Porous balance flow meter

Abstract

The utility model discloses a porous balance flow meter. Relates to the technical field of flow meters and comprises a connecting pipe, connecting flanges are arranged at the two ends of the connecting pipe respectively, two pipelines are arranged at the top of the connecting pipe, and the two pipelines are arranged in parallel side by side; the perforated plate is arranged in the connecting pipe, a plurality of throttling holes are formed in the perforated plate, a plurality of cylinders are arranged on the side wall of the perforated plate, and the plurality of cylinders are uniformly distributed on the side wall of the perforated plate in an array. The side wall of the perforated plate is microscopically designed, the surface appearance of the side wall of the perforated plate is changed, and the cylindrical array is arranged on the side wall of the perforated plate, so that the structure has a super-hydrophilic function, the formation of cavitation nuclei can be effectively inhibited, and the cavitation effect near the surface is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, and more particularly to a multi-hole balanced flow meter. Background Art

[0002] Balanced flowmeters, due to their precise measurement and reliable operation, are widely used to measure a variety of fluids. They are particularly important in measuring cryogenic fluids, including liquefied natural gas and liquid nitrogen. Balanced flowmeters calculate flow rate based on pressure differences. However, cryogenic fluids have a low vaporization point, and pressure fluctuations can easily cause cavitation, affecting the overall performance of the flowmeter.

[0003] Cavitation occurs when the pressure in a liquid drops below its saturation pressure, and the gas or vapor in the liquid begins to form bubbles or vapor bubbles. Cavitation is a significant phenomenon in fluid dynamics and thermodynamics that can negatively impact fluid flow and flow measurement. During liquid flow, pressure changes occur as the liquid passes through a channel or pipe. If the pressure drops below the liquid's saturation pressure, the gas or vapor in the liquid condenses to form bubbles. These bubbles can obstruct the normal flow of the fluid, reducing the performance of the flowmeter. For example, bubbles can cause uneven fluid flow, increasing measurement errors and leading to decreased flowmeter accuracy and metering precision. Furthermore, bubbles generated by cavitation can increase frictional resistance as the fluid passes through the orifice, resulting in additional pressure loss. Furthermore, the energy generated when the bubbles burst can damage the flowmeter structure.

[0004] Scholars have conducted in-depth research on this phenomenon and found that the main cause of its occurrence during pipeline transportation is the rapid pressure drop during high-speed liquid flow, that is, excessive pressure loss through the porous plate. Feng Zhao et al. proposed a new type of flowmeter with a two-stage perforated plate structure. Compared with a single-stage porous plate, the two-stage perforated plate has a smaller pressure drop and a larger horizontal outflow coefficient. Aneeq Raheem et al. studied the influence of porous plate parameters on cavitation and found that the pressure coefficient decays with the fourth power of the equivalent diameter ratio. Yu Hongshi et al. studied the effect of chamfers on flowmeter performance and found that a front chamfer of 60° and a rear chamfer in the range of 45° to 60° significantly reduced the flowmeter's pressure loss. Zhou Yunlong et al. studied a tapered hole with low throttling loss. Hu Zunhao et al. optimized the structural parameters of a swirl flowmeter. The optimized swirl flowmeter reduced pressure loss by 47.2% compared to the original version. Some people have also conducted research on the structural parameters of the porous plate, such as the number of throttling holes, the thickness of the orifice plate, and the cone angle. By changing these parameters, it is also helpful to reduce the pressure loss of the flow meter.

[0005] Therefore, how to provide a porous balanced flowmeter that can achieve a super-hydrophilic effect, significantly reduce the probability of cavitation nuclei, and effectively suppress the cavitation effect from the source is a problem that technicians in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model provides a porous balanced flowmeter, which can achieve a super-hydrophilic effect, significantly reduce the probability of occurrence of cavitation nuclei, and realize the cavitation effect from the source.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A multi-hole balanced flowmeter, comprising:

[0009] A connecting pipe, wherein both ends of the connecting pipe are provided with connecting flanges, and the top of the connecting pipe is provided with two pipes, and the two pipes are arranged in parallel;

[0010] A porous plate is arranged in the connecting pipe, a plurality of throttling holes are provided on the porous plate, a plurality of cylinders are provided on the side wall of the porous plate, and the plurality of cylinders are evenly distributed in an array on the side wall of the porous plate.

[0011] Furthermore, a circular ring is provided in each of the throttle holes, and a plurality of the circular rings are provided in the throttle holes.

[0012] Furthermore, a plurality of the rings are arranged at intervals in the throttle hole.

[0013] Furthermore, a plurality of cylinders are provided on both side walls of the porous plate, and the plurality of cylinders form a cylinder array structure on the two side walls of the porous plate.

[0014] Furthermore, it also includes a differential pressure transmitter, which is connected to the connecting pipe through the two pipelines.

[0015] It can be seen from the above technical solution that compared with the prior art, the utility model discloses a porous balanced flowmeter, which performs microscopic design on the surface structure of the porous plate, changes the surface morphology of the side wall of the porous plate, and arranges a cylindrical array on the side wall of the porous plate. This structure has a super-hydrophilic function, so that it can achieve a super-wetting effect on the working fluid, effectively inhibit the formation of cavitation nuclei, and reduce the cavitation effect near the surface; at the same time, super-wetting can improve the flow wall conditions, smooth pressure changes, further inhibit the growth and collapse of bubbles, and effectively reduce the impact of the cavitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the multi-porous balanced flowmeter provided by the utility model;

[0018] Figure 2 A side view of the multi-porous balanced flowmeter provided by the utility model;

[0019] Figure 3 This is a structural schematic diagram of the porous plate provided by the utility model.

[0020] Among them: 1 is the connecting pipe; 2 is the connecting flange; 3 is the pipeline; 4 is the porous plate; 5 is the throttling hole; 6 is the cylinder; 7 is the ring; 8 is the differential pressure transmitter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-3 The present invention discloses a multi-hole balanced flowmeter, comprising:

[0023] A connecting pipe 1, with connecting flanges 2 at both ends, and two pipes 3 arranged in parallel on the top of the connecting pipe 1;

[0024] The porous plate 4 is arranged in the connecting pipe 1, and a plurality of throttling holes 5 are provided on the porous plate 4. A plurality of cylinders 6 are provided on the side wall of the porous plate 4, and the plurality of cylinders 6 are evenly distributed in an array on the side wall of the porous plate 4; the cylinder 6 array structure has a super-hydrophilic function, which can effectively inhibit the formation of cavitation nuclei and reduce the cavitation effect near the surface. The super-hydrophilic wall condition can smooth the pressure gradient near the boundary, thereby limiting the growth rate of bubbles and the intensity of collapse.

[0025] In this embodiment, a circular ring 7 is provided in each throttling hole 5, and multiple circular rings 7 are provided in the throttling hole 5; the structure of the circular rings 7 arranged at intervals has a super-hydrophilic function, which can further improve the performance of the porous plate 4 flowmeter on the basis of the original porous plate 4.

[0026] In this embodiment, multiple rings 7 are arranged at intervals in the throttling hole 5; the spaced rings 7 can improve the stability of liquid flow, and can also increase the wettability of the wall surface in the throttling hole 5 of the porous plate 4, so that the liquid is more evenly distributed in the throttling hole 5.

[0027] In this embodiment, multiple cylinders 6 are provided on both sidewalls of the porous plate 4, forming an array of cylinders 6. This array of cylinders 6 exhibits a super-hydrophilic property, adsorbing liquid and forming a thin film that prevents bubbles from forming in the throttle holes 5 of the porous plate 4. This super-hydrophilic property effectively reduces the surface tension of the liquid, minimizing the generation and development of bubbles, thereby inhibiting the occurrence of cavitation.

[0028] In this embodiment, a differential pressure transmitter 8 is further included, and the differential pressure transmitter 8 is connected to the connecting pipe 1 through two pipelines 3 .

[0029] In addition, in this embodiment, an array of fine columns 6 is prepared on the side wall of the porous plate 4 by mask electrolysis.

[0030] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0031] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A porous balanced flowmeter, characterized in that: include: A connecting pipe, wherein both ends of the connecting pipe are provided with connecting flanges, and the top of the connecting pipe is provided with two pipes, and the two pipes are arranged in parallel; A porous plate is arranged in the connecting pipe, a plurality of throttling holes are provided on the porous plate, a plurality of cylinders are provided on the side wall of the porous plate, and the plurality of cylinders are evenly distributed in an array on the side wall of the porous plate.

2. A porous balanced flowmeter according to claim 1, characterized in that: A circular ring is provided in each throttle hole, and a plurality of circular rings are provided in the throttle hole.

3. A porous balanced flowmeter according to claim 2, characterized in that: A plurality of the rings are arranged at intervals in the throttle hole.

4. The porous balanced flowmeter according to claim 1, characterized in that: A plurality of cylinders are provided on both side walls of the porous plate, and the plurality of cylinders form a cylinder array structure on the two side walls of the porous plate.

5. The porous balanced flowmeter according to claim 1, characterized in that: It also includes a differential pressure transmitter, which is connected to the connecting pipe through the two pipelines.

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