CN111571088B - High-strength welding neck flange and processing method thereof - Google Patents
High-strength welding neck flange and processing method thereof Download PDFInfo
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- CN111571088B CN111571088B CN202010390875.2A CN202010390875A CN111571088B CN 111571088 B CN111571088 B CN 111571088B CN 202010390875 A CN202010390875 A CN 202010390875A CN 111571088 B CN111571088 B CN 111571088B
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- flange
- inclined plane
- internal thread
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention belongs to the technical field of metal connecting pieces, and particularly relates to a high-strength welding neck flange and a processing method thereof, wherein the method comprises the following steps: the middle position of the flange plate is provided with an internal thread, and the periphery of the internal thread is provided with six involutory holes which are distributed in central symmetry; the supporting cone is provided with a transition inclined plane, and a nut is arranged at the large-diameter end of the transition inclined plane; through the assembled design, can change the different support inner circle of internal diameter and external diameter, but the pipe fitting that the external diameter is the same of adaptation different internal diameters and wall thickness, support the support awl that the conical surface contained angle is different in addition, can adapt to the pipeline of different thickness and external diameter, the embedded portion that will support the awl through one end is installed in the internal thread, then will support the screwed pipe of inner circle tip and install in the internal thread that supports the awl tip, can change corresponding accessory according to the interim change of pipe fitting in the work progress, reduce purchase and manufacturing cost, and can improve the efficiency of construction.
Description
Technical Field
The invention belongs to the technical field of metal connecting pieces, and particularly relates to a high-strength welding neck flange and a processing method thereof.
Background
A welding neck flange is a kind of pipe fitting, and refers to a flange which has a neck and a circular pipe transition and is connected with the pipe in a butt welding way. The welding neck flange is not easy to deform, good in sealing performance and wide in application, has corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition, the distance between a welding opening and a joint surface is large, and the joint surface is prevented from being deformed by welding temperature.
The existing welding neck flange is generally formed by milling, the size cannot be modified after the processing is finished, and in practical application, the flange cannot adapt to the installation of the welding neck flange due to the change of the inner diameter of a pipeline with the thick wall, and the like of the pipeline, so that the welding neck flange needs to be reordered, the construction period is delayed, and the construction efficiency is influenced.
Disclosure of Invention
The invention provides a high-strength welding neck flange and a processing method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high strength welding neck flange comprising: the middle position of the flange plate is provided with an internal thread, and the periphery of the internal thread is provided with six involutory holes which are distributed in central symmetry; the supporting cone is provided with a transition inclined plane, a nut is arranged at the large-diameter end of the transition inclined plane, an embedded part is arranged at one end, away from the transition inclined plane, of the nut, and the embedded part is in threaded connection with the flange plate through internal threads; the supporting inner ring comprises a supporting ring and a threaded pipe, the threaded pipe is fixed to one end face of the supporting ring, and the supporting ring is in threaded connection with the small-diameter end of the transition inclined plane through the threaded pipe.
Preferably, the included angle between the inclined plane angle of the transition inclined plane and the axis of the support cone is 10-30 degrees.
Preferably, the end face of the embedded part is provided with a flange or an annular groove matched with the flange.
Preferably, a butt-joint sealing part or a convex ring matched with the butt-joint sealing part is arranged on the end face of one side, away from the support cone, of the flange plate.
Preferably, the apposition seal comprises three annular grooves.
Preferably, at least two blind holes are arranged on the outer side end face of the support ring, and the two blind holes are symmetrically distributed.
Preferably, the support ring forms a ninety-degree included angle with the small-diameter end surface of the transition inclined surface.
The processing method of the high-strength welding neck flange comprises the following steps:
step S1, a matching hole is formed in the disc-shaped metal piece, and an internal thread is turned in the middle position;
step S2, milling a nut at the end of the tubular metal piece, and turning threads at one side of the nut, milling an inclined plane at the other side of the nut, and processing internal threads at the inner side of the small-diameter end of the nut;
and step S3, a section of threaded pipe is machined on the annular metal piece.
Compared with the prior art, the invention has the beneficial effects that:
the invention can replace the supporting inner ring with different inner diameters and outer diameters through an assembly type design so as to adapt to pipe fittings with different inner diameters and wall thicknesses but the same outer diameter, and can also replace the supporting cone with different included angles of the cone surface so as to adapt to pipes with different thicknesses and outer diameters.
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 specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of the involution state of the present invention;
fig. 4 is a bottom view of the flange of the present invention.
In the figure: 1. a flange plate; 101. an internal thread; 11. fitting the holes; 12. a sealing part is closed; 2. a support cone; 21. a transition bevel; 22. a nut; 23. an embedded portion; 231. a flange; 3. supporting the inner ring; 31. a support ring; 32. a threaded pipe; 33. and (4) blind holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: a high strength welding neck flange comprising: an internal thread 101 is arranged in the middle of the flange plate 1, and six involutory holes 11 which are distributed in central symmetry are arranged on the periphery of the internal thread 101; the supporting cone 2 is provided with a transition inclined plane 21, the large-diameter end of the transition inclined plane 21 is provided with a nut 22, one end, far away from the transition inclined plane 21, of the nut 22 is provided with an embedded part 23, and the embedded part 23 is in threaded connection with the flange plate 1 through internal threads 101; the supporting inner ring 3, the supporting inner ring 3 includes a supporting ring 31 and a threaded pipe 32, the threaded pipe 32 is fixed on one end face of the supporting ring 31, and the supporting ring 31 is screwed on the small diameter end of the transition inclined plane 21 through the threaded pipe 32.
In the embodiment, the flange plate 1 is provided with an internal thread 101 at the middle position of the flange plate 1, and six involutory holes 11 which are distributed in central symmetry are arranged on the periphery of the internal thread 101; the supporting cone 2 is provided with a transition inclined plane 21, the large-diameter end of the transition inclined plane 21 is provided with a nut 22, one end, far away from the transition inclined plane 21, of the nut 22 is provided with an embedded part 23, and the embedded part 23 is in threaded connection with the flange plate 1 through internal threads 101; the supporting inner ring 3 comprises a supporting ring 31 and a threaded pipe 32, the threaded pipe 32 is fixed on one end face of the supporting ring 31, and the supporting ring 31 is in threaded connection with the small-diameter end of the transition inclined surface 21 through the threaded pipe 32; through the assembly type design, the supporting inner ring 3 with different inner diameters and outer diameters can be replaced, in addition, the supporting cone 2 can also be replaced by the supporting cone 2 with different included angles of the conical surfaces, during assembly, the supporting cone 2 is installed in the internal thread 101 through the embedded part 23 at one end, then the threaded pipe 32 at the end part of the supporting inner ring 3 is installed in the internal thread at the end part of the supporting cone 2 to complete installation, then the pipe fitting is sleeved on the outer wall of the supporting ring 31, the end surface of the pipe fitting abuts against the end surface of the supporting cone 2 to be welded, the fixing between the pipe fitting and the welding neck flange is realized, the other welding neck flange is welded in the same way, the two flanges are butted together, at the moment, the butt-joint sealing part 12 on one flange 1 is opposite to the convex ring on the other flange 1 to form a sealing effect, and the flange 231 arranged on the end surface of the embedded part 23 is matched with the annular groove to form a sealing part, a rubber pad is not added between the flange plates 1, so that the situation of untight sealing caused by aging of the rubber pad in a high-temperature environment can be reduced.
Specifically, the included angle between the inclined plane angle of the transition inclined plane 21 and the axis of the support cone 2 is 10-30 degrees, and the transition inclined plane 21 with different inclined angles can smoothly transition the large-diameter end to the small-diameter end with the same thickness as the pipe fitting according to the different thicknesses of the pipe fitting, so that the effects of improving the bearing capacity and the support strength are achieved.
Specifically, the end surfaces of the embedded portions 23 are provided with a flange 231 or an annular groove matched with the flange 231, and when the two embedded portions 23 are aligned, a sealing structure can be formed by matching the flange 231 and the annular groove, so as to avoid using a rubber pad.
Specifically, the end face of one side of the flange plate 1, which is far away from the support cone 2, is provided with a involutory sealing part 12 or a convex ring matched with the involutory sealing part 12, the involutory sealing part 12 comprises three annular grooves, and when the two flange plates 1 are involutory, the involutory sealing part 12 and the convex ring are involutory to form a reliable sealing structure.
Specifically, the outer side end face of the support ring 31 is provided with at least two blind holes 33, and the two blind holes 33 are symmetrically distributed, so that the support ring 31 can be conveniently rotated by using a tool to be detached.
Specifically, the support ring 31 and the small-diameter end surface of the transition inclined surface 21 form a ninety-degree included angle, so that the pipe fitting is attached to the end surface of the transition inclined surface 21.
The processing method of the high-strength welding neck flange comprises the following steps:
step S1, a matching hole 11 is formed in the disc-shaped metal piece, and an internal thread 101 is turned in the middle position;
step S2, milling a nut 22 at the end of the tubular metal piece, threading on one side of the nut 22, milling an inclined plane on the other side, and processing an internal thread on the inner side of the small-diameter end of the nut;
step S3, a section of threaded pipe 32 is machined on the annular metal piece.
The working principle and the using process of the invention are as follows: through the assembly type design, the supporting inner ring 3 with different inner diameters and outer diameters can be replaced, in addition, the supporting cone 2 can also be replaced by the supporting cone 2 with different included angles of the conical surfaces, during assembly, the supporting cone 2 is installed in the internal thread 101 through the embedded part 23 at one end, then the threaded pipe 32 at the end part of the supporting inner ring 3 is installed in the internal thread at the end part of the supporting cone 2 to complete installation, then the pipe fitting is sleeved on the outer wall of the supporting ring 31, the end surface of the pipe fitting abuts against the end surface of the supporting cone 2 to be welded, the fixing between the pipe fitting and the welding neck flange is realized, the other welding neck flange is welded in the same way, the two flanges are butted together, at the moment, the butt-joint sealing part 12 on one flange 1 is opposite to the convex ring on the other flange 1 to form a sealing effect, and the flange 231 arranged on the end surface of the embedded part 23 is matched with the annular groove to form a sealing part, a rubber pad is not added between the flange plates 1, so that the situation of untight sealing caused by aging of the rubber pad in a high-temperature environment can be reduced.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. High strength welded neck flange, its characterized in that: the method comprises the following steps: the flange plate comprises a flange plate (1), wherein an internal thread (101) is arranged in the middle of the flange plate (1), and six involutory holes (11) which are distributed in central symmetry are formed in the periphery of the internal thread (101); the supporting cone (2) is provided with a transition inclined plane (21), a nut (22) is arranged at the large-diameter end of the transition inclined plane (21), an embedded part (23) is arranged at one end, far away from the transition inclined plane (21), of the nut (22), and the embedded part (23) is in threaded connection with the flange plate (1) through an internal thread (101); the supporting inner ring (3) comprises a supporting ring (31) and a threaded pipe (32), the threaded pipe (32) is fixed on one end face of the supporting ring (31), and the supporting ring (31) is in threaded connection with the small-diameter end of the transition inclined plane (21) through the threaded pipe (32);
the included angle between the inclined plane angle of the transition inclined plane (21) and the axis of the support cone (2) is 10-30 degrees, and the transition of the large-diameter end to the small-diameter end with the same thickness as the pipe fitting can be smoothly realized according to the different thicknesses of the pipe fitting through the transition inclined planes (21) with different inclined angles, so that the effects of improving the bearing capacity and the support strength are achieved;
the end surfaces of the embedded parts (23) are provided with flanges (231) or annular grooves matched with the flanges (231), when the two embedded parts (23) are aligned, the flanges (231) and the annular grooves can be matched to form a sealing structure, so that a rubber pad is avoided;
an involutory sealing part (12) or a convex ring matched with the involutory sealing part (12) is arranged on the end surface of one side of the flange plate (1) far away from the support cone (2), and when the two flange plates (1) are involutory, the involutory sealing part (12) and the convex ring are involutory to form a reliable sealing structure;
the involutory sealing part (12) comprises three annular grooves, so that the support ring (31) can be conveniently rotated by using a tool for disassembly;
the outer side end face of the support ring (31) is provided with at least two blind holes (33), the two blind holes (33) are symmetrically distributed, and the support ring (31) can be conveniently detached by rotating with a tool;
the support ring (31) and the end face of the small-diameter end of the transition inclined plane (21) form a ninety-degree included angle, so that the pipe fitting is attached to the end face of the transition inclined plane (21);
during assembly, the supporting cone (2) is installed in the internal thread (101) through the embedded part (23) at one end, then a threaded pipe (32) at the end part of the supporting inner ring (3) is arranged in the internal thread at the end part of the supporting cone (2) to complete the installation, then the pipe fitting is sleeved on the outer wall of the supporting ring (31), the end surface of the support cone (2) is abutted against the end surface of the support cone for welding, so that the pipe fitting and the welding neck flange are fixed, and another welding flange is welded in the same way, the two flanges are butted together, the butted sealing part (12) on one flange plate (1) is opposite to the convex ring on the other flange plate (1) to form a sealing effect, and the end surface of the embedded part (23) is provided with a flange (231) which is matched with the annular groove to form a sealing part, a rubber pad is not added between the flange plates (1), so that the occurrence of poor sealing caused by aging of the rubber pad in a high-temperature environment is reduced.
2. The method for processing the high-strength welding neck flange according to claim 1, characterized in that: the method comprises the following steps:
step S1, a matching hole (11) is formed in the disc-shaped metal piece, and an internal thread (101) is turned in the middle position;
step S2, milling a nut (22) at the end of the tubular metal piece, threading one side of the nut (22), milling an inclined plane at the other side of the nut, and processing an internal thread at the inner side of the small-diameter end of the nut;
and step S3, a section of threaded pipe (32) is machined on the annular metal piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390875.2A CN111571088B (en) | 2020-05-11 | 2020-05-11 | High-strength welding neck flange and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390875.2A CN111571088B (en) | 2020-05-11 | 2020-05-11 | High-strength welding neck flange and processing method thereof |
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| Publication Number | Publication Date |
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| CN111571088A CN111571088A (en) | 2020-08-25 |
| CN111571088B true CN111571088B (en) | 2021-12-07 |
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| CN114166252B (en) * | 2022-02-10 | 2022-05-10 | 成都飞机工业（集团）有限责任公司 | Comprehensive positioning precision testing method for industrial robot integrated system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210318941U (en) * | 2019-06-11 | 2020-04-14 | 无锡市法兰锻造有限公司 | High-performance 12Cr2Mol material welding neck flange |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0030997D0 (en) * | 2000-12-20 | 2001-01-31 | Quip Ltd P | Apparatus for connecting flanged pipes |
| KR20140004064U (en) * | 2012-12-24 | 2014-07-02 | 현대중공업 주식회사 | Welding neck flanges |
| GB2538323B (en) * | 2015-05-15 | 2017-11-01 | Evenort Ltd | Mechanical seal assembly |
| CN204901134U (en) * | 2015-09-07 | 2015-12-23 | 温州富通管件制造有限公司 | Butt welding flange |
| CN205938266U (en) * | 2016-08-24 | 2017-02-08 | 温州万强法兰科技有限公司 | Novel high sealed neck mating flange that takes |
| CN206036454U (en) * | 2016-08-31 | 2017-03-22 | 天津市东跃工贸有限公司 | Convenient sealing flange of changing that resistance to wears |
| CN210196715U (en) * | 2019-06-17 | 2020-03-27 | 常州市武进第二法兰锻造有限公司 | High-strength impact-resistant neck-equipped welding neck flange for petroleum pipeline |
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2020
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210318941U (en) * | 2019-06-11 | 2020-04-14 | 无锡市法兰锻造有限公司 | High-performance 12Cr2Mol material welding neck flange |
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Inventor after: Zhi Shu Inventor after: Fu Zhong Inventor before: Fu Zhong |
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Effective date of registration: 20211118 Address after: 035400 Shen Shan Xiang Cui Jia Zhuang Cun, Dingxiang County, Xin Zhou City, Shanxi Province Applicant after: Shanxi Jinzhengda metal products Co.,Ltd. Address before: No. 1368, Yedao Road, new economic Industrial Park, Xitangqiao street, Haiyan County, Jiaxing City, Zhejiang Province Applicant before: Haiyan Flange Factory |
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