Novel transformer expansion tank structure

Abstract

The utility model discloses a novel transformer oil conservator structure which comprises an upper capsule piece and a lower capsule piece, and attaching edges are installed on the edge portions of the upper capsule piece and the lower capsule piece. The utility model relates to the technical field of transformer oil conservators, an upper bag piece and a lower bag piece are connected through an attaching edge, the strength and the abrasion resistance of the edge portion of an oil conservator air bag are enhanced, after a traditional oil conservator air bag with the uniform thickness is inflated and expanded, the edge portion is prone to wrinkling, a thickening layer is arranged, the thickening layer is located on the portion close to the attaching edge, and the thickness of the thickening layer is increased. The connecting portion of the upper bag piece and the lower bag piece is supported and strengthened, wrinkles are avoided to a certain degree, excessive abrasion of the edge portion is avoided, fracture caused by stress concentration is avoided, the durability and reliability of the conservator air bag are improved, the gradual change layer plays a transition role, the thickness is gradually reduced from the thickened layer to the thinned layer, and the service life of the conservator air bag is prolonged. And stress concentration caused by sudden thickness change is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer oil pillow technical field, concretely to a novel transformer oil pillow structure. BACKGROUND

[0002] The transformer oil pillow is a device for storing and adjusting transformer oil. Its main function is to create conditions for the thermal expansion and contraction of transformer oil, ensuring that the transformer tank is full of oil at any temperature and operating condition, so that the transformer body and the lower part of the bushing can reliably immerse in the oil, ensuring safe operation.

[0003] The utility model discloses a kind of capsules for power transformer with the CN210692299U of disclosure number, capsule body, lip edge structure and elastic keel are disclosed;The lip edge structure is set along the extension direction of capsule body, and lip edge structure is located at the outer contour of the maximum cross section position in horizontal direction under the capsule body inflation state;Capsule lip edge structure of V-shaped structure is adopted, there is no minimum point position on lip edge structure and fracture problem of lip edge structure can not be generated, and capsule breakage problem caused by metal burr of oil storage tank inner wall is effectively avoided;The elastic keel of adoption is installed on capsule body, can make lower layer rubber of capsule and the contact part of float ball flat, easily unfold, will not produce wrinkle, wrap float ball;But in the patent document, since the thickness of the lip edge structure part of capsule body is consistent with the thickness of the rest position, then the edge part can produce wrinkle under the state that capsule body is full of gas, stress concentration point is easy to form at wrinkle, lead to oil pillow is prone to crack, breakage problem when operating, and the top of capsule body is smooth, directly contact with oil storage tank, along with the respiration of transformer, capsule body reciprocating shrinkage and expansion, capsule body is prone to reciprocating friction with oil storage tank, increase the risk of capsule body breakage, can lead to external air and moisture into oil pillow inside, accelerate the oxidation and deterioration process of transformer oil.

[0004] For the above problems, there may be technical means to solve in the prior art, but the present case wants to provide an alternative or replacement technical solution. UTILITY MODEL CONTENT

[0005] To solve the problems in the background art, the utility model realizes the following technical scheme: a novel transformer oil pillow structure, comprising an upper capsule piece and a lower capsule piece, the edge parts of the upper and lower capsule pieces are each provided with a fitting edge;

[0006] The middle parts of the upper and lower capsule pieces are hollow cylindrical structures, the two end parts of the upper and lower capsule pieces are each a hollow semispherical structure, the upper and lower capsule pieces are mutually fitted to a capsule-like structure through the fitting edges, the upper and lower capsule pieces are each provided with a thickened layer part near the fitting edge, a gradual change layer part near the thickened layer part, and a thinned layer part near the gradual change layer part.

[0007] The upper capsule is provided with a plurality of middle protrusions equidistantly arranged in the middle part, and the two end parts of the upper capsule are provided with end protrusions.

[0008] Preferably, the upper capsule is provided with a vent.

[0009] Preferably, the upper capsule is provided with a strap.

[0010] Preferably, the upper capsule, the lower capsule and the fitting edge are in an integral structure.

[0011] Preferably, the upper capsule, the plurality of middle protrusions and the end protrusions are in an integral structure.

[0012] Preferably, the thickness of the fitting edge is the same as that of the thickened layer.

[0013] Beneficial effects

[0014] The utility model provides a novel transformer oil pillow structure has the following beneficial effects: the upper capsule and lower capsule are connected through the fitting edge, the strength and wear resistance of the edge part of oil pillow air bag are enhanced, the edge part is prone to wrinkle after the inflation of the traditional oil pillow air bag with uniform thickness is opened, the thickened layer is arranged in the part close to the fitting edge, supports and strengthens the connecting part of the upper capsule and lower capsule, wrinkle is avoided to a certain extent, the excessive wear of the edge part is avoided, the rupture caused by stress concentration is avoided, the durability and reliability of oil pillow air bag are improved, the transition effect of the gradual change layer is realized, the thickness is gradually reduced from the thickened layer to the thinning layer, the stress concentration caused by the thickness mutation is avoided, the thinning layer is located in the central region of the capsule body, the overall weight of the capsule body is reduced, the structure strength is not affected, the plurality of middle protrusions and end protrusions prevent the upper capsule and the inner top wall of transformer oil storage tank from being frequently rubbed to cause rupture, and safety is ensured. DRAWINGS

[0015] Fig. 1 It is a whole three-dimensional structure schematic view of the novel transformer oil pillow structure.

[0016] Fig. 2 It is a local main view schematic view of the novel transformer oil pillow structure.

[0017] Fig. 3 It is a side view schematic view of the novel transformer oil pillow structure.

[0018] In the figure: 1, the upper capsule piece, 2, the lower capsule piece, 3, the fit edge, 4, the middle convex strip, 5, the end convex strip, 6, the air vent, 7, the bandage, A, the thickened layer position, B, the gradual change layer position, C, the thinning layer position. DETAILED DESCRIPTION

[0019] Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of the utility model protection.

[0020] Embodiment: please refer to Figs. 1-3 Among them Fig. 2 And Fig. 3 The novel transformer oil pillow structure is divided into A, B and C three areas by the plurality of dot-dash lines, wherein A represents the thickened layer position A, B represents the gradual change layer position B, and C represents the thinning layer position C.

[0021] A novel transformer oil pillow structure, comprising an upper capsule piece 1 and a lower capsule piece 2, and the edge parts of the upper capsule piece 1 and the lower capsule piece 2 are provided with fit edges 3.

[0022] It should be noted that the fit edges 3 of the upper capsule piece 1 and the lower capsule piece 2 are mutually fitted, so that the upper capsule piece 1 and the lower capsule piece 2 are mutually buckled and closed.

[0023] Specifically, the middle parts of the upper capsule piece 1 and the lower capsule piece 2 are hollow cylindrical structures, the two end parts of the upper capsule piece 1 and the lower capsule piece 2 are hollow semispherical structures, the upper capsule piece 1 and the lower capsule piece 2 are mutually fitted to be a capsule-like structure through the fit edges 3, the parts of the upper capsule piece 1 and the lower capsule piece 2 close to the fit edges 3 are thickened layer positions A, the parts of the upper capsule piece 1 and the lower capsule piece 2 close to the thickened layer positions A are gradual change layer positions B, and the parts of the upper capsule piece 1 and the lower capsule piece 2 close to the gradual change layer positions B are thinning layer positions C.

[0024] It should be noted that the upper capsule 1, the lower capsule 2, the fitting edge 3, the middle protrusion 4, and the end protrusion 5 are all made of rubber material. In actual use, the upper capsule 1 and the lower capsule 2 are inflated to form a capsule structure. The lower capsule 2 floats on the surface of the transformer oil and floats up and down with the change of the oil level, thereby preventing the external air and moisture from entering the oil pillow, slowing down the oxidation and deterioration process of the transformer oil, and enhancing the strength and wear resistance of the edge of the oil pillow. The traditional oil pillow with uniform thickness is prone to wrinkles at the edge after being inflated. The thickened layer A is located near the fitting edge 3 to support and strengthen the connection between the upper capsule 1 and the lower capsule 2, thereby avoiding wrinkles, excessive wear of the edge, stress concentration leading to rupture, improving the durability and reliability of the oil pillow, and gradually reducing the thickness from the thickened layer A to the thinned layer C to avoid stress concentration caused by sudden change in thickness. The thinned layer C is located in the center of the capsule body, which reduces the overall weight of the capsule body without affecting its structural strength.

[0025] Specifically, a plurality of middle protrusions 4 are arranged at equal distances in the middle of the upper capsule 1, and end protrusions 5 are arranged at both ends of the upper capsule 1.

[0026] It should be noted that the plurality of middle protrusions 4 and the end protrusions 5 are used to contact the inner top wall of the transformer to prevent the upper capsule 1 from being frequently rubbed against the inner top wall of the transformer oil tank, thereby ensuring safety.

[0027] As a preferred embodiment, the upper capsule 1 is further provided with a vent 6 for air circulation.

[0028] As a preferred embodiment, the upper capsule 1 is further provided with a strap 7 for connection with the transformer.

[0029] As a preferred embodiment, the upper capsule 1, the lower capsule 2, and the fitting edge 3 are integrated.

[0030] As a preferred embodiment, the upper capsule 1, the plurality of middle protrusions 4, and the end protrusions 5 are integrated.

[0031] As a preferred embodiment, the thickness of the fitting edge 3 is the same as that of the thickened layer A.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel transformer oil conservator structure, characterized in that, It includes an upper capsule (1) and a lower capsule (2), and the edges of the upper capsule (1) and the lower capsule (2) are fitted with fitting edges (3); The middle part of the upper capsule (1) and the lower capsule (2) is a hollow cylindrical structure, and the two ends of the upper capsule (1) and the lower capsule (2) are hollow hemispherical structures. The upper capsule (1) and the lower capsule (2) are attached to each other by the bonding edge (3) to form a capsule-like structure. The upper capsule (1) and the lower capsule (2) are thickened layers (A) near the bonding edge (3), the upper capsule (1) and the lower capsule (2) are gradient layers (B), and the upper capsule (1) and the lower capsule (2) are thinned layers (C). The upper capsule (1) has multiple central protrusions (4) evenly spaced in the middle, and both ends of the upper capsule (1) have end protrusions (5).

2. The novel transformer oil conservator structure according to claim 1, characterized in that, The upper capsule (1) is provided with an air vent (6).

3. The novel transformer oil conservator structure according to claim 1, characterized in that, The upper capsule (1) is provided with a strap (7).

4. The novel transformer oil conservator structure according to claim 1, characterized in that, The upper capsule (1), lower capsule (2), and fitting edge (3) are an integral structure.

5. The novel transformer oil conservator structure according to claim 1, characterized in that, The upper capsule (1), the multiple central protrusions (4), and the end protrusions (5) are an integral structure.

6. The novel transformer oil conservator structure according to claim 1, characterized in that, The thickness of the bonding edge (3) is the same as that of the thickened layer (A).

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