Eccentric manifold and fluid measuring device
The integrated eccentric manifold design solves the noise and fluid evacuation problems caused by welding connections, thereby improving fluid flow and increasing production efficiency.
Patent Information
- Application Number
- CN202520038958.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In the existing technology, the welding connection method of eccentric joints and manifolds is difficult to grind completely smooth, which leads to sudden changes in fluid pressure, generating noise, and the fluid is difficult to completely drain.
It adopts an integrated eccentric manifold design, with the inlet and branch outlet smoothly transitioning through the internal flow channel. The guide plate and guide protrusion structure optimize fluid flow and avoid welding connections.
It reduces noise as fluid flows through the manifold, improves flow patterns, simplifies the production process, and increases production efficiency.
Smart Images
Figure CN223664043U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a fluid measurement device, and more particularly, to an eccentric manifold for a fluid measurement device and a fluid measurement device having such a manifold. BACKGROUND
[0002] The contents of this section merely provide background information related to the present disclosure, which does not necessarily constitute the prior art.
[0003] Fluid measurement devices, such as Coriolis flowmeters, are widely used in many fields, for example, oil and gas, water and wastewater, power, chemical, food and life sciences. They are usually used to measure the mass flow, density and other parameters of the fluid in the fluid pipeline. Such fluid measurement devices usually have a plurality of straight or curved vibrating tubes. A vibration source is arranged on the vibrating tube, and the plurality of vibrating tubes are vibrated by the excitation of the vibration source. When the fluid flows through the plurality of vibrating tubes, the required mass flow, density and other parameters are obtained by means of the difference in vibration time of the fluid at the inlet and outlet pipe sections.
[0004] In order to introduce the fluid in the measured pipeline from the inlet of the fluid measurement device to the inlets of the plurality of vibrating tubes, and connect the outlets of the plurality of vibrating tubes with the outlet of the fluid measurement device, the fluid measurement device is provided with a manifold at the inlet and outlet of the vibrating tube, respectively, for distributing the fluid from the measured pipeline to the inlets of the plurality of vibrating tubes, or collecting the fluid from the outlets of the plurality of vibrating tubes and discharging it to the measured pipeline. In addition, since the diameter of the measured pipeline is inconsistent with the diameter of the end of the manifold connected with the vibrating tube (usually, the diameter of the measured pipeline is smaller than the diameter of the end of the manifold connected with the vibrating tube), the fluid measurement device further comprises a joint for realizing the change of diameter from the measured pipeline to the manifold. In order to facilitate the emptying of the fluid, in the related art, the joint is generally in the form of eccentricity, the bottom end of the eccentric joint is a horizontal plane, and the top end is an inclined plane, so as to realize the change of diameter, and at the same time, make the flow path from the outlet of the vibrating tube to the measured pipeline horizontal, facilitating the emptying of the fluid.
[0005] The eccentric joint and the manifold in the prior art are connected by welding, and after the welding is completed, the weld is polished smooth. However, this welding connection mode has the following problems: on the one hand, it is difficult to completely polish the welding area smooth, and on the other hand, due to the lack of smooth transition when the fluid passes through, the pressure of the fluid changes sharply, thereby generating noise, affecting the performance of the fluid measurement device. In addition, due to the existence of the area which is not completely polished smooth on the surface, the fluid in the eccentric joint and the manifold is difficult to completely empty. UTILITY MODEL CONTENTS
[0006] In this section, a general summary of the present disclosure is provided, rather than a comprehensive disclosure of the full scope or all features of the present disclosure.
[0007] In view of the above problems of the existing eccentric joints and manifolds, one object of the present disclosure is to provide an eccentric manifold and a fluid measuring device to improve the flow state of fluid and reduce noise.
[0008] According to a first aspect of the present disclosure, there is provided an eccentric manifold, the manifold comprising an inlet and an outlet, the outlet being provided with at least two sub-outlets, a central axis of the inlet and a central axis of the outlet being parallel to each other and not coinciding, an inner flow passage of the manifold from the inlet to the at least two sub-outlets being smoothly transitioned.
[0009] In some embodiments according to the present disclosure, the at least two sub-outlets comprise a first sub-outlet and a second sub-outlet, a distance between a central axis of the first sub-outlet and the central axis of the inlet being greater than a distance between a central axis of the second sub-outlet and the central axis of the inlet.
[0010] In some embodiments according to the present disclosure, further comprising a flow guide plate extending from the inlet to the outlet, the flow guide plate being convex radially inward from an inner wall of the manifold, and starting at the inlet of the manifold at a center of a first annular inner wall defining the inlet, and ending at the outlet of the manifold at a junction of the first sub-outlet and the second sub-outlet.
[0011] In some embodiments according to the present disclosure, a height of the flow guide plate gradually increases from the inlet to the outlet of the manifold.
[0012] In some embodiments according to the present disclosure, a thickness of the flow guide plate gradually decreases from a bottom end of the flow guide plate to a top end of the flow guide plate.
[0013] In some embodiments according to the present disclosure, the flow guide plate is provided with two, the two flow guide plates being arranged 180° apart inside the manifold.
[0014] In some embodiments according to the present disclosure, the outlet is provided with a second annular inner wall and a third annular inner wall, the second annular inner wall and the third annular inner wall defining the first sub-outlet and the second sub-outlet respectively.
[0015] In some embodiments according to the present disclosure, further comprising a flow guide protrusion, the flow guide protrusion being a crescent-shaped convex portion extending from a surface of the third annular inner wall adjacent to the second annular inner wall radially toward a center of the second sub-outlet.
[0016] In some embodiments according to the present disclosure, a thickness of the flow guide protrusion gradually decreases from an end of the flow guide protrusion connected to the third annular inner wall to an end of the flow guide protrusion extending toward the center of the second sub-outlet.
[0017] According to another aspect of the present disclosure, there is provided a fluid measuring device, comprising a vibrating tube and a manifold according to the above technical solution.
[0018] According to the eccentric manifold and the fluid measuring device of the present disclosure, at least the following beneficial effects can be achieved:
[0019] In the eccentric manifold and the fluid measuring device of the present disclosure, the eccentric joint and the manifold are in an integrated structure, and the inlet to the flow dividing port of the manifold is smoothly transitioned through the inner flow channel, so that the structure of the manifold has less influence on the fluid pressure flowing through the manifold, reduces the noise generated by the fluid flowing through the manifold, and improves the flow state of the fluid. In addition, since the eccentric joint and the manifold are in an integrated structure, no additional welding is required, simplifying the production process and improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0020] The foregoing and other features and characteristics of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate by way of example only. The same reference signs are used in the drawings to indicate the same components. In the drawings:
[0021] Figure 1 A schematic view of a piping system of a fluid measuring device to which an eccentric manifold according to an embodiment of the present disclosure is applied is shown;
[0022] Figure 2 An exploded view of a piping system of a fluid measuring device to which an eccentric manifold according to an embodiment of the present disclosure is applied is shown;
[0023] Figure 3 A schematic view of an eccentric manifold according to an embodiment of the present disclosure is shown;
[0024] Figure 4 A right view of the eccentric manifold of Figure 3 is shown;
[0025] Figure 5 is a cross-sectional view along line A-A in Figure 4 ;
[0026] Figure 6 is a cross-sectional view along line B-B in Figure 3 ;
[0027] Figure 7 is a cross-sectional perspective view of the eccentric manifold in an axial direction;
[0028] Figure 8 is an exploded view of a piping system of a fluid measuring device in the related art (without showing the housing);
[0029] Figure 9This is a cross-sectional perspective view of a fluid measurement device in related technologies after the manifold and eccentric connector are connected. Detailed Implementation
[0030] The present disclosure will now be described in detail with reference to the accompanying drawings through exemplary embodiments. In several drawings, similar reference numerals denote similar parts and components. The following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the present disclosure or its application or use. The embodiments described in this specification are not exhaustive, but merely some of many possible embodiments. Exemplary embodiments may be implemented in many different forms and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known apparatus structures, and well-known techniques may not be described in detail.
[0031] The following will refer to Figures 1 to 7 To describe an eccentric manifold (hereinafter referred to as "manifold") according to an embodiment of the present disclosure.
[0032] Figure 1 A schematic diagram of a piping system incorporating a fluid measuring device with an eccentric manifold according to an embodiment of the present disclosure is shown. Figure 2 An exploded view of a piping system incorporating a fluid measuring device with an eccentric manifold according to an embodiment of the present disclosure is shown.
[0033] Piping system 100 is used in fluid measurement devices, such as Coriolis flow meters. Figure 1 and Figure 2 As shown, the piping system 100 includes a pair of V-shaped vibrating tubes 20, two manifolds 10 connected to the two ends of the pair of vibrating tubes 20, and a housing 30. The vibrating tubes 20 are connected to the fluid pipeline to be measured via the two manifolds 10. The basic structure and working principle of Coriolis flow meters are well known in the art, and therefore will not be described in detail here. Furthermore, the specific form of the vibrating tubes 20 of the flow meter is not limited to the aforementioned V-shaped tubes; straight tubes, other shapes of bends, and other forms can be used.
[0034] Figure 3 A schematic diagram of an eccentric manifold 10 according to an embodiment of the present disclosure is shown; Figure 4 It shows Figure 3 Right view of the eccentric manifold 10; Figure 5 For along Figure 4 A cross-sectional view of line AA in the diagram; Figure 6 For along Figure 3 A sectional view of line BB in the middle; Figure 7 This is a three-dimensional cross-sectional view of the eccentric manifold 10 along the axial direction.
[0035] like Figures 3 to 5 andFigure 7 As shown, the manifold 10 includes an inlet 11 and an outlet 12. The inlet 11 is provided with a connecting connector 111 for connecting to the pipeline under test. The outlet 12 is provided with a second annular inner wall 12a and a third annular inner wall 12b. The second annular inner wall 12a and the third annular inner wall 12b respectively define a first branch port 121 and a second branch port 122. Each of the first branch port 121 and the second branch port 122 is connected to one of a pair of vibrating tubes 20.
[0036] like Figure 4 As shown, when the manifold according to the embodiment of this disclosure is in use, that is, when the fluid measuring device using the eccentric manifold according to the embodiment of this disclosure is installed on the pipeline being measured, the line connecting the center point O1 of the first branch port 121 and the center point O2 of the second branch port 122 is vertical, that is, the first branch port 121 and the second branch port 122 do not overlap in the horizontal direction, and the two vibrating tubes 20 connected to the first branch port 121 and the second branch port 122 are arranged to overlap in the vertical direction (e.g., Figure 1 (As shown).
[0037] like Figure 5 As shown, the inner height h1 of the inlet 11 of the manifold 10 is less than the inner height h2 of the outlet 12, resulting in a certain slope in the inner flow path of the manifold from the inlet 11 to the outlet 12. To avoid this slope affecting the drainage of fluid within the manifold 10, in this embodiment, when in use, the bottom end of the first annular inner wall 11a of the inlet 11 to the bottom end of the third annular inner wall 12b is approximately horizontal (e.g., ...). Figure 5 As shown, the top of the first annular inner wall 11a to the top of the second annular inner wall 12a has an upward slope, so that there is a deviation of a distance d between the central axis xx of the inlet 11 and the central axis yy of the outlet 12.
[0038] Furthermore, such as Figures 5 to 7 As shown, the manifold 10 according to this embodiment of the present disclosure is further provided with a guide plate 13. The guide plate 13 extends from the inlet 11 to the outlet 12 and is integrally formed with the inner wall 14 of the inner flow channel of the manifold 10. The guide plate protrudes radially inward from the inner wall 14. In such a way... Figure 5 In the orientation shown, the guide vane 13 begins at the vertical center of the first annular inner wall 11a at the inlet 11 and terminates at the connection between the first branch port 121 and the second branch port 122 at the outlet 12. Figure 7 As shown, the height of the baffle 13 gradually increases from the inlet 11 to the outlet 12 of the manifold 10. Furthermore, the thickness of the baffle 13 gradually decreases from its bottom end (the end connected to the inner wall 14) to its top end (the end away from the inner wall 14). Figure 6As shown), the fluid entering the manifold 10 from the inlet 11 is gradually guided to the first branch port 121 and the second branch port 122 under the action of the guide plate 13.
[0039] According to a preferred embodiment of the present disclosure, two guide vanes 13 are provided, and the two guide vanes 13 are arranged at a 180° interval inside the manifold 10 (e.g., ...). Figure 6 As shown in the figure, the two guide vanes are arranged facing each other.
[0040] According to the embodiments of the present disclosure, the inlet 11 of the manifold 10 has a smooth transition to the first branch port 121 and the second branch port 122, which makes the structure of the manifold 10 have a smaller impact on the pressure of the fluid flowing through the manifold 10, reduces the noise generated by the fluid flowing through the manifold 10, and has a smaller impact on the performance of the fluid measuring device. In addition, since the inner surface of the manifold 10 is a smooth surface, it is easy to drain the fluid in the manifold 10.
[0041] Furthermore, since there is a deviation of d between the central axis xx of the inlet 11 and the central axis yy of the outlet 12 of the manifold 10, the internal flow path of the manifold 10 from the inlet 11 to the branch port is not symmetrical. Specifically, as shown... Figure 5 As shown, the distance between the central axis aa of the first branch port 121 and the central axis xx of the inlet 11 is d1, and the distance between the central axis bb of the second branch port 122 and the central axis xx of the inlet 11 is d2, where d1 is greater than d2. That is, compared to the first branch port 121, the central axis of the second branch port 122 is closer to the central axis of the inlet 11. This results in an imbalance in the fluid velocity flowing from the inlet 11 to the first branch port 121 and the second branch port 122.
[0042] To balance this imbalance in flow rate, such as Figures 5 to 7 As shown, the manifold 10 in this embodiment also includes a flow guiding protrusion 15. The flow guiding protrusion 15 is disposed on the third annular inner wall 12b near the second annular inner wall 12a, and is used to balance the flow velocity between the first branch port 121 and the second branch port 122. Specifically, as... Figures 5 to 7 As shown, the flow guide protrusion 15 extends radially from the surface of the third annular inner wall 12b adjacent to the second annular inner wall 12a into the second diversion port 122 in a crescent shape. The flow guide protrusion 15 has a smooth surface, and the thickness of the flow guide protrusion 15 gradually decreases from the bottom end of the flow guide protrusion 15 (the end connected to the third annular inner wall 12b) to the top end of the flow guide protrusion 15 (the end facing the center of the second diversion port 122).
[0043] It should be understood that the shape of the flow guiding protrusion 15 according to the embodiments of this disclosure is not limited to the shape shown in the drawings and described herein, but can be changed as needed, as long as the flow guiding function can be achieved.
[0044] It should be noted that the number of vibrating tubes 20 in this embodiment is not limited to the specific number shown in the accompanying drawings or described herein, but can be varied according to the number. When the number of vibrating tubes 20 differs from the number shown in the accompanying drawings or described herein, the number of branch ports of the manifold 10 in this embodiment can be changed accordingly. The inlet 11, the first branch port 121, and the second branch port 122 in this embodiment are also not limited to the shapes shown in the accompanying drawings or described herein, but can be changed as needed, as long as their functions can be achieved.
[0045] In related technologies, in order to compensate for the deviation between the diameter of the pipeline being measured and the diameter of the end of the manifold connected to the vibrating tube, and to allow the fluid in the fluid measuring device to be emptied, a combination of an eccentric joint and a manifold is often used. Figure 8 An exploded view (housing not shown) of the piping system 200 of a fluid measuring device in the related art is shown. Figure 9 A cross-sectional perspective view of a fluid measurement device in the related art, after the manifold and eccentric connector are connected, is shown. (Example) Figure 8 As shown, the piping system 200 includes a pair of V-shaped vibrating tubes 20, two manifolds 210 connected to the two ends of the pair of vibrating tubes 20, and eccentric connectors 240 connected to the two manifolds 210. The eccentric connectors 240 and the manifolds 210 are connected by welding, and the weld is ground smooth after welding. However, this welding connection method makes it difficult to completely smooth the welded area. Furthermore, because there is no smooth transition when the fluid passes through, the fluid pressure changes drastically, generating noise and affecting the performance of the fluid measuring device. In addition, because there are areas on the inner surface of the connection between the eccentric connectors 240 and the manifolds 210 that are not completely smoothed, it is difficult to completely drain the fluid from the fluid measuring device.
[0046] Compared to related technologies where the eccentric connector 240 and manifold 210 are welded together, the manifold according to this disclosure has an eccentric structure. The eccentric connector and manifold are an integral structure, and the inlet of the manifold to the branch outlet smoothly transitions through an internal flow channel, thereby improving the fluid flow pattern. Furthermore, since the eccentric connector and manifold are an integral structure, no additional welding is required, simplifying the manufacturing process and improving production efficiency.
[0047] This disclosure also relates to a fluid measuring device comprising a pair of vibrating tubes 20, a housing 30, and two eccentric manifolds 10 as described above. The inlet of each of the pair of vibrating tubes 20 is connected to a branch port of one eccentric manifold 10, and the outlet of each of the vibrating tubes 20 is connected to a branch port of the other eccentric manifold 10. This allows fluid entering the fluid measuring device through the inlet 11 of the eccentric manifold 10 to pass through one of the eccentric manifolds 10 and enter the pair of vibrating tubes 20. The fluid exiting the pair of vibrating tubes 20 then passes through a branch port of the other eccentric manifold 10 and collects at the outlet 12 of that eccentric manifold 10 before leaving the fluid measuring device.
[0048] Preferred embodiments according to this disclosure have been described above with reference to specific implementation details. It is understood that the above description is exemplary and not restrictive, and various modifications and variations will arise in those skilled in the art from the above description without departing from the scope of this disclosure. These modifications and variations are also included within the scope of protection of this application.
Claims
1. An eccentric manifold, characterized in that, The manifold includes an inlet (11) and an outlet (12), the outlet (12) having at least two branch ports, the central axis of the inlet (11) and the central axis of the outlet (12) being parallel to each other and not overlapping, and the manifold smoothly transitioning from the inlet (11) to the internal flow channels of the at least two branch ports.
2. The manifold according to claim 1, characterized in that, The at least two diversion ports include a first diversion port (121) and a second diversion port (122), wherein the distance between the central axis of the first diversion port (121) and the central axis of the inlet (11) is greater than the distance between the central axis of the second diversion port (122) and the central axis of the inlet (11).
3. The manifold according to claim 2, characterized in that, It also includes a guide plate (13) extending from the inlet (11) to the outlet (12), the guide plate (13) protruding radially inward from the inner wall (14) of the manifold, and starting at the center of the first annular inner wall (11a) defining the inlet (11) in the vertical direction at the inlet (11) of the manifold, and terminating at the connection between the first branch port (121) and the second branch port (122) at the outlet (12) of the manifold.
4. The manifold according to claim 3, characterized in that, The height of the baffle plate (13) gradually increases from the inlet (11) of the manifold to the outlet (12).
5. The manifold according to claim 3, characterized in that, The thickness of the guide plate (13) gradually decreases from the bottom end of the guide plate (13) to the top end of the guide plate (13).
6. The manifold according to any one of claims 3-5, characterized in that, Two guide vanes (13) are provided, and the two guide vanes (13) are arranged at a 180° interval inside the manifold.
7. The manifold according to any one of claims 2-5, characterized in that, The outlet (12) is provided with a second annular inner wall (12a) and a third annular inner wall (12b), the second annular inner wall (12a) and the third annular inner wall (12b) respectively defining the first diversion port (121) and the second diversion port (122).
8. The manifold according to claim 7, characterized in that, It also includes a flow guide protrusion (15), which is a crescent-shaped protrusion extending radially from the surface of the third annular inner wall (12b) adjacent to the second annular inner wall (12a) toward the center of the second diversion port (122).
9. The manifold according to claim 8, characterized in that, The thickness of the guide protrusion (15) gradually decreases from the end of the guide protrusion (15) connected to the third annular inner wall (12b) to the end extending toward the center of the second diversion port (122).
10. A fluid measuring device, characterized in that, The fluid measuring device includes a vibrating tube (20) and a manifold according to any one of claims 1 to 9.