CN-122021190-A - Plug valve sealing specific pressure determining method, device and equipment

CN122021190ACN 122021190 ACN122021190 ACN 122021190ACN-122021190-A

Abstract

The application is applicable to the technical field of plug valves, and particularly relates to a method, a device and equipment for determining the sealing specific pressure of a plug valve; the method comprises the steps of determining basic sealing characteristics of the plug valve according to operation conditions and operation parameters, obtaining fusion sealing characteristics of each component and other components of the plug valve according to the basic sealing characteristics and the position characteristics of the plug valve, determining sealing performance trend of the plug valve based on the fusion sealing characteristics, and determining the optimal sealing specific pressure range according to the sealing performance trend. Therefore, the plug valve sealing specific pressure determining method provided by the application can solve the problem of inaccurate determination of the sealing specific pressure of the plug valve caused by isolation of the sealing performance evaluation of the plug valve.

Inventors

XIE CHAOYI
JIN GUOFU
HU JUNJIE
CHEN SHENGYOU
CHEN MINWU
Teng Junhao
CHEN JIEYI
JIN ZHENGDA

Assignees

科福龙阀门集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (10)

1. The method for determining the sealing specific pressure of the plug valve is characterized by comprising the following steps of: Acquiring operation conditions and operation parameters of the plug valve in a period of time, wherein the operation conditions comprise operation frequency, temperature and pressure of a medium, and the operation parameters comprise the size of a sealing surface and a friction coefficient; Determining basic sealing characteristics of the plug valve according to the operation conditions and the operation parameters, wherein the basic sealing characteristics are used for reflecting the sealing specific pressure of the whole plug valve; Obtaining fusion sealing characteristics of each sealing related part and other sealing related parts of the plug valve according to basic sealing characteristics and position characteristics of the plug valve, wherein the position characteristics comprise spatial position relations among the sealing related parts of the plug valve, the sealing related parts are any one part of a plug body, a valve body and a sealing ring, and the fusion sealing characteristics are used for reflecting sealing performance of the sealing related parts in the plug valve under actual working conditions, and the sealing performance comprises contact pressure and/or friction force; Determining the sealing performance trend of the plug valve based on each fusion sealing characteristic, wherein the sealing performance trend refers to the trend of the overall sealing performance of the plug valve changing with time; And determining the optimal sealing specific pressure range according to the sealing performance trend.
2. The plug valve specific sealing pressure determination method of claim 1, wherein the determining a sealing performance trend of the plug valve based on each of the fused sealing features comprises: Determining a first cooperative characteristic according to each fusion sealing characteristic, wherein the first cooperative characteristic is used for reflecting the degree of the cooperative of the sealing performance among all sealing related components in the plug valve under a dynamic working condition; Determining a second cooperative characteristic according to the first cooperative characteristic and each fusion sealing characteristic, wherein the second cooperative characteristic is used for reflecting the change amplitude of the overall sealing performance of the plug valve; and predicting the sealing performance trend according to the first cooperative characteristic and the second cooperative characteristic.
3. The plug valve seal specific pressure determination method of claim 2, wherein said determining a first cooperative feature from each of said fused seal features comprises: Under the condition that the continuous change of the operation condition along with time is determined, constructing a distance matrix according to time sequence data of the fusion sealing characteristics of any two sealing related components in the plug valve to obtain a first correlation, wherein the first correlation is used for reflecting the degree of correlation of the sealing performance among the sealing related components; taking each sealing related component as a node, taking the first related relation as an edge weight, and constructing a weighted undirected graph; and determining the first cooperative features according to the weighted undirected graph.
4. The plug valve seal specific pressure determination method of claim 2, wherein said determining a second cooperating feature from said first cooperating feature and each of said fused seal features comprises: Obtaining a second correlation between seal related components in the plug valve according to the first cooperative characteristic and the fusion seal characteristic of a plug body in the plug valve, wherein the second correlation is used for reflecting the transmission mode and the transmission path of the seal performance between different seal related components; And constructing a relation diagram among all the sealing related components according to the second relation, and determining the second cooperative characteristic.
5. The plug valve specific sealing pressure determining method according to claim 1, wherein the determining the optimal specific sealing pressure range according to the sealing performance trend comprises: According to the operation parameters and the sealing performance trend, simulating and analyzing the overall sealing performance of the plug valve under different sealing ratios to obtain a simulation analysis result; And determining the optimal sealing specific pressure range with the smallest influence on the overall sealing performance of the plug valve based on the simulation analysis result.
6. The plug valve specific sealing pressure determination method according to claim 5, wherein the determining the optimal specific sealing pressure range that has the smallest influence on the overall sealing performance of the plug valve based on the simulation analysis result includes: Obtaining a change curve of the overall sealing performance of the plug valve under different sealing ratios according to the simulation analysis result; identifying sensitivity of each performance index in the overall sealing performance of the plug valve to the sealing specific pressure of the plug valve according to the change curve; and determining the optimal sealing specific pressure range under each operation condition according to each sensitivity.
7. The plug valve specific sealing pressure determination method of claim 5, wherein the plug valve further comprises a spring, the determining the optimal specific sealing pressure range that has minimal impact on the overall sealing performance of the plug valve based on the simulation analysis result further comprising: determining a sealing specific pressure range according to the simulation analysis result; And analyzing the influence of deformation of each sealing related part under the action of the sealing specific pressure on the sealing gap between the plug valve and the medium, and adjusting the sealing specific pressure range to obtain the optimal sealing specific pressure range.
8. The plug valve sealing specific pressure determination method as defined in claim 1, further comprising: if the optimal sealing specific pressure range is not in the preset range, adjusting the sealing specific pressure of the plug valve; and optimizing the switching speed of the plug valve according to the optimal specific sealing pressure range and the influence coefficient between the specific sealing pressure of the plug valve and the operating condition.
9. A plug valve sealing specific pressure determining device, characterized by comprising: The device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the operation condition and the operation parameter of the plug valve in a period of time, the operation condition comprises the operation frequency, the temperature and the pressure of a medium, and the operation parameter comprises the size and the friction coefficient of a sealing surface; The basic sealing characteristic module is used for determining basic sealing characteristics of the plug valve according to the operation conditions and the operation parameters, wherein the basic sealing characteristics are used for reflecting the sealing specific pressure of the whole plug valve; The device comprises a fusion sealing feature module, a sealing feature detection module and a sealing feature detection module, wherein the fusion sealing feature module is used for obtaining fusion sealing features of each sealing related part of the plug valve and other sealing related parts according to basic sealing features and position features of the plug valve, wherein the position features comprise spatial position relations among the sealing related parts of the plug valve, the sealing related parts are any one part of a plug body, a valve body and a sealing ring, and the fusion sealing features are used for reflecting sealing performance of the sealing related parts in the plug valve under actual working conditions, and the sealing performance comprises contact pressure and/or friction force; The sealing performance trend module is used for determining the sealing performance trend of the plug valve based on each fusion sealing characteristic, wherein the sealing performance trend refers to the trend of the overall sealing performance of the plug valve changing along with time; And the optimal sealing specific pressure range module is used for determining an optimal sealing specific pressure range according to the sealing performance trend.
10. A plug valve sealing specific pressure determination device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any one of claims 1 to 8 when executing the computer program.

Description

Plug valve sealing specific pressure determining method, device and equipment Technical Field The application belongs to the technical field of plug valves, and particularly relates to a method, a device and equipment for determining sealing specific pressure of a plug valve. Background A plug valve is a valve for controlling on-off of fluid by rotating a plug body (generally conical or cylindrical), and the core sealing structure of the plug valve depends on close fit between the plug body and a valve body. The specific sealing pressure is used as a key parameter for evaluating the sealing performance, and refers to the vertical acting force born by a unit sealing surface, and the size of the vertical acting force directly influences the leakage rate and the service life. In the prior art, the sealing performance of a plug valve depends on the contact pressure evaluation of a sealing pair (a valve seat and a valve core) for a long time, the design focus is focused on sealing surface materials (such as hard alloy and polytetrafluoroethylene) and surface treatment processes (such as spraying and nitriding), evaluation indexes are easy to be caused to only aim at the sealing pair, and the synergistic effect of other components (such as a sealing ring, a spring and a valve body structure) is ignored. In addition, in fast-paced engineering practice, enterprises are more prone to adopting simplified processes for rapidly verifying the performance of single components, and faults and fault attribution deviation are easy to cause under actual working conditions. Therefore, the prior art has the problems that the sealing performance evaluation of the plug valve is isolated, and the specific sealing pressure determination of the plug valve is inaccurate. Disclosure of Invention The embodiment of the application provides a method, a device and equipment for determining the sealing specific pressure of a plug valve, which can solve the problem of inaccurate determination of the sealing specific pressure of the plug valve caused by isolation of sealing performance evaluation of the plug valve. In a first aspect, an embodiment of the present application provides a method for determining a specific sealing pressure of a plug valve, including: Acquiring operation conditions and operation parameters of the plug valve in a period of time, wherein the operation conditions comprise operation frequency, temperature and pressure of a medium, and the operation parameters comprise the size of a sealing surface and a friction coefficient; Determining basic sealing characteristics of the plug valve according to the operation conditions and the operation parameters, wherein the basic sealing characteristics are used for reflecting the sealing specific pressure of the whole plug valve; Obtaining fusion sealing characteristics of each sealing related part and other sealing related parts of the plug valve according to basic sealing characteristics and position characteristics of the plug valve, wherein the position characteristics comprise spatial position relations among the sealing related parts of the plug valve, the sealing related parts are any one part of a plug body, a valve body and a sealing ring, and the fusion sealing characteristics are used for reflecting sealing performance of the sealing related parts in the plug valve under actual working conditions, and the sealing performance comprises contact pressure and/or friction force; Determining the sealing performance trend of the plug valve based on each fusion sealing characteristic, wherein the sealing performance trend refers to the trend of the overall sealing performance of the plug valve changing with time; And determining the optimal sealing specific pressure range according to the sealing performance trend. The technical scheme provided by the embodiment of the application at least has the following technical effects: The plug valve sealing specific pressure determining method provided by the embodiment of the application comprises the steps of obtaining the operating conditions and the operating parameters of the plug valve in a period of time, determining basic sealing characteristics of the plug valve according to the operating conditions and the operating parameters, obtaining fusion sealing characteristics of each sealing related part and other sealing related parts of the plug valve according to the basic sealing characteristics and the position characteristics of the plug valve, determining the sealing performance trend of the plug valve based on the fusion sealing characteristics, and determining the optimal sealing specific pressure range according to the sealing performance trend. Therefore, the plug valve sealing specific pressure determining method provided by the embodiment of the application establishes a dynamic sealing specific pressure model by inputting the operation conditions and the operation parameters, adjusts the sealing specific pressure in r