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Internal thread pipe for improving anti-scaling performance of valve and design optimization method

An internally threaded pipe, anti-scaling technology, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as difficulty in judging cleaning effect, insufficient scaling and cleaning, shortening valve service life, etc. The effect of improving the scaling phenomenon, improving the anti-scaling performance and improving the service life

Active Publication Date: 2020-02-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increase of temperature and the decrease of solubility, sediment will be precipitated, and solid particles will be deposited inside the valve, causing fouling, which will affect the flow of fluid, increase the flow resistance in the valve, increase the energy consumption of transportation, and shorten the service life of the valve.
[0003] It is not easy to judge the cleaning effect by using chemical cleaning solution to remove scale, which may cause waste of cleaning solution or insufficient cleaning of scale
Scale inhibitors are generally used in water and cannot be applied to all fluids, such as mud or oil transportation.

Method used

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  • Internal thread pipe for improving anti-scaling performance of valve and design optimization method
  • Internal thread pipe for improving anti-scaling performance of valve and design optimization method
  • Internal thread pipe for improving anti-scaling performance of valve and design optimization method

Examples

Experimental program
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Effect test

Embodiment

[0060] Use the above method to design the corresponding internal thread pipe for the valve with working pressure PN=1.6MPa, working temperature at 20°C and diameter DN=20mm, particle diameter d p =5×10 -5 m, particle density ρ p =2600kg / m 3 ,Specific steps are as follows:

[0061] (1) The diameter of the valve is DN=20mm, then the outer diameter of the internally threaded pipe is 26.7mm, the wall thickness is 1mm, and the inner diameter D of the pipe is 24.7mm;

[0062] (2) To analyze the stress of solid particles, the gravity, fluid force, and centrifugal force generated by spiral motion are mainly considered. The calculation formulas are shown in the aforementioned formulas (1) to (3).

[0063] (3) Design the entrance strengthening section of the internally threaded pipe, considering the influence of the entrance effect, and at the same time change the shape of the thread so that more solid particles can be deposited on the pipe wall, increasing the pitch can increase the...

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Abstract

The invention discloses an internal thread pipe for improving the anti-scaling performance of a valve and a design optimization method. The internal thread pipe is composed of an inlet strengthening section, an outlet buffering section and a normal flowing section, and the lengths and the shapes of the three sections are different. The length of the inlet strengthening section is 150mm, the pitchratio p1 / D is 2.02, and the groove depth ratio e1 / D is 0.07; the length of the outlet buffer section is 100mm, the pitch ratio p3 / D is equal to 2.43, and the groove depth ratio e3 / D is equal to 0.09;the pitch ratio p2 / D of the normal flow section is equal to 1.82, and the groove depth ratio e2 / D is equal to 0.06. After a solid-liquid mixed phase passes through the internal threaded pipe, most solid particles are thrown to the pipe wall of the internal threaded pipe under the action of centrifugal force, and fluid continuously flows into the valve, so that the dirt resistance of the valve is improved.

Description

technical field [0001] The invention relates to the field of valves, in particular to a device capable of improving the anti-fouling performance of coal chemical valves. Background technique [0002] A valve is a pipeline accessory that has the functions of determining the opening and closing of the pipeline, controlling the flow direction of the fluid, and adjusting the parameters of the circulating medium. It is installed in various pipelines and equipment and other fluid delivery systems. The valve can be used for various fluids such as air, water, steam, mud, oil, liquid metal, etc. It also often uses a solid-liquid two-phase flow medium. Due to the doping of solid particles during use, it will damage the surface of the valve disc and valve seat. Scratches, causing wear and tear. Due to the increase of temperature and the decrease of solubility, sediment will be precipitated, and solid particles will be deposited inside the valve, causing fouling, which will affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/14
Inventor 钱锦远杨晨金志江
Owner ZHEJIANG UNIV
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