Integrated sleeve root double-sealing structure of capacitor

Abstract

The utility model discloses a capacitor integrated sleeve root double-sealing structure, and belongs to the technical field of capacitor sleeve root sealing. The sealing structure comprises two groups of capacitor bushing bodies, two groups of sealing gasket groups and two groups of root flanges, the device further comprises a fixed flange plate, two through holes are formed in the fixed flange plate, the root flanges are installed in the through holes, and the root flanges and the fixed flange plate are connected into an integrated structure. The sealing gasket group comprises a second sealing gasket and a first sealing gasket, and the second sealing gasket and the first sealing gasket are both arranged between the outer wall of the capacitor bushing body and the inner wall of the root flange. And the fixed flange plates are arranged, so that the mounting strength of the two sets of sleeves is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitor bushing root sealing, and more specifically to a capacitor integrated bushing root double sealing structure. Background Art

[0002] The root of the bushing is composed of three major parts: the root flange, the sealing gasket, and the porcelain sleeve. When rolling the porcelain and the flange, auxiliary epoxy glue is needed to stick the buffer, and the sealing ring is rolled and pressed to achieve the sealing effect. Since the root of the capacitor bushing needs to be flat-sealed by the sealing flange, it cannot be guaranteed that there will be no micro-seepage of insulating oil at the root of the capacitor bushing. In the early stage, the research and development personnel of our company proposed a double-sealing structure at the root of the integrated capacitor bushing, with the announcement number CN219105929U. A sealing boss and a conical bevel are set at the root of the capacitor bushing to be sealed, and then a layer of sealing gasket is wrapped on the outside of the sealing boss and the conical bevel respectively. The two layers of sealing gaskets are stacked to form a double-sealing structure at the root of the capacitor bushing, thereby solving the unreliable problem of the existing single-layer sealing that is prone to failure. At the same time, the double-layer sealing structure is adopted to improve the sealing effect and solve the problem of micro-seepage of insulating oil in the capacitor box due to swelling micro-seepage during the operation of the capacitor bushing. However, when this sealing structure is used to seal the integrated double sleeves, the double sleeves are prone to uneven force. In view of this, we propose a double sealing structure at the root of the integrated sleeve of the capacitor. Utility Model Content

[0003] The utility model aims to provide a capacitor integrated bushing root double sealing structure to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A capacitor integrated bushing root double sealing structure comprises a capacitor bushing body, a sealing gasket group and a root flange, wherein the root flange is sleeved on the capacitor bushing body, and the capacitor bushing body, the sealing gasket group and the root flange are all arranged in two groups;

[0006] It also includes a fixed flange plate, which has two through holes, the root flange is installed in the through holes, and the root flange is connected to the fixed flange plate as an integrated structure;

[0007] The sealing gasket group comprises a second sealing gasket and a first sealing gasket, and the second sealing gasket and the first sealing gasket are both arranged between the outer wall of the capacitor bushing body and the inner wall of the root flange.

[0008] Preferably, the root flange comprises a first end body, an intermediate body and a second end body, and the first end body, the intermediate body and the second end body are an integrated structure;

[0009] The intermediate body comprises a first convex portion, an inclined portion and a wave portion, wherein the inclined portion is located between the first convex portion and the wave portion, and the wave portion is connected to the second end body.

[0010] Preferably, a semicircular arc-shaped inclined surface is provided between the fixed flange plate and the root flange, and a convex strip is provided between the two inclined surfaces.

[0011] Preferably, one end of the first protrusion is connected to the first end body, and the other end of the first protrusion is connected to the inclined portion;

[0012] The second sealing gasket is located on the first protruding portion and the inclined portion; the first sealing gasket is located on the second end body.

[0013] Preferably, the cross section of the first protrusion is an arc structure protruding toward the inner side of the capacitor bushing body, and the connection between the first protrusion and the inclined portion is an arc structure concave toward the outer side.

[0014] Preferably, the cross section of the second end body is an L-shaped structure, and the first sealing gasket is located on the top surface of the horizontal portion of the second end body and extends to the bending portion of the second end body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model forms an integrated double-tube structure through a fixed flange plate and two groups of flanges. On the basis of a traditional single-tube bushing, it is improved into an integrated bushing. The root flanges of the two single-tube bushings are connected into a whole by a fixed flange plate, and the whole is stamped and formed, so that the installation of the double-tube bushing is more convenient and quick. The setting of the fixed flange plate also increases the mechanical strength of the root of the bushing, thereby forming a double-sealed high-strength structure; the fixed flange plate and the two groups of capacitor bushing bodies, the sealing gasket group, and the root flange together form an integrated double-tube structure, which makes it more convenient to seal and connect the double bushings. When sealing, the two capacitor bushing bodies are evenly and stably stressed, and the sealing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the double-sealed high-strength structure at the root of the capacitor bushing of the utility model;

[0018] Figure 2 It is a schematic top view of the overall structure of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the capacitor bushing body and the root flange of the utility model;

[0020] Figure 4 It is a partial cross-sectional schematic diagram of the connection between the fixed flange plate and the root flange of the utility model.

[0021] Explanation of the numbers in the figure: 1. capacitor bushing body; 2. root flange; 201. first end body; 202. first raised portion; 203. inclined portion; 204. second raised portion; 205. concave portion; 206. third raised portion; 207. second end body; 208. wave portion; 3. second sealing gasket; 4. first sealing gasket; 5. fixed flange plate; 6. convex strip; 7. inclined body. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Example:

[0024] See also Figure 1-4 , a capacitor integrated bushing root double sealing structure, comprising a capacitor bushing body 1, a sealing gasket group and a root flange 2, the root flange 2 is sleeved on the capacitor bushing body 1, the root flange 2 is a circular cylindrical structure, the bottom of the root flange 2 is in contact with the flange of the capacitor bushing body 1 near the bottom, the capacitor bushing body 1, the sealing gasket group and the root flange 2 are all arranged in two groups;

[0025] It also includes a fixed flange plate 5, which has two through holes, and the root flange 2 is installed in the through holes. The root flange 2 and the fixed flange plate 5 are connected to form an integrated structure, which increases the mechanical strength of the root of the bushing, thereby forming a double-sealed high-strength structure; the fixed flange plate 5 and two groups of capacitor bushing bodies 1, the sealing gasket group, and the root flange 2 together constitute an integrated double bushing structure, which is improved to an integrated bushing on the basis of the traditional single bushing, and the root flanges 2 of the two single bushings are connected into a whole by the fixed flange plate 5, and the whole is stamped and formed, so that the double bushing is more convenient to seal and connect, and when sealing, the two capacitor bushing bodies 1 are subjected to uniform and stable force. Strip grooves are also provided on both sides of the fixed flange plate 5.

[0026] In the present application, a bevel body 7 is provided between the fixed flange plate 5 and the root flange 2. The bevel body 7 is connected to the root flange 2 at the top in the vertical direction and connected to the fixed flange plate 5 at the bottom. A convex strip 6 is provided between the two bevel bodies 7. The convex strip 6 and the fixed flange plate 5 are also an integrated structure. The strength of the fixed flange plate 5 is increased by the provision of the convex strip 6. A downward bending portion is provided on the outer side of the fixed flange plate 5, such as Figure 3 / 4 as shown.

[0027] The sealing gasket group includes a second sealing gasket 3 and a first sealing gasket 4, and the second sealing gasket 3 and the first sealing gasket 4 are both arranged between the outer wall of the capacitor bushing body 1 and the inner wall of the root flange 2. The second sealing gasket 3 and the first sealing gasket 4 cooperate with the root flange 2 to form a double sealing structure, so that the sealing between the ceramic body at the root of the capacitor bushing body 1 and the metal part is strengthened, the sealing performance is better, no epoxy resin glue is needed, and there is no outflow of epoxy resin glue in the later stage; there is no rolling on the weak part of the conical table at the root of the capacitor bushing body 1, which increases the mechanical strength, makes the structure simpler, and makes the sealing more reliable.

[0028] In the present application, the root flange 2 includes a first end body 201, an intermediate body and a second end body 207, and the first end body 201, the intermediate body and the second end body 207 are an integrated structure; the installation is convenient, the root flange 2 is evenly stressed, the torque reflects a small pressure on the capacitor bushing body 1, and the probability of damage to the stress point of the capacitor bushing is small.

[0029] The intermediate body includes a first raised portion 202, a chamfered portion 203 and a wave portion 208, wherein the chamfered portion 203 is located between the first raised portion 202 and the wave portion 208. The first raised portion 202 and the wave portion 208 are provided to facilitate the root flange 2 to fit the capacitor bushing body 1 more closely during installation.

[0030] Among them, one end of the first protrusion 202 is connected to the first end body 201, and the other end of the first protrusion 202 is connected to the inclined portion 203; the second sealing gasket 3 is located on the first protrusion 202 and the inclined portion 203; the first sealing gasket 4 is located on the second end body 207. The inclined portion 203 of the root flange 2 compresses the second sealing gasket 3 and the outer wall of the capacitor bushing body 1 to form a sealing effect; the root flange 2 compresses the first sealing gasket 4 and the end of the capacitor bushing body 1 to form a sealing effect.

[0031] In the present application, the wave portion 208 includes a second raised portion 204 , a concave portion 205 and a third raised portion 206 , the inclined portion 203 is connected to the second raised portion 204 , and the concave portion 205 is located between the second raised portion 204 and the third raised portion 206 .

[0032] In the present application, the cross section of the first protrusion 202 is an arc structure protruding toward the inside of the capacitor bushing body 1, and the connection between the first protrusion 202 and the inclined portion 203 is an arc structure concave toward the outside.

[0033] In the present application, the cross-section of the second end body 207 is an L-shaped structure, including a vertical portion and a horizontal portion, and a bending portion where the vertical portion and the horizontal portion are connected, the bending portion is a rounded corner, and the first sealing gasket 4 is located on the top surface of the horizontal portion of the second end body 207 and extends to the bending portion of the second end body 207.

[0034] The inclination directions of the cross sections of the first end body 201 and the inclined surface 203 are opposite, the inclination direction of the cross section of the inclined surface body 7 is the same as the inclination direction of the cross section of the first end body 201, and the cross section of the inclined surface 203 is an inclined surface that is inclined upward outward. The outer end of the first end body 201 is inclined downward, and when the first end body 201 is subjected to an upward force, the second sealing gasket 3 is squeezed inward, and at the same time, the second sealing gasket 3 can be prevented from sliding outward under the action of the first protrusion 202.

[0035] When the root flange 2 is connected to the metal part, the fixed flange plate 5 is subjected to an upward thrust, and at the same time, the root flange 2 is subjected to an upward thrust given by the fixed flange plate 5, and the root flange 2 compresses the first sealing gasket 4 and the end of the capacitor bushing body 1 to form a first sealing effect, and the inclined portion 203 of the root flange 2 compresses the second sealing gasket 3 and the bottom surface of the outer wall protrusion of the capacitor bushing body 1 to form a second sealing effect. Since the first end body 201, the intermediate body and the second end body 207 are designed as an integrated structure, the installation is convenient, and compared with the two-stage flange, the root flange 2 of the integrated structure is more evenly stressed and not easy to be damaged, the torque is reflected on the capacitor bushing body 1. The pressure is small, and the probability of damage to the stress point of the capacitor bushing is small. At the same time, the first end body 201, the intermediate body and the second end body 207 and the fixed flange plate 5 are designed as an integrated structure, so that the installation of the double bushing is more convenient and quick.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A capacitor integrated bushing root double sealing structure, comprising a capacitor bushing body (1), a sealing gasket assembly and a root flange (2), characterized in that: The root flange (2) is sleeved on the capacitor bushing body (1), and the capacitor bushing body (1), the sealing gasket set and the root flange (2) are all arranged in two groups; It also includes a fixed flange plate (5), the fixed flange plate (5) is provided with two through holes, the root flange (2) is installed in the through holes, and the root flange (2) and the fixed flange plate (5) are connected to form an integrated structure; The sealing gasket group comprises a second sealing gasket (3) and a first sealing gasket (4), and the second sealing gasket (3) and the first sealing gasket (4) are both arranged between the outer wall of the capacitor bushing body (1) and the inner wall of the root flange (2).

2. The capacitor integrated bushing root double sealing structure according to claim 1, characterized in that: The root flange (2) comprises a first end body (201), an intermediate body and a second end body (207), wherein the first end body (201), the intermediate body and the second end body (207) are an integrated structure; The intermediate body comprises a first protruding portion (202), an inclined portion (203) and a wave portion (208), wherein the inclined portion (203) is located between the first protruding portion (202) and the wave portion (208), and the wave portion (208) is connected to the second end body (207).

3. The capacitor integrated bushing root double sealing structure according to claim 1, characterized in that: A semicircular arc-shaped inclined surface (7) is arranged between the fixed flange plate (5) and the root flange (2), and a convex strip (6) is arranged between the two inclined surfaces (7).

4. The capacitor integrated bushing root double sealing structure according to claim 2, characterized in that: One end of the first protruding portion (202) is connected to the first end body (201), and the other end of the first protruding portion (202) is connected to the inclined portion (203); The second sealing gasket (3) is located on the first protruding portion (202) and the inclined portion (203); and the first sealing gasket (4) is located on the second end body (207).

5. The capacitor integrated bushing root double sealing structure according to claim 2, characterized in that: The cross section of the first protruding portion (202) is an arc structure protruding toward the inside of the capacitor bushing body (1), and the connection between the first protruding portion (202) and the inclined portion (203) is an arc structure concave toward the outside.

6. The capacitor integrated bushing root double sealing structure according to claim 2, characterized in that: The cross section of the second end body (207) is an L-shaped structure, and the first sealing pad (4) is located on the top surface of the horizontal part of the second end body (207) and extends to the bending part of the second end body (207).

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