A performance detection device for transformer core

Abstract

The present invention discloses a performance detection device for a transformer core, which relates to the technical field of transformers, and includes a base and a sliding sleeve assembly. A detection device body and a placement plate are sequentially installed on the top of the base from left to right, a vertical plate is installed on the right side of the base, a connecting slider is installed on the top of the top plate through an electric telescopic rod, and connecting strips are arranged on the left and right sides of the trapezoidal block; a third sliding groove is opened on the top of the top plate, a rack is installed on the upper end of the support plate, and a connecting plate is installed on the opposite side of the support plate. The performance detection device for the transformer core is provided with a sliding sleeve assembly, which can move up and down along the fixed plate when subjected to force, and the height of the movable plate is adjusted by the up and down movement of the sliding sleeve assembly, thereby adjusting the height of the conductive block on the movable plate, so as to facilitate performance detection of different positions of the core and improve the accuracy of detection.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a performance detection device for a transformer core. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components include a primary coil, a secondary coil, and an iron core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, and voltage stabilization. The working principle of the transformer is based on the law of electromagnetic induction. When an AC current flows through the primary coil, an AC magnetic flux is generated in the iron core, thereby inducing a voltage in the secondary coil. Through this electromagnetic mutual induction effect, the transformer can convert AC power of one voltage level into AC power of another voltage level of the same frequency.

[0003] Transformers are widely used in power systems, and are often used in the fields of step-up and step-down, power transmission and distribution, power supply for industrial equipment, power supply for transportation facilities, etc. The iron core is the main magnetic circuit part of the transformer, which is made of laminated silicon steel sheets to form a closed magnetic circuit. It allows the primary and secondary sides to couple through the magnetic circuit, thereby transmitting power; when alternating current is passed into the primary side of the transformer, alternating magnetic flux will be generated in the iron core. The function of the iron core is to guide the magnetic flux to form a closed loop, thereby generating an induced electromotive force on the secondary side. Therefore, the iron core plays a vital role in the transformer.

[0004] For example, the performance detection device, transformer manufacturing system and method of a transformer core with application number 201711337466.0 sets the prepared transformer core on the metal guide rod, controls the grip to rotate with the support rod as the axis, the metal guide rod approaches the seat, and the small diameter section of the metal guide rod is inserted into the depression of the seat. The power supply, metal guide rod, seat and display instrument form a closed loop through the wire, and the display instrument displays the transformer core performance value obtained by the test. However, the device still has certain defects;

[0005] When testing the performance of the iron core, it is impossible to test a specific position of the iron core, and it is impossible to adjust the testing position of the iron core, so it is impossible to test the performance of the iron core more accurately, and the applicability is low.

[0006] Therefore, we propose a performance detection device for a transformer core in order to solve the above-mentioned problems. Summary of the invention

[0007] The purpose of the present invention is to provide a performance detection device for a transformer core to solve the problem raised by the above background technology that when detecting the performance of the core in the current market, it is impossible to detect the specific position of the core, the detection position of the core cannot be adjusted, and thus the performance of the core cannot be detected more accurately, resulting in low applicability.

[0008] To achieve the above object, the present invention provides the following technical solutions: a performance detection device for a transformer core, comprising a base and a sliding sleeve assembly, wherein a detection device body and a placement plate are sequentially installed on the top of the base from left to right, a vertical plate is installed on the right side of the base, a top plate is installed on the top of the vertical plate, and a baffle is installed on the rear side of the top plate, a connecting slider is installed on the top of the top plate through an electric telescopic rod, and a trapezoidal block is installed on the connecting slider, connecting bars are provided on both sides of the trapezoidal block, and half gears are installed on the connecting bars;

[0009] A third slide groove is provided above the top plate, and support plates are passed through the left and right sides of the third slide groove, racks are installed on the upper ends of the support plates, connecting plates are installed on the opposite sides above the support plates, and fixed plates are installed below the connecting plates, a protrusion is installed on the front surface of the fixed plate, and a sliding sleeve assembly is sleeved on the fixed plate;

[0010] A movable bar runs through the sliding sleeve assembly, and a limit bar is installed on the opposite side of the movable bar, an anti-skid plate is installed on the opposite end of the movable bar, the anti-skid plate and the sliding sleeve assembly are connected by a telescopic spring, a movable plate is installed on the opposite side of the sliding sleeve assembly, and a conductive block is installed on the movable plate, the conductive block is connected to the detection device body through a wire, and an abutment block is installed on the opposite side below the support plate.

[0011] Preferably, first sliding grooves are provided on both left and right sides of the upper surface of the placement plate, and the abutment block is slidably connected to the first sliding grooves, and the abutment block is located directly below the conductive block.

[0012] With the above structural design, the abutment block can move along the first slide slot when it moves left and right under force, so that the abutment block is more stable when moving left and right without deviation, and the iron core is limited by the abutment block.

[0013] Preferably, a second slide groove is opened on the front surface of the baffle, the connecting slider is slidably connected to the second slide groove, the connecting bar is connected to the trapezoidal block through the first rotating shaft mechanism, and the connecting bar is connected to the arc block through the second rotating shaft mechanism.

[0014] With the above structural design, the electric telescopic rod is started, and the electric telescopic rod drives the connecting slider and the trapezoidal block to move up and down, and the connecting slider slides along the second slide groove, so that the connecting slider and the trapezoidal block can move up and down more stably.

[0015] Preferably, the arc block is fixed on the half gear, and the rear side of the half gear is connected to the baffle through a rotating shaft, and a bearing seat is installed at one end of the rotating shaft connected to the baffle.

[0016] With the above structural design, when the trapezoidal block is forced to move up and down, the connecting bar can drive the half gear to rotate in the opposite direction or relatively, and the half gear is forced to rotate along the rotation axis.

[0017] Preferably, the rack and the half gear are meshed with each other, and the lower surface of the rack is in contact with the upper surface of the top plate, and a through groove is provided on the left support plate.

[0018] With the above structural design, when the half gear rotates in the opposite direction, it can drive the rack below to move relative or in the opposite direction. When the rack moves relative to each other, it can drive the support plate below to move relative to each other, thereby driving the abutment block on the support plate to move relative to each other, and driving the conductive block on the movable plate to move relative to each other, so that the abutment block and the conductive block can clamp the iron core at the same time, thereby achieving the fixation and performance detection of the iron core.

[0019] Preferably, a reinforcing block is installed between the fixing plate and the connecting plate, a plurality of protrusions are arranged at equal intervals, and an adjustment indicator line is arranged on the side of the fixing plate.

[0020] With the above structural design, the reinforcing block can improve the installation stability of the fixed plate. When adjusting the height of the conductive block, the movable plate and the sliding sleeve assembly are moved up and down. When the sliding sleeve assembly moves, it can be adjusted by reference through the adjustment indicator line on the side of the fixed plate.

[0021] Preferably, the sliding sleeve assembly is slidably connected to the fixed plate, and a guide rod is installed below the connecting plate.

[0022] By adopting the above structural design, the sliding sleeve assembly can move up and down along the fixed plate when subjected to force. The height of the movable plate is adjusted by the up and down movement of the sliding sleeve assembly, thereby adjusting the height of the conductive block on the movable plate, thereby facilitating performance testing of different positions of the iron core and improving the accuracy of the detection.

[0023] Preferably, the guide rod and the sliding sleeve assembly are parallel to each other, and the guide rod passes through the sliding sleeve assembly, and the guide rod and the sliding sleeve assembly are slidably connected.

[0024] With the above structural design, the sliding sleeve assembly plays a guiding role through the guide rod, so that the sliding sleeve assembly is more stable when moving up and down and will not deviate.

[0025] Preferably, two telescopic springs are provided for sliding connection between the movable bar and the sliding sleeve assembly.

[0026] With the above structural design, when adjusting the sliding sleeve assembly, the anti-slip plate is pressed, and the anti-slip plate drives the movable bar and the limit bar to move toward the iron core direction, and then drives the limit bar to separate from the protrusion, and then releases the limit of the sliding sleeve assembly, and moves the sliding sleeve assembly up and down. When it moves to the desired position, the anti-slip plate is released, and the movable bar and the limit bar are reset under the action of the rebound force of the telescopic spring, so that the limit bar is located between the protrusions, thereby realizing the limitation of the sliding sleeve assembly.

[0027] Preferably, the limiting strip is located inside the sliding sleeve assembly, and the height of the limiting strip is smaller than the spacing between the protrusions.

[0028] With the above structural design, when the limiting strip is between the protrusions, it can limit the sliding sleeve assembly.

[0029] Compared with the prior art, the invention has the following beneficial effects: the performance detection device of the transformer core:

[0030] 1. A half gear and a rack are provided. When the half gear rotates in the opposite direction, the rack below can be driven to move relative or in the opposite direction. When the rack moves relative to each other, the support plate below can be driven to move relative to each other, thereby driving the abutment block on the support plate to move relative to each other, and driving the conductive block on the movable plate to move relative to each other, so that the abutment block and the conductive block can clamp the iron core at the same time, thereby fixing the iron core and detecting its performance;

[0031] 2. A sliding sleeve assembly is provided, which can move up and down along the fixed plate when subjected to force. The height of the movable plate is adjusted by the up and down movement of the sliding sleeve assembly, thereby adjusting the height of the conductive block on the movable plate, thereby facilitating performance testing of different positions of the iron core and improving the accuracy of the test;

[0032] 3. A protrusion and a limit strip are provided. When adjusting the sliding sleeve assembly, the anti-slide plate is pressed, and the anti-slide plate drives the movable strip and the limit strip to move toward the iron core direction, and then drives the limit strip to separate from the protrusion, and then releases the limit of the sliding sleeve assembly, and moves the sliding sleeve assembly up and down. When it moves to the desired position, the anti-slide plate is released, and the movable strip and the limit strip are reset under the action of the rebound force of the telescopic spring, so that the limit strip is located between the protrusions, thereby realizing the limit of the sliding sleeve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall main structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the overall rear view structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the overall bottom-up structure of the present invention;

[0036] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0037] Figure 5 This is a schematic diagram of the position structure of the half gear and the rack of the present invention;

[0038] Figure 6 It is a schematic diagram of the position structure of the fixing plate and the sliding sleeve assembly of the present invention;

[0039] Figure 7 It is a partial cross-sectional structural schematic diagram of the sliding sleeve assembly of the present invention;

[0040] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0041] Fig. 9 This is a schematic diagram of the internal structure of the sliding sleeve assembly of the present invention;

[0042] Fig.10 It is a schematic diagram of the position structure of the abutment block and the first sliding groove of the present invention.

[0043] In the figure: 1. base; 2. detection device body; 3. placement plate; 4. first slide groove; 5. vertical plate; 6. top plate; 7. baffle plate; 8. second slide groove; 9. electric telescopic rod; 10. connecting slider; 11. trapezoidal block; 12. first rotating shaft mechanism; 13. connecting strip; 14. second rotating shaft mechanism; 15. arc block; 16. half gear; 17. rotating shaft; 18. third slide groove; 19. support plate; 20. rack; 21. through groove; 22. connecting plate; 23. fixed plate; 24. reinforcement block; 25. protrusion; 26. sliding sleeve assembly; 27. guide rod; 28. movable strip; 29. ​​limit strip; 30. anti-skid plate; 31. telescopic spring; 32. movable plate; 33. conductive block; 34. wire; 35. abutment block. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0045] See also Figure 1-Figure 10The present invention provides a technical solution: a performance detection device for a transformer core, comprising a base 1, a detection device body 2, a placement plate 3, a first slide 4, a vertical plate 5, a top plate 6, a baffle 7, a second slide 8, an electric telescopic rod 9, a connecting slider 10, a trapezoidal block 11, a first rotating shaft mechanism 12, a connecting bar 13, a second rotating shaft mechanism 14, an arc block 15, a half gear 16, a rotating shaft 17, a third slide 18, a support plate 19, a rack 20, a through groove 21, a connecting plate 22, a fixing plate 23, a reinforcing block 24, a protrusion 25, a sliding sleeve assembly 26, a guide rod 27, and a movable bar 2 8. Limiting strip 29, anti-slip plate 30, telescopic spring 31, movable plate 32, conductive block 33, wire 34 and abutment block 35. The detection device body 2 and the placement plate 3 are installed from left to right on the top of the base 1. The left and right sides of the upper surface of the placement plate 3 are provided with first slide grooves 4. The abutment block 35 is slidably connected with the first slide groove 4. The abutment block 35 is located directly below the conductive block 33. When the abutment block 35 is moved left and right under force, it can move along the first slide groove 4, so that the abutment block 35 is more stable when it moves left and right, and will not deviate. The iron core is limited by the abutment block 35, and the base 1 A vertical plate 5 is installed on the right side, and a top plate 6 is installed above the vertical plate 5, and a baffle 7 is installed on the rear side of the top plate 6. A second slide groove 8 is opened on the front surface of the baffle 7. The connecting slider 10 is slidably connected with the second slide groove 8. The connecting bar 13 is connected to the trapezoidal block 11 through the first rotating shaft mechanism 12. The connecting bar 13 is connected to the arc block 15 through the second rotating shaft mechanism 14. The electric telescopic rod 9 is started, and the electric telescopic rod 9 drives the connecting slider 10 and the trapezoidal block 11 to move up and down. The connecting slider 10 slides along the second slide groove 8, so that the connecting slider 10 and the trapezoidal block 11 can move up and down more. Stable, a connecting slider 10 is installed above the top plate 6 through an electric telescopic rod 9, and a trapezoidal block 11 is installed on the connecting slider 10, connecting bars 13 are provided on the left and right sides of the trapezoidal block 11, and half gears 16 are installed on the connecting bars 13, the arc block 15 is fixed on the half gear 16, and the rear side of the half gear 16 is connected to the baffle 7 through a rotating shaft 17, and a bearing seat is installed at one end of the rotating shaft 17 connected to the baffle 7. When the trapezoidal block 11 is forced to move up and down, the half gear 16 can be driven by the connecting bar 13 to rotate in the opposite direction or relatively, and the half gear 16 is forced to rotate along the rotating shaft 17.

[0046] A third slide groove 18 is provided above the top plate 6, and support plates 19 are penetrated on both the left and right sides of the third slide groove 18. A rack 20 is installed on the upper end of the support plate 19. The rack 20 and the half gear 16 are meshed with each other, and the lower surface of the rack 20 abuts against the upper surface of the top plate 6. A through groove 21 is provided on the left support plate 19. When the half gear 16 rotates in the opposite direction, the rack 20 below can be driven to move relative or reversely. When the rack 20 moves relatively, it can drive the support plate 19 below to move relatively, thereby driving the support plate 1 The abutment block 35 on the support plate 19 moves relative to each other, driving the conductive block 33 on the movable plate 32 to move relative to each other, so that the abutment block 35 and the conductive block 33 can clamp the iron core at the same time, thereby fixing and testing the performance of the iron core. A connecting plate 22 is installed on the upper opposite side of the support plate 19, and a fixing plate 23 is installed under the connecting plate 22. A reinforcing block 24 is installed between the fixing plate 23 and the connecting plate 22. Several convex blocks 25 are arranged at equal distances. An adjustment indicator line is arranged on the side of the fixing plate 23. The reinforcing block 24 can improve the fixation. The installation stability of the plate 23 is ensured. When adjusting the height of the conductive block 33, the movable plate 32 and the sliding sleeve assembly 26 are moved up and down. When the sliding sleeve assembly 26 moves, it can be adjusted by reference through the adjustment indicator line on the side of the fixed plate 23. A protrusion 25 is installed on the front surface of the fixed plate 23. The sliding sleeve assembly 26 is sleeved on the fixed plate 23. The sliding sleeve assembly 26 is slidably connected to the fixed plate 23. A guide rod 27 is installed under the connecting plate 22. The sliding sleeve assembly 26 can move up and down along the fixed plate 23 when subjected to force. The up and down movement of the sleeve assembly 26 adjusts the height of the movable plate 32, thereby adjusting the height of the conductive block 33 on the movable plate 32, so as to facilitate performance testing of different positions of the iron core and improve the accuracy of the detection. The guide rod 27 and the sleeve assembly 26 are parallel to each other, and the guide rod 27 runs through the sleeve assembly 26. The guide rod 27 is slidably connected to the sleeve assembly 26. The sleeve assembly 26 plays a guiding role through the guide rod 27, so that the sleeve assembly 26 is more stable when moving up and down and will not deviate.

[0047] A movable bar 28 runs through the sliding sleeve assembly 26, and two telescopic springs 31 are provided between the movable bar 28 and the sliding sleeve assembly 26 for sliding connection. When the sliding sleeve assembly 26 is adjusted, the anti-slide plate 30 is pressed, and the anti-slide plate 30 drives the movable bar 28 and the limit bar 29 to move toward the iron core direction, and then drives the limit bar 29 to separate from the protrusion 25, and then releases the limit of the sliding sleeve assembly 26, and moves the sliding sleeve assembly 26 up and down. When it moves to the desired position, the anti-slide plate 30 is released, and the movable bar 28 and the limit bar 29 are reset under the action of the rebound force of the telescopic spring 31, so that the limit bar 29 is located between the protrusions 25, thereby realizing the limit of the sliding sleeve assembly 26 ... A limit strip 29 is installed on the opposite side of the strip 28. The limit strip 29 is located inside the sliding sleeve assembly 26, and the height of the limit strip 29 is less than the spacing between the protrusions 25. When the limit strip 29 is between the protrusions 25, it can limit the sliding sleeve assembly 26. An anti-skid plate 30 is installed on the opposite end of the movable strip 28. The anti-skid plate 30 is connected to the sliding sleeve assembly 26 through a telescopic spring 31. A movable plate 32 is installed on the opposite side of the sliding sleeve assembly 26, and a conductive block 33 is installed on the movable plate 32. The conductive block 33 is connected to the detection device body 2 through a wire 34. A contact block 35 is installed on the opposite side below the support plate 19.

[0048] Working principle: When using the performance detection device of the transformer core, first, place the core to be detected on the placement plate 3, start the electric telescopic rod 9, and the electric telescopic rod 9 drives the connecting slider 10 and the trapezoidal block 11 to move up and down. When the trapezoidal block 11 is forced to move up and down, the connecting bar 13 can drive the half gear 16 to rotate in the opposite direction or relatively. The half gear 16 is forced to rotate along the rotating shaft 17. When the half gear 16 rotates in the opposite direction, it can drive the rack 20 below to move relatively or reversely. When the rack 20 moves relatively, it can drive the support plate 19 below to move relatively, thereby driving the abutment block 35 on the support plate 19 to move relatively, and driving the conductive block 33 on the movable plate 32 to move relatively, so that the abutment block 35 and the conductive block 33 can clamp the core at the same time, so as to fix and detect the performance of the core. At this time, the conductive block 33, the core, the wire 34 and the detection device body 2 form a complete circuit, and the performance of the core is detected through the detection device body 2.

[0049] When it is necessary to perform performance testing on different positions of the iron core, the sliding sleeve assembly 26 can move up and down along the fixed plate 23 when subjected to force. By moving the sliding sleeve assembly 26 up and down, the height of the movable plate 32 is adjusted, thereby adjusting the height of the conductive block 33 on the movable plate 32, so as to facilitate the performance testing of different positions of the iron core and improve the accuracy of the detection; when adjusting the sliding sleeve assembly 26, the anti-slip plate 30 is pressed, and the anti-slip plate 30 drives the movable bar 28 and the limit bar 29 to move toward the iron core, and then drives the limit bar 29 to separate from the protrusion 25, and then releases the limit of the sliding sleeve assembly 26, and moves the sliding sleeve assembly 26 up and down. When it moves to the required position, the anti-slip plate 30 is released, and the movable bar 28 and the limit bar 29 are reset under the action of the rebound force of the telescopic spring 31, so that the limit bar 29 is located between the protrusions 25, thereby realizing the limit of the sliding sleeve assembly 26. Thus, a series of work is completed. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer core performance detection device, comprising a base (1) and a sleeve assembly (26), characterized in that: A detection device body (2) and a placement plate (3) are sequentially installed above the base (1) from left to right; a vertical plate (5) is installed on the right side of the base (1); a top plate (6) is installed above the vertical plate (5); a baffle (7) is installed on the rear side of the top plate (6); a connecting slider (10) is installed above the top plate (6) via an electric telescopic rod (9); a trapezoidal block (11) is installed on the connecting slider (10); connecting bars (13) are provided on both left and right sides of the trapezoidal block (11); and a half gear (16) is installed on the connecting bar (13); A third slide groove (18) is provided above the top plate (6), and support plates (19) are passed through the left and right sides of the third slide groove (18), a rack (20) is installed on the upper end of the support plate (19), a connecting plate (22) is installed on the upper opposite side of the support plate (19), and a fixing plate (23) is installed below the connecting plate (22), a protrusion (25) is installed on the front surface of the fixing plate (23), and a sliding sleeve assembly (26) is sleeved on the fixing plate (23); The sliding sleeve assembly (26) is penetrated by a movable bar (28), and a limit bar (29) is installed on the opposite side of the movable bar (28), an anti-slip plate (30) is installed on the opposite end of the movable bar (28), and the anti-slip plate (30) is connected to the sliding sleeve assembly (26) via a telescopic spring (31), a movable plate (32) is installed on the opposite side of the sliding sleeve assembly (26), and a conductive block (33) is installed on the movable plate (32), and the conductive block (33) is connected to the detection device body (2) via a wire (34), and an abutment block (35) is installed on the opposite side below the support plate (19).

2. The performance detection device for the transformer core according to claim 1, characterized in that: The upper surface of the placement plate (3) is provided with first sliding grooves (4) on both left and right sides. The abutment block (35) is slidably connected to the first sliding grooves (4). The abutment block (35) is located directly below the conductive block (33).

3. The performance detection device for the transformer core according to claim 1, characterized in that: A second slide groove (8) is provided on the front surface of the baffle (7), the connecting slide block (10) is slidably connected to the second slide groove (8), the connecting bar (13) is connected to the trapezoidal block (11) via a first rotating shaft mechanism (12), and the connecting bar (13) is connected to the arc block (15) via a second rotating shaft mechanism (14).

4. The performance detection device for the transformer core according to claim 3, characterized in that: The arc block (15) is fixed on the half gear (16), and the rear side of the half gear (16) is connected to the baffle (7) via a rotating shaft (17), and a bearing seat is installed at one end of the rotating shaft (17) connected to the baffle (7).

5. The performance detection device for transformer core according to claim 1, characterized in that: The rack (20) and the half gear (16) are meshed with each other, and the lower surface of the rack (20) is in contact with the upper surface of the top plate (6). A through groove (21) is provided on the left support plate (19).

6. The performance detection device for transformer core according to claim 1, characterized in that: A reinforcing block (24) is installed between the fixing plate (23) and the connecting plate (22), a plurality of protrusions (25) are arranged at equal intervals, and an adjustment indicator line is arranged on the side of the fixing plate (23).

7. The performance detection device for transformer core according to claim 1, characterized in that: The sliding sleeve assembly (26) is slidably connected to the fixed plate (23), and a guide rod (27) is installed below the connecting plate (22).

8. The performance detection device for transformer core according to claim 7, characterized in that: The guide rod (27) and the sliding sleeve assembly (26) are parallel to each other, and the guide rod (27) passes through the sliding sleeve assembly (26). The guide rod (27) and the sliding sleeve assembly (26) are slidably connected.

9. The performance detection device for transformer core according to claim 1, characterized in that: Two telescopic springs (31) are provided for sliding connection between the movable bar (28) and the sliding sleeve assembly (26).

10. The performance detection device for transformer core according to claim 1, characterized in that: The limiting strip (29) is located inside the sliding sleeve assembly (26), and the height of the limiting strip (29) is less than the spacing between the protrusions (25).

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