CN211693082U

CN211693082U - Flange assembly

Info

Publication number: CN211693082U
Application number: CN202020217942.6U
Authority: CN
Inventors: 陈振东; 高伟廷; 李红杰; 房延梁
Original assignee: Siemens Transformer Jinan Co Ltd
Current assignee: Siemens Transformer Jinan Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-10-16
Anticipated expiration: 2030-02-27

Abstract

The utility model provides a flange subassembly, include: the flange comprises a flange body, wherein a plurality of first through holes are formed in the outer edge of the flange body; the transition gasket is a sheet matched with the outer edge of the flange body in shape, and at least two second through holes are formed in the transition gasket, wherein the hole diameter of each second through hole is smaller than that of each first through hole; the transition gasket is arranged between the flange body and the flat gasket; and a bolt and a nut, the bolt adapted to pass through the first through hole, the second through hole and the flat washer, and the nut adapted to threadedly mate with the bolt, wherein the flat washer is sandwiched between the transition washer and the nut.

Description

Flange assembly

Technical Field

The utility model relates to a flange subassembly.

Background

When the transformer needs to meet special offshore design rules, the number of anti-corrosion measures and seawater-resistant materials installed on the whole sea of the transformer is remarkably increased. In this case, additional costs are incurred.

Therefore, it is a technical problem in the industry to reduce the material cost as much as possible while meeting the protection requirements specified by the offshore design rules.

In particular, for the flange connection of the main tank of a transformer, it is required in the prior art that all flanges must be made of stainless steel, since damage to the corrosion protection cannot be avoided during the assembly process. However, when a special electric wrench or a special pneumatic wrench is used, the anticorrosive coating is easily damaged at the gasket. And the corrosion protection layer is also easily damaged by the rotation and vibration of the gasket. Often, damaged paint needs to be repaired after disassembly, and field assembly presents a risk.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned difficulty of prior art, the utility model provides a flange subassembly. The flange assembly is additionally provided with the transition gasket with a special design, so that the rotation and the vibration of the gasket can be reduced, and the damage of the rotation and the vibration to the protective coating is reduced. Furthermore, based on the utility model discloses a flange assembly's design, can also replace the cost of stainless steel in order to reduce the flange with ordinary steel.

Specifically, the utility model provides a flange subassembly, include:

the flange comprises a flange body, wherein a plurality of first through holes are formed in the outer edge of the flange body;

the transition gasket is a sheet matched with the outer edge of the flange body in shape, and is provided with at least two second through holes, wherein the aperture of each second through hole is smaller than that of the corresponding first through hole;

the transition gasket is arranged between the flange body and the flat gasket; and a bolt and a nut, the bolt being adapted to pass through the first through hole, the second through hole and a flat washer, and the nut being adapted to threadedly mate with the bolt, wherein the flat washer is sandwiched between the transition washer and the nut.

According to an embodiment of the present invention, in the flange assembly, an aperture of the first through hole is larger than an aperture of the second through hole by 2mm or more than 2 mm.

According to an embodiment of the present invention, in the above flange assembly, further comprising a pipe connected to the flange body, wherein the flange body and the pipe are made of a non-stainless material.

According to an embodiment of the present invention, in the above flange assembly, further comprising a ground seat, the ground seat is disposed on the pipeline, or the ground seat is disposed between two adjacent first through holes at the outer edge of the flange body.

According to an embodiment of the present invention, in the above flange assembly, the transition gasket is made of 316 stainless steel having a thickness between 3mm and 5 mm.

According to the utility model discloses an embodiment, in foretell flange subassembly, four second through-holes have been seted up on the transition gasket, four second through-holes arrange in proper order with the same interval on the transition gasket.

According to an embodiment of the present invention, in the above flange assembly, the transition pad is an arc-shaped sheet or a rectangular sheet.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 shows a schematic view of an embodiment of a transition piece according to the invention.

Fig. 2 shows a schematic view of another embodiment of a transition piece according to the present invention.

Fig. 3 shows a partial schematic view of an embodiment of a flange assembly according to the present invention.

Description of reference numerals:

10 flange body

20 transition pad

21 second through hole

30 flat washer

40 bolt

50 nut

60 pipeline

70 ground seat

80 ground wire

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

The basic principles and preferred embodiments of the present invention are discussed in more detail with reference to fig. 1-3. In the embodiment shown in fig. 1-3, the flange assembly according to the present invention mainly comprises: flange body 10, transition washer 20, flat washer 30, bolt 40 and nut 50.

A plurality of first through holes (not shown) are formed on the outer edge of the flange body 10.

In the embodiment shown in the drawings, the transition piece 20 is an arcuate sheet that matches the shape of the outer edge of the flange body 10. However, the present invention is not limited thereto, and in some embodiments, the transition pad 20 may be a rectangular sheet or other shape. The transition pad 20 is provided with at least two second through holes 21. For example, two second through holes 21 are formed in each transition pad 20 in the embodiment of fig. 1, while four second through holes 21 are formed in the embodiment of fig. 2, and the four second through holes 21 are sequentially arranged on the transition pad 20 at the same interval.

In a preferred embodiment, transition piece 20 is made of 316 stainless steel (e.g., 0Cr17Ni12Mo2) having a thickness between 3mm and 5 mm.

The second through hole 21 has a smaller aperture (diameter of hole) than the first through hole in the flange body 10. Preferably, the aperture of the first through hole is larger than that of the second through hole by 2mm or more than 2 mm. In this way, the bolts 40 are prevented from abutting against the inner wall of the first through-hole in the flange body 10, and damage to the paint in the hole during rotation is avoided. Based on this kind of design of avoiding destroying the coating, the utility model discloses a flange body 10 can adopt the ordinary steel of non-stainless steel to reduce manufacturing cost.

In the flange assembly described above, the transition gasket 20 is disposed between the flange body 10 and the flat gasket 30.

Further, the bolt 40 is adapted to pass through the first through hole, the second through hole 21 and the flat washer 30. The nut 50 is adapted to threadedly engage the bolt 40. The flat washer 30 is sandwiched between the transition washer 20 and the nut 50. Because transition gasket 20 has been add, the utility model discloses a bolt 40's length needs to extend correspondingly. For example, the bolt 40 is lengthened by 5mm for one-sided use and by 10mm for two-sided use.

During assembly, each pair of transition pads 20 is preferably bolted with bolts 40 to prevent rotation of transition pads 20 from damaging paint.

In the embodiment shown in fig. 3, the flange assembly may further include a pipe 60 interfacing with the flange body 10 and a ground socket 70. The flange body 10 and the pipe 60 may each be made of a non-stainless steel material (e.g., ordinary steel). In the embodiment of fig. 3, the ground socket 70 is provided on the pipe 60. Alternatively, in the embodiment shown in fig. 1 and 2, the ground socket 70 is provided between two adjacent first through holes at the outer edge of the flange body 10. The grounding function is achieved by connecting the two grounding bases 70 through the grounding wire 80.

To sum up, the utility model discloses a flange subassembly adds a special design's transition gasket, can reduce the rotation and the vibration of gasket to reduce rotatory and vibration to protective coating's damage. Furthermore, based on the utility model discloses a flange assembly's design, can also replace the cost of stainless steel in order to reduce the flange with ordinary steel.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A flange assembly, comprising:

the flange comprises a flange body (10), wherein a plurality of first through holes are formed in the outer edge of the flange body (10);

the transition gasket (20) is a sheet material matched with the outer edge shape of the flange body (10), at least two second through holes (21) are formed in the transition gasket (20), and the aperture of each second through hole (21) is smaller than that of each first through hole;

a flat gasket (30), the transition gasket (20) being disposed between the flange body (10) and the flat gasket (30); and

a bolt (40) and a nut (50), said bolt (40) being adapted to pass through said first and second through holes (21) and a flat washer (30), and said nut (50) being adapted to threadedly mate with said bolt (40), wherein said flat washer (30) is sandwiched between said transition washer (20) and said nut (50).

2. The flange assembly according to claim 1, wherein the aperture of the first through hole is 2mm or more larger than the aperture of the second through hole (21).

3. The flange assembly of claim 1, further comprising a pipe (60) connected to said flange body (10), wherein said flange body (10) and said pipe (60) are both made of a non-stainless steel material.

4. The flange assembly according to claim 3, further comprising a grounding seat (70), said grounding seat (70) being provided on a pipe (60) or said grounding seat (70) being provided between two adjacent first through holes at the outer edge of said flange body (10).

5. The flange assembly of claim 1, wherein said transition gasket (20) is made of 316 stainless steel having a thickness between 3mm and 5 mm.

6. The flange assembly according to claim 1, wherein the transition gasket (20) is provided with four second through holes (21), and the four second through holes (21) are sequentially arranged on the transition gasket (20) at the same interval.

7. The flange assembly of claim 1, wherein said transition gasket (20) is an arcuate sheet or a rectangular sheet.