Balanced flowmeter

Abstract

The utility model discloses a balanced type flowmeter, which relates to the field of flowmeter equipment and comprises a rectifying component and a measuring component which are connected with each other, and the rectifying component is positioned on the upstream of the measuring component. The problem that an existing balance type flowmeter is sensitive to upstream interference is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of flow meter equipment, in particular to a balanced flow meter. Background Art

[0002] The balanced flow sensor is a multi-hole disc throttling rectifier installed on the cross section of the pipe. The size and distribution of each hole are customized based on special formulas and test data, called function holes.

[0003] When the fluid passes through the functional hole of the disc, the fluid will be balanced and rectified, the eddy current will be minimized, and an approximately ideal fluid will be formed. A stable differential pressure signal can be obtained through the pressure taking device, and the volume flow rate and mass flow rate can be calculated according to the Bernoulli equation.

[0004] Because the balanced flow sensor has the characteristics of porous structure, it can balance the flow field, reduce eddy current, vibration and signal noise, and greatly improve the stability of the flow field. The meter body adopts special precision pipelines and special pressure taking devices, which makes the accuracy 5-10 times higher than that of traditional throttling devices.

[0005] However, the existing balanced flowmeter is sensitive to upstream disturbances, and the turbulence and eddy currents in the upstream fluid will affect the measurement accuracy of the balanced flowmeter.

[0006] Therefore, how to provide a balanced flow meter that is insensitive to upstream interference has become a difficult problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] The utility model aims to provide a balanced flow meter to solve the problem that the existing balanced flow meter is sensitive to upstream interference.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] The utility model provides a balanced flow meter, which comprises a rectifier component and a measuring component which are connected to each other. The rectifier component is located upstream of the measuring component.

[0010] Preferably, the rectifier assembly comprises a rectifier tube, a first fixing ring is arranged on the inner wall of the rectifier tube, and a self-similar rectifier plate is threadedly connected to the first fixing ring.

[0011] Preferably, a first circular hole is provided at the center of the self-similar rectifier plate, the first circular hole is iteratively surrounded by a plurality of second circular holes, each of the second circular holes is iteratively surrounded by a plurality of third circular holes, the distance between each adjacent two second circular holes is the same, and the distance between each adjacent two third circular holes is the same.

[0012] Preferably, a first clamping groove is provided on the first fixing ring, and the opening of the first clamping groove faces the upstream direction. Threads are provided on the horizontal plane of the first clamping groove.

[0013] A second clamping groove is provided at the edge of the self-similar rectifying plate. Threads matching the threads on the horizontal plane of the first clamping groove are provided on the horizontal plane of the second clamping groove.

[0014] Preferably, the measuring assembly includes a measuring pipe. A second fixing ring is provided on the inner wall of the measuring pipe, and a balancing orifice plate is threadedly connected to the second fixing ring; the measuring pipe and the rectifying pipe are flange-connected; two pressure tapping pipes are provided on the side peripheral wall of the measuring pipe, and the two pressure tapping pipes are respectively located on both sides of the balancing orifice plate, and the top ends of the pressure tapping pipes are connected to a differential pressure transmitter.

[0015] Preferably, a third clamping groove is provided on the second fixing ring, and the opening of the third clamping groove faces the upstream direction. Threads are provided on the horizontal plane of the third clamping groove.

[0016] A fourth clamping groove is provided at the edge of the balancing orifice plate. Threads matching the threads on the horizontal plane of the third clamping groove are provided on the horizontal plane of the fourth clamping groove.

[0017] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0018] A balancing flowmeter provided by the present utility model includes a rectifying assembly and a measuring assembly connected to each other. The rectifying assembly is located upstream of the measuring assembly. After rectifying the upstream fluid through the rectifying assembly, the differential pressure of the rectified fluid is detected, effectively solving the problem that the existing balancing flowmeter is sensitive to upstream interference.

[0019] Both the self-similar rectifying plate and the balancing orifice plate are threadedly connected to the balancing flowmeter. When the self-similar rectifying plate and the balancing orifice plate are damaged, it is convenient to replace them, effectively solving the material waste caused by the integral setting of the existing balancing flowmeter, which can only be replaced as a whole when the balancing orifice plate is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings.

[0021] Figure 1 It is a schematic structural diagram of the balancing flowmeter of the present utility model;

[0022] Figure 2 It is a cross-sectional view of the balancing flowmeter of the present utility model;

[0023] Figure 3 It is a schematic structural diagram of the self-similar rectifying plate of the present utility model;

[0024] Figure 4 This is a schematic diagram of the balanced orifice plate structure of the present utility model.

[0025] Explanation of reference numerals in the drawings: 1. Rectifying assembly; 2. Measuring assembly;

[0026] 11. Rectifying tube; 12. First fixing ring; 13. Self-similar rectifying plate;

[0027] 131. First round hole; 132. Second round hole; 133. Third round hole;

[0028] 21. Measuring tube; 22. Second fixing ring; 23. Balanced orifice plate; 24. Pressure tapping tube; 25. Differential pressure transmitter. Detailed implementation manners

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] As Figures 1-4 shown, a balanced flowmeter includes a rectifying assembly 1 and a measuring assembly 2 which are connected to each other, and the rectifying assembly 1 is located upstream of the measuring assembly 2.

[0031] Specifically, the rectifying assembly 1 includes a rectifying tube 11, a circle of first fixing rings 12 are arranged on the inner wall of the rectifying tube 11, and a self-similar rectifying plate 13 is threadedly connected to the first fixing rings 12.

[0032] Specifically, a first round hole 131 is opened in the center of the self-similar rectifying plate 13, a plurality of second round holes 132 are iteratively arranged around the first round hole 131, and a plurality of third round holes 133 are iteratively arranged around each second round hole 132. The distance between every two adjacent second round holes 132 is the same, and the distance between every two adjacent third round holes 133 is the same.

[0033] The inventor first discovered that after being processed by the self-similar rectifying plate, the turbulence and eddy currents in the fluid are significantly reduced, and the fluid flowing through the self-similar rectifying plate can form a more uniform velocity distribution, which can effectively reduce the influence of upstream interference.

[0034] Among them, the iteration times of the round holes in the self-similar rectifying plate 13 include 1-3 times, and the round holes in the self-similar rectifying plate 13 are generated by the Sierpinski method.

[0035] Specifically, a first card slot is arranged on the first fixing ring 12, and the opening of the first card slot faces the upstream direction, and threads are arranged on the horizontal plane of the first card slot;

[0036] The edge of the self-similar rectifying plate 13 is provided with a second card slot, and the horizontal plane of the second card slot is provided with threads matching the threads on the horizontal plane of the first card slot.

[0037] Among them, when the self-similar rectifying plate 13 is damaged, only the self-similar rectifying plate 13 needs to be replaced, and there is no need to replace the entire balanced flowmeter.

[0038] Specifically, the measuring assembly 2 includes a measuring tube 21. A second fixing ring 22 is arranged on the inner wall of the measuring tube 21, and an orifice plate 23 is threadedly connected to the second fixing ring 22; the measuring tube 21 and the rectifying tube 11 are flange-connected; two pressure-taking tubes 24 are arranged on the side peripheral wall of the measuring tube 21, and the two pressure-taking tubes 24 are respectively located on both sides of the orifice plate 23, and the top of the pressure-taking tube 24 is connected to a differential pressure transmitter 25.

[0039] Specifically, the second fixing ring 22 is provided with a third card slot and the opening of the third card slot faces the upstream direction, and the horizontal plane of the third card slot is provided with threads;

[0040] The edge of the orifice plate 23 is provided with a fourth card slot, and the horizontal plane of the fourth card slot is provided with threads matching the threads on the horizontal plane of the third card slot.

[0041] Among them, when the orifice plate 23 is damaged, only the orifice plate 23 needs to be replaced, and there is no need to replace the entire balanced flowmeter.

[0042] The using process of the utility model is as follows:

[0043] First, threadedly connect the self-similar rectifying plate 13 and the orifice plate 23 into the rectifying tube 11 and the measuring tube 21 respectively, then install the rectifying tube 11 upstream of the measuring tube 21 through a flange to form a balanced flowmeter, and finally, install the assembled balanced flowmeter on the fluid pipeline. After being rectified by the self-similar rectifying plate 13, the fluid can form a more uniform velocity distribution, reduce turbulence and vortices in the flow, and facilitate improving the measurement accuracy of the measuring assembly 2.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A balanced flowmeter, characterized in that: It includes a mutually connected rectifying component (1) and a measuring component (2), and the rectifying component (1) is located upstream of the measuring component (2); the rectifying component (1) includes a rectifying tube (11), and a first fixing ring (12) is arranged on the inner wall of the rectifying tube (11), and a self-similar rectifying plate (13) is threadedly connected to the first fixing ring (12).

2. The balanced flowmeter according to claim 1, wherein: A first circular hole (131) is opened at the center of the self-similar rectifying plate (13), and a plurality of second circular holes (132) are iteratively arranged around the first circular hole (131), and a plurality of third circular holes (133) are iteratively arranged around each of the second circular holes (132). The distance between every two adjacent second circular holes (132) is the same, and the distance between every two adjacent third circular holes (133) is the same.

3. The balanced flowmeter according to claim 2, characterized in that: A first clamping groove is arranged on the first fixing ring (12), and the opening of the first clamping groove faces the upstream direction, and threads are arranged on the horizontal plane of the first clamping groove; A second clamping groove is arranged at the edge of the self-similar rectifying plate (13), and threads matching the threads on the horizontal plane of the first clamping groove are arranged on the horizontal plane of the second clamping groove.

4. The balanced flowmeter according to claim 1, characterized in that: The measuring component (2) includes a measuring tube (21), and a second fixing ring (22) is arranged on the inner wall of the measuring tube (21), and a balance orifice plate (23) is threadedly connected to the second fixing ring (22); the measuring tube (21) and the rectifying tube (11) are flange-connected; two pressure-taking tubes (24) are arranged on the side peripheral wall of the measuring tube (21), and the two pressure-taking tubes (24) are respectively located on both sides of the balance orifice plate (23), and the top of the pressure-taking tube (24) is connected to a differential pressure transmitter (25).

5. The balanced flowmeter according to claim 4, wherein: A third clamping groove is arranged on the second fixing ring (22), and the opening of the third clamping groove faces the upstream direction, and threads are arranged on the horizontal plane of the third clamping groove; A fourth clamping groove is arranged at the edge of the balance orifice plate (23), and threads matching the threads on the horizontal plane of the third clamping groove are arranged on the horizontal plane of the fourth clamping groove.

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