An oil-immersed transformer coil oil channel placing tool

Abstract

The utility model discloses a kind of oil-immersed transformer coil oil channel placement tool, including the winding seat of being installed on winding equipment, and winding seat is equipped with supporting cylinder frame and positioning mechanism;Positioning mechanism contains positioning ring, it is magnetically connected with winding seat, and the inner ring surface circumferential array has supporting strip slot, inside is equipped with the driving ring and the component such as pressing block matched supporting strip slot, supporting strip can be compressed in insulating cylinder and fixed positioning ring;Positioning ring other side is equipped with cushion block snap ring, and its disc surface circumferential array has cushion block slot;The tool can be accurately positioned when supporting strip is bonded to insulating cylinder, limit when winding copper band, realize the accurate installation of interlayer cushion block after winding, ensure vertical and horizontal oil channel uniform and stable, improve transformer coil quality, convenient and efficient operation.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing technology, and in particular to a tooling for placing the oil passage of an oil-immersed transformer coil. Background Technology

[0002] In an oil-immersed transformer, vertical oil channels are formed by the gaps between the support bars bonded to the insulating cylinder, while horizontal oil channels are formed by separating the copper strips wound on the support bars in layers through interlayer spacers. The two work together to achieve efficient heat dissipation inside the coil.

[0003] Currently, there is a lack of specialized positioning tools when bonding support bars to the insulating cylinder, and workers often rely on experience, which can easily lead to uneven spacing between the support bars, directly affecting the consistency of the flow cross-section of the vertical oil channels. At the same time, there is a lack of effective means to limit the copper strip during the winding process, which can easily cause the copper strip to shift, affecting the coil forming quality. Furthermore, the interlayer spacers are manually installed after winding, and the spacers often shift or misalign, which can cause irregular formation of horizontal oil channels. This not only affects heat dissipation but may also reduce the insulation performance of the transformer due to uneven insulation distance, thereby affecting the overall quality and service life of the transformer. Therefore, a tooling that can solve the above problems is needed. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a tooling for placing the oil passage of an oil-immersed transformer coil, thereby solving the problems mentioned in the background art.

[0005] To achieve the above technical objectives, the present invention provides a tooling for placing the oil passages of an oil-immersed transformer coil, including a winding seat installed on a winding device. The winding seat is provided with a support frame and a positioning mechanism. The positioning mechanism includes a positioning ring, the side of which is adjacent to the winding seat is magnetically attracted to it. The inner ring surface of the positioning ring has a plurality of support bar grooves arranged in a circular array. The positioning ring is provided with a clamping mechanism that cooperates with the support bar grooves. The clamping mechanism presses the support bars onto the insulating cylinder and fixes the positioning ring onto the support bars.

[0006] Furthermore, the clamping mechanism includes a drive ring and a pressure block. The inner ring of the positioning ring is provided with a clamping ring groove. The drive ring is rotatably disposed in the clamping ring groove and fixed by a locking mechanism. The inner ring surface of the drive ring is provided with a drive ring groove. The side wall of the drive ring groove is provided with an arc-shaped groove. The pressure block is L-shaped, with a drive rod adapted to the arc-shaped groove at its upper part and a support bar pressure groove with a width equal to that of the support bar groove at its lower part, and guide rods are provided on both sides of the support bar pressure groove. The side wall of the clamping ring groove is provided with a guide groove, and the length direction of the guide groove is parallel to the height direction of the pressure block.

[0007] Furthermore, a pad retaining ring is provided on the other side of the positioning ring, which is coaxial with it. One side of the pad retaining ring is fixedly connected to the positioning ring, and the other side of the pad retaining ring has a circumferential array of pad grooves. The bottom of the pad groove is provided with a through groove with the same width as the support bar groove.

[0008] Furthermore, the locking mechanism includes a push rod fixedly mounted on the drive ring, a strip-shaped through hole is provided on the outer ring surface of the positioning ring, and a plurality of positioning grooves arrayed along the length direction are provided on both sides of the strip-shaped through hole. The push rod passes through the strip-shaped through hole and is provided with a handle. A stabilizing mechanism that cooperates with the positioning groove is provided on the push rod between the handle and the drive ring.

[0009] Furthermore, the stabilizing mechanism includes a positioning plate slidably mounted on the push rod. The upper and lower surfaces of the positioning plate are respectively provided with a piston rod and a positioning block. The cross-section of the positioning block along the width direction of the strip-shaped through hole is an isosceles trapezoid, and the length of its base is greater than the width of the positioning groove. A piston sleeve that cooperates with the piston rod is provided below the handle. The piston sleeve is provided with springs at both ends that abut against the positioning plate and the handle, respectively.

[0010] Compared with the prior art, the beneficial effects of this utility model include: 1. This utility model uses the support bar groove on the inner ring surface of the positioning ring to accurately position the support bar, and combines it with related components to press and fix the support bar, effectively avoiding the problems of uneven spacing and skewed arrangement of support bars in traditional processes, ensuring that uniform vertical oil channels are formed between the support bars; at the same time, the pad block groove on the pad block retaining ring can accurately install the interlayer pad blocks, ensuring that the horizontal oil channels are distributed in a regular manner, significantly improving the heat dissipation and insulation performance of the transformer coil, and reducing safety hazards such as local overheating.

[0011] 2. This utility model uses a magnetic connection between the positioning ring and the winding seat, which facilitates quick installation and disassembly; the rotation and fixing operation of the drive ring is simple and can efficiently complete the positioning and fixing of the support bar; and the interlayer pads can be accurately placed directly through the pad slot, which simplifies the operation process, reduces the reliance on worker experience, and improves the production efficiency and quality stability of oil-immersed transformer coils. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an oil-immersed transformer coil.

[0013] Figure 2 This is a schematic diagram of a tooling for placing the oil passages of an oil-immersed transformer coil, provided by this utility model. Figure 3 This is a schematic diagram of a positioning mechanism for a tooling for placing the oil passages of an oil-immersed transformer coil, provided by this utility model. Figure 4This is an exploded view of the positioning mechanism of a tooling for placing the oil passage of an oil-immersed transformer coil, provided by this utility model. Figure 5 This is a schematic diagram of a pressure block for a tooling for placing the oil passages of an oil-immersed transformer coil, provided by this utility model. Figure 6 This is a side view schematic diagram of a tooling for placing the oil passage of an oil-immersed transformer coil provided by this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] Figure 1 For the coil structure installed on the core of an oil-immersed transformer, the inner layer is an insulating cylinder, and several support bars are laid on the insulating cylinder. Copper strips are wound on the support bars, and each layer of copper strips is separated by interlayer spacers. When the transformer is working, the gaps between the support bars form vertical oil channels, while the gaps between the copper strips separated by the interlayer spacers are horizontal oil channels.

[0016] Reference Figure 2 This utility model provides a tooling for placing the oil passage of an oil-immersed transformer coil, including a winding seat 1 installed on a winding device, a support frame 2 and a positioning mechanism 3 provided on the winding seat 1; in the non-working state, the positioning mechanism 3 is fixed to the winding seat 1 by magnetic attraction.

[0017] Reference Figure 3-5 The positioning mechanism 3 includes a positioning ring 301, which is magnetically connected to the side of the winding seat 1 adjacent to it. The inner ring surface of the positioning ring 301 has a circumferential array of several support grooves 303, the number and spacing of which can be set according to the actual coil design requirements. When installing the support bars, first place the insulating cylinder on the support cylinder frame 2, and then bond the first support bar along the length of the insulating cylinder. After bonding, move the positioning ring 301 onto the insulating cylinder, and insert the bonded support bar into the support bar groove 303. Position the remaining unbonded support bars through the other support bar grooves 303 to ensure that uniform vertical oil channels are formed between the support bars. To ensure accurate positioning, the distance between the bottom of the support bar groove 303 and the center of the positioning ring 301 is equal to the distance between the outer side of the support bar and the center of the insulating cylinder. During positioning, the bonded support bars are on top, so that the positioning ring 301 remains coaxial with the insulating cylinder under the action of gravity.

[0018] The positioning ring 301 is provided with a component that cooperates with the support bar groove 303, which can press the support bar onto the insulating cylinder and fix the positioning ring 301 onto the support bar. Specifically, these components include a drive ring 306 and a pressure block 307. The inner ring surface of the positioning ring 301 is provided with a clamping ring groove 308. The drive ring 306 is rotatably disposed in the clamping ring groove 308 and can be fixed by the corresponding component.

[0019] The inner ring surface of the drive ring 306 is provided with a drive ring groove 309, and the side wall of the drive ring groove 309 is provided with an arc-shaped groove 310. The pressure block 307 is L-shaped, with a drive rod 311 adapted to the arc-shaped groove 310 at the upper part, and a support bar pressing groove 312 with a width equal to that of the support bar groove 303 protruding from the drive ring groove 309 at the lower part. Guide rods 313 are provided on both sides of the support bar pressing groove 312. A guide groove 314 is provided on the side wall of the clamping ring groove 308, and the length direction of the guide groove 314 is parallel to the height direction of the pressure block 307.

[0020] Reference Figure 4 , Figure 6 The components for fixing the drive ring 306 include a push rod 315 fixedly mounted on the drive ring 306, a strip-shaped through hole 316 on the outer ring surface of the positioning ring 301, and a plurality of positioning grooves arranged in an array along the length direction on both sides of the strip-shaped through hole 316. The push rod 315 passes through the strip-shaped through hole 316 and is provided with a handle 317. A positioning plate 318 is slidably mounted on the push rod 315 between the handle 317 and the drive ring 306. A piston rod 320 and a positioning block are respectively provided on both sides of the positioning plate 318. 319, the positioning block 319 has an isosceles trapezoidal cross section along the width of the strip through hole 316, and its base length is greater than the width of the positioning groove. A piston sleeve 321 that cooperates with the piston rod 320 is provided below the handle 317. A spring 322 is provided on the piston sleeve 321, with its two ends respectively abutting against the positioning plate 318 and the handle 317. The included angle of the base of the positioning block 319 needs to satisfy that when the handle 317 is pushed, the vertical component of the reaction force with the side of the positioning groove is greater than the elastic force of the spring 322.

[0021] When it is necessary to fix the drive ring 306, the positioning block 319 will be locked into the positioning groove under the elastic force of the spring 322, thus locking the drive ring 306. When it is necessary to rotate the drive ring 306, push the handle 317 to make the inclined side of the positioning block 319 move relative to the side of the positioning groove. The positioning block 319 will rise and disengage from the positioning groove against the elastic force of the spring 322, and then the push rod 315 can be rotated to drive the drive ring 306 to rotate.

[0022] When the drive ring 306 is rotated, the arc groove 310 will drive the drive rod 311 to move. Under the guidance of the guide rod 313 and the guide groove 314, the pressure block 307 will move radially along the positioning ring 301, so that the support bar pressure groove 312 will press the support bar tightly onto the insulating cylinder, thereby fixing the support bar and the positioning ring 301.

[0023] On the other side of the positioning ring 301, a pad retaining ring 302 coaxial with it is provided. One side of the pad retaining ring 302 is fixedly connected to the positioning ring 301, and the other side of the pad has a circumferential array of pad grooves 304. The bottom of the pad groove 304 is provided with a through groove of the same width as the support bar groove 303 to avoid interference with the support bar. After the copper strip is wound, the interlayer pad can be accurately placed into the pad groove 304 and engaged with the support bar, thereby limiting the winding of the copper strip and preventing it from shifting during subsequent winding.

[0024] To facilitate understanding of this utility model, the following is combined with... Figure 2 - Figure 6 The working principle of this solution will be explained in detail: First, the insulating cylinder is installed on the support frame 2. The first support strip is bonded along the length of the insulating cylinder. After bonding, the positioning ring 301 is moved onto the insulating cylinder. The bonded support strip is inserted into the support strip groove 303. The remaining unbonded support strips are positioned and bonded through the other support strip grooves 303. Then, the copper strip is wound. During the winding process, the positioning ring 301 can limit the copper strip and prevent it from shifting. After winding, the interlayer spacer is placed into the spacer groove 304 of the spacer retainer 302 to complete the precise installation of the interlayer spacer, thereby ensuring the uniformity and stability of the vertical and horizontal oil channels and improving the quality of the transformer coil.

[0025] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A fixture for placing oil channels in an oil-immersed transformer coil, comprising a winding seat mounted on a winding device, wherein the winding seat is provided with a support frame and a positioning mechanism, characterized in that... The positioning mechanism includes a positioning ring, which is magnetically attracted to the side of the positioning ring adjacent to the winding seat. The inner ring surface of the positioning ring has a plurality of support grooves arranged in a circular array. The positioning ring is provided with a clamping mechanism that cooperates with the support grooves. The clamping mechanism presses the support bars onto the insulating cylinder and fixes the positioning ring onto the support bars.

2. The tooling for placing the oil passages of an oil-immersed transformer coil according to claim 1, characterized in that: The clamping mechanism includes a drive ring and a pressure block. The inner ring of the positioning ring is provided with a clamping ring groove. The drive ring is rotatably disposed in the clamping ring groove and fixed by a locking mechanism. The inner ring surface of the drive ring is provided with a drive ring groove. The side wall of the drive ring groove is provided with an arc-shaped groove. The pressure block is L-shaped. The upper part is provided with a drive rod adapted to the arc-shaped groove. The lower part protrudes from the drive ring groove and is provided with a support bar pressure groove with a width equal to that of the support bar groove. Guide rods are provided on both sides of the support bar pressure groove. The side wall of the clamping ring groove is provided with a guide groove. The length direction of the guide groove is parallel to the height direction of the pressure block.

3. The tooling for placing the oil passages of an oil-immersed transformer coil according to claim 2, characterized in that: On the other side of the positioning ring, there is a pad retaining ring coaxial with it. One side of the pad retaining ring is fixedly connected to the positioning ring, and the other side of the pad retaining ring has a circumferential array of pad grooves. The bottom of the pad groove is provided with a through groove with the same width as the support bar groove.

4. A fixture for placing the oil passages of an oil-immersed transformer coil according to claim 2 or 3, characterized in that: The locking mechanism includes a push rod fixedly mounted on the drive ring. A strip-shaped through hole is provided on the outer ring surface of the positioning ring. Several positioning grooves are arranged in an array along the length direction on both sides of the strip-shaped through hole. The push rod passes through the strip-shaped through hole and is provided with a handle. A stabilizing mechanism that cooperates with the positioning groove is provided on the push rod between the handle and the drive ring.

5. The tooling for placing the oil passages of an oil-immersed transformer coil according to claim 4, characterized in that: The stabilizing mechanism includes a positioning plate slidably mounted on the push rod. A piston rod and a positioning block are respectively provided on the upper and lower surfaces of the positioning plate. The cross-section of the positioning block along the width direction of the strip-shaped through hole is an isosceles trapezoid, and the length of its base is greater than the width of the positioning groove. A piston sleeve that cooperates with the piston rod is provided below the grip. A spring is provided on the piston sleeve, with its two ends respectively abutting against the positioning plate and the grip.

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