lower winding block; 12. upper winding block; 13. rotating connector; 14. mounting plate; 15. mounting hole; 16. connecting assembly assembly; 17. mounting shell; 18. connecting terminal; 19. wire trough; 20. wire clamping and fixing assembly; 21. pressing plate; 401. No. 1 driving motor; 402. No. 1 lead screw; 403. threaded matching sleeve; 404. cross-shaped lifting plate; 405. connecting rod; 406. rotating mounting piece; 407. Limit rod; 601, No. 2 driving motor; 602, driving worm; 603, driving worm wheel; 604, driving shaft; 605, driving gear; 606, tooth plate; 607, annular plate; 608, slide groove; 609, roller; 610, spring push rod; 611, limit slider; 201, No. 1 mounting rod; 202, electric push rod; 203, No. 2 mounting rod; 204, groove; 205, rotating shaft; 206, bearing; 207, collar; 208, connecting rod; 209, pressure rod; 210, protective shell; 211, bevel gear; 212, rotating rod; 213, sprocket; 214, chain; 215, No. 3 driving motor. DETAILED DESCRIPTION

[0028] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0029] The structure of the present invention is described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 7As shown, an embodiment of the present invention provides a high-precision comprehensive test device for current transformers, comprising a bottom plate 1, a test receiver 2 being fixedly connected to the lower surface of one side of the bottom plate 1, three evenly distributed base plates 3 being fixedly connected to the upper surface of the same side of the bottom plate 1, a clamping plate 6 and a side plate 7 being installed on the inner side of each base plate 3 through a clamping fixing assembly 4, a clamping block 5 being fixedly connected to the inner surface of each clamping plate 6 and side plate 7, a support base 10 being provided inside each clamping plate 6 and side plate 7, and a support base 10 having two side surfaces. The connecting sheet metal 8 is fixedly connected, and bolts 9 are installed on the connecting sheet metals 8 on both sides. A connecting assembly component 16 is installed inside the support base 10. The upper end of the support base 10 is fixedly connected to the lower winding block 11. The upper winding block 12 is installed on one side of the lower winding block 11 by rotating the connecting piece 13. The other ends of the lower winding block 11 and the upper winding block 12 are fixedly connected to the mounting plate 14. The middle part of the two mounting plates 14 is provided with a mounting hole 15. The mounting hole 15 can be installed in conjunction with the connecting assembly component 16. The upper surface of the upper winding block 12 The surface is fixedly connected to the mounting shell 17, and a connecting terminal 18 is installed on one side of the upper surface of the mounting shell 17. A number of evenly distributed wire grooves 19 are provided on one side surface of the mounting shell 17. A pressure plate 21 is provided above the wire groove 19, and the pressure plate 21 is rotatably installed on the upper surface of the mounting shell 17. A wire clamping and fixing component 20 is installed on the upper surface of the pressure plate 21. First, the current transformer is installed on the base plate 3 through the clamping and fixing component 4 according to the needs of the wire, and then the upper winding block 12 and the lower winding block 11 are rotated with the rotating mounting part 406 as the center, which makes it easier to wind the wire around the wire groove 19 of the upper winding block 12. When the wire is wound around the upper winding block 12, the wire clamping and fixing component 20 is started to clamp and fix the wire in the wire groove 19 to prevent the wire from loosening and causing poor contact. Finally, the upper winding block 12 and the lower winding block 11 can be connected together through the connecting assembly component 16 to achieve the effect of fixing the upper winding block 12 and the lower winding block 11, and it can also be adjusted according to the width of the wire.

[0031] The clamping and fixing assembly 4 includes a No. 1 drive motor 401, which is fixedly connected to the inner wall of the base plate 3. The output shaft of the No. 1 drive motor 401 is fixedly connected to the No. 1 screw rod 402, and the No. 1 screw rod 402 is connected to a threaded matching sleeve 403 through a threaded engagement on the surface. The threaded matching sleeve 403 is arranged in the middle of the cross-shaped lifting plate 404, and a rotating mounting part 406 is rotatably installed on the outer side of the cross-shaped lifting plate 404. Each rotating mounting part 406 is rotatably installed on one end of a limiting rod 407 through a connecting rod 405. Each limiting rod 407 is movable through the outer side of the base plate 3 and is fixedly connected to the splint 6 and the side plate 7 respectively. Drive the No. 1 screw rod 402 to rotate. Since the No. 1 screw rod 402 is connected to the threaded matching sleeve 403 through threaded engagement, the threaded matching sleeve 403 is arranged in the middle of the cross-shaped lifting plate 404, and one end of the cross-shaped lifting plate 404 is connected to the limit rod 407 through the connecting rod 405 and the rotating mounting part 406, it can play the role of transmission pulling, and at the same time drive the four limit rods 407 to move inward, which also drives the splint 6 and the side plate 7 to move inward to fix and clamp the current transformer. Disassembly can facilitate the installation of wires during testing and the replacement of current transformers, thereby improving the practical value of the current transformer.

[0032] The connecting assembly component 16 includes a No. 2 drive motor 601, which is fixedly connected to one side of the inner wall of the support base 10. The output shaft of the No. 2 drive motor 601 is fixedly connected to a drive worm 602. A transmission worm gear 603 is connected to the upper side of the drive worm 602 through a threaded engagement. Each transmission worm gear 603 is fixedly sleeved on the surface of a transmission shaft 604. The transmission shaft 604 is rotatably installed between the inner walls of the support base 10. The two ends of the transmission shafts 604 on both sides are also fixedly sleeved with transmission gears 605. The transmission gears 605 on both sides are fixedly sleeved. 5 is connected to the tooth plate 606 through the engagement of the teeth, and the tooth plate 606 is fixedly connected to the lower surface of the annular plate 607. The annular plate 607 is movably installed under the support base 10. Rollers 609 are provided on both sides of the lower side of the tooth plate 606. Each roller 609 is rotatably installed on the inner wall of the support base 10. A slide groove 608 is provided at one end of the annular plate 607. Limiting sliders 611 are movably installed on both sides of the slide groove 608. A spring top rod 610 is fixedly connected between the limiting sliders 611 on both sides. The upper winding block 12 and the lower winding block 11 are rotated to rotate. The mounting member 406 rotates as the center, making it easier to wind the wire around the wire groove 19 of the upper winding block 12. After the wire is installed, the second drive motor 601 is started to drive the drive worm 602 to rotate. Since the drive worm 602 is connected to the transmission worm wheel 603 by threaded engagement, the transmission worm wheel 603 and the transmission gear 605 are both sleeved on the transmission shaft 604, and the transmission gear 605 is connected to the tooth plate 606 of the annular plate 607 by tooth engagement, the tooth plate 606 can be driven along the support by the limit of the roller 609. The annular plate 607 moves in the groove of the base 10, and the annular plate 607 can be moved into the mounting hole 15 of the mounting plate 14. A limiting slider 611 is installed on both sides of the slide groove 608 at one end of the annular plate 607. A spring push rod 610 is fixedly connected between the limiting sliders 611, which can support the limiting slider 611 and move outward along the slide groove 608, so that the annular plate 607 is fixed in the mounting hole 15, so that the upper winding block 12 and the lower winding block 11 are connected together, which can achieve the effect of automatic closing and fixing, and better fit the test current.

[0033] The wire pressing and fixing assembly 20 includes a No. 1 mounting rod 201, which is fixedly connected to one side of the upper end of the mounting housing 17. An electric push rod 202 is rotatably mounted on the No. 1 mounting rod 201, and a No. 2 mounting rod 203 is rotatably mounted on the output shaft of the electric push rod 202. The No. 2 mounting rod 203 is fixedly connected to one end of the protective housing 210, and the protective housing 210 is fixedly connected to the upper surface of the pressure plate 21. Grooves 204 are provided on both sides of the mounting housing 17, and rotating shafts 205 are rotatably mounted in the grooves 204 on both sides. The shaft 205 is mounted on the upper surface of the pressure plate 21 through the bearing 206. The two ends of the rotating shafts 206 on both sides are fixed with collars 207. One side of the collar 207 is fixedly connected to a connecting rod 208. The two ends of the connecting rod 208 extend out of the outside of the groove 204. One end of the connecting rod 208 on both sides is fixedly connected to a pressure rod 209. The other end of the rotating shafts 205 on both sides is fixedly connected to a bevel gear 211. Another bevel gear 211 is fixedly sleeved on the upper end of the rotating rod 212. The bevel gears 211 on both sides are connected together by meshing with the teeth and the two bevel gears are connected together. The meshing directions of the wheels 211 are opposite, and sprockets 213 are fixedly sleeved on the output shafts of the rotating rods 212 on both sides and the No. 3 driving motor 215. A chain 214 is installed on each sprocket 213 for transmission. When the wire is wound on the wire groove 19, the electric push rod 202 is first started. Since the No. 2 mounting rod 203 is fixedly connected to the protective shell 210, the protective shell 210 is fixedly connected to the pressure plate 21 and rotates around the rotation point, the pressure plate 21 presses the wire on the wire groove 19, thereby achieving a preliminary fixation of the wire. The third drive motor 215 is then started to drive the rotating rods 212 on both sides to rotate through the sprocket 213 and the chain 214. Since the upper end of the rotating rod 212 drives the rotating shaft 205 to rotate through the bevel gear 211, the bevel gears 211 on both sides are set in opposite directions, which can drive the rotating shafts 205 on both sides to rotate in opposite directions. One end of the rotating shaft 205 is fixedly connected to the pressure rod 209 through the connecting rod 208, which can fix and tighten the two sides of the wire to prevent the wire from becoming loose during the test and improve the stability of the test.

[0034] refer to Figures 1 to 7 A method for testing a high-precision comprehensive test device for a current transformer, the method comprising the following steps:

[0035] S1. First, install the current transformer on the base plate 3 using the clamping and fixing assembly 4 according to the needs of the wire. Then, rotate the upper winding block 12 and the lower winding block 11 around the rotating mounting member 406 to facilitate winding the wire on the wire slot 19 of the upper winding block 12.

[0036] S2. When the wire is wound on the upper winding block 12, the wire pressing and fixing assembly 20 is activated to press and fix the wire in the wire slot 19 to prevent the wire from becoming loose and causing poor contact.

[0037] S3. Finally, the upper winding block 12 and the lower winding block 11 can be connected together by connecting the assembly component 16, so as to achieve the effect of fixing the upper winding block 12 and the lower winding block 11 and also adjust the width of the wire.

[0038] Working principle of the present invention:

[0039] When in use, first install the current transformer on the base plate 3 through the clamping and fixing component 4 according to the needs of the wire, and then rotate the upper winding block 12 and the lower winding block 11 with the rotating mounting part 406 as the center, which makes it easier to wind the wire around the wire groove 19 of the upper winding block 12. When the wire is wound around the upper winding block 12, start the wire clamping and fixing component 20 to clamp and fix the wire in the wire groove 19 to prevent the wire from loosening and causing poor contact. Finally, the upper winding block 12 and the lower winding block 11 can be connected together through the connecting assembly component 16 to achieve the effect of fixing the upper winding block 12 and the lower winding block 11, and can also be adjusted according to the width of the wire.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision comprehensive test device for a current transformer, comprising a base plate (1), characterized in that: A test receiver (2) is fixedly connected below one side surface of the bottom plate (1), and three evenly distributed base plates (3) are fixedly connected above the same side surface of the bottom plate (1). A clamping plate (6) and a side plate (7) are installed on the inner side of each base plate (3) through a clamping fixing assembly (4). A clamping block (5) is fixedly connected to the inner surface of each clamping plate (6) and side plate (7). A support base (10) is provided inside each clamping plate (6) and side plate (7). Connecting sheet metals (8) are fixedly connected to the two side surfaces of the support base (10). Bolts (9) are installed on the connecting sheet metals (8) on both sides. A connecting assembly assembly (16) is installed inside the support base (10). A lower winding block (11) is fixedly connected to the upper end of the support base (10). The lower winding block (11) An upper winding block (12) is mounted on one side via a rotating connector (13), and the other ends of the lower winding block (11) and the upper winding block (12) are fixedly connected to a mounting plate (14), and a mounting hole (15) is provided in the middle of the two mounting plates (14), and the mounting hole (15) can be mounted in conjunction with a connection assembly component (16). The upper surface of the upper winding block (12) is fixedly connected to a mounting shell (17), and a connection terminal (18) is mounted on one side of the upper surface of the mounting shell (17). A plurality of evenly distributed wire grooves (19) are provided on one side of the surface of the mounting shell (17), and a pressure plate (21) is provided above the wire groove (19), and the pressure plate (21) is rotatably mounted on the upper surface of the mounting shell (17), and a wire pressing and fixing component (20) is mounted on the upper surface of the pressure plate (21); The wire pressing and fixing assembly (20) includes a No. 1 mounting rod (201), the No. 1 mounting rod (201) is fixedly connected to one side of the upper end of the mounting housing (17), an electric push rod (202) is rotatably mounted on the No. 1 mounting rod (201), an output shaft of the electric push rod (202) is rotatably mounted with a No. 2 mounting rod (203), the No. 2 mounting rod (203) is fixedly connected to one end of the protective housing (210), and the protective housing (210) is fixedly connected to the upper surface of the pressure plate (21); Grooves (204) are provided on both sides of the mounting housing (17), and rotating shafts (205) are rotatably installed in the grooves (204) on both sides. The rotating shafts (205) are installed on the upper surface of the pressure plate (21) through bearings (206). Rings (207) are fixedly provided at both ends of the rotating shafts (205) on both sides. A connecting rod (208) is fixedly connected to one side of the ring (207). Both ends of the connecting rod (208) extend outward from the grooves (204), and one end of the connecting rod (208) on both sides is fixedly connected to a pressure rod (209). The other ends of the rotating shafts (205) on both sides are fixedly connected to bevel gears (211), and the other bevel gear (211) is fixedly sleeved on the upper end of the rotating rod (212). The bevel gears (211) on both sides are connected together by engaging with the teeth, and the engaging directions of the two bevel gears (211) are opposite. Sprockets (213) are fixedly sleeved on the output shafts of the rotating rods (212) on both sides and the third drive motor (215), and a chain (214) is installed on each sprocket (213).

2. A high-precision comprehensive test device for current transformers according to claim 1, characterized in that: The clamping and fixing assembly (4) comprises a No. 1 drive motor (401), the No. 1 drive motor (401) being fixedly connected to the inner wall of the base plate (3), the No. 1 drive motor (401) having an output shaft fixedly connected to a No. 1 screw rod (402), the No. 1 screw rod (402) being connected to a threaded matching sleeve (403) via surface thread engagement.

3. A high-precision comprehensive test device for current transformers according to claim 2, characterized in that: The threaded fitting sleeve (403) is arranged in the middle of the cross-shaped lifting plate (404), and a rotating mounting member (406) is rotatably mounted on the outer side of the cross-shaped lifting plate (404). Each of the rotating mounting members (406) is rotatably mounted on one end of a limiting rod (407) through a connecting rod (405). Each of the limiting rods (407) is movable and passes through the outer side of the base plate (3) and is fixedly connected to the splint (6) and the side plate (7), respectively.

4. A high-precision comprehensive test device for current transformers according to claim 3, characterized in that: The connection assembly component (16) includes a No. 2 drive motor (601), the No. 2 drive motor (601) is fixedly connected to one side of the inner wall of the support base (10), the output shaft of the No. 2 drive motor (601) is fixedly connected to a drive worm (602), and the upper part of the drive worm (602) is connected to a transmission worm gear (603) through threaded engagement, each of the transmission worm gears (603) is fixedly sleeved on the surface of a transmission shaft (604), and the transmission shaft (604) is rotatably installed between the inner walls of the support base (10).

5. A high-precision comprehensive test device for current transformers according to claim 4, characterized in that: The two ends of the transmission shaft (604) on both sides are also fixedly sleeved with transmission gears (605), and the upper parts of the transmission gears (605) on both sides are connected to the tooth plate (606) through tooth engagement, and the tooth plate (606) is fixedly connected to the lower surface of the annular plate (607), and the annular plate (607) is movably installed below the support base (10). Rollers (609) are provided on both sides below the tooth plate (606), and each roller (609) is rotatably installed on the inner wall of the support base (10). A slide groove (608) is provided at one end of the annular plate (607), and a limiting slider (611) is movably installed on both sides of the slide groove (608), and a spring top rod (610) is fixedly connected between the limiting sliders (611) on both sides.

6. A testing method for a current transformer high-precision comprehensive testing device according to claim 3, characterized in that: The testing method includes the following steps: S1. First, the current transformer is mounted on the base plate (3) through the clamping and fixing assembly (4) according to the needs of the wire, and then the upper winding block (12) and the lower winding block (11) are rotated around the rotating mounting member (406) to facilitate winding the wire on the wire groove (19) of the upper winding block (12); S2. When the wire is wound on the upper winding block (12), the wire pressing and fixing assembly (20) is activated to press and fix the wire in the wire slot (19) to prevent the wire from becoming loose and causing poor contact; S3. Finally, the upper winding block (12) and the lower winding block (11) can be connected together by connecting the assembly component (16), thereby achieving a fixing effect between the upper winding block (12) and the lower winding block (11).

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