Steam extraction check valve in-place compensator and steam extraction check valve system
By designing the in-place compensator for the extraction steam reverse stop door, the problem of the in-accurate monitoring of the state of the extraction steam reverse stop door under different load conditions is solved, and the accurate monitoring of the valve plate position and the health status management of the equipment are achieved, which improves the reliability and economic benefits of the system.
Patent Information
- Application Number
- CN202510383757.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-06-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to accurately monitor and judge the switching status of the steam extraction counterstop door when the load of the steam extraction counterstop door is different, especially under low load conditions, which leads to the inability to effectively monitor the in-place status of the steam extraction counterstop doors, which may lead to equipment damage or shutdown.
A steam extraction counter-stop door in-place compensator is designed, including a position compensator installation box, stroke switch assembly, linkage mechanism and in-place compensation rack. Through the cooperation of these components, the state of the steam extraction counter-stop door can be monitored normally when the valve plate is not fully opened. Through the design of pressure sensors and elastic parts, the accurate monitoring of the valve plate position and the reduction of mechanical impact are ensured.
It realizes accurate monitoring of the switching status of the extraction steam reverse stop door under different load conditions, avoids equipment damage and shutdown, extends the service life of parts, and improves the health status and economic benefits of the system through a comprehensive monitoring and early warning system.
Smart Images
Figure CN120159541A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of extraction non - return valves, and particularly relates to an in - place compensator for an extraction non - return valve and an extraction non - return valve system. Background Art
[0002] In each extraction steam pipeline of a thermal power plant steam turbine, a non - return valve is arranged. The non - return valve adopts a cantilever non - return valve, which uses the steam inside the pipeline during operation to lift the non - return valve. When the machine stops, there is no steam flow, and the non - return valve naturally falls and closes. During startup and shutdown, whether the opening and closing of each extraction non - return valve are in place is an important monitoring index. During startup, the extraction non - return valve is required to open normally. Otherwise, the heaters for each extraction steam cannot use the extraction steam heat for cooperation. When the machine stops, the extraction non - return valve is required to close in place to prevent the extraction steam from flowing back to the steam turbine during turbine shutdown, causing the turbine to overspeed and damage the equipment.
[0003] With different power generation loads in the thermal power plant, the steam pressure and flow rate of each extraction steam of the steam turbine are also different. This causes different lifting heights of the non - return valves in the extraction steam pipelines. When at full load, the extraction non - return valve is normally lifted open, and the mechanical mechanism moves upward to touch the "open" signal contact, and the computer screen shows that the extraction non - return valve is open. At this time, the state of the extraction non - return valve can be normally monitored. When at low load, the steam pressure in the pipeline is low, and the extraction non - return valve is not fully lifted open. The mechanical mechanism cannot touch the "open" signal contact. At this time, although the operation is normal, the computer screen cannot monitor the state of the extraction non - return valve. It can only judge the position based on the extraction non - return valve leaving the lower "close" signal contact. Although it is reasonable, it is inaccurate. If the "close" signal fails, the state of the non - return valve cannot be judged. If the "open" signal contact is readjusted and positioned, when the unit is at high load and the extraction non - return valve is fully lifted open, it will exceed the range and damage the "open" signal contact. During the operation of the unit with different loads, the position cannot be effectively fixed. Moreover, if there is only one "open" or "close" signal for the extraction non - return valve, the closing time of the extraction non - return valve cannot be calculated, which does not meet the technical requirements. Summary of the Invention
[0004] The invention provides an in - place compensator for an extraction non - return valve and an extraction non - return valve system to solve at least one of the above - mentioned technical problems.
[0005] To solve the above - mentioned technical problems, the invention discloses an in - place compensator for an extraction non - return valve and an extraction non - return valve system. The in - place compensator for an extraction non - return valve includes an in - place compensator installation box, which is bolt - connected to the extraction non - return valve. A travel switch assembly is arranged on the in - place compensator installation box. The valve plate of the extraction non - return valve is meshed with an in - place compensation rack through a linkage mechanism. An in - place compensation main body is arranged on the in - place compensation rack, and a contact part is fixedly connected to the in - place compensation rack. The working end of the contact part is used to cooperate with the travel switch assembly.
[0006] Preferably, the in-place compensator body includes an installation base fixedly connected to the inner wall of the in-place compensator installation box. A threaded adjustment sleeve is fixedly connected to the installation base. A connecting bolt is threadedly connected to the threaded adjustment sleeve. A pressure sensor is provided on the upper surface of the connecting bolt. A guiding sleeve is fixedly connected to the connecting bolt. A compression elastic member is fixedly connected to the upper surface of the connecting bolt. One end of the compression elastic member away from the connecting bolt is fixedly connected to a contact dome, and the contact dome is used to cooperate with the travel switch assembly.
[0007] Preferably, the linkage mechanism includes a linkage mechanism housing fixedly connected to the extraction non-return valve. A linkage gear II is rotatably connected inside the linkage mechanism housing. A linkage gear I is coaxially and fixedly connected to the valve plate. The two sides of the linkage gear II are respectively meshed with the linkage gear I and the in-place compensation rack.
[0008] The extraction non-return valve system includes a control module, a travel switch assembly, and an extraction non-return valve. The control module is electrically connected to the travel switch assembly and the extraction non-return valve. The control module is used to control the operation of the extraction non-return valve, and the travel switch assembly is used to detect the opening and closing state of the valve plate of the extraction non-return valve.
[0009] Preferably, the travel switch assembly includes an upper measurement point travel switch and a lower measurement point travel switch, and both the upper measurement point travel switch and the lower measurement point travel switch are installed on the in-place compensator installation box.
[0010] Preferably, the extraction non-return valve includes a valve body, a valve plate, and an assisting closing device. The valve plate is rotatably connected inside the valve body, and the assisting closing device is installed on the valve body;
[0011] The assisting closing device includes an assisting closing cylinder and an assisting closing rod. The assisting closing cylinder is connected to the control module, and the assisting closing rod is used to assist the valve plate to close.
[0012] Preferably, it further includes an extraction non-return valve health monitoring system, which is used to monitor the health of the extraction non-return valve. The extraction non-return valve health monitoring system includes:
[0013] A leakage degree evaluation unit for calculating the leakage degree evaluation coefficient U of the extraction non-return valve in each monitoring period i ;
[0014] A corrosion degree evaluation unit for calculating the corrosion degree evaluation coefficient V of the extraction non-return valve in each monitoring period i ;
[0015] A blockage degree evaluation unit for calculating the blockage degree evaluation coefficient W of the extraction non-return valve in each monitoring period i ;
[0016] The comprehensive health degree evaluation unit is used to calculate the comprehensive health degree evaluation coefficient of the extraction steam check valve for each monitoring period based on the leakage degree evaluation coefficient, corrosion degree evaluation coefficient, and blockage degree evaluation coefficient of the extraction steam check valve in each monitoring period:
[0017] Among them, X i is the comprehensive health degree evaluation coefficient of the extraction steam check valve in the i-th monitoring period, τ1 is the weight value of the leakage degree evaluation coefficient, τ2 is the weight value of the corrosion degree evaluation coefficient, and τ3 is the weight value of the blockage degree evaluation coefficient;
[0018] The early warning unit is used to compare the comprehensive health degree evaluation coefficient of the extraction steam check valve in the current monitoring period with the predicted comprehensive health degree evaluation coefficient. If the comprehensive health degree evaluation coefficient of the extraction steam check valve in the current monitoring period is less than the predicted comprehensive health degree evaluation coefficient, an early warning prompt will be given.
[0019] Preferably, the leakage degree evaluation coefficient of the extraction steam check valve for each monitoring period:
[0020] Among them, U i is the leakage degree evaluation coefficient of the extraction steam check valve in the i-th monitoring period, β is the detection value error compensation coefficient of the ultrasonic leakage sensor, P i1 is the detection value of the ultrasonic leakage sensor in the i-th monitoring period. The ultrasonic leakage sensor is set on the extraction steam check valve, and P0 is the reference detection value of the ultrasonic leakage sensor when the extraction steam check valve does not leak;
[0021] The corrosion degree evaluation coefficient of the extraction steam check valve for each monitoring period:
[0022] Among them, V i is the corrosion degree evaluation coefficient of the extraction steam check valve in the i-th monitoring period, γ1 is the detection value error compensation coefficient of the hydrogen chloride concentration sensor, γ2 is the detection value error compensation coefficient of the hydrogen fluoride concentration sensor, A i1 is the detection value of the hydrogen chloride concentration sensor in the i-th monitoring period. The hydrogen chloride concentration sensor is set on the extraction steam check valve, and A0 is the reference detection value of the hydrogen chloride concentration when the corrosion degree of the extraction steam check valve is within the normal range. B i1 is the detection value of the hydrogen fluoride concentration sensor in the i-th monitoring period. The hydrogen fluoride concentration sensor is set on the extraction steam check valve, and B0 is the reference detection value of the hydrogen fluoride concentration when the corrosion degree of the extraction steam check valve is within the normal range;
[0023] The blockage degree evaluation coefficient of the extraction steam check valve for each monitoring period:
[0024] Among them, W iα is the blockage degree evaluation coefficient of the extraction non - return valve for the i - th monitoring period. i represents the influence coefficient of the opening degree of the valve plate of the extraction non - return valve on the calculation of the blockage degree evaluation coefficient for the i - th monitoring period. C is the average diameter of the extraction non - return valve. i(in) C is the air pressure detection value at the inlet of the extraction non - return valve for the i - th monitoring period. i(out) Q is the air pressure detection value at the outlet of the extraction non - return valve for the i - th monitoring period. i is the flow detection value at the inlet of the extraction non - return valve for the i - th monitoring period.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] (1) The design of the in - place compensator body of the present invention ensures that the state of the extraction non - return valve can be normally monitored even when the valve plate is not fully open, solving the technical problems in the prior art that when the load is low, the steam pressure in the pipeline is low, the extraction non - return valve is not fully lifted, the mechanical mechanism cannot touch the "open" signal contact point. At this time, although the operation is normal, the computer screen cannot monitor the state of the extraction non - return valve, and it can only judge the position according to the extraction non - return valve leaving the lower "closed" signal contact point, which is reasonable but inaccurate. If the "closed" signal fails, the state of the non - return valve cannot be judged. If the "open" signal contact point is re - adjusted and positioned, when the unit is at high load and the extraction non - return valve is fully lifted, it will exceed the range and damage the "open" signal contact point. During the operation of the unit, different loads cannot effectively fix the position, and if there is only one of the "open" and "closed" signals of the extraction non - return valve, the closing time of the extraction non - return valve cannot be calculated.
[0027] (2) The design of the threaded adjustment sleeve and the connecting bolt of the present invention realizes fine adjustment of the height, adapts to the requirements under different load conditions, the pressure sensor monitors the pressure change between the in - place compensator body and the contact member in real time to ensure accurate monitoring of the valve plate position, and the design of the compression elastic member and the contact dome effectively reduces mechanical shock and extends the service life of the components.
[0028] (3) Through the leakage degree evaluation unit, the corrosion degree evaluation unit and the blockage degree evaluation unit, the present invention realizes comprehensive monitoring of the extraction non - return valve, ensures the healthy state of the system, improves the accuracy of the evaluation based on the detection data of ultrasonic leakage sensors, hydrogen chloride concentration sensors, hydrogen fluoride concentration sensors, etc. The warning unit can issue a warning prompt when the comprehensive health degree evaluation coefficient is lower than the predicted value, prevent potential failures in advance, extend the service life of the extraction non - return valve through real - time monitoring and maintenance suggestions, reduce the downtime and maintenance costs caused by equipment failures, and improve economic benefits. Brief Description of the Drawings
[0029] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings:
[0030] Figure 1 It is a schematic diagram of the overall structure of the steam extraction check valve system of the present invention;
[0031] Figure 2 It is a schematic diagram of the structure of the in-place compensator of the steam extraction check valve of the present invention;
[0032] Figure 3 It is a schematic diagram of the structure of the linkage mechanism of the present invention;
[0033] Figure 4 It is a schematic diagram of the structure of the steam extraction check valve of the present invention.
[0034] In the figure: 1. In-place compensator installation box; 100. In-place compensation rack; 101. Contact member; 2. Steam extraction check valve; 200. Valve plate; 201. Linkage mechanism; 2010. Linkage mechanism housing; 2011. Linkage gear II; 2012. Linkage gear I; 202. Upper measuring point travel switch; 203. Lower measuring point travel switch; 206. Valve body; 207. Auxiliary closing cylinder; 208. Auxiliary closing rod; 3. In-place compensator main body; 302. Installation base; 303. Thread adjusting sleeve; 304. Connecting bolt; 305. Guide sleeve; 306. Compression elastic member; 307. Contact dome. Detailed implementation manners
[0035] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0036] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.
[0037] The present invention provides the following embodiments
[0038] Embodiment 1
[0039] An embodiment of the present invention provides a steam extraction check valve in-place compensator and a steam extraction check valve system, as follows Figures 1-4 As shown, the steam extraction check valve in-place compensator includes an in-place compensator installation box 1, which is bolted to the steam extraction check valve 2. A travel switch assembly is provided on the in-place compensator installation box 1. The valve plate 200 of the steam extraction check valve 2 is meshed with the in-place compensation rack 100 through a linkage mechanism 201. A contact member 101 is fixedly connected to the in-place compensation rack 100. An in-place compensator main body 3 is provided on the contact member 101. The working end of the contact member 101 is used to cooperate with the travel switch assembly.
[0040] The working principle and beneficial effects of the above technical solution are as follows: During operation, the rotation of the valve plate 200 of the steam extraction check valve 2 drives the transmission of the linkage mechanism 201. The linkage mechanism 201 drives the in-place compensation rack 100 to move up and down. The up and down movement of the in-place compensation rack 100 drives the contact member 101 to contact the in-place compensator main body 3, thereby accurately positioning the current spatial position of the valve plate 200.
[0041] The design of the in-place compensator main body 3 of the present invention ensures that the state of the steam extraction check valve can be normally monitored even when the valve plate 200 is not fully open, solving the technical problems in the prior art that when the load is low, the steam pressure in the pipeline is low, the steam extraction check valve is not fully opened, the mechanical mechanism cannot touch the "open" signal contact point, although the operation is normal at this time, the computer screen cannot monitor the state of the steam extraction check valve, and can only judge the position according to the steam extraction check valve leaving the lower "closed" signal contact point, which is reasonable but inaccurate. If the "closed" signal fails, the state of the check valve cannot be judged. If the "open" signal contact point is readjusted and positioned, when the unit is at high load and the steam extraction check valve is fully opened, it will exceed the range and damage the "open" signal contact point. During the operation of the unit, the load is different and the position cannot be effectively fixed. Moreover, if there is only one "open" or "closed" signal for the steam extraction check valve, the closing time of the steam extraction check valve cannot be calculated.
[0042] Embodiment 2
[0043] On the basis of Embodiment 1, the in-place compensator main body 3 includes an installation base 302, which is fixedly connected to the inner wall of the in-place compensator installation box 1. A threaded adjustment sleeve 303 is fixedly connected to the installation base 302. A connecting bolt 304 is threadedly connected to the threaded adjustment sleeve 303. A pressure sensor is provided on the upper surface of the connecting bolt 304. A guiding sleeve 305 is fixedly connected to the connecting bolt 304. A compression elastic member 306 is fixedly connected to the upper surface of the connecting bolt 304. One end of the compression elastic member 306 away from the connecting bolt 304 is fixedly connected to a contact dome 307, and the contact dome 307 is used to cooperate with the travel switch assembly.
[0044] The working principle and beneficial effects of the above technical solution are as follows: During operation, the travel switch assembly contacts the contact dome 307, and the contact dome 307 squeezes the compression elastic member 306, so that the pressure sensor has a pressure value. The degree of opening and closing of the valve plate 200 can be reflected by the magnitude of the pressure value of the pressure sensor, realizing the normal monitoring of the state of the extraction non-return valve when the valve plate 200 is not fully open.
[0045] The design of the threaded adjustment sleeve 303 and the connecting bolt 304 of the present invention realizes fine adjustment of the height to meet the requirements under different load conditions. The pressure sensor monitors the pressure change between the in-place compensator main body 3 and the travel switch assembly in real time to ensure accurate monitoring of the position of the valve plate 200. The design of the compression elastic member 306 and the contact dome 307 effectively reduces mechanical shock and extends the service life of the components.
[0046] Embodiment 3
[0047] On the basis of Embodiment 1, the linkage mechanism 201 includes a linkage mechanism housing 2010. The linkage mechanism housing 2010 is fixedly connected to the extraction non-return valve 2. A second linkage gear 2011 is rotatably connected inside the linkage mechanism housing 2010. A first linkage gear 2012 is coaxially and fixedly connected to the valve plate 200. The two sides of the second linkage gear 2011 are respectively meshed with the first linkage gear 2012 and the in-place compensation rack 100.
[0048] The working principle and beneficial effects of the above technical solution are as follows: The rotation of the valve plate 200 drives the rotation of the first linkage gear 2012. The first linkage gear 2012 drives the rotation of the second linkage gear 2011. The rotation of the second linkage gear 2011 drives the up and down movement of the in-place compensation rack 100, thereby driving the up and down movement of the contact member 101.
[0049] Embodiment 4
[0050] On the basis of any one of Embodiments 1-3, the extraction non-return valve system includes a control module, a travel switch assembly and the extraction non-return valve 2. The control module is electrically connected to the travel switch assembly and the extraction non-return valve 2. The control module is used to control the operation of the extraction non-return valve 2, and the travel switch assembly is used to detect the opening and closing state of the valve plate 200 of the extraction non-return valve 2;
[0051] The travel switch assembly includes an upper measurement point travel switch 202 and a lower measurement point travel switch 203. Both the upper measurement point travel switch 202 and the lower measurement point travel switch 203 are installed on the in-place compensator installation box 1;
[0052] The extraction non-return valve 2 includes a valve body 206, a valve plate 200 and a closing assist device. The valve plate 200 is rotatably connected inside the valve body 206, and the closing assist device is installed on the valve body 206;
[0053] The assisting closing device includes an assisting closing cylinder 207 and an assisting closing rod 208. The assisting closing cylinder 207 is connected to the control module, and the assisting closing rod 208 is used to assist the valve plate 200 to close.
[0054] The working principle and beneficial effects of the above technical solution: When the extraction check valve 2 receives the opening signal sent by the control module, the compressed air electromagnetic three-way valve acts, so that the compressed air in the upper chamber of the piston of the assisting closing cylinder 207 of the extraction check valve 2 is connected to the exhaust port, and the compressed air in the air chamber is discharged. The assisting closing cylinder 207 drives the assisting closing rod 208 to move upward. When there is a steam valve plate 200, the valve plate 200 is pushed open by the steam force. When the extraction check valve receives the closing signal sent by the control module, the compressed air electromagnetic three-way valve opens, and the compressed air is connected to the upper chamber of the piston of the assisting closing cylinder 207 of the extraction check valve 2. Relying on the compressed air to overcome the spring force and steam pressure, the assisting closing rod 208 is moved downward to forcibly close the valve plate 200;
[0055] The assisting closing device of the present invention assists the valve plate 200 to close during shutdown, preventing steam backflow and protecting the safety of the equipment. The state of the extraction check valve is monitored in real time through the travel switch assembly, ensuring the reliable operation of the system. The control module can automatically adjust the position of the extraction check valve according to the load change, improving the intelligent level of the system.
[0056] Embodiment 5
[0057] On the basis of Embodiment 4, it further includes an extraction check valve health monitoring system, which is used to monitor the health of the extraction check valve 2. The extraction check valve health monitoring system includes:
[0058] A leakage degree evaluation unit, which is used to calculate the leakage degree evaluation coefficient U of the extraction check valve 2 in each monitoring period i ;
[0059] A corrosion degree evaluation unit, which is used to calculate the corrosion degree evaluation coefficient V of the extraction check valve 2 in each monitoring period i ;
[0060] A blockage degree evaluation unit, which is used to calculate the blockage degree evaluation coefficient W of the extraction check valve 2 in each monitoring period i ;
[0061] A comprehensive health degree evaluation unit, which is used to calculate the comprehensive health degree evaluation coefficient of the extraction check valve 2 in each monitoring period based on the leakage degree evaluation coefficient, corrosion degree evaluation coefficient and blockage degree evaluation coefficient of the extraction check valve 2 in each monitoring period:
[0062] Wherein, X iis the comprehensive health assessment coefficient of the extraction steam check valve 2 in the i-th monitoring period, τ1 is the weight value of the leakage degree assessment coefficient, τ2 is the weight value of the corrosion degree assessment coefficient, and τ3 is the weight value of the blockage degree assessment coefficient;
[0063] An early warning unit for comparing the comprehensive health assessment coefficient of the extraction steam check valve 2 in the current monitoring period with the predicted comprehensive health assessment coefficient. If the comprehensive health assessment coefficient of the extraction steam check valve 2 in the current monitoring period is less than the predicted comprehensive health assessment coefficient, an early warning prompt is given;
[0064] : The leakage degree assessment coefficient of the extraction steam check valve 2 in each monitoring period:
[0065] Among them, U i is the leakage degree assessment coefficient of the extraction steam check valve 2 in the i-th monitoring period, β is the error compensation coefficient of the ultrasonic leakage sensor detection value, P i1 is the detection value of the ultrasonic leakage sensor in the i-th monitoring period. The ultrasonic leakage sensor is set on the extraction steam check valve 2, and P0 is the reference detection value of the ultrasonic leakage sensor when the extraction steam check valve 2 does not leak;
[0066] The corrosion degree assessment coefficient of the extraction steam check valve 2 in each monitoring period:
[0067] Among them, V i is the corrosion degree assessment coefficient of the extraction steam check valve 2 in the i-th monitoring period, γ1 is the error compensation coefficient of the hydrogen chloride concentration sensor detection value, γ2 is the error compensation coefficient of the hydrogen fluoride concentration sensor detection value, A i1 is the detection value of the hydrogen chloride concentration sensor in the i-th monitoring period. The hydrogen chloride concentration sensor is set on the extraction steam check valve 2, and A0 is the reference detection value of the hydrogen chloride concentration when the corrosion degree of the extraction steam check valve 2 is within the normal range. B i1 is the detection value of the hydrogen fluoride concentration sensor in the i-th monitoring period. The hydrogen fluoride concentration sensor is set on the extraction steam check valve 2, and B0 is the reference detection value of the hydrogen fluoride concentration when the corrosion degree of the extraction steam check valve 2 is within the normal range;
[0068] The blockage degree assessment coefficient of the extraction steam check valve 2 in each monitoring period:
[0069] Among them, W i is the blockage degree assessment coefficient of the extraction steam check valve 2 in the i-th monitoring period, α i represents the influence coefficient of the opening of the valve plate 200 of the extraction steam check valve 2 in the i-th monitoring period on the calculation of the blockage degree assessment coefficient, is the average diameter of the extraction steam check valve 2, C i(in)$C$ is the air pressure detection value at the inlet of the extraction check valve 2 in the $i$-th monitoring period. i(out) $Q$ is the air pressure detection value at the outlet of the extraction check valve 2 in the $i$-th monitoring period. i $F$ is the flow detection value at the inlet of the extraction check valve 2 in the $i$-th monitoring period.
[0070] The working principle and beneficial effects of the above technical solution are as follows: Through the leakage degree evaluation unit, corrosion degree evaluation unit, and blockage degree evaluation unit, the present invention realizes the comprehensive monitoring of the extraction check valve 2, ensures the healthy state of the system, improves the accuracy of evaluation based on detection data such as ultrasonic leakage sensors, hydrogen chloride concentration sensors, and hydrogen fluoride concentration sensors. The early warning unit can issue an early warning prompt when the comprehensive health degree evaluation coefficient is lower than the predicted value, preventing potential failures in advance. Through real-time monitoring and maintenance suggestions, the service life of the extraction check valve 2 is extended, the downtime and maintenance costs caused by equipment failures are reduced, and the economic benefits are improved.
[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.
Claims
1. The extraction check valve in place compensator is characterized by: The invention comprises an in-place compensator installation box (1), the in-place compensator installation box (1) is bolted to a steam extraction check valve (2), a travel switch assembly is provided on the in-place compensator installation box (1), a valve plate (200) of the steam extraction check valve (2) is meshed with an in-place compensation rack (100) through a linkage mechanism (201), a contact piece (101) is fixedly connected to the in-place compensation rack (100), an in-place compensator body (3) is provided on the contact piece (101), and a working end of the contact piece (101) is used to cooperate with the travel switch assembly.
2. The extraction check valve in-place compensator according to claim 1 is characterized in that: The in-place compensator body (3) comprises a mounting base (302), wherein the mounting base (302) is fixedly connected to the inner wall of the in-place compensator mounting box (1), a threaded adjustment sleeve (303) is fixedly connected to the mounting base (302), a connecting bolt (304) is internally threadedly connected to the threaded adjustment sleeve (303), a pressure sensor is provided on the upper surface of the connecting bolt (304), a guide sleeve (305) is fixedly connected to the connecting bolt (304), a compression elastic member (306) is fixedly connected to the upper surface of the connecting bolt (304), and a contact dome (307) is fixedly connected to one end of the compression elastic member (306) away from the connecting bolt (304), and the contact dome (307) is used to cooperate with a travel switch assembly.
3. The extraction check valve in-place compensator according to claim 1 is characterized in that: The linkage mechanism (201) comprises a linkage mechanism housing (2010), wherein the linkage mechanism housing (2010) is fixedly connected to the steam extraction check valve (2), a linkage gear 2 (2011) is rotatably connected inside the linkage mechanism housing (2010), a linkage gear 1 (2012) is coaxially fixedly connected to the valve plate (200), and two sides of the linkage gear 2 (2011) are respectively meshed with the linkage gear 1 (2012) and the in-position compensation rack (100).
4. A steam extraction check valve system, comprising a steam extraction check valve in-place compensator according to any one of claims 1 to 3, characterized in that: The invention comprises a control module, a travel switch assembly and a steam extraction check valve (2), wherein the control module is electrically connected to the travel switch assembly and the steam extraction check valve (2), the control module is used to control the action of the steam extraction check valve (2), and the travel switch assembly is used to detect the open and closed state of a valve plate (200) of the steam extraction check valve (2).
5. The extraction steam check valve system according to claim 4, characterized in that: The travel switch assembly comprises an upper measuring point travel switch (202) and a lower measuring point travel switch (203), and the upper measuring point travel switch (202) and the lower measuring point travel switch (203) are both installed on the in-place compensator installation box (1).
6. The extraction steam check valve system according to claim 4, characterized in that: The steam extraction check valve (2) comprises a valve body (206), a valve plate (200) and a closing-assisting device, wherein the valve plate (200) is rotatably connected in the valve body (206), and the closing-assisting device is installed on the valve body (206); The closing assistance device comprises a closing assistance cylinder (207) and a closing assistance rod (208); the closing assistance cylinder (207) is connected to the control module; and the closing assistance rod (208) is used to assist the valve plate (200) in closing.
7. The extraction steam check valve system according to claim 4, characterized in that: It also includes a steam extraction check valve health monitoring system, which is used to monitor the health of the steam extraction check valve (2). The steam extraction check valve health monitoring system includes: The leakage degree assessment unit is used to calculate the leakage degree assessment coefficient U of the steam extraction check valve (2) in each monitoring cycle. i ; The corrosion degree evaluation unit is used to calculate the corrosion degree evaluation coefficient V of the steam extraction check valve (2) in each monitoring cycle. i ; The blockage degree evaluation unit is used to calculate the blockage degree evaluation coefficient W of the steam extraction check valve (2) in each monitoring cycle. i ; The comprehensive health evaluation unit is used to calculate the comprehensive health evaluation coefficient of the steam extraction check valve (2) in each monitoring period based on the leakage evaluation coefficient, corrosion evaluation coefficient and blockage evaluation coefficient of the steam extraction check valve (2) in each monitoring period: Among them, X i is the comprehensive health evaluation coefficient of the steam extraction check valve (2) in the i-th monitoring period, τ1 is the weight value of the leakage evaluation coefficient, τ2 is the weight value of the corrosion evaluation coefficient, and τ3 is the weight value of the blockage evaluation coefficient; The early warning unit is used to compare the comprehensive health assessment coefficient of the steam extraction check valve (2) in the current monitoring period with the predicted comprehensive health assessment coefficient, and to issue an early warning prompt if the comprehensive health assessment coefficient of the steam extraction check valve (2) in the current monitoring period is less than the predicted comprehensive health assessment coefficient.
8. The extraction steam check valve system according to claim 7, characterized in that: The leakage evaluation coefficient of the extraction steam check valve (2) in each monitoring cycle is: Among them, U i is the leakage evaluation coefficient of the extraction check valve (2) in the i-th monitoring cycle, β is the error compensation coefficient of the ultrasonic leakage sensor detection value, P i1 is the detection value of the ultrasonic leakage sensor in the i-th monitoring cycle, the ultrasonic leakage sensor is arranged on the extraction steam check valve (2), and P0 is the reference detection value of the ultrasonic leakage sensor when the extraction steam check valve (2) is not leaking; Evaluation coefficient of corrosion degree of the extraction steam check valve (2) in each monitoring cycle: Among them, V i is the corrosion degree assessment coefficient of the steam extraction check valve (2) in the i-th monitoring cycle, γ1 is the error compensation coefficient of the detection value of the hydrogen chloride concentration sensor, γ2 is the error compensation coefficient of the detection value of the hydrogen fluoride concentration sensor, A i1 is the detection value of the hydrogen chloride concentration sensor in the i-th monitoring cycle. The hydrogen chloride concentration sensor is arranged on the extraction steam check valve (2). A0 is the reference detection value of the hydrogen chloride concentration when the corrosion degree of the extraction steam check valve (2) is within the normal range. B i1 is the detection value of the hydrogen fluoride concentration sensor in the i-th monitoring cycle, the hydrogen fluoride concentration sensor is arranged on the steam extraction check valve (2), and B0 is the hydrogen fluoride concentration reference detection value when the corrosion degree of the steam extraction check valve (2) is within the normal range; The blockage evaluation coefficient of the steam extraction check valve (2) in each monitoring cycle is: Among them, W i is the blockage evaluation coefficient of the steam extraction check valve (2) in the i-th monitoring cycle, α i represents the influence coefficient of the opening of the valve plate (200) of the steam extraction check valve (2) in the i-th monitoring cycle on the calculation of the blockage degree assessment coefficient, is the average diameter of the extraction check valve (2), C i(in) is the pressure detection value at the inlet of the extraction check valve (2) in the i-th monitoring cycle, C i(out) is the pressure detection value at the outlet of the steam extraction check valve (2) in the i-th monitoring cycle, Q i is the flow detection value at the inlet of the extraction steam check valve (2) in the i-th monitoring cycle.