CN116741517A - Transformer body compression tool and application method - Google Patents

Abstract

The invention discloses a transformer body compression tooling and a method of use. The transformer body compression tooling includes two first toolings. The low-voltage side clamp and the high-voltage side clamp are both connected to one first tooling; the low-voltage side clamp The first tooling on the iron core and the first tooling on the high-voltage side clamp are connected through the second tooling; the second tooling is connected to a third tooling on both sides of the core, and the length of the third tooling is equal to the length of the low-voltage side clamp and the The size of the high-voltage side clamp matches; the tops of the first tooling and the third tooling are both provided with chutes that match the second tooling, and the tops of the first tooling and the tops of the third tooling are both slidingly connected to the second tooling . By applying external force to the third tooling, the present invention enables the high-pressure side clamp and the low-pressure side clamp to receive force evenly at the same time, thereby reducing the force on the pressure plate of the body. By working simultaneously at six pressing points, compared with the conventional four With point compression, the coil pressure plate is more evenly stressed and the coil compression effect is better.

Description

A transformer body compression tooling and its use method

Technical field

The invention relates to the technical field of transformer manufacturing, and in particular to a transformer body pressing tool and a method of use.

Background technique

In the manufacturing process of large power transformers, the transformer body needs to be compressed. Conventional four-point compression has a large relative distance between each compression point, and the coil pressure plate needs to withstand high strength. Moreover, the uneven pressure on the coil pressure plate will cause the coil to be unevenly stressed, and the coil compression effect is not good. In the existing four-point compression method, when the transformer body is large, the angle between the four compression points is 90°, the distance between the compression points is large, and the transformer body is tight. During the process, the pressing point of the coil pressure plate is stressed. Moreover, during four-point compression, it is necessary to weld the angle plate for compression on the clamp. When compressing, the jack needs to be on the welded corner plate, which will test the strength of the corner plate and the welding seam of the corner plate.

The patent publication number is CN115497734A, which is a patent application for a transformer body pressing tooling structure and method. It discloses a transformer body pressing tooling structure and method, including a connecting part and an installation part. The connecting part is provided with a The connection surface connected to the clamp web; the height of the connection part is less than the distance between the clamp web and the body pressure plate of the transformer; the installation part is located on one side of the connection part and above the body pressure plate; the installation part Extending in the direction away from the connecting part, an installation space for installing the hydraulic device is formed between the mounting part and the connecting part, and the distance between the mounting part and the body pressure plate is greater than the height of the hydraulic device. This patent application can overcome the problem of limited axial compression height and avoid the problem of excessive concentration in the radial area of the body. However, this patent application cannot solve the problem of uneven stress when the transformer coil is compressed.

Contents of the invention

In order to overcome the above-mentioned problems existing in the prior art, the object of the present invention is to provide a six-point pressing fixture structure and method for a transformer body. Through the use of tooling connections, six-point compression of the body is achieved, making the force on the pressure plate of the body more uniform and reducing the force on the pressure plate of the body.

In order to achieve the above objects, the technical solution adopted by the present invention is:

A transformer body compression tooling. The transformer body compression tooling includes two first toolings. One first tooling is connected to both the low-voltage side clamp and the high-voltage side clamp; the first tooling is connected to the low-voltage side clamp. The first tooling on the tooling and the high-voltage side clamp is connected through a second tooling; the second tooling is connected to a third tooling on both sides of the core, and the length of the third tooling is equal to the length of the low-voltage side clamp and the high-voltage side clamp. The size of the side clamps matches; the tops of the first tooling and the third tooling are both provided with chute that matches the second tooling, and the tops of the first tooling and the third tooling are The tops are all slidingly connected to the second tooling.

Optionally, two jacks are placed at the bottoms of the low-pressure side clamp and the high-pressure side clamp, and the first tooling on the low-pressure side clamp is at the midpoint of the two jacks of the low-pressure side clamp; the high-pressure clamp The first tool on the side clamp is located at the midpoint of the two jacks of the high-pressure side clamp; both the low-pressure side clamp and the high-pressure side clamp are perpendicular to the second tool.

Optionally, the cross section of the slide groove of the first tool along the axial direction is the same as the cross section of the slide groove of the third tool along the axial direction.

Optionally, the first tooling includes a top connecting groove and a bottom connecting piece that are connected to each other, and the top connecting groove is slidingly connected to the second tooling; between the bottom connecting piece and the web of the low-pressure side clamp , the bottom connecting piece and the web of the high-voltage side clamp are connected through fasteners.

Optionally, the second tooling is an I-shaped cross-section rod.

Optionally, the third tooling includes a top connecting piece, a middle rod and a bottom pad, wherein the top connecting piece is provided with a chute that matches the second tooling and is slidably connected to the second tooling, One end of the middle rod is connected to the top connecting piece, and the other end is connected to the bottom pad.

Optionally, a jack is placed at the bottom of the third tool.

Optionally, the bottom of the third tooling is in the same height plane as the bottom of the low-pressure side clamp and the bottom of the high-pressure side clamp.

Optionally, the third tooling is arranged on the outside of the first tooling away from the iron core, and the third tooling is arranged symmetrically with respect to the iron core.

The method of using the transformer body compression tooling includes the following steps:

Place two jacks at the bottom of both the low-pressure side clamp and the high-pressure side clamp;

Adjust the third tooling to directly above the pressing point;

Place a jack at the bottom of the third tool;

Make all jacks in just contact with the upper low-pressure side clamp, high-pressure side clamp and the third tool;

Pressurize six jacks simultaneously.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention uses the first tool to fix the high-pressure side clamp and the low-pressure side clamp respectively, and connects the first tool of the high-pressure side clamp and the first tool of the low-pressure side clamp through the second tool, so that the high-pressure side clamp The clamp and the low-pressure side clamp can bear force together. At the same time, in the present invention, a third tool is connected to both sides of the second tool on the iron core. The length of the third tool matches the size of the clamp on the corresponding side. By applying external force to the third tool, the third tool can be used to clamp the iron core. The external force is transmitted to the second tooling, and then transmitted from the second tooling to the first tooling, so that the high-pressure side clamp and the low-pressure side clamp can be evenly stressed at the same time, reducing the force on the body pressure plate, and based on this At the same time, the conventional four-point compression method is used. Four jacks are placed at the bottom of the clamps on both sides of the iron core, and the six compression points work simultaneously to make the body pressure plate evenly stressed. Compared with the conventional four-point compression, the coil pressure plate is more evenly stressed and the coil compression effect is better. At the same time, the first tooling and the second tooling of the present invention can be slidably adjusted to meet the requirements of coils of different sizes, and the third tooling and the second tooling of the invention can be slidably adjusted to facilitate the determination of the pressing point. Make position adjustments.

Furthermore, the second tooling of the present invention is an I-shaped cross-section rod, and the flat plate at the lower part of the I-shaped cross-section can provide a sliding track for the first tooling and the third tooling, and can facilitate sliding connection with the first and third tooling, and The I-shaped cross-section provides higher strength and avoids breakage during compression. The I-shaped cross-section can prevent the tooling from deforming after long-term use, causing the second tooling to be scrapped.

Furthermore, the third tooling of the present invention has a bottom pad, which can facilitate cooperation with the jack.

Furthermore, the cross section of the chute along the axial direction of the first tool of the present invention is the same as the cross section of the chute of the third tool along the axial direction, so that the first tool and the third tool can simultaneously receive the force exerted by the jack.

Description of drawings

The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of each component in the figures are only schematic and are used to help the understanding of the present invention, and are not intended to specifically limit the shapes and proportional dimensions of each component of the present invention. In the attached picture:

Figure 1 is a top view of the present invention;

Figure 2 is a side view of the present invention;

Figure 3 is a front view of the present invention;

Figure 4 is a front view of the first tooling of the present invention;

Figure 5 is a side view of the first tooling of the present invention;

Figure 6 is a front view of the third tooling of the present invention;

Figure 7 is a side view of the third tooling device of the present invention;

Among them, 1-jack, 2-iron core, 3-coil pressure plate, 4-low voltage side clamp, 5-high voltage side clamp, 6-sleeper, 7-first tooling, 8-second tooling, 9-third tooling , 71-top connection slot, 72-bottom connection piece, 91-top connection piece, 92-middle rod, 93-bottom pad.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of the present invention.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent exclusive embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 3, a transformer body pressing tool of the present invention is arranged on the clamps on both sides of the core 2 of the transformer. Among them, the two clamps include a low-voltage side clamp 4 and a high-voltage side clamp 5. Both clamps are tangent to the core 2, and the low-voltage side clamp 4 and the high-voltage side clamp 5 are parallel to each other. Two jacks 1 are placed at the bottoms of the low-pressure side clamp 4 and the high-pressure side clamp 5, and the four jacks 1 are located at the four corner points of a rectangle. Specifically, the four jacks 1 are located at the four corner points of a rectangle in plan layout. The jacks 1 are all arranged on the coil pressure plate 3, and sleepers 6 are laid on the bottoms of the jacks 1.

A transformer body pressing tool of the present invention includes two first tools 7, a second tool 8 and two third tools 9. A first tool 7 is connected to both the low-pressure side clamp 4 and the high-pressure side clamp 5; the first tool 7 on the low-voltage side clamp 4 and the first tool 7 on the high-pressure side clamp 5 are connected through a second tool 8. Connection; the second tool 8 is located on both sides of the core 2 and is connected to a third tool 9 .

Both the low-pressure side clamp 4 and the high-pressure side clamp 5 are perpendicular to the second tool 8 . The first tool 7 on the low-pressure side clamp 4 is located at the midpoint of the two jacks 1 of the low-pressure side clamp 4; the first tool 7 on the high-pressure side clamp 5 is located on both sides of the high-pressure side clamp 5. at the midpoint of jack 1.

As shown in FIGS. 4 and 5 , the first tool 7 includes a top connecting groove 71 and a bottom connecting piece 72 that are connected to each other. The second tool 8 is an I-shaped cross-section rod. The top connecting groove 71 of the first tool 7 matches and is slidingly connected with the second tool 8. For coils of different sizes, the positions of the first tool and the third tool can be adjusted accordingly. , able to adapt to coils of different sizes. Optionally, the top connection groove 71 and the bottom connection piece 72 are integrally formed. Specifically, the top connecting groove 71 and the bottom connecting piece 72 are both cast iron parts.

The bottom connecting piece 72 and the web of the low-pressure side clamp 4 and the bottom connecting piece 72 and the web of the high-pressure side clamp 5 are connected by fasteners. Optionally, the fastener is a combination of screws and nuts. Optionally, the fastener is a combination of screws, nuts and washers. Specifically, the bottom connector 72 is a plate member, and the clamp is provided with a screw hole, and the bottom connector 72 is provided with a screw hole that matches the screw hole on the clamp. A screw is provided in the screw hole, the screw passes through the screw hole of the bottom connector 72 and the screw hole of the clamp, and a nut is installed at the end of the screw.

As shown in FIGS. 6 to 7 , the third tooling 9 includes a top connecting piece 91 , a middle rod 92 and a bottom pad 93 . The top connecting piece 91 is provided with a sliding plate that matches the second tooling 8 . The middle rod 92 is connected to the top connecting piece 91 at one end and the bottom pad 93 at the other end. Specifically, the diameter of the bottom pad 93 is larger than the diameter of the middle rod 92 and larger than the diameter of the jack 1 so as to match the jack 1 at the bottom.

Optionally, the top connecting piece 91 , the middle rod 92 and the bottom pad 93 are connected by welding. Specifically, the top connecting piece 91 is made of cast iron; the middle rod 92 is made of round steel. Preferably, the bottom pad 93 is a steel plate pad or a wooden pad. The bottom pad 93 can disperse the force of the jack and share it with the body pressure plate. The bottom of the third tool 9 is in the same height plane as the bottom of the low-pressure side clamp 4 and the bottom of the high-pressure side clamp 5 . Preferably, the third tooling 9 is arranged on the outer side of the first tool 7 away from the core 2 and the third tooling 9 is arranged symmetrically with respect to the center of the core 2 .

The transformer body compression tooling of the present invention, when used, includes the following steps:

Make a hole in the corresponding position of the web of the clamp, and the size of the hole matches the hole in the first tool 7 . Install the first tool 7 on the web of the clamp and tighten the bolts. Pass the second tool 8 through the top connecting groove 71 of the first tool 7 , and then install the top connecting piece 91 of the third tool 9 on the second tool 8 . Adjust the position of the third tool 9 so that it is directly above the point that needs to be pressed. Check and check the selected position of the pressing point. If it is unreasonable, readjust it.

Place the two jacks 1 and the sleepers 6 at the compression point below the third tool 9 to prevent damage due to excessive force during the compression process.

Place the jacks 1 and sleepers 6 at the bottom of the four clamps at the compression points under the webs of the clamps. The jacks 1 at the bottom of the four clamps are at the four corner points of a rectangle.

Before compressing the machine body, first determine the six compression point positions according to the diameter of the machine body, combined with the compression radius, the size of the jack 1 and the actual operating space. Among them, the distance between the three compression point positions of the same clamp is equal. , and the positions of the pressing points of the clamps on both sides are symmetrically distributed about the center of the core 2.

Make all the jacks 1 in just contact with the upper low-pressure side clamp 4, high-pressure side clamp 5 and the third tool 9, so that the six pressing points are evenly stressed at the same time.

Finally, pressurize the six jacks 1 at the same time, slowly increase the pressure, and compress the coil to a suitable height. After completion, remove the jack 1 and the transformer body compression tooling and remove them.

Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components. Unless otherwise specified, the structural settings, working methods or control methods involved are conventional settings, working methods or control methods in this field. control method.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Those of ordinary skill in the art may make other modifications or equivalent substitutions to the technical solutions of the present invention, as long as they do not deviate from the spirit and scope of the technical solutions of the present invention. The scope should be covered by the claims of the present invention.

Claims (10)

1. The transformer body pressing tool is characterized by comprising two first tools (7), wherein the first tools (7) are connected to the low-voltage side clamping piece (4) and the high-voltage side clamping piece (5); the first fixture (7) on the low-pressure side clamping piece (4) is connected with the first fixture (7) on the high-pressure side clamping piece (5) through the second fixture (8); the second tooling (8) is connected with a third tooling (9) at two sides of the iron core (2), and the length of the third tooling (9) is matched with the sizes of the low-pressure side clamping piece (4) and the high-pressure side clamping piece (5); the top of first frock (7) with third frock (9) all be provided with second frock (8) assorted spout, just the top of first frock (7) with the top of third frock (9) all with second frock (8) sliding connection.

2. A transformer body pressing tool according to claim 1, characterized in that two jacks (1) are placed at the bottoms of the low-voltage side clamping piece (4) and the high-voltage side clamping piece (5), and the first tool (7) on the low-voltage side clamping piece (4) is positioned at the middle point of the two jacks (1) of the low-voltage side clamping piece (4); the first tool (7) on the high-pressure side clamping piece (5) is positioned at the middle point of the two jacks (1) of the high-pressure side clamping piece (5); the low-pressure side clamping piece (4) and the high-pressure side clamping piece (5) are perpendicular to the second tool (8).

3. A transformer body pressing tool according to claim 1, characterized in that the cross section of the chute of the first tool (7) in the axial direction is the same as the cross section of the chute of the third tool (9) in the axial direction.

4. A transformer body pressing fixture according to claim 1, characterized in that the first fixture (7) comprises a top connecting groove (71) and a bottom connecting piece (72) connected to each other, the top connecting groove (71) being slidingly connected to the second fixture (8); the bottom connecting piece (72) is connected with the web of the low-pressure side clamping piece (4) and the bottom connecting piece (72) is connected with the web of the high-pressure side clamping piece (5) through fasteners.

5. A transformer body compacting tool set according to claim 1, characterized in that the second tool (8) is an i-section bar.

6. The transformer body pressing tool according to claim 1, wherein the third tool (9) comprises a top connecting piece (91), an intermediate rod piece (92) and a bottom base plate (93), wherein the top connecting piece (91) is provided with a sliding groove matched with the second tool (8) and is in sliding connection with the second tool (8), one end of the intermediate rod piece (92) is connected with the top connecting piece (91), and the other end of the intermediate rod piece (92) is connected with the bottom base plate (93).

7. A transformer body compacting tool set according to claim 1, characterized in that a jack (1) is placed at the bottom of the third tool set (9).

8. The transformer body pressing tool according to claim 1, wherein the bottom of the third tool (9) is in the same height plane as the bottom of the low-voltage side clamping piece (4) and the bottom of the high-voltage side clamping piece (5).

9. A transformer body compacting tool set according to claim 1, characterized in that the third tools (9) are arranged on the outer side of the first tool (7) away from the core (2) and that the third tools (9) are symmetrically arranged with respect to the core (2).

10. A method of using the transformer body compaction tooling of any one of claims 1-9, comprising the steps of:

two jacks (1) are arranged at the bottoms of the low-pressure side clamping piece (4) and the high-pressure side clamping piece (5);

adjusting the third tool (9) to be right above the pressing point;

a jack (1) is arranged at the bottom of the third tool (9);

all jacks (1) are in just contact with the upper low-pressure side clamping piece (4), the upper high-pressure side clamping piece (5) and the third tool (9);

simultaneously, the six jacks (1) are pressurized.