A transformer winding drying constant voltage device

Abstract

The invention discloses a transformer winding drying constant pressure device, which relates to the field of transformer production, including a base and a hydraulic lifting device, wherein the top of the base is rotatably connected to a cross rotating frame, and a third motor driving the cross rotating frame to rotate is installed on the top of the base, and the four arms of the cross rotating frame are all slidably connected to a bottom block, and the bottom of the bottom block is rotatably connected to a bottom roller, and the bottom roller protrudes from the top of the bottom block. In the process of pressing the transformer winding up and down, the present invention can drive the bottom roller and the top roller to rotate and roll the top and bottom of the winding back and forth through the rotating frame and the top frame, so that the top and bottom stress points of the winding can be changed back and forth as much as possible, so that the winding is more evenly stressed, and when pressing down, the side rollers are also linked to approach the side of the extruded winding, and when the bottom roller and the top roller roll the top and bottom of the winding, the side rollers also roll the side of the winding, so as to ensure the flatness of the side of the winding, so that the winding is pressed more compactly.

Description

Technical Field

[0001] The invention relates to the field of transformer production, in particular to a transformer winding drying constant voltage device. Background Art

[0002] In the large transformer coil compression operation, the constant pressure device hydraulic system is often used. Under the action of constant compression force and dry vacuum environment, the transformer coil can be compressed to improve the mechanical strength of the winding and the stability of the box size, and enhance the winding's ability to resist short circuits. The constant pressure device hydraulic system is a professional equipment for the production of dry transformer coils.

[0003] The existing transformer winding drying constant pressure device mainly uses the up and down squeezing method to compact the coil. A gasket is usually pressed on the top of the coil, and then the gasket is squeezed at multiple points through a hydraulic device to achieve the compacting effect. In this way, the main force points of the coil are only at multiple points. The coil may cause uneven force during the drying and shrinking process, and the side of the coil may also be slightly deformed during the up and down squeezing of the coil, affecting the quality of the winding. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a transformer winding drying constant pressure device to solve the technical problems that the existing transformer winding drying constant pressure device may cause uneven force on the coil during the drying and shrinking process, and the side of the coil may also undergo slight deformation during the process of pressing the coil up and down.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transformer winding drying constant pressure device, comprising a base and a hydraulic lifting device, the top of the base is rotatably connected to a cross rotating frame, and the top of the base is equipped with a third motor that drives the cross rotating frame to rotate, the four arms of the cross rotating frame are all slidably connected to a bottom block, the inside of the bottom block is rotatably connected to a bottom roller, and the bottom roller protrudes from the top of the bottom block, the outer end of the top of the bottom block is rotatably connected to a side roller, and the top of the bottom block is provided with a space for the side roller to move left and right, the inner end of the top of the bottom block is fixedly connected to a limiting sleeve rod, and the bottom of the hydraulic lifting device is rotatably connected to a cross rotating frame, and the bottom of the bottom block is rotatably connected to a bottom roller, and the bottom roller protrudes from the top of the bottom block, and the outer end of the top of the bottom block is rotatably connected to a side roller, and the top of the bottom block is provided with a space for the side roller to move left and right, and the inner end of the top of the bottom block is fixedly connected to a limiting sleeve rod. A cross top frame is movably connected thereto, and sleeves are slidably sleeved on the four arms of the cross top frame, a top block is fixed at the end of the sleeve, a top roller is rotatably connected to the inside of the top block, and the top roller protrudes from the bottom of the top block, a guide hole matching the side roller is arranged inside the top block, a guide rod is arranged on the top of the side roller, a limiting sleeve that can be movably sleeved on the limiting sleeve rod is also fixed to the inner end of the bottom of the top block, a cushion block is fixed on the top edge of the base, a cross fixing frame is fixed on the top of the cushion block, and the cross fixing frame is staggered above the cross rotating frame, and a clamping mechanism is slidably connected to the four arms of the cross fixing frame.

[0006] By adopting the above technical scheme, the bottom roller and the top roller can be driven by the rotating frame and the top frame to rotate and roll the top and bottom of the winding back and forth, so that the top and bottom stress points of the winding can be guaranteed to change back and forth as much as possible, so that the stress on the winding is more evenly distributed. When pressing down, the side rollers will also be linked to the side of the winding to be squeezed. When the bottom roller and the top roller roll the top and bottom of the winding, the side rollers also roll the sides of the winding to ensure the flatness of the sides of the winding.

[0007] The present invention is further configured such that the clamping mechanism includes an L-shaped plate and a push plate, the L-shaped plate is provided with a slide groove, the bottom of the push plate is slidably connected in the slide groove, and the interior of the slide groove is rotatably connected with a screw rod that passes through the push plate, one end of the screw rod passes through the L-shaped plate and is connected to a knob.

[0008] By adopting the above technical solution, the transformer winding can be placed between the L-shaped plate and the push plate and clamped by the push plate.

[0009] The present invention is further configured such that a first sliding groove is provided inside the cross rotating frame, two first screw rods are rotatably connected inside the first sliding groove, a first sliding block is provided at the bottom of the bottom block to cooperate with the first sliding groove, two first sliding blocks opposing each other form a group and are threaded through by a first screw rod, a first motor is installed on the outside of the cross rotating frame to drive a first screw rod to rotate, and the intersection of the two first screw rods is transmitted through a first gear set.

[0010] By adopting the above technical solution, the synchronous movement of the four bottom blocks is achieved.

[0011] The present invention is further configured such that a second sliding groove is provided inside the cross fixing frame, two second screw rods are rotatably connected inside the second sliding groove, a second sliding block cooperating with the second sliding groove is provided at the bottom of the L-shaped plate, two second sliding blocks opposing each other form a group and are threaded through by a second screw rod, a second motor driving a second screw rod to rotate is installed on the outer side of the cross fixing frame, and the intersection of the two second screw rods is transmitted through a second gear set.

[0012] By adopting the above technical solution, the synchronous movement of the four L-shaped plates is achieved.

[0013] The present invention is further configured such that the top of the side roller is a conical structure, and the top end of the guide rod and the inner side of the guide hole are provided with mutually matching inclined surface structures.

[0014] By adopting the above technical solution, it is convenient for the side rollers to move inwards due to the extrusion force.

[0015] The present invention is further configured such that a sliding bearing is installed inside the guide hole.

[0016] By adopting the above technical solution, the friction between the side rollers and the guide holes is reduced.

[0017] The present invention is further configured such that the bottom of the cross top frame is rotatably connected to a suspension arm.

[0018] By adopting the above technical solution, the placement of the transformer winding can be assisted.

[0019] The present invention is further configured such that a plurality of rollers are installed at the bottom of the cross rotating frame, and the rollers are in contact with the top of the base.

[0020] By adopting the above technical solution, the friction between the cross rotating frame and the base is reduced.

[0021] The present invention is further configured such that the top intersection of the cross rotating frame and the bottom intersection of the cross fixing frame are rotatably connected via a rotating bearing.

[0022] By adopting the above technical solution, the rotation of the cross rotating frame is made more stable.

[0023] In summary, the present invention mainly has the following beneficial effects:

[0024] In the process of pressing the transformer winding up and down, the present invention can drive the bottom roller and the top roller to rotate back and forth and roll the top and bottom of the winding through the rotating frame and the top frame, so as to ensure that the top and bottom stress points of the winding change back and forth as much as possible, so that the stress on the winding is more uniform. When pressing down, the side rollers are also linked to the side of the winding for squeezing. When the bottom roller and the top roller roll the top and bottom of the winding, the side rollers also roll the side of the winding to ensure the flatness of the side of the winding, so that the winding is pressed more compactly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 For the present invention Figure 1 Another perspective of the picture;

[0027] Figure 3 is a cross-sectional view of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the main part of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the pressing part of the present invention;

[0030] Figure 6 For the present invention Figure 5 Another perspective of the picture;

[0031] Figure 7 It is a schematic diagram of the cooperation between the rotating frame and the bottom block of the present invention;

[0032] Figure 8 For the present invention Figure 7 A cross-sectional view of

[0033] Fig. 9 It is a structural schematic diagram of the fixing frame of the present invention;

[0034] Fig.10 It is a schematic diagram of the cooperation between the top block and the side rollers of the present invention.

[0035] In the figure: 1, base; 2, cross rotating frame; 3, bottom block; 4, bottom roller; 5, hydraulic lifting device; 6, cross top frame; 7, sleeve; 8, top block; 9, top roller; 10, guide hole; 11, side roller; 12, limit sleeve; 13, cushion block; 14, cross fixing frame; 15, L-shaped plate; 16, push plate; 17, roller; 18, boom; 19, guide rod; 20, sliding bearing; 21, first sliding groove; 22, first screw rod; 23, first slider; 24, first motor; 25, first gear set; 26, second sliding groove; 27, second screw rod; 28, second slider; 29, second motor; 30, second gear set; 31, rotating bearing; 32, third motor; 33, sliding groove; 34, screw rod; 35, limit sleeve rod. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The following describes an embodiment of the present invention based on its overall structure.

[0038] A transformer winding drying constant voltage device, such as Figure 1-10As shown: it includes a base 1 and a hydraulic lifting device 5, the hydraulic lifting device 5 is installed on the outer frame, the top of the base 1 is rotatably connected to a cross rotating frame 2, and the top of the base 1 is installed with a third motor 32 for driving the cross rotating frame 2 to rotate, the four arms of the cross rotating frame 2 are all slidably connected to a bottom block 3, the bottom of the bottom block 3 is rotatably connected to a bottom roller 4, and the bottom roller 4 protrudes from the top of the bottom block 3, the inner end of the top of the bottom block 3 is fixedly connected to a limited sleeve rod 35, the bottom of the hydraulic lifting device 5 is rotatably connected to a cross top frame 6, and the cross top frame 6 is rotatably connected to the bottom of the bottom block 3. The four arms of the top frame 6 are all slidably sleeved with sleeves 7, the end of the sleeve 7 is fixed with a top block 8, the inside of the top block 8 is rotatably connected with a top roller 9, and the top roller 9 protrudes from the bottom of the top block 8, and the inner end of the bottom of the top block 8 is also fixed with a limit sleeve 12 that can be movably sleeved on the limit sleeve rod 35, a cushion block 13 is fixed to the top edge of the base 1, a cross fixing frame 14 is fixed to the top of the cushion block 13, and the cross fixing frame 14 is located above the cross rotating frame 2 and staggered, and the four arms of the cross fixing frame 14 are all slidably connected with a clamping mechanism.

[0039] When in use, the hydraulic lifting device 5 raises the cross frame 6, places the transformer winding in the clamping mechanism for clamping and fixing, and then the hydraulic lifting device 5 drives the cross frame 6 to move downward, the limit sleeve 12 will be movably sleeved on the limit sleeve rod 35, and the device is moved to a dry vacuum environment. When the top roller 9 at the bottom of the top block 8 contacts the top of the winding, the hydraulic lifting device 5 generates a constant pressure downward, squeezes the winding through the top roller 9, and the bottom of the winding contacts the bottom roller 4 at the top of the bottom block 3. The pressure applied by the winding to the bottom roller 4 reacts Used at the bottom of the winding, so that the four top rollers 9 and the four bottom rollers 4 can apply a vertical extrusion pressure to the winding. During this process, the third motor 32 drives the cross rotating frame 2 to rotate back and forth in the neutral position of the cross fixed frame 14, and the cross rotating frame 2 drives the cross top frame 6 to rotate through the limiting sleeve rod 35 and the limiting sleeve 12, thereby driving the bottom block 3 and the top block 8 to move back and forth, thereby driving the bottom roller 4 and the top roller 9 to roll back and forth at both ends of the winding, and the top and bottom force points of the winding change back and forth, so that the winding is more evenly stressed.

[0040] Furthermore, the present invention also has a side roller 11 movably connected to the outer end of the top of the bottom block 3, a guide hole 10 cooperating with the side roller 11 is provided inside the top block 8, and a guide rod 19 is provided on the top of the side roller 11. The top of the guide rod 19 and the inner side of the guide hole 10 are provided with a mutually cooperating inclined surface structure. When the top block 8 moves downward, the inclined surface inside the guide hole 10 squeezes the inclined surface of the top end of the guide rod 19, thereby guiding the side roller 11 into the guide hole 10. The top of the side roller 11 is a conical structure, which also facilitates the side roller 11 to slide into the guide hole 10. There is space for the side roller 11 to move left and right on the top of the bottom block 3. When sliding into the guide hole 10, the side roller 11 moves inward, which will make the side roller 11 contact with the side of the winding, so that when the cross rotating frame 2 rotates, it will also drive the side roller 11 to roll back and forth on the outside of the winding, thereby pressing the side of the winding.

[0041] The clamping mechanism includes an L-shaped plate 15 and a push plate 16. A slide groove 33 is provided on the L-shaped plate 15. The bottom of the push plate 16 is slidably connected in the slide groove 33, and the inside of the slide groove 33 is rotatably connected with a screw rod 34 that passes through the push plate 16 through a thread. One end of the screw rod 34 passes through the L-shaped plate and is connected to a knob. The winding is placed in the interlayer formed by the L-shaped plate 15 and the push plate 16. Turning the knob drives the screw rod 34 to rotate, and the screw rod 34 drives the push plate 16 to move back and forth, so that windings of different thicknesses can be clamped.

[0042] A first sliding groove 21 is provided inside the cross rotating frame 2, and two first screw rods 22 are rotatably connected inside the first sliding groove 21. A first sliding block 23 cooperating with the first sliding groove 21 is provided at the bottom of the bottom block 3. The two first sliding blocks 23 opposing each other form a group and are threaded through by a first screw rod 22. A first motor 24 that drives a first screw rod 22 to rotate is installed on the outer side of the cross rotating frame 2. The intersection of the two first screw rods 22 is transmitted through a first gear set 25. The first motor 24 drives the first screw rod 22 to rotate. The two first screw rods 22 synchronously drive the four bottom blocks 3 to adjust their positions on the cross rotating frame 2, so as to adapt to windings of various outer diameters. When the bottom block 3 moves on the cross rotating frame 2, the limit sleeve rod 35 and the limit sleeve 12 drive the top block 8 to move synchronously, and the top block 8 slides on the cross top frame 6 through the sleeve 7 to move.

[0043] A second sliding groove 26 is provided inside the cross fixing frame 14, and two second screw rods 27 are rotatably connected inside the second sliding groove 26. A second slider 28 cooperating with the second sliding groove 26 is provided at the bottom of the L-shaped plate 15. The two second sliders 28 opposing each other form a group and are threaded through by a second screw rod 27. A second motor 29 driving a second screw rod 27 to rotate is installed on the outer side of the cross fixing frame 14. The intersection of the two second screw rods 27 is transmitted through a second gear set 30. The second motor 29 drives the second screw rod 27 to rotate, and the two second screw rods 27 synchronously drive the four L-shaped plates 15 to slide and adjust their positions on the cross fixing frame 14, so as to adapt to windings with various outer diameters.

[0044] A plurality of rollers 17 are installed at the bottom of the cross rotating frame 2, and the rollers 17 are in contact with the top of the base 1. When the cross rotating frame 2 rotates, the rollers 17 rotate on the top of the base 1 to provide support for the cross rotating frame 2 and reduce friction with the base 1. The top intersection of the cross rotating frame 2 and the bottom intersection of the cross fixed frame 14 are rotatably connected through a rotating bearing 31, so that the rotation of the cross rotating frame 2 is more stable.

[0045] A sliding bearing 20 is installed inside the guide hole 10 to reduce the friction between the side roller 11 and the guide hole 10 .

[0046] The bottom of the cross top frame 6 is rotatably connected to a hanging arm 18. When placing the winding, the hanging arm can be rotated out and used to assist in placing the winding. The side roller 11 and the bottom block 3 can also be set as a detachable structure. When placing the winding, the side roller 11 is first removed. After the winding is placed, the side roller 11 is installed, which can also facilitate the placement of the winding.

[0047] After use, the hydraulic lifting device 5 drives the cross top frame 6 to move upward, and the clamping mechanism is released to take out the winding.

[0048] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A transformer winding drying constant pressure device, comprising a base (1) and a hydraulic lifting device (5), characterized in that: The top of the base (1) is rotatably connected to a cross rotating frame (2), and a third motor (32) is installed on the top of the base (1) to drive the cross rotating frame (2) to rotate. The four arms of the cross rotating frame (2) are all slidably connected to a bottom block (3). The inside of the bottom block (3) is rotatably connected to a bottom roller (4), and the bottom roller (4) protrudes from the top of the bottom block (3). The outer end of the top of the bottom block (3) is rotatably connected to a side roller (11), and a space for the side roller (11) to move left and right is provided at the top of the bottom block (3). The inner end of the top of the bottom block (3) is fixedly connected to a limiting sleeve rod (35). The bottom of the hydraulic lifting device (5) is rotatably connected to a cross top frame (6), and the four arms of the cross top frame (6) are all slidably sleeved with sleeves (7 ), a top block (8) is fixed at the end of the sleeve (7), a top roller (9) is rotatably connected inside the top block (8), and the top roller (9) protrudes from the bottom of the top block (8), a guide hole (10) is arranged inside the top block (8) to cooperate with the side roller (11), a guide rod (19) is arranged on the top of the side roller (11), and a limiting sleeve (12) which can be movably sleeved on the limiting sleeve rod (35) is also fixed to the inner end of the bottom of the top block (8), a cushion block (13) is fixed on the top edge of the base (1), a cross fixing frame (14) is fixed on the top of the cushion block (13), and the cross fixing frame (14) is located above the cross rotating frame (2) and is staggered, and the four arms of the cross fixing frame (14) are all slidably connected with a clamping mechanism.

2. A transformer winding drying constant voltage device according to claim 1, characterized in that: The clamping mechanism comprises an L-shaped plate (15) and a push plate (16), wherein a slide groove (33) is arranged on the L-shaped plate (15), the bottom of the push plate (16) is slidably connected in the slide groove (33), and a screw rod (34) which is threadedly penetrated through the push plate (16) is rotatably connected inside the slide groove (33), and one end of the screw rod (34) penetrates through the L-shaped plate and is connected to a knob.

3. A transformer winding drying constant voltage device according to claim 1, characterized in that: A first sliding groove (21) is provided inside the cross rotating frame (2), and two first screw rods (22) are rotatably connected inside the first sliding groove (21). A first sliding block (23) cooperating with the first sliding groove (21) is provided at the bottom of the bottom block (3), and the two first sliding blocks (23) opposite to each other form a group and are threadedly penetrated by a first screw rod (22). A first motor (24) for driving a first screw rod (22) to rotate is installed on the outer side of the cross rotating frame (2), and the intersection of the two first screw rods (22) is transmitted through a first gear set (25).

4. A transformer winding drying constant voltage device according to claim 2, characterized in that: A second sliding groove (26) is provided inside the cross fixing frame (14), and two second screw rods (27) are rotatably connected inside the second sliding groove (26). A second sliding block (28) cooperating with the second sliding groove (26) is provided at the bottom of the L-shaped plate (15), and two second sliding blocks (28) opposite to each other form a group and are threadedly penetrated by a second screw rod (27). A second motor (29) for driving a second screw rod (27) to rotate is installed on the outer side of the cross fixing frame (14), and the intersection of the two second screw rods (27) is transmitted through a second gear set (30).

5. A transformer winding drying constant voltage device according to claim 1, characterized in that: The top of the side roller (11) is a conical structure, and the top of the guide rod (19) and the inner side of the guide hole (10) are provided with mutually matching inclined surface structures.

6. A transformer winding drying constant voltage device according to claim 1, characterized in that: A sliding bearing (20) is installed inside the guide hole (10).

7. A transformer winding drying constant voltage device according to claim 1, characterized in that: The bottom of the cross top frame (6) is rotatably connected to a suspension arm (18).

8. A transformer winding drying constant voltage device according to claim 1, characterized in that: A plurality of groups of rollers (17) are installed at the bottom of the cross rotating frame (2), and the rollers (17) are in contact with the top of the base (1).

9. A transformer winding drying constant voltage device according to claim 1, characterized in that: The top intersection of the cross rotating frame (2) and the bottom intersection of the cross fixing frame (14) are rotatably connected via a rotating bearing (31).

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