CN-122014902-A - Automatic anti-blocking ball valve with optical fiber sensing and intelligent alcohol injection system for combustible ice exploitation

CN122014902ACN 122014902 ACN122014902 ACN 122014902ACN-122014902-A

Abstract

The automatic anti-blocking ball valve for combustible ice exploitation with the optical fiber sensing and intelligent alcohol injection system comprises a valve body provided with a medium channel and a valve cavity, a ball body and a valve seat, wherein the ball body and the valve seat are arranged in the valve cavity, the optical fiber sensing network is embedded in the inner wall of the valve body, an alcohol injection executing mechanism comprises a plurality of groups of independently controllable alcohol injection nozzles arranged in the valve body, the alcohol injection nozzles are respectively directed to the upstream and the downstream of the valve seat, an intelligent control terminal is respectively and electrically connected with the optical fiber sensing network and the alcohol injection executing mechanism, the intelligent control terminal comprises a data reconstruction module, a state identification module and a strategy executing module, the data reconstruction module is used for demodulating and mapping optical signals fed back by the optical fiber sensing network into a three-dimensional temperature field cloud picture and a local strain distribution picture in real time, and the state identification module is used for outputting state instructions representing the generation position and the growth stage of a hydrate based on the coupling relation between the space-time change characteristics of the three-dimensional temperature field cloud picture and the local strain distribution picture.

Inventors

Wan Jiye
Huang Congce
YU JIANGUO
HU PENGCHENG
YU HAIYAN
YANG JIAYI
Liao Jiandao
YE XUNLIANG

Assignees

浙江伯特利科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260226

Claims (7)

1. The automatic anti-blocking ball valve for the combustible ice exploitation with the optical fiber sensing and intelligent alcohol injection system is characterized by comprising a valve body provided with a medium channel and a valve cavity, a ball body and a valve seat which are arranged in the valve cavity, an optical fiber sensing network which is embedded in the inner wall of the valve body, an alcohol injection executing mechanism which comprises a plurality of groups of independently controllable alcohol injection nozzles which are arranged in the valve body and respectively point to the upstream and the downstream of the valve seat, an intelligent control terminal which is respectively and electrically connected with the optical fiber sensing network and the alcohol injection executing mechanism, wherein the intelligent control terminal comprises a data reconstruction module, a state identification module and a strategy executing module, the data reconstruction module is used for demodulating and mapping optical signals fed back by the optical fiber sensing network into a real-time three-dimensional temperature field cloud image and a local strain distribution image in the valve cavity, the state identification module is used for outputting state instructions representing the generation position and the growth stage of a hydrate based on the coupling relation between the space-time change characteristic of the three-dimensional temperature field image and the local strain distribution image, and the strategy executing module is used for responding to the state instructions, calling corresponding strategy executing module from a preset strategy library and calling corresponding strategy parameters and outputting corresponding strategy-injection waveform-executing parameters to the alcohol injection executing module to the corresponding waveform executing module.
2. The automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system according to claim 1, wherein the state identification module is provided with a double-parameter coupling judgment unit, the double-parameter coupling judgment unit outputs a state instruction of a wall-hanging nucleation period when and only when the temperature drop rate of a monitored area exceeds a preset nucleation threshold value and the corresponding local strain is in nonlinear abrupt change, and otherwise, maintains the monitored state or only outputs fluid low-temperature early warning.
3. The automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system according to claim 1, wherein the strategy execution module adopts a PWM output unit, the PWM output unit dynamically adjusts the duty ratio of voltage pulses output to the alcohol injection execution mechanism according to the severity of a hydrate growth stage contained in the state instruction, and the alcohol injection waveform parameter is configured to output intermittent pulses with low duty ratio in a wall-hanging nucleation period and continuous pressure wave pulses with high duty ratio in a complete blocking period.
4. The automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system according to claim 1, wherein the intelligent control terminal further comprises a closed loop feedback evaluation module, wherein the closed loop feedback evaluation module tracks the temperature rising trend and the strain release degree of a target area in real time during the execution of the alcohol injection action, and when the monitored value meets the preset anti-blocking completion condition, the module sends a blocking signal to the strategy execution module so as to forcibly stop the alcohol injection action.
5. The automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system as set forth in claim 1, wherein the alcohol injection nozzles of the alcohol injection actuating mechanism form a multi-partition alcohol injection array which is spatially divided into an upstream valve seat area and a downstream stagnant area, and the strategy actuating module has a spatial mapping function and is used for activating only the group of alcohol injection nozzles covering the coordinate area for targeted alcohol injection according to the position coordinates in the state command.
6. The automatic anti-blocking ball valve with the optical fiber sensing and intelligent alcohol injection system for combustible ice exploitation, which is disclosed in claim 1, is characterized in that the intelligent control terminal further comprises an action coupling triggering module, wherein the action coupling triggering module is used for monitoring an opening and closing position signal of the sphere, and when the sphere is identified to be in an easy-icing throttle opening range, the module bypasses the state identification module and directly triggers the strategy execution module to generate a defensive alcohol injection instruction covering the whole action process of the sphere.
7. The automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system according to claim 1, wherein the data reconstruction module is further connected with an environment reference database, and the data reconstruction module is used for carrying out differential operation on data acquired in real time and a normal thermal characteristic model in the database so as to remove environmental background noise.

Description

Automatic anti-blocking ball valve with optical fiber sensing and intelligent alcohol injection system for combustible ice exploitation Technical Field The invention relates to an automatic anti-blocking ball valve with an optical fiber sensing and intelligent alcohol injection system for combustible ice exploitation, and belongs to the technical field of valves. Background Combustible ice (natural gas hydrate) is a very potential clean alternative energy source, and the exploitation process of the combustible ice is generally related to a high-pressure low-temperature complex multiphase flow conveying environment. Ball valves are used as key control components in subsea gathering systems and wellhead devices and serve the important functions of regulating flow and cutting off media. However, in deep sea mining operations, the medium is subject to a local temperature drop due to the throttling effect as it flows through the valve, thereby inducing rapid generation and accumulation of hydrates in the dead zone of the valve cavity, the sealing surface of the valve seat, or the spherical passage. The existing anti-blocking technology mainly relies on continuous injection of hot fluid or chemical inhibitor, or passive blocking judgment based on inlet-outlet pressure difference. On the one hand, due to the lack of real-time perceptibility of the thermodynamic state in the valve cavity, accurate intervention is difficult in the initial nucleation stage of hydrate generation, so that excessive waste of the inhibitor is often caused or the actual blocking point cannot be covered by the alcohol injection position, on the other hand, the single pressure monitoring means have serious hysteresis, and when the pressure difference is detected to be abnormal, hard ice blocking is often formed in the valve, so that the valve is extremely easy to be blocked and even the safety accident of pipeline breakage is easily caused. Therefore, there is a need to improve the prior art to solve the technical problems that the existing flammable ice exploitation valve lacks the real-time sensing capability of the internal state and cannot realize accurate and active anti-blocking. Disclosure of Invention The invention aims to overcome the defects and the shortcomings of the prior art and provides an automatic anti-blocking ball valve with an optical fiber sensing and intelligent alcohol injection system for combustible ice exploitation. The invention provides an automatic anti-blocking ball valve for combustible ice exploitation with an optical fiber sensing and intelligent alcohol injection system, which comprises a valve body provided with a medium channel and a valve cavity, a ball body positioned in the valve cavity, an optical fiber sensing network embedded in the inner wall of the valve body, an alcohol injection executing mechanism comprising a plurality of groups of independently controllable alcohol injection nozzles arranged in the valve body, wherein the alcohol injection nozzles are respectively directed to the upstream and the downstream of a valve seat, an intelligent control terminal respectively electrically connected with the optical fiber sensing network and the alcohol injection executing mechanism, the intelligent control terminal comprises a data reconstruction module, a state identification module and a strategy executing module, the data reconstruction module is used for demodulating and mapping optical signals fed back by the optical fiber sensing network into a real-time three-dimensional temperature field cloud picture and a local strain distribution picture in the valve cavity, the state identification module is used for outputting state instructions representing a hydrate generation position and a growth stage based on the coupling relation between the space-time change characteristic of the three-dimensional temperature field cloud picture and the local strain distribution picture, and the strategy executing module is used for responding to the state instructions, calling corresponding strategy parameters from a preset strategy library and outputting corresponding waveform signals to the alcohol injection executing mechanism. The data reconstruction module is further connected with an environment reference database, and is used for carrying out differential operation on the data acquired in real time and a normal thermal characteristic model in the database so as to remove environmental background noise. The state identification module is further provided with a double-parameter coupling judgment unit, and the double-parameter coupling judgment unit outputs a state instruction of a wall-hanging nucleation period when and only when the temperature reduction rate of the monitoring area exceeds a preset nucleation threshold value and the corresponding local strain is in nonlinear mutation, and otherwise, maintains the monitoring state or only outputs fluid low-temperature early warning. The strategy execution