Combined flow regulator for fluid pipeline system and fluid pipeline system

Abstract

The invention discloses a combined flow regulator for a fluid pipeline system and the fluid pipeline system.The combined flow regulator comprises three stages of rectifying sections and two sections of rectifying cavities, and the first-stage rectifying section is a nested combination of a V-shaped flow guide cone, a flow guide blade and a hollow reducing cylinder; and a plurality of flow guide holes which are distributed along the center of the pipeline in an array manner and have different diameters are formed in the side wall of the variable-diameter cylinder. The second-stage rectification section is of a combined structure formed by alternately arranging grid pore plates and streamline blades, and blade sets with different angles with the previous blade set are arranged in a staggered mode. And the third-stage rectification section is a hexagonal straightening hole channel. The first rectifying cavity is of a first-expanding and second-shrinking structure, the expanding section and the shrinking section are consistent in length, and the inlet and outlet diameters are consistent. By optimizing the runner structure and adjusting the flowing direction, the invention aims to improve the flowing characteristics of fluid behind disturbing flow pieces such as a bent pipe and a valve and reduce non-uniform flowing, so that the performance and the energy efficiency of a pipeline system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of fluid pipelines, and in particular to a combined flow regulator for optimizing the flow technology of a fluid pipeline system. Background Art

[0002] In fluid flow piping systems, flow-disturbing components such as elbows, valves, and deformed pipes often have a significant impact on the stability of the flow in the pipe, making it difficult to meet the requirements for collecting stable and accurate flow metering signals from flow-disturbing components at close range. Installing a rectifier has become an effective way to optimize the current flow field. This effectively improves the inflow conditions, stabilizes the flow field within a shorter flow distance, significantly improves the accuracy of flow metering, and reduces fluid transportation costs. Although rectifiers have a certain effect in improving flow stability, traditional rectifier structures often cannot effectively cope with characteristic flows such as eccentric jets after process valves, and their rectification effect is limited. Compared with the classic regulator structure, the combined flow regulator exhibits better performance. The existing technology mainly focuses on making simple improvements to the classic orifice plate and blade structures, usually by changing the orifice plate aperture and the focusing angle in order to form a uniform flow, while there is less research on innovative structures such as reintegration of the incoming flow, redivision of the flow channel, and guidance of fluid flow. For example, in the design of CN117869794A-multi-stage composite rectifier and fluid pipeline transportation system, a commonly used swirling structure is used for the incoming flow, which is also the idea used by most combined rectifiers at present. Although this structure can improve the stability of the flow, it may also cause local uneven vortices, and does not take into account the vortex problem at the tail of the second-stage guide blade. Summary of the invention

[0003] The purpose of the embodiment of the present application is to provide a combined flow regulator for optimizing the flow technology of a fluid pipeline system, so as to solve the technical problems of eccentric flow, vortex flow and other disturbances after the valve or in the pipeline in the related technology and the technical problem of poor effect of ordinary rectifiers. The embodiment of the present application adjusts the flow direction and velocity distribution of the fluid to effectively reduce turbulence and unevenness in the flow, thereby significantly improving the overall efficiency and performance of the system.

[0004] According to a first aspect of an embodiment of the present application, a multi-stage combined rectifier is provided, comprising: A first-stage rectifying section, the first-stage rectifying section comprises a first rectifying tube and a V-shaped guide cone, a first-stage guide blade, and a hollow reducer installed in the first rectifying tube and arranged in sequence along the fluid flow direction, the V-shaped guide cone is fixed to the inflow end of the hollow reducer, a plurality of the first-stage guide blades are evenly distributed in an annular shape around the V-shaped guide cone on the tube wall at the end of the expansion section of the first rectifying tube, a plurality of the first-stage guide blades are fixed at one end close to the central axis of the flow channel on the hollow reducer, a plurality of evenly distributed first rectifying holes are opened on the front end side wall of the hollow reducer, and a plurality of evenly distributed second rectifying holes are opened on the rear end side wall; The second-stage rectifying section includes a second rectifying tube and second-stage guide vanes, a thin-walled sleeve and a square grid hole plate installed in the second rectifying tube, wherein the grid hole plate and the second-stage guide vanes are alternately arranged along the axial direction of the pipeline, and a blade group with a different angle from the first-stage guide vanes is staggered, a plurality of thin-walled sleeves with unequal diameters are arranged at equal distances along the radial direction of the pipeline, and the second-stage guide vanes are evenly divided by the thin-walled sleeve and then fixed on the inner wall of the second rectifying tube; A third-stage rectifying section, the third-stage rectifying section comprising a third rectifying tube and a honeycomb rectifying structure fixed in the third rectifying tube; A first rectifying cavity, communicating the first rectifying section and the second rectifying section; The second rectifying cavity is connected with the second-stage rectifying section and the third-stage rectifying section.

[0005] Furthermore, the outlet diameter of the first rectifying cavity is equal to the inlet diameters of the first rectifying section and the second rectifying section, both of which are D1; the diameter of the second rectifying cavity is equal to the diameter at the connection between the second rectifying section and the third rectifying section, both of which are D2.

[0006] Furthermore, the length of the first rectifying cavity is h1, h1=0.25D1, and the length of the second rectifying cavity is h2, h2=0.25D2.

[0007] Furthermore, the first rectifier tube 1 is a variable diameter structure that expands first and then contracts, the maximum diameter of the expanded tube is D1, the minimum diameter of the contracted tube is D2, the lengths of the expansion section and the contraction section are equal, both of which are 0.5D1, and the inlet and outlet diameters of the first rectifier tube are equal, both of which are D2.

[0008] Furthermore, there is an inclination angle θ1 between the hollow reducing cylinder and the central axis of the flow channel, 0<θ1<90°.

[0009] Furthermore, there is an inclination angle θ2 between the middle of the first-stage guide vane and the central axis of the flow channel, 0<θ2<90°.

[0010] Further, the diameter of the first rectifying hole is d1, the diameter of the second rectifying hole is d2, and d2>d1.

[0011] Furthermore, the tail of the first-stage guide vane and the second-stage guide vane are both streamlined in design.

[0012] According to a second aspect of an embodiment of the present application, a fluid pipeline system is provided, comprising the multi-stage combined rectifier described in the first aspect.

[0013] Furthermore, the multi-stage combined rectifier is located behind the flow-disturbing component of the fluid pipeline system.

[0014] The technical solution provided by the embodiments of the present application may have the following beneficial effects: It can be seen from the above embodiments that the present application adopts a multi-stage segmented rectification. When the fluid passes through the first-stage rectification section, the first rectification tube is a structure that expands first and then contracts. When the fluid passes through the expansion section, the fluid is subject to the guiding effect of the V-shaped guide cone and the uniform division of the flow channel by the first-stage guide blades, as well as the effect of the first-stage rectification holes uniformly distributed on the side wall of the reducer around the central axis. The flow velocity is slowed down, especially the fluid in the boundary layer is eased, thereby reducing the formation of eccentric flow and reducing the non-uniformity in the flow. As the fluid enters the contraction part, the flow velocity increases and the flow efficiency improves. The local eccentric jet at the edge of the flow channel will change the flow direction and converge toward the central axis of the pipeline. The second-stage rectification holes can ensure that the fluid enters the second-stage rectification section in an orderly manner, avoiding energy loss caused by a sudden drop in local pressure or excessive local flow velocity, thereby achieving preliminary rectification of the fluid. When the fluid passes through the second-stage rectifying section, the grid plate maintains the stability of the fluid flow, and the staggered streamlined blades guide the fluid flow, reduce the flow resistance, reduce the uneven flow velocity and the generation of vortices at the tail of the blades, and further achieve the re-rectification of the fluid. When the fluid passes through the third-stage rectifying section, the regular channel structure allows the fluid to flow in a consistent direction and flow velocity when passing through, and the downstream flow efficiency and stability are further improved. Through the multi-stage segmented rectification of the first, second, and third-stage rectifying sections, the flow stability and uniformity of the fluid are improved to the greatest extent within a shorter pipeline distance. It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0016] Figure 1 A schematic diagram of the structure of a multi-stage combined rectifier provided in an embodiment of the present invention.

[0017] Figure 2 Dimensional diagram of a multi-stage combined rectifier provided in an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the structure of the first-stage rectifying section provided in an embodiment of the present invention. (a) is a three-dimensional diagram, and (b) is a left side view.

[0019] Figure 4 A schematic diagram of the structure of the second-stage rectifying section provided in an embodiment of the present invention. (a) is a three-dimensional diagram, and (b) is a left side view.

[0020] Figure 5 Schematic diagram of the grille-type perforated plate structure provided by an embodiment of the present invention. (a) is a stereogram, and (b) is a left view.

[0021] Figure 6 A schematic diagram of the structure of the third-stage rectifying section provided in an embodiment of the present invention. (a) is a three-dimensional diagram, and (b) is a left side view.

[0022] Figure 7 A schematic structural diagram and dimensional diagram of the first-stage guide vane and hollow reducer provided in an embodiment of the present invention.

[0023] Figure 8 A schematic diagram of a streamlined blade structure provided in an embodiment of the present invention.

[0024] Reference numerals: 1. First rectifier tube; 2. Second rectifier tube; 3. Third rectifier tube; 4. V-shaped guide cone; 5. First-stage guide vane; 6. Hollow reducer; 7. Second-stage guide vane; 8. Thin-walled sleeve; 9. Grid-type orifice plate; 10. Honeycomb straightener; 11. First rectifier cavity; 12. Second rectifier cavity; 13. First rectifier hole; 14. Second rectifier hole. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0027] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0028] refer to Figure 1-Figure 8 The embodiment of the present invention provides a combined flow regulator, comprising: a first-stage rectifying section, a second-stage rectifying section, a third-stage rectifying section, a first rectifying cavity 11 and a second rectifying cavity 12, wherein: The first-stage rectifying section includes a first rectifying tube 1 and a V-shaped guide cone 4, a first-stage guide blade 5, and a hollow reducer 6 installed in the first rectifying tube 1 and arranged in sequence along the fluid flow direction, the V-shaped guide cone 4 is fixed to the inflow end of the hollow reducer 6, a plurality of the first-stage guide blades 5 are evenly distributed in a ring around the V-shaped guide cone 4 on the tube wall at the end of the expansion section of the first rectifying tube 1, a plurality of the first-stage guide blades 5 are fixed at one end close to the central axis of the flow channel to the hollow reducer 6, a plurality of evenly distributed first rectifying holes 13 are opened on the front end side wall of the hollow reducer 6, and a plurality of evenly distributed second rectifying holes 14 are opened on the rear end side wall.

[0029] In one embodiment, the V-shaped guide cone 4 may be a solid structure, fixed to the flow inlet end of the hollow reducer 6 .

[0030] The second-stage rectifying section includes a second rectifying tube 2 and second-stage guide vanes 7, a thin-walled sleeve 8 and a square grid hole plate installed in the second rectifying tube 2. The grid hole plate and the second-stage guide vanes 7 are alternately arranged along the axial direction of the pipeline, and a blade group with a different angle from the first-stage guide vanes 5 is staggered. A plurality of thin-walled sleeves 8 of unequal diameters are arranged at equal distances along the radial direction of the pipeline. The second-stage guide vanes 7 are evenly divided by the thin-walled sleeve 8 and then fixed on the inner wall of the second rectifying tube 2.

[0031] The third-stage rectifying section includes a third rectifying tube 3 and a honeycomb rectifying structure fixed inside the third rectifying tube 3 .

[0032] In one embodiment, the honeycomb type rectifying structure includes a plurality of rectifying tubes with hexagonal openings, and the honeycomb type rectifying structure is nested and connected inside the third rectifying tube 3 .

[0033] The first rectifying cavity 11 is connected to the first rectifying section and the second rectifying section; the second rectifying cavity 12 is connected to the second rectifying section and the third rectifying section.

[0034] In this embodiment, the outlet diameter of the first rectifying cavity 11 is equal to the inlet diameters of the first rectifying section and the second rectifying section, and the diameter of the second rectifying cavity 12 is equal to the diameter at the connection between the second rectifying section and the third rectifying section connected to its two ends, and the length is D2. The length of the first rectifying cavity 11 is h1, h1=0.25D1, and the length of the second rectifying cavity 12 is h2, h2=0.25D2.

[0035] In this embodiment, the first rectifier tube 1 is a variable diameter structure that expands first and then contracts. The maximum diameter of the expanded tube is D1, and the minimum diameter of the contracted tube is D2. The lengths of the expansion section and the contraction section are equal, both of which are 0.5D1. The inlet and outlet diameters of the first rectifier tube 1 are equal, both of which are D2.

[0036] In this embodiment, there is an inclination angle θ1 between the hollow reducer 6 and the central axis of the flow channel, 0<θ1<90°, there is an inclination angle θ2 between the middle part of the first-stage guide vane 5 and the central axis of the flow channel, 0<θ2<90°, the diameter of the first rectifying hole 13 is d1, the diameter of the second rectifying hole 14 is d2, d2>d1, θ2=θ1. When the fluid passes through the first-stage rectifying section, the first rectifying tube 1 is a structure that expands first and then contracts. When the fluid passes through the expanding tube section, the fluid is guided by the V-shaped guide cone 4 and the uniform division of the flow channel by the first-stage guide blade 5, as well as the first-stage rectifying holes uniformly distributed around the central axis on the side wall of the reducer. The flow velocity is slowed down, especially the fluid in the boundary layer is eased, thereby reducing the formation of eccentric flow and reducing the non-uniformity in the flow. As the fluid enters the contraction part, the flow velocity increases and the flow efficiency improves. The local eccentric jet at the edge of the flow channel will change the flow direction and converge to the central axis of the pipeline. The second-stage rectifying holes can ensure that the fluid enters the second-stage rectifying section in an orderly manner, avoiding energy loss caused by a sudden drop in local pressure or excessive local flow velocity, and realizing preliminary rectification of the fluid.

[0037] In this embodiment, the diameters of the thin-walled sleeve 8 are respectively D3 and D4, and the plate thickness is less than 2 mm. The grid plate structure is symmetrically designed, and the plate thickness is less than 2 mm. The tail of the first-stage guide vane 5 and the second-stage guide vane 7 are both streamlined. When the fluid passes through the second-stage rectifying section, the grid plate maintains the stability of the fluid flow, and the staggered streamlined blades guide the fluid flow, reduce the flow resistance, reduce the uneven flow velocity and the generation of vortices at the tail of the blades, and further realize the re-rectification of the fluid.

[0038] In this embodiment, the wall thickness of the straightening tube of the hexagonal straightening channel is less than 0.2 mm. When the fluid passes through the third-stage straightening section, the regular channel structure allows the fluid to flow in a consistent direction and flow rate, and the downstream flow efficiency and stability are further improved.

[0039] As can be seen from the above embodiments, the present invention is located behind the flow-disturbing components of the fluid pipeline delivery system. By reintegrating the incoming flow, re-dividing the flow channel, and optimizing the blade structure, the eccentric jet, vortex, and local flow instability problems caused by flow-disturbing components such as bends, valves, and variable-section pipes in the fluid pipeline delivery system can be solved within a short distance.

[0040] The combined rectifier adopts multi-stage segmented rectification. When the fluid passes through the first-stage rectification section, the first rectification tube 1 is a structure that expands first and then contracts. When the fluid passes through the expansion section, the fluid is guided by the V-shaped guide cone 4 and the uniform division of the flow channel by the first-stage guide blade 5, as well as the first-stage rectification holes uniformly distributed on the side wall of the reducer around the central axis. The flow velocity is slowed down, especially the fluid in the boundary layer is eased, thereby reducing the formation of eccentric flow and reducing the non-uniformity in the flow. As the fluid enters the contraction part, the flow velocity increases and the flow efficiency improves. The local eccentric jet at the edge of the flow channel will change the flow direction and converge to the central axis of the pipeline. The second-stage rectification holes can ensure that the fluid enters the second-stage rectification section in an orderly manner, avoiding energy loss caused by a sudden drop in local pressure or excessive local flow velocity, thereby achieving preliminary rectification of the fluid. When the fluid passes through the second-stage rectifying section, the grid plate maintains the stability of the fluid flow, and the staggered streamlined blades guide the fluid flow, reduce the flow resistance, reduce the uneven flow velocity and the generation of vortices at the tail of the blades, and further realize the re-rectification of the fluid. When the fluid passes through the third-stage rectifying section, the regular channel structure allows the fluid to flow in a consistent direction and flow rate when passing through, and the flow efficiency and stability of the downstream are further improved. The first-stage rectifying section can not only guide the incoming flow to flow in the variable diameter structure, but also re-divide the flow channel, and the fluid velocity is also adjusted in time. At the same time, the streamlined design of the blades can reduce the formation and accumulation of vortices at the tail of the blades. Through the multi-stage segmented rectification of the first, second, and third-stage rectifying sections, the flow stability and uniformity of the fluid are improved to the greatest extent within a shorter pipeline distance.

[0041] The embodiment of the present invention also provides a fluid pipeline system, comprising the above-mentioned multi-stage combined rectifier. Further, the multi-stage combined rectifier is located behind the flow-disturbing component of the fluid pipeline system.

[0042] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims.

[0043] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A multi-stage combined rectifier, characterized in that: include: A first-stage rectifying section, the first-stage rectifying section comprises a first rectifying tube and a V-shaped guide cone, a first-stage guide blade, and a hollow reducer installed in the first rectifying tube and arranged in sequence along the fluid flow direction, the V-shaped guide cone is fixed to the inflow end of the hollow reducer, a plurality of the first-stage guide blades are evenly distributed in an annular shape around the V-shaped guide cone on the tube wall at the end of the expansion section of the first rectifying tube, a plurality of the first-stage guide blades are fixed at one end close to the central axis of the flow channel on the hollow reducer, a plurality of evenly distributed first rectifying holes are opened on the front end side wall of the hollow reducer, and a plurality of evenly distributed second rectifying holes are opened on the rear end side wall; The second-stage rectifying section includes a second rectifying tube and second-stage guide vanes, a thin-walled sleeve and a square grid hole plate installed in the second rectifying tube, wherein the grid hole plate and the second-stage guide vanes are alternately arranged along the axial direction of the pipeline, and a blade group with a different angle from the first-stage guide vanes is staggered, a plurality of thin-walled sleeves with unequal diameters are arranged at equal distances along the radial direction of the pipeline, and the second-stage guide vanes are evenly divided by the thin-walled sleeve and then fixed on the inner wall of the second rectifying tube; A third-stage rectifying section, the third-stage rectifying section comprising a third rectifying tube and a honeycomb rectifying structure fixed in the third rectifying tube; A first rectifying cavity, communicating the first rectifying section and the second rectifying section; The second rectifying cavity is connected with the second rectifying section and the third rectifying section.

2. A multi-stage combined rectifier according to claim 1, characterized in that: The outlet diameter of the first rectifying cavity is equal to the inlet diameters of the first rectifying section and the second rectifying section, both of which are D1; the diameter of the second rectifying cavity is equal to the diameter at the connection between the second rectifying section and the third rectifying section, both of which are D2.

3. A multi-stage combined rectifier according to claim 2, characterized in that: The length of the first rectifying cavity is h1, h1=0.25D1, and the length of the second rectifying cavity is h2, h2=0.25D2.

4. A multi-stage combined rectifier according to claim 2, characterized in that: The first rectifier tube 1 is a variable diameter structure that expands first and then contracts. The maximum diameter of the expanded tube is D1, and the minimum diameter of the contracted tube is D2. The lengths of the expansion section and the contraction section are equal, both of which are 0.5D1. The inlet and outlet diameters of the first rectifier tube are equal, both of which are D2.

5. The multi-stage combined rectifier according to claim 1, characterized in that: There is an inclination angle θ1 between the hollow diameter-changing cylinder and the central axis of the flow channel, 0<θ1<90°.

6. The multi-stage combined rectifier according to claim 1, characterized in that: There is an inclination angle θ2 between the middle of the first-stage guide vane and the central axis of the flow channel, 0<θ2<90°.

7. The multi-stage combined rectifier according to claim 1, characterized in that: The diameter of the first rectifying hole is d1, the diameter of the second rectifying hole is d2, and d2>d1.

8. The multi-stage combined rectifier according to claim 1, characterized in that: The tail of the first-stage guide vane and the second-stage guide vane are both streamlined in design.

9. A fluid pipeline system, characterized in that: A multi-stage combined rectifier comprising any one of claims 1-8.

10. A fluid pipeline system according to claim 9, characterized in that: The multi-stage combined rectifier is located behind the flow disturbing component of the fluid pipeline system.

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