Transformer body pressing tool

Abstract

The utility model relates to a transformer body pressing tool which comprises a positioning piece fixed on a coil pressing plate and a clamping plate assembly located above the positioning piece, and is technically characterized in that the positioning piece is an annular positioning plate, the edge of the annular positioning plate is provided with a downward extending positioning edge, and the upper surface of the annular positioning plate is provided with a concentric annular air bag; reinforcing layers are arranged on the inner ring face and the outer ring face of the concentric annular air bag respectively, an air injection opening is formed in the outer ring face, the clamping plate assembly comprises an upper annular clamping plate and a lower annular bearing plate connected with the lower surface of the upper annular clamping plate, and the center line of the upper annular clamping plate and the center line of the lower annular bearing plate coincide with the center line of the concentric annular air bag. The lower surface of the lower annular bearing plate corresponds to the upper surface of the concentric annular air bag. According to the tool, the pressing efficiency is remarkably improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer manufacturing, in particular to a transformer body pressing tool. Background Art

[0002] A transformer's short-circuit resistance is a key performance indicator. During the transformer production process, moisture in the coils and insulation can easily lead to height deviations. Some coils can also rebound after winding, causing the transformer's height to exceed the set dimensions after assembly. Therefore, the transformer body typically needs to be dried and compacted after assembly.

[0003] For example, CN 116741517 A discloses a transformer body compression fixture and its use method. The transformer body compression fixture comprises two first fixtures, one attached to each of the low-voltage side clamp and the high-voltage side clamp; the first fixture on the low-voltage side clamp and the first fixture on the high-voltage side clamp are connected via a second fixture; the second fixture is located on either side of the core and is connected to a third fixture, the length of the third fixture matching the size of the low-voltage side clamp and the high-voltage side clamp; the tops of the first and third fixtures are each provided with a slide groove matching the second fixture, and the tops of the first and third fixtures are both slidably connected to the second fixture. This fixture is intended to apply external force to the third fixture, thereby evenly applying force to the high-voltage side clamp and the low-voltage side clamp, reducing the force on the transformer body compression plate. By operating simultaneously at six compression points, the coil compression plate is more evenly stressed, achieving better coil compression than conventional four-point compression. However, the following problems still exist: when working, the six jacks are operated separately, which is not conducive to uniform pressure adjustment and is time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of the utility model is to provide a transformer body pressing tool with a reasonable structure and reliable use to solve the above problems, significantly improve the pressing efficiency and reduce the labor intensity of workers.

[0005] The technical solution of the utility model is:

[0006] A transformer body pressing tool includes a positioning piece for fixing on a coil pressure plate and a clamping plate assembly located above the positioning piece. The technical points are: the positioning piece is an annular positioning plate, the edge of the annular positioning plate is provided with a lower extending positioning edge, the upper surface of the annular positioning plate is provided with a concentric annular airbag, the inner annular surface and the outer annular surface of the concentric annular airbag are respectively provided with reinforcement layers, and the outer annular surface is provided with an air injection port, the clamping plate assembly includes an upper annular clamping plate and a lower annular pressure plate connected to the lower surface of the upper annular clamping plate, the center lines of the upper annular clamping plate and the lower annular pressure plate coincide with the center lines of the concentric annular airbag, and the lower surface of the lower annular pressure plate corresponds to the upper surface of the concentric annular airbag.

[0007] In the above transformer body pressing fixture, the lower surface of the upper annular clamping plate is provided with an annular boss, and the lower annular pressure plate is fixed to the annular boss by screws.

[0008] In the above transformer body pressing fixture, the edge of the upper annular clamping plate is provided with a positioning clamping block to facilitate the fixing of external equipment.

[0009] The beneficial effects of the utility model are:

[0010] Gas is injected into the concentric annular airbags, causing them to expand. The gas is evenly dispersed within the airbag cavity. Because the inner and outer surfaces of the concentric annular airbags are reinforced, the airbag expansion direction is limited horizontally, concentrating expansion in the vertical direction. Limited by the lower annular pressure plate, the airbag pressure acts evenly on the annular positioning plate, and thus on the coil pressure plate, compressing the transformer body. Compared with existing technologies, the pressure on the coil pressure plate can be quickly adjusted and maintained uniformly, saving time and effort, significantly improving compression efficiency, and reducing worker workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 Top view of the upper middle ring splint.

[0013] In the figure: 1. Pressurizing device, 2. Positioning clamp, 3. Upper annular clamp, 4. Lower annular pressure plate, 5. Concentric annular airbag, 6. Reinforcement layer, 7. Annular positioning plate, 8. Coil pressure plate, 9. Air injection port. DETAILED DESCRIPTION

[0014] The utility model is described in detail according to the accompanying drawings.

[0015] like Figure 1 、 Figure 2 As shown, the transformer body pressing fixture includes a positioning piece for fixing on the coil pressing plate 8 and a clamping plate assembly located above the positioning piece.

[0016] The positioning member is an annular positioning plate 7, the edge of which is provided with a lower extending positioning edge. The upper surface of the annular positioning plate 7 is provided with a concentric annular airbag 5, the inner and outer annular surfaces of which are respectively provided with a reinforcement layer 6, and the outer annular surface is provided with an air injection port 9.

[0017] The clamping plate assembly includes an upper annular clamping plate 3 and a lower annular pressure plate 4 connected to the lower surface of the upper annular clamping plate 3. The center lines of the upper annular clamping plate 3 and the lower annular pressure plate 4 coincide with the center lines of the concentric annular airbag 5, and the lower surface of the lower annular pressure plate 4 corresponds to the upper surface of the concentric annular airbag 5.

[0018] In this embodiment, an annular boss is provided on the lower surface of the upper annular clamping plate 3, and the lower annular pressure plate 4 is fixed to the annular boss by screws. A positioning clamp 2 is provided on the edge of the upper annular clamping plate 3 to facilitate the fixing of external equipment.

[0019] Working principle:

[0020] The annular positioning plate 7 is buckled onto the coil pressure plate 8 to achieve radial positioning. The concentric annular airbag 5 is located on the upper surface of the annular positioning plate 7. Compressed gas is injected into the concentric annular airbag 5 using the pressurizing device 1 to cause expansion. The gas is evenly dispersed in the airbag cavity. Since the inner and outer annular surfaces of the concentric annular airbag 5 are respectively provided with reinforcement layers 6, the expansion direction of the airbag is limited in the horizontal direction, and the expansion is concentrated in the vertical direction. Under the limitation of the lower annular pressure plate 4, the airbag pressure acts evenly on the annular positioning plate 7, and thus acts on the coil pressure plate 8, achieving compression of the transformer body.

[0021] The above detailed description of the embodiments of the present invention is intended to be a preferred embodiment of the present invention and should not be construed as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of this patent.

Claims

1. A transformer body pressing tool, comprising a positioning member fixed on a coil pressing plate and a clamping plate assembly located above the positioning member, characterized in that: The positioning member is an annular positioning plate, the edge of the annular positioning plate is provided with a lower extended positioning edge, the upper surface of the annular positioning plate is provided with a concentric annular airbag, the inner annular surface and the outer annular surface of the concentric annular airbag are respectively provided with a reinforcement layer, and the outer annular surface is provided with an air injection port, the clamping plate assembly includes an upper annular clamping plate and a lower annular pressure plate connected to the lower surface of the upper annular clamping plate, the center lines of the upper annular clamping plate and the lower annular pressure plate coincide with the center line of the concentric annular airbag, and the lower surface of the lower annular pressure plate corresponds to the upper surface of the concentric annular airbag.

2. The transformer body pressing tool according to claim 1, characterized in that: An annular boss is provided on the lower surface of the upper annular clamping plate, and the lower annular pressure plate is fixed to the annular boss by screws.

3. The transformer body pressing tool according to claim 1, characterized in that: A positioning clamp is provided on the edge of the upper annular clamping plate.

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