A transformer coil turn measurement tool

Abstract

The application discloses a transformer coil turn number measuring tool, which comprises an operation table, two iron core base columns capable of forming a magnetic field are vertically arranged on the operation table, the contraction component further comprises an expansion component arranged on the outer wall of the second supporting column and used for enabling the first arc plate and the second arc plate to move towards the side close to or away from the second supporting column, when the first arc plate and the second arc plate move towards the side close to the second supporting column, the contraction component can be accommodated in the accommodating hole; when the first arc plate and the second arc plate move towards the side away from the second supporting column, the expansion component can drive the two sides of the two first arc plates and the two sides of the two second arc plates to be close to each other, and an extension ring plate with the same outer diameter and inner diameter as the iron core base column is formed. Through the mutual cooperation between the above structures, the length of the iron core base column can be adjusted, so that the iron core base column can measure transformer coils with different sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of coil turns measurement, and in particular to a transformer coil turns measurement tool. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are coils and iron cores. In medium and large transformers, the coils are mainly made of paper-wrapped flat wire or transposed wire. When winding the coils of transformers, horizontal winding machines and vertical winding machines are mainly used to wind the coils. There are generally two ways to wind the coils. One is the straight pancake winding method, which is usually simpler.

[0003] The other is the reverse pancake winding method. When doing the reverse pancake winding, you need to first use electromagnetic wire to wind an electromagnetic coil (temporary pancake) on the auxiliary tooling, and then use the machine tool to rotate the electromagnetic wire in the electromagnetic coil and a preset number of pads and shielding wires to wind them onto the reverse pancake coil to complete the reverse pancake winding.

[0004] The number of turns of transformer coil is one of the most important indicators affecting the performance of transformer and is the key to whether the transformer output voltage is accurate.

[0005] The magnetic circuit is formed on the iron core column of the measuring instrument, and then the upper clamp is installed. Then, a ratio bridge is used to measure and compare, so as to determine whether the number of turns of the coil is correct.

[0006] Because the length of the core column of the existing transformer coil turns measuring instrument cannot be adjusted, the inability to adjust the length of the core column will make it impossible to form a magnetic circuit when the core column is shorter than the height of the transformer coil, and therefore it is impossible to measure the transformer coil. Therefore, it is urgent to make a transformer coil turns measuring tool that can adjust the length of the core column to measure the turns of transformer coils of different sizes. Summary of the Invention

[0007] The main purpose of the present invention is to provide a transformer coil turns measuring tool, which aims to solve the technical problem that the length of the existing iron core column cannot be adjusted and the turns of transformer coils of different sizes cannot be measured.

[0008] To achieve the above-mentioned object, the transformer coil turns measuring tool proposed in the present invention includes an operating table, two iron core base columns capable of forming a magnetic field are vertically provided on the operating table, a receiving hole is formed in a depression on the side of each iron core base column facing away from the operating table, an iron core extension component is accommodated in the receiving hole, the iron core extension component includes a first support column vertically arranged on the bottom surface of the receiving hole, a second support column is slidably provided on the outer wall of one end of the first support column facing away from the bottom of the receiving hole, a plurality of contraction components are arranged around the outer wall of the second support column, the plurality of contraction components are distributed along the extension direction of the second support column, the contraction component includes two first arc plates symmetrically arranged on both sides of the outer wall of the second support column, and two second arc plates symmetrically arranged on the other two sides of the outer wall of the second support column, the first arc plates and the second arc plates are staggered;

[0009] The contraction component also includes an expansion component arranged on the outer wall of the second support column for enabling the first arc plate and the second arc plate to move toward or away from the side of the second support column. When the first arc plate and the second arc plate both move toward the side close to the second support column, the contraction component can be accommodated in the accommodation hole; when the first arc plate and the second arc plate both move toward the side away from the second support column, the expansion component can drive the two sides of the two first arc plates and the two sides of the two second arc plates to approach each other, and form an extended ring plate whose outer diameter and inner diameter are equal to the outer diameter and inner diameter of the iron core base column.

[0010] Preferably, the expansion component includes a first driving component arranged on the side of each first arc plate close to the second support column, and a second driving component arranged on the side of each second arc plate close to the second support column, the first driving component is used to drive the first arc plate to move toward the side away from the second support column, and the second driving component is used to drive the second arc plate to move toward the side away from the second support column, and the expansion component also includes a third driving component connecting the first driving component and the second driving component; the third driving component is used to make the first driving component and the second driving component drive in conjunction when the first arc plate moves toward the side close to the second support column, and drive the second arc plate toward the side close to the second support column through the second driving component.

[0011] Preferably, the first driving assembly includes a first movable block arranged on a side of the first arc plate close to the second supporting column, a second movable block is provided on a side of the second supporting column close to the first arc plate, two first connecting rods are rotatably provided on the first movable block, and the ends of the two first connecting rods facing away from the first movable block are rotatably connected to the second connecting rod through a rotating shaft, and the ends of each second connecting rod facing away from the first connecting rod are rotatably connected to the second movable block, and the rotation direction of each first connecting rod and each second connecting rod is toward the side close to or away from the second arc plate, and the first movable block and the second movable block are connected by a first elastic component.

[0012] Preferably, the second driving assembly includes two sets of rods horizontally arranged on the side of the second support column close to the second arc plate, and the ends of the two sets of rods facing away from the second support plate are recessed to form a sliding hole, and the extension direction of the sliding hole is perpendicular to the extension direction of the second support column. A push rod is slidably provided in each of the sliding holes, and a second elastic component is provided at the end of each push rod close to the rod, and the end of each push rod facing away from the rod is connected to the side of the second slide plate close to the second support column.

[0013] Preferably, the outer wall of each sleeve rod is formed with a through slot connected to the slide hole, the extension direction of the through slot is the same as the extension direction of the slide hole, the third driving component includes a slider slidably arranged in each through slot, one end of the slider extends out of the outer wall of the sleeve rod, and the other end extends into the slide hole and is connected to the push rod, and a cable is provided on the end of each slider extending out of the outer wall of the sleeve rod;

[0014] The cables on any one of the push rods of the two symmetrically arranged second driving components are connected to the two rotating shafts of an adjacent first driving component in a one-to-one correspondence, and the two cables are in a cross shape;

[0015] The cables on the other push rods of the two symmetrically arranged second driving components are connected to the two rotating shafts of the other adjacent first driving component in a one-to-one correspondence, and the two cables are in a cross shape.

[0016] Preferably, a direction limiting component for limiting the moving direction of the first arc plate is provided on a side of each of the first arc plates close to the second support column.

[0017] Preferably, the direction-limiting assembly includes a first direction-limiting rod laterally arranged on a side of the first arc plate close to the second support column, an end of the first direction-limiting rod facing away from the first arc plate is recessed to form a direction-limiting hole, an extension direction of the direction-limiting hole is perpendicular to an extension direction of the second support column, a second direction-limiting rod is slidingly arranged in the direction-limiting hole, an end of the second direction-limiting rod facing away from the first direction-limiting rod is connected to an outer wall of the second support column, and limit blocks are symmetrically provided on both sides of an end of the second direction-limiting rod facing away from the second support column, a limit groove is recessed in the direction-limiting hole to form a limit groove for sliding the limit block, and the extension direction of the limit groove is in the same direction as the extension direction of the direction-limiting hole;

[0018] When the side of the limiting block away from the bottom of the limiting hole collides with the side of the limiting groove away from the bottom of the limiting hole, the outer wall of the first arc plate is exactly on the same vertical plane as the outer wall of the core base column.

[0019] Preferably, the interval between two adjacent contraction parts is between 0.2mm and 0.5mm, so that the interval between two adjacent extension ring plates is between 0.2mm and 0.5mm, and the contraction parts can slide along the length direction of the second support column on the outer wall of the second support column, and the sliding range of each contraction part is within ±0.6mm.

[0020] Preferably, the end of the first support column close to the second support column is provided with a pulling component for driving the second support column to move toward a side close to the first support column.

[0021] In the technical solution of the present invention, based on the structure of the iron core column generating a magnetic circuit in the prior art, a connecting block is rotatably provided at one end of each second support column away from the first support column, wherein an iron core cross bar is transversely connected to any of the connecting blocks. When in use, the transformer coil is sleeved on the outer wall where the iron core cross bar is not provided, and then the connecting block provided with the iron core cross bar is rotated so that the end of the iron core cross bar away from the connecting block contacts the other connecting block, so that the two iron core columns cooperate to form a magnetic circuit;

[0022] When the height of the transformer coil to be measured is longer than the height of the core base column, the connecting block is pulled toward the side away from the receiving hole, so that the shrinkage component accommodated in the receiving hole extends out of the receiving hole. After a shrinkage component is completely located outside the receiving hole, the two first arc plates and the two second arc plates of the shrinkage component move toward the side close to and away from the second support plate under the drive of the expansion component, and the two first arc plates and the second arc plates are surrounded by each other to form an extended ring plate, one end of the extended ring plate is in contact with the end of the core base column away from the operating table, and the other end is in contact with the side of the connecting block close to the second support column; according to the required length of the core base column, a corresponding number of shrinkage components are selected to be pulled out, and after the multiple shrinkage components extend out of the receiving hole, the multiple extension ring plates formed by the multiple shrinkage components are in one-to-one contact with each other on the sides close to each other;

[0023] Through the cooperation between the above structures, the length of the core base column can be adjusted so that the core base column can measure transformer coils of different sizes;

[0024] At the same time, the outer diameter of the extended part is the same as the outer diameter of the core base. Since the thickness of the core base is closely related to the generated magnetic field, if the thickness is inconsistent, the magnetic field generated by the core base will be inconsistent, thereby affecting the accuracy of the measurement of the number of turns of the transformer coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without any creative effort.

[0026] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0027] Figure 2 Fig. 2 is a schematic diagram of the cross-sectional structure of the iron core base column and the iron core extension component in the accommodating hole of the present application;

[0028] Figure 3 Fig. 3 is a schematic diagram of the structure of the first arc plate and the second arc plate in the iron core extension component of the present application spliced to form an extension ring plate;

[0029] Figure 4 Fig. 4 is a schematic diagram of the structure of the first arc plate and the second arc plate in the iron core extension component of the present application retracted in the accommodating hole;

[0030] Figure 5 Fig. 5 is a schematic diagram of the second belt driving assembly of the present application.

[0031] Explanation of the reference numerals:

[0032] 1, operation table; 2, iron core base column; 2a, accommodating hole; 3, iron core extension component; 31, first support column; 31a, sliding groove; 32, second support column; 33, protruding block; 34, retracting component; 341, first arc plate; 342, second arc plate; 343, expanding component; 344, first belt driving assembly; 3441, first connecting rod; 3442, second connecting rod; 3443, first movable block; 3444, second movable block; 3445, first elastic component; 345, second belt driving assembly; 3451, sleeve rod; 3451a, sliding hole; 3451b, through groove; 3452, push rod; 3453, second elastic component; 346, third belt driving assembly; 3461, sliding block; 3462, cable; 35, pulling component; 36, connecting block; 37, iron core cross rod.

[0033] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0037] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a transformer coil turns measurement tool.

[0040] Please refer to Figures 1 to 5The transformer coil turn measurement tool, including operation platform 1, two iron core base columns 2 capable of forming a magnetic field are vertically arranged on the operation platform 1, a receiving hole 2a is recessed on the side of each iron core base column 2 away from the operation platform 1, an iron core extension component 3 is received in the receiving hole 2a, the iron core extension component 3 includes a first support column 31 vertically arranged on the bottom surface of the receiving hole 2a, a second support column 32 is slidingly arranged on the outer wall of the end of the first support column 31 away from the hole bottom of the receiving hole 2a, a plurality of contraction components 34 are arranged around the outer wall of the second support column 32, the plurality of contraction components 34 are distributed along the extension direction of the second support column 32, the contraction component 34 includes two first arc plates 341 symmetrically arranged on the two sides of the outer wall of the second support column 32 and two second arc plates 342 symmetrically arranged on the other two sides of the outer wall of the second support column 32, the first arc plates 341 and the second arc plates 342 are staggered distributed;

[0041] The contraction component 34 further includes an expansion component 343 arranged on the outer wall of the second support column 32 for enabling the first arc plates 341 and the second arc plates 342 to move towards or away from the side of the second support column 32, when the first arc plates 341 and the second arc plates 342 move towards the side of the second support column 32, the contraction component 34 can be received in the receiving hole 2a, and when the first arc plates 341 and the second arc plates 342 move away from the side of the second support column 32, the expansion component 343 can drive the two sides of the two first arc plates 341 and the two sides of the two second arc plates 342 to move close to each other, and form an extension ring plate with the outer diameter and the inner diameter equal to the outer diameter and the inner diameter of the iron core base column 2.

[0042] In the technical scheme of the present application, based on the structure of the magnetic circuit generated by the iron core column in the prior art, a connecting block 36 is rotatably arranged on the end of each second support column 32 away from the first support column 31, and an iron core cross rod 37 is transversely connected to any one of the connecting blocks 36, in use, the transformer coil is sleeved on the outer wall without the iron core cross rod 37, then the connecting block 36 with the iron core cross rod 37 is rotated, so that the end of the iron core cross rod 37 away from the connecting block 36 is in contact with the other connecting block 36, and the two iron core base columns 2 cooperate to form a magnetic circuit.

[0043] When the height of the transformer coil to be measured is longer than the height of the core base column 2, the connecting block 36 is pulled toward the side away from the receiving hole 2a, so that the shrinkage component 34 accommodated in the receiving hole 2a extends out of the receiving hole 2a. After a shrinkage component 34 is completely located outside the receiving hole 2a, the two first arc plates 341 and the two second arc plates 342 of the shrinkage component 34 are driven by the expansion component 343 to move toward the side close to and away from the second support plate, and the two first arc plates 341 and the second arc plates 342 are surrounded by each other to form an extended ring plate, one end of the extended ring plate is in contact with the end of the core base column 2 away from the operating table 1, and the other end is in contact with the side of the connecting block 36 close to the second support column 32; according to the required length of the core base column 2, a corresponding number of shrinkage components 34 are selected to be pulled out, and after the multiple shrinkage components 34 extend out of the receiving hole 2a, the multiple extended ring plates formed by the multiple shrinkage components 34 are in contact one by one with the sides close to each other;

[0044] Through the cooperation between the above structures, the length of the core base column 2 can be adjusted so that the core base column 2 can measure transformer coils of different sizes;

[0045] At the same time, the outer diameter of the extended part is the same as the outer diameter of the core base column 2. Since the thickness of the core base column 2 is closely related to the generated magnetic field, if the thickness is inconsistent, the magnetic field generated by the core base column 2 will be inconsistent, thereby affecting the accuracy of the measurement of the number of turns of the transformer coil.

[0046] Please refer to the attached Figure 3-4, the expansion component 343 comprises a first driving assembly 344 arranged on one side of each of the first arc plates 341 close to the second support column 32, and a second driving assembly 345 arranged on one side of each of the second arc plates 342 close to the second support column 32, the first driving assembly 344 is used to drive the first arc plate 341 to move away from the side close to the second support column 32, the second driving assembly 345 is used to drive the second arc plate 342 to move away from the side close to the second support column 32, the expansion component 343 further comprises a third driving assembly 346 connecting the first driving assembly 344 and the second driving assembly 345; the third driving assembly 346 is used to drive the first driving assembly 344 and the second driving assembly 345 to move together when the first arc plate 341 moves towards the side close to the second support column 32, and drive the second arc plate 342 to move towards the side close to the second support column 32 through the second driving assembly 345. Through the linkage of the third driving assembly 346, the second driving assembly 345 can be driven to move together with the first driving assembly 344 when the first driving assembly 344 moves towards the side close to the second support column 32, so that the first arc plate 341 and the second arc plate 342 can be retracted at the same time, so that when the retraction component 34 is sent into the accommodation hole 2a, only the first arc plate 341 needs to be pressed to make the outer diameter of the retraction component 34 smaller than the inner diameter of the accommodation hole 2a, so that the retraction component 34 can be accommodated in the accommodation hole 2a.

[0047] Please refer to the accompanying drawings Figure 2 , the first driving assembly 344 comprises a first movable block 3443 arranged on one side of the first arc plate 341 close to the second support column 32, the second support column 32 is provided with a second movable block 3444 on the side close to the first arc plate 341, the first movable block 3443 is rotatably provided with two first connecting rods 3441, the two first connecting rods 3441 are rotatably connected with a second connecting rod 3442 through a rotating shaft on the side away from the first movable block 3443, each second connecting rod 3442 is rotatably connected with the second movable block 3444 on the side away from the first connecting rod 3441, and the rotating directions of each first connecting rod 3441 and each second connecting rod 3442 are towards or away from the side close to the second arc plate 342, and the first movable block 3443 and the second movable block 3444 are connected through a first elastic component 3445. The two first connecting rods 3441 and the two second connecting rods 3442 cooperatively form a diamond structure, which can support and guide the first arc plate 341, when the first arc plate 341 is pressed to move towards the side close to the second support column 32, the first elastic component 3445 is compressed to generate elastic potential energy, and when the first arc plate 341 is released, the first elastic component 3445 releases the elastic force to drive the first arc plate 341 to move away from the side close to the second support column 32.

[0048] Please refer to the accompanying drawings Figure 3-5The second driving assembly 345 comprises two sets of rods 3451 arranged transversely on the second supporting column 32 near one side of the second arc plate 342. The end of each rod 3451 away from the second supporting plate is recessed to form a sliding hole 3451a, the extending direction of the sliding hole 3451a is perpendicular to the extending direction of the second supporting column 32. A push rod 3452 is arranged in each sliding hole 3451a. The end of each push rod 3452 near the rod 3451 is provided with a second elastic component 3453. The end of each push rod 3452 away from the rod 3451 is connected to the side of the second sliding plate near the second supporting column 32. Through the cooperation between the rod 3451 and the push rod 3452, the moving path of the second arc plate 342 can be limited, so that the second arc plate 342 cannot deviate from the path during movement, thereby affecting the formation of the extending ring plate. When the second arc plate 342 is pressed to move towards the side near the second supporting column 32, the second elastic component 3453 is compressed to generate elastic potential energy. When the second arc plate 342 is released, the second elastic component 3453 releases the elastic potential energy to push the second arc plate 342 to move away from the second supporting column 32.

[0049] Please refer to the accompanying drawings Figure 3-5 The outer wall of each rod 3451 is formed with a through groove 3451b connected to the sliding hole 3451a. The extending direction of the through groove 3451b is the same as that of the sliding hole 3451a. The third driving assembly 346 comprises a sliding block 3461 arranged in each through groove 3451b. One end of the sliding block 3461 extends out of the outer wall of the rod 3451, and the other end extends into the sliding hole 3451a and is connected to the push rod 3452. One end of each sliding block 3461 extending out of the outer wall of the rod 3451 is provided with a cable 3462.

[0050] The cables 3462 on any push rod 3452 of the two symmetrically arranged second driving assemblies 345 are connected to the two rotating shafts of an adjacent first driving assembly 344 one by one, and the two cables 3462 are cross-shaped.

[0051] The cables 3462 on the other push rods 3452 of the two symmetrically arranged second driving components 345 are connected to the two rotating shafts of the other adjacent first driving component 344 in a one-to-one correspondence, and the two cables 3462 are in a cross shape. By pressing the first curved plate 341 at the same time, the first curved plate 341 moves toward the side close to the second support column 32. During the movement of the first curved plate 341, the first connecting rod 3441 and the second connecting rod 3442 are driven to move relative to each other, so that the two rotating shafts move toward the side where they do not want to deviate from each other. As the rotating shaft moves, the cables 3462 connected thereto pull the corresponding slider 3461 toward the side close to the second support column 32, and at the same time drive the push rod 3452 to move together. The movement of the push rod 3452 drives the second curved plate 342 toward the side close to the second support column 32, thereby achieving the movement and contraction of the first curved plate 341 and the second curved plate 342, so that the contraction component 34 can be accommodated in the receiving slot 2a.

[0052] Please refer to the attached Figure 3 A direction limiting component is provided on one side of each first arc plate 341 near the second support column 32 to limit the movement direction of the first arc plate 341. The direction limiting component is used to limit the movement direction and movement path of the first arc plate 341 to prevent the first arc plate 341 from deviating from the path during movement.

[0053] Please refer to the attached Figure 3 The limiting assembly includes a first limiting rod laterally arranged on one side of the first arc plate 341 close to the second support column 32, and the end of the first limiting rod away from the first arc plate 341 is recessed to form a limiting hole, and the extension direction of the limiting hole is perpendicular to the extension direction of the second support column 32, and a second limiting rod is slidingly arranged in the limiting hole, and the end of the second limiting rod away from the first limiting rod is connected to the outer wall of the second support column 32, and the end of the second limiting rod away from the second support column 32 is symmetrically provided with limiting blocks on both sides, and the limiting hole is recessed to form a limiting groove for sliding the limiting block, and the extension direction of the limiting groove is in the same direction as the extension direction of the limiting hole;

[0054] When the side of the limit block facing away from the bottom of the limiting hole contacts the side of the limit slot facing away from the bottom of the limiting hole, the outer wall of the first curved plate 341 is exactly on the same vertical plane as the outer wall of the core column 2. The first and second limiting rods cooperate with each other to limit the movement direction of the first curved plate 341, allowing it to move along a fixed path. The limit block and the limiting slot cooperate with each other to keep the first curved plate 341 perpendicular to the core column 2. Furthermore, in conjunction with the second driving assembly 345, the first and second curved plates 341 and 342 cooperate to form an extended ring plate with the same outer and inner diameters as the core column 2.

[0055] Please refer to the attached Figure 1-2 The spacing between two adjacent shrinking components 34 is between 0.2 mm and 0.5 mm, so that the spacing between two adjacent extended ring plates is between 0.2 mm and 0.5 mm. The shrinking components 34 can slide along the outer wall of the second support column 32 along the length direction of the second support column 32, and the sliding range of each shrinking component 34 is within ±0.6 mm. The shrinking components 34 can slide slightly on the second support column 32, so that after the shrinking components 34 extend out of the receiving hole 2a, the second support column 32 can be pressed to make the multiple extended ring plates of the shrinking components 34 approach and contact each other. At the same time, the ring opening of the extended ring plate contacts the end of the core base column 2 facing away from the operating table 1, so that the extended ring plate and the core base column 2 are spliced ​​together to form a whole. The gap between the shrinking components 34 allows the adjacent shrinking components 34 to smoothly extend out of the receiving hole 2a and form an extended ring plate, avoiding the influence of the formation of the extended ring plate due to the excessive distance between the two shrinking components 34.

[0056] Please refer to the attached Figure 2 The end of the first support column 31 close to the second support column 32 is provided with a pulling component 35 for driving the second support column 32 to move toward the side close to the first support column 31. The pulling component 35 can be a tension spring provided at the end of the first support column 31 close to the second support column 32 for connecting the first support column 31 with the second support column 32, or it can be an elastic band. The inner wall of the second support column 32 close to the end of the first support column 31 is symmetrically provided with protrusions 33. The outer wall of the first support column 31 is recessed to form a sliding groove 31a for the sliding of the protrusion 33. The sliding groove 31a is arranged along the length direction of the first support column 31. The mutual cooperation between the protrusion 33 and the sliding groove 31a can prevent the second support column 32 from rotating.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A transformer coil turns measuring tool, characterized in that: The invention comprises an operating table, on which two iron core base columns capable of forming a magnetic field are vertically provided, a receiving hole is formed in a depression on a side of each of the iron core base columns facing away from the operating table, an iron core extension component is received in the receiving hole, the iron core extension component comprises a first support column vertically provided on the bottom surface of the receiving hole, a second support column is slidably provided on the outer wall of one end of the first support column facing away from the bottom of the receiving hole, a plurality of contraction components are arranged around the outer wall of the second support column, the plurality of contraction components are distributed along the extension direction of the second support column, the contraction component comprises two first arc plates symmetrically provided on both sides of the outer wall of the second support column, and two second arc plates symmetrically provided on the other two sides of the outer wall of the second support column, the first arc plates and the second arc plates are staggered; The contraction component also includes an expansion component arranged on the outer wall of the second support column for enabling the first arc plate and the second arc plate to move toward or away from the side of the second support column. When the first arc plate and the second arc plate both move toward the side close to the second support column, the contraction component can be accommodated in the accommodation hole; when the first arc plate and the second arc plate both move toward the side away from the second support column, the expansion component can drive the two sides of the two first arc plates and the two sides of the two second arc plates to approach each other, and form an extended ring plate whose outer diameter and inner diameter are equal to the outer diameter and inner diameter of the iron core base column.

2. The transformer coil turns measuring tool according to claim 1, characterized in that: The expansion component includes a first driving component arranged on the side of each first arc plate close to the second support column, and a second driving component arranged on the side of each second arc plate close to the second support column, the first driving component is used to drive the first arc plate to move toward the side away from the second support column, and the second driving component is used to drive the second arc plate to move toward the side away from the second support column, and the expansion component also includes a third driving component connecting the first driving component and the second driving component; the third driving component is used to make the first driving component and the second driving component drive in conjunction when the first arc plate moves toward the side close to the second support column, and drive the second arc plate toward the side close to the second support column through the second driving component.

3. The transformer coil turns measuring tool according to claim 2, characterized in that: The first driving assembly includes a first movable block arranged on a side of the first arc plate close to the second supporting column, a second movable block is provided on a side of the second supporting column close to the first arc plate, two first connecting rods are rotatably provided on the first movable block, and the ends of the two first connecting rods facing away from the first movable block are rotatably connected to the second connecting rod through a rotating shaft, and the ends of each second connecting rod facing away from the first connecting rod are rotatably connected to the second movable block, and the rotation direction of each first connecting rod and each second connecting rod is toward the side close to or away from the second arc plate, and the first movable block and the second movable block are connected by a first elastic component.

4. The transformer coil turns measuring tool according to claim 3, characterized in that: The second driving assembly includes two sets of rods horizontally arranged on the side of the second support column close to the second arc plate, and the ends of the two sets of rods facing away from the second support plate are recessed to form a sliding hole, and the extension direction of the sliding hole is perpendicular to the extension direction of the second support column. A push rod is slidably provided in each of the sliding holes, and a second elastic component is provided at the end of each push rod close to the rod, and the end of each push rod facing away from the rod is connected to the side of the second slide plate close to the second support column.

5. The transformer coil turns measuring tool according to claim 4, characterized in that: The outer wall of each sleeve rod is formed with a through slot connected to the slide hole, and the extension direction of the through slot is the same as the extension direction of the slide hole. The third driving component includes a slider slidably arranged in each through slot, one end of the slider extends out of the outer wall of the sleeve rod, and the other end extends into the slide hole and is connected to the push rod. A cable is provided on the end of each slider extending out of the outer wall of the sleeve rod; The cables on any one of the push rods of the two symmetrically arranged second driving components are connected to the two rotating shafts of an adjacent first driving component in a one-to-one correspondence, and the two cables are in a cross shape; The cables on the other push rods of the two symmetrically arranged second driving components are connected to the two rotating shafts of the other adjacent first driving component in a one-to-one correspondence, and the two cables are in a cross shape.

6. The transformer coil turns measuring tool according to any one of claims 1 to 5, characterized in that: A direction limiting component for limiting the moving direction of the first arc plate is provided on one side of each first arc plate close to the second support column.

7. The transformer coil turns measuring tool according to claim 6, characterized in that: The limiting assembly includes a first limiting rod laterally arranged on a side of the first arc plate close to the second support column, an end of the first limiting rod facing away from the first arc plate is recessed to form a limiting hole, an extension direction of the limiting hole is perpendicular to an extension direction of the second support column, a second limiting rod is slidingly arranged in the limiting hole, an end of the second limiting rod facing away from the first limiting rod is connected to an outer wall of the second support column, and limiting blocks are symmetrically provided on both sides of an end of the second limiting rod facing away from the second support column, a limiting groove is recessed in the limiting hole to form a limiting groove for sliding the limiting block, and the extension direction of the limiting groove is in the same direction as the extension direction of the limiting hole; When the side of the limiting block away from the bottom of the limiting hole collides with the side of the limiting groove away from the bottom of the limiting hole, the outer wall of the first arc plate is exactly on the same vertical plane as the outer wall of the core base column.

8. The transformer coil turns measuring tool according to claim 1, characterized in that: The interval between two adjacent contraction parts is between 0.2mm and 0.5mm, so that the interval between two adjacent extension ring plates is between 0.2mm and 0.5mm. The contraction parts can slide along the length direction of the second support column on the outer wall of the second support column, and the sliding range of each contraction part is within ±0.6mm.

9. The transformer coil turns measuring tool according to any one of claims 1 to 5, characterized in that: An end of the first support column close to the second support column is provided with a pulling component for driving the second support column to move toward a side close to the first support column.

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