Orifice plate flowmeter with balance rectification function

Abstract

The orifice plate flowmeter with the balance rectification function comprises a pipe body, a hole cover, a supporting frame, a plurality of rectification plates and an orifice plate body, an installation position is arranged in the pipe body, an installation hole capable of exposing the installation position is formed in the outer wall of the pipe body, the hole cover can seal and cover the installation hole, the supporting frame is rotatably arranged in the installation position, and the rectification plates are arranged on the orifice plate body. Each rectifying plate is detachably arranged in the corresponding mounting notch, and the rectifying plates and the mounting notches can be disassembled and assembled through the mounting holes. When the rectifying plates need to be maintained or replaced, all that is needed is to disassemble the hole cover and rotate the supporting frame, so that each rectifying plate can be disassembled and assembled from the mounting holes, and the whole orifice plate flowmeter does not need to be disassembled on a large scale. The convenient disassembly and assembly mode greatly simplifies the maintenance operation process of the equipment, and reduces the time and labor cost required by maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow measurement equipment technical field, concretely relates to a orifice plate flowmeter with balanced rectifying function. BACKGROUND

[0002] When the fluid flows through the elbow, valve and other local resistance components of the pipeline, vortex, uneven flow distribution and other phenomena are easy to occur, which will lead to unstable flow field when the fluid reaches the orifice plate, and further affect the accuracy of differential pressure measurement, so that the measurement accuracy of the orifice plate flowmeter is reduced, and the demand of high-precision flow measurement cannot be met.

[0003] In order to solve the problem of unstable flow field affecting measurement accuracy, some orifice plate flowmeters with rectifying structure appear on the market. The existing rectifying structure mostly has the problem of inconvenient installation and disassembly. When the rectifying structure is damaged or needs to be replaced with different specifications of rectifying components according to different fluid characteristics, the whole orifice plate flowmeter often needs to be disassembled, which is cumbersome to operate, consumes a lot of time and labor cost, and may also cause damage to the pipe body or other components during disassembly, affecting the overall service life of the equipment. UTILITY MODEL CONTENTS

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an orifice plate flowmeter with balanced rectifying function, so as to solve or at least alleviate one or more of the above technical problems or other aspects in the prior art.

[0005] In order to achieve the above purpose, the utility model provides an orifice plate flowmeter with balanced rectifying function, which comprises a pipe body in a straight pipe structure, has opposite upstream pipe port and downstream pipe port, the pipe body is provided with a mounting hole which can expose the mounting site, the mounting site and the mounting hole are close to the upstream pipe port; a hole cover is detachably arranged on the pipe body and can seal the mounting hole; a support frame is rotatably arranged in the mounting site, the rotation axis of the support frame coincides with the axis of the pipe body, the support frame is configured to be unable to move towards the downstream pipe port in the mounting site, a plurality of mounting notches are arranged on the circumference of the support frame; a plurality of rectifying plates are arranged, the rectifying plates are penetrated by a plurality of perforations, each rectifying plate is detachably arranged in the corresponding mounting notch, the rectifying plate is configured to be unable to move along the axial direction of the pipe body on the support frame, the outer wall of the rectifying plate is matched with the inner wall of the pipe body, the rectifying plate and the mounting notch can be disassembled through the mounting hole; and an orifice plate body is arranged in the pipe body and close to the downstream pipe port.

[0006] Preferably, the support frame comprises a connecting disc rotatable around the axis of the pipe body and a plurality of support arms arranged on the circumferential outer wall of the connecting disc and extending in the radial direction of the pipe body, and the mounting gap is formed between two adjacent support arms.

[0007] Preferably, the rectifier plate is provided with a limiting groove on each side, and the support arm is provided with a limiting protrusion matched with the limiting groove.

[0008] Preferably, the rectifier plate has a fan-shaped structure.

[0009] Preferably, the rectifier plate has a first wall surface on each side, and the support arm has a second wall surface on each side, and the first wall surface is flush with the corresponding second wall surface.

[0010] Preferably, the mounting position is an annular groove arranged on the inner wall of the pipe body and extending in the circumferential direction of the pipe body, and the first wall surface and the second wall surface are respectively matched with the groove wall of the annular groove.

[0011] Preferably, the inner wall of the pipe body is provided with a plurality of mounting grooves extending in the axial direction of the pipe body, one end of the mounting groove is communicated with the annular groove, and the other end of the mounting groove penetrates the pipe body and is located on the end surface of the upstream pipe opening side; the number of the mounting grooves corresponds to the number of the support arms, the support arms are slid into the annular groove through the mounting grooves; the mounting groove is provided with a limiting block, one end of the limiting block is flush with the groove wall of the mounting groove, and the other end of the limiting block is flush with the end surface of the pipe body on the upstream pipe opening side.

[0012] Preferably, the cross section of the mounting groove is dovetail-shaped, and the limiting block is matched with the mounting groove.

[0013] The utility model discloses the beneficial effect of the following:

[0014] The utility model discloses a hole plate flowmeter with balanced rectification function, which is provided with a plurality of rectifier plates on the upstream of the hole plate body, can effectively rectify the fluid flowing into the pipe body, eliminate the vortex in the fluid, make the flow rate distribution of the fluid uniform, provide a stable flow field environment for the flow measurement of the hole plate body, thereby improve the precision of flow measurement, meet the demand of high-precision flow measurement in industrial production.

[0015] The rectifying plate is detachably installed in the installation gap of the support frame, the pipe body is provided with an installation hole convenient for operation and a detachable hole cover. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 A structure schematic view of the orifice plate flowmeter provided by the embodiment of the present application with the balanced rectifying function is shown in the figure.

[0018] Figure 2 A structure schematic view of the side of the downstream pipe opening is shown in the figure.

[0019] Figure 3 A structure schematic view of the cooperation between the hole cover and the installation hole is shown in the figure.

[0020] Figure 4 A structure schematic view of the bottom of the hole cover is shown in the figure.

[0021] Figure 5 A structure schematic view of the rectifying plate installed on the support frame is shown in the figure.

[0022] Figure 6 A structure schematic view of the support frame is shown in the figure.

[0023] Figure 7 A structure schematic view of the rectifying plate is shown in the figure.

[0024] Figure 8 A structure schematic view of the cooperation between the limiting block and the installation groove is shown in the figure.

[0025] Figure 9 A structure schematic view of the cooperation between the supporting arm and the installation groove is shown in the figure.

[0026] Figure 10 A cross-sectional schematic view of the orifice plate flowmeter is shown in the figure.

[0027] DRAWINGS

[0028] 10, pipe body; 11, upstream pipe port; 12, downstream pipe port; 13, annular groove; 14, mounting hole; 15, mounting groove; 20, hole cover; 30, support frame; 31, mounting notch; 32, connecting disc; 33, support arm; 331, limiting protrusion; 40, rectifier plate; 41, perforation; 42, limiting groove; 50, hole plate body; 60, sampling tube; 70, sealing gasket; 80, limiting block. DETAILED DESCRIPTION

[0029] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field to which the present application belongs.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1-10 As shown, in one embodiment of this utility model, an orifice plate flowmeter with balancing and rectifying function is provided, including a pipe body 10, an orifice cover 20, a support frame 30, multiple rectifier plates 40, and an orifice plate body 50. The pipe body 10 has a straight pipe structure and has an upstream port 11 and a downstream port 12. Fluid flows into the pipe body 10 from the upstream port 11 and then flows out from the downstream port 12. The pipe body 10 has a mounting position for mounting the support frame 30, and the outer wall of the pipe body 10 has a mounting hole 14 that exposes the mounting position. Both the mounting position and the mounting hole 14 are close to the upstream port 11. The mounting hole 14 provides an operating channel for the subsequent disassembly and maintenance of the rectifier plates 40. The orifice cover 20 is detachably mounted on the pipe body 10, and the orifice cover 20, in conjunction with a sealing gasket 70, seals the mounting hole 14. When the flowmeter is working normally, the orifice cover 20 and the sealing gasket 70 can effectively prevent fluid leakage from the mounting hole 14 inside the pipe body 10, ensuring the sealing performance of the pipe body 10. When maintenance or replacement of the rectifier board 40 is required, simply remove the hole cover 20 and perform the relevant operations through the mounting hole 14, making the operation convenient.

[0036] The support frame 30 is rotatably mounted in the installation position. The rotation axis of the support frame 30 coincides with the axis of the pipe body 10. The support frame 30 is configured to not move towards the downstream pipe opening 12 within the installation position. The support frame 30 has multiple installation notches 31 circumferentially. The number of installation notches 31 can be reasonably set according to the actual rectification requirements and the size of the pipe body 10. In this embodiment, the number of installation notches 31 is six. The rectifier plate 40 has multiple through holes 41. Each rectifier plate 40 is detachably mounted in the corresponding installation notch 31. The rectifier plate 40 is configured to not move along the axial direction of the pipe body 10 on the support frame 30. The outer wall of the rectifier plate 40 is adapted to the inner wall of the pipe body 10. The rectifier plate 40 and the installation notch 31 can be disassembled and assembled through the installation hole 14. The orifice plate body 50 is fixed inside the tube body 10 and close to the downstream tube opening 12. It also includes a differential pressure measuring device (not shown in the attached figure) and two sampling tubes 60, which are respectively connected to the inner cavities of the tube body 10 upstream and downstream of the orifice plate body 50.

[0037] The embodiment discloses a orifice plate flowmeter with balanced rectification function, which is suitable for low pipe pressure working condition, can effectively rectify the fluid flowing into the pipe body 10, eliminate the vortex in the fluid, make the flow velocity distribution of the fluid uniform, provide a stable flow field environment for the flow measurement of the orifice plate body 50, thereby improving the precision of the flow measurement, and meets the demand of high-precision flow measurement in industrial production.

[0038] The rectification plate 40 is detachably installed in the mounting gap 31 of the support frame 30, the pipe body 10 is provided with the mounting hole 14 convenient for operation and the detachable hole cover 20. When it is needed to maintain or replace the rectification plate 40, only the hole cover 20 needs to be detached, and each rectification plate 40 can be disassembled from the mounting hole 14 by rotating the support frame 30, without the need of disassembling the whole orifice plate flowmeter. The convenient disassembly mode greatly simplifies the maintenance operation process of the equipment and reduces the time and labor cost required for maintenance.

[0039] Referring to Figures 5-7 In an embodiment, the support frame 30 comprises a connecting disc 32 and six support arms 33, the connecting disc 32 is rotatable around the axis of the pipe body 10, one end of the support arm 33 is fixedly connected to the circumferential outer wall of the connecting disc 32, the support arm 33 extends along the radial direction of the pipe body 10, the six support arms 33 are arranged in a ring array, and the mounting gap 31 is formed between adjacent two support arms 33. The structural design of the support frame 30 makes the overall structure more stable and less likely to deform, and also facilitates the installation and fixation of the rectification plate 40.

[0040] In an embodiment, the two side walls of the rectification plate 40 are recessed to form a limiting groove 42, and the side wall of the support arm 33 towards the other support arm 33 is provided with a limiting protrusion 331 matched with the limiting groove 42. When the rectification plate 40 is installed in the mounting gap 31, the limiting protrusion 331 is embedded in the limiting groove 42 to form a reliable limiting match, so as to effectively limit the movement of the rectification plate 40 in the radial direction, thereby avoiding the loosening of the rectification plate 40 caused by fluid impact and ensuring that the position of the rectification plate 40 remains fixed during long-term use, so that the rectification function is continuously exerted.

[0041] In an embodiment, the rectification plate 40 is in a fan-shaped structure. The rectification plate 40 in the fan-shaped structure is matched with the shape of the mounting gap 31 formed by the adjacent two support arms 33, can be better installed in the mounting gap 31, ensures the stability of installation, and is also beneficial to uniformly rectifying the fluid in different regions of the pipe body 10.

[0042] In one embodiment, the rectifying plate 40 has two opposite first wall surfaces, and the supporting arm 33 has two opposite second wall surfaces, the first wall surfaces are flush with the corresponding second wall surfaces. This structure design makes the rectifying plate 40 and the supporting arm 33 form a smooth overall structure after the rectifying plate 40 is installed in the installation gap 31, avoids forming a protrusion or a depression at the connection between the rectifying plate 40 and the supporting arm 33, reduces the resistance in the fluid flow process, ensures that the fluid can flow smoothly through the support frame 30 and the rectifying plate 40, and further improves the rectifying effect.

[0043] In one embodiment, the installation position is an annular groove 13 arranged on the inner wall of the pipe body 10, the annular groove 13 extends along the circumference of the pipe body 10, and the first wall surface and the second wall surface are respectively attached to the groove wall of the annular groove 13.

[0044] The annular groove 13 provides a precise positioning reference for the support frame 30 and the rectifying plate 40, ensures that the axis of the support frame 30 coincides with the axis of the pipe body 10, and the rectifying plate 40 is uniformly distributed in the circumferential direction, avoids uneven rectification caused by installation deviation, and further guarantees the stability of the flow field.

[0045] The rectifying plate 40 and the supporting arm 33 wall surface are attached to the groove wall of the annular groove 13, which further improves the cooperation effect of the support frame 30 and the rectifying plate 40 with the pipe body 10, ensures that the support frame 30 and the rectifying plate 40 can only rotate in the annular groove 13, and cannot axially displace, thereby facilitating the rotation of the support frame 30 when the rectifying plate 40 is disassembled.

[0046] Referring to Figure 9 In one embodiment, the inner wall of the pipe body 10 is provided with a plurality of installation grooves 15, the installation grooves 15 extend along the axial direction of the pipe body 10, one end of the installation groove 15 communicates with the annular groove 13, and the other end of the installation groove 15 penetrates the pipe body 10 and is located on the end face of the upstream pipe port 11. The number of installation grooves 15 corresponds to the number of supporting arms 33, and the supporting arm 33 slides into the annular groove 13 through the installation groove 15. A limiting block 80 is arranged in the installation groove 15, one end of the limiting block 80 is flush with the groove wall of the installation groove 15, and the other end of the limiting block 80 is flush with the end face of the pipe body 10 on the side of the upstream pipe port 11.

[0047] When installing the support frame 30, align the six supporting arms 33 with the six installation grooves 15 of the pipe body 10 on the side of the upstream pipe port 11, and then insert each limiting block 80 into the corresponding installation groove 15 after each supporting arm 33 slides into the annular groove 13 along the installation groove 15. The limiting block 80 can limit the sliding of the supporting arm 33 in the installation groove 15, prevent the supporting arm 33 from sliding into the installation groove 15 again, ensure the accurate installation position of the support frame 30 in the pipe body 10, and ensure that the support frame 30 can rotate smoothly in the annular groove 13.

[0048] In one embodiment, the cross section of the mounting groove 15 is dovetail-shaped, and the limiting block 80 is conformally fitted with the mounting groove 15. The narrow opening of the dovetail-shaped mounting groove 15 faces inward, and the wide opening faces outward, so that the support arm 33 is not easy to deviate when sliding in, ensuring that the support arm 33 is accurately aligned with the annular groove 13, avoiding the support arm 33 from being stuck or misaligned due to poor guidance, and further improving the assembly efficiency. The limiting block 80 is conformally fitted with the dovetail-shaped mounting groove 15, so that the limiting block 80 can be tightly installed in the mounting groove 15 and is not easy to loosen, avoiding the displacement of the limiting block 80 under fluid impact, and ensuring that it can play a limiting role for a long time.

[0049] In the description of the utility model, a large number of specific details are explained. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present description.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the description of the utility model.

Claims

1. An orifice plate flowmeter with a balanced rectification function, characterized in that, include: The pipe body (10) has a straight pipe structure and has an upstream pipe opening (11) and a downstream pipe opening (12) with opposite sides. The pipe body (10) has an installation position inside and an installation hole (14) on the outer wall of the pipe body (10) that can expose the installation position. The installation position and the installation hole (14) are both close to the upstream pipe opening (11). The hole cover (20) is detachably provided on the tube body (10) and can seal the mounting hole (14). A support frame (30) is rotatably disposed in the mounting position. The axis of rotation of the support frame (30) coincides with the axis of the pipe body (10). The support frame (30) is configured to not move toward the downstream pipe opening (12) in the mounting position. The support frame (30) has a plurality of mounting notches (31) in the circumferential direction. Multiple rectifier plates (40) are provided, each rectifier plate (40) having multiple through holes (41). Each rectifier plate (40) is detachably mounted in a corresponding mounting notch (31). The rectifier plate (40) is configured to be immobile on the support frame (30) along the axial direction of the tube body (10). The outer wall of the rectifier plate (40) is adapted to the inner wall of the tube body (10). The rectifier plate (40) and the mounting notch (31) can be disassembled and reassembled through the mounting hole (14). The orifice plate body (50) is disposed inside the tube body (10) and near the downstream port (12).

2. The orifice plate flowmeter with balancing and rectifying function according to claim 1, characterized in that, The support frame (30) includes a connecting plate (32) and multiple support arms (33). The connecting plate (32) can rotate around the axis of the tube body (10). The multiple support arms (33) are provided on the circumferential outer wall of the connecting plate (32). The support arms (33) extend radially along the tube body (10), and the mounting notch (31) is formed between two adjacent support arms (33).

3. The orifice plate flowmeter with balancing and rectifying function according to claim 2, characterized in that, The rectifier plate (40) is provided with limiting grooves (42) on both sides, and the support arm (33) is provided with limiting protrusions (331) that cooperate with the limiting grooves (42).

4. The orifice plate flowmeter with balancing and rectifying function according to claim 3, characterized in that, The rectifier plate (40) has a fan-shaped structure.

5. The orifice plate flowmeter with balancing and rectifying function according to claim 2, characterized in that, The rectifier plate (40) has two opposing first walls, and the support arm (33) has two opposing second walls, with the first walls flush with the second wall on the corresponding side.

6. The orifice plate flowmeter with balancing and rectifying function according to claim 5, characterized in that, The mounting position is an annular groove (13) provided on the inner wall of the tube body (10). The annular groove (13) extends circumferentially along the tube body (10), and the first wall surface and the second wall surface respectively fit into the groove wall of the annular groove (13).

7. The orifice plate flowmeter with balancing and rectifying function according to claim 6, characterized in that, The inner wall of the pipe body (10) is provided with multiple mounting grooves (15). The mounting grooves (15) extend along the axial direction of the pipe body (10). One end of the mounting groove (15) is connected to the annular groove (13), and the other end of the mounting groove (15) penetrates the end face of the pipe body (10) located on the side of the upstream pipe opening (11). The number of mounting grooves (15) corresponds to the number of support arms (33). The support arms (33) slide into the annular groove (13) through the mounting grooves (15). The mounting groove (15) is provided with a limiting block (80). One end of the limiting block (80) is flush with the groove wall of the mounting groove (15), and the other end of the limiting block (80) is flush with the end face of the pipe body (10) located on the side of the upstream pipe opening (11).

8. The orifice plate flowmeter with balancing and rectifying function according to claim 7, characterized in that, The cross-section of the mounting groove (15) is dovetail-shaped, and the limiting block (80) fits the mounting groove (15) in a conformal manner.

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