Oil-impregnated paper capacitance type bushing oil tank structure

Abstract

The utility model discloses an oil-impregnated paper capacitance type bushing oil tank structure, which overcomes the defects that in a conventional oil tank device, a central conduit is arranged in the middle of an oil tank and is connected with an external conductor, so that the sealing is not tight, the oil tank is easily affected with damp, and air is easily accumulated between the oil tank and a porcelain bushing. The technical problem that the operation safety of the oil-impregnated paper capacitive bushing cannot be guaranteed is solved. According to the oil tank, the first sealing ring is arranged in the annular V-shaped groove formed by the bottom face of the oil tank body and the outer surface of the central guide pipe, the sealing performance of connection between the bottom face of the oil tank body and the outer surface of the central guide pipe is improved, and it is guaranteed that oil in the oil tank body cannot flow out. An oil channel hole is formed in the position, close to the inner edge of the porcelain bushing, of the bottom face of the oil cabinet body, the oil channel hole is used for communicating an inner cavity of the oil cabinet body with an inner cavity of the porcelain bushing, the oil channel hole faces downwards when the porcelain bushing is horizontally placed, at the moment, air on the upper portion of the oil cabinet body cannot flow into the porcelain bushing, and air clog cannot be formed after the porcelain bushing is turned from the horizontal state to the vertical state.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil -immersed paper capacitor type bushing, concretely relates to an oil -immersed paper capacitor type bushing oil tank structure. BACKGROUND

[0002] As the high voltage bushing commonly used in power transmission and transformation industry, the oil tank device in the structure of the oil -immersed paper capacitor type bushing is an important component of the oil chamber of the oil -immersed paper capacitor type bushing.The insulating oil in the oil tank device is communicated with the oil in the porcelain sleeve, and the internal temperature changes at any time during the operation of the porcelain sleeve, which further causes the oil in the porcelain sleeve to be affected by thermal expansion and cold contraction, enters the oil tank device or flows out of the oil tank device to meet the use demand of the oil in the porcelain sleeve; the central pipe is connected with the external conductor in the middle of the oil tank in the conventional oil tank device, but the central pipe is mostly connected with the oil tank with the defects of not being sealed strictly, being easy to be damp, and being easy to be air trapped between the oil tank and the porcelain sleeve, which causes the safety of the operation of the oil -immersed paper capacitor type bushing to be unable to be guaranteed. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of oil -immersed paper capacitor type bushing oil tank structures, and the purpose is to solve the technical problem that the safety of the operation of the oil -immersed paper capacitor type bushing cannot be guaranteed due to the defects of not being sealed strictly, being easy to be damp, and being easy to be air trapped between the oil tank and the porcelain sleeve in the middle of the oil tank in the conventional oil tank device, and the oil -immersed paper capacitor type bushing oil tank structure is provided.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An oil -immersed paper capacitor type bushing oil tank structure, including oil tank body, the bottom surface outer wall of the oil tank body is connected with porcelain sleeve, and it is characterized by: further including central pipe, one end outer wall of the central pipe is sleeved with center sleeve, the central pipe is connected with the upper surface and the bottom surface of the oil tank body, and the bottom of the center sleeve is connected in the upper surface of the oil tank body, and the outer wall of the center sleeve is connected with conductive sealing head;

[0006] Oil channel hole is set in the bottom surface of the oil tank body close to the inner edge of porcelain sleeve, and oil channel hole is used for connecting the internal cavity of the oil tank body and the internal cavity of porcelain sleeve;

[0007] The bottom surface of the oil tank body is set as inclined surface at the position contacted with the central pipe, and the inclined surface and the outer surface of the central pipe form annular V groove, and the first sealing ring is arranged in the annular V groove.

[0008] In the oil tank device of the utility model, the first sealing ring is arranged in the annular V groove formed by the bottom surface of the oil tank body and the outer surface of the central pipe, the sealing property of the connection between the bottom surface of the oil tank body and the outer surface of the central pipe is increased, and the oil in the oil tank body is prevented from flowing out.

[0009] In order to ensure that the oil level in the oil tank body is between 1 / 2 to 2 / 3 of the height of the oil tank body when the porcelain sleeve is in the vertical state, and the porcelain sleeve is in the process of changing from the horizontal state to the vertical state, air exists in the upper half of the oil tank body, so if the oil passage hole position is unreasonable, air will be trapped between the oil tank body and the porcelain sleeve; in order to solve the above problems, the oil passage hole is arranged on the bottom surface of the oil tank body close to the inner edge of the porcelain sleeve.

[0010] Further, the center sleeve comprises a center cylinder and a center baffle, the center baffle is integrally sleeved on the center cylinder, the inner wall of the center cylinder is sleeved with the outer wall of one end of the center conduit, and the bottom is connected to the upper surface of the oil tank body, the conductive sealing head is sleeved on the outer wall of the center cylinder, and the end of the conductive sealing head abuts against the center baffle.

[0011] The end of the center baffle towards the conductive sealing head is provided with a first sealing groove, and the second sealing ring is arranged in the first sealing groove, and the end of the conductive sealing head is tightly attached to the second sealing ring, so that the conductive sealing head and the center sleeve are in sealing connection through the second sealing ring, and the surface of the conductive sealing head in contact with the center sleeve is sealed to the outside.

[0012] Further, the center baffle is in contact with the upper surface of the oil tank body, a second sealing groove is arranged at the contact position of the oil tank body and the center baffle, and a third sealing ring is arranged in the second sealing groove, and the third sealing ring is tightly attached to the center baffle, so as to ensure the sealing connection between the center sleeve and the upper surface of the oil tank body.

[0013] Further, the inner wall of the center cylinder is provided with a third sealing groove and a spring contact finger groove from bottom to top along the circumference, a fourth sealing ring is arranged in the third sealing groove, and a spring contact finger is arranged in the spring contact finger groove, and the fourth sealing ring and the spring contact finger are tightly connected with the center conduit; the center conduit and the center sleeve are in sealing and electrical contact.

[0014] Further, the oil tank body comprises an oil tank upper shell and an oil tank bottom plate, the bottom of the oil tank upper shell is connected to the oil tank bottom plate through bolts, and the side surface of the oil tank upper shell is connected to a glass oil gauge, so that the amount of oil in the oil tank body can be observed through the glass oil gauge.

[0015] Further, a fourth sealing groove is arranged at the connection position of the oil tank upper shell and the oil tank bottom plate, and a fifth sealing ring is arranged in the fourth sealing groove, and the fifth sealing ring is tightly attached to the oil tank bottom plate; the sealing property of the internal cavity of the oil tank body is ensured.

[0016] Further, a fifth sealing groove is arranged at the position of the bottom surface of the oil tank body relative to the porcelain sleeve, and a sixth sealing ring is arranged in the fifth sealing groove, and the sixth sealing ring is tightly connected with the porcelain sleeve, so as to ensure the sealing property of the porcelain sleeve and prevent the oil in the porcelain sleeve from flowing out.

[0017] Further, the other end of the center conduit passes through the porcelain sleeve and is connected with an adjusting nut, a locking nut is sleeved on the center conduit in the oil tank body, and the bottom of the locking nut is connected with a plurality of limiting nuts;

[0018] The bottom surface of the oil tank body is connected with a fixing block opposite to each limiting nut, and a compression spring is connected between each limiting nut and the corresponding fixing block, and the compression spring drives the center conduit and the adjusting nut to press the bottom surface of the oil tank body.

[0019] Further, a guide shaft is connected between each limiting nut and the corresponding fixing block, and each guide shaft is located in one of the compression springs, and the guide shaft limits the compression spring to prevent the compression spring from tilting.

[0020] Further, the bottom surface of the oil tank body is connected with the porcelain sleeve through a cork gasket, and the cork gasket has a buffering effect.

[0021] The beneficial effects of the present utility model are as follows:

[0022] 1. In the oil-immersed paper capacitor type bushing oil tank structure, a first sealing ring is arranged in the annular V groove formed between the bottom surface of the oil tank body and the outer surface of the center conduit, the sealing property of the connection between the bottom surface of the oil tank body and the outer surface of the center conduit is improved, and the oil in the oil tank body is prevented from flowing out and can only pass through the oil passage hole.

[0023] 2. In the oil-immersed paper capacitor type bushing oil tank structure, an oil channel hole is arranged at the inner edge of the porcelain sleeve, the oil channel hole is used for connecting the internal cavity of the oil tank body and the internal cavity of the porcelain sleeve, the oil channel hole faces downward when the porcelain sleeve is horizontally placed, at this time, the air in the upper part of the oil tank body cannot flow into the internal cavity of the porcelain sleeve, and the air pocket is not formed after the porcelain sleeve is vertically placed.

[0024] 3. In the oil-immersed paper capacitor type bushing oil tank structure, the sealing rings are arranged between the plurality of components, the sealing property of the whole is improved, the oil in the internal cavity of the porcelain sleeve is prevented from being damp, and the leakage is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a sectional view of the oil-immersed paper capacitor type bushing oil tank structure.

[0026] In the drawing, 1 is an oil tank body, 2 is a center conduit, 3 is a center sleeve, 4 is an oil channel hole, 5 is a first sealing ring, 6 is a second sealing ring, 7 is a conductive sealing head, 8 is a third sealing ring, 9 is a fourth sealing ring, 10 is a spring contact finger, 11 is a porcelain sleeve, 12 is a fifth sealing ring, 13 is a sixth sealing ring, 14 is a locking nut, 15 is a limiting nut, 16 is a compression spring, and 17 is a guide shaft. DETAILED DESCRIPTION

[0027] The technical solutions of the utility model will be described clearly and completely in combination with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] The utility model discloses a kind of oil-immersed paper capacitor bushing oil tank structures, as shown in Figure 1 It includes oil tank body 1, the bottom surface outer wall of oil tank body 1 is connected porcelain sleeve 11, the bottom surface of oil tank body 1 is set up fifth sealing groove at the position opposite porcelain sleeve 11, sixth sealing ring 13 is set in fifth sealing groove, sixth sealing ring 13 is connected with porcelain sleeve 11 closely, and porcelain sleeve 11 is used to place oil.

[0029] Center conduit 2 is connected with the upper surface and bottom surface of oil tank body 1, and the upper surface of oil tank body 1 is connected with center sleeve 3, and the bottom of center sleeve 3 is connected in the upper surface of oil tank body 1, and the outer wall of center sleeve 3 is connected with conductive sealing head 7;Among them, center conduit 2, center sleeve 3 and conductive sealing head 7 can conduct electricity.

[0030] In the embodiment, center sleeve 3 includes center cylinder and center baffle, the outer wall of center cylinder is sleeved with center baffle, and the inner wall of center cylinder is sleeved with the outer wall of one end of center conduit 2, which can realize the electrical connection of center sleeve 3 and center conduit 2, and the bottom is connected in the upper surface of oil tank body 1 by bolt, and conductive sealing head 7 is sleeved on the outer wall of center cylinder, which can realize the electrical connection of center sleeve 3 and conductive sealing head 7, and the equipotential is connected to high voltage, and the end of conductive sealing head 7 abuts against center baffle;

[0031] The end of center baffle towards conductive sealing head 7 is set with first sealing groove, and second sealing ring 6 is set in first sealing groove, and the end of second sealing ring 6 is connected with conductive sealing head 7 closely, and the electrical connection of conductive sealing head 7 and center sleeve 3 is formed by second sealing ring 6, which ensures that the side of conductive sealing head 7 and center sleeve 3 is sealed to the outside.

[0032] The upper surface of oil tank body 1 is connected with center baffle, and the upper surface of oil tank body 1 is set with second sealing groove at the contact position, and third sealing ring 8 is set in second sealing groove, and third sealing ring 8 is connected with center baffle closely, which can ensure the sealed connection between center sleeve 3 and the upper surface of oil tank body 1.

[0033] The inner wall of the central cylinder is respectively provided with a third sealing groove and a spring contact finger groove along the circumference, a fourth sealing ring 9 is arranged in the third sealing groove, and a spring contact finger 10 is arranged in the spring contact finger groove, the fourth sealing ring 9 and the spring contact finger 10 are tightly connected with the central guide pipe 2, and the tight connection can guarantee the sealing between the central guide pipe 2 and the central sleeve 3 and the electrical contact.

[0034] In the embodiment, the oil tank body 1 is provided with an oil channel hole 4 at the bottom surface close to the inner edge of the porcelain sleeve 11, which is used to connect the internal cavity of the oil tank body 1 and the internal cavity of the porcelain sleeve 11. The oil channel hole 4 is arranged at the bottom surface of the oil tank body 1 close to the edge of the porcelain sleeve, and the oil channel hole is at the lower part when the porcelain sleeve 11 is horizontally placed. At this time, the air part at the upper part of the oil tank body 1 will not flow into the internal cavity of the porcelain sleeve 11, and the air pocket will not be formed after the porcelain sleeve 11 is vertically placed from the horizontal position.

[0035] In the embodiment, the bottom surface of the oil tank body 1 is provided with an inclined surface at the position in contact with the central guide pipe 2, the inclined surface and the outer surface of the central guide pipe 2 form an annular V-shaped groove, and a first sealing ring 5 is arranged in the annular V-shaped groove. The annular V-shaped groove is formed by the oil tank body 1 and the central guide pipe 2, and the first sealing ring 5 is arranged in the annular V-shaped groove. The sealing property of the connection between the bottom surface of the oil tank body 1 and the outer surface of the central guide pipe 2 is increased, and the oil in the oil tank body 1 is prevented from flowing out.

[0036] In the embodiment, the oil tank body 1 includes an oil tank upper shell and an oil tank bottom plate, and the bottom part of the oil tank upper shell is connected to the oil tank bottom plate by bolts. The oil tank upper shell is provided with a fourth sealing groove at the position connected to the oil tank bottom plate, and a fifth sealing ring 12 is arranged in the fourth sealing groove. The fifth sealing ring 12 is tightly connected to the oil tank bottom plate, which can increase the sealing property of the oil tank body 1, facilitate the cleaning of the internal cavity of the oil tank body 1, and facilitate the installation and dismounting of other components (such as a locking nut 14, a limiting nut 15, and a compression spring 16).

[0037] In the embodiment, the side surface of the oil tank upper shell is connected to a glass oil gauge, which facilitates the observation of the oil change amount in the oil tank body 1.

[0038] In the embodiment, the other end of the central guide pipe 2 penetrates through the porcelain sleeve 11 and is connected to an adjusting nut, a locking nut 14 is sleeved on the central guide pipe 2 in the oil tank body 1, the locking nut 14 can drive the central guide pipe 2 to move together, the bottom part of the locking nut 14 is connected to a plurality of limiting nuts 15, the bottom surface in the oil tank body 1 is connected to a fixed block at the opposite position of each limiting nut 15, and a compression spring 16 is arranged between each limiting nut 15 and the corresponding fixed block. The porcelain sleeve 11 and the bottom surface of the oil tank body 1 are pressed tightly by the compression spring 16, and then are sealed by a sixth sealing ring 13.

[0039] A cork gasket is further arranged between the bottom surface of the oil tank body 1 and the porcelain sleeve 11, which has a buffering effect.

[0040] The oil-immersed paper capacitor type bushing oil tank structure of the embodiment connects the conductive sealing head 7 to a high-voltage power supply, and oil is fed into the porcelain sleeve 11; when the temperature in the porcelain sleeve 11 rises, the oil inside the porcelain sleeve 11 expands and enters the oil tank body 1 through the oil channel hole 4, compresses the air in the oil tank body 1, and ensures the safety of the oil in the porcelain sleeve 11; when the temperature in the porcelain sleeve 11 decreases, the oil in the oil tank body 1 enters the porcelain sleeve 11 under the pressure of the compressed air inside.

[0041] The oil-immersed paper capacitor type bushing oil tank structure of the embodiment can automatically adjust the oil content in the porcelain sleeve 11 according to the temperature change in the porcelain sleeve 11 and the principle of thermal expansion and cold contraction.

[0042] The above is only a specific embodiment of the utility model, and the effect of the specific embodiment and the related comparative example is compared, but the protection scope of the utility model is not limited to this, any change or replacement within the technical scope disclosed by the utility model should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An oil-immersed paper condenser bushing oil tank structure comprising an oil tank body (1), the bottom surface outer wall of the oil tank body (1) is connected with a porcelain sleeve (11); characterized in that: It also includes a center conduit (2), one end of the outer wall of the center conduit (2) is sleeved with a center sleeve (3), the center conduit (2) penetrates the upper surface and the bottom surface of the oil tank body (1), and the bottom of the center sleeve (3) is connected in the upper surface of the oil tank body (1), and the upper part of the center sleeve (3) is connected with a conductive sealing head (7); The bottom surface of the oil tank body (1) is provided with an oil channel hole (4) near the inner edge of the porcelain sleeve (11), and the oil channel hole (4) is used for connecting the internal cavity of the oil tank body (1) and the internal cavity of the porcelain sleeve (11); The bottom surface of the oil tank body (1) is provided with an oil channel hole (4) near the inner edge of the porcelain sleeve (11), and the oil channel hole (4) is used for connecting the internal cavity of the oil tank body (1) and the internal cavity of the porcelain sleeve (11); 2. The oil immersed paper condenser bushing oil tank structure according to claim 1, characterized in that: The bottom surface of the oil tank body (1) is provided with an oil channel hole (4) near the inner edge of the porcelain sleeve (11), and the oil channel hole (4) is used for connecting the internal cavity of the oil tank body (1) and the internal cavity of the porcelain sleeve (11); The center sleeve (3) includes a center cylinder and a center baffle, the center cylinder is integrally sleeved with the center baffle, the inner wall of the center cylinder is sleeved with one end of the outer wall of the center conduit (2), and the bottom is connected in the upper surface of the oil tank body (1) through bolts, and the conductive sealing head (7) is sleeved on the outer wall of the center cylinder, and the end of the conductive sealing head (7) abuts against the center baffle; 3. The oil immersed paper condenser bushing oil tank structure according to claim 2, characterized in that: The end of the center baffle towards the conductive sealing head (7) is provided with a first sealing groove, the first sealing groove is provided with a second sealing ring (6), and the end of the conductive sealing head (7) is tightly attached to the second sealing ring (6).

4. The oil immersed paper condenser bushing oil tank structure according to claim 2, characterized in that: The center baffle is connected with the upper surface of the oil tank body (1), the oil tank body (1) is provided with a second sealing groove at the position of the center baffle, the second sealing groove is provided with a third sealing ring (8), and the third sealing ring (8) is tightly attached to the center baffle.

5. The oil immersed paper condenser bushing oil tank structure according to claim 1, characterized in that: The inner wall of the center cylinder is sequentially provided with a third sealing groove and a spring contact finger groove from bottom to top along the circumference, the third sealing groove is provided with a fourth sealing ring (9), and the spring contact finger groove is provided with a spring contact finger (10), and the fourth sealing ring (9) and the spring contact finger (10) are tightly connected with the center conduit (2).

6. An oil immersed paper condenser bushing oil tank structure according to claim 5, characterized in that: The oil tank body (1) includes an oil tank upper shell and an oil tank bottom plate, the bottom of the oil tank upper shell is connected with the oil tank bottom plate through bolts, the side of the oil tank upper shell is connected with a glass oil gauge, and the oil tank bottom plate is connected with the porcelain sleeve (11).

7. The oil immersed paper condenser bushing oil tank structure according to claim 1, characterized in that: The oil tank upper shell is provided with a fourth sealing groove at the position connected with the oil tank bottom plate, the fourth sealing groove is provided with a fifth sealing ring (12), and the fifth sealing ring (12) is tightly attached to the oil tank bottom plate.

8. The oil immersed paper condenser bushing oil tank structure according to claim 1, characterized in that: The bottom surface of the oil tank body (1) is provided with a fifth sealing groove at the position opposite to the porcelain sleeve (11), the fifth sealing groove is provided with a sixth sealing ring (13), and the sixth sealing ring (13) is tightly connected with the porcelain sleeve (11). The other end of the center conduit (2) penetrates the porcelain sleeve (11) and is connected with an adjusting nut, the center conduit (2) is sleeved with a locking nut (14) in the oil tank body (1), and the bottom of the locking nut (14) is connected with a plurality of limiting nuts (15). The bottom surface in the oil tank body (1) is connected with the fixed block opposite to each limiting nut (15), and a compression spring (16) is connected between each limiting nut (15) and the corresponding fixed block, and the compression spring (16) is used to drive the central guide pipe (2) and the adjusting nut, so that the porcelain sleeve (11) is pressed against the bottom surface in the oil tank body (1).

9. An oil immersed paper condenser bushing oil tank structure according to claim 8, characterized in that: A guide shaft (17) is connected between each limiting nut (15) and the corresponding fixed block, and each guide shaft (17) is located in one of the compression springs (16).

10. The oil immersed paper condenser bushing oil tank structure according to claim 1, characterized in that: A cork gasket is further arranged between the bottom surface outer wall of the oil tank body (1) and the porcelain sleeve (11).

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