A dry-type transformer foil-wound casting coil winding tool

Abstract

The present application relates to the field of high-voltage electrical equipment manufacturing and discloses a dry-type transformer foil-wound casting coil winding tool, comprising a base, the top of which is respectively mounted with a hydraulic transmission mechanism and a bracket, the top of which is mounted with a top plate; and a pressure mechanism, which comprises a telescopic rod 1 fixedly mounted on the bottom of the top plate, the telescopic end of the telescopic rod 1 fixedly mounted with a connecting plate and a placement cylinder, the internal movable sleeve of the placement cylinder being provided with a spring and a connecting column. This device utilizes piston 1 to downwardly compress transmission fluid 2, and transmits pressure to piston 2 through transmission fluid 2, thereby causing piston 2 to produce the same upward displacement, just synchronously offsetting the distance that pressure roller 2 is pushed upward by the upper surface of the coil winding mold, maintaining the compressed stroke of the spring unchanged, that is, ensuring that the spring's rebound force remains unchanged, and maintaining the roller pressure on the outer surface of the coil winding mold constant.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage electrical equipment manufacturing, and in particular to a tool for winding a foil-wound cast coil of a dry-type transformer. Background Art

[0002] There are two ways to wind the coil of a dry-type transformer, namely wire winding and foil winding. Wire winding is easy to understand, that is, conventional coils are used for winding, while foil winding is different. Foil-wound coils are generally rectangular, and when they are unwound, they are unwound by a set of wound roller coils and wound on the coil winding mold in a winding manner. There are many winding shapes for foil-wound transformers, not only circular, but also flat rectangular. When the square shaft drives the coil winding mold to rotate, the flat rectangular coil winding mold needs a pressure roller to fix the coil and the insulating film when winding, and the foil coil is evenly pressed and wound on the coil winding mold. Therefore, the pressure roller and the coil surface The pressure roller is in contact with the coil winding mold and applies constant pressure to the coil winding mold to ensure that the coil wound on the coil winding mold can fit evenly. However, the pressure roller structure used in the prior art is simple, and it often only uses a constant pressure to press the coil. When the flat rectangular coil winding mold rotates, the distances between the points on the outside of the winding mold and its rotation axis will be different, resulting in the pressure of the pressure roller not being synchronized and uniform, which can easily affect the subsequent foil winding process. Due to the uneven force, when the number of turns of the coil winding increases, the pressure of the pressure roller on the coil winding mold will become greater and greater, which not only causes excessive pressure damage to the coil, but also hinders the winding work of the coil. Summary of the Invention

[0003] The present application proposes a dry-type transformer foil-wound casting coil winding tooling, which has the advantage of uniform force and is used to solve the technical problem of uneven force on the pressure roller in the existing technology.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a dry-type transformer foil-wound casting coil winding tool, comprising:

[0005] A base, a hydraulic transmission mechanism and a bracket are respectively installed on the top of the base, and a top plate is installed on the top of the bracket;

[0006] The pressure mechanism includes a telescopic rod 1 fixedly mounted on the bottom of the top plate, a connecting plate and a placement cylinder fixedly mounted on the telescopic end of the telescopic rod 1, a spring and a connecting column movably sleeved inside the placement cylinder, and a mounting frame 2 and a pressure roller 2 fixedly connected to the bottom end of the connecting column;

[0007] The hydraulic transmission mechanism includes two groups of fixed cylinders 1 and 2 fixedly installed on the top of the base, the internal sealing sleeve of the fixed cylinder 1 is provided with a piston 1, the top of the piston 1 is fixedly connected to a mounting frame 1 and a pressure roller 1, the internal sealing sleeve of the fixed cylinder 2 is provided with a piston 2, the top of the piston 2 is fixedly connected to a top plate, and connecting pipes 1 and 2 are installed between the fixed cylinders 1 and 2.

[0008] Preferably, the bracket includes a mounting seat 1 and a mounting seat 2 fixedly mounted on the left and right sides of the top of the base, a hinge shaft is rotatably mounted on the top of the mounting seat 1, a motor is mounted on the side of the mounting seat 1, the motor is transmission-connected to the hinge shaft, one end of the hinge shaft is hinged with a rotating shaft, a coil winding mold is mounted on the outer surface of the rotating shaft, a telescopic rod 2 support seat is fixedly mounted on the top of the mounting seat 2, a movable seat is fixedly mounted on the telescopic end of the telescopic rod 2, one end of the rotating shaft is rotatably mounted between the mounting seat 2 and the movable seat, and the interiors of the connecting pipe 1 and the connecting pipe 2 are filled with transmission fluid 2 and transmission fluid 1, respectively.

[0009] Preferably, a clamping block is fixedly connected to the top of the second mounting seat, and the clamping block is adapted to be clamped with the inner side of the movable seat.

[0010] Preferably, the pressure mechanism further comprises two groups of guide cylinders fixedly mounted on the bottom of the top plate, wherein the guide cylinders are movably sleeved with guide posts, and the bottom ends of the guide posts are fixedly connected to the connecting plate.

[0011] Preferably, the placement tubes are provided in two groups and are symmetrically distributed on both sides of the bottom of the connecting plate. The spring is compressed and arranged inside the placement tube, and the two ends of the spring are elastically connected to the connecting column and the connecting plate respectively.

[0012] Preferably, the second pressure roller is rotatably mounted inside the second mounting frame, and the first pressure roller is rotatably mounted inside the first mounting frame. The outer surfaces of the second pressure roller and the first pressure roller are in rolling contact with the outer surface of the coil winding mold, and the second pressure roller and the second mounting frame are symmetrically distributed with respect to the center of gravity with the rotation axis of the coil winding mold as the reference.

[0013] Preferably, the middle portion of the rotating shaft is in the shape of a square, and both ends of the rotating shaft are in the shape of a cylinder.

[0014] Preferably, the bottom ends of piston one and piston two are both designed to be protruding, and the inner cavity of the fixed cylinder one is divided into two upper and lower spaces that are sealed and isolated from each other by the bottom end of piston one: sealed chamber one and sealed chamber two, and the inner cavity of the fixed cylinder two is divided into two upper and lower spaces that are sealed and isolated from each other by the bottom end of piston two: sealed chamber three and sealed chamber four, and the sealed chamber one and sealed chamber three are connected through connecting tube two, and the sealed chamber two and sealed chamber four are connected through connecting tube one.

[0015] Preferably, the axial cross-section shapes of the piston 1 and the piston 2 are both "T"-shaped, and the bottom end area of ​​the piston 1 is equal to the bottom end area of ​​the piston 2.

[0016] Preferably, the movement directions of piston 1 and piston 2 are opposite, and the movement strokes are completely equal.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. This device has been redesigned to maintain a constant rolling pressure applied by roller 2 to the surface of the coil winding mold. This device utilizes a pressure mechanism to apply rolling pressure to the upper surface of the coil winding mold. The rolling pressure is generated by a spring compressed within the placement cylinder. The spring is restrained downward by a top plate, telescopic rod 1, and connecting plate. A hydraulic transmission mechanism maintains a constant distance between the connecting plate and the upper surface of the coil winding mold. As the coil winding mold rotates, the irregular design of the outer surface of the coil winding mold pushes roller 2 upward and roller 1 downward. Because rollers 2 and 1 are symmetrically designed, the upward movement of roller 2 is equal to the downward movement of roller 1. Then, piston 1 compresses transmission fluid 2 downward, transmitting pressure through transmission fluid 2 to piston 2, causing piston 2 to move upward by the same amount. This effectively offsets the distance that roller 2 is pushed upward by the upper surface of the coil winding mold, maintaining the compressed stroke of the spring constant. This ensures a constant spring rebound force and maintains a constant rolling pressure on the outer surface of the coil winding mold.

[0019] 2. The device is provided with an inner cavity of the fixed cylinder 1 and the inner cavity of the fixed cylinder 2, which are respectively sealed and filled with transmission fluid 1 and transmission fluid 2. Since the transmission fluid 1 and transmission fluid 2 are liquids and cannot be compressed, their transmission efficiency is extremely high. At the same time, since the piston 1 is limited and abutted by the pressure roller 1, the mounting frame 1 and the lower surface of the coil winding mold, when the coil winding mold is not moving, the piston 1 and the piston 2 remain fixed under the limiting action of the transmission fluid 1 and the transmission fluid 2, so that the supported top plate and the pressure mechanism remain in a stable state as a whole. Only when the coil winding mold rotates and uses the irregular design of its surface to push the pressure roller 1 downward, will the piston 1 move downward, and use the hydraulic transmission characteristics of the transmission fluid 2 and the transmission fluid 1 to automatically drive the top plate and the pressure mechanism to move upward and offset the stroke of the connecting column pushed upward by the protruding effect of the coil winding mold, so that the compressed stroke of the spring remains constant. This design makes the device more stable and more reliable.

[0020] 3. This device is provided with pressure roller 2 and pressure roller 1, both of which are in rolling contact with the outer surface of the coil winding mold, wherein pressure roller 2 applies pressure to the outer surface of the coil winding mold under the elastic force of the spring to ensure that the coil and the insulating film can be evenly wound on the outer surface of the coil winding mold, while pressure roller 1 obtains real-time data of the distance pushed by the coil winding mold to pressure roller 1 by abutting against the lower surface of the coil winding mold. When pressure roller 1 is pressed downward by the outer surface of the coil winding mold, the pressure is transmitted upward to the top plate and the pressure mechanism through piston 1, transmission fluid 2 and piston 2, so that the connecting plate moves upward synchronously to ensure that the elastic force output of the spring is constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0022] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0023] Figure 1 Schematic diagram of the separation of the pressure mechanism of the present invention;

[0024] Figure 2 This is a schematic diagram of the front appearance of the overall structure of the present invention;

[0025] Figure 3 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at A in the middle;

[0027] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 6 It is a side cutaway schematic diagram of the overall structure of the present invention;

[0029] Figure 7 Schematic diagram of the separation of the stent of the present invention;

[0030] Figure 8 Schematic diagram of the separation of the hydraulic transmission mechanism of the present invention;

[0031] Figure 9 It is a top view and cutaway schematic diagram of the overall structure of the present invention.

[0032] Among them: 1. Base; 2. Hydraulic transmission mechanism; 21. Fixed cylinder 1; 22. Piston 1; 23. Connecting pipe 1; 24. Fixed cylinder 2; 25. Piston 2; 26. Connecting pipe 2; 27. Transmission fluid 1; 28. Transmission fluid 2; 29. ​​Mounting frame 1; 210. Pressure roller 1; 3. Top plate; 4. Pressure mechanism; 41. Telescopic rod 1; 42. Connecting plate; 43. Guide cylinder; 44. Guide column; 45. Placement cylinder; 46. Spring; 47. Connecting column; 48. Mounting frame 2; 49. Pressure roller 2; 5. Coil winding mold; 6. Bracket; 61. Mounting seat 1; 62. Mounting seat 2; 621. Block; 63. Support seat; 64. Rotating axis; 65. Telescopic rod 2; 66. Moving seat; 67. Articulated shaft; 68. Motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] See also Figures 1-9 This embodiment discloses a dry-type transformer foil-wound casting coil winding tool, comprising:

[0035] A base 1, a hydraulic transmission mechanism 2 and a bracket 6 are respectively installed on the top of the base 1, and a top plate 3 is installed on the top of the bracket 6;

[0036] The pressure mechanism 4 includes a telescopic rod 41 fixedly mounted on the bottom of the top plate 3. A connecting plate 42 and a placement cylinder 45 are fixedly mounted on the telescopic end of the telescopic rod 41. A spring 46 and a connecting column 47 are movably sleeved inside the placement cylinder 45. The bottom end of the connecting column 47 is fixedly connected to a second mounting frame 48 and a second pressure roller 49.

[0037] The hydraulic transmission mechanism 2 includes two sets of fixed cylinders 1 21 and 24 fixedly mounted on the top of the base 1. The internal sealing sleeve of the fixed cylinder 1 21 is provided with a piston 1 22. The top of the piston 1 22 is fixedly connected to the mounting frame 1 29 and the pressure roller 1 210. The internal sealing sleeve of the fixed cylinder 24 is provided with a piston 25. The top of the piston 25 is fixedly connected to the top plate 3. The fixed cylinders 1 21 and 24 are connected by connecting pipes 1 23 and 26.

[0038] This device has been redesigned to keep the roller pressure of the second pressure roller 49 on the surface of the coil winding mold 5 always in a constant state. This device rolls the upper surface of the coil winding mold 5 by providing a pressure mechanism 4. The roller pressure comes from the spring 46 compressed and arranged inside the placement cylinder 45. The top plate 3, the telescopic rod 1 41 and the connecting plate 42 are used to limit the spring 46 downward. The hydraulic transmission mechanism 2 is provided to maintain a constant distance between the contact position of the connecting plate 42 and the upper surface of the coil winding mold 5. When the coil winding mold 5 rotates, the irregular design of the outer surface of the coil winding mold 5 will push the second pressure roller 49 upward. At the same time, The pressure roller 1 210 will be pushed downward. Since the pressure roller 2 49 and the pressure roller 1 210 are designed to be symmetrical, the distance that the pressure roller 2 49 moves upward is equal to the distance that the pressure roller 1 210 moves downward. Then, the piston 1 22 is used to squeeze the transmission fluid 2 28 downward, and the pressure is transmitted to the piston 2 25 through the transmission fluid 28, so that the piston 2 25 produces the same upward displacement, which just synchronously offsets the distance that the pressure roller 2 49 is pushed upward by the upper surface of the coil winding mold 5, maintaining the compressed stroke of the spring 46 unchanged, that is, ensuring that the rebound force of the spring 46 remains unchanged, so that the roller pressure on the outer surface of the coil winding mold 5 is constant.

[0039] Among them, the bracket 6 includes a mounting seat 1 61 and a mounting seat 2 62 fixedly mounted on the left and right sides of the top of the base 1, a hinge shaft 67 is rotatably mounted on the top of the mounting seat 1, a motor 68 is installed on the side of the mounting seat 1 61, the motor 68 is transmission-connected to the hinge shaft 67, one end of the hinge shaft 67 is hinged to a rotating shaft 64, the outer surface of the rotating shaft 64 is mounted with a coil winding mold 5, a telescopic rod 2 65 support seat 63 is fixedly mounted on the top of the mounting seat 2 62, a mobile seat 66 is fixedly mounted on the telescopic end of the telescopic rod 2 65, one end of the rotating shaft 64 is rotatably mounted between the mounting seat 2 62 and the mobile seat 66, and the interiors of the connecting pipe 1 23 and the connecting pipe 2 26 are filled with transmission fluid 28 and transmission fluid 1 27, respectively;

[0040] The bracket 6 is responsible for supporting the coil winding mold 5 in rotation. When the coil winding mold 5 is installed, the telescopic rod 65 can be activated to contract and drive the movable seat 66 to move toward the outside of the device, so that the rotating shaft 64 is separated from the inner wall of the support seat 63. When the coil winding mold 5 is installed to the outer surface of the rotating shaft 64, the rotating shaft 64 is reinstalled. The rotating shaft 64 is hinged to the hinge shaft 67 and can rotate with the motor 68 and the hinge shaft 67. It can also be rotated to remove the coil winding mold 5 during disassembly.

[0041] Among them, the top of the second mounting seat 62 is fixedly connected with a clamping block 621, and the clamping block 621 is adapted to be clamped with the inner side of the movable seat 66;

[0042] like Figure 7As shown, the movable seat 66 and the support seat 63 form an inner ring for the rotating shaft 64 to rotate and support. When the telescopic rod 2 65 drives the movable seat 66 to reset, in order to make the movable seat 66 reset more accurately, a clamping block 621 is provided for clamping and matching.

[0043] The pressure mechanism 4 further includes two sets of guide cylinders 43 fixedly mounted on the bottom of the top plate 3. The guide cylinders 43 are movably sleeved with guide posts 44, and the bottom ends of the guide posts 44 are fixedly connected to the connecting plate 42.

[0044] like Figure 3 As shown, the guide column 44 is movably sleeved inside the guide cylinder 43. When the number of coil turns wound on the outer surface of the coil winding mold 5 becomes larger and larger, it means that the overall size of the coil winding mold 5 becomes larger and larger. At this time, the telescopic rod 41 can be retracted upward and drive the connecting plate 42 away from the outer surface of the coil winding mold 5 to maintain a constant rebound force output of the spring 46. The guide cylinder 43 and the guide column 44 can provide a guiding function when the telescopic rod 41 drives the connecting plate 42 to move upward.

[0045] The placement tubes 45 are provided in two groups and are symmetrically distributed on both sides of the bottom of the connecting plate 42. The springs 46 are compressed and arranged inside the placement tubes 45. The two ends of the springs 46 are elastically connected to the connecting columns 47 and the connecting plate 42 respectively.

[0046] The device is provided with a pressure mechanism 4 for rolling the coil foil for the coil winding mold 5, and a telescopic rod 41 is provided to drive the connecting plate 42, and two groups of placement cylinders 45 are fixedly connected at the bottom of the connecting plate 42. The internal movable sleeve of the placement cylinder 45 is connected with a spring 46 and a connecting column 47. The mounting frame 2 48 and the pressure roller 2 49 connected to the bottom end of the connecting column 47 are rolled against the outer surface of the coil winding mold 5, and the spring 46 is compressed in the reverse direction by the connecting column 47 to generate a downward rebound force to provide the pressure roller 2 49 with the rolling pressure on the coil winding mold 5. The telescopic rod 41 is then used to move the connecting plate 42 up and down to change the relative position of the connecting plate 42 and the top of the connecting column 47, that is, to change the degree of compression of the spring 46, so that the rolling pressure on the coil winding mold 5 can be adjusted more flexibly.

[0047] The second pressure roller 49 is rotatably mounted inside the second mounting frame 48, and the first pressure roller 210 is rotatably mounted inside the first mounting frame 29. The outer surfaces of the second pressure roller 49 and the first pressure roller 210 are in rolling contact with the outer surface of the coil winding mold 5. The second pressure roller 49 and the second mounting frame 48 are symmetrically distributed with respect to the rotation axis of the coil winding mold 5.

[0048] Both pressure roller 2 49 and pressure roller 1 210 roll and abut against the outer surface of the coil winding mold 5, wherein pressure roller 2 49 applies pressure to the outer surface of the coil winding mold 5 under the elastic force of spring 46 to ensure that the coil and the insulating film can be evenly wound on the outer surface of the coil winding mold 5, while pressure roller 1 210 obtains real-time data of the distance pushed by the coil winding mold 5 to pressure roller 1 210 by abutting against the lower surface of the coil winding mold 5. When pressure roller 1 210 is pressed downward by the outer surface of the coil winding mold 5, the pressure is transmitted upward to the top plate 3 and the pressure mechanism 4 through piston 1 22, transmission fluid 2 28 and piston 2 25, so that the connecting plate 42 moves upward synchronously to ensure that the elastic force output of the spring 46 is constant.

[0049] The middle portion of the rotating shaft 64 is in the shape of a square, and both ends of the rotating shaft 64 are cylindrical;

[0050] The coil winding mold 5 is sleeved and mounted on the outer surface of the rotating shaft 64 . The square-shaped rotating shaft 64 can stably drive the coil winding mold 5 to rotate and perform subsequent foil winding operations.

[0051] The bottom ends of piston 1 22 and piston 2 25 are both protruding. The inner cavity of fixed cylinder 1 21 is divided by the bottom end of piston 1 22 into two sealed and isolated upper and lower spaces: sealed chamber 1 and sealed chamber 2. The inner cavity of fixed cylinder 24 is divided by the bottom end of piston 2 25 into two sealed and isolated upper and lower spaces: sealed chamber 3 and sealed chamber 4. Sealed chamber 1 and sealed chamber 3 are connected by connecting pipe 2 26, and sealed chamber 2 and sealed chamber 4 are connected by connecting pipe 1 23.

[0052] like Figure 3 As shown, the inner cavity of the fixed cylinder 1 21 and the inner cavity of the fixed cylinder 24 are sealed and filled with the transmission fluid 1 27 and the transmission fluid 2 28 respectively. Since the transmission fluid 1 27 and the transmission fluid 2 28 are liquids and cannot be compressed, their transmission efficiency is extremely high. At the same time, since the piston 1 22 is limited and abutted by the pressure roller 1 210, the mounting frame 1 29 and the lower surface of the coil winding mold 5, when the coil winding mold 5 is not moving, the piston 1 22 and the piston 2 25 remain fixed under the limiting action of the transmission fluid 1 27 and the transmission fluid 2 28, so that the supported top The plate 3 and the pressure mechanism 4 remain in a stable state as a whole. Only when the coil winding mold 5 rotates and uses the irregular design of its surface to push the pressure roller 210 downward, will the piston 22 move downward, and use the hydraulic transmission characteristics of the transmission fluid 28 and the transmission fluid 1 27 to automatically drive the top plate 3 and the pressure mechanism 4 to move upward and offset the upward push of the connecting column 47 caused by the protruding effect of the coil winding mold 5, so that the compressed stroke of the spring 46 remains constant. This design makes the device more stable and more reliable.

[0053] The axial cross-sections of the piston 1 22 and the piston 2 25 are both T-shaped, and the bottom end area of ​​the piston 1 22 is equal to the bottom end area of ​​the piston 2 25;

[0054] like Figure 3 As shown, the "T"-shaped design of piston 1 22 and piston 2 25 can change the direction of force under the transmission of transmission fluid 2 28 and transmission fluid 1 27. Since the bottom end area of ​​piston 1 22 is equal to the bottom end area of ​​piston 2 25, the movement strokes of piston 1 22 and piston 2 25 are equal.

[0055] Among them, the movement directions of piston 1 22 and piston 2 25 are opposite, and the movement strokes are completely equal;

[0056] like Figure 3 As shown, the downward movement of piston 1 22 is caused by the pressure of the lower surface of the coil winding mold 5 on the pressure roller 1 210, while the upper surface of the coil winding mold 5 produces an upward displacement on the pressure roller 2 49. The movement directions of piston 1 22 and piston 2 25 are opposite, so the top plate 3 can move upward with piston 2 25 to offset the upward displacement caused by the pressure roller 2 49.

[0057] Working principle:

[0058] When the device is working, first, the movable seat 66 is activated to retract and drive the movable seat 66 outward, rotating the rotating shaft 64 so that one end of the rotating shaft 64 is separated from the interior of the support seat 63, and the coil winding mold 5 is installed on the outer surface of the rotating shaft 64. The rotating shaft 64 is pushed back and rotated to be installed inside the support seat 63 again, and then the telescopic rod 65 is provided to drive the movable seat 66 to reset;

[0059] Then, the coil and the insulating film are wound around the outer surface of the coil winding mold 5, and the motor 68 is started to drive the rotating shaft 64 and the coil winding mold 5 to rotate. At this time, since the spring 46 is compressed, the rebound force generated by the spring 46 is transmitted to the coil winding mold 5 and the coil surface through the mounting frame 2 48 and the pressure roller 2 49, as shown in FIG. Figure 6 As shown, the pressure roller 2 49 rolls the outer surface of the coil winding mold 5, presses the coil and the insulating film evenly and winds them around the outer surface of the coil winding mold 5. Since the shape of the coil winding mold 5 is irregular, when the coil winding mold 5 is rotated by the rotating shaft 64, the distance between the position where the upper surface of the coil winding mold 5 and the pressure roller 2 49 abut against each other and the rotation axis of the coil winding mold 5 will change. At this time, the compression degree of the spring 46 will change, and the mounting frame 1 29 located below the coil winding mold 5 will be pushed downward under the limiting action of the lower surface of the coil winding mold 5, and press the transmission fluid 2 28 in the inner cavity of the fixed cylinder 1 21, so that the transmission fluid 28 flows to the bottom of the inner cavity of the fixed cylinder 24 through the connecting pipe 1 23, generating the same upward thrust on the piston 2 25 and generating the same stroke, as shown in FIG. Figure 3As shown, the transmission fluid 1 27 located on the upper side of the bottom end of the piston 25 flows upward and flows back to the upper side of the inner cavity of the fixed cylinder 1 21 through the connecting pipe 2 26. The piston 25 can drive the top plate 3, the telescopic rod 1 41, and the connecting plate 42 to move upward, so that the distance that the connecting plate 42 and the spring 46 move upward and the distance that the connecting column 47 is pushed upward by the upper surface of the coil winding mold 5, that is, the degree of compression of the spring 46 remains unchanged, thereby maintaining a constant roller pressure of the pressure roller 2 49 on the outer surface of the coil winding mold 5.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dry-type transformer foil-wound casting coil winding tool, characterized in that: include: A base (1), a hydraulic transmission mechanism (2) and a bracket (6) are respectively installed on the top of the base (1), and a top plate (3) is installed on the top of the bracket (6); A pressure mechanism (4) includes a telescopic rod (41) fixedly mounted on the bottom of the top plate (3), a connecting plate (42) and a placement cylinder (45) fixedly mounted on the telescopic end of the telescopic rod (41), a spring (46) and a connecting column (47) movably sleeved inside the placement cylinder (45), and a mounting frame (48) and a pressure roller (49) fixedly connected to the bottom end of the connecting column (47); The hydraulic transmission mechanism (2) comprises two groups of fixed cylinders 1 (21) and 2 (24) fixedly mounted on the top of the base (1); the inner sealing sleeve of the fixed cylinder 1 (21) is provided with a piston 1 (22); the top of the piston 1 (22) is fixedly connected to a mounting frame 1 (29) and a pressure roller 1 (210); the inner sealing sleeve of the fixed cylinder 2 (24) is provided with a piston 2 (25); the top of the piston 2 (25) is fixedly connected to a top plate (3); a connecting pipe 1 (23) and a connecting pipe 2 (26) are installed between the fixed cylinder 1 (21) and the fixed cylinder 2 (24); The pressure mechanism (4) further comprises two groups of guide cylinders (43) fixedly mounted on the bottom of the top plate (3), wherein the guide cylinders (43) are internally movably sleeved with guide posts (44), and the bottom ends of the guide posts (44) are fixedly connected to the connecting plate (42). The placement cylinders (45) are provided in two groups and are symmetrically distributed on both sides of the bottom of the connecting plate (42). The spring (46) is compressed and arranged inside the placement cylinder (45), and the two ends of the spring (46) are elastically connected to the connecting posts (47) and the connecting plate (42) respectively. The second pressure roller (49) is rotatably mounted inside the second mounting frame (48), and the first pressure roller (210) is rotatably mounted inside the first mounting frame (29). The outer surfaces of the second pressure roller (49) and the first pressure roller (210) are both in rolling contact with the outer surface of the coil winding mold (5), and the second pressure roller (49) and the second mounting frame (48) are symmetrically distributed with respect to the rotation axis of the coil winding mold (5).

2. The dry-type transformer foil-wound casting coil winding tool according to claim 1, characterized in that: The bracket (6) includes a mounting seat 1 (61) and a mounting seat 2 (62) fixedly mounted on the left and right sides of the top of the base (1), a hinge shaft (67) is rotatably mounted on the top of the mounting seat 1 (61), a motor (68) is mounted on the side of the mounting seat 1 (61), the motor (68) is transmission-connected to the hinge shaft (67), one end of the hinge shaft (67) is hinged to a rotating shaft (64), the outer surface of the rotating shaft (64) is mounted with a coil winding mold (5), a telescopic rod 2 (65) support seat (63) is fixedly mounted on the top of the mounting seat 2 (62), a movable seat (66) is fixedly mounted on the telescopic end of the telescopic rod 2 (65), one end of the rotating shaft (64) is rotationally mounted between the mounting seat 2 (62) and the movable seat (66), and the interiors of the connecting pipe 1 (23) and the connecting pipe 2 (26) are filled with transmission fluid 2 (28) and transmission fluid 1 (27), respectively.

3. The dry-type transformer foil-wound casting coil winding tool according to claim 2, characterized in that: A clamping block (621) is fixedly connected to the top of the second mounting seat (62), and the clamping block (621) is adapted to be clamped to the inner side of the movable seat (66).

4. The dry-type transformer foil-wound casting coil winding tool according to claim 3, characterized in that: The middle portion of the rotating shaft (64) is in the shape of a square, and both ends of the rotating shaft (64) are cylindrical.

5. The dry-type transformer foil-wound casting coil winding tool according to claim 4, characterized in that: The bottom ends of the piston 1 (22) and the piston 2 (25) are both designed to be protruding. The inner cavity of the fixed cylinder 1 (21) is divided into two upper and lower spaces that are sealed and isolated from each other by the bottom end of the piston 1 (22): a sealed cavity 1 and a sealed cavity 2. The inner cavity of the fixed cylinder 2 (24) is divided into two upper and lower spaces that are sealed and isolated from each other by the bottom end of the piston 2 (25): a sealed cavity 3 and a sealed cavity 4. The sealed cavity 1 and the sealed cavity 3 are connected through the connecting pipe 2 (26), and the sealed cavity 2 and the sealed cavity 4 are connected through the connecting pipe 1 (23).

6. The dry-type transformer foil-wound casting coil winding tool according to claim 5, characterized in that: The axial cross-sections of the piston 1 (22) and the piston 2 (25) are both T-shaped, and the bottom end area of ​​the piston 1 (22) is equal to the bottom end area of ​​the piston 2 (25).

7. The dry-type transformer foil-wound casting coil winding tool according to claim 6, characterized in that: The movement directions of piston 1 (22) and piston 2 (25) are opposite, and the movement strokes are completely equal.

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