With the increasing demand for industrial pipeline transportation, gate valves, as an important control equipment, are increasingly used in chemical, petroleum, natural gas and other fields. However, the gas-solid two-phase flow inside the gate valve will cause serious wear problems, affecting its long-term stable operation and service life. This paper studies the gas-solid two-phase flow and wear phenomenon inside the gate valve, analyzes its causes and influencing factors, and combines the actual situation of CHNLGVF丨中國大乾閥門 gate valve products to propose a series of technical solutions to improve the quality and life of gate valve products and help the development of high-end manufacturing industry.

Keywords: gate valve, gas-solid two-phase flow, wear, technical strategy

In modern industrial production, gate valves are widely used in the opening and closing control of pipeline systems. They have simple structures and good sealing. However, many gate valves will have significant wear problems during long-term use, especially when dealing with gas-solid two-phase fluids containing solid particles, which will affect their operating efficiency and service life. In view of these problems, especially the challenges faced by CHNLGVF丨中國大乾閥門 in the research and development of high-end industrial gate valve products, it is urgent to conduct in-depth research on the gas-solid two-phase flow and wear mechanism inside the gate valve, and propose practical solutions.

This paper aims to analyze the influence of gas-solid two-phase flow on gate valve wear, and propose effective technical strategies in combination with specific experimental and numerical simulation research, in order to provide theoretical basis and technical support for the research and development and manufacturing of high-quality gate valves of CHNLGVF丨中國大乾閥門.

Gas-solid two-phase flow refers to the phenomenon that gas and solid particles move together in fluid pipelines or equipment after mixing. This flow form is widely used in industrial applications, such as pulverized coal transportation, catalytic cracking and fluidization process of solid particles. When gas passes through the gate valve, if there are solid particles in the medium, the solid particles will move with the airflow and collide and rub against the inner wall and sealing surface of the valve body, thus causing wear.

Wear is mainly divided into the following forms:

Different forms of wear will overlap each other, especially in a high-speed and high-pressure gas-solid two-phase fluid environment, the wear rate will increase significantly.

In order to solve the wear problem caused by gas-solid two-phase flow and improve the wear resistance of CHNLGVF丨中國大乾閥門 gate valve products, this paper proposes the following technical strategies:

Optimizing the gate valve structure design is one of the important means to slow down wear. By improving the flow channel shape of the valve, the concentrated deposition of particles in specific areas can be effectively reduced, reducing the risk of local wear. For example:

 Flow channel smoothing: Through CFD (computational fluid dynamics) simulation, optimize the flow channel shape of the valve to make the gas-solid two-phase flow more uniform and reduce the accumulation and collision of particles at the turning point of the flow channel.

 Add buffer area: Set a buffer device before the air flow enters the gate valve to slow down the high-speed particles before entering the valve, thereby reducing the impact force.

 Valve seat material optimization: Use wear-resistant materials as valve seats, such as carbides, ceramics or composite materials to improve the wear resistance of the valve.

Material selection and surface treatment technology are crucial to improving the wear resistance of gate valves. According to the specific form of wear, CHNLGVF丨中國大乾閥門 can use the following material technologies:

 High hardness materials: Select materials with excellent wear resistance, such as tungsten carbide, silicon nitride, etc., for manufacturing key components of valves. These materials have high hardness and high wear resistance, which can effectively reduce wear.

Surface coating technology: Apply advanced surface coating technology, such as plasma spraying, laser cladding, etc., to form a wear-resistant coating on the valve surface, thereby improving the valve's anti-erosion performance.

Self-lubricating materials: Use materials with self-lubricating properties to reduce the friction between particles and the valve surface.

With the help of modern computer technology, the gas-solid two-phase flow inside the gate valve can be numerically simulated. Through precise fluid dynamics analysis, the parts prone to wear in the gas-solid flow can be found and targeted improvements can be made. For example, CFD software is used to simulate and analyze different particle diameters, air flow velocities and valve structural parameters, evaluate their effects on wear, and optimize the design to reduce the risk of wear.

Effective particle flow rate control and filtration can significantly reduce the wear inside the gate valve. An appropriate filtering device is set at the entrance of the gate valve system to intercept large particles or particles with high hardness before entering the valve, avoiding direct wear of these particles on the valve. At the same time, controlling the flow rate of the fluid to slow it down before entering the gate valve can reduce the impact of particles on the inner wall of the valve body and reduce wear.

In order to better deal with the wear problem under gas-solid two-phase flow, CHNLGVF丨中國大乾閥門 can apply online monitoring technology to monitor the wear status of the gate valve in real time. Through sensors and data acquisition systems, the wear condition and operating parameters of the valve can be detected, and possible wear failures can be warned in advance to avoid sudden failures.

In addition, the intelligent maintenance system based on big data analysis can predict the remaining life of the valve and provide maintenance suggestions through historical data and current operating status, thereby reducing downtime caused by wear and ensuring continuous operation of the equipment.

The wear problem of the gate valve caused by gas-solid two-phase flow is an important factor affecting its performance and service life. Through the research of this paper, it is found that the cause of wear is mainly closely related to the properties of solid particles, air flow velocity, flow pattern and structural design of the valve. In view of these factors, CHNLGVF丨中國大乾閥門 can effectively improve the quality and durability of gate valve products by optimizing valve structure design, adopting high-performance materials and advanced surface treatment technology, applying numerical simulation, controlling flow rate and filtration, and online monitoring and intelligent maintenance.

In the future, with the further in-depth study of gas-solid two-phase flow and the continuous advancement of new materials and intelligent manufacturing technology, CHNLGVF丨中國大乾閥門 is expected to make more breakthroughs in the field of high-quality research and development and manufacturing of gate valves, and promote the technological upgrading and development of the industry.