Blow-bending-resistant and corrosion-resistant uniform-speed tube flowmeter

Abstract

The utility model discloses an anti-blow-bending and anti-corrosion uniform-speed pipe flowmeter, relates to the technical field of uniform-speed pipe flowmeters, and solves the problems that in the prior art, in a high-temperature, high-pressure, high-flow-speed and strong-corrosivity fluid environment, a pipeline of the flowmeter is subjected to blow-bending deformation, meanwhile, materials of the flowmeter are damaged, and under the combined action of the factors, the flow rate of the flowmeter is influenced. The problems that measurement errors are increased, and even equipment is damaged when the measurement errors are serious are solved. Comprising a uniform-speed pipe flow meter body and a front guiding device which are installed in a measuring pipeline, and the front guiding device is located in front of the uniform-speed pipe flow meter body and guides fluid to stably pass through the uniform-speed pipe flow meter body; the uniform-speed tube flowmeter body comprises a uniform-speed tube at the end, a plurality of pressure tapping holes are formed in one side of the uniform-speed tube, the other side of the uniform-speed tube is a smooth surface, and supporting reinforcing ribs are connected to the smooth surface. The blow-bending prevention device has a good blow-bending prevention effect, and achieves the effects of avoiding blow-bending deformation and corrosion of the uniform-speed tube flowmeter and improving the measurement accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of averaging pitot tube flowmeters, and particularly relates to an averaging pitot tube flowmeter with anti-blowing and anti-corrosion functions. Background Art

[0002] As a differential pressure flowmeter, the averaging pitot tube flowmeter is widely used in the industrial field for measuring the flow rates of various fluids due to its advantages such as simple structure, low cost, and high measurement accuracy. However, in fluid environments with high temperature, high pressure, high flow rate, and strong corrosiveness, the use of traditional averaging pitot tube flowmeters faces severe challenges. These environmental conditions can cause the pipes of the flowmeter to be blown and bent, and at the same time, the corrosion effect will damage the materials of the flowmeter. Under the combined action of these factors, not only the measurement error is increased, but in severe cases, the equipment may even be damaged. In view of this, it is particularly urgent to develop a new type of averaging pitot tube flowmeter with anti-blowing and anti-corrosion functions. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an averaging pitot tube flowmeter with anti-blowing and anti-corrosion functions, which can achieve a good anti-blowing effect, avoid the averaging pitot tube flowmeter from being blown and bent and corroded, and improve the measurement accuracy.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] An averaging pitot tube flowmeter with anti-blowing and anti-corrosion functions includes an averaging pitot tube flowmeter main body installed in a measurement pipeline and a pre-guide device. The pre-guide device is located in front of the averaging pitot tube flowmeter main body to guide the fluid to pass through the averaging pitot tube flowmeter main body smoothly. The averaging pitot tube flowmeter main body includes an averaging pitot tube at the end. A number of pressure tapping holes are opened on one side of the averaging pitot tube, and the other side is a smooth surface, and support and strengthening ribs are connected to the smooth surface.

[0006] By adopting the above technical solutions, the pre-guide device is located in front of the averaging pitot tube flowmeter main body to guide the fluid to pass through the averaging pitot tube flowmeter main body smoothly. The smooth surface of the averaging pitot tube of the averaging pitot tube flowmeter is connected with support and strengthening ribs to enhance its anti-bending ability, prevent the pipes of the flowmeter from being blown and bent, and improve the measurement accuracy.

[0007] Furthermore, the pre-guide device includes a number of guide holes on the inner circumference, and a number of guide vanes are arranged in the guide holes towards the averaging pitot tube flowmeter main body.

[0008] By adopting the above technical solutions, the guide vanes in a number of guide holes guide the fluid to pass through the flowmeter smoothly, reduce the direct impact of the fluid on the averaging pitot tube, and thus reduce the risk of being blown and bent.

[0009] Furthermore, the guide vanes in the guide holes are arranged in an array around their centers, and the guiding fluid flows along the length direction of the measuring pipeline.

[0010] By adopting the above technical solution, the medium with chaotic flow directions in the pipeline is uniformly guided to have the same flow direction, so that it flows along the length direction of the pipeline and passes through the flowmeter, reducing the direct impact of the fluid on the averaging pitot tube and improving the measurement accuracy at the same time.

[0011] Furthermore, the front guiding device includes a mounting flange on the outer periphery, and the mounting flange is connected to the measuring pipeline.

[0012] By adopting the above technical solution, it is convenient to install the whole front guiding device.

[0013] Furthermore, the guide vane is a polytetrafluoroethylene blade.

[0014] By adopting the above technical solution, the surface of polytetrafluoroethylene is smooth, not easy to hang ash, not easy to corrode, and convenient for the flow of the guiding fluid.

[0015] Furthermore, the distance between the averaging pitot tube flowmeter main body and the front guiding device is not less than 10 times the pipe diameter of the measuring pipeline.

[0016] By adopting the above technical solution, the distance between the averaging pitot tube flowmeter main body and the front guiding device is not less than 10 times the pipe diameter of the measuring pipeline, so that the front guiding device will not affect the measurement accuracy of the averaging pitot tube flowmeter.

[0017] Furthermore, the support reinforcing ribs include several transverse and longitudinal connecting ribs, which are wrapped on one side of the smooth surface of the averaging pitot tube.

[0018] By adopting the above technical solution, the anti-bending ability is enhanced on the smooth surface of the flowmeter without pressure tapping holes.

[0019] Furthermore, an anti-corrosion coating is provided on the surface of the averaging pitot tube flowmeter main body.

[0020] By adopting the above technical solution, it can work stably for a long time in corrosive media such as strong acids and strong alkalis, and improve its anti-corrosion ability.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. Improve stability: Through the strengthened support structure and fluid guiding design, the anti-bending ability of the averaging pitot tube flowmeter in harsh environments is improved, and the service life of the equipment is extended.

[0023] 2. Enhance the anti-corrosion performance: Select corrosion-resistant materials and conduct surface protection treatment to effectively prevent the corrosion of the medium fluid on the averaging pitot tube flowmeter.

[0024] 3. Improve measurement accuracy: The pre-fluid pre-guiding device can direct the medium with chaotic flow directions in the pipeline to have a consistent flow direction. At this time, the measured flow data will be more accurate. Brief Description of the Drawings

[0025] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is the overall structural schematic diagram of a pitot tube flowmeter that prevents bending and corrosion according to the present invention;

[0027] Figure 2 is the structural schematic diagram of the support and strengthening rib part in a pitot tube flowmeter that prevents bending and corrosion according to the present invention.

[0028] In the figure, 1, support and strengthening rib; 2, differential pressure transmitter body; 3, pressure tapping hole; 4, pre-guiding device; 5, flow direction before guiding; 6, flow direction after guiding; 7, measurement pipeline. Detailed Embodiments

[0029] The following further describes the detailed embodiments of the present invention with reference to the drawings. This embodiment does not limit the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0030] A pitot tube flowmeter that prevents bending and corrosion, as Figure 1 shown, includes a pitot tube flowmeter main body and a pre-guiding device 4 installed in the measurement pipeline 7. The pre-guiding device 4 (fluid guiding design) is located in front of the pitot tube flowmeter main body to guide the fluid to pass through the pitot tube flowmeter main body smoothly;

[0031] Determine the position of the pre-guiding device 4 and the pitot tube flowmeter according to the actual situation on site. Among them, the distance between the pitot tube flowmeter main body and the pre-guiding device 4 is not less than 10 pipeline diameters of the measurement pipeline 7, so as not to affect the measurement accuracy of the pitot tube flowmeter main body due to the structure of the pre-guiding device 4.

[0032] As Figure 1As shown in the figure, the front guiding device 4 includes a mounting flange on the outer periphery, a mounting plate fixed inside the mounting flange, and a plurality of guiding holes opened on the mounting plate. The mounting flange is connected to the measuring pipeline 7, and a plurality of guiding vanes are connected in the guiding holes towards the direction of the averaging pitot tube flowmeter main body; the guiding vanes in the guiding holes are arranged in an array around their centers, and the guiding fluid flows along the length direction of the measuring pipeline 7.

[0033] In this embodiment, the guiding vanes are specifically selected as polytetrafluoroethylene vanes, which have a smooth surface, are not prone to ash hanging, and are not easily corroded. The shape of a single one is one-eighth of the guiding hole, and there are eight guiding vanes evenly distributed in a single guiding hole. When there is no fluid passing through, they are combined with other guiding vanes towards the center position of the guiding hole to form a complete circle. When fluid passes through, the fluid pushes the guiding vanes therein backward, making them face the direction of the averaging pitot tube flowmeter main body, and guiding the fluid to pass smoothly backward through the averaging pitot tube flowmeter main body.

[0034] The guiding vanes therein can be rigid or flexible sheet-like structures. In this embodiment, movable streamlined guiding vanes are adopted to guide the fluid to pass through the flowmeter smoothly, reduce the direct impact of the fluid on the averaging pitot tube, and thus reduce the risk of being blown and bent.

[0035] As Figure 1 and Figure 2 shown, the averaging pitot tube flowmeter main body includes a differential pressure transmitter main body at the upper end and an averaging pitot tube at the lower end. A plurality of pressure tapping holes 3 are opened on one side of the averaging pitot tube, and the other side is a smooth surface. In order to prevent the pipeline of the flowmeter from being blown and bent and deformed, a support reinforcing rib 1 (reinforced support structure) is connected to the smooth surface; among them, the support reinforcing rib 1 includes a plurality of transverse and longitudinal connecting ribs, which are wrapped on one smooth surface side of the averaging pitot tube.

[0036] Among them, the support reinforcing rib 1 can be semi-circular and is directly fixed on the smooth back of the averaging pitot tube flowmeter main body without the pressure tapping holes 3; in this embodiment, a reinforced support structure is added outside the averaging pitot tube flowmeter main body, and the support reinforcing rib 1 is used on the smooth surface of the flowmeter without the pressure tapping holes 3 to enhance its bending resistance. The material of the support reinforcing rib 1 is made of high-strength alloy steel to ensure its stability under high-temperature and high-pressure conditions.

[0037] As Figure 1 shown, since this application works in a fluid environment with high temperature, high pressure, high flow rate, and strong corrosiveness, an anti-corrosion design is also made, including,

[0038] According to the actual medium situation on site, materials with excellent corrosion resistance are selected as the main materials of the averaging pitot tube flowmeter, such as titanium alloy, Hastelloy, etc. These materials have good anti-corrosion performance and can work stably for a long time in corrosive media such as strong acids and strong alkalis.

[0039] Spray an anti-corrosion coating on the surface of the averaging pitot tube flowmeter so that there is one or more anti-corrosion coatings on the surface of the main body of the averaging pitot tube flowmeter. The corresponding anti-corrosion coating needs to be selected according to the actual medium conditions on site to further improve its anti-corrosion ability.

[0040] Working principle:

[0041] Determine the position of the pre-guide device 4 and the averaging pitot tube flowmeter according to the actual situation on site, so that the distance between the two is more than 10 pipe diameters to avoid affecting the measurement accuracy; after the position is determined, install the pre-guide device 4 through the installation flange and test the flow of the fluid guide vane. When testing, the wind direction flow should be stable and consistent;

[0042] The flowmeter uses a smooth back with no pressure tapping holes 3 and adds a support reinforcing rib 1 to ensure its stability under high temperature and high pressure conditions and is not easily blown bent. Finally, spray with an anti-corrosion coating corresponding to the actual medium on site;

[0043] This flowmeter does not affect the installation, disassembly and maintenance work of the flowmeter at all, and will improve the measurement accuracy, ensure the structural stability of the flowmeter in high temperature, high pressure and high flow rate pipelines, and will not be blown bent.

[0044] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention. Such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. A constant velocity tube flowmeter that resists bending and corrosion, characterized in that: It includes an averaging pitot tube flowmeter body installed in a measuring pipeline and a pre - guiding device. The pre - guiding device is located in front of the averaging pitot tube flowmeter body to guide the fluid to pass smoothly through the averaging pitot tube flowmeter body. The averaging pitot tube flowmeter body includes an averaging pitot tube at the end. A number of pressure - tapping holes are provided on one side of the averaging pitot tube, and the other side is a smooth surface, and support and strengthening ribs are connected to the smooth surface.

2. The averaging pitot tube flowmeter for preventing bending by blowing and corrosion according to claim 1, wherein: The pre - guiding device includes a number of guiding holes on the inner circumference, and a number of guiding vanes are provided in the guiding holes in the direction of the averaging pitot tube flowmeter body.

3. The averaging pitot tube flowmeter according to claim 2, characterized in that: The guiding vanes in the guiding holes are arranged in an array around their centers, and the guiding fluid flows along the length direction of the measuring pipeline.

4. The averaging pitot tube flowmeter for preventing bending by blowing and corrosion prevention according to claim 1 or 2, characterized in that: The pre - guiding device includes a mounting flange on the outer circumference, and the mounting flange is connected in the measuring pipeline.

5. The averaging pitot tube flowmeter for preventing bending by blowing and corrosion prevention according to claim 2, wherein: The guiding vane is a polytetrafluoroethylene vane.

6. The averaging pitot tube flowmeter for preventing blowing bending and corrosion according to claim 1, wherein: The distance between the averaging pitot tube flowmeter body and the pre - guiding device is not less than 10 times the pipeline diameter of the measuring pipeline.

7. The averaging pitot tube flowmeter for preventing blowing bending and corrosion according to claim 1, characterized in that: The support and strengthening ribs include a number of transverse and longitudinal connecting ribs, which are wrapped on the smooth - surface side of the averaging pitot tube.

8. The averaging pitot tube flowmeter for preventing bending by blowing and corrosion according to claim 1, characterized in that: The surface of the averaging pitot tube flowmeter body is provided with an anti - corrosion coating.

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