CN114857390A - Bent pipe with petal-shaped structure - Google Patents
Bent pipe with petal-shaped structure Download PDFInfo
- Publication number
- CN114857390A CN114857390A CN202210646415.0A CN202210646415A CN114857390A CN 114857390 A CN114857390 A CN 114857390A CN 202210646415 A CN202210646415 A CN 202210646415A CN 114857390 A CN114857390 A CN 114857390A
- Authority
- CN
- China
- Prior art keywords
- petal
- elbow
- shaped hole
- hole section
- inlet end
- 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.)
- Granted
Links
- 230000003628 erosive effect Effects 0.000 abstract description 31
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000002245 particle Substances 0.000 description 23
- 239000004576 sand Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 230000006378 damage Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 241001184547 Agrostis capillaris Species 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- 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
- F16L43/00—Bends; Siphons
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The elbow with the petal-shaped structure comprises an elbow body, wherein the position of an inlet end or a position close to the inlet end is provided with the petal-shaped hole section through the circulation channel, and the petal-shaped hole section is formed by jointly enclosing four semicircular inner walls, so that the erosion resistance of the elbow body is optimized, and the elbow has the advantages of small technical difficulty, simple manufacturing process and low cost.
Description
Technical Field
The invention relates to the field of gas-solid two-phase flow conveying pipelines, in particular to a bent pipe with a petal-shaped structure.
Background
Erosion is a surface wear destruction process caused by particles carried in a fluid striking a surface at high velocity. The erosion brings great problems to the transportation industry of petroleum, natural gas and the like, the wall surface of the bent pipe is thinned, even the petroleum or the natural gas and the like are leaked due to damage, and the safe operation of equipment is affected. The elbow acts as a flow direction changing component and is more susceptible to failure due to erosion. Studies have shown that the degree of erosion damage at the bend of the transfer conduit is approximately 50 times that of the straight portion. Erosion damage not only wastes materials, consumes energy, reduces equipment efficiency, but also accelerates equipment failure and reduces the service life of the equipment, thereby causing greater economic loss.
At present, methods for improving erosion mainly utilize methods such as composite materials, surface coatings, surface modification and the like to improve the erosion resistance of the bent pipe, and the method can reduce erosion to a certain extent, but has the disadvantages of high manufacturing difficulty, high cost and energy greening.
Disclosure of Invention
Therefore, the invention provides the elbow with the petal-shaped structure to solve the problems, and the elbow comprises an elbow body, wherein the position of the inlet end or the position close to the inlet end is provided with the petal-shaped hole section through the circulating channel, and the petal-shaped hole section is formed by jointly enclosing four semicircular inner walls, so that the erosion resistance of the elbow body is optimized, and the elbow has the advantages of small technical difficulty, simple manufacturing process and low cost.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention provides a bent pipe with a petal-shaped structure, which comprises a bent pipe body, wherein the bent pipe body is provided with an inlet end, an outlet end and a circulation channel for communicating the inlet end and the outlet end, a petal-shaped hole section is formed at the position of the inlet end or the position close to the inlet end of the circulation channel, and the petal-shaped hole section is formed by enclosing four semicircular inner walls together.
The preferred technical scheme of the invention is that the petal-shaped hole section is positioned in the range of a central angle which takes the inlet end as a starting position and extends 0-30 degrees towards the outlet end.
The invention preferably adopts the technical scheme that the extension length of the petal-shaped hole section is the arc length corresponding to the central angle of 5 degrees.
The preferred technical scheme of the invention is that the petal-shaped hole section is positioned in the range of a central angle which takes the inlet end as a starting position and extends 20-30 degrees towards the outlet end.
The invention preferably adopts the technical scheme that the radius of the semicircular inner wall of the petal-shaped hole section is 0.44-0.48 times of the diameter of the flow channel.
The invention preferably has the technical scheme that the flow channel is coaxial with the petal-shaped hole section.
Through the technical scheme provided by the invention, the method has the following beneficial effects:
1. the petal-shaped hole section changes the movement track of particles entering the inner wall surface of the elbow body, reduces the collision frequency of the particles and the inner wall surface, and further reduces erosion.
2. The petal-shaped hole section changes the flow field distribution at the inner wall surface of the elbow body, when fluid flows through the interior of the elbow body, the flow velocity at the inner wall surface of the elbow body is reduced, a low-speed countercurrent circulation area is formed, the inner wall surface of the elbow body is protected, the velocity of particles impacting the inner wall surface of the elbow body is reduced, and therefore erosion is reduced.
3. The petal-shaped hole section not only can improve the anti-erosion characteristic of the interior of the elbow body, but also has the advantages of small technical difficulty, simple manufacturing process and low cost.
Drawings
FIG. 1 is a schematic view of an elbow having a petal-shaped configuration, wherein a portion of the elbow is peeled away to expose the petal-shaped hole segments for the purpose of illustrating the petal-shaped hole segments;
FIG. 2 is a schematic view of an elbow having a petal configuration;
FIG. 3 is a schematic view of a petal-shaped structure;
FIG. 4 is a position of the petal shaped hole segments disposed at a position where θ is in the range of 20 ° -25 °;
FIG. 5 is a graph showing a comparison of maximum erosion rates for a normal bend and a bend having a petal-shaped configuration at θ in the range of 0 to 30 degrees, in which a red dotted line indicates the normal bend and a black broken line indicates the bend having the petal-shaped configuration;
FIG. 6 is a schematic particle trace diagram of a conventional elbow and an elbow having a petal configuration;
FIG. 7 is a schematic diagram of a high-velocity flow region of a conventional elbow and a low-velocity counter-flow region of the elbow having a petal-shaped structure;
in the figure:
1. a bent pipe body; 2. an inlet end; 3. an outlet end; 4. a flow-through channel; 5. petal-shaped hole sections.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 7:
the invention provides a bent pipe with a petal-shaped structure, which comprises a bent pipe body 1, wherein the bent pipe body 1 is provided with an inlet end 2, an outlet end 3 and a circulation channel 4 for communicating the inlet end 2 and the outlet end 3, the circulation channel 4 is provided with a petal-shaped hole section 5 at the position of the inlet end 2 or the position close to the inlet end 2, as shown in figure 3, the petal-shaped hole section 5 is formed by commonly enclosing four semicircular inner walls, through the arrangement, the petal-shaped hole section 5 changes the movement track of particles entering the inner wall surface of the bent pipe body 1, reduces the collision frequency of the particles and the inner wall surface of the bent pipe body 1, further reduces erosion, the petal-shaped hole section 5 also changes the flow field distribution at the inner wall surface of the bent pipe body 1, when fluid flows through the petal-shaped hole section 5, the flow speed at the inner wall surface of the bent pipe body 1 is reduced, a low-speed counter-flow circulation area is formed, and the inner wall surface of the bent pipe body 1 is protected, compared with an anti-erosion method which is high in cost and large in manufacturing difficulty, such as composite materials, coatings, surface modification and the like, the petal-shaped hole section 5 can improve the anti-erosion characteristic of the interior of the elbow body 1 and has the advantages of small technical difficulty, simple manufacturing process and low cost.
Preferably, the petal-shaped hole section 5 is located in a range of a central angle extending 0 to 30 degrees in a direction from the inlet end 2 to the outlet end 3, that is, the inlet end 2 is at an initial position of 0 degrees and is at a position close to the inlet end 2, and thus, the petal-shaped hole section 5 changes a particle motion track entering the inner wall surface of the elbow body 1, reduces the collision frequency of particles with the inner wall surface of the elbow body 1, and further reduces erosion, the petal-shaped hole section 5 also changes the flow field distribution at the inner wall surface of the elbow body 1, when fluid flows through the petal-shaped hole section 5, the flow velocity at the inner wall surface of the elbow body 1 is reduced, a low-speed countercurrent circulation zone is formed, the inner wall surface of the elbow body 1 is protected, and the velocity of particles impacting the inner wall surface of the elbow body 1 is reduced, so that erosion is reduced, compared with an anti-erosion method which is high in cost and large in manufacturing difficulty, such as composite material, coating, surface modification and the like, the petal-shaped hole section 5 can improve the erosion resistance of the interior of the elbow body 1, and the petal-shaped hole section 5 is only arranged in the range of a central angle which takes the inlet end 2 as an initial position and extends 0-30 degrees to the outlet end, so the technical difficulty is smaller, the manufacturing process is simpler, and the cost is lower.
Preferably, the extension length of the petal-shaped hole section 5 is an arc length corresponding to a central angle of 5 degrees, the petal-shaped hole section 5 has the best erosion resistance, and if the extension length of the petal-shaped hole section 5 is greater than the arc length corresponding to the central angle of 5 degrees, the petal-shaped hole section 5 cannot play an erosion resistance role, so that the petal-shaped hole section 5 becomes an erosion area; if the extended length of the petal-shaped hole section 5 is less than the arc length corresponding to the central angle of 5 °, the manufacturing process is difficult, and therefore, it is preferable that the extended length of the petal-shaped hole section 5 is the arc length corresponding to the central angle of 5 °.
Preferably, the petal-shaped hole section 5 is located in the range of the central angle extending 20 ° to 30 ° from the inlet end 2 as the starting position to the outlet end 3, in this embodiment, the material of the elbow body 1 is aluminum, the diameter D of the flow channel is 50mm, and the gas-solid two-phase flow in the elbow body 1 is air and sand respectively. The density of air was 1.18kg/m 3 Viscosity of 1.8X 10 -5 Pa.s, flow rate of 30m/s, sand density of 2650kg/m 3 The sand grain size is 100 μm, the grain mass flow is 0.02kg/s, and the speed of the sand grain entering the elbow pipe body 1 is the same as the continuous phase air flow speed. The radius R of the semicircular inner wall of the petal-shaped hole section 5 is 0.44D, namely the radius R of the semicircular inner wall of the petal-shaped hole section 5 is 22mm, as shown in the figure, theta has certain erosion resistance at different angles, as shown in figures 4 and 5, particularly, the petal-shaped hole section 5 is located at 20-25 degrees, namely 20 degrees is taken as an initial position, the extension length of the petal-shaped hole section 5 is the arc length corresponding to the central angle of 5 degrees, namely, the petal-shaped hole section 5 is located at 20-25 degrees, at the moment, the erosion resistance of the elbow body 1 is improved by 17.27 percent, the best erosion and wear resistance is achieved, in figure 5, the red dotted line indicates that the common elbow is located at the range of 0-30 degrees, and the corresponding maximum erosion and wear resistance is achievedThe black broken line represents the value of the maximum erosion rate corresponding to the bent pipe having a petal-shaped structure in the range of 0 to 30 deg.
In this embodiment, as shown in fig. 4, when the petal-shaped hole section 5 is at the starting position of 20 °, the extension length of the petal-shaped hole section 5 is the arc length corresponding to the central angle of 5 °, that is, the petal-shaped hole section 5 is located at θ of 20 ° -25 °, as shown in fig. 6, the left elbow is a normal elbow, and the right elbow is an elbow having a petal-shaped structure, as can be seen from fig. 6, when the continuous phase gas carrying the solid sand particles flows through the petal-shaped hole section 5 in the right elbow having the petal-shaped structure, the petal-shaped hole section 5 changes the particle trajectory, so that the particles bounce at the semicircular inner wall of the petal-shaped hole section 5, the kinetic energy of the particles is consumed, and further the collision frequency of the particles with the inner wall of the elbow body is reduced, thereby reducing the erosion, while in the left normal elbow, the continuous phase gas carrying the solid sand particles flows, and the particle movement trajectory is substantially straight to erode the inner wall of the elbow, the inner wall surface of the common elbow is easier to damage.
In this embodiment, as shown in fig. 4, when the petal-shaped hole section 5 is at the starting position of 20 °, the extension length of the petal-shaped hole section 5 is the arc length corresponding to the central angle of 5 °, that is, the petal-shaped hole section 5 is located at the angle θ of 20 ° -25 °, in fig. 7, the right side is the bent pipe with the petal-shaped structure, when the continuous phase gas carrying the solid sand particles flows through the petal-shaped hole section 5, the fluid is blocked and moves in the opposite direction, the flow velocity at the inner wall surface of the petal-shaped hole section 5 is reduced, a low-velocity countercurrent circulation region is formed in the petal-shaped hole section, the existence of the region reduces the velocity of the particles colliding with the inner wall surface of the bent pipe body 1, and provides a certain buffer effect for the process of the particles colliding with the wall surface, while the left side is the common bent pipe, it can be seen that when the continuous phase gas carrying the solid sand particles flows through the common bent pipe, the trajectory of the solid sand particles directly impacts the inner wall of the common bent pipe, so that the common bent pipe is more easily eroded.
Preferably, the radius R of the semicircular inner wall of the petal-shaped hole section 5 is 0.44 to 0.48 times the diameter D of the flow channel 4, and such an arrangement is that, for example, when the diameter D of the flow channel 4 is 50mm, the radius R of the semicircular inner wall of the petal-shaped hole section 5 is a value in the range of 0.44D to 0.48D, that is, the radius R of the semicircular inner wall of the petal-shaped hole section 5 is a value in the range of 22mm to 24mm, which corresponds to a reduction of the semicircular inner wall of the petal-shaped hole section 5 by 1mm to 3mm with respect to the radius of the flow channel 4, and the erosion resistance effect is the best when the reduction is within the range, and if the value is less than the range, there is no good erosion resistance effect, and if the value is more than the range, the probability of collision of the particles with the petal-shaped hole section becomes large, which is not favorable for the erosion resistance structure optimization design.
Preferably, the flow channels 4 are coaxial with the petal bore sections 5, and this arrangement determines the attitude of the petal bore sections 5 within the elbow body 1, ensuring that the petal bore sections 5 always have excellent erosion resistance, while also providing excellent erosion resistance to the inner wall surface of the elbow body 1.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides an elbow pipe with petal structure, includes return bend body (1), its characterized in that:
elbow body (1) has circulation passageway (4) of entrance point (2), exit end (3) and intercommunication entrance point (2) and exit end (3), circulation passageway (4) are in the position of entrance point (2) or be close to the position of entrance point (2) is formed with petal shape hole section (5), petal shape hole section (5) are enclosed jointly by four semicircular inner walls and close and form.
2. The elbow having a petal configuration according to claim 1, wherein:
the petal-shaped hole sections (5) are positioned in the range of a central angle which takes the inlet end (2) as an initial position and extends for 0-30 degrees towards the outlet end (3).
3. The elbow having a petal configuration according to claim 2, wherein:
the extension length of the petal-shaped hole section (5) is the arc length corresponding to the central angle of 5 degrees.
4. The elbow having a petal configuration according to claim 3, wherein:
the petal-shaped hole sections (5) are positioned in the range of central angles which extend for 20-30 degrees towards the outlet end (3) by taking the inlet end (2) as an initial position.
5. The elbow having a petal configuration according to claim 1, wherein:
the radius of the semicircular inner wall of the petal-shaped hole section (5) is 0.44-0.48 times of the diameter of the flow channel (4).
6. The elbow having a petal configuration according to claim 1, wherein:
the flow channel (4) is coaxial with the petal-shaped hole section (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210646415.0A CN114857390B (en) | 2022-06-09 | 2022-06-09 | Elbow pipe with petal-shaped structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210646415.0A CN114857390B (en) | 2022-06-09 | 2022-06-09 | Elbow pipe with petal-shaped structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114857390A true CN114857390A (en) | 2022-08-05 |
| CN114857390B CN114857390B (en) | 2024-03-29 |
Family
ID=82625458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210646415.0A Active CN114857390B (en) | 2022-06-09 | 2022-06-09 | Elbow pipe with petal-shaped structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114857390B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539740A (en) * | 2022-09-16 | 2022-12-30 | 集美大学 | Anti erosion bent pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321308A (en) * | 1992-05-25 | 1993-12-07 | Sekisui Chem Co Ltd | Drainage pipe and drainage pipe-line |
| JPH06123384A (en) * | 1992-10-12 | 1994-05-06 | Sekisui Chem Co Ltd | Pipe with inner surface spiral rib and drainage pipe line using this pipe |
| JP2016188663A (en) * | 2015-03-30 | 2016-11-04 | 京セラ株式会社 | Tubular body |
| US20190186669A1 (en) * | 2017-12-18 | 2019-06-20 | National Chung-Shan Institute Of Science And Technology | Curved flow channel with built-in lattice structure |
| CN210004007U (en) * | 2019-05-05 | 2020-01-31 | 浙江万盾制冷股份有限公司 | kinds of corrosion-resistant and impact-resistant elbow pipe |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN215635653U (en) * | 2021-07-22 | 2022-01-25 | 中冶南方武汉建筑设计有限公司 | Energy dissipation return bend |
-
2022
- 2022-06-09 CN CN202210646415.0A patent/CN114857390B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321308A (en) * | 1992-05-25 | 1993-12-07 | Sekisui Chem Co Ltd | Drainage pipe and drainage pipe-line |
| JPH06123384A (en) * | 1992-10-12 | 1994-05-06 | Sekisui Chem Co Ltd | Pipe with inner surface spiral rib and drainage pipe line using this pipe |
| JP2016188663A (en) * | 2015-03-30 | 2016-11-04 | 京セラ株式会社 | Tubular body |
| US20190186669A1 (en) * | 2017-12-18 | 2019-06-20 | National Chung-Shan Institute Of Science And Technology | Curved flow channel with built-in lattice structure |
| CN210004007U (en) * | 2019-05-05 | 2020-01-31 | 浙江万盾制冷股份有限公司 | kinds of corrosion-resistant and impact-resistant elbow pipe |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN215635653U (en) * | 2021-07-22 | 2022-01-25 | 中冶南方武汉建筑设计有限公司 | Energy dissipation return bend |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539740A (en) * | 2022-09-16 | 2022-12-30 | 集美大学 | Anti erosion bent pipe |
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| Publication number | Publication date |
|---|---|
| CN114857390B (en) | 2024-03-29 |
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