CN112253878A - Novel semicircle formula low temperature expansion joint - Google Patents
Novel semicircle formula low temperature expansion joint Download PDFInfo
- Publication number
- CN112253878A CN112253878A CN202011243287.2A CN202011243287A CN112253878A CN 112253878 A CN112253878 A CN 112253878A CN 202011243287 A CN202011243287 A CN 202011243287A CN 112253878 A CN112253878 A CN 112253878A
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- CN
- China
- Prior art keywords
- wave node
- wave
- expansion joint
- flue
- node body
- Prior art date
- 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.)
- Pending
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation
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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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
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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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a semicircular arc type low-temperature novel expansion joint, which belongs to the technical field of flue gas desulfurization and comprises a plurality of wave nodes connected end to end in sequence, wherein each wave node comprises an arc-shaped wave node body and a first connecting part extending to the horizontal direction of two sides through the wave node body, and a second connecting part welded with the wave node body and the first connecting part into a whole is arranged above the wave node at the first section and below the wave node at the tail section. The smooth inner wall of the wave node body has good flow guiding effect, internal drying, no water accumulation and no corrosion can be ensured, and the generated effective stretching deformation can sufficiently compensate the temperature difference of the flue and the additional stress caused by mechanical vibration under the condition of low temperature, so that the wave node body is suitable for the flue gas desulfurization flue.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a semi-circular arc type low-temperature novel expansion joint.
Background
At present, a low-temperature coal economizer is generally added to a power plant, and a plurality of metal or nonmetal expansion joints are arranged behind the low-temperature coal economizer and in a flue gas system from the flue gas outlet of the power plant. Because the flue gas contains certain moisture, the flue gas is condensed into a highly corrosive liquid when meeting cold, and part of the highly corrosive liquid is deposited at the lower part, particularly the expansion joint, so that corrosion leakage is caused.
In the prior art, most of the traditional expansion joints for desulfurization adopt rubber expansion joints, and the side part of dry flue gas adopts metal expansion joints. The design life of the rubber expansion joint is generally 4 years, the rubber expansion joint has uneven stress, the problems of sizing material formula, vulcanization process and the like, and the bonding of a rubber body of the rubber expansion joint with a framework, cord fabric and the like at key parts is easy to crack, age and damage; the metal expansion joint adopts double-wave joints, and the corrosion perforation phenomenon is easy to occur due to the large folding angle and the excessive extension of the outer side material.
Disclosure of Invention
The invention aims to provide a semi-circular arc type low-temperature expansion joint which is suitable for a low-temperature desulfurization environment and has long service life.
The technical scheme of the invention is as follows: the utility model provides a novel expansion joint of semicircle formula low temperature, includes the wave node that a plurality of head and the tail connected gradually, the wave node includes convex wave node body, through the first connecting portion that the wave node body extends to both sides horizontal direction, the top of head segment wave node and the below of tail segment wave node be equipped with wave node body, the first connecting portion weld second connecting portion as an organic whole.
In a further technical scheme, the material of the wave node is duplex stainless steel.
In a further technical scheme, the central angle corresponding to the arc length of the arc-shaped wave node body is 140 degrees.
The invention has the beneficial effects that:
1. the preparation is convenient: the traditional expansion joint comprises a steel frame and a flange, and needs to be manufactured strictly according to the size, so that the process is multiple and the workload is large; the invention only needs to manufacture standard metal nodes;
2. the transportation is convenient: the traditional expansion joint needs to be integrally transported after being manufactured, has large volume and needs to be transported by special vehicles; the nodes can be stacked and then packaged for transportation without special vehicles;
3. the installation is simple: the traditional expansion joint is provided with a steel frame and a flange, so that a crane is required to move during installation, a high scaffold is required to be erected during high-altitude installation, and the workload is large; the invention adopts the splicing installation of single nodes, the weight of the single node is light, and the single node can be easily carried; when the flue is installed, only a scaffold is erected inside the flue, so that the workload is small;
4. the service life is long: the service life of the traditional expansion joint is generally 4 years, and the smooth inner wall of the wave joint body has good flow guide effect, so that the interior can be dry, no accumulated water exists and the wave joint is not corroded; the wave node is made of corrosion-resistant materials, and the expected service life can exceed ten years;
5. the use is flexible: the traditional expansion joint needs to be manufactured according to the size strictly, and the expansion joints with different sizes cannot be replaced; the invention adopts standard metal nodes, can cut and splice according to the field condition and has higher flexibility.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic cross-sectional view of fig. 1.
The wave node comprises a wave node body 1, a wave node body 2, a first connecting portion 3 and a second connecting portion.
Detailed Description
The invention will be further illustrated and understood by the following non-limiting examples.
As shown in fig. 1-2, the novel semicircular arc type low-temperature expansion joint is installed at an inlet and an outlet of an induced draft fan and a booster fan, an original flue and a clean flue of a desulfurization absorption tower, each expansion joint comprises a plurality of wave joints which are sequentially connected end to end, and the wave joints are made of duplex stainless steel, such as 2205 stainless steel; the wave node comprises a circular arc-shaped wave node body 1 and first connecting parts 2 extending to the two sides of the wave node body 1 in the horizontal direction, and the central angle corresponding to the arc length of the circular arc-shaped wave node body 1 is 140 degrees;
when the expansion joint is installed on site, the original traditional expansion joint is cut, then the first connecting part 2 of each joint is welded on the wall of the residual pipeline of the flue on site, and finally the second connecting parts 3 are welded above the first section of the expansion joint and below the tail section of the expansion joint, so that the expansion joint and the joint body 1 and the first connecting part 2 form an integral structure respectively.
In the invention, because the structure of a single node is simple and the weight is light, under the condition of low temperature, the generated effective telescopic deformation is enough to compensate the temperature difference of the flue and the additional stress caused by mechanical vibration, because the node body 1 adopts the circular arc design and is arranged at the inlet and the outlet of the induced draft fan and the booster fan as well as the original flue and the clean flue of the desulfurization absorption tower, the smooth inner wall of the node body 1 has good flow guiding function, the inner part of the pipe wall can be ensured to be dry, free of accumulated water and free of corrosion.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (3)
1. The utility model provides a novel expansion joint of semicircle formula low temperature which characterized in that: the wave node comprises a plurality of wave nodes which are sequentially connected end to end, the wave nodes comprise circular arc-shaped wave node bodies and first connecting portions which extend to the horizontal directions of the two sides through the wave node bodies, and second connecting portions which are welded into a whole with the wave node bodies and the first connecting portions are arranged above the wave nodes at the first section and below the wave nodes at the tail section.
2. The novel semicircular arc type low-temperature expansion joint as claimed in claim 1, wherein: the material of the wave node is duplex stainless steel.
3. The novel semicircular arc type low-temperature expansion joint as claimed in claim 1, wherein: the central angle corresponding to the arc length of the arc-shaped wave node body is 140 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011243287.2A CN112253878A (en) | 2020-11-10 | 2020-11-10 | Novel semicircle formula low temperature expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011243287.2A CN112253878A (en) | 2020-11-10 | 2020-11-10 | Novel semicircle formula low temperature expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253878A true CN112253878A (en) | 2021-01-22 |
Family
ID=74266699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011243287.2A Pending CN112253878A (en) | 2020-11-10 | 2020-11-10 | Novel semicircle formula low temperature expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112253878A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110289A (en) * | 2022-01-26 | 2022-03-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
-
2020
- 2020-11-10 CN CN202011243287.2A patent/CN112253878A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110289A (en) * | 2022-01-26 | 2022-03-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
| CN114110289B (en) * | 2022-01-26 | 2022-04-29 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
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