A flow meter conduit

Abstract

The application discloses a novel flowmeter conduit. The flowmeter generally adopts a method of reducing the flow rate of a measured liquid to avoid excessive bubbles in the measurement process, and improves the measurement accuracy of the flowmeter. The utility model discloses a flowmeter conduit body and the relief inner wall thereof are provided with a pattern capable of capturing bubbles adhering to the conduit wall and controlling the running track of the bubbles. The application realizes drag reduction and flow regulation of the measured fluid, effectively improves the smoothness and accuracy of the original signal obtained by the flowmeter, reduces the influence of the bubbles adhering to the conduit wall on the measurement accuracy of the flowmeter, and makes the actual density and the theoretical density approximately the same.

Description

Technical Field

[0001] This utility model relates to a measuring instrument, specifically a flow meter conduit. Background Technology

[0002] A flow meter is an instrument that indicates the flow rate and / or the total amount of fluid in a selected time interval. It typically consists of a housing, conduit, measuring device, and control device.

[0003] In the current field of metrology, piston-type volumetric flowmeters, as a standard device for high-precision calibration, are significantly affected by air bubbles in the fluid during operation. Similarly, flowmeters downstream of the volumetric flowmeter, such as ultrasonic flowmeters, especially high-precision ultrasonic flowmeters, Coriolis flowmeters, micro-flowmeters, orifice plate flowmeters, and electromagnetic flowmeters, all face the problem of air bubbles affecting measurement accuracy in practical applications. The structure of the flowmeter makes it difficult to handle air bubbles in the measured fluid. When air bubbles are generated and mixed into the fluid being measured, the measuring device identifies the bubbles as part of the fluid being measured, thus affecting the actual density. With theoretical density Not equal.

[0004] An electromagnetic flowmeter is a velocity-type instrument based on Faraday's law of electromagnetic induction. It utilizes the electromotive force (EMF) generated when a conductive fluid cuts magnetic lines of force. This EMF is compared with a reference voltage of the liquid being measured, and the induced potential signal is then converted into flow velocity and volumetric flow rate. Traditional methods to address this issue typically involve reducing the flow velocity of the liquid being measured to avoid excessive air bubbles during measurement, thereby improving the flowmeter's accuracy. However, this approach essentially transforms a device problem into an operational problem through condition optimization, failing to address the core issue. Utility Model Content

[0005] This application provides a novel flow meter conduit to solve the problems mentioned in the background art.

[0006] To solve the above technical problems, this application discloses a novel flow meter conduit, including: a flow meter conduit body and a lining inner wall with a texture that can capture air bubbles attached to the conduit wall and control the trajectory of the air bubbles.

[0007] Furthermore, the textured surface is coated with a hydrophobic layer.

[0008] Furthermore, the three-dimensional shape of the texture is a spiral line and spiral lines superimposed with axial lines, oblique lines or transverse lines.

[0009] Furthermore, the spiral is a right-handed spiral with the catheter axis as its central axis.

[0010] Furthermore, the superimposed axial line is strictly parallel to the conduit, and the angle between it and the two planes formed by the two adjacent straight lines is 20°.

[0011] Furthermore, the pitch of the helix is ​​2 mm.

[0012] Furthermore, the width of the texture is 1.2 mm.

[0013] Furthermore, the texture extends throughout the entire flowmeter conduit.

[0014] The beneficial effects of this utility model are that, compared with ordinary flow meter conduits, the flow meter conduit provided in this application has textured surfaces on its body, which captures and controls the movement of air bubbles attached to the conduit wall, thereby achieving drag reduction and rectification of the measured fluid. This effectively improves the stability and accuracy of the original signal obtained by the flow meter, reduces the impact of air bubbles attached to the conduit wall on the flow meter's measurement accuracy, and makes the actual density... With theoretical density They are approximately the same. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a front view of a traditional electromagnetic flowmeter.

[0017] Figure 2 The main view of the electromagnetic flowmeter after the invention has been applied;

[0018] Figure 3 This is a perspective view of the present utility model;

[0019] Figure 4A AA is a schematic diagram of one embodiment of the texture pattern of this utility model;

[0020] Figure 4B A schematic diagram of BB showing one embodiment of the texture pattern of this utility model;

[0021] Figure 5A AA is a schematic diagram of another embodiment of the texture pattern of this utility model;

[0022] Figure 5B This is a schematic diagram of BB, illustrating another embodiment of the texture pattern of this utility model.

[0023] Figures 1-2 middle:

[0024] 1. Electromagnetic flowmeter body; 2. Guide tube; 3. Texture. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] This application provides a flow meter measuring conduit, which includes a flow meter conduit body and hydrophobic textures on its inner lining. The different shapes, sizes, and distribution ranges of the textures on the flow meter conduit lining are designed according to specific engineering conditions to capture as many air bubbles as possible and control their trajectory after capture. After the air bubbles naturally come into contact with the textures, due to their affinity for hydrophobic materials, they form a stable adhesion state on the texture surface. A large number of air bubbles are extracted from the measured fluid and move along the designed textures, with their movement confined to the conduit wall. This optimizes the shape of the measured fluid as it passes through the conduit, making the fluid flow state more stable, reducing the resistance generated when the fluid passes through the conduit, thereby improving fluid flow efficiency. This greatly eliminates the influence of air bubbles on the flow meter measurement, contributing to a smooth and accurate signal and improving the flow meter's measurement accuracy.

[0027] The embodiments and examples of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] Figure 1 This is a front view of a traditional electromagnetic flowmeter. Figure 2 The main view of the electromagnetic flowmeter after using this utility model is shown. Figure 3 This is a perspective view of the present utility model. Figure 1 and Figure 2 As shown, a conduit 2 is connected to the electromagnetic flowmeter body 1. This application improves the conduit 2 by adopting a textured structure. The texture 3 can capture and control air bubbles attached to the conduit wall.

[0029] Based on the average size of small bubbles generated during the operation of common electromagnetic flowmeters, the width d of the texture is designed to be 1.2 mm, the three-dimensional shape is a spiral with a pitch e of 2 mm, the lead runs through the entire guide tube, the spiral is a right-hand spiral with the guide tube axis as the central axis, the superimposed lines are strictly parallel to the guide tube axis, the angle α between the two planes formed by two adjacent straight lines and the axis is 20°, and eighteen straight lines are equally spaced around it.

[0030] When the fluid being measured passes through the conduit, air bubbles naturally come into contact with the hydrophobic patterns on the conduit wall, are captured and controlled within the pattern range, and move stably along the pre-defined patterns. The overall shape of the fluid being measured is optimized, and by the time it reaches the measuring device, the flow state becomes more stable, reducing the impact of air bubbles on the flow meter measurement. The potential signal captured by the electromagnetic flow meter becomes more stable, accurate, and convincing, thus improving the flow meter's measurement accuracy.

[0031] Furthermore, based on the above substitutions, the calculation formula for the volumetric flow rate of the electromagnetic flowmeter is redefined as follows:

[0032]

[0033] in, Theoretical density; This refers to the actual effective cross-sectional area of ​​the catheter; The flow rate of the liquid being measured is kept constant.

[0034] Get The method for determining the actual effective cross-sectional area of ​​the conduit is not detailed in this application. By redefining the equation, the actual values ​​of the three variables for calculating the volumetric flow rate of the flow meter can be accurately obtained, thus achieving quantitative analysis and compensation for measurement errors.

[0035] Figure 4A AA is a schematic diagram of one embodiment of the texture pattern of this utility model. Figure 4B This is a schematic diagram of BB, illustrating one embodiment of the texture pattern of this utility model. In this embodiment, the width d of the texture is designed to be 1.2 mm, the three-dimensional shape is a helix with a pitch e of 2 mm, the lead runs through the entire guide tube, and it is a right-handed helix with the guide tube axis as the central axis of the helix.

[0036] Figure 5A AA is a schematic diagram of another embodiment of the texture pattern of this utility model. Figure 5BThis is a schematic diagram of another embodiment of the texture pattern of this utility model. In this embodiment, the width d of the texture is designed to be 1.2 mm, the three-dimensional shape is a spiral with a pitch e of 2 mm, the lead runs through the entire guide tube, and it is a right-hand spiral with the guide tube axis as the central axis of the spiral. Eighteen straight lines are superimposed, strictly parallel to the guide tube axis, with an angle α of 20° between the plane formed by two adjacent straight lines and the axis. This further increases the area of ​​the texture and improves the probability of the bubble contacting the texture during its natural movement.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A flow meter conduit, characterized in that, include: The flow meter guide tube body and its inner lining have textures that can capture air bubbles attached to the guide tube wall and control the trajectory of the air bubbles.

2. The flow meter conduit according to claim 1, characterized in that: The textured surface is coated with a hydrophobic layer.

3. A flow meter conduit according to claim 2, characterized in that: The texture is a three-dimensional shape consisting of a spiral line and spiral lines superimposed with axial lines, oblique lines, or transverse lines.

4. A flow meter conduit according to claim 3, characterized in that: The spiral is a right-handed spiral with the catheter axis as its central axis.

5. A flow meter conduit according to claim 3, characterized in that: The superimposed axial line is strictly parallel to the conduit, and the angle between it and the two planes formed by the two adjacent straight lines is 20°.

6. A flow meter conduit according to claim 3 or 4, characterized in that: The pitch of the helix is ​​2 mm.

7. A flow meter conduit according to claim 1, characterized in that: The width of the texture is 1.2 mm.

8. A flow meter conduit according to claim 1, characterized in that: The texture runs through the entire flowmeter conduit.

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