CN115111444A - Plastic-lined pipeline branch pipe connecting structure - Google Patents
Plastic-lined pipeline branch pipe connecting structure Download PDFInfo
- Publication number
- CN115111444A CN115111444A CN202110293608.8A CN202110293608A CN115111444A CN 115111444 A CN115111444 A CN 115111444A CN 202110293608 A CN202110293608 A CN 202110293608A CN 115111444 A CN115111444 A CN 115111444A
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- China
- Prior art keywords
- branch
- plastic
- main pipe
- sealing
- elbow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/036—Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention discloses a plastic-lined pipeline branch pipe connecting structure in the field of electric power and petrochemical industry, which mainly comprises a main pipe, a branch short joint, a connecting sleeve, a sealing connecting cover and a connecting flange, wherein the branch short joint is a plastic-lined pipeline with a flange at one end and an elbow at the other end, and one end of the branch short joint with the elbow extends into the main pipe; the branch short circuit is connected with the sealing connection cover through the central hole; one end of the connecting sleeve is welded with the main pipe, the other end of the connecting sleeve is welded with the connecting flange, and the connecting flange is connected with the sealing connecting cover. The invention adopts the branch short circuit with the elbow to directly lead the medicament to be injected to the center of the main pipe, and the injected medicament flows and is diluted along with the main flow of the medium in the main pipe, thereby lightening and avoiding the corrosion of the medicament to the main pipe. Compared with the traditional connecting method, the connecting structure has the advantages of simple manufacture, high reliability, easy maintenance, reduced manufacturing cost and saved investment.
Description
Technical Field
The invention belongs to the pipeline connecting technology in the field of electric power and petrochemical industry, and particularly relates to a pipeline connecting technology for injecting a corrosive medium into a large-caliber non-corrosive medium.
Background
In power and petrochemical plants it is often necessary to inject highly corrosive chemicals (such as hydrochloric acid, etc.) into process piping in order to meet the process media properties (such as PH, etc.). In some devices, the corrosion of the process medium is very weak, the requirement can be met by selecting common carbon steel materials, and the lining plastic pipeline is required for the strong corrosion of the medicament.
Along with the enlargement of the device, the caliber of the process main pipe reaches more than DN700, while the caliber of the injected medicament is DN 20-DN 50, which are greatly different, for example, in a certain 1800t/h desalted water station, the main process medium (desalted water) pipeline is DN900, and the pipeline for injecting hydrochloric acid is DN 25. If the traditional connection mode of directly welding the medicament pipeline and the process main pipe is adopted, in order to prevent the connection part and the main pipe from being corroded, a section of internal lining plastic pipe with a certain length is required to be adopted in front of and behind the injection point of the main pipe. The plastic lining process of the large-diameter pipeline has high requirement, the quality is difficult to ensure (the problem that the plastic lining falls off under the medium impact can occur), and the manufacturing difficulty is increased.
Aiming at the condition that the difference between the caliber of the main process pipeline and the caliber of the pipeline filled with the medicament is very large, the connecting structure capable of avoiding lining plastic in the large-caliber main process pipeline is designed to solve the difficulty in manufacturing and reduce the investment.
Disclosure of Invention
The invention provides a plastic lining pipeline branch pipe connecting structure, which aims to solve the technical problems of high plastic lining process requirement and difficulty in manufacturing of large-diameter pipelines in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a lining plastic pipeline branch pipe connection structure, mainly comprises being responsible for, branch's short circuit, adapter sleeve, sealing connection lid, flange, its characterized in that: the branch short joint is a lining plastic pipeline with a flange at one end and an elbow at the other end, and the end of the branch short joint with the elbow extends into the main pipe; a center hole slightly larger than the outer diameter of the branch short circuit is formed in the center of the sealing connection cover, and the branch short circuit is connected with the sealing connection cover through the center hole; one end of the connecting sleeve is welded with the main pipe, the other end of the connecting sleeve is welded with the connecting flange, and the connecting flange is connected with the sealing connecting cover.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: and the flange end of the branch short joint is connected with a medicament pipeline to be injected into the main pipe.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: one end of the branch short circuit with the elbow extends into the main pipe, the direction of the elbow is along the medium flow direction, and the center of the elbow of the branch short circuit is aligned with the center line of the main pipe.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: the part of the branch short joint extending into the main pipe is also provided with external lining plastic.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: the center of the sealing connection cover is provided with a center hole slightly larger than the outer diameter of the branch short circuit, and the branch short circuit passes through the center hole and is connected with the sealing connection cover in a sealing and welding manner to form a whole.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: the branch short joint is welded with the sealing connection cover before the elbow is not welded, and then the elbow is welded at the end part of the branch short joint to form a whole. And after the welding is finished, lining plastic is carried out on the inner part and the outer part which need to be lined with plastic.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: the connecting flange is connected with the sealing connecting cover in a sealing mode through a connecting fastener in a sealing mode. The connecting fastener is a bolt fastener or a gasket.
The calibers of the connecting sleeve, the sealing connecting cover and the connecting flange are required to ensure that the elbow with the branch short joint can smoothly enter the main pipe, and the diameter of the connecting sleeve mouth is preferably 2-5 grades larger than that of the branch short joint.
The invention relates to a plastic lining pipeline branch pipe connecting structure, which is further characterized in that: the main pipe is a metal pipeline.
The invention directly leads the medicament to be injected to the center of the main pipe by adopting the branch short circuit with the elbow, and the injected medicament flows and is diluted along with the main flow of the medium in the main pipe, thereby reducing and avoiding the corrosion of the medicament to the main pipe. Compared with the traditional connecting method, the connecting structure has the advantages of simple manufacture, high reliability, easy maintenance, reduced manufacturing cost and saved investment.
Drawings
FIG. 1 is a schematic structural view of a plastic-lined pipe branch pipe connection structure of the present invention.
The reference symbols shown in the figures are: 1-main tube; 2-branch short circuit; 21-a flange; 22-bend; 23-external lining plastic; 24-lining plastic; 3-connecting the sleeve; 4-sealing the connecting cover; 5-connecting a flange; 6-connecting the fastener.
Detailed Description
The present invention is described in further detail below with reference to fig. 1, and the detailed description does not limit the scope of the claimed invention.
The invention discloses a plastic-lined pipeline branch pipe connecting structure, which mainly comprises a main pipe 1, a branch short joint 2, a connecting sleeve 3, a sealing connecting cover 4, a connecting flange 5 and a connecting fastener 6 thereof.
The branch short joint 2 is a plastic-lined pipeline 24 with a flange 21 at one end and an elbow 22 at the other end, and the end of the branch short joint 2 with the elbow 22 extends into the main pipe; the part of the branch short joint 2 extending into the main pipe 1 needs an external lining plastic 23. One end of the branch short circuit is provided with a flange 21, the flange 21 is used for connecting with a medicament pipeline to be injected into the main pipe, and the other end of the branch short circuit is provided with an elbow 22. The branch short circuit has the one end of elbow and stretches into in being responsible for 1, and the elbow center of short circuit aligns with being responsible for the central line, and the elbow orientation is for following the medium flow direction. The direction indicated by the arrow in the figure is the medium flow direction. The portion of the branch stub extending into the main pipe requires an outer lining 23.
The center of the sealing connection cover 4 is provided with a center hole slightly larger than the outer diameter of the branch short joint 2, and the branch short joint passes through the center hole and is connected with the sealing connection cover in a sealing welding way to form a whole. In the manufacturing process, the branch short joint and the sealing connection cover are required to be welded and connected in a sealing mode to form a whole, and then the inner portion and the outer portion which need to be lined with plastic are lined with plastic.
One end of the connecting sleeve 3 is welded with the main pipe 1, a tee joint or a reinforced pipe joint can be adopted, and the other end is welded with the connecting flange 5; the connecting flange 5 and the sealing connecting cover 4 are connected in a sealing mode through connecting bolts and gaskets. The calibers of the connecting sleeve 3, the sealing connecting cover 4 and the connecting flange 5 are required to ensure that the elbow 22 with the branch short joint can smoothly enter the main pipe.
Claims (8)
1. The utility model provides a lining plastic pipe branch connection structure, mainly comprises being responsible for, branch's short circuit, adapter sleeve, sealing connection lid, flange, its characterized in that: the branch short joint is a lining plastic pipeline with a flange at one end and an elbow at the other end, and the end of the branch short joint with the elbow extends into the main pipe; a center hole slightly larger than the outer diameter of the branch short circuit is formed in the center of the sealing connection cover, and the branch short circuit is connected with the sealing connection cover through the center hole; one end of the connecting sleeve is welded with the main pipe, the other end of the connecting sleeve is welded with the connecting flange, and the connecting flange is connected with the sealing connecting cover.
2. The plastic-lined pipe branch connection structure as claimed in claim 1, wherein: and the flange end of the branch short joint is connected with a medicament pipeline to be injected into the main pipe.
3. The plastic-lined pipe branch connection structure as claimed in claim 1, wherein: one end of the branch short circuit with the elbow extends into the main pipe, the direction of the elbow is along the medium flow direction, and the center of the elbow of the branch short circuit is aligned with the center line of the main pipe.
4. The plastic-lined pipeline branch pipe connecting structure as recited in claim 1, wherein: the part of the branch short joint extending into the main pipe is also provided with external lining plastic.
5. The plastic-lined pipe branch connection structure as claimed in claim 1, wherein: the center of the sealing connection cover is provided with a center hole slightly larger than the outer diameter of the branch short joint, and the branch short joint passes through the center hole and is connected with the sealing connection cover in a sealing and welding manner to form a whole.
6. The plastic-lined pipe branch connection structure as claimed in claim 1, wherein: the branch short joint is welded with the sealing connection cover before the elbow is not welded, then the elbow is welded at the end part of the branch short joint to form a whole, and after the welding is finished, the inner part and the outer part which need to be lined with plastic are lined with plastic.
7. The plastic-lined pipe branch connection structure as claimed in claim 1, wherein: the connecting flange is connected with the sealing connecting cover in a sealing mode through a connecting fastener in a sealing mode.
8. The plastic-lined pipe branch connection structure as claimed in claim 7, wherein: the connecting fastener is a bolt fastener or a gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293608.8A CN115111444A (en) | 2021-03-19 | 2021-03-19 | Plastic-lined pipeline branch pipe connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293608.8A CN115111444A (en) | 2021-03-19 | 2021-03-19 | Plastic-lined pipeline branch pipe connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115111444A true CN115111444A (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110293608.8A Pending CN115111444A (en) | 2021-03-19 | 2021-03-19 | Plastic-lined pipeline branch pipe connecting structure |
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| Country | Link |
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| CN (1) | CN115111444A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789368A (en) * | 2023-02-02 | 2023-03-14 | 山西管家营法兰锻造集团有限公司 | Double-faced flange pipeline connecting structure and connecting method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1679134A1 (en) * | 1989-01-12 | 1991-09-23 | Ivashov Valerij | A method of introducing corrosion and hydrogen-absorption inhibitor into gas line and device therefor |
| CN2169022Y (en) * | 1993-04-28 | 1994-06-15 | 鹤壁市山城区化工设备一厂 | Pipe against corrosion |
| WO2006056499A1 (en) * | 2004-11-25 | 2006-06-01 | Robert Bosch Gmbh | Gas treatment device |
| CN205592651U (en) * | 2016-04-21 | 2016-09-21 | 中石化上海工程有限公司 | Injector |
| CN105972335A (en) * | 2016-05-31 | 2016-09-28 | 广州市华粤管业有限公司 | Plastic-lined flange pipe and manufacturing process |
| CN106032872A (en) * | 2015-03-12 | 2016-10-19 | 刘海涛 | A water delivery pipe chlorination device |
| CN206669197U (en) * | 2017-03-30 | 2017-11-24 | 北京高能时代环境技术股份有限公司 | Geotextile tube bag dewatering process drug feeding pipeline structure |
| CN207539495U (en) * | 2017-10-11 | 2018-06-26 | 中石化上海工程有限公司 | Improve the pipe fitting of erosion corrosion |
-
2021
- 2021-03-19 CN CN202110293608.8A patent/CN115111444A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1679134A1 (en) * | 1989-01-12 | 1991-09-23 | Ivashov Valerij | A method of introducing corrosion and hydrogen-absorption inhibitor into gas line and device therefor |
| CN2169022Y (en) * | 1993-04-28 | 1994-06-15 | 鹤壁市山城区化工设备一厂 | Pipe against corrosion |
| WO2006056499A1 (en) * | 2004-11-25 | 2006-06-01 | Robert Bosch Gmbh | Gas treatment device |
| CN106032872A (en) * | 2015-03-12 | 2016-10-19 | 刘海涛 | A water delivery pipe chlorination device |
| CN205592651U (en) * | 2016-04-21 | 2016-09-21 | 中石化上海工程有限公司 | Injector |
| CN105972335A (en) * | 2016-05-31 | 2016-09-28 | 广州市华粤管业有限公司 | Plastic-lined flange pipe and manufacturing process |
| CN206669197U (en) * | 2017-03-30 | 2017-11-24 | 北京高能时代环境技术股份有限公司 | Geotextile tube bag dewatering process drug feeding pipeline structure |
| CN207539495U (en) * | 2017-10-11 | 2018-06-26 | 中石化上海工程有限公司 | Improve the pipe fitting of erosion corrosion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789368A (en) * | 2023-02-02 | 2023-03-14 | 山西管家营法兰锻造集团有限公司 | Double-faced flange pipeline connecting structure and connecting method |
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