Valve with super-erosion-resistant function for nuclear power plant

Abstract

The invention discloses a valve with an ultra-erosion-resistant function for a nuclear power plant, and relates to the technical field of valves. Through cooperation of the driving motor, the threaded rod, the threaded cylinder and the valve plate, lifting of the valve plate is accurately controlled conveniently, and the function of accurately adjusting the flow of the valve is achieved; the sealing performance of the valve element and the valve port is monitored through the analysis module, sealing hidden dangers can be found in time, medium leakage caused by the sealing problem is avoided, the sealing reliability of the valve is effectively improved, and the defect that the sealing problem is prone to occurring due to rigid abutting connection of the valve element and the valve port of a traditional valve is overcome. By comprehensively considering the pressure of the valve core and the valve port, the number of impurity particles, the particle size, the hardness, the medium flow rate, the impact angle and other factors, the calculation of the abrasion loss is more accurate, and the abrasion condition of the nuclear power plant valve in actual operation can be more accurately reflected.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a valve with super erosion resistance for nuclear power plants. Background Art

[0002] Valves in nuclear power plants are in an extreme environment of long-term high temperature, high pressure and full of strongly corrosive media, which puts extremely high requirements on the erosion resistance, sealing performance and reliability of the valves.

[0003] In the existing valves, the valve core and the valve port adopt a rigid direct abutment method. During frequent opening and closing processes, severe friction occurs between the valve core and the valve port. The particulate impurities in the media of nuclear power plants further exacerbate this mechanical wear, resulting in scratches, pits and other damages on the surfaces of the valve core and the valve port. Over time, these wears will gradually expand, destroying the sealing performance of the valve and even causing medium leakage. Therefore, it is necessary to improve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and propose a valve with super erosion resistance for nuclear power plants.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A valve with super erosion resistance for nuclear power plants includes a valve body. A partition is provided inside the valve body to divide the inside of the valve body into an upper chamber and a lower chamber. A flange interface is provided at the top of the upper chamber. A cover plate is provided on the flange interface. A plurality of fixing bolts are passed through the periphery of the cover plate and the flange interface. A frame is provided in the middle of the top surface of the cover plate, and a driving motor is installed on the top surface of the frame. A driving motor is installed on the top of the cover plate. An acquisition module, an analysis module and an adjustment module are provided inside the controller of the driving motor. The acquisition module acquires the pressure data, impurity content data and the radius data of the valve core and the valve port detected by the pressure sensor, laser particle size analyzer and rangefinder. The analysis module retrieves and analyzes the data acquired by the acquisition module, determines whether the valve core and the valve port are skewed and calculates the wear amount of the valve core and the valve port. If skewed, a valve core warning signal is generated and transmitted to the adjustment module. Then, the wear amount is adjusted according to the impurity content in the medium, and the time to reach the wear threshold is determined. After reaching the calculated time, a replacement part signal is generated and transmitted to the adjustment module. The adjustment module receives the signals transmitted by the analysis module and performs corresponding operations.

[0006] Preferably, the output shaft of the drive motor penetrates through the inner bottom surface of the cover plate and is coaxially fixedly connected with a threaded rod. A shaft seal is sleeved on the output shaft of the drive motor at the position of the frame. A threaded cylinder is screwed on the lower end part of the threaded rod. A valve plate is fixedly connected to the bottom end of the threaded cylinder. An airbag is arranged on the bottom surface of the valve plate.

[0007] Preferably, a valve port is opened in the middle of the top surface of the partition plate. A plugging ring is arranged at the valve port. A plurality of arc-shaped grooves are equidistantly opened on the inner wall of the plugging ring. A plugging column is arranged at the bottom end of the airbag. A plurality of rubber rings are equidistantly arranged on the plugging column. Part of the rubber rings are correspondingly clamped with the arc-shaped grooves.

[0008] Preferably, two combined sleeves are symmetrically arranged on both sides of the top surface of the valve plate. A first fixing plate is arranged at the top end of the fixing seat of the combined sleeve. A fixing bolt is arranged through between the first fixing plate and the inner bottom surface of the cover plate. A second fixing plate is arranged at the bottom end of the movable rod of the combined sleeve. A fixing bolt is arranged through between the second fixing plate and the top surface of the valve plate.

[0009] Preferably, a telescopic waterproof sleeve is installed in the middle of the top surface of the valve plate. The top end of the telescopic waterproof sleeve is fixedly connected with the inner bottom surface of the cover plate. The telescopic waterproof sleeve is sleeved outside the threaded rod and the threaded cylinder.

[0010] Preferably, a protective sleeve is arranged at the bottom end of the lower chamber. One of the plurality of rubber rings abuts against the bottom surface of the valve port. The bottom surface of the airbag abuts against the top end of the plugging ring. The top surface of the partition plate is arc-shaped and inclined to one side.

[0011] Preferably, the analysis steps of the wear amount of the valve core and the valve port by the analysis module are as follows: S1: Obtain the same erosion-resistant valve. Set pressure detection points at the contact positions of the valve core and the valve port. Divide equally according to the circumferential size at the valve port position. Install micro pressure sensors at the equal division positions and number the micro pressure sensors in a clockwise order. Perform the opening and closing operations of the valve multiple times and detect the pressure data between the valve core and the valve port during the opening and closing operations. S2: Calculate the mean value of the detected pressure data, and compare the detected pressure data with the mean value . If the absolute value of the difference between the two is less than the preset difference threshold, it is determined that the contact between the valve core and the valve port is good. The mean value is the positive pressure data of the valve core on the valve port. Then the friction force between the valve core and the valve port, the wear volume , , , is the friction coefficient, is a dimensionless wear coefficient. is the Brinell hardness of the material, is the friction stroke; S3: If the absolute value of the difference between the two is greater than the preset difference threshold, it is determined that the sealing performance between the spool and the valve port is poor, and the pressure data detected by the pressure sensors labeled , , and are retrieved and compared. , and the detection pressure data at the positions of label and and the detection pressure data at the positions of label and are respectively marked as relative group one and relative group two. If a set of data is equal in the detection pressure data within relative group one and relative group two, and the absolute value of the difference in the other set of data is greater than the preset difference threshold, it is determined that the spool is skewed, a spool warning signal is generated, and the spool warning signal is transmitted to the adjustment module.

[0012] Preferably, the analysis module performs the following steps for analyzing the wear amount affected by medium impurities: M1: Measure that the number of particles in different particle size ranges is , the particle size of each particle size range is , the volume of the measurement area is , then the particle number concentration , is the total number of particle size ranges; M2: Introduce a parameter related to the number and particle size of impurity particles. is the average particle size of impurity particles, then the wear volume affected by the number of impurity particles ; if the hardness of the impurity particles is , then the hardness ratio coefficient between the impurity and the valve structure , the wear volume affected by the impurity hardness ; the medium flow rate is , the average angle at which the impurity particles impact the valve surface is , introduce a function related to the flow rate and impact angle, then the wear volume affected by the flow rate and impact angle ; M3: Obtain the radius data of the spool and the valve port , compare the radius data detected at different positions on the circumference with the standard radius data of the corresponding item respectively, and take the one with the largest absolute value of the difference between the two as the radius wear amount , the wear volume ; M4: Divide the calculated radius wear amount by the time taken to reach that radius wear amount , to obtain the standard wear rate; considering the influence of impurities inside the medium, the actual wear rate ; calculate the time required to reach the preset wear threshold according to the actual wear rate. After reaching this time, generate a spare part replacement signal and transmit the spare part replacement signal to the adjustment module.

[0013] Preferably, the steps for the adjustment module to perform operations are as follows: Q1: After receiving the valve core warning signal, emit a short beeping warning through the buzzer module set inside the controller of the driving motor to inform the staff to promptly adjust the skew of the valve core; Q2: After receiving the spare part replacement signal, emit a long beeping warning through the buzzer module set inside the controller of the driving motor to inform the staff to promptly replace the valve core.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the cooperation of the driving motor, the threaded rod, the threaded barrel and the valve plate, it is convenient to accurately control the lifting of the valve plate, improve the control accuracy of valve opening and closing, and further enable the precise adjustment function of the valve flow rate. Then, through the cooperation of the airbag on the bottom surface of the valve plate and the arc-shaped groove on the inner wall of the plugging ring at the valve port and the rubber ring on the plugging column, it is convenient to form a multi-stage sealing structure when the valve is closed, improve the sealing performance of the valve, and further effectively prevent medium leakage. Also, through the cooperation of the combined sleeve and the valve plate, it is convenient to guide the movement of the valve plate, improve the stability of the valve plate movement, and further avoid the valve plate from shifting during movement, ensuring the sealing effect. By sleeving the telescopic waterproof sleeve outside the threaded rod and the threaded barrel, it is convenient to prevent the medium from eroding the threaded rod and the threaded barrel, improve the erosion resistance effect of the transmission components, and further ensure the stability and reliability of the transmission. In addition, the combined sleeve adopts a modular design, and its fixed seat and movable rod are respectively connected to the cover plate and the valve plate through bolts, which is convenient to separately disassemble and replace the worn movable rod or fixed seat after long-term use, improve the convenience and economy of maintenance, and further reduce the shutdown maintenance time and lower the maintenance cost. Finally, it solves the problem of wear and leakage caused by the rigid direct contact between the traditional valve core and the valve port, and improves the erosion resistance performance and sealing reliability of the nuclear power plant valve; 2. Through the monitoring of the sealing performance of the valve core and the valve port by the analysis module, potential sealing hazards can be detected in a timely manner, avoiding medium leakage caused by sealing problems, effectively improving the sealing reliability of the valve, and solving the defect of easy sealing problems due to the rigid contact between the traditional valve core and the valve port; comprehensively considering various factors such as the pressure between the valve core and the valve port, the number of impurity particles, particle size, hardness, medium flow rate and impact angle, the calculation of the wear amount is more accurate, and it can more accurately reflect the wear situation of the nuclear power plant valve during actual operation. Description of the Drawings

[0015] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the first perspective of the overall structure proposed by the present invention; Figure 2 It is a schematic diagram of the first perspective of the overall sectional structure proposed by the present invention; Figure 3 It is an enlarged schematic diagram of the overall sectional structure of the threaded cylinder proposed by the present invention; Figure 4 It is an enlarged schematic diagram of the overall sectional structure of the insertion ring proposed by the present invention; Figure 5 It is a system flowchart proposed by the present invention.

[0016] Reference numerals in the figures: 1, valve body; 2, partition plate; 3, cover plate; 4, protective sleeve; 5, telescopic waterproof sleeve; 6, threaded rod; 7, threaded cylinder; 8, valve plate; 9, airbag; 10, insertion ring; 11, rubber ring; 12, combined sleeve. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Embodiment: Refer to Figures 1-5, A valve with super erosion resistance function for nuclear power plants in the present invention includes a valve body 1. A partition 2 is provided inside the valve body 1 to divide the inside of the valve body 1 into an upper chamber and a lower chamber. A flange interface is provided at the top of the upper chamber, and a cover plate 3 is provided on the flange interface. A plurality of fixing bolts are passed through the circumferential side of the cover plate 3 and the flange interface. A frame is provided in the middle of the top surface of the cover plate 3, and a driving motor is installed on the top surface of the frame. This structure constructs the basic framework of the valve through the cooperation of the valve body 1, the partition 2, the flange interface and the cover plate 3, providing support for the installation of subsequent components; the setting of the driving motor provides a power source for the opening and closing of the valve, improving the integration degree and operation reliability of the overall structure of the valve, and thus realizing the basic installation and driving functions of the valve. The output shaft of the driving motor penetrates the inner bottom surface of the cover plate 3 and is coaxially fixedly connected with a threaded rod 6. A shaft seal is sleeved on the frame at the output shaft of the driving motor. A threaded cylinder 7 is screwed on the lower part of the threaded rod 6. The bottom end of the threaded cylinder 7 is fixedly connected with a valve plate 8. An airbag 9 is provided on the bottom surface of the valve plate 8. The driving motor converts the rotational motion into the linear lifting motion of the valve plate 8 through the threaded transmission between the threaded rod 6 and the threaded cylinder 7, realizing the precise control of the valve opening. The shaft seal can prevent radioactive media from leaking into the driving system. The airbag 9 provides a flexible buffer structure for subsequent sealing, improving the valve control accuracy and leakage prevention ability, and thus realizing the precise flow regulation and dynamic sealing functions. A valve orifice is opened in the middle of the top surface of the partition 2. A plug-in ring 10 is provided at the valve orifice. A plurality of arc-shaped grooves are equidistantly opened on the inner wall of the plug-in ring 10. A plug-in column is provided at the bottom end of the airbag 9. A plurality of rubber rings 11 are equidistantly provided on the plug-in column. Part of the rubber rings 11 is correspondingly clamped with the arc-shaped grooves. When the valve plate 8 descends, the rubber rings 11 and the arc-shaped grooves form a multi-stage clamping and sealing structure, using rubber elasticity to compensate for machining errors, while isolating the medium from the metal contact surface and reducing the corrosion risk; the airbag 9 is compressed and deformed to fill the gap, further improving the sealing performance, solving the problem of easy wear and leakage of traditional rigid seals, and improving the sealing reliability and erosion resistance of the valve.

[0019] In the present invention, two combined sleeves 12 are symmetrically arranged on both sides of the top surface of the valve plate 8. A first fixing plate is provided at the top end of the fixing seat of the combined sleeve 12. A fixing bolt is passed through between the first fixing plate and the inner bottom surface of the cover plate 3. A second fixing plate is provided at the bottom end of the movable rod of the combined sleeve 12. A fixing bolt is passed through between the second fixing plate and the top surface of the valve plate 8. The fixing seat and the movable rod of the combined sleeve 12 are detachably connected by bolts, providing double-guided support for the valve plate 8 and restricting the lateral displacement of the valve plate 8; the modular design facilitates the separate replacement of worn guiding components, improving the convenience and economy of valve maintenance, and thus achieving the dual effects of stable movement and low-cost maintenance of the valve plate 8. A telescopic waterproof sleeve 5 is installed in the middle of the top surface of the valve plate 8. The top end of the telescopic waterproof sleeve 5 is fixedly connected to the inner bottom surface of the cover plate 3. The telescopic waterproof sleeve 5 is sleeved outside the threaded rod 6 and the threaded barrel 7. The telescopic waterproof sleeve 5 is made of a flexible material and can freely expand and contract with the lifting of the valve plate 8, forming a sealing barrier to isolate the medium from the transmission components; preventing the radioactive medium from eroding the threaded rod 6 and the threaded barrel 7, extending the service life of the transmission system, improving the long-term operation reliability of the valve, and thus ensuring the stable performance of the transmission mechanism. A protective sleeve 4 is provided at the bottom end of the lower chamber. One of the plurality of rubber rings 11 abuts against the bottom surface of the valve port. The bottom surface of the airbag 9 abuts against the top end of the insertion ring 10. The top surface of the partition plate 2 is arc-shaped and inclined to one side. When the valve is opened or closed, the protective sleeve 4 can buffer the impact of the water flow on the lower chamber, avoiding damage to the lower chamber due to the impact of the water flow. After the valve is closed, the lower chamber of the traditional valve is prone to water accumulation and corrosion. The protective sleeve 4 has a tight structure and can block the direct contact between the accumulated water and the lower chamber, protecting the lower chamber of the valve; the rubber ring 11 and the airbag 9 form a double flexible seal. Combined with the arc-shaped flow guiding surface design of the partition plate 2, it reduces the medium retention and reduces the local erosion corrosion, improving the corrosion resistance of the valve and the medium flow efficiency.

[0020] A driving motor is installed on the top of the cover plate 3. An acquisition module, an analysis module and an adjustment module are arranged inside the controller of the driving motor; Obtain the same erosion-resistant valve, set pressure detection points at the contact position between the valve core and the valve port, and divide it according to the circumferential size at the valve port position equally. Install micro pressure sensors at the equally divided positions, and number the micro pressure sensors in a clockwise order. Perform the opening and closing operations of the valve multiple times to detect the pressure data between the valve core and the valve port during the opening and closing operations; Retrieve the pressure data detected by the pressure sensors corresponding to the same number at the same time, arrange the detected pressure data in ascending order, and number the arranged detected pressure data. Obtain the detected pressure data with numbers and , denote them as data and data , and calculate the absolute value of the difference between the two Calculate the absolute value of the calculated difference and the data and the data Set the fluctuation range of the detected pressure data , determine the detected pressure data outside the fluctuation range as detected outliers, and after removing the detected outliers, calculate the mean of the remaining detected pressure data, and use the calculated mean of the remaining detected pressure data as the pressure data detected at this time point; Calculate the detected mean of the pressure data , and compare the detected pressure data with the mean . If the absolute value of the difference between the two is less than the preset difference threshold, it is determined that the spool and the valve port are in good contact, and the mean is the positive pressure data of the spool on the valve port, then the friction force between the spool and the valve port , the wear volume , is the friction coefficient, is the dimensionless wear coefficient, is the Brinell hardness of the material, is the friction stroke; otherwise, it is determined that the sealing performance between the spool and the valve port is poor, and the pressure data detected by the pressure sensors labeled , , and are retrieved and compared, , and the pressure data detected at the positions of label and and label and are respectively marked as relative group one and relative group two. If a set of data in relative group one and relative group two is equal and the absolute value of the difference in the other set of data is greater than the preset difference threshold, it is determined that the spool is skewed, a spool warning signal is generated, and the spool warning signal is transmitted to the adjustment module; Detect the impurity content in the flowing medium through a laser particle size analyzer, and measure that the number of particles in different particle size ranges is , the particle size of each particle size range is , the volume of the measurement area is , then the particle number concentration , is the total number of particle size ranges; calculate the volume of a single particle according to the particle size of each particle size range; Introduce a parameter related to the number and particle size of impurity particles is the average particle size of the impurity particles, and the wear volume affected by the number of impurity particles ; if the hardness of the impurity particles is , then the hardness ratio coefficient between the impurity and the valve structure , and the wear volume affected by the impurity hardness ; the medium flow rate is , the average angle at which the impurity particles impact the valve surface is , introducing a function related to the flow rate and the impact angle, then the wear volume affected by the flow rate and the impact angle , the exponent 2.4 is a correction exponent after comprehensively considering factors such as the multiple interactions between the particles and the valve surface and the energy transfer loss in the actual working conditions, and the exponent 1.3 is the fitting result based on the wear experiment data at different angles; Obtain the radius data of the valve core and the valve port , compare the radius data detected at different positions on the circumference with the standard radius data of the corresponding item respectively, and take the one with the largest absolute value of the difference between the two as the radius wear amount , and the wear volume ; divide the calculated radius wear amount by the time to reach this radius wear amount to obtain the standard wear rate; considering the influence of impurities inside the medium, the actual wear rate ; calculate the time required to reach the preset wear threshold according to the actual wear rate. After reaching this time, generate a replacement part signal and transmit the replacement part signal to the adjustment module.

[0021] Working principle: When the present invention is in use, water first flows into the lower chamber. When it is necessary to open the valve to allow water to flow, the drive motor on the middle part of the top surface of the cover plate 3 starts, and its output shaft rotates to drive the coaxial and fixedly connected threaded rod 6 to rotate. Since the lower end of the threaded rod 6 is screwed to the threaded sleeve 7, the threaded sleeve 7 drives the valve plate 8 to gradually rise. At this time, the combined sleeves 12 symmetrically arranged on both sides of the top surface of the valve plate 8 play a guiding role to ensure that the valve plate 8 rises smoothly and avoids lateral displacement. The airbag 9 on the bottom surface of the valve plate 8 is separated from the insertion ring 10 at the valve port, and the rubber ring 11 no longer seals and blocks, so the water overflows upward through the valve port into the upper chamber and flows along the preset path. When it is necessary to close the valve, the drive motor rotates in the reverse direction, driving the threaded rod 6 to rotate in the reverse direction, and the threaded sleeve 7 and the valve plate 8 descend accordingly. The combined sleeve 12 ensures the stable downward movement of the valve plate 8. The telescopic waterproof sleeve 5 sleeved outside the threaded rod 6 and the threaded sleeve 7 prevents radioactive water from eroding the transmission components. The valve plate 8 continues to descend. After the airbag 9 contacts the top end of the insertion ring 10, it is compressed and deformed, and the rubber ring 11 on the bottom end plug post is correspondingly clamped with the arc-shaped groove on the inner wall of the insertion ring 10 to form a multi-stage sealing structure to seal the valve port and prevent water flow through, realizing the closing of the valve; thus the use of the device is completed.

[0022] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A valve with super corrosion resistance for use in a nuclear power plant, comprising a valve body (1), characterized in that: A partition plate (2) is provided inside the valve body (1) to divide the interior of the valve body (1) into an upper chamber and a lower chamber, a flange interface is provided at the top of the upper chamber, a cover plate (3) is provided on the flange interface, a plurality of fixing bolts are passed through the circumference of the cover plate (3) and the flange interface, a frame is provided in the middle of the top surface of the cover plate (3), and a driving motor is installed on the top surface of the frame; A driving motor is installed on the top of the cover plate (3), and an acquisition module, an analysis module and an adjustment module are arranged inside the controller of the driving motor; An acquisition module acquires pressure data, impurity content data, and radius data of the valve core and valve port detected by the pressure sensor, laser particle size analyzer, and rangefinder; The analysis module retrieves and analyzes the data acquired by the acquisition module to determine whether the valve core and the valve port are skewed and calculate the wear amount of the valve core and the valve port; If deflection occurs, a valve core warning signal is generated and transmitted to the regulating module; Then, the wear amount is calculated and adjusted according to the impurity content in the medium, and the time when the wear threshold is reached is determined. After the calculated time is reached, a part replacement signal is generated and transmitted to the adjustment module; The adjustment module receives the signal transmitted by the analysis module and performs corresponding operations.

2. The valve with super corrosion resistance for use in a nuclear power plant according to claim 1, characterized in that: The output shaft of the driving motor passes through the inner bottom surface of the cover plate (3) and is coaxially fixedly connected with a threaded rod (6); the frame is sleeved with a shaft seal at the output shaft of the driving motor; a threaded barrel (7) is threadedly connected to the lower end of the threaded rod (6); a valve plate (8) is fixedly connected to the bottom end of the threaded barrel (7); and an air bag (9) is provided on the bottom surface of the valve plate (8).

3. A valve with super corrosion resistance for use in a nuclear power plant according to claim 2, characterized in that: A valve opening is provided in the middle of the top surface of the partition (2), a plug-in ring (10) is provided at the valve opening, a plurality of arc-shaped grooves are provided on the inner wall of the plug-in ring (10) at equal intervals, a plug-in column is provided at the bottom end of the airbag (9), a plurality of rubber rings (11) are provided on the plug-in column at equal intervals, and a portion of the rubber ring (11) is snap-fitted with the arc-shaped grooves.

4. A valve with super corrosion resistance for use in a nuclear power plant according to claim 3, characterized in that: Two combined sleeves (12) are symmetrically provided on both sides of the top surface of the valve plate (8); a first fixing plate is provided at the top end of a fixing seat of the combined sleeve (12); fixing bolts are passed through between the first fixing plate and the inner bottom surface of the cover plate (3); a second fixing plate is provided at the bottom end of a movable rod of the combined sleeve (12); fixing bolts are passed through between the second fixing plate and the top surface of the valve plate (8).

5. A valve with super corrosion resistance for use in a nuclear power plant according to claim 4, characterized in that: A telescopic waterproof sleeve (5) is installed in the middle of the top surface of the valve plate (8), the top end of the telescopic waterproof sleeve (5) is fixedly connected to the inner bottom surface of the cover plate (3), and the telescopic waterproof sleeve (5) is sleeved outside the threaded rod (6) and the threaded cylinder (7).

6. A valve with super corrosion resistance for use in a nuclear power plant according to claim 5, characterized in that: A protective sleeve (4) is provided at the bottom end of the lower chamber, one of the rubber rings (11) abuts against the bottom surface of the valve port, the bottom surface of the airbag (9) abuts against the top end of the plug-in ring (10), and the top surface of the partition (2) is arc-shaped and tilted to one side.

7. The valve with super corrosion resistance for use in a nuclear power plant according to claim 1, characterized in that: The analysis module analyzes the wear of the valve core and valve port as follows: S1: Get the same erosion-resistant valve, set the pressure detection point at the contact position between the valve core and the valve port, and perform pressure detection according to the circumference size at the valve port position. Divide equally, install micro pressure sensors at the divided positions, and number the micro pressure sensors in clockwise order, perform the valve opening and closing operations for many times, and detect the pressure data between the valve core and the valve port during the opening and closing operations; S2: Calculate the detected The mean of the pressure data , and compare the detected pressure data with the mean Compare the difference. If the absolute value of the difference between the two is less than the preset difference threshold, it is determined that the valve core and the valve port are in good contact. is the positive pressure data of the valve core on the valve port, then the friction between the valve core and the valve port , wear volume , is the friction coefficient, is the dimensionless wear coefficient, is the Brinell hardness of the material, is the friction stroke; S3: If the absolute value of the difference between the two is greater than the preset difference threshold, it is determined that the sealing between the valve core and the valve port is poor, and the value labeled , , and The pressure sensor detects the pressure data and compares them. , mark and and label and The detection pressure data at the positions are marked as relative group one and relative group two respectively. If one set of detection pressure data in relative group one and relative group two is equal, and the absolute value of the difference of the other set of data is greater than the preset difference threshold, it is determined that the valve core position is skewed, a valve core warning signal is generated, and the valve core warning signal is transmitted to the adjustment module.

8. The valve with super corrosion resistance for use in a nuclear power plant according to claim 7, characterized in that: The steps for the analysis module to analyze the wear volume affected by medium impurities are as follows: M1: Measure different particle size ranges The number of particles is , the particle size of each particle size interval is , the volume of the measurement area is , then the particle number concentration , is the total number of particle size intervals; M2: Introducing parameters related to the number and size of impurity particles , is the average particle size of the impurity particles, then the wear volume affected by the number of impurity particles ; If the hardness of the impurity particles is , then the hardness ratio coefficient of impurities and valve structure is , wear volume affected by impurity hardness ; Medium flow rate is , the average angle at which impurity particles impact the valve surface is , introducing a function related to flow velocity and impact angle , then the wear volume affected by flow velocity and impact angle is ; M3: Get the radius data of the valve core and valve port The radius data detected at different positions on the circumference are compared with the standard radius data of the corresponding items, and the one with the largest absolute difference between the two is taken as the radius wear amount. , wear volume ; M4: Divide the calculated radius wear by the time it takes to reach that radius wear. , get the standard wear rate; considering the influence of impurities inside the medium, the actual wear rate ; Calculate the time required to reach the preset wear threshold based on the actual wear rate. After the time is reached, generate a replacement signal and pass the replacement signal to the adjustment module.

9. A valve with super corrosion resistance for use in a nuclear power plant according to claim 8, characterized in that: The steps for the adjustment module to perform operations are as follows: Q1: After receiving the valve core warning signal, a short buzzer warning is issued through the buzzer module set inside the controller of the drive motor to inform the staff to adjust the valve core skew in time; Q2: After receiving the replacement signal, the buzzer module set inside the controller of the drive motor will emit a long buzzer warning to inform the staff to replace the valve core in time.

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