An improved dry-type transformer core

Abstract

The present invention relates to the technical field of dry-type transformers, and specifically relates to an improved dry-type transformer core, comprising a base plate and three groups of silicon steel sheets arranged above the base plate, and also comprising four steel plates, wherein two adjacent steel plates form a group, and two groups of steel plates are respectively located on both sides of the topmost group of silicon steel sheets and the bottommost group of silicon steel sheets, and the four steel plates are used to clamp the silicon steel sheets located on the topmost group and the bottommost group of silicon steel sheets. This improved dry-type transformer core effectively enhances the stability of the core in the vertical direction by clamping the topmost and bottommost silicon steel sheets through the four steel plates, while improving the overall structural strength. This design helps to reduce the vibration and displacement of the silicon steel sheets during the operation of the transformer and during the clamping of the silicon steel sheets by the steel plates, thereby extending the service life of the transformer while improving the assembly efficiency of the transformer core.

Description

Technical Field

[0001] The invention relates to the technical field of dry-type transformers, in particular to an improved dry-type transformer core. Background Art

[0002] The iron core is the magnetic circuit of the transformer. It converts the electrical energy of the transformer's primary circuit into magnetic energy, and then converts the magnetic energy into electrical energy of the secondary circuit, realizing the transmission of electrical energy. The iron core is also the internal skeleton of the transformer, supporting the windings and other components to ensure the stable operation of the transformer. The iron core of a dry-type transformer is mainly composed of multiple layers of high-energy silicon steel sheets or copper-aluminum strips, among which high-quality cold-rolled electrical steel sheets and high-quality electrolytic pure copper or aluminum are the main structural materials. These materials have good magnetic conductivity and mechanical strength, which can meet the performance requirements of the transformer. The iron core is composed of silicon steel sheets and clamping devices. The clamping devices connect the silicon steel sheets to each other to form a complete and solid iron core structure.

[0003] However, we found in actual use that after the silicon steel sheets are assembled, the clamping device used in the existing dry-type transformer core is a steel plate and bolts. The specific steps are to first place the steel plates on both sides of the stacked silicon steel sheets, and then penetrate the corresponding two steel plates with bolts, and then tighten the nuts to reduce the distance between the two steel plates, and clamp the stacked silicon steel sheets to complete the assembly of the core. However, this method can easily cause the silicon steel sheets in contact with the steel plates to shift during the process of tightening the nuts, which requires the staff to readjust the position of the silicon steel sheets, thereby affecting the work efficiency of the core assembly. For this reason, we propose an improved dry-type transformer core. Summary of the Invention

[0004] A technical problem to be solved by the present application is: how to ensure that the silicon steel sheets do not have positional deviation during the core assembly process, so as to improve the stacking speed and assembly efficiency of the silicon steel sheets.

[0005] In order to solve the above technical problems, the embodiment of the present application provides an improved dry-type transformer core, comprising a bottom plate and three groups of silicon steel sheets arranged above the bottom plate, and further comprising

[0006] There are four steel plates, wherein two adjacent steel plates form a group, and the two groups of steel plates are respectively located on both sides of the uppermost group of silicon steel sheets and the lowermost group of silicon steel sheets, and the four steel plates are used to clamp the uppermost group of silicon steel sheets and the lowermost group of silicon steel sheets;

[0007] There are two clamping assemblies, each of which is disposed on the two groups of steel plates. The two clamping assemblies are used to drive the two groups of steel plates to move, thereby clamping the corresponding silicon steel sheets.

[0008] There are three correction assemblies, and the three correction assemblies are all arranged on the outside of the silicon steel sheets in the middle group. The three correction assemblies are used to adjust the position of the silicon steel sheets in the middle group, so that the position of the silicon steel sheets in the middle group is offset during the stacking process and then corrected.

[0009] In some embodiments, the clamping assembly includes a positioning member arranged on one side of the two steel plates, and the positioning member is used to drive the two steel plates to be located in the same plane during the clamping process of the silicon steel sheet. A driving member is provided on one side of one of the two steel plates, and the driving member is used to generate power to provide power when the two steel plates are clamped. An extrusion member is provided on one side of one of the two steel plates, and the extrusion member is used to drive the two steel plates close together, thereby clamping the silicon steel sheet.

[0010] In some embodiments, the positioning member includes positioning plates arranged at both ends of one of the two steel plates, and the other steel plate is provided with positioning grooves used in conjunction with the two positioning plates, and both positioning plates are provided with auxiliary grooves at one end close to the two positioning grooves.

[0011] In some embodiments, the driving member includes a driving frame arranged on the opposite sides of the two positioning plates, and the two driving frames are arranged on a steel plate with two positioning grooves, and a bidirectional screw is rotatably arranged on the two driving frames, and a driving block is arranged on the outside of the bidirectional screw, and the driving block is located in the middle section of the bidirectional screw, the bidirectional screw passes through the two positioning plates, and its diameter is smaller than the two auxiliary grooves.

[0012] In some embodiments, the extrusion part includes extrusion grooves respectively opened on the two positioning plates, and an extrusion block used in conjunction with the two extrusion grooves is provided on the outside of the bidirectional screw, and the two extrusion blocks are both threadedly connected to the bidirectional screw, and the back sides of the two extrusion blocks are both inclined surfaces. A limiting plate is provided on the side of the two extrusion blocks close to the steel plate, and a limiting groove used in conjunction with the two limiting plates is opened inside the steel plate that is closest to the two extrusion blocks.

[0013] In some embodiments, the correction assembly includes a folding member arranged on the outside of the silicon steel sheets located in the middle group, and the folding member is used to fold the silicon steel sheets located in the middle group. A locking member is provided on the outside of the silicon steel sheets located in the middle group, and the locking member is used to lock the position of the folded silicon steel sheets. A guiding member is provided on the outside of the silicon steel sheets located in the middle group, and the guiding member is used to guide the installation process of the silicon steel sheets located in the upper group.

[0014] In some embodiments, the folding member includes a first folding plate arranged on the outside of the middle group of silicon steel sheets, and a second folding plate is arranged on one end of the first folding plate through a rotating shaft. The first folding plate and the second folding plate are both arc-shaped, and the first folding plate and the second folding plate are both in contact with the outside of the middle group of silicon steel sheets.

[0015] In some embodiments, the locking member includes locking rods slidably arranged at both ends of the first folding plate, locking springs are arranged at opposite ends of the two locking rods, and the ends of the two locking springs away from the two locking rods are arranged on the first folding plate, and locking grooves for cooperating with the two locking rods are provided at both ends of the second folding plate, and the opposite ends of the two locking rods are both inclined surfaces.

[0016] In some embodiments, the guide member includes a guide groove opened in the first folding plate and the second folding plate, a guide plate is slidably arranged in the two guide grooves, a plurality of guide springs are arranged at the bottom ends of the two guide plates, and the ends of the plurality of guide springs away from the two guide plates are arranged in the corresponding guide grooves.

[0017] In some embodiments, a pad is provided at one end of the two positioning plates away from the two positioning grooves, a plurality of bolts are provided on the outside of the two pads, and the two pads are threadedly connected to the steel plate through the plurality of bolts.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. Four steel plates are used to clamp the top and bottom silicon steel sheets, which effectively enhances the vertical stability of the core and improves the overall structural strength. This design helps reduce the vibration and displacement of the silicon steel sheets during transformer operation and during the clamping process of the steel plates, thereby extending the service life of the transformer and improving the assembly efficiency of the transformer core.

[0020] 2. The design of the clamping assembly and the correction assembly makes the installation and positioning of the silicon steel sheet more precise. The clamping assembly can ensure that the steel plate remains in the same plane when clamping the silicon steel sheet through the cooperation of the positioning parts, driving parts and extrusion parts, thereby avoiding the displacement of the silicon steel sheet during the process of the steel plate clamping the silicon steel sheet, thereby improving the stacking accuracy of the silicon steel sheet. The correction assembly can adjust the position of the middle group of silicon steel sheets to ensure that they can be corrected in time even if they are offset during the stacking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the silicon steel sheet of the present invention;

[0023] Figure 3 This is a schematic exploded view of a partial structure of the clamping assembly of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the driving member of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the limiting plate of the present invention;

[0026] Figure 6 This is a schematic diagram of the correction component structure of the present invention;

[0027] Figure 7 This is an exploded schematic diagram of the collapsible member structure of the present invention;

[0028] Figure 8 This is an exploded schematic diagram of the locking member structure of the present invention;

[0029] Figure 9 It is a side sectional schematic diagram of the second folding plate structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the guide groove structure of the present invention;

[0031] Figure 11 This is a structural diagram of Example 2 of the present invention.

[0032] In the figure: 1. Base plate; 2. Silicon steel sheet; 3. Steel plate; 4. Clamping assembly; 5. Correction assembly; 6. Positioning member; 61. Positioning plate; 62. Positioning groove; 63. Auxiliary groove; 7. Driving member; 71. Driving frame; 72. Bidirectional screw; 73. Driving block; 8. Extrusion member; 81. Extrusion groove; 82. Extrusion block; 83. Limiting plate; 84. Limiting groove; 9. Folding member; 91. First folding plate; 92. Second folding plate; 10. Locking member; 101. Locking rod; 102. Locking spring; 103. Locking groove; 11. Guide member; 111. Guide groove; 112. Guide plate; 113. Guide spring; 12. Pad; 13. Bolt. DETAILED DESCRIPTION

[0033] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-10The present invention provides a technical solution: an improved dry-type transformer core, comprising a bottom plate 1 and three groups of silicon steel sheets 2 arranged above the bottom plate, and further comprising

[0035] There are four steel plates 3, wherein two adjacent steel plates 3 form a group, and the two groups of steel plates 3 are respectively located on both sides of the top group of silicon steel sheets 2 and the bottom group of silicon steel sheets 2, and the four steel plates 3 are used to clamp the top group of silicon steel sheets 2 and the bottom group of silicon steel sheets 2;

[0036] There are two clamping assemblies 4, which are respectively arranged on the two groups of steel plates 3. The two clamping assemblies 4 are used to drive the two groups of steel plates 3 to move, so as to drive the two groups of steel plates 3 to clamp the corresponding silicon steel sheets 2;

[0037] There are three correction components 5, and the three correction components 5 are all arranged on the outside of the silicon steel sheets 2 in the middle group. The three correction components 5 are used to adjust the position of the silicon steel sheets 2 in the middle group, so that the position of the silicon steel sheets 2 in the middle group is offset during the stacking process and then corrected.

[0038] The clamping assembly 4 includes a positioning member 6 arranged on one side of the two steel plates 3, and the positioning member 6 is used to drive the two steel plates 3 to be located in the same plane during the clamping process of the silicon steel sheet 2. A driving member 7 is provided on one side of one of the two steel plates 3, and the driving member 7 is used to generate power to provide power for clamping the two steel plates 3. An extrusion member 8 is provided on one side of one of the two steel plates 3, and the extrusion member 8 is used to drive the two steel plates 3 closer together, thereby clamping the silicon steel sheet 2.

[0039] The positioning member 6 includes a positioning plate 61 arranged at both ends of one of the two steel plates 3, and a positioning groove 62 is opened on the other steel plate 3 for use with the two positioning plates 61. The two positioning plates 61 are each provided with an auxiliary groove 63 at one end close to the two positioning grooves 62. First, the two steel plates 3 are located on both sides of a group of silicon steel sheets 2 below, and then the positioning plates 61 at both ends are inserted into the other steel plate 3 with the positioning grooves 62 at both ends through the steel plate 3 with the positioning plates 61, so that the positioning plates 61 slide in the corresponding positioning grooves 62. The auxiliary groove 63 opened at one end of the positioning plate 61 can prevent the bidirectional screw 72 from affecting the normal movement trajectory of the positioning plate 61 when the positioning plate 61 passes through the bidirectional screw 72. Its function is to ensure that the two steel plates 3 are located in the same plane through the cooperation of the two positioning plates 61 and the two positioning grooves 62, and no angular deviation will occur during the clamping process of the two steel plates 3.

[0040] The driving member 7 includes a driving frame 71 arranged on the opposite sides of the two positioning plates 61, and the two driving frames 71 are arranged on the steel plate 3 with two positioning grooves 62. A bidirectional screw 72 is rotatably arranged on the two driving frames 71, and a driving block 73 is arranged on the outside of the bidirectional screw 72, and the driving block 73 is located in the middle section of the bidirectional screw 72. The bidirectional screw 72 passes through the two positioning plates 61, and its diameter is smaller than the two auxiliary grooves 63. When the positioning plate 61 is inserted into the corresponding positioning groove 62, by rotating the driving block 73, when the driving block 73 rotates, the driving block 73 will drive the bidirectional screw 72 inside it to rotate together. The driving frames 71 at both ends of the bidirectional screw 72 can ensure the stability of the bidirectional screw 72 during rotation. Its function is to provide power for the movement of the two extrusion blocks 82 by rotating the driving block 73.

[0041] The extrusion piece 8 includes an extrusion groove 81 respectively provided on the two positioning plates 61, an extrusion block 82 for use with the two extrusion grooves 81 is provided on the outside of the bidirectional screw 72, and the two extrusion blocks 82 are threadedly connected to the bidirectional screw 72, and the two extrusion blocks 82 are both inclined on the opposite sides. A limit plate 83 is provided on the side of the two extrusion blocks 82 close to the steel plate 3. Among the two steel plates 3, the steel plate 3 closest to the two extrusion blocks 82 has a limit groove 84 for use with the two limit plates 83 provided inside it. When the bidirectional screw 72 rotates, the two extrusion blocks 82 threadedly connected to the bidirectional screw 72 will move under the action of the bidirectional screw 72. Due to the limit plates respectively provided on one side of the two extrusion blocks 82 The positioning plate 83 will limit the movement trajectory of the extrusion block 82, so that when the bidirectional screw 72 rotates, the two extrusion blocks 82 arranged on its outside will move toward the opposite sides of it. When the two extrusion blocks 82 move, the limit blocks respectively arranged on one side will slide in the limit groove 84, thereby limiting the movement trajectory of the extrusion block 82. When the two extrusion blocks 82 move toward the opposite sides of them, the two extrusion blocks 82 will be inserted into the corresponding extrusion groove 81 through their respective inclined surfaces, so that the extrusion blocks 82 will lift the positioning plate 61, and then the two steel plates 3 will gradually approach, clamping and fixing the silicon steel sheets 2 in the lower group. Its function is to clamp and fix the silicon steel sheets 2 in the upper group or the lower group.

[0042] The correction assembly 5 includes a folding member 9 arranged on the outside of the middle group of silicon steel sheets 2, and the folding member 9 is used to fold the silicon steel sheets 2 in the middle group. A locking member 10 is provided on the outside of the silicon steel sheets 2 in the middle group, and the locking member 10 is used to lock the position of the folded silicon steel sheets 2. A guide member 11 is provided on the outside of the silicon steel sheets 2 in the middle group, and the guide member 11 is used to guide the installation process of the silicon steel sheets 2 in the upper group.

[0043] The folding member 9 includes a first folding plate 91 arranged on the outside of the middle group of silicon steel sheets 2, and a second folding plate 92 is provided at one end of the first folding plate 91 by rotating through a rotating shaft. The first folding plate 91 and the second folding plate 92 are both arc-shaped, and the first folding plate 91 and the second folding plate 92 are both in contact with the outside of the middle group of silicon steel sheets 2. The first folding plate 91 is placed horizontally, and then the first folding plate 91 is placed under the silicon steel sheets 2 with its curved surface facing upward, and then the silicon steel sheets 2 can continue to be stacked. The first folding plate 91 can limit the edge of the middle group of silicon steel sheets 2 during the stacking process of the middle group of silicon steel sheets 2. When the middle group of silicon steel sheets 2 exceeds the first folding plate 91, the first folding plate 91 can limit the edge of the middle group of silicon steel sheets 2. When one folding plate 91 is flat, the second folding plate 92 can be rotated to squeeze the silicon steel sheets 2 that are beyond the plane of the first folding plate 91 inward, so that the outer sides of the stacked silicon steel sheets 2 maintain an arc surface. In addition, the two ends of the first folding plate 91 and the second folding plate 92 can limit the positions of the upper and lower groups of silicon steel sheets 2 during the stacking process, avoiding the upper and lower groups of silicon steel sheets 2 from stacking too much inward and exceeding the predetermined range during the stacking process. Its function is to guide and limit the stacking process of the silicon steel sheets 2, and ensure the control of the distance between the upper, middle and lower groups of silicon steel sheets 2 during the stacking process.

[0044] The locking member 10 includes a locking rod 101 slidably arranged at both ends of the first folding plate 91, and locking springs 102 are provided at the opposite ends of the two locking rods 101. The ends of the two locking springs 102 away from the two locking rods 101 are both arranged on the first folding plate 91, and the two ends of the second folding plate 92 are provided with locking grooves 103 used in conjunction with the two locking rods 101, and the opposite ends of the two locking rods 101 are both inclined. When the middle group of silicon steel sheets 2 is completed after stacking, the second folding plate 92 is rotated to make the locking groove 103 on the second folding plate 92 gradually approach the locking rod 101 on the first folding plate 91 until the second folding plate 92 contacts the locking rod 101, and then continues to squeeze. When the second folding plate 92 continues to press the locking rod 101 During extrusion, since the locking rod 101 is an inclined surface, the squeezed locking rod 101 retracts into the first folding plate 91 under the action of the locking spring 102. When the locking groove 103 on the second folding plate 92 is located at the same axis as the locking rod 101, the locking spring 102 will pop out the locking rod 101 and make the locking rod 101 stuck in the locking groove 103, so that the second folding plate 92 and the first folding plate 91 wrap the middle group of silicon steel sheets 2, thereby completing the fixation of the middle group of silicon steel sheets 2. Its function is that after the middle group of silicon steel sheets 2 are stacked, the position of the middle group of silicon steel sheets 2 can be fixed by locking the first folding plate 91 and the second folding plate 92, so as to facilitate the subsequent winding to be sleeved on the outside of the transformer core.

[0045] The guide member 11 includes a guide groove 111 provided in the first and second folding plates 91, 92, and a guide plate 112 is slidably provided in the two guide grooves 111. The bottom ends of the two guide plates 112 are provided with multiple guide springs 113. The ends of the multiple guide springs 113 away from the two guide plates 112 are all provided in the corresponding guide grooves 111. When the installation of the winding is completed and the upper group of silicon steel sheets 2 needs to be stacked, the guide grooves 111 provided on the first and second folding plates 91, 92 respectively, and the guide springs 113 inside them will control the corresponding guide plates 112 to pop out. The popped-up guide plates 112 can assist the silicon steel sheets 2 in the stacking process when the staff stacks the upper group of silicon steel sheets 2, thereby preventing the silicon steel sheets 2 from tilting or sliding, and ensuring that the stacking of the upper group of silicon steel sheets 2 will not cause sliding problems, thereby affecting the stacking efficiency of the upper group of silicon steel sheets 2. Its function is to guide the upper group of silicon steel sheets 2 during the stacking process.

[0046] During use, the transformer core is usually assembled in two ways. The first way is to stack three groups of silicon steel sheets 2 first, and then, after the stacking of the silicon steel sheets 2 is completed, the silicon steel sheets 2 located in the upper group and the lower group are clamped with steel plates 3;

[0047] The second method is to first stack the bottom group and the middle group of silicon steel sheets 2, and then clamp the bottom group of stacked silicon steel sheets 2 with steel plates 3, and then put the winding on the outside of the middle group of silicon steel sheets 2, and finally stack the upper group of silicon steel sheets 2. After the upper group of silicon steel sheets 2 are stacked, the steel plates 3 are also used to clamp the upper group of silicon steel sheets 2, thereby completing the assembly of the transformer core;

[0048] When the staff needs to stack the silicon steel sheets 2, the first folding plate 91 is placed horizontally, and then the first folding plate 91 is placed under the silicon steel sheet 2 with its curved surface facing up, and then the silicon steel sheets 2 can continue to be stacked. The first folding plate 91 can limit the edge of the middle group of silicon steel sheets 2 during the stacking process of the middle group of silicon steel sheets 2. When the middle group of silicon steel sheets 2 exceeds the plane of the first folding plate 91, the second folding plate 92 can be rotated to squeeze the silicon steel sheets 2 exceeding the plane of the first folding plate 91 inward, so that the outer side of the stacked silicon steel sheets 2 maintains an arc surface. In addition, the two ends of the first folding plate 91 and the second folding plate 92 can limit the position of the upper and lower groups of silicon steel sheets 2 during the stacking process, so as to prevent the upper and lower groups of silicon steel sheets 2 from being stacked too much inward during the stacking process. More, beyond the established range, when the middle group of silicon steel sheets 2 is completed stacking, by rotating the second folding plate 92, the locking groove 103 on the second folding plate 92 gradually approaches the locking rod 101 on the first folding plate 91 until the second folding plate 92 contacts the locking rod 101, and then continues to squeeze. When the second folding plate 92 continues to squeeze the locking rod 101, since the locking rod 101 is an inclined surface, the squeezed locking rod 101 is retracted into the first folding plate 91 under the action of the locking spring 102. When the locking groove 103 on the second folding plate 92 and the locking rod 101 are located at the same axis, the locking spring 102 will pop out the locking rod 101 and make the locking rod 101 stuck in the locking groove 103, so that the second folding plate 92 and the first folding plate 91 wrap the middle group of silicon steel sheets 2, thereby completing the fixation of the middle group of silicon steel sheets 2;

[0049] After completing the fixation of the middle group of silicon steel sheets 2, if the above-mentioned second transformer core assembly method is adopted, the winding needs to be put on the outside of the middle group of silicon steel sheets 2, and the lower group of silicon steel sheets 2 needs to be clamped first. When the lower group of silicon steel sheets 2 needs to be clamped, the two steel plates 3 are first located on both sides of the lower group of silicon steel sheets 2, and then the steel plate 3 with positioning plates 61 is used to insert the positioning plates 61 at both ends into the other steel plate 3 with positioning grooves 62 at both ends, so that the positioning plates 61 slide in the corresponding positioning grooves 62. The auxiliary groove 63 at one end of the positioning plate 61 can prevent the bidirectional screw 72 from affecting the normal movement trajectory of the positioning plate 61 when the positioning plate 61 passes through the bidirectional screw 72. After the positioning plate 61 is inserted into the corresponding positioning groove 62, the driving block 73 is rotated. When the driving block 73 rotates, the driving block 73 will drive the bidirectional screw 72 inside it to rotate together, and the bidirectional screw 72 When the two extrusion blocks 82 move toward their opposite sides, the two extrusion blocks 82 will be inserted into the corresponding extrusion grooves 81 through their respective inclined surfaces, so that the extrusion blocks 82 will lift the positioning plate 61, thereby gradually bringing the two steel plates 3 closer together and clamping and fixing the silicon steel sheet 2 located in the lower group;

[0050] After the silicon steel sheets 2 of the lower group are clamped and fixed by the steel plates 3, the windings of the silicon steel sheets 2 of the middle group can be sleeved. Under the action of the first and second tightening plates 91, 92, the silicon steel sheets 2 of the middle group can be prevented from tilting or spreading during the winding process, thereby improving the efficiency of the winding installation. When the installation of the windings is completed and the silicon steel sheets 2 of the upper group need to be stacked, the guide grooves 111 are respectively provided on the first and second tightening plates 91, 92, and the guide springs 113 therein control the corresponding guide plates 112 to pop out. The popped-out guide plates 112 can assist the silicon steel sheets 2 in the stacking process when the staff stacks the silicon steel sheets 2 of the upper group, thereby preventing the silicon steel sheets 2 from tilting or sliding, and ensuring that the stacking of the silicon steel sheets 2 of the upper group will not cause sliding problems, thereby affecting the stacking efficiency of the silicon steel sheets 2 of the upper group.

[0051] When the first method of assembling the transformer core is adopted, the upper group of silicon steel sheets 2 can be directly clamped according to the clamping method of the lower group of silicon steel sheets 2. This clamping method can apply clamping force to both ends of the upper group or the lower group at the same time, and will not cause angular deviation of the steel plate 3 due to rotation and fixation of a single end, thereby affecting the assembly efficiency of the core.

[0052] Example 2: Please refer to Figure 11 , the present invention provides a technical solution:

[0053] A backing plate 12 is provided at one end of the two positioning plates 61 away from the two positioning grooves 62. A plurality of bolts 13 are provided on the outside of the two backing plates 12. The two backing plates 12 are threadedly connected to the steel plate 3 through the plurality of bolts 13.

[0054] When the positioning plate 61 is subjected to excessive force from the extrusion plate, causing the positioning plate 61 to be deformed or damaged, the backing plate 12 and the positioning plate 61 on one side thereof can be removed by rotating the bolt 13, and then the positioning plate 61 and the backing plate 12 can be replaced or repaired, and the transformer core assembly work can be continued. Its function is to be able to replace and repair the damaged positioning plate 61 in time.

[0055] 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.

[0056] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An improved dry-type transformer core, comprising a base plate (1) and three groups of silicon steel sheets (2) arranged above the base plate, characterized in that: Also includes Four steel plates (3) are provided, and each two adjacent steel plates (3) of the four steel plates (3) form a group, and the two groups of steel plates (3) are respectively located on both sides of the uppermost group of silicon steel sheets (2) and the lowermost group of silicon steel sheets (2), and the four steel plates (3) are used to clamp the uppermost group of silicon steel sheets (2) and the lowermost group of silicon steel sheets (2); Two clamping assemblies (4) are provided, and the two clamping assemblies (4) are respectively provided on the two groups of steel plates (3). The two clamping assemblies (4) are used to respectively drive the two groups of steel plates (3) to move, thereby driving the two groups of steel plates (3) to clamp the corresponding silicon steel sheets (2); Three correction assemblies (5) are provided, and the three correction assemblies (5) are all provided outside the silicon steel sheets (2) in the middle group. The positions of the silicon steel sheets (2) in the middle group are adjusted by using the three correction assemblies (5), so that the positions of the silicon steel sheets (2) in the middle group are corrected after being offset during the stacking process. The correction assembly (5) includes a folding member (9) arranged on the outside of the silicon steel sheets (2) in the middle group, and the folding member (9) is used to fold the silicon steel sheets (2) in the middle group; a locking member (10) is arranged on the outside of the silicon steel sheets (2) in the middle group, and the locking member (10) is used to lock the position of the folded silicon steel sheets (2); a guiding member (11) is arranged on the outside of the silicon steel sheets (2) in the middle group, and the guiding member (11) is used to guide the installation process of the silicon steel sheets (2) in the upper group; The folding member (9) includes a first folding plate (91) arranged on the outside of the middle group of silicon steel sheets (2), and a second folding plate (92) is arranged on one end of the first folding plate (91) through a rotating shaft. The first folding plate (91) and the second folding plate (92) are both arc-shaped, and the first folding plate (91) and the second folding plate (92) are both in contact with the outside of the middle group of silicon steel sheets (2).

2. The improved dry-type transformer core according to claim 1, characterized in that: The clamping assembly (4) includes a positioning member (6) arranged on one side of the two steel plates (3), and the positioning member (6) is used to drive the two steel plates (3) to be located in the same plane during the clamping process of the silicon steel sheet (2). A driving member (7) is provided on one side of one of the two steel plates (3), and the driving member (7) is used to generate power to provide power when the two steel plates (3) are clamped. An extrusion member (8) is provided on one side of one of the two steel plates (3), and the extrusion member (8) is used to drive the two steel plates (3) to approach each other, thereby clamping the silicon steel sheet (2).

3. The improved dry-type transformer core according to claim 2, characterized in that: The positioning member (6) comprises positioning plates (61) arranged at both ends of one of the two steel plates (3), a positioning groove (62) for use with the two positioning plates (61) is provided on the other steel plate (3), and auxiliary grooves (63) are provided on one end of the two positioning plates (61) close to the two positioning grooves (62).

4. The improved dry-type transformer core according to claim 3, characterized in that: The driving member (7) includes a driving frame (71) arranged on the opposite sides of the two positioning plates (61), and the two driving frames (71) are arranged on a steel plate (3) with two positioning grooves (62). A bidirectional screw (72) is rotatably arranged on the two driving frames (71), a driving block (73) is arranged on the outside of the bidirectional screw (72), and the driving block (73) is located in the middle section of the bidirectional screw (72). The bidirectional screw (72) passes through the two positioning plates (61), and its diameter is smaller than the two auxiliary grooves (63).

5. The improved dry-type transformer core according to claim 4, characterized in that: The extrusion member (8) includes an extrusion groove (81) respectively provided on the two positioning plates (61), an extrusion block (82) for use with the two extrusion grooves (81) is provided on the outside of the bidirectional screw (72), and the two extrusion blocks (82) are both threadedly connected to the bidirectional screw (72), and the opposite sides of the two extrusion blocks (82) are both inclined surfaces. A limiting plate (83) is provided on the side of the two extrusion blocks (82) close to the steel plate (3), and a limiting groove (84) for use with the two limiting plates (83) is provided inside the steel plate (3) that is closest to the two extrusion blocks (82).

6. The improved dry-type transformer core according to claim 5, characterized in that: The locking member (10) includes a locking rod (101) slidably arranged at both ends of the first folding plate (91), and locking springs (102) are arranged at opposite ends of the two locking rods (101). The ends of the two locking springs (102) away from the two locking rods (101) are arranged on the first folding plate (91), and locking grooves (103) for use with the two locking rods (101) are opened at both ends of the second folding plate (92), and the opposite ends of the two locking rods (101) are both inclined surfaces.

7. The improved dry-type transformer core according to claim 6, characterized in that: The guide member (11) includes a guide groove (111) provided in the first folding plate (91) and the second folding plate (92), a guide plate (112) is slidably provided in the two guide grooves (111), a plurality of guide springs (113) are provided at the bottom ends of the two guide plates (112), and the ends of the plurality of guide springs (113) away from the two guide plates (112) are provided in the corresponding guide grooves (111).

8. The improved dry-type transformer core according to claim 7, characterized in that: A pad (12) is provided at one end of the two positioning plates (61) away from the two positioning grooves (62), and a plurality of bolts (13) are provided on the outside of the two pads (12). The two pads (12) are threadedly connected to the steel plate (3) through the plurality of bolts (13).

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