Low-voltage die for energy-saving dry-type transformer

Abstract

The utility model relates to an energy-saving dry-type transformer low-voltage die which comprises a low-voltage die body, end sealing plates arranged on the two end faces of the low-voltage die body, and an upper supporting plate and a lower supporting plate which are arranged at the two ends of the low-voltage die body respectively and located in the low-voltage die body. At least two through holes are formed in the two opposite faces of the upper supporting plate and the lower supporting plate respectively, embedded nuts are fixed to the through holes, the upper supporting plate, the lower supporting plate and the end sealing plate are detachably connected through matching of connecting bolts and the embedded nuts, and a thickened steel plate is connected to the trimming plane of the low-pressure mold in a spot welding mode. The surface of the thickened steel plate is connected with a copper bar barrier strip in a spot welding mode in the length direction of the trimming plane, and an externally-applied aluminum plate attached to the peripheral face is detachably arranged on the peripheral face, except the trimming plane, of the low-pressure die. The dry-type transformer low-voltage mold solves the problems that in the manufacturing process of an existing low-voltage mold scheme, machining is tedious, identification is difficult, storage space is occupied, and dry-type transformer low-voltage molds with different loss requirements cannot be used universally.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry -type transformer production technical field, concretely relates to a kind of energy-saving dry-type transformer low-pressure mould. BACKGROUND

[0002] The existing dry-type transformer is usually made of outer mold for different capacity and different loss transformer in production. Especially after the new energy efficiency standard is put forward, the dry-type transformer market demand is mainly energy efficiency type, especially the first-class energy efficiency and the second-class energy efficiency are more. In the loss requirement of national standard, the first-class energy efficiency and the second-class energy efficiency load loss are same, the former requires lower no-load loss, and the no-load loss is directly related to the core, and the core diameter directly affects the diameter of low-pressure mould. Therefore, under normal circumstances, different energy efficiency standards need to use the same outer mold to change the better core grade to reduce the magnetic density and reduce the no-load loss, but the core of low-loss grade is higher in price, and has greater impact on the cost of transformer. The same core grade is used in the industry, the core diameter is increased to reduce the magnetic density, to achieve the purpose of reducing the no-load loss. But different low-pressure moulds are similar in appearance, and the size difference is not obvious, so it is not easy to distinguish and occupies space when storing. SUMMARY

[0003] In view of the deficiency of prior art, the utility model provides a kind of energy-saving dry-type transformer low-pressure mould, solve the problem of existing low-pressure mould scheme when making, processing is complicated, it is difficult to identify, occupies storage space, different loss requirement dry-type transformer low-pressure mould cannot be used universally.

[0004] The utility model is realized by the following technical schemes:

[0005] Provide a kind of energy-saving dry-type transformer low-pressure mould, including low-pressure mould, the end seal plate is set in both ends of low-pressure mould, further include the upper and lower support plate respectively set in both ends of low-pressure mould and located in low-pressure mould, at least two through holes are set in the two upper and lower support plates respectively in the two opposite surfaces, and pre-buried nut is fixed at the through hole, the upper and lower support plate and the end seal plate are detachably connected by the cooperation of connecting bolt and pre-buried nut, the thickened steel plate is connected by spot welding in the edge cutting plane of low-pressure mould, the thickened steel plate surface is spot welded and connected with copper bar baffle along the length direction of edge cutting plane, and the outer aluminum plate is detachably set on the peripheral surface of low-pressure mould except edge cutting plane.

[0006] The scheme is detachably connected with aluminum plate and thickened steel plate on both sides of low-pressure mould, which can be used to adjust the diameter of low-pressure mould, so that the production of first-class energy efficiency type dry-type transformer and second-class or third-class energy efficiency dry-type transformer can be carried out according to production needs, which is convenient to operate, low in cost, safe and reliable.

[0007] As preferred, the outer aluminum plate is connected with low-pressure mould by flat head self-tapping screw, and the accommodation groove for accommodating flat head is formed in the outer aluminum plate.

[0008] The accommodating groove is arranged on the outer aluminum plate, and is used for accommodating the flat head when the outer aluminum plate is connected with the low-pressure mold by the flat head self-tapping screw, so that the outer aluminum plate is kept in the same plane with the surface of the low-pressure mold after installation, and the installation can be used.

[0009] Further, the two sides of the end sealing plate are provided with clamping grooves, the low-pressure mold is a mold cylinder formed by rolling two steel plates, and the two sides of the mold cylinder are both bent to form clamping plates used for clamping cooperation with the clamping grooves.

[0010] The two sides of the end sealing plate are respectively provided with two opposite clamping grooves, and the two mold cylinders of the low-pressure mold are clamped into the clamping grooves by the clamping plates formed by bending.

[0011] Further, the low-pressure mold is further provided with an inner supporting plate between the two mold cylinders in the length direction.

[0012] The inner supporting plate arranged in the mold cylinder can increase the strength when the outer mold is high.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model utilizes the installation and dismounting of the outer aluminum plate and the thickened steel plate of the same outer mold to realize the change of the outer diameter of the low-pressure mold, achieve the zooming of the diameter space of the iron core, realize the purpose of reducing and increasing the no-load loss without changing the iron core type.

[0015] The utility model is economical in material, simple in operation, safe and reliable, reduces the storage space, saves the cost, has the characteristics of convenient production unified management, and can be used for conversion between different energy efficiencies of different types of dry-type transformers. DRAWINGS

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is Figure 1 It is the sectional view in the direction of A-A.

[0018] As shown in the drawings:

[0019] 1-end sealing plate, 2-low pressure mold, 3-flat head self-tapping screw, 4-connection bolt, 5-pre-buried nut, 6-up and down supporting plate, 7-limiting strip, 8-thickened steel plate, 9-outer aluminum plate, 10-inner supporting plate, 11-clamping groove, 12-clamping plate. CONCRETE IMPLEMENTING METHOD

[0020] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through a concrete implementing method.

[0021] The utility model provides an energy-saving dry-type transformer low pressure mould, including low pressure mould 2, both ends of low pressure mould 2 are provided with end seal plate 1, end seal plate 1 is integral steel sheet, and the both sides of end seal plate 1 are provided with clamping groove 11, and low pressure mould 2 is the mould cylinder of two steel sheets, and the both sides of mould cylinder are bent and form the clamping plate 12 for clamping groove 11.

[0022] The utility model provides an energy-saving dry-type transformer low pressure mould, including low pressure mould 2, both ends of low pressure mould 2 are provided with end seal plate 1, end seal plate 1 is integral steel sheet, and the both sides of end seal plate 1 are provided with clamping groove 11, and low pressure mould 2 is the mould cylinder of two steel sheets, and the both sides of mould cylinder are bent and form the clamping plate 12 for clamping groove 11. Figure 1 As shown in the figure, two through holes are formed in the upper and lower parts, and four through holes are arranged in a rectangular shape, the upper and lower support plates 6 are detachably connected with the end seal plate 1 through the connecting bolt 4 and the embedded nut 5, the thickened steel plate 8 is point-welded and connected to the low pressure mould 2 at the edge cutting plane, the copper bar stopper 7 is point-welded and connected to the surface of the thickened steel plate 8 along the length direction of the edge cutting plane, and the outer aluminum plate 9 is detachably arranged on the peripheral surface of the low pressure mould 2 and is attached to the peripheral surface. Figure 1 As shown in the figure, in the embodiment, three outer aluminum plates 9 are arranged, one outer aluminum plate 9 is arranged on each of the two sides of the edge cutting plane of the low pressure mould 2, the two outer aluminum plates 9 are separated by the clamping groove 11 and are symmetrically arranged as two arc-shaped aluminum plates, and a whole semicircular outer aluminum plate is arranged on the side far away from the low pressure mould 2, the outer aluminum plate 9 is provided with six accommodation grooves around the edge cutting plane of the low pressure mould 2, and the accommodation grooves are respectively close to the clamping groove 11 and close to the edge cutting plane.

[0023] When assembled, the end seal plate 1 and the upper and lower support plates 6 at the two ends of the low pressure mould 2 are fixedly connected through the connecting bolt 4, the two low pressure moulds 2 are clamped on the end seal plate 1, and the low pressure moulds 2 can be installed on the foil winding machine for winding. The copper bar stopper 7 is a stopper for fixing the position of the copper bar at the head of the wound coil, is positioned according to the specification of the copper bar and is point-welded on the horizontal cutting plane of the low pressure mould 2. When the outer mold with high height is encountered, the inner support plate 10 can be fixed in the low pressure mould 2 along the length direction to increase the strength.

[0024] When a first energy efficiency type dry transformer is produced, the outer aluminum plate 9 is fixed on the low pressure mould 2 through the flat head self-tapping screw, the copper bar stopper 7 is point-welded on the thickened steel plate 8, and the thickened steel plate 8 is point-welded and fixed on the edge cutting plane of the low pressure mould 2, so that the diameter of the low pressure mould can be increased, the space for the core diameter can be increased, the core magnetic density can be reduced, and the purpose of reducing the no-load loss without changing the type can be achieved.

[0025] When producing the secondary energy efficiency dry transformer, the thickened steel plate 8 and the outer aluminum plate 9 are removed, and the copper baffle 7 is spot-welded on the trimming plane of the low-pressure mold 2, so that the diameter of the low-pressure mold can be reduced.

[0026] The whole is sleeved on the foil winding machine square shaft from the central square shaft hole, then locked by the foil winding machine locking device, and then the separation film is wound on the surface of the outer mold; start the foil winding machine to wind the low-voltage foil coil; after the winding is completed, the coil with the outer mold is removed from the foil winding machine, and the whole is sent into the oven for high-temperature curing; after curing and cooling, the end sealing plate 1 at both ends of the low-pressure mold 2 is removed through the connecting bolts 4, and the upper and lower support plates 6 are respectively composed of two detachable steel plates; the upper and lower support plates 6 can be inwardly closed, which is convenient for disassembling the coil.

[0027] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above examples and drawings are only used to illustrate the technical scheme of the utility model and are not limited to the utility model, and the preferred embodiments of the utility model are described in detail, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. An energy-saving dry-type transformer low-voltage mold, comprising a low-voltage mold, end sealing plates are arranged on both end faces of the low-voltage mold, characterized in that: The low-pressure die is provided with upper and lower support plates arranged at two ends of the low-pressure die respectively, and the two upper and lower support plates are provided with at least two through holes on two opposite surfaces thereof respectively and are fixed with embedded nuts at the through holes, the upper and lower support plates are detachably connected with the end sealing plates through connecting bolts and the embedded nuts, the thickened steel plates are spot-welded to the low-pressure die at the edge cutting planes, the thickened steel plates are spot-welded to copper bars along the length direction of the edge cutting planes, and the low-pressure die is detachably provided with outer aluminum plates which are attached to the peripheral surface of the low-pressure die.

2. The energy-saving dry-type transformer low-voltage mold according to claim 1, characterized in that: The outer aluminum plates are connected with the low-pressure die through flat head self-tapping screws, and the outer aluminum plates are provided with accommodating grooves for accommodating the flat heads.

3. The energy-saving dry-type transformer low-voltage mold according to claim 1, characterized in that: Two sides of the end sealing plates are provided with clamping grooves, the low-pressure die is a die cylinder which is rolled from two steel plates, and the two sides of the die cylinder are both bent to form clamping plates which are used for clamping cooperation with the clamping grooves.

4. The energy-saving dry-type transformer low-voltage mold according to claim 1, characterized in that: An inner support plate is further arranged between the two die cylinders along the length direction in the low-pressure die.

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