CN219933334U - Elbow guide plate structure for adjusting flow state - Google Patents
Elbow guide plate structure for adjusting flow state Download PDFInfo
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- CN219933334U CN219933334U CN202321209847.1U CN202321209847U CN219933334U CN 219933334 U CN219933334 U CN 219933334U CN 202321209847 U CN202321209847 U CN 202321209847U CN 219933334 U CN219933334 U CN 219933334U
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- guide plate
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- bent pipe
- arc guide
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000005452 bending Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The utility model provides a bent pipe guide plate structure for adjusting flow state, wherein an arc guide pipe is arranged in a bent pipe section of a bent pipe, front straight plates and rear straight plates are respectively arranged at two ends of the arc guide pipe, the front straight plates extend into the front straight section of the bent pipe, and the rear straight plates extend into the rear straight section of the bent pipe, so that the arc guide plate is in a smooth state on disturbance of a flow field. The arc honeycomb duct includes inboard arc guide plate and outside arc guide plate, inboard arc guide plate set up in the inboard of the concentric circles of bend section, outside arc guide plate set up in the outside of the concentric circles of bend section, inboard arc guide plate with have the interval between the arc guide plate in the outside. The utility model has the advantages that the flow field uniformity is obviously improved, the energy loss is greatly reduced, the water flow direction can be timely adjusted, and the occurrence of vortex and secondary flow is obviously reduced or even avoided by arranging the guide plate in the bent pipe.
Description
Technical Field
The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a bent pipe guide plate structure for adjusting flow state.
Background
In hydraulic and hydroelectric engineering, various bent pipes are often encountered in a water delivery system, such as a plane turning pipeline of a line of the water delivery system, a vertical turning pipeline of a pressure pipeline, which is connected with a vertical shaft, and the like. The current elbow design generally obtains a relatively better flow field as much as possible by increasing the turning radius as much as possible, reducing the turning deflection angle and ensuring the length of a straight line segment behind the elbow, thereby reducing the head loss as much as possible. However, along with the continuous progress of hydropower construction, some project elbow designs are difficult to ensure due to the limitation of external boundary conditions, turning radius, deflection angle and length of front and rear straight line segments, water flow state in the elbow is poor, vortex and secondary flow are easy to form, the water flow direction in the elbow is suddenly turned to impact the pipe wall, water flow is subjected to the adjustment process of congestion, deceleration, turning and acceleration, and the process water flow generates larger local head loss at the elbow.
Disclosure of Invention
The utility model aims to provide a bent pipe guide plate structure which is simple and effective in adjusting and improving the water flow state in a bent pipe and reducing the local head loss.
For this purpose, the utility model adopts the following technical scheme:
the utility model provides an elbow guide plate structure of adjustment flow state sets up the arc guide plate in the bend section of elbow, arc guide plate both ends set up straight board before and back straight board respectively, in the straight section before preceding straight board stretches into the elbow, back straight board stretches into in the straight section behind the elbow, so that the disturbance of arc guide plate to the flow field is smooth-going state.
Further: the lengths of the front straight plate and the rear straight plate are 0.3-0.5 times of the pipe diameter of the bent pipe.
Further: the thickness of the arc-shaped guide plate is 8-12mm.
Further: the arc guide plate comprises an inner arc guide plate and an outer arc guide plate, wherein the inner arc guide plate is arranged on the inner side of the concentric circle of the bent pipe section, the outer arc guide plate is arranged on the outer side of the concentric circle of the bent pipe section, and a space is reserved between the inner arc guide plate and the outer arc guide plate.
Further: the inner arc-shaped guide plate is positioned in a region of one half of the distance between the concentric circles and the inner curved wall body by taking the concentric circles of the curved pipe section as the reference; the outer arc-shaped guide plate is positioned in a region of one half of the distance between the concentric circles and the outer curved wall body by taking the concentric circles of the curved pipe section as the reference.
Further: the inner arc-shaped guide plate and the inner bent wall body of the bent pipe section are separated, and the outer arc-shaped guide plate and the outer bent wall body of the bent pipe section are separated.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model has the advantages that the flow field uniformity is obviously improved, the energy loss is greatly reduced, the water flow direction can be timely adjusted, and the occurrence of vortex and secondary flow is obviously reduced or even avoided by arranging a certain number of guide plates with a certain shape in the bent pipe.
Drawings
FIG. 1 is a schematic view of the structure of an elbow and its internal flow state when a deflector is provided in the present utility model;
FIG. 2 is a schematic view of the flow pattern in an elbow without a baffle according to the present utility model.
The marks in the drawings are: 1-a front straight section of the bent pipe; 2-bending a pipe section; 3-bending the rear straight section of the pipe; 4-an inner arc-shaped guide plate; 5-an outer arc-shaped deflector; 6-a first front straight plate; 7-a first rear straight plate; 8-a second front straight plate; 9-a second rear straight plate; 10-flow line.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
As shown in fig. 1-2, a set of arc-shaped guide plates are arranged in a bent pipe section 2 of a bent pipe, two ends of each arc-shaped guide plate are respectively provided with a front straight plate and a rear straight plate, the front straight plate stretches into a front straight section 1 of the bent pipe, and the rear straight plate stretches into a rear straight section 3 of the bent pipe, so that the disturbance of the arc-shaped guide plates to a flow field is in a smooth state.
In this embodiment, as shown in fig. 2, in order to reduce the water flow blocking, the number of arc-shaped baffles is not excessive, and two arc-shaped baffles are preferably provided. It should be noted that, in this embodiment, the arc-shaped baffle includes an inner arc-shaped baffle 4 and an outer arc-shaped baffle 6, the inner arc-shaped baffle 4 is disposed on the inner side of the concentric circle of the curved pipe section 2, the outer arc-shaped baffle 6 is disposed on the outer side of the concentric circle of the curved pipe section 2, and a space is provided between the inner arc-shaped baffle 4 and the outer arc-shaped baffle 6.
The inner arc-shaped guide plate 4 is positioned in a region of one half of the distance between the concentric circles and the inner curved wall body by taking the concentric circles of the curved pipe section 2 as the reference; the outer arc-shaped guide plate 6 is positioned in the area of the concentric circle, which is one half of the distance between the concentric circle and the outer curved wall body, by taking the concentric circle of the curved pipe section 2 as a reference. It should be noted that, the distance between the inner arc-shaped guide plate 4 and the inner pipe wall of the pipe bending section 2 is one fourth of the pipe diameter of the pipe bending section 2, and the distance between the outer arc-shaped guide plate 6 and the outer pipe wall of the pipe bending section 2 is one fourth of the pipe diameter of the pipe bending section 2.
In this embodiment, the thickness of each arcuate baffle is preferably 10mm.
Specifically, with the flow direction of the water flowing in the elbow pipe as a reference, the front end and the rear end of the inner arc-shaped guide plate 4 are respectively provided with a small section of first front straight plate 6 and a small section of first rear straight plate 7, and the front end and the rear end of the outer arc-shaped guide plate 6 are respectively provided with a small section of second front straight plate 8 and a small section of second rear straight plate 9. Wherein, the length of the front straight plate and the rear straight plate of each arc-shaped guide plate is 0.4 times of the pipe diameter of the bent pipe. Therefore, the disturbance of the arc-shaped flow guide plate to the flow field can be reduced, and the flow state in the pipeline is further improved.
Referring to fig. 1-2, in this embodiment, by arranging the inner arc-shaped baffle 4 and the outer arc-shaped baffle 6 in the bent pipe section 2, the formation and development of vortex and secondary flow are limited, specifically, when water flows through the straight section 1 before the bent pipe, the water flows into the bent pipe section 2, through the adjustment actions of the inner arc-shaped baffle 4 and the outer arc-shaped baffle 6, the water flows into the straight section 3 after the bent pipe are uniformly distributed, and the streamline 10 is smoother, so that the generation and development of vortex and secondary flow in the bent pipe can be effectively limited, the flow state of the water flow in the bent pipe can be effectively adjusted and improved, and the local head loss is reduced.
The above embodiment is only one preferred technical solution of the present utility model, and it should be understood by those skilled in the art that modifications and substitutions can be made to the technical solution or parameters in the embodiment without departing from the principle and essence of the present utility model, and all the modifications and substitutions are covered in the protection scope of the present utility model.
Claims (6)
1. The utility model provides an elbow guide plate structure of adjustment flow state which characterized in that: an arc-shaped guide plate is arranged in a bent pipe section (2) of the bent pipe, a front straight plate and a rear straight plate are respectively arranged at two ends of the arc-shaped guide plate, the front straight plate stretches into a front straight section (1) of the bent pipe, and the rear straight plate stretches into a rear straight section (3) of the bent pipe, so that the arc-shaped guide plate is in a smooth state on disturbance of a flow field.
2. The elbow baffle structure for adjusting flow state according to claim 1, wherein: the lengths of the front straight plate and the rear straight plate are 0.3-0.5 times of the pipe diameter of the bent pipe.
3. The elbow baffle structure for adjusting flow state according to claim 1, wherein: the thickness of the arc-shaped guide plate is 8-12mm.
4. The elbow baffle structure for adjusting flow state according to claim 1, wherein: the arc guide plate comprises an inner arc guide plate (4) and an outer arc guide plate (6), wherein the inner arc guide plate (4) is arranged on the inner side of the concentric circle of the bent pipe section (2), the outer arc guide plate (6) is arranged on the outer side of the concentric circle of the bent pipe section (2), and a gap is reserved between the inner arc guide plate (4) and the outer arc guide plate (6).
5. The elbow baffle structure for adjusting flow state according to claim 4, wherein: the inner arc-shaped guide plate (4) is positioned in a region of one half of the distance between the concentric circles and the inner bent wall body by taking the concentric circles of the bent pipe section (2) as the reference; the outer arc-shaped guide plate (6) is positioned in a region of one half of the distance between the concentric circles and the outer bent wall body by taking the concentric circles of the bent pipe section (2) as the reference.
6. The elbow baffle structure for adjusting flow state according to claim 4, wherein: the inner arc-shaped guide plate (4) is spaced from the inner bent wall body of the bent pipe section (2), and the outer arc-shaped guide plate (6) is spaced from the outer bent wall body of the bent pipe section (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321209847.1U CN219933334U (en) | 2023-05-18 | 2023-05-18 | Elbow guide plate structure for adjusting flow state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321209847.1U CN219933334U (en) | 2023-05-18 | 2023-05-18 | Elbow guide plate structure for adjusting flow state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219933334U true CN219933334U (en) | 2023-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321209847.1U Active CN219933334U (en) | 2023-05-18 | 2023-05-18 | Elbow guide plate structure for adjusting flow state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219933334U (en) |
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2023
- 2023-05-18 CN CN202321209847.1U patent/CN219933334U/en active Active
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