Epoxy resin air passage pouring inner mold structure for dry-type transformer

Abstract

The utility model relates to an epoxy resin air passage pouring inner mold structure for a dry-type transformer. The epoxy resin air passage pouring inner mold structure is characterized by comprising an inner mold cylinder body, an air passage rod fixing frame and an air passage rod, after the airway rod is inserted into the airway rod fixing frame, the airway rod pressing plate is arranged at the top end of the airway rod, so that the stability of the positioned airway rod before pouring is improved; and meanwhile, the top end of the air passage rod is provided with a frustum-shaped end head structure, so that the air passage rod can be quickly matched with a crowbar pressing groove in a crowbar pressing plate, the positioning accuracy of the air passage rod is improved, and the air passage rod is ensured to be in a pressed state after being positioned and the stability of the air passage rod during epoxy resin pouring.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry -type transformer technical field especially relates to epoxy resin air channel pouring inner mould structure for dry -type transformer. BACKGROUND

[0002] The low voltage and large current of the low voltage coil of the dry-type power transformer mostly adopt foil winding (copper foil or aluminum foil winding) structure, and the low voltage coil is between the iron core and the high voltage coil, so the heat dissipation condition is poor, and therefore a heat dissipation air channel needs to be arranged in the low voltage coil. During the winding process of the low voltage coil, an air channel rod is placed at intervals, and the air channel rod is pulled out after the coil is formed by pouring, so as to form the heat dissipation air channel. However, due to the lack of positioning structure, the air channel rod is prone to displacement during pouring, so that the thickness error of the epoxy resin between two adjacent air channel rods is large, resulting in uneven thickness of the epoxy resin. When the transformer coil is running, the temperature of the coil will rise, and the part with large thickness error of the epoxy resin cannot withstand large radial electric force, so the epoxy resin is prone to cracking, affecting the service life of the transformer coil. In addition, the uneven thickness of the epoxy resin affects the appearance of the transformer coil. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a kind of epoxy resin air channel pouring inner mould structure for dry-type transformer, can solve the stability of traditional dry-type transformer air channel rod when pouring epoxy resin, prone to displacement, leading to uneven thickness of epoxy resin, the situation of large thickness error of epoxy resin.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: an epoxy resin air channel pouring inner mould structure for dry-type transformer, the innovation point of which is that it comprises an inner mould cylinder, an air channel rod fixing frame and an air channel rod.

[0005] The horizontal section of the inner mould cylinder is in a waist-shaped structure, and the top end and the bottom end of the inner mould cylinder are both provided with sealing plates.

[0006] The air channel rod fixing frame has a pair of and is respectively installed on the outer contour near the upper and lower ends of the inner mould cylinder;The air channel rod fixing frame is in a waist-shaped structure and comprises an upper air channel rod fixing frame and a lower air channel rod fixing frame;The air channel rod fixing frame is uniformly provided with a plurality of rectangular air channel rod positioning holes;A plurality of L-shaped connecting plates are fixedly welded on the surface of the upper air channel rod fixing frame, and bolt holes are formed in the L-shaped connecting plates;The L-shaped connecting plates extend above the sealing plate at the top end of the inner mould cylinder, and the L-shaped connecting plates are locked and fixed with the top end of the inner mould cylinder through bolts, so as to lock the upper air channel rod fixing frame on the outer contour of the inner mould cylinder;The lower air channel rod fixing frame is welded at the edge of the sealing plate at the bottom end of the inner mould cylinder, and a pouring bottom plate is arranged on the lower surface of the lower air channel rod fixing frame to seal the bottom end of the air channel rod positioning holes in the lower air channel rod fixing frame.

[0007] The cross section of the air passage rod is in rectangular structure, the air passage rod has several, and the bottom end of the air passage rod passes through the air passage rod positioning hole of the upper air passage rod fixing frame along the vertical direction and is positioned and embedded in the air passage rod positioning hole of the lower air passage rod fixing frame; the air passage rod surrounds a waist-shaped structure; the top end of the air passage rod is provided with a waist-shaped annular air passage rod pressing plate, and the air passage rod pressing plate is parallel to the upper air passage rod fixing frame, and the air passage rod pressing groove is arranged on the air passage rod pressing plate corresponding to the position of the air passage rod positioning hole on the upper air passage rod fixing frame to position and press the top end of the air passage rod.

[0008] Further, the cover plate at the top end of the inner mold cylinder is provided with a lifting buckle.

[0009] Further, the air passage rods are of the same length, and the top end of the air passage rod is provided with a prismatic end head; the inner cavity of the air passage rod pressing groove on the air passage rod pressing plate is prismatic, facilitating close cooperation with the end head at the top end of the air passage rod.

[0010] The utility model discloses the advantages are:

[0011] 1) in the utility model, after the air passage rod is inserted into the air passage rod fixing frame, the air passage rod pressing plate is arranged at the top end of the air passage rod, the stability of the air passage rod after positioning is increased before pouring, and meanwhile, the prismatic end head structure is arranged at the top end of the air passage rod, which can facilitate quick cooperation between the prying rod pressing groove on the prying rod pressing plate and improve the positioning accuracy of the air passage rod, so that the air passage rod is in a pressed state after positioning, and the stability of the air passage rod during epoxy resin pouring is guaranteed. DRAWINGS

[0012] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0013] Figure 1 It is a cross-sectional view of the epoxy resin air passage pouring inner mold structure for the dry-type transformer of the utility model.

[0014] Figure 2 It is a top view of the upper air passage rod fixing frame for the dry-type transformer of the utility model. PREFERRED EMBODIMENT

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0017] As shown in Figure 1 Figure 2 An epoxy resin air channel casting inner mold structure for a dry-type transformer, comprising an inner mold cylinder 1, an air channel rod fixing frame 2 and an air channel rod 3.

[0018] The horizontal section of the inner mold cylinder 1 is in a waist-shaped structure, and the top end and the bottom end of the inner mold cylinder 1 are provided with sealing plates.

[0019] The air channel rod fixing frame 2 has a pair of and is respectively installed on the outer contours near the upper and lower ends of the inner mold cylinder 1; the air channel rod fixing frame 2 is in a waist-shaped structure and comprises an upper air channel rod fixing frame 21 and a lower air channel rod fixing frame 22; the air channel rod fixing frame 2 is uniformly distributed with a plurality of rectangular air channel rod positioning holes; a plurality of L-shaped connecting plates are fixedly welded on the surface of the upper air channel rod fixing frame 21, bolt holes are opened on the L-shaped connecting plates, the L-shaped connecting plates extend above the sealing plate at the top end of the inner mold cylinder 1, and the L-shaped connecting plates are locked and fixed with the top end of the inner mold cylinder 1 through bolts, so as to lock the upper air channel rod fixing frame 21 on the outer contour of the inner mold cylinder 1; the lower air channel rod fixing frame 22 is welded at the edge of the sealing plate at the bottom end of the inner mold cylinder, and the lower surface of the lower air channel rod fixing frame 22 is provided with a casting bottom plate 23, and the bottom end of the air channel rod positioning hole on the lower air channel rod fixing frame 22 is closed through the casting bottom plate 23.

[0020] The cross section of the air channel rod 3 is in a rectangular structure, the air channel rod 3 has a plurality of, and the bottom end of the air channel rod 3 passes through the air channel rod positioning hole of the upper air channel rod fixing frame in the vertical direction and is positioned and embedded in the air channel rod positioning hole of the lower air channel rod fixing frame 22; the air channel rod 3 surrounds a waist-shaped structure; the top end of the air channel rod 3 is provided with a waist-shaped annular air channel rod pressing plate 4, and the air channel rod pressing plate 4 is in line with the upper air channel rod fixing frame 21, and the air channel rod pressing plate 4 is provided with an air channel rod pressing groove corresponding to the position of the air channel rod positioning hole on the upper air channel rod fixing frame 21, which is used for positioning and pressing the top end of the air channel rod.

[0021] The sealing plate at the top end of the inner mold cylinder 1 is provided with a lifting buckle.

[0022] The air channel rods 3 have the same length, and the top end of the air channel rod 3 is provided with a prismatic end; the inner cavity of the air channel rod pressing groove on the air channel rod pressing plate 4 is prismatic, which is convenient for closely matching the end of the top end of the air channel rod 3.

[0023] The working principle of the utility model is: after the air channel stick is inserted into the air channel stick fixing frame, the air channel stick pressing plate is arranged at the top end of the air channel stick, the stability of the air channel stick after positioning is increased before pouring; meanwhile, the end head structure of the prismatic shape is arranged at the top end of the air channel stick, the air channel stick positioning precision is improved while the crowbar pressing groove on the crowbar pressing plate is quickly matched, the air channel stick is ensured to be in the pressing state after positioning, and the stability of the air channel stick during the epoxy resin pouring.

[0024] The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. An epoxy resin air duct casting inner mold structure for a dry-type transformer, characterized by: The utility model relates to a kind of inner mould cylinder, airway stick fixing frame and airway stick; The horizontal section of the inner mould cylinder is in a waist shape, and the top and bottom ends of the inner mould cylinder are provided with sealing plates. The airway stick fixing frame has a pair of frames installed on the outer contour near the upper and lower ends of the inner mould cylinder, and the airway stick fixing frame is in a waist shape and includes an upper airway stick fixing frame and a lower airway stick fixing frame. The airway stick has a rectangular cross section, and the bottom end of the airway stick passes through the airway stick positioning hole of the upper airway stick fixing frame in the vertical direction and is positioned and embedded in the airway stick positioning hole of the lower airway stick fixing frame.

2. The epoxy resin air duct casting inner mold structure for a dry-type transformer according to claim 1, characterized by: The sealing plate at the top end of the inner mould cylinder is provided with a lifting buckle.

3. The epoxy resin air duct casting inner mold structure for a dry-type transformer according to claim 1, characterized by: The airway sticks have the same length, and the top end of the airway stick is provided with a prismatic end.

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