Sealed oil tank for oil-immersed transformer

Abstract

The utility model belongs to the technical field of oil-immersed transformers, and particularly relates to a sealing oil tank for an oil-immersed transformer, which comprises a tank body used for storing transformer oil, a cover body arranged at the top of the tank body and used for sealing the tank body, and a sealing gasket used for improving the sealing performance between the tank body and the cover body, the containing space is formed between the box body and the cover body, the sealing gasket and the containing space are in interference fit at a first temperature, the sealing gasket and the containing space are at least matched in size in the height direction at a second temperature, and the temperature value corresponding to the second temperature is smaller than the temperature value corresponding to the first temperature. The special containing space is arranged to store the sealing gasket, interference fit between the sealing gasket and the containing space is achieved under the specific temperature condition, the oil leakage problem caused by thermal expansion and cold contraction is avoided, the sealing gasket is made of the alloy plate with the good corrosion resistance coefficient, and compared with a traditional rubber gasket, the service life can be prolonged, and the service life is prolonged. And meanwhile, the sealing performance between the box body and the box cover is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil -immersed transformer technical field, concretely relates to a sealed oil tank for oil -immersed transformer. BACKGROUND

[0002] Oil -immersed transformer as important equipment in power system, its sealing performance is directly related to the safe operation and service life of transformer, at present, the oil -immersed transformer sealed oil tank widely used in market mainly includes the box for storing transformer oil, the cover for being set at the top of the box and the sealing gasket for increasing the sealing between the box and the cover, when installing, usually first the sealing gasket is laid on the top of the box, then the cover is covered on the box, and the cover and the box are fixed using bolt, and the sealing gasket can fill the gap between the box and the cover, thereby realizing the sealing of the oil tank.

[0003] However, the existing oil -immersed transformer sealed oil tank has some problems in the use process, because the sealing gasket is between the cover and the box and directly contacts with the transformer oil, and the common sealing gasket material such as rubber is easy to be corroded by the transformer oil, so that the aging speed of the sealing gasket is accelerated, and the service life is shortened, at the same time, the aging of the sealing gasket also affects the sealing between the box and the cover, leading to the leakage of the oil tank, which not only affects the normal operation of the transformer, but also may cause safety accidents. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model aims at providing a sealed oil tank for oil -immersed transformer, which solves the problems in the above background.

[0005] The utility model provides a sealed oil tank for oil -immersed transformer, including the box for storing transformer oil, the cover for being set at the top of the box and being used for sealing the box and the sealing gasket for increasing the sealing between the box and the cover, still include the accommodating space for storing the sealing gasket and being formed between the box and the cover, the sealing gasket and the accommodating space are interference fit at first temperature, the temperature value corresponding to the first temperature is no more than the temperature value corresponding to the lowest temperature in the installation and use environment of the sealed oil tank, the sealing gasket and the accommodating space are adapted in the size of at least height direction at second temperature, the temperature value corresponding to the second temperature is less than the temperature value corresponding to the first temperature.

[0006] Preferably, the number of accommodating spaces and sealing gaskets is multiple.

[0007] Preferably, the accommodating space is the recess opened in the top of the box and the bottom wall of the cover, when the sealing gasket and the accommodating space are interference fit, the top of the sealing gasket and the bottom wall of the cover form a sealed area.

[0008] Preferably, the accommodating space is a groove opened in the bottom of the cover and defined by the top wall of the tank body, and when the sealing gasket is in interference fit with the accommodating space, the bottom of the sealing gasket and the top wall of the tank body form a sealing area.

[0009] Preferably, the accommodating space is a first groove opened in the bottom of the cover and a second groove opened in the top of the tank body in opposition, and the sealing gasket is composed of a first sealing part arranged in the first groove and a second sealing part arranged in the second groove, and when the first sealing part is in interference fit with the accommodating space, the intersection of the first sealing part and the second sealing part forms a sealing area.

[0010] Preferably, the side of the sealing gasket close to the sealing area is flat, wavy or jagged.

[0011] Preferably, the first sealing part is provided with a continuous protrusion at the end away from the cover, and the second sealing part is provided with a slot matched with the protrusion.

[0012] The utility model discloses the beneficial effect is: through setting up the accommodating space of special storage sealing gasket, effectively avoid the direct contact of sealing gasket and transformer oil and cause the shortened life, and under the specific temperature, the sealing gasket is assembled into the accommodating space, can make sealing gasket and accommodating space always be in interference fit state in the use process of transformer, effectively avoid the problem of oil tank oil leakage.

[0013] The sealing gasket adopts the alloy plate material with better corrosion resistance coefficient, compared with the traditional rubber pad, can significantly prolong the service life, and enhance the sealing between the tank body and the cover. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the prior design of the utility model;

[0015] Figure 2 It is the structural schematic diagram of the utility model;

[0016] Figure 3 It is the overhead sectional structure schematic diagram of the utility model;

[0017] Figure 4 It is the structural schematic diagram of the first embodiment of the utility model;

[0018] Figure 5 It is the structural schematic diagram of the improved first embodiment of the utility model;

[0019] Figure 6 It is the enlarged structural schematic diagram of A in the utility model;

[0020] Figure 7 It is the structural schematic diagram of the second embodiment of the utility model;

[0021] Figure 8 It is the enlarged structure schematic view of B place in the utility model;

[0022] Figure 9 It is the structure schematic view of third embodiment of the utility model;

[0023] Figure 10 It is the structure schematic view of third embodiment of the utility model after improvement;

[0024] Figure 11 It is the enlarged structure schematic view of C place in the utility model.

[0025] In the figure: 1, box; 2, cover; 3, sealing gasket; 4, containing space; 5, recess; 6, sealing area; 7, first slot; 8, second slot; 9, first sealing part; 10, second sealing part; 11, protrusion; 12, missing slot. DETAILED DESCRIPTION

[0026] In order to make those skilled in the art better understand the technical scheme of the utility model, the utility model is described in detail below in conjunction with the drawings, and the description of this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0027] As Figure 1 As shown in the utility model, it is a kind of sealing oil tank for oil-immersed transformer, it mainly includes the box 1 for storing transformer oil, the cover 2 for being arranged at the top of box 1 and being used to seal box 1 and the sealing gasket 3 for increasing the sealing property between box 1 and cover 2, when installing, first, sealing gasket 3 is placed on the top of box 1, then cover is covered on box 1, and box cover and box 1 are fixed using bolt, sealing gasket 3 can fill the gap between box 1 and cover, realize the sealing of oil tank, above is the introduction of a kind of sealing oil tank for oil-immersed transformer of the prior art.

[0028] From the above, it is known that the sealing oil tank for oil-immersed transformer of the prior art has the following defects when in use, because sealing gasket 3 is between cover and box 1, and directly contacts with transformer oil, and commonly used sealing gasket 3 is rubber pad, it is easy to be corroded by transformer oil and appear aging, not only shorten the service life of sealing gasket 3, but also affect the sealing property between box 1 and cover, lead to the leakage of oil tank, based on the above problems, the utility model uses the following improvement mode to solve.

[0029] As Figures 2-11As shown in the figure, a kind of sealing oil tank for oil-immersed transformer, to solve the problem of oil leakage caused by thermal expansion and contraction of sealing gasket 3, the utility model adds containing space 4 for storing sealing gasket 3 on the basis of prior art, and the temperature and form of sealing gasket 3 during assembly are changed, the minimum temperature in the environment where oil-immersed transformer is installed and used is set as a limit, when the temperature is lower than the limit, i.e. first temperature, sealing gasket 3 and containing space 4 are in interference fit state, when the temperature is lower than the first temperature, i.e. second temperature, sealing gasket 3 is in flush state with containing space 4 in height direction, then the tank body 1 and the tank cover are connected together by using bolts, when the temperature rises to the first temperature, sealing gasket 3 and containing space 4 restore interference fit, i.e. during the use of oil-immersed transformer, sealing gasket 3 and containing space 4 are always in interference fit state, thereby avoiding the occurrence of oil tank oil leakage.

[0030] Further, in order to increase the sealing effect between the tank body 1 and the tank cover, the containing space 4 and the sealing gasket 3 can be provided in plurality (not shown in the figure), the containing space 4 can be provided on the tank body 1 or the tank cover, and the overall shape of the containing space 4 can be similar to the shape of the upper opening of the tank body 1, such as Figure 3 As shown in the figure, the opening of the tank body 1 is oval, and the space surrounded by the containing space 4 is also oval, and the plurality of containing spaces 4 and sealing gaskets 3 can be uniformly distributed on the top of the tank body 1 or the bottom of the tank cover.

[0031] Further, as shown in the figure, Figures 4-6 As a first embodiment of the utility model, the containing space 4 and the sealing gasket 3 are provided in one, at this time the containing space 4 is provided on the tank body 1, and the containing space 4 is defined by the groove 5 provided on the top of the tank body 1 and the bottom wall of the tank cover, when the sealing gasket 3 and the containing space 4 are in interference fit, the top of the sealing gasket 3 and the bottom wall of the tank cover form a sealing area 6, and the side wall of the sealing gasket 3 and the inner side wall of the containing space 4 also form a sealing area 6, avoiding transformer oil leakage, and different from the prior art, the sealing gasket 3 can adopt a material with better corrosion resistance coefficient, such as alloy plate, which can prolong the service life of the sealing gasket 3 and increase the sealing between the tank body 1 and the tank cover.

[0032] Further, as shown in the figure, Figures 7-8 As a second embodiment of the utility model, different from the first embodiment is the installation position of the containing space 4, at this time the containing space 4 is provided on the tank cover, and the containing space 4 is defined by the groove 5 provided on the bottom of the tank cover and the top wall of the tank body 1, when the sealing gasket 3 and the containing space 4 are in interference fit, the bottom of the sealing gasket 3 and the top wall of the tank body 1 form a sealing area 6, and the side wall of the sealing gasket 3 and the inner side wall of the containing space 4 also form a sealing area 6, avoiding transformer oil leakage, and the same as the first embodiment is that the sealing gasket 3 also adopts alloy plate material with better corrosion resistance coefficient.

[0033] Further, as shown in the figure,Figures 9-11 The third embodiment of the utility model is shown, and the shape of the accommodating space 4 is different from the first embodiment and the second embodiment, that is, the accommodating space 4 is composed of the first groove 7 opened in the bottom wall of the box cover and the second groove 8 in the top wall of the box body 1, and the sealing gasket 3 is composed of the first sealing part 9 arranged in the first groove 7 and the second sealing part 10 arranged in the second groove 8; when the first sealing part 9 is in interference fit with the accommodating space 4, the intersection of the first sealing part 9 and the second sealing part 10 forms the sealing area 6, and the side wall of the first sealing part 9 and the side wall of the second sealing part 10 form the sealing area 6 with the first groove 7 and the second groove 8, respectively; and the same as the first embodiment and the second embodiment is that the sealing gasket 3 also adopts the alloy plate material with good corrosion resistance coefficient.

[0034] Further, in order to increase the oil leakage prevention effect of the oil tank, on the basis of the first embodiment and the second embodiment, the side of the sealing gasket 3 close to the sealing area 6 can be arranged in a planar shape, at this time, the number of the sealing area 6 of one sealing gasket 3 is one; if the side of the sealing gasket 3 close to the sealing area 6 is arranged in a non-planar shape, that is, a wavy shape or a zigzag shape, at this time, one sealing gasket 3 can form multiple independent sealing areas 6; in the use process of the oil-immersed transformer, if the sealing gasket 3 is twisted or deformed, etc., the multiple independent sealing areas 6 can reduce the probability of oil leakage compared with one sealing area 6; on the basis of the third embodiment, a continuous protrusion 11 can be arranged at the end of the first sealing part 9 away from the box cover, the protrusion 11 includes but is not limited to a triangular shape, a rectangular shape or a semicircular shape, and correspondingly, a missing groove 12 matched with the protrusion 11 is opened in the second sealing part 10; when the protrusion 11 is inserted into the missing groove 12, the fit degree between the first sealing part 9 and the second sealing part 10 can be increased.

[0035] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0036] The principle and implementation mode of the utility model are described by applying specific examples in this document, and the above examples are only used to help understand the method of the utility model and its core idea. The above description is only the preferred implementation mode of the utility model, and it should be pointed out that due to the limitedness of the expression, there are objectively infinite specific structures, and for ordinary technical personnel in this technical field, some improvements, decorations or changes can be made without departing from the principle of the utility model, and the above technical features can also be combined in a proper way; these improvements, decorations, changes or combinations, or the direct application of the invention concept and technical scheme to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A sealed oil tank for an oil-immersed transformer, comprising a tank body (1) for storing transformer oil, a cover (2) disposed on top of the tank body (1) for sealing the tank body (1), and a sealing gasket (3) for increasing the sealing between the tank body (1) and the cover (2), characterized in that: It also includes a receiving space (4) formed between the box body (1) and the cover body (2) for storing the sealing gasket (3), wherein the sealing gasket (3) and the receiving space (4) are interference fit at a first temperature, the temperature value corresponding to the first temperature is not greater than the temperature value corresponding to the lowest temperature in the installation and use environment of the sealing oil tank, and the sealing gasket (3) and the receiving space (4) are at least dimensionally compatible in the height direction at a second temperature, wherein the temperature value corresponding to the second temperature is less than the temperature value corresponding to the first temperature.

2. The sealed oil tank for an oil-immersed transformer according to claim 1, characterized in that: The number of the receiving space (4) and the sealing gasket (3) is multiple.

3. The sealed oil tank for an oil-immersed transformer according to claim 1, characterized in that: The accommodating space (4) is defined by the groove (5) on the top of the box body (1) and the bottom wall of the box cover. When the sealing gasket (3) and the accommodating space (4) are interference-fitted, the top of the sealing gasket (3) and the bottom wall of the box cover form a sealing area (6).

4. A sealed oil tank for an oil-immersed transformer according to claim 1, characterized in that: The accommodating space (4) is defined by the groove (5) at the bottom of the box cover and the top wall of the box body (1). When the sealing gasket (3) and the accommodating space (4) are interference-fitted, the bottom of the sealing gasket (3) and the top wall of the box body (1) form a sealing area (6).

5. A sealed oil tank for an oil-immersed transformer according to claim 1, characterized in that: The accommodating space (4) is defined by a first groove (7) at the bottom of the box cover and a second groove (8) at the top of the box body (1). The sealing gasket (3) is composed of a first sealing part (9) in the first groove (7) and a second sealing part (10) in the second groove (8). When the first sealing part (9) is press-fitted with the accommodating space (4), a sealing area (6) is formed at the junction of the first sealing part (9) and the second sealing part (10).

6. A sealed oil tank for an oil-immersed transformer according to claim 1, characterized in that: The sealing gasket (3) is flat, wavy, or serrated on the side near the sealing area (6).

7. A sealed oil tank for an oil-immersed transformer according to claim 5, characterized in that: The first sealing part (9) has a continuous protrusion (11) at one end away from the box cover, and the second sealing part (10) has a notch (12) that matches the protrusion (11).

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