Novel transformer body positioning structure

Abstract

The utility model discloses a novel transformer body positioning structure which comprises an oil tank and a transformer body arranged in the oil tank, a lower clamping piece is arranged at the bottom end of the transformer body, a foot pad is arranged at the bottom end of the lower clamping piece, a positioning hole is formed in the foot pad, a special-shaped positioning nail is arranged at the bottom of the oil tank, and a first insulating layer is fixed to the special-shaped positioning nail. A shock absorption layer and a second insulation layer are arranged at the bottom of the oil tank from bottom to top, the special-shaped positioning nail and the first insulation layer penetrate through the shock absorption layer, the second insulation layer and the foot pad, and the end face of the bottom end of the foot pad is supported on the second insulation layer. An insulating paper board and a high-strength insulating sleeve need to be placed in a positioning seat, so that a device body positioning structure of a large transformer in a barrel type oil tank is low in production efficiency and high in production cost, and a positioning shaft cannot position the insulating paper board below a foot pad. And the insulation between the foot pad and the oil tank is not reliable, namely the insulation between the lower clamping piece and the oil tank is not reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer manufacturing, and particularly relates to a novel transformer body positioning structure. Background Art

[0002] In order to ensure smooth assembly and stable operation of large transformers with barrel-type oil tanks, the large transformer body needs to be positioned and insulated from the oil tank.

[0003] The traditional positioning method of the body of a large transformer in a barrel-type oil tank usually requires welding a positioning seat 15 at the bottom of the oil tank, placing a first insulating paperboard 16 and a high-strength insulating sleeve 17 in the positioning seat 15 in sequence, welding a positioning shaft 18 on the lower clamp 2 of the transformer body, and inserting the positioning shaft 18 into the high-strength insulating sleeve 17 of the positioning seat 15 when the transformer body is dropped and fixed. At the same time, the pad 3 at the lower end of the lower clamp 2 also needs to be insulated from the bottom of the oil tank 1 through the second insulating paperboard 19, and a shock-absorbing layer 7 is set between the second insulating paperboard 19 and the bottom of the oil tank 1, and finally the insulation positioning of the transformer body is completed. The traditional positioning method has the following disadvantages:

[0004] 1. The positioning structure of the transformer body is complex, resulting in low production efficiency and high production costs; 2. The positioning axis cannot position the insulating cardboard under the foot, resulting in unreliable insulation between the foot and the oil tank, that is, unreliable insulation between the clamp and the oil tank. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of transformer body positioning structure, so as to overcome the technical problems in the prior art that the body positioning structure of a large transformer in a barrel-type oil tank needs to be coordinated with the positioning seat and the positioning shaft, and also needs to place insulating cardboard and a high-strength insulating sleeve in the positioning seat, resulting in low production efficiency and high production cost of the body positioning structure of a large transformer in a barrel-type oil tank, and the positioning shaft cannot position the insulating cardboard under the foot, resulting in unreliable insulation between the foot and the oil tank, that is, unreliable insulation between the lower clamp and the oil tank. The specific technical solution is as follows:

[0006] A novel transformer body positioning structure comprises an oil tank and a transformer body, wherein the transformer body is arranged inside the oil tank, a lower clamp is connected to one end of the transformer body close to the bottom of the oil tank, a pad is arranged at one end of the lower clamp close to the bottom of the oil tank, a positioning hole is arranged on the pad vertically penetrating the pad, and a special-shaped positioning nail is arranged at the bottom of the oil tank;

[0007] A first insulating layer is fixed to the outer peripheral side of the special-shaped positioning pin;

[0008] A shock-absorbing layer is provided at a position corresponding to the foot at the bottom of the oil tank, a second insulating layer is provided at one end of the shock-absorbing layer away from the bottom of the oil tank, and the special-shaped positioning nail and the first insulating layer sequentially penetrate the shock-absorbing layer, the second insulating layer and the foot from bottom to top;

[0009] An end surface of the foot far away from the lower clamp is supported on the second insulating layer.

[0010] Preferably, the special-shaped positioning nail comprises a nail body and a nail head connected to each other;

[0011] The diameter of the connection between the nail head and the nail body is larger than the diameter of the nail body, and an arc-shaped structure is provided at one end of the nail head away from the nail body. The first insulating layer is fixed to the nail body, and its end away from the bottom of the oil tank abuts against the end surface of the connection between the nail head and the nail body, and its end close to the bottom of the oil tank is supported by the bottom of the oil tank.

[0012] Preferably, the first insulating layer is fixed to the nail body by glue or a shrink tape.

[0013] Preferably, the special-shaped positioning nail is connected to the oil tank by welding.

[0014] Preferably, the projection area of ​​the foot on the horizontal plane is defined as S, and the projection area of ​​the second insulating layer on the horizontal plane is defined as M, then S is completely located within M.

[0015] Preferably, the first insulating layer and the second insulating layer are both made of insulating paperboard.

[0016] Preferably, the axial height of the first insulating layer is defined as H, and the total thickness of the shock-absorbing layer, the second insulating layer and the foot is h, then H>h is satisfied.

[0017] Preferably, the shock-absorbing layer is made of rubber.

[0018] Compared with the existing technology, the utility model has the following beneficial effects:

[0019] 1. By arranging positioning holes on the pad feet, arranging special-shaped positioning nails on the bottom of the oil tank, fixing the first insulating layer on the outer peripheral side of the special-shaped positioning nails, and arranging the second insulating layer between the bottom of the oil tank and the pad feet, the problem that the body positioning structure of the large transformer in the barrel-type oil tank in the prior art needs to be located not only through the positioning seat and the positioning shaft, but also requires the placement of insulating cardboard and high-strength insulating sleeves in the positioning seat, resulting in low production efficiency and high production cost of the body positioning structure of the large transformer in the barrel-type oil tank, and the positioning shaft cannot position the insulating cardboard under the pad feet, resulting in unreliable insulation between the pad feet and the oil tank, that is, unreliable insulation between the lower clamp and the oil tank. In addition, the special-shaped positioning nails not only position the pad feet, but also complete the positioning of the second insulating layer.

[0020] 2. By setting a special-shaped positioning nail including a nail body and a nail head, the diameter of the connection between the nail head and the nail body is larger than the diameter of the nail body, thereby improving the positioning effect of the transformer body. At the same time, by setting the end of the nail head away from the nail body to be an arc-shaped structure, it is prevented that when the transformer body is pressed down, the special-shaped positioning nail is not crushed because the positioning hole is not coaxial with the special-shaped positioning nail in the first place.

[0021] 3. By setting the projection area S of the foot on the horizontal plane to be completely within the projection area M of the second insulating layer on the horizontal plane, it is prevented that the foot cannot be fully supported on the second insulating layer, resulting in unreliable insulation between the foot and the bottom of the oil tank.

[0022] 4. By setting the axial height of the first insulating layer to be greater than the total thickness of the shock-absorbing layer, the second insulating layer and the foot, the insulation effect between the special-shaped positioning pins and the foot is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0024] Figure 1 The present invention is a schematic diagram of the body positioning structure of a large transformer in a barrel-type oil tank in the prior art.

[0025] Figure 2 It is a schematic diagram of the positioning structure of the device body in the utility model.

[0026] Figure 3 It is a structural schematic diagram of the special-shaped positioning pin in the utility model.

[0027] Figure 4 It is a structural schematic diagram of the positioning hole in the utility model.

[0028] Description of main reference numerals:

[0029] 1-oil tank, 2-lower clamp, 3-foot, 4-positioning hole, 5-special-shaped positioning nail, 6-first insulating layer, 7-shock-absorbing layer, 8-second insulating layer, 9-nail body, 10-nail head, 11-arc-shaped structure, 12-adjusting groove, 13-cylindrical section, 14-truncated cone section, 15-positioning seat, 16-first insulating paperboard, 17-high-strength insulating sleeve, 18-positioning shaft, 19-second insulating paperboard. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0034] Example

[0035] like Figures 1 to 4 As shown, a new type of transformer body positioning structure provided in an embodiment of the present application includes an oil tank 1 and a transformer body, wherein the transformer body is arranged inside the oil tank 1, and a lower clamp 2 is connected to one end of the transformer body close to the bottom of the oil tank 1, and a pad 3 is provided at one end of the lower clamp 2 close to the bottom of the oil tank 1, and a positioning hole 4 is provided on the pad 3 and vertically penetrates the pad 3, and a special-shaped positioning nail 5 is provided at the bottom of the oil tank 1.

[0036] Preferably, the special-shaped positioning nail 5 is connected to the bottom of the oil tank 1 by welding. In order to improve the positioning effect of the transformer body, the positioning hole 4 is provided to include a cylindrical section 13 and a truncated cone section 14 which are connected to each other, and the truncated cone section 14 is located at an end close to the positioning hole 4 and close to the bottom of the oil tank 1. The diameter of the end of the truncated cone section 14 connected to the cylindrical section 13 is smaller than the diameter of the end of the truncated cone section 14 away from the cylindrical section 13, and the diameter of the end of the truncated cone section 14 connected to the cylindrical section 13 is equal to the diameter of the cylindrical section 13.

[0037] When the transformer body is lowered for installation, positioning is completed by the special-shaped positioning pins 5 and the positioning holes 4 , and a first insulating layer 6 is fixed on the outer peripheral side of the special-shaped positioning pins 5 .

[0038] Preferably, the first insulating layer 6 is an insulating cardboard, and the special-shaped positioning nail 5 includes a nail body 9 and a nail head 10 connected to each other, wherein the nail body 9 and the nail head 10 are an integrated structure, that is, the special-shaped positioning nail 5 is a whole, and the diameter of the connection between the nail head 10 and the nail body 9 is larger than the diameter of the nail body 9, and the end of the nail head 10 away from the nail body 9 is provided with an arc-shaped structure 11 to prevent the special-shaped positioning nail 5 from being crushed when the transformer body is pressed down because the positioning hole 4 is not coaxial with the special-shaped positioning nail 5 at the first time, and the first insulating layer 6 is fixed on the nail body 9, and its end away from the bottom of the oil tank 1 abuts against the connection between the nail head 10 and the nail body 9 The end face, one end of which is close to the bottom of the oil tank 1, is supported on the bottom of the oil tank 1. An inwardly recessed adjustment groove 12 is provided at the connection between the special-shaped positioning nail 5 and the oil tank 1. Specifically, the adjustment groove 12 is circumferentially arranged at the connection between the nail body 9 and the oil tank 1 with the central axis of the special-shaped positioning nail 5 as the center. By providing the inwardly recessed adjustment groove 12, the weld between the special-shaped positioning nail 5 and the bottom of the oil tank 1 can be located in the adjustment groove 12, preventing welding slag from affecting the effect of the first insulating layer 6 fixed on the special-shaped positioning nail 5, thereby preventing the insulation effect of the foot 3 and the special-shaped positioning nail 5 from being weakened. The first insulating layer 6 is fixed to the nail body 9 by glue or a shrink tape.

[0039] A shock-absorbing layer 7 is provided at a position at the bottom of the oil tank 1 corresponding to the foot 3, and a second insulating layer 8 is provided at one end of the shock-absorbing layer 7 away from the bottom of the oil tank 1. The special-shaped positioning nails 5 and the first insulating layer 6 penetrate the shock-absorbing layer 7, the second insulating layer 8 and the foot 3 in sequence from bottom to top, and the end face of the foot 3 away from the lower clamp 2 is supported on the second insulating layer 8.

[0040] Preferably, the shock-absorbing layer 7 is made of rubber, which provides a shock-absorbing effect as well as an insulating effect, thereby enhancing the insulation performance between the foot pad 3 and the oil tank 1 , and the second insulating layer 8 is made of insulating cardboard.

[0041] The projection area of ​​the foot 3 on the horizontal plane is defined as S, and the projection area of ​​the second insulating layer 8 on the horizontal plane is defined as M. In order to prevent the foot 3 from being unable to be fully supported on the second insulating layer 8, resulting in the foot 3 and the bottom of the oil tank 1 being unable to be insulated, it is satisfied that S is completely located within M; the axial height of the first insulating layer 6 is defined as H, and the total thickness of the shock-absorbing layer 7, the second insulating layer 8 and the foot 3 is defined as h. By setting H>h, the insulation effect between the special-shaped positioning nail 5 and the foot 3 is improved.

[0042] In summary, a novel transformer body positioning structure provided by an embodiment of the present application, by setting a positioning hole on the pad foot, setting a special-shaped positioning nail on the bottom of the oil tank, fixing a first insulating layer on the outer peripheral side of the special-shaped positioning nail, and setting a second insulating layer between the bottom of the oil tank and the pad foot, solves the problem in the prior art that the body positioning structure of a large transformer in a barrel-type oil tank needs to be coordinated with a positioning seat and a positioning shaft, and also needs to place an insulating cardboard and a high-strength insulating sleeve in the positioning seat, resulting in low production efficiency and high production cost of the body positioning structure of a large transformer in a barrel-type oil tank, and the positioning shaft cannot position the insulating cardboard under the pad foot, resulting in unreliable insulation between the pad foot and the oil tank, that is, unreliable insulation between the lower clamp and the oil tank. The special-shaped positioning nail positions the pad foot and also completes the positioning of the second insulating layer. The special-shaped positioning nail includes a nail body and a nail head, and the diameter of the connection between the nail head and the nail body is larger than the diameter of the nail body, thereby improving the positioning effect of the transformer body. At the same time, the nail head is set away from one end of the nail body. The invention has an arc-shaped structure, which prevents the special-shaped positioning pin from being crushed when the transformer body is pressed down because the positioning hole is not coaxial with the special-shaped positioning pin at the first time; by setting the adjustment groove, the weld between the special-shaped positioning pin and the bottom of the oil tank can be located in the adjustment groove, which prevents welding slag from affecting the effect of the first insulating layer being fixed on the special-shaped positioning pin, thereby preventing the insulation effect of the pad foot and the special-shaped positioning pin from being weakened; by setting the projection area S of the pad foot on the horizontal plane to be completely located within the projection area M of the second insulating layer on the horizontal plane, it is prevented that the pad foot cannot be fully supported on the second insulating layer, resulting in the pad foot and the bottom of the oil tank being unable to be insulated; by setting the axial height of the first insulating layer to be greater than the total thickness of the shock-absorbing layer, the second insulating layer and the pad foot, the insulation effect between the special-shaped positioning pin and the pad foot is improved; by setting the positioning hole to include a cylindrical section and a truncated cone section, the truncated cone section is located at one end of the positioning hole close to the bottom of the oil tank, and the diameter of the end of the truncated cone section close to the bottom of the oil tank is greater than the diameter of the end away from the bottom of the oil tank, so that when the transformer body is lowered and fixed, the positioning effect of the transformer body is improved.

[0043] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A novel transformer body positioning structure, comprising an oil tank (1) and a transformer body, wherein the transformer body is arranged inside the oil tank (1), one end of the transformer body close to the bottom of the oil tank (1) is connected to a lower clamp (2), and one end of the lower clamp (2) close to the bottom of the oil tank (1) is provided with a pad (3), characterized in that: The pad foot (3) is provided with a positioning hole (4) which vertically penetrates the pad foot (3), and the bottom of the oil tank (1) is provided with a special-shaped positioning nail (5); A first insulating layer (6) is fixed on the outer peripheral side of the special-shaped positioning pin (5); A shock-absorbing layer (7) is provided between the bottom of the oil tank (1) and the pad foot (3); a second insulating layer (8) is provided at one end of the shock-absorbing layer (7) away from the bottom of the oil tank (1); and the special-shaped positioning nail (5) and the first insulating layer (6) penetrate the shock-absorbing layer (7), the second insulating layer (8) and the pad foot (3) in sequence from bottom to top; An end surface of the pad foot (3) away from the lower clamp (2) is supported on the second insulating layer (8).

2. A novel transformer body positioning structure according to claim 1, characterized in that: The special-shaped positioning nail (5) comprises a nail body (9) and a nail head (10) which are connected to each other; The diameter of the connection between the nail head (10) and the nail body (9) is larger than the diameter of the nail body (9); an arc-shaped structure (11) is provided at one end of the nail head (10) away from the nail body (9); the first insulating layer (6) is fixed on the nail body (9); the end thereof away from the bottom of the oil tank (1) abuts against the end surface of the connection between the nail head (10) and the nail body (9); and the end thereof close to the bottom of the oil tank (1) is supported by the bottom of the oil tank (1).

3. A novel transformer body positioning structure according to claim 2, characterized in that: The first insulating layer (6) is fixed on the special-shaped positioning nail (5) by glue or a shrink tape.

4. A novel transformer body positioning structure according to claim 1, characterized in that: The special-shaped positioning nail (5) is connected to the oil tank (1) by welding.

5. The novel transformer body positioning structure according to claim 1 is characterized in that: The projection area of ​​the foot (3) on the horizontal plane is defined as S, and the projection area of ​​the second insulating layer (8) on the horizontal plane is defined as M, and then S is completely located within M.

6. A novel transformer body positioning structure according to claim 1, characterized in that: The first insulating layer (6) and the second insulating layer (8) are both insulating paperboard.

7. The novel transformer body positioning structure according to claim 1 is characterized in that: The axial height of the first insulating layer (6) is defined as H, and the total thickness of the shock absorbing layer (7), the second insulating layer (8) and the foot (3) is defined as h, then H>h is satisfied.

8. The novel transformer body positioning structure according to claim 1 is characterized in that: The material of the shock-absorbing layer (7) is rubber.

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