Oil-oil sleeve flange structure

Abstract

The utility model discloses an oil-oil sleeve flange structure, which comprises a capacitor core, an end ring and a flange cylinder are sleeved on the capacitor core, and the end ring is fixedly connected with the front end flange surface of the flange cylinder; two convex rings are formed on the capacitor core in the flange cylinder, an accommodating space is formed between the two convex rings and the flange cylinder, and resin adhesive is filled in the accommodating space; the convex ring at the front end abuts against the inner side face of the end ring and is attached to the inner ring face of the flange cylinder; sealing rings are arranged on the abutting face of the flange cylinder and the end ring and the attaching face of the flange cylinder and the protruding ring. The convex ring at the rear end abuts against the inner side face of the rear port of the flange cylinder and is attached to the inner ring face of the flange cylinder. The capacitor core at the rear side of the convex ring is also attached to the inner ring surface of the rear port of the flange cylinder, and a sealing ring is also arranged at the attached part of the capacitor core and the inner ring surface of the rear port of the flange cylinder; the flange cylinder is provided with a terminal, and the terminal is connected with an end screen lead of the capacitor core. According to the utility model, the sealing effect is excellent, and the problem of high dielectric loss caused by damp of the end screen lead due to air entering can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to an oil-oil casing flange structure and belongs to the technical field of high-voltage casing matching electrical equipment. Background Art

[0002] The bushing is a device that connects the internal leads of the transformer to the external high-voltage wires, and plays the role of mechanical support, current carrying, sealing and insulation to the ground. There are many types of bushings, but there will be an end screen lead at the flange position, which serves as the measuring terminal of the bushing, and is related to the size of the bushing dielectric loss. As a type of bushing, the oil-oil bushing is immersed in oil during operation, and air will not enter. However, when stored for a long time, the flange structure of the conventional oil-oil bushing is a method of directly adding a metal gasket, and the sealing effect is not very good. Air will enter from the gap of the metal gasket, which may cause the end screen lead of the capacitor core to become damp, resulting in high bushing dielectric loss. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides an oil-oil casing flange structure with excellent sealing effect, which can effectively prevent the problem of high dielectric loss caused by moisture in the end screen lead due to air ingress.

[0004] The technical solution adopted by the utility model is:

[0005] An oil-oil casing flange structure comprises a capacitor core, an end ring and a flange cylinder are sleeved on the capacitor core, and the end ring and the front end flange surface of the flange cylinder are fixedly connected;

[0006] Two convex rings are formed on the capacitor core located in the flange cylinder, and a containing space is formed between the two convex rings and the flange cylinder, and the containing space is filled with resin glue;

[0007] The convex ring at the front end abuts against the inner side surface of the end ring and fits with the inner ring surface of the flange tube; a sealing ring is provided at the abutting surface of the flange tube and the end ring and the fitting surface with the convex ring;

[0008] The convex ring at the rear end abuts against the inner side surface of the rear port of the flange tube and fits with the inner ring surface of the flange tube; the capacitor core at the rear side of the convex ring also fits with the inner ring surface of the rear port of the flange tube, and a sealing ring is also provided at the fitting place between the capacitor core and the inner ring surface of the rear port of the flange tube;

[0009] Terminals are installed on the flange tube and are connected to the end screen leads of the capacitor core.

[0010] Preferably, a plurality of glue injection holes communicating with the accommodating space are formed on the flange cylinder, and screws for sealing are screwed into the glue injection holes.

[0011] Preferably, a sealing cap is also installed outside the terminal.

[0012] Preferably, the cross-section of the convex ring at the front end is a trapezoidal structure, and a cut surface facing the front end is formed at the inner opening of the end ring, and the inner cut surface of the end ring abuts against the front side surface of the convex ring.

[0013] Preferably, the end ring and the front end flange surface of the flange cylinder are fixedly connected by a plurality of bolts.

[0014] Preferably, a vent hole is opened in the rear end flange surface of the flange tube, a screw for sealing is also installed at the end of the vent hole, and a sealing sleeve is provided on the outer sleeve of the threaded section of the screw, and the sealing sleeve fits with the inner annular surface of the vent hole.

[0015] The beneficial effects of the utility model are:

[0016] The flange has a simple structure and is easy to operate, and can be assembled without any tooling. The connection between the end ring, flange tube and capacitor core, as well as the addition of sealing parts such as sealing rings and sealing caps, significantly improve the sealing effect, and can effectively prevent the problem of high dielectric loss caused by moisture in the end screen lead wire due to air ingress; and the sealing ring and sealing cap have low costs, good prices, and good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] The main reference numerals in the figure have the following meanings:

[0019] 1. Capacitor core, 2. End ring, 3. Flange tube, 4. Bolt, 5. Terminal, 6. Sealing cap, 7. Convex ring, 8. Glue injection hole, 9. Resin glue, 10. Screw, 11. Sealing ring, 12. Vent hole, 13. Sealing sleeve. DETAILED DESCRIPTION

[0020] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown: This embodiment is an oil-oil casing flange structure, including a capacitor core 1, on which an end ring 2 and a flange barrel 3 are sleeved, and the front end flange surfaces of the end ring 2 and the flange barrel 3 are fixedly connected by multiple bolts 4. A terminal 5 is installed on the flange barrel 3, and the terminal 5 is connected to the end screen lead of the capacitor core 1. A sealing cap 6 is also screwed on the outside of the terminal 5 to prevent air from entering.

[0022] Two convex rings 7 are formed on the capacitor core 1 located in the flange tube 3, and an accommodating space is formed between the two convex rings 7, the flange tube 3 and the capacitor core 1. A plurality of glue injection holes 8 connected with the accommodating space are opened on the flange tube 3. Resin glue 9 is filled into the accommodating space through the glue injection holes 8. After the glue injection is completed, the glue injection holes 8 are screwed into the glue injection holes 8 with screws 10 to seal the glue injection holes 8.

[0023] The convex ring 7 at the front end abuts against the inner side surface of the end ring 2 and fits with the inner ring surface of the flange tube 3; a sealing ring 11 is provided at the abutting surface between the flange tube 3 and the end ring 2 and the fitting surface with the convex ring 7; the convex ring 7 at the rear end abuts against the inner side surface of the rear port of the flange tube 3 and fits with the inner ring surface of the flange tube 3; the capacitor core 1 on the rear side of the convex ring 7 also fits with the inner ring surface of the rear port of the flange tube 3, and a sealing ring 11 is also provided at the fitting place between the capacitor core 1 and the inner ring surface of the rear port of the flange tube 3; the two sealing rings 11 prevent air from entering the flange tube 3.

[0024] like Figure 1 As shown, the cross section of the front end convex ring 7 is a trapezoidal structure, and a cut surface facing the front end is formed at the inner opening of the end ring 2, and the inner cut surface of the end ring 2 abuts against the front side surface of the convex ring 7. A vent hole 12 is opened in the rear end flange surface of the flange tube 3, and a screw 10 for sealing is also installed at the end of the vent hole 12. A sealing sleeve 13 is provided on the outer sleeve of the threaded section of the screw 10. After the screw 10 is screwed into the countersunk hole of the vent hole 12, the sealing sleeve 13 will fit with the inner ring surface of the vent hole 12, so that after the sleeve is installed, it can isolate the external air from entering the oil through the vent hole to ensure the sealing effect.

[0025] During assembly, first assemble the sealing ring 11 and the terminal 5 into the notch on the inner ring surface of the rear port of the flange tube 3, and then assemble the flange tube 3 onto the capacitor core 1; during assembly, connect the terminal 5 with the end screen lead, and screw the sealing cap 6 onto the terminal 5 to prevent air from entering. Then put the sealing ring 11 into the triangular groove on the front flange surface of the flange tube 3, and then assemble the end ring 2 onto the capacitor core 1, and fix it with the bolt 4 after it abuts against the front flange surface of the flange tube 3. Finally, fill the resin glue 9 between the two convex rings 7 of the flange tube 3 and the capacitor core 1 through the glue injection hole 8, and seal it with the screw 10 to prevent the resin glue 9 from flowing out.

[0026] The flange has a simple structure and is easy to operate, and can be assembled without any tooling. The connection between the end ring, flange tube and capacitor core, as well as the addition of sealing parts such as sealing rings and sealing caps, significantly improve the sealing effect, and can effectively prevent the problem of high dielectric loss caused by moisture in the end screen lead wire due to air ingress; and the sealing ring and sealing cap have low costs, good prices, and good economic benefits.

[0027] The above is only a preferred implementation of the utility model patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model patent. These improvements and modifications should also be regarded as the protection scope of the utility model patent.

Claims

1. An oil-oil casing flange structure, characterized in that: It includes a capacitor core, on which an end ring and a flange cylinder are sleeved, and the end ring and the front end flange surface of the flange cylinder are fixedly connected; Two convex rings are formed on the capacitor core located in the flange cylinder, and a containing space is formed between the two convex rings and the flange cylinder, and the containing space is filled with resin glue; The convex ring at the front end abuts against the inner side surface of the end ring and fits with the inner ring surface of the flange tube; a sealing ring is provided at the abutting surface of the flange tube and the end ring and the fitting surface with the convex ring; The convex ring at the rear end abuts against the inner side surface of the rear port of the flange tube and fits with the inner ring surface of the flange tube; the capacitor core at the rear side of the convex ring also fits with the inner ring surface of the rear port of the flange tube, and a sealing ring is also provided at the fitting place between the capacitor core and the inner ring surface of the rear port of the flange tube; Terminals are installed on the flange tube and are connected to the end screen leads of the capacitor core.

2. The oil-oil casing flange structure according to claim 1, characterized in that: The flange cylinder is provided with a plurality of glue injection holes which are in communication with the accommodating space, and screws for sealing are screwed into the glue injection holes.

3. The oil-oil casing flange structure according to claim 2, characterized in that: A sealing cap is also installed outside the terminal.

4. The oil-oil casing flange structure according to claim 1, characterized in that: The cross section of the convex ring at the front end is a trapezoidal structure, and a cut surface facing the front end is formed at the inner opening of the end ring, and the inner cut surface of the end ring abuts against the front side surface of the convex ring.

5. The oil-oil casing flange structure according to claim 1, characterized in that: The end ring and the front end flange surface of the flange cylinder are fixedly connected by a plurality of bolts.

6. The oil-oil casing flange structure according to claim 1, characterized in that: A vent hole is opened in the rear end flange surface of the flange tube, a screw for sealing is also installed at the end of the vent hole, and a sealing sleeve is outer-mounted on the threaded section of the screw, and the sealing sleeve fits with the inner annular surface of the vent hole.

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