A coil winding device for oil immersed transformer

Abstract

The present invention discloses a coil winding device for an oil-immersed transformer, and relates to the technical field of coil winding for oil-immersed transformers, including a winding machine, a winding, and a wire arranging machine for conveying the winding wire to the winding machine, and also including a tensioning assembly and an adjusting assembly, wherein the tensioning assembly is arranged on the wire arranging machine, and the adjusting assembly is arranged on the wire arranging machine, and the winding wire in the transition area between the major axis surface and the minor axis surface is flexibly limited by the adjusting assembly, so that the winding wire at the winding arc is wound evenly. The present invention compresses and relaxes the first elastic member, and when the winding member winds the winding wire, when the winding wire is too tight, the first elastic member is compressed to store energy while preventing the problem of deformation caused by too tight winding wire.

Description

Technical Field

[0001] The invention relates to the technical field of oil-immersed transformer coil winding, and in particular to an oil-immersed transformer coil winding device. Background Art

[0002] Oil-immersed transformers are used to convert high-voltage electricity generated by power plants into low-voltage electricity suitable for users. In power systems, oil-immersed transformers generally have larger capacity and higher voltage levels. The reliability and stability of oil-immersed transformers are crucial to the safe operation of power systems. Therefore, in power systems, there are strict requirements for the design, manufacture, installation, operation and maintenance of oil-immersed transformers.

[0003] In some places where there are requirements on the spatial dimensions of the transformer, the transformer coil is often made into an oblong shape with a major axis surface and a minor axis surface. This shape of coil can better adapt to the shape of the transformer core, increase the number of coil turns within a limited space, and improve the capacity and conversion efficiency of the transformer.

[0004] However, when winding the oblong coil, due to the special shape of the oblong coil, it is more difficult to ensure the accuracy and consistency of the shape during the winding process compared to the circular coil. During the winding process, uneven tension and wear of the wire wheel will cause the wound coil to become loose, resulting in a smaller inductance value of the transformer when in use, reducing the transformer inductive reactance, causing the impedance of the transformer in the AC circuit to change, affecting the distribution of current and voltage, and causing the transformer output voltage to be unstable, causing equipment damage and increased grid losses.

[0005] Therefore, the present invention proposes an oil-immersed transformer coil winding device to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an oil-immersed transformer coil winding device, which solves the technical problems raised in the above-mentioned background technology through a tensioning component and an adjusting component.

[0007] To achieve the above object, the present invention provides the following technical solution: a coil winding device for an oil-immersed transformer, comprising a wire winder, a wire winding, and a wire arrangement device for conveying the wire winding to the wire winder, and further comprising:

[0008] A tensioning assembly, the tensioning assembly is arranged on the wire arranging device; the tensioning assembly includes a swinging member rotatably connected to the side wall of the wire arranging device, an end of the wire arranging device close to the wire winding device is fixedly connected to an extension member, a first air cylinder is hingedly connected to the extension member, a first piston is slidably connected in the first air cylinder, a first piston rod is fixedly connected to one end of the first piston, one end of the first piston rod extends out of the first air cylinder and is hinged to the swinging member, and a tensioning wheel for conveying the winding wire is arranged at one end of the swinging member away from the wire arranging device;

[0009] An adjusting component, wherein the adjusting component is arranged on the cable arranger;

[0010] The winder includes a winding part, which includes a long axis surface and a short axis surface. When the winding of the long axis surface is completed and the short axis surface is wound, the winding is tensioned by a tensioning component and the adjustment component is adjusted at the same time. The winding in the transition area between the long axis surface and the short axis surface is flexibly limited by the adjustment component, so that the winding at the winding arc is evenly wound.

[0011] Preferably, a first elastic member is disposed in the first gas cylinder, one end of the first elastic member is connected to an end of the first piston away from the first piston rod, and the other end of the first elastic member is connected to the inner bottom wall of the first gas cylinder.

[0012] Preferably, a first vent hole is formed on a side wall of one end of the first air cylinder close to the extension member, and a second vent hole is formed on a side wall of one end of the first air cylinder close to the swing member.

[0013] Preferably, an adjustment frame is provided at one end of the extension piece, a connection hole is provided on the side wall of the adjustment frame away from the extension piece, a wire wheel for conveying winding wire is provided on one side of the extension piece, and the adjustment frame is provided with a wire wheel for conveying winding wire.

[0014] Preferably, the adjustment assembly includes a support tube fixed in the connecting hole, the outer wall of the support tube is rotatably connected with a first limit member, the outer wall of the first limit member is sleeved with a second limit member, and the first limit member and the second limit member are used to limit the winding.

[0015] Preferably, the adjustment frame is fixedly connected to a second gas cylinder on one side relative to the first limit member, a second piston is slidably connected inside the second gas cylinder, one end of the second piston is fixedly connected to a second piston rod, and one end of the second piston rod extending out of the support tube is threadedly connected to a fastener.

[0016] Preferably, a second elastic member is sleeved on the outer wall of the second piston rod, one end of the second elastic member is connected to an end of the second piston close to the second piston rod, and the other end of the second elastic member is connected to the inner wall of the second cylinder.

[0017] Preferably, a third limiting member is sleeved on the outer wall of the first limiting member, one end of the third limiting member is slidably connected to one end of the second limiting member via a connecting member, and the other end of the third limiting member is movably connected to a fastener.

[0018] Preferably, a third vent hole is formed on the side wall of one end of the second air cylinder close to the adjustment frame, and a fourth vent hole is formed on the side wall of one end of the second air cylinder away from the adjustment frame. The third vent hole is connected to the second vent hole through a pipeline, and the fourth vent hole is connected to the first vent hole through a pipeline.

[0019] Preferably, the wire winder comprises a main shaft for driving the winding member to rotate, and one end of the winding wire is fixedly connected to the winding member.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention compresses and relaxes the first elastic member. When the winding member winds the winding, if the winding is too tight, the first elastic member is compressed to store energy while preventing the winding from being too tight and deformed. The winding that is about to relax is tensioned by the relaxation of the first elastic member, thereby ensuring that the winding member winds the long-axis arc and the short-axis arc of the winding loosely and unevenly, causing the inductance value of the transformer to decrease when in use, resulting in a decrease in the impedance of the transformer, resulting in a change in the resistance value of the transformer in the AC circuit, affecting the distribution of current and voltage, and causing the output voltage of the transformer to be unstable, causing damage to the equipment.

[0022] 2. The present invention relaxes the second elastic member so that when the windings in the first limiting member and the second limiting member are wound through the winding member, the second limiting member continuously limits the windings to prevent the windings wound on the winding member from having uneven spacing that is too large, causing uneven distribution of current in the coil. In areas with smaller spacing, the current density increases, which increases the resistance loss. The uneven magnetic field distribution will also cause additional eddy current loss and hysteresis loss, shortening the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the tensioning assembly of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the regulating component of the present invention.

[0026] Figure 4 It is a schematic cross-sectional view of the first gas cylinder of the present invention.

[0027] Figure 5 It is a schematic cross-sectional view of the second gas cylinder of the present invention.

[0028] Figure 6 It is a schematic cross-sectional view of the first position limiting member of the present invention.

[0029] Figure 7 This is an exploded view of the fastener of the present invention.

[0030] The accompanying drawings are marked as follows: 1. winder; 101. winding part; 1011. major axis surface; 1012. minor axis surface; 2. winding; 3. wire arranging device; 31. extension part; 32. adjustment frame; 321. connecting hole; 4. tensioning assembly; 41. swinging part; 401. tensioning wheel; 42. first air cylinder; 421. first piston; 422. first piston rod; 423. first elastic part; 424. first air vent; 425. second air vent; 5. adjustment assembly; 51. support tube; 52. first limit part; 53. second limit part; 54. second air cylinder; 541. second piston; 542. second piston rod; 543. second elastic part; 544. third air vent; 545. fourth air vent; 55. fastener; 56. third limit part. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] In the actual production process, since the oblong coil is wound with the long axis surface 1011 and the short axis surface 1012, when winding the wire 2 with the short axis surface 1012, the wire 2 is too tight, and when winding the wire 2 with the long axis surface 1011, the wire 2 is too loose, resulting in the loose and uneven winding of the arc of the long axis surface 1011 and the arc of the short axis surface 1012 of the wire 2, causing the inductance value of the transformer to decrease when in use, affecting the distribution of current and voltage, and causing the transformer output voltage to be unstable, resulting in equipment damage. This embodiment is specially invented to solve the above problems.

[0034] See also Figure 1 , an oil-immersed transformer coil winding device according to an embodiment of the present invention comprises a winding machine 1, a winding machine 2 and a wire arranging machine 3 for conveying the winding machine 1 with the winding machine 2, wherein the movement principle of the winding machine 1 and the wire arranging machine 3 can refer to a CNC lathe, which is a prior art and will not be described in detail here. It also comprises a tensioning component 4 and an adjusting component 5, wherein the tensioning component 4 is arranged on the wire arranging machine 3, and the adjusting component 5 is arranged on the wire arranging machine 3; Figure 2The tensioning assembly 4 includes a swinging member 41 rotatably connected to the side wall of the cable arranging device 3. The end of the cable arranging device 3 close to the cable winding device 1 is fixedly connected to an extension member 31. The extension member 31 is hinged with a first air cylinder 42. Figure 4 A first piston 421 is slidably connected in the first air cylinder 42, one end of the first piston 421 is fixedly connected to a first piston rod 422, one end of the first piston rod 422 extending out of the first air cylinder 42 is hinged to the swing member 41, and a tensioning wheel 401 for conveying the winding wire 2 is provided at one end of the swing member 41 away from the wire arrangement device 3;

[0035] See also Figure 2 and Figure 3 The winder 1 includes a winding member 101, and the winding member 101 includes a long axis surface 1011 and a short axis surface 1012. When the winding of the long axis surface 1011 is completed and the short axis surface 1012 is wound, the winding 2 is tensioned by the tensioning component 4 and the adjusting component 5 is adjusted at the same time. The winding 2 in the transition area between the long axis surface 1011 and the short axis surface 1012 is flexibly limited by the adjusting component 5, so that the winding 2 at the winding arc is wound evenly.

[0036] See also Figure 2 and Figure 4 A first elastic member 423 is provided in the first air cylinder 42, wherein the first elastic member 423 is a spring, one end of the first elastic member 423 is connected to the end of the first piston 421 away from the first piston rod 422, and the other end of the first elastic member 423 is connected to the inner bottom wall of the first air cylinder 42, a first vent hole 424 is provided on the side wall of the end of the first air cylinder 42 close to the extension member 31, and a second vent hole 425 is provided on the side wall of the end of the first air cylinder 42 close to the swing member 41, Figure 3 and Figure 7 An adjustment frame 32 is provided at one end of the extension member 31, a connecting hole 321 is provided on the side wall of the adjustment frame 32 away from the extension member 31, a wire wheel for conveying the winding wire 2 is provided on one side of the extension member 31, and a wire wheel for conveying the winding wire 2 is provided on the adjustment frame 32. Figure 6 The adjustment component 5 includes a support tube 51 fixed in the connecting hole 321, the outer wall of the support tube 51 is rotatably connected with a first limiting member 52, the outer wall of the first limiting member 52 is sleeved with a second limiting member 53, and the first limiting member 52 and the second limiting member 53 are used to limit the winding 2.

[0037] See also Figure 1 , Figure 3 , Figure 5 and Figure 6The second air cylinder 54 is fixedly connected to one side of the adjustment frame 32 relative to the first limiter 52, and a second piston 541 is slidably connected in the second air cylinder 54. One end of the second piston 541 is fixedly connected to a second piston rod 542, and one end of the second piston rod 542 extending out of the support tube 51 is threadedly connected to a fastener 55. The outer wall of the second piston rod 542 is sleeved with a second elastic member 543, wherein the second elastic member 543 is a spring, one end of the second elastic member 543 is connected to one end of the second piston 541 close to the second piston rod 542, and the other end of the second elastic member 543 is connected to the inner wall of the second air cylinder 54, and the outer wall of the first limiter 52 A third limiting member 56 is sleeved, one end of the third limiting member 56 is slidably connected to one end of the second limiting member 53 through a connecting member, and the other end of the third limiting member 56 is movably connected to the fastener 55. A third vent hole 544 is provided on the side wall of one end of the second air cylinder 54 close to the adjustment frame 32, and a fourth vent hole 545 is provided on the side wall of one end of the second air cylinder 54 away from the adjustment frame 32. The third vent hole 544 is connected to the second vent hole 425 through a pipeline, and the fourth vent hole 545 is connected to the first vent hole 424 through a pipeline. The winding device 1 includes a main shaft for driving the winding member 101 to rotate, and one end of the winding 2 is fixedly connected to the winding member 101.

[0038] When in use, the winding wire 2 is first transported to the tensioning wheel 401 through the wire arrangement device 3 and multiple wire wheels on the wire arrangement device 3, and then the winding wire 2 is transported to the winding member 101 through the extension member 31 and the wire wheels on the adjustment frame 32, and one end of the winding wire 2 located on the winding member 101 is fixed.

[0039] By starting the wire winder 1, the main shaft rotates, which drives the winding member 101 to rotate. Synchronously, the wire arranging device 3 moves relative to the winding member 101. The wire arranging device 3 moves while driving the extension member 31 and the adjustment frame 32 to move. When the oblong coil is wound, the winding wire 2 is tightened when the short axis surface 1012 is wound. While the wire 2 is tightened, the tensioning wheel 401 is continuously squeezed. The tensioning wheel 401 and the swinging member 41 rotate counterclockwise around the rotating axis on the wire arranging device 3. While the swinging member 41 rotates, it drives the first piston rod 422 to move in the first air cylinder 42. The first piston rod 422 While moving, the first piston 421 is driven to move in the first air cylinder 42. While the first piston 421 is moving, the first elastic member 423 is continuously squeezed. The first elastic member 423 is compressed to store energy. When winding the arc of the long axis surface 1011, the winding 2 is in a relaxed state. The first elastic member 423 is relaxed and continuously squeezes the first piston 421. While the first piston 421 is moving, the first piston rod 422 is continuously driven to move. While the first piston rod 422 is moving, the swinging member 41 is driven to rotate clockwise around the rotating axis on the wire arranger 3, and the relaxed winding 2 is tensioned by the tensioning wheel 401.

[0040] To summarize, through the compression and relaxation of the first elastic member 423, when the winding member 101 winds the winding 2, if the winding 2 is too tight, the first elastic member 423 is compressed to store energy while preventing the winding 2 from being too tight and deformed. Through the relaxation of the first elastic member 423, the winding 2 that is about to relax is tensioned, thereby ensuring that the winding member 101 is loose and uneven in winding the arc of the long axis surface 1011 and the arc of the short axis surface 1012 of the winding 2, causing the inductance value of the transformer to decrease when in use, and the transformer's resistance is reduced, resulting in a change in the resistance value of the transformer in the AC circuit, affecting the distribution of current and voltage, and causing the transformer output voltage to be unstable, causing equipment damage.

[0041] Embodiment 2

[0042] It is found during use based on the above embodiment that although the winding 2 that is about to relax is tensioned by the expansion of the first elastic member 423 to ensure that the winding member 101 is not loose and is even in winding the arc of the long axis surface 1011 and the arc of the short axis surface 1012 of the winding 2, there will be cumulative errors when the wire wheel follows the movement of the adjustment frame 32, and the wire wheel will wear out during long-term use, further causing the winding spacing of the winding 2 to be too large and uneven during winding, resulting in uneven distribution of current in the coil, and in the area with smaller spacing, the current density increases, which increases the resistance loss. This embodiment is specially invented to solve the above problems.

[0043] When used on the basis of the above embodiment, the winding 2 is placed between the first limit piece 52 and the second limit piece 53. When the winding 2 is wound by the winding piece 101, the wire arranger 3 moves while driving the extension piece 31 and the adjustment frame 32 to move. The adjustment frame 32 moves while driving the first limit piece 52 and the second limit piece 53 to move synchronously. At the same time, under the relaxation effect of the second elastic member 543, the second piston 541 is continuously squeezed, and the second piston 541 drives the second piston rod 542 to move. The second piston rod 542 moves while driving the fastener 55 to move. The fastener 55 moves while continuously squeezing the third limit piece 56. The third limit piece 56 moves while continuously squeezing the second limit piece 53, so that the second limit piece 53 slides on the outer wall of the first limit piece 52 and continuously approaches the winding 2, and continuously limits the winding 2.

[0044] To sum up, through the relaxation of the second elastic member 543, when the winding 2 in the first limiting member 52 and the second limiting member 53 is wound through the winding member 101, the second limiting member 53 continuously limits the winding 2 to prevent the winding 2 wound on the winding member 101 from having uneven spacing that is too large, causing uneven distribution of current in the coil. In areas with smaller spacing, the current density increases, which increases the resistance loss. The uneven magnetic field distribution will also cause additional eddy current loss and hysteresis loss, shortening the service life of the transformer.

[0045] Embodiment 3

[0046] It was found during actual use based on the above-mentioned embodiment that although the second elastic member 543 is relaxed so that the winding 2 in the first limiting member 52 and the second limiting member 53 is continuously limited by the second limiting member 53 when being wound through the winding member 101, thereby preventing the winding 2 wound on the winding member 101 from having excessively large and uneven spacing, there is still a problem that when the oblong coil is wound on the short axis surface 1012, the winding 2 is too tight, resulting in the winding 2 being strained and deformed at the arc of the long axis surface 1011 and the short axis surface 1012 on the winding member 101, resulting in external discharge of the winding 2 at the transition of the arc. This embodiment is specially invented to solve the above-mentioned problem.

[0047] When used on the basis of the above embodiment, when the first elastic member 423 is compressed to store energy, the gas in the first gas cylinder 42 is compressed, and the compressed gas enters the fourth gas hole 545 through the first vent hole 424 and the pipeline, and the compressed gas enters the second gas cylinder 54 through the fourth vent hole 545. The compressed gas in the second gas cylinder 54 continuously squeezes the second piston 541, and the second piston 541 continuously squeezes the second elastic member 543 while moving. The second piston 541 moves while driving the second piston rod 542 to move, and the second piston rod 542 moves while driving the fastener 55 to move, and the fastener 55 moves away from the third limit member 56. By moving the fastener 55 away from the third limit member 56, the winding 2 can squeeze the second limit member 53 when it is wound on the winding member 101. At the same time, under the compression state of the second elastic member 543, the position of the winding 2 between the first limit member 52 and the second limit member 53 is adjusted. Fine adjustment is performed to prevent the winding 2 from being stretched and deformed at the arc of the long axis surface 1011 and the short axis surface 1012 on the winding member 101 due to the winding 2 being too tight when the oblong coil is wound on the short axis surface 1012, resulting in the problem of external discharge of the winding 2 at the transition of the arc. Similarly, through the expansion of the first elastic member 423, the gas located at the second vent 425 in the first air cylinder 42 is compressed, and the compressed gas enters the third vent through the second vent 425 and the pipeline. 544, the compressed gas located in the third vent hole 544 further squeezes the second piston 541, so that the second limiter 53 further limits the winding 2 when the winding component 101 causes the long axis surface 1011 of the winding 2 to wind the winding 2, so that the winding 2 is more closely fitted to the winding component 101, and the tightness of the long axis surface 1011 and the short axis surface 1012 of the winding component 101 is further consistent when winding the winding 2, thereby further preventing the problem of the transformer inductance value becoming smaller due to the loose coil.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coil winding device for an oil-immersed transformer, comprising a winding machine (1), a winding wire (2), and a wire arrangement device (3) for conveying the winding wire (2) to the winding machine (1), characterized in that: Also includes: A tensioning assembly (4), wherein the tensioning assembly (4) is arranged on the cable arrangement device (3); The tensioning assembly (4) comprises a swinging member (41) rotatably connected to a side wall of the wire arranging device (3); an end of the wire arranging device (3) close to the wire winding device (1) is fixedly connected to an extension member (31); a first air cylinder (42) is hingedly connected to the extension member (31); a first piston (421) is slidably connected inside the first air cylinder (42); one end of the first piston (421) is fixedly connected to a first piston rod (422); one end of the first piston rod (422) extending out of the first air cylinder (42) is hingedly connected to the swinging member (41); and a tensioning wheel (401) for conveying the winding wire (2) is provided at one end of the swinging member (41) away from the wire arranging device (3); An adjustment component (5), the adjustment component (5) being arranged on the cable arrangement device (3); The winding device (1) comprises a winding member (101), wherein the winding member (101) comprises a long axis surface (1011) and a short axis surface (1012); when the winding of the long axis surface (1011) is completed and the short axis surface (1012) is wound, the winding (2) is tensioned by a tensioning component (4) and the adjusting component (5) is adjusted at the same time, and the winding (2) in the transition area between the long axis surface (1011) and the short axis surface (1012) is flexibly limited by the adjusting component (5), so that the winding (2) at the winding arc is wound evenly; An adjustment frame (32) is provided at one end of the extension member (31), and a connection hole (321) is provided on a side wall of one end of the adjustment frame (32) away from the extension member (31); The adjustment assembly (5) comprises a support tube (51) fixed in the connection hole (321); the outer wall of the support tube (51) is rotatably connected to a first limiting member (52); the outer wall of the first limiting member (52) is sleeved with a second limiting member (53); the first limiting member (52) and the second limiting member (53) are used to limit the winding (2); A second gas cylinder (54) is fixedly connected to a side of the adjustment frame (32) opposite to the first stopper (52); a second piston (541) is slidably connected inside the second gas cylinder (54); a second piston rod (542) is fixedly connected to one end of the second piston (541); and a fastener (55) is threadedly connected to one end of the second piston rod (542) extending out of the support tube (51); A third limiting member (56) is sleeved on the outer wall of the first limiting member (52), one end of the third limiting member (56) is slidably connected to one end of the second limiting member (53) via a connecting member, and the other end of the third limiting member (56) is movably connected to the fastener (55).

2. The oil-immersed transformer coil winding device according to claim 1, characterized in that: A first elastic member (423) is provided in the first gas cylinder (42); one end of the first elastic member (423) is connected to an end of the first piston (421) away from the first piston rod (422); and the other end of the first elastic member (423) is connected to the inner bottom wall of the first gas cylinder (42).

3. The oil-immersed transformer coil winding device according to claim 2, characterized in that: A first vent hole (424) is formed on a side wall of one end of the first air cylinder (42) close to the extension piece (31), and a second vent hole (425) is formed on a side wall of one end of the first air cylinder (42) close to the swing piece (41).

4. The oil-immersed transformer coil winding device according to claim 3, characterized in that: A wire wheel for conveying the winding wire (2) is provided on one side of the extension piece (31), and a wire wheel for conveying the winding wire (2) is provided on the adjustment frame (32).

5. The oil-immersed transformer coil winding device according to claim 4, characterized in that: The outer wall of the second piston rod (542) is sleeved with a second elastic member (543), one end of the second elastic member (543) is connected to an end of the second piston (541) close to the second piston rod (542), and the other end of the second elastic member (543) is connected to the inner wall of the second air cylinder (54).

6. The oil-immersed transformer coil winding device according to claim 5, characterized in that: A third vent hole (544) is formed on a side wall of one end of the second air cylinder (54) close to the adjustment frame (32), and a fourth vent hole (545) is formed on a side wall of one end of the second air cylinder (54) away from the adjustment frame (32). The third vent hole (544) is connected to the second vent hole (425) through a pipeline, and the fourth vent hole (545) is connected to the first vent hole (424) through a pipeline.

7. The oil-immersed transformer coil winding device according to claim 6, characterized in that: The wire winder (1) comprises a main shaft for driving a winding member (101) to rotate, and one end of the winding wire (2) is fixedly connected to the winding member (101).

Images