High-pressure gas regulating system device based on stress corrosion cracking and control method of high-pressure gas regulating system device

Abstract

The invention provides a high-pressure gas regulating system device based on stress corrosion cracking and a control method thereof.The high-pressure gas regulating system device comprises a high-pressure gas source device, a high-pressure gas regulating cabinet and a high-pressure gas regulating system, a connector is arranged on the side face of the high-pressure gas regulating cabinet, and the high-pressure gas regulating system is connected with a workpiece through the connector; the high-pressure gas source device comprises a first high-pressure gas source bottle and a second high-pressure gas source bottle, the high-pressure gas adjusting system comprises a pressure dial plate, a pressure reducing valve, an electric ball valve, an electric proportional valve, a gas flow meter, a safety valve, a three-way valve and an inflation pressure maintaining structure, and the first high-pressure gas source bottle and the second high-pressure gas source bottle conduct gas conveying and gas exhausting through the inflation pressure maintaining structure. The high-pressure gas regulating system is in data connection with the upper computer, and is adapted to a crack detection system for use, a mechanical structure is regulated to generate a loading force, and an operation state in a nuclear radiation environment can be simulated, so that a workpiece generates an expansion crack on the basis of an original prefabricated crack; sensor signals can be remotely transmitted to upper computer software for display and operation.

Description

Technical Field

[0001] The present invention belongs to the field of stress corrosion cracking and high-pressure gas regulation in a nuclear radiation environment, and specifically relates to a high-pressure gas regulation system device based on stress corrosion cracking and a control method thereof. The main function of the high-pressure gas regulation system is to provide inert gas to tooling and devices, drive stress through gas pressure, and regulate the mechanism to generate load force. Background Art

[0002] my country is a major energy country. With the worsening of global warming and greenhouse effect, the shortage of green energy has become one of the important problems we face. Nuclear energy has become one of the important clean energy sources due to its advantages of cleanliness, low carbon, high efficiency and economy. However, nuclear power accidents are catastrophic and will cause serious property losses and casualties. The reasons for these situations are largely due to stress corrosion cracking at the welded joints of the devices in the nuclear reactor.

[0003] Structural materials of nuclear power plants are very susceptible to stress corrosion cracking (SCC) under the combined effects of high temperature, high pressure, complex stress loads, corrosion, neutron and other radiation exposure. The suddenness and concealment of SCC crack propagation are prominent characteristics, which greatly threaten the safety, economy and service life of nuclear power plants.

[0004] The main function of this device is to assist the crack detection system. It can provide inert gas, such as high-purity helium or nitrogen, into the tooling. It drives stress through high pressure and adjusts the mechanical structure of the device to generate load force, thereby simulating the high-pressure environment under nuclear radiation environment and causing cracks in the sample. This device needs to be used in conjunction with the crack detection system.

[0005] At present, in the field of high-pressure gas conditioning systems in nuclear radiation environments, traditional gas conditioning devices generally include: gas storage and distribution equipment, analysis and monitoring instruments and equipment, and gas conditioning equipment. The stability and accuracy of the gas conditioning system are crucial to ensuring product quality and safety. At this stage, traditional high-pressure gas conditioning systems generally require manual control, which not only loses accuracy, but also cannot guarantee the safety of operators. When operating in a nuclear radiation environment, long-term exposure to nuclear radiation will lead to a decrease in the body's immunity and make it easy to be infected by bacteria and viruses. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a high-pressure gas conditioning system device based on stress corrosion cracking and its control method, including mechanical structure design and installation, hardware schematic drawing and printed circuit board (PCB) production, embedded software driver and host computer development; adapted to the use of crack detection system, adjusting the mechanical structure to generate load force, able to simulate the working state under nuclear radiation environment, so that the sample will generate extended cracks on the basis of the original prefabricated cracks. It can achieve accurate control of gas pressure in the system, long-distance transmission of sensor signals to the host computer software display, simple operation interface, friendly human-computer interaction, and "simple" operation.

[0007] To achieve the above object, the technical solution adopted by the present invention is: A high-pressure gas conditioning system device based on stress corrosion cracking, characterized in that it includes a high-pressure gas source device, a high-pressure gas conditioning cabinet and a high-pressure gas conditioning system installed in the high-pressure gas conditioning cabinet, a connector is provided on the side of the high-pressure gas conditioning cabinet, and the high-pressure gas conditioning system is connected to the workpiece through the connector, the high-pressure gas source device includes a first high-pressure gas source bottle and a second high-pressure gas source bottle, the high-pressure gas conditioning system includes a first pressure gauge, a second pressure gauge, a first pressure reducing valve, a second pressure reducing valve, an electric ball valve, a first electric proportional valve, a second electric proportional valve, a gas flow meter, a first safety valve, a second safety valve, a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve, the electric ball valve includes a first electric ball valve, a second electric ball valve, a third electric ball valve, a fourth electric A first electric ball valve, a fifth electric ball valve, a sixth electric ball valve, a seventh electric ball valve, an eighth electric ball valve and a ninth electric ball valve, the first high-pressure gas source bottle is provided with a first air inlet, a first air outlet and a first charging port, the second high-pressure gas source bottle is provided with a second air inlet, a second air outlet and a second charging port, the first charging port and the second charging port are respectively provided with a first manual ball valve and a second manual ball valve, the first air inlet and the second air inlet are respectively connected to the first pressure reducing valve and the second pressure reducing valve through the first stainless steel pipe section and the second stainless steel pipe section, the first pressure reducing valve and the second pressure reducing valve are connected to a two-way joint through the third stainless steel pipe section, a third manual ball valve and a first safety valve are installed between the two-way joint and the second pressure reducing valve, the first The gas in the first high-pressure gas source bottle and the second high-pressure gas source bottle is reduced in pressure by the first pressure reducing valve and the second pressure reducing valve, and then transported to the first safety valve through the third manual ball valve. The gas is divided into two paths of gas through a two-way joint. One path of gas passes through the first electric ball valve to control whether the gas is transported downward. If it continues to be transported, the gas passes through the first electric proportional valve and the second electric proportional valve to control the gas flow rate, and then passes through the gas flow meter and the pressure sensor. The two-way joint is connected to the first three-way valve through the fourth stainless steel pipe section, and the fourth stainless steel pipe section is equipped with a second safety valve. The other path of gas is controlled by the second safety valve on the fourth stainless steel pipe section and transported to the first three-way valve. The other two valves of the first three-way valve are respectively connected to the second three-way valve and the relief valve. air port, the other two valves of the second three-way valve are respectively connected to the second electric ball valve and the third three-way valve, the other two valves of the third three-way valve are respectively connected to the fifth stainless steel pipe section and the fourth three-way valve, the fifth stainless steel pipe section is connected to the first chamber of the tooling through a connector, the third electric ball valve and the fourth electric ball valve are installed on the fifth stainless steel pipe section, the other two valves of the fourth three-way valve are respectively connected to the sixth stainless steel pipe section and the seventh stainless steel pipe section, the sixth stainless steel pipe section is connected to the second chamber of the tooling through a connector, the fifth electric ball valve and the sixth electric ball valve are installed on the sixth stainless steel pipe section, the seventh stainless steel pipe section is connected to the third chamber of the tooling through a connector, the seventh stainless steel pipe section is installed with the seventh electric ball valve and the eighth electric ball valve,The seventh stainless steel pipe segment is connected to the eighth stainless steel pipe segment, the eighth stainless steel pipe segment is connected to the first pressure gauge, the eighth stainless steel pipe segment is connected to a vent pipe, the first air outlet is connected to the sixth electric ball valve on the sixth stainless steel pipe segment through the ninth stainless steel pipe segment, the eighth stainless steel pipe segment is installed with a ninth electric ball valve, and the second air outlet is connected to the second pressure gauge through the tenth stainless steel pipe segment.

[0008] It also includes an inflation and pressure-maintaining structure, the first high-pressure gas source bottle and the second high-pressure gas source bottle are used to transmit and exhaust gas respectively through the inflation and pressure-maintaining structure, the first high-pressure gas source bottle and the second high-pressure gas source bottle are used to generate gas source, and the gas source transmission is divided into two gas paths, namely the main gas path and the auxiliary gas path, the main gas path is equipped with a first main pressure detection gauge for detecting the gas pressure of the main gas path, the main gas path enters the first 3L gas storage tank after being controlled by the main manual regulating valve, the first 3L gas storage tank is equipped with a second main pressure detection gauge, the gas in the main gas path is diverted by the main safety valve and the first main manual regulating valve, one path The gas enters the branch through the second main manual regulating valve, and the other gas is controlled by the first main electric ball valve and the flow rate control valve. The flow rate control valve is connected to the pressure monitor to detect the pressure of the output gas in real time. After the two gases merge, the first main air inlet, the second main air inlet, the third main air inlet and the main air release port are formed respectively. The first flow monitor and the second flow monitor are respectively arranged between the first main air inlet and the second main air inlet and the pressure monitor for flow monitoring. The second main electric ball valve is arranged between the third main air inlet and the pressure monitor, and a third main electric ball valve is arranged as the main return port.

[0009] The auxiliary gas circuit enters the second 3L gas tank after being controlled by an auxiliary manual ball valve. An auxiliary pressure detection gauge is installed on the second 3L gas tank. The gas in the auxiliary gas circuit transports the high-pressure gas to the first auxiliary electric ball valve through the auxiliary safety valve and the auxiliary manual regulating valve. The first auxiliary electric ball valve serves as an auxiliary air inlet, and a second auxiliary electric ball valve is set as an auxiliary air return port.

[0010] It also includes a host computer, and the high-pressure gas regulating system is connected to the host computer data to view and control the components and values ​​in the high-pressure gas regulating system in real time.

[0011] In the above structure: a high-pressure gas regulating system device based on stress corrosion cracking proposed by the present invention includes a high-pressure gas source device, a high-pressure gas regulating cabinet and a high-pressure gas regulating system installed in the high-pressure gas regulating cabinet. A connector is provided on the side of the high-pressure gas regulating cabinet. The high-pressure gas regulating system is connected to the workpiece through the connector. The high-pressure gas source device includes a first high-pressure gas source bottle and a second high-pressure gas source bottle. The first high-pressure gas source bottle and the second high-pressure gas source bottle are used to generate gas sources. The high-pressure gas source device is connected to the high-pressure gas regulating system through a pressure reducing valve and a stainless steel pipe section. The gas cylinder capacity of the first high-pressure gas source bottle and the second high-pressure gas source bottle is 40L. During the test, the cabinet door needs to be closed to ensure the safety of the operator. The gas generated by the high-pressure gas regulating system is connected to the external tooling through a connector for inflation and deflation. The high-pressure gas source bottle and the high-pressure gas regulating cabinet should not be placed too close, otherwise it may affect the gas flow rate and the working state of the pressure reducing valve.

[0012] The working principle of the high pressure gas conditioning system is as follows: The gas in the first high-pressure gas source bottle and the second high-pressure gas source bottle is first decompressed through the first pressure reducing valve and the second pressure reducing valve to reduce the gas pressure to a pressure value that does not damage the tooling, and then transported to the first safety valve through the third manual ball valve; Here, the gas is divided into two paths through a two-way joint. One path of gas passes through the first electric ball valve to control whether the gas can go down. If it continues to be transported, it passes through the first electric proportional valve and the second electric proportional valve to control the gas flow rate. In order to detect the parameters of the gas in the tooling, the gas passing through this path is queried through the pressure sensor for its pressure value and the gas flow meter for its current instantaneous flow rate; The other gas passes through the fourth stainless steel pipe section and the second safety valve to control whether the gas is connected. If connected, the gas is transmitted to the third electric ball valve through the second three-way valve and released when the test is completed; The gas is continuously transported, transmitted to the second electric ball valve through the third three-way valve, and then inflated to the first chamber of the tooling through the fifth stainless steel pipe section, and then transmitted to the fifth electric ball valve through the fourth three-way valve, and then inflated to the second chamber of the tooling through the sixth stainless steel pipe section, and the gas is continuously transported through the seventh stainless steel pipe section, and transmitted to the seventh electric ball valve and the eighth electric ball valve, and then inflated to the third chamber of the tooling through the seventh stainless steel pipe section; By inflating and pressurizing the three chambers of the workpiece, driving stress, and adjusting the mechanical structure of the workpiece to generate load force, the workpiece can generate extended cracks based on the original prefabricated cracks, thereby simulating the performance of the workpiece in a high-pressure environment under a nuclear radiation environment; When the experiment is completed, the gas in the high-pressure gas regulating system is released through the ninth electric ball valve.

[0013] The control logic of the inflation and pressure-maintaining gas circuit of the high-pressure gas regulating system: In the process of controlling gas, it is mainly divided into two gas paths.

[0014] One is the main gas line. The gas pressure of the gas source is displayed by the first main pressure detection gauge, and enters the first 3L gas tank through the main manual pressure regulating valve. At the same time, its pressure is displayed by the second main pressure monitoring gauge, and passes through the main safety valve and the first main manual regulating valve to prevent the gas flow rate from being unable to be controlled when the electric valve fails. After passing through the first main manual regulating valve, the gas is divided into two routes. One route passes through the second main manual regulating valve to enter the branch, and the other route must first pass through the flow rate control valve for pressure monitoring; after the two routes of gas meet, they are divided into four routes: one route is discharged through the pipeline, one route enters the first main air inlet through the first flow monitor to ventilate the first chamber, one route enters the second main air inlet through the second flow monitor to ventilate the second chamber, and the last route is controlled by the second main electric ball valve and enters the third main air inlet. In the main gas line, there is also a separate third main electric ball valve as the main return port.

[0015] Another auxiliary gas line, through the auxiliary manual pressure regulating valve, also enters the second 3L gas tank of 3L, and then passes through the auxiliary safety valve and the auxiliary manual regulating valve to deliver the gas to the first auxiliary electric ball valve, which serves as the auxiliary air inlet. Similar to the main gas line, there is a second auxiliary electric ball valve as the auxiliary air return port.

[0016] The position and name of each sensor are marked in the host computer, BV: electric ball valve, EPV: electric proportional valve, PG: pressure gauge, GFM: gas flow meter; you can also see the information of each sensor. The value of the pressure gauge can be displayed in the PG box, and the value of each pressure sensor can be displayed in: PG1, PG2, PG3, PG4, PG5, the unit is Pa; the value of the gas flow meter can be displayed in the GFM1 box, the unit is SCCM; the valve opening of the electric proportional valve is controlled in the EPV box, the left side is the current ratio, and the right side is the current real-time opening; the opening and closing of the electric ball valve can be controlled in the BV1 box.

[0017] As a preferred technical solution of the present invention: the high-pressure gas source device also includes a gas cylinder fixing frame, the first high-pressure gas source bottle and the second high-pressure gas source bottle are respectively fixed to the gas cylinder fixing frame by fixing buckles, a push rod is installed above the gas cylinder fixing frame, and a universal wheel is installed below the gas cylinder fixing frame by screws.

[0018] In the above structure: the first high-pressure gas source bottle and the second high-pressure gas source bottle are fixed on the gas bottle fixing frame by fixing buckles respectively. When the staff uses it, it is convenient to use because universal wheels are installed underneath and can be pushed by a push rod.

[0019] As a preferred technical solution of the present invention: a front sheet metal is installed above the high-pressure gas conditioning cabinet, and a pressure display is arranged on the front sheet metal. The pressure display includes a first pressure display and a second pressure display. The first pressure display is connected to the first pressure gauge to display the pressure of the first high-pressure gas source bottle, and the second pressure display is connected to the second pressure gauge to display the pressure of the second high-pressure gas source bottle.

[0020] In the above structure: the first pressure display installed on the front sheet metal is used to display the pressure of the first high-pressure gas source bottle, and the second pressure display is used to display the pressure of the second high-pressure gas source bottle, which is convenient for real-time viewing of the gas in the first high-pressure gas source bottle and the second high-pressure gas source bottle, and timely opening of the two gas source bottles to ensure that the gas pressure in the device reaches a stable and controllable range, which is convenient for staff to check.

[0021] As a preferred technical solution of the present invention: indicator lights are also provided on the front sheet metal, and the indicator lights include a first indicator light for indicating that the high-pressure gas regulating system is working normally, a second indicator light for indicating that the electric ball valve is working normally, and a third indicator light for indicating that the electric proportional valve is working normally.

[0022] In the above structure: the front sheet metal is also provided with an indicator light, which can inform the user of the working status and fault status of the device. The indicator lights include a first indicator light for indicating that the high-pressure gas regulating system is working normally, a second indicator light for indicating that the electric ball valve is working normally, and a third indicator light for indicating that the electric proportional valve is working normally. The first indicator light indicates that the system power supply is normal and the program is running normally, and the first indicator light is off, indicating that the system power supply is abnormal; the second indicator light indicates that the electric ball valve control is normal, and the second indicator light is off, indicating that there is a fault in the electric ball valve control; the third indicator light indicates that the electric proportional valve control is normal, and the third indicator light is off, indicating that there is a fault in the electric proportional valve control.

[0023] As a preferred technical solution of the present invention: a cabinet door is hinged on the high-pressure gas conditioning cabinet, a concealed handle is provided on the cabinet door, and a Fumar wheel is installed at the bottom of the high-pressure gas conditioning cabinet.

[0024] In the above structure: the pressure regulating gas cabinet controls the switch of the 840*540*1240mm cabinet door through a 100*40mm concealed handle, the distance between the two concealed handles is 100.5mm, the 980*730mm cabinet door is equipped with hinges or latches, the inside of the door is magnetically attracted, and the distance between the concealed handle and the cabinet door is 385mm; the high-pressure gas regulating cabinet can be dragged by 4 Fuma wheels installed at the bottom, which has high flexibility.

[0025] As a preferred technical solution of the present invention: the side of the high-pressure gas conditioning cabinet is provided with an opening for observing the internal operation of the high-pressure gas conditioning cabinet, a first connecting hole and a second connecting hole for installing a gas transmission hose, and a heat dissipation hole for dissipating heat from the high-pressure gas conditioning cabinet.

[0026] In the above structure: the opening with a size of 200*100cm and a chamfer of 10mm is 50mm away from the side edge and 50mm away from the top edge in order to facilitate observation of the operation status inside the tooling; the heat dissipation holes below are for better heat dissipation of the high-pressure gas conditioning cabinet without heat accumulation. The first connecting hole and the second connecting hole are 320mm apart in center distance, the center of the circle is 110mm away from the lower plate, and the center size is 110mm.

[0027] On the other side of the high-pressure gas conditioning cabinet, there is no round hole connected to the tooling. In order to better observe the internal operation of the high-pressure gas conditioning system, a 200*100 hole with a chamfer of 10mm is still opened.

[0028] Behind the high-pressure gas regulating system, there is a 980*730mm rear cabinet door, which has the same specifications as the cabinet door, and above it is a 730*230mm back sheet metal, which has the same specifications as the front sheet metal.

[0029] As a preferred technical solution of the present invention: the gases in the first high-pressure gas source bottle and the second high-pressure gas source bottle are both high-concentration nitrogen.

[0030] As a preferred technical solution of the present invention: the high-pressure gas regulating system also includes a power supply unit, an RS485 communication unit, an RS422 communication unit, a serial port debugging unit and an electric ball valve relay unit, the power supply unit includes a 5V power supply module and a 3.3V power supply module, which are used to power the high-pressure gas regulating system, the RS485 communication unit is used to enable the host computer to read data of the first electric proportional valve, the second electric proportional valve, the flow meter, the first pressure gauge and the second pressure gauge, the RS422 communication unit is used to realize communication between the high-pressure gas regulating system and the host computer, the serial port debugging unit is used for external line debugging, and the electric ball valve relay unit is used to control all electric ball valves in the high-pressure gas regulating system.

[0031] In the above structure: the high-pressure gas regulating system also includes a power supply unit, an RS485 communication unit, an RS422 communication unit, a serial port debugging unit and an electric ball valve relay unit. Among them, the electric ball valve relay unit is a unit for controlling the electric ball valve. In the control logic of the electric ball valve, taking a single electric ball valve as an example, the on and off of the electric ball valve is controlled by the high and low levels of the IO port PC8 of the single-chip microcomputer. When PC8 is at a low level, the transistor 9013 is turned on, so that the relay is in a normally open state and the electric ball valve is opened, otherwise the electric ball valve is closed. It is only necessary to connect the open valve, close valve and common end of the electric ball valve to the OPEN_PWR, CLOSE_PWR and COM of the relay respectively, and the on and off of the electric ball valve can be controlled by controlling the high and low levels of the IO port PC8 of the single-chip microcomputer.

[0032] The RS485 communication unit is used to enable the host computer to read the data of the first electric proportional valve, the second electric proportional valve, the flow meter, the first pressure gauge and the second pressure gauge. The RS485 communication unit uses the MAX13487 chip to convert the TTL level to the RS485 level. The MAX13487 is a +5V powered, half-duplex, ±15kV ESD protected RS-485 / RS-422 compatible transceiver, which includes one driver and one receiver. It has a hot-swap function and can eliminate fault transient signals on the bus during power-on or hot insertion. It is a hardware interface derived from RS485. It is a 4-pin interface that leads to A2, B2, 24V power supply and GND. The 24V power supply and GND are to power the RS485 sensor. The RS485 sensors include: electric proportional valves, flow meters and pressure gauges, all of which complete data reading through RS485 communication.

[0033] The RS422 communication unit is used to realize the communication between the high-pressure gas conditioning system and the host computer. By converting the TTL level of the serial port into the RS422 level, the MAX488CSA chip is used, and the data rate is as high as 250kbps. The integrated protection improves the reliability of the system. The output end is protected by R514, R515, R516, and R517, and the resistance is 10 ohms. In the MAX488CSA chip, two capacitors, one large and one small, are connected in series between the power supply and the ground for filtering, which are 10uF and 100nF respectively.

[0034] In this high-pressure gas conditioning system, a 36V input voltage is used for power supply, and the output voltage is 24V. During the test, it is necessary to detect whether the output voltage can reach 24V to verify the function and stability of the power module. This 24V power supply is used to power the gas flow meter, pressure gauge and electric ball valve. The hardware system of this high-pressure gas conditioning system also needs to power the relay and the microcontroller master. The TPS5450 chip is used, a high-output current PWM converter, which integrates a low-resistance high-side N-channel MOSFET. According to the calculation:

[0035] Use TD1509-5V to step down the 24V voltage to 5V, connect five capacitors in series between the power supply and the ground, all of which are 100uF, and connect a light-emitting diode and a resistor in series between 5V and GND. When the light-emitting diode lights up, it means that the 5V power supply is working normally.

[0036] Use LD1117-3.3V to step down the 5V voltage to 3.3V. At the input end, use C412: 10uF and C413: 100nF to filter out the front-end noise. At the output end, use three 10uF / 16V capacitors and two 100nF capacitors to filter out the noise.

[0037] The serial port debugging unit is used for external line debugging.

[0038] A control method for a high-pressure gas conditioning system device based on stress corrosion cracking, characterized in that it comprises the following steps: The gas in the first high-pressure gas source bottle and the second high-pressure gas source bottle is first decompressed through the first pressure reducing valve and the second pressure reducing valve to reduce the gas pressure to a pressure value that does not damage the tooling, and then transported to the first safety valve through the third manual ball valve; Here, the gas is divided into two paths through a two-way joint. One path of gas passes through the first electric ball valve to control whether the gas can go down. If it continues to be transported, it passes through the first electric proportional valve and the second electric proportional valve to control the gas flow rate. In order to detect the parameters of the gas in the tooling, the gas passing through this path is queried through the pressure sensor for its pressure value and the gas flow meter for its current instantaneous flow rate; The other gas passes through the fourth stainless steel pipe section and the second safety valve to control whether the gas is connected. If connected, the gas is transmitted to the third electric ball valve through the second three-way valve and released when the test is completed; The gas is continuously transported, transmitted to the second electric ball valve through the third three-way valve, and then inflated to the first chamber of the tooling through the fifth stainless steel pipe section, and then transmitted to the fifth electric ball valve through the fourth three-way valve, and then inflated to the second chamber of the tooling through the sixth stainless steel pipe section, and the gas is continuously transported through the seventh stainless steel pipe section, and transmitted to the seventh electric ball valve and the eighth electric ball valve, and then inflated to the third chamber of the tooling through the seventh stainless steel pipe section; By inflating and pressurizing the three chambers of the workpiece, driving stress, and adjusting the mechanical structure of the workpiece to generate load force, the workpiece can generate extended cracks based on the original prefabricated cracks, thereby simulating the performance of the workpiece in a high-pressure environment under a nuclear radiation environment; When the experiment is completed, the gas in the high-pressure gas regulating system is released through the ninth electric ball valve.

[0039] Compared with the prior art, the present invention has the following beneficial effects: 1. The existing high-pressure gas regulating system in a nuclear radiation environment has a relatively small pressure-bearing device, and the air pressure is generally controlled by a manual ball valve. In contrast, the pressure-bearing capacity of the present invention is as high as 10MPa, and the mechanical design can fully meet the high-pressure conditions. In addition, the control method of the present invention adopts a combination of manual and automatic control, and has a good precision effect.

[0040] 2. It is not just a simple high-pressure gas regulating system. High-purity nitrogen is passed through the device, which drives stress through high pressure and adjusts the mechanical structure of the device to generate load force, thereby simulating the high-pressure environment under nuclear radiation environment and causing cracks in the sample. It can be used in conjunction with the crack detection system.

[0041] 3. Completeness of the device. A complete set of devices is provided, including: design and production of mechanical structure, specific control method of gas adjustment system and routing of stainless steel pipes, design and production of hardware circuit, software code drive and development of human-computer interaction interface, so that the device can be used as soon as gas is turned on. Universal wheels are installed on high-pressure gas cylinders and fixing devices to facilitate the movement of the device.

[0042] 4. The existing high-pressure gas conditioning system does not have the function of upper computer display. The device of the present invention can provide a concise and clear upper computer interface, and can control each sensor by controlling the upper computer, so as to achieve the purpose of remote control and reduce the risk of operators being exposed to nuclear radiation environment.

[0043] 5. High integration of hardware circuits. The existing high-pressure gas conditioning system controlled by hardware circuits has a large circuit board. The main control circuit of the device of the present invention is only 10*10cm in size, with high integration, and the power can meet the requirements of controlling 8 electric ball valves, 1 electric proportional valve, 1 gas flow meter, and 4 pressure sensors.

[0044] 6. The existing high-pressure gas regulating system generally has only one gas circuit to control the gas pressure of the device; in contrast, the device of the present invention uses gas inflation and pressure maintenance logic control, including a main circuit and an auxiliary circuit, which greatly reduces the probability of system errors.

[0045] 7. The existing high-pressure gas conditioning is generally operated in an exposed state. The device of the present invention forms a closed operating environment by manufacturing an outer box body, and heat dissipation holes are installed on both sides to achieve the purpose of heat dissipation for the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is the overall system diagram of the present invention; Figure 2 It is the overall structure diagram of the high pressure gas conditioning system device based on stress corrosion cracking; Figure 3 This is the front view of the high-pressure gas conditioning cabinet; Figure 4It is a side view of the high pressure gas conditioning cabinet; Figure 5 It is a gas cylinder fixing frame structure; Figure 6 It is the front view of the high pressure gas conditioning system; Figure 7 It is the reverse side of the high pressure gas conditioning system; Figure 8 It is the gas circuit diagram of the inflation and pressure-maintaining structure; Fig. 9 It is the schematic diagram of the electric ball valve relay unit; Fig.10 Electric ball valve interface and wiring terminals; Fig.11 It is the RS485 communication unit and wiring terminal; Fig.12 This is the schematic diagram of the RS422 communication unit; Fig.13 It is the schematic diagram of the power supply unit; Fig.14 This is the schematic diagram of the 5V module; Fig.15 This is the 3.3V module power supply circuit diagram; Fig.16 It is the development drawing of the upper computer interface.

[0047] List of reference numerals: 1. High-pressure gas source device; 11. First high-pressure gas source bottle; 12. Second high-pressure gas source bottle; 13. Gas cylinder fixing frame; 14. Universal wheel; 15. Fixing buckle; 16. Push rod; 17. Screw; 2. High-pressure gas conditioning cabinet; 21. Front sheet metal; 22. Cabinet door; 23. Fomar wheel; 24. Concealed handle; 25. Indicator light; 251. First indicator light; 252. Second indicator light; 25. Third indicator light; 26. First pressure display; 27. Second pressure display; 28. Opening; 29. ​​First connecting hole; 210. Second connecting hole; 211. Heat dissipation hole; 3. High-pressure gas conditioning system; 31. First stainless steel pipe section; 32. First pressure reducing valve; 33. Second pressure reducing valve; 34. Third stainless steel pipe section; 35. Two-way joint; 36. Third manual ball valve; 37. First safety valve; 38. First electric ball valve; 39. First electric proportional valve; 310. Second electric proportional valve Example valve, 311, gas flow meter; 312, pressure sensor; 313, fourth stainless steel pipe section; 314, first three-way valve; 315, second safety valve; 316, second three-way valve; 317, third three-way valve; 318, fourth three-way valve; 319, vent pipe; 320, second electric ball valve; 321, third electric ball valve; 322, fifth electric ball valve; 323, seventh electric ball valve; 324, fourth electric ball valve; 325, sixth electric ball valve; 326, eighth electric ball valve; 327, fifth stainless steel pipe section; 328, sixth stainless steel pipe section; 329, seventh stainless steel pipe section; 330, eighth stainless steel pipe section; 331, first pressure gauge; 332, ninth stainless steel pipe section; 333, ninth electric ball valve; 334, tenth stainless steel pipe section; 335, second pressure gauge; 336, first manual ball valve; 337, second manual ball valve; 4, connector. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: like Figure 1-16As shown, the present invention proposes a high-pressure gas conditioning system device based on stress corrosion cracking, including a high-pressure gas source device 1, a high-pressure gas conditioning cabinet 2 and a high-pressure gas conditioning system 3 installed in the high-pressure gas conditioning cabinet 2, the high-pressure gas conditioning cabinet 2 is provided with a connector 4 on the side, the high-pressure gas conditioning system 3 is connected to the workpiece through the connector 4, the high-pressure gas source device 1 includes a first high-pressure gas source bottle 11 and a second high-pressure gas source bottle 12, the high-pressure gas conditioning system 3 includes a first pressure gauge 331, a second pressure gauge 335, a first pressure reducing valve 32, a second pressure reducing valve 33, an electric ball valve, a first electric proportional valve 39, a second electric proportional valve 310, a gas flow meter 311, a first safety valve 37, a second safety valve 315, a first three-way valve 314, and a second three-way valve 316 , a third three-way valve 317 and a fourth three-way valve 318, the electric ball valve includes a first electric ball valve 38, a second electric ball valve 320, a third electric ball valve 321, a fourth electric ball valve 324, a fifth electric ball valve 322, a sixth electric ball valve 325, a seventh electric ball valve 323, an eighth electric ball valve 326 and a ninth electric ball valve 333, the first high-pressure gas source bottle 11 is provided with a first air inlet, a first air outlet and a first charging port, the second high-pressure gas source bottle 12 is provided with a second air inlet, a second air outlet and a second charging port, the first charging port and the second charging port are respectively installed with a first manual ball valve 336 and a second manual ball valve 337, the first air inlet and the second air inlet are respectively connected by a first stainless steel The pipe section 31 and the second stainless steel pipe section are connected to the first pressure reducing valve 32 and the second pressure reducing valve 33 respectively. The first pressure reducing valve 32 and the second pressure reducing valve 33 are connected to the two-way joint 35 through the third stainless steel pipe section 34. A third manual ball valve 36 and a first safety valve 37 are installed between the two-way joint 35 and the second pressure reducing valve 33. The gas in the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 is reduced in pressure through the first pressure reducing valve 32 and the second pressure reducing valve 33, and then transported to the first safety valve 37 through the third manual ball valve 36. The gas is divided into two gas paths through the two-way joint 35. One gas path passes through the first electric ball valve 38 to control whether the gas is transported downward. If it continues to be transported, the gas passes through the first electric proportional valve 39 and the second electric proportional valve 39. The proportional valve 310 controls the gas flow rate, and then passes through the gas flow meter 311 and the pressure sensor 312. The two-way joint 35 is connected to the first three-way valve 314 through the fourth stainless steel pipe section 313. The second safety valve 315 is installed on the fourth stainless steel pipe section 313. Another gas is controlled to be delivered to the first three-way valve 314 through the second safety valve 315 on the fourth stainless steel pipe section 313. The other two valves of the first three-way valve 314 are respectively connected to the second three-way valve 316 and the air release port. The other two valves of the second three-way valve 316 are respectively connected to the second electric ball valve 320 and the third three-way valve 317. The other two valves of the third three-way valve 317 are respectively connected to the fifth stainless steel pipe section 327 and the fourth three-way valve 318.The fifth stainless steel pipe section 327 is connected to the first chamber of the tooling through the connector 4, the third electric ball valve 321 and the fourth electric ball valve 324 are installed on the fifth stainless steel pipe section 327, the other two valves of the fourth three-way valve 318 are connected to the sixth stainless steel pipe section 328 and the seventh stainless steel pipe section 329 respectively, the sixth stainless steel pipe section 328 is connected to the second chamber of the tooling through the connector 4, the fifth electric ball valve 322 and the sixth electric ball valve 325 are installed on the sixth stainless steel pipe section 328, the seventh stainless steel pipe section 329 is connected to the third chamber of the tooling through the connector 4, the seventh stainless steel pipe section 329 is connected to the third chamber of the tooling through the connector 4, The seventh electric ball valve 323 and the eighth electric ball valve 326 are installed on the steel pipe section 329, the eighth stainless steel pipe section 330 is connected to the seventh stainless steel pipe section 329, the eighth stainless steel pipe section 330 is connected to the first pressure gauge 331, the eighth stainless steel pipe section 330 is connected to a vent pipe 319, the first air outlet is connected to the sixth electric ball valve 325 on the sixth stainless steel pipe section 328 through the ninth stainless steel pipe section 332, the eighth stainless steel pipe section 330 is installed with the ninth electric ball valve 333, and the second air outlet is connected to the second pressure gauge 335 through the tenth stainless steel pipe section 334.

[0049] It also includes an inflation and pressure-maintaining structure, the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are respectively used to transmit and exhaust gas through the inflation and pressure-maintaining structure, the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are used to generate gas source, and the gas source transmission is divided into two gas paths, namely the main gas path and the auxiliary gas path, the main gas path is equipped with a first main pressure detection gauge for detecting the gas pressure of the main gas path, the main gas path enters the first 3L gas storage tank after being controlled by the main manual regulating valve, the first 3L gas storage tank is equipped with a second main pressure detection gauge, and the gas in the main gas path is divided into Flow, one path of gas enters the branch through the second main manual regulating valve, and the other path of gas is controlled by the first main electric ball valve and the flow rate control valve, the flow rate control valve is connected to the pressure monitor to detect the pressure of the output gas in real time, and after the two paths of gas merge, the first main air inlet, the second main air inlet, the third main air inlet and the main air release port are formed respectively, and the first flow monitor and the second flow monitor are respectively arranged between the first main air inlet and the second main air inlet and the pressure monitor for flow monitoring, and the second main electric ball valve is arranged between the third main air inlet and the pressure monitor, and a third main electric ball valve is arranged as the main return port.

[0050] The auxiliary gas circuit enters the second 3L gas tank after being controlled by an auxiliary manual ball valve. An auxiliary pressure detection gauge is installed on the second 3L gas tank. The gas in the auxiliary gas circuit transports the high-pressure gas to the first auxiliary electric ball valve through the auxiliary safety valve and the auxiliary manual regulating valve. The first auxiliary electric ball valve serves as an auxiliary air inlet, and a second auxiliary electric ball valve is set as an auxiliary air return port.

[0051] It also includes a host computer, and the high-pressure gas regulating system 3 is connected to the host computer data to view and control the components and values ​​in the high-pressure gas regulating system 3 in real time.

[0052] The high-pressure gas source device 1 also includes a gas cylinder fixing frame 13, the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are respectively fixed to the gas cylinder fixing frame 13 through fixing buckles 15, a push rod 16 is installed above the gas cylinder fixing frame 13, and a universal wheel is installed below the gas cylinder fixing frame 13 through screws 17.

[0053] A front sheet metal 21 is installed above the high-pressure gas conditioning cabinet 2, and a pressure display is arranged on the front sheet metal 21. The pressure display includes a first pressure display 26 and a second pressure display 27. The first pressure display 26 is connected to the first pressure gauge 331 for displaying the pressure of the first high-pressure gas source bottle 11, and the second pressure display 27 is connected to the second pressure gauge 335 for displaying the pressure of the second high-pressure gas source bottle 12.

[0054] The front sheet metal 21 is also provided with indicator lights 25 , which include a first indicator light 251 for indicating that the high-pressure gas regulating system 3 is working properly, a second indicator light 252 for indicating that the electric ball valve is working properly, and a third indicator light 253 for indicating that the electric proportional valve is working properly.

[0055] A cabinet door 22 is hingedly connected to the high-pressure gas conditioning cabinet 2 , and a concealed handle 24 is arranged on the cabinet door 22 . A Fumar wheel 23 is installed at the bottom of the high-pressure gas conditioning cabinet 2 .

[0056] The side of the high-pressure gas conditioning cabinet 2 is provided with an opening 28 for observing the internal operation of the high-pressure gas conditioning cabinet 2, a first connecting hole 29 and a second connecting hole 210 for installing a gas transmission hose, and a heat dissipation hole 211 for dissipating heat from the high-pressure gas conditioning cabinet 2.

[0057] The gases in the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are both high-concentration nitrogen.

[0058] The high-pressure gas regulating system 3 also includes a power supply unit, an RS485 communication unit, an RS422 communication unit, a serial port debugging unit and an electric ball valve relay unit. The power supply unit includes a 5V power supply module and a 3.3V power supply module, which are used to power the high-pressure gas regulating system 3. The RS485 communication unit is used to enable the host computer to read data of the first electric proportional valve 39, the second electric proportional valve 310, the flow meter, the first pressure gauge 331 and the second pressure gauge 335. The RS422 communication unit is used to realize communication between the high-pressure gas regulating system 3 and the host computer. The serial port debugging unit is used for external line debugging. The electric ball valve relay unit is used to control all electric ball valves in the high-pressure gas regulating system 3.

[0059] The present invention proposes a high-pressure gas conditioning system device based on stress corrosion cracking, including a high-pressure gas source device 1, a high-pressure gas conditioning cabinet 2 and a high-pressure gas conditioning system 3 installed in the high-pressure gas conditioning cabinet 2. A connector 4 is provided on the side of the high-pressure gas conditioning cabinet 2. The high-pressure gas conditioning system 3 is connected to the workpiece through the connector 4. The high-pressure gas source device 1 includes a first high-pressure gas source bottle 11 and a second high-pressure gas source bottle 12. The first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are used to generate a gas source. The high-pressure gas source device 1 is connected to the high-pressure gas conditioning system 3 through a pressure reducing valve and a stainless steel pipe section. The gas cylinder capacity of the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 is 40L. During the test, the cabinet door 22 needs to be closed to ensure the safety of the operator. The gas generated by the high-pressure gas conditioning system 3 is connected to the external tooling through the connector 4 for inflation and deflation. The high-pressure gas source bottle and the high-pressure gas conditioning cabinet 2 should not be placed too close, otherwise it may affect the gas flow rate and the working state of the pressure reducing valve.

[0060] The working principle of the high pressure gas conditioning system 3 is as follows: The gas in the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 is first decompressed by the first pressure reducing valve 32 and the second pressure reducing valve 33 to reduce the gas pressure to a pressure value that does not damage the tooling, and then transported to the first safety valve 37 through the third manual ball valve 36; Here, the gas is divided into two paths through the two-way connector 35. One path of gas passes through the first electric ball valve 38 to control whether the gas can go down. If it continues to be transported, it passes through the first electric proportional valve 39 and the second electric proportional valve 310 to control the gas flow rate. In order to detect the parameters of the gas in the tooling, the gas passing through this path is queried for its pressure value through the pressure sensor 312 and its current instantaneous flow through the gas flow meter 311; The other gas is passed through the fourth stainless steel pipe section 313 and the second safety valve 315 to control whether the gas is connected. If connected, the gas is then transmitted to the third electric ball valve 321 through the second three-way valve 316 and released when the test is completed. The gas is continuously transported, and is transmitted to the second electric ball valve 320 through the third three-way valve 317, and then inflates the first chamber of the tooling through the fifth stainless steel pipe section 327, and is transmitted to the fifth electric ball valve 322 through the fourth three-way valve 318, and then inflates the second chamber of the tooling through the sixth stainless steel pipe section 328. The gas is continuously transported through the seventh stainless steel pipe section 329, and is transmitted to the seventh electric ball valve 323 and the eighth electric ball valve 326, and then inflates the third chamber of the tooling through the seventh stainless steel pipe section 329. By inflating and pressurizing the three chambers of the workpiece, driving stress, and adjusting the mechanical structure of the workpiece to generate load force, the workpiece can generate extended cracks based on the original prefabricated cracks, thereby simulating the performance of the workpiece in a high-pressure environment under a nuclear radiation environment; When the experiment is finished, the gas in the high-pressure gas regulating system 3 is released through the ninth electric ball valve 333 .

[0061] The control logic of the inflation and pressure-maintaining gas circuit of the high-pressure gas regulating system 3 is as follows: In the process of controlling gas, it is mainly divided into two gas paths.

[0062] One is the main gas line. The gas pressure of the gas source is displayed by the first main pressure detection gauge, and enters the first 3L gas tank through the main manual pressure regulating valve. At the same time, its pressure is displayed by the second main pressure monitoring gauge, and passes through the main safety valve and the first main manual regulating valve to prevent the gas flow rate from being unable to be controlled when the electric valve fails. After passing through the first main manual regulating valve, the gas is divided into two routes. One route passes through the second main manual regulating valve to enter the branch, and the other route must first pass through the flow rate control valve for pressure monitoring; after the two routes of gas meet, they are divided into four routes: one route is discharged through the pipeline, one route enters the first main air inlet through the first flow monitor to ventilate the first chamber, one route enters the second main air inlet through the second flow monitor to ventilate the second chamber, and the last route is controlled by the second main electric ball valve and enters the third main air inlet. In the main gas line, there is also a separate third main electric ball valve as the main return port.

[0063] Another auxiliary gas line, through the auxiliary manual pressure regulating valve, also enters the second 3L gas tank of 3L, and then passes through the auxiliary safety valve and the auxiliary manual regulating valve to deliver the gas to the first auxiliary electric ball valve, which serves as the auxiliary air inlet. Similar to the main gas line, there is a second auxiliary electric ball valve as the auxiliary air return port.

[0064] The position and name of each sensor are marked in the host computer, BV: electric ball valve, EPV: electric proportional valve, PG: pressure gauge, GFM: gas flow meter 311; you can also see the information of each sensor. The value of the pressure gauge can be displayed in the PG box, and the value of each pressure sensor 312 can be displayed on: PG1, PG2, PG3, PG4, PG5 respectively, in units of Pa; the value of the gas flow meter 311 can be displayed in the GFM1 box, in units of SCCM; the valve opening of the electric proportional valve is controlled in the EPV box, the left side is the current ratio setting, and the right side is the current real-time opening; the opening and closing of the electric ball valve can be controlled in the BV1 box.

[0065] The first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 are fixed to the gas bottle fixing frame 13 by fixing buckles 15 respectively. When used by staff, they are convenient to use because universal wheels are installed underneath and they can be pushed by the push rod 16.

[0066] The first pressure display 26 installed on the front sheet metal 21 is used to display the pressure of the first high-pressure gas source bottle 11, and the second pressure display 27 is used to display the pressure of the second high-pressure gas source bottle 12, so as to facilitate real-time viewing of the gas in the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12, and timely opening of the two gas source bottles to ensure that the gas pressure in the device reaches a stable and controllable range, which is convenient for staff to check.

[0067] The front sheet metal 21 is also provided with an indicator light 25, which can inform the user of the working status and fault status of the device. The indicator light 25 includes a first indicator light 251 for indicating that the high-pressure gas regulating system 3 is working normally, a second indicator light 252 for indicating that the electric ball valve is working normally, and a third indicator light 253 for indicating that the electric proportional valve is working normally. The first indicator light 251 is on, indicating that the system power supply is normal and the program is running normally, and the first indicator light 251 is off, indicating that the system power supply is abnormal; the second indicator light 252 is on, indicating that the electric ball valve control is normal, and the second indicator light 252 is off, indicating that there is a fault in the control of the electric ball valve; the third indicator light 253 is on, indicating that the electric proportional valve control is normal, and the third indicator light 253 is off, indicating that there is a fault in the control of the electric proportional valve.

[0068] The pressure regulating gas cabinet controls the switch of the 840*540*1240mm cabinet door 22 through the 100*40mm concealed handle 24. The distance between the two concealed handles 24 is 100.5mm. The 980*730mm cabinet door 22 is equipped with hinges or latches, and the inner side of the door is magnetically attracted. The distance between the concealed handle 24 and the cabinet door 22 is 385mm. The high-pressure gas regulating cabinet 2 can be dragged by the four Fuma wheels 23 installed at the bottom, and has high flexibility.

[0069] The opening 28 with a size of 200*100cm and a chamfer of 10mm is 50mm away from the side edge and 50mm away from the top edge in order to facilitate observation of the operation status inside the tooling; the heat dissipation hole 211 below is for the high-pressure gas conditioning cabinet 2 to dissipate heat better and not accumulate heat. The first connecting hole 29 and the second connecting hole 210 are 320mm apart in center distance, the center of the circle is 110mm away from the lower plate, and the center size is 110mm.

[0070] On the other side of the high-pressure gas conditioning cabinet 2, there is no round hole connected to the tooling. In order to better observe the internal operation of the high-pressure gas conditioning system 3, an opening 28 with a size of 200*100 and a chamfer of 10 mm is still opened.

[0071] Behind the high-pressure gas conditioning system 3 , there is a rear cabinet door 22 of 980*730 mm, which has the same specifications as the cabinet door 22 , and there is a back sheet metal of 730*230 mm, which has the same specifications as the front sheet metal 21 .

[0072] The high-pressure gas conditioning system 3 also includes a power supply unit, an RS485 communication unit, an RS422 communication unit, a serial port debugging unit and an electric ball valve relay unit.

[0073] Among them, the electric ball valve relay unit is a unit for controlling the electric ball valve. In the control logic of the electric ball valve, taking a single electric ball valve as an example, the on and off of the electric ball valve is controlled by the high and low levels of the IO port PC8 of the single-chip microcomputer. When PC8 is at a low level, the transistor 9013 is turned on, so that the relay is in a normally open state and the electric ball valve is opened, otherwise the electric ball valve is closed. It is only necessary to connect the open valve, close valve and common end of the electric ball valve to the OPEN_PWR, CLOSE_PWR and COM of the relay respectively, and the on and off of the electric ball valve can be controlled by controlling the high and low levels of the IO port PC8 of the single-chip microcomputer.

[0074] The RS485 communication unit is used to realize the upper computer to read the data of the first electric proportional valve 39, the second electric proportional valve 310, the flow meter, the first pressure gauge 331 and the second pressure gauge 335. The RS485 communication unit uses the MAX13487 chip to convert the TTL level to the RS485 level. The MAX13487 is a +5V powered, half-duplex, ±15kV ESD protected RS-485 / RS-422 compatible transceiver, which includes one driver and one receiver, and has a hot-swap function, which can eliminate the fault transient signal on the bus during power-on or hot insertion. It is a hardware interface derived from RS485, a 4-pin interface, which leads to A2, B2, 24V power supply and GND. The 24V power supply and GND are to be able to power the RS485 sensor. The RS485 sensors include: electric proportional valves, flow meters and pressure gauges, all of which complete the data reading work through RS485 communication.

[0075] The RS422 communication unit is used to realize the communication between the high-pressure gas conditioning system 3 and the host computer. By converting the TTL level of the serial port into the RS422 level, the MAX488CSA chip is used, and the data rate is as high as 250kbps. The integrated protection improves the reliability of the system. The output end is protected by R514, R515, R516, and R517, and the resistance is 10 ohms. In the MAX488CSA chip, two capacitors, one large and one small, are connected in series between the power supply and the ground for filtering, which are 10uF and 100nF respectively.

[0076] In this high-pressure gas regulating system 3, a 36V input voltage is used for power supply, and the output voltage is 24V. During the test, it is necessary to detect whether the output voltage can reach 24V to verify the function and stability of the power module. This 24V power supply is used to power the gas flow meter 311, the pressure gauge and the electric ball valve. The hardware system of this high-pressure gas regulating system 3 also needs to power the relay and the single-chip microcomputer main control. The TPS5450 chip is used, a high-output current PWM converter, which integrates a low-resistance high-side N-channel MOSFET. According to the calculation:

[0077] Use TD1509-5V to step down the 24V voltage to 5V, connect five capacitors in series between the power supply and the ground, all of which are 100uF, and connect a light-emitting diode and a resistor in series between 5V and GND. When the light-emitting diode lights up, it means that the 5V power supply is working normally.

[0078] Use LD1117-3.3V to step down the 5V voltage to 3.3V. At the input end, use C412: 10uF and C413: 100nF to filter out the front-end noise. At the output end, use three 10uF / 16V capacitors and two 100nF capacitors to filter out the noise.

[0079] The serial port debugging unit is used for external line debugging.

[0080] A control method for a high-pressure gas conditioning system device based on stress corrosion cracking comprises the following steps: The gas in the first high-pressure gas source bottle 11 and the second high-pressure gas source bottle 12 is first decompressed by the first pressure reducing valve 32 and the second pressure reducing valve 33 to reduce the gas pressure to a pressure value that does not damage the tooling, and then transported to the first safety valve 37 through the third manual ball valve 36; Here, the gas is divided into two paths through the two-way connector 35. One path of gas passes through the first electric ball valve 38 to control whether the gas can go down. If it continues to be transported, it passes through the first electric proportional valve 39 and the second electric proportional valve 310 to control the gas flow rate. In order to detect the parameters of the gas in the tooling, the gas passing through this path is queried for its pressure value through the pressure sensor 312 and its current instantaneous flow through the gas flow meter 311; The other gas is passed through the fourth stainless steel pipe section 313 and the second safety valve 315 to control whether the gas is connected. If connected, the gas is then transmitted to the third electric ball valve 321 through the second three-way valve 316 and released when the test is completed. The gas is continuously transported, and is transmitted to the second electric ball valve 320 through the third three-way valve 317, and then inflates the first chamber of the tooling through the fifth stainless steel pipe section 327, and is transmitted to the fifth electric ball valve 322 through the fourth three-way valve 318, and then inflates the second chamber of the tooling through the sixth stainless steel pipe section 328. The gas is continuously transported through the seventh stainless steel pipe section 329, and is transmitted to the seventh electric ball valve 323 and the eighth electric ball valve 326, and then inflates the third chamber of the tooling through the seventh stainless steel pipe section 329. By inflating and pressurizing the three chambers of the workpiece, driving stress, and adjusting the mechanical structure of the workpiece to generate load force, the workpiece can generate extended cracks based on the original prefabricated cracks, thereby simulating the performance of the workpiece in a high-pressure environment under a nuclear radiation environment; When the experiment is finished, the gas in the high-pressure gas regulating system 3 is released through the ninth electric ball valve 333 .

[0081] The beneficial effects of the present invention are as follows: 1. The existing high-pressure gas regulating system in a nuclear radiation environment has a relatively small pressure-bearing device, and the air pressure is generally controlled by a manual ball valve. In contrast, the pressure-bearing capacity of the present invention is as high as 10MPa, and the mechanical design can fully meet the high-pressure conditions. In addition, the control method of the present invention adopts a combination of manual and automatic control, and has a good precision effect.

[0082] 2. It is not just a simple high-pressure gas regulating system. High-purity nitrogen is passed through the device, which drives stress through high pressure and adjusts the mechanical structure of the device to generate load force, thereby simulating the high-pressure environment under nuclear radiation environment and causing cracks in the sample. It can be used in conjunction with the crack detection system.

[0083] 3. Completeness of the device. A complete set of devices is provided, including: design and production of mechanical structure, specific control method of gas adjustment system and routing of stainless steel pipes, design and production of hardware circuit, software code drive and development of human-computer interaction interface, so that the device can be used as soon as gas is turned on. Universal wheels are installed on high-pressure gas cylinders and fixing devices to facilitate the movement of the device.

[0084] 4. The existing high-pressure gas conditioning system does not have the function of upper computer display. The device of the present invention can provide a concise and clear upper computer interface, and can control each sensor by controlling the upper computer, so as to achieve the purpose of remote control and reduce the risk of operators being exposed to nuclear radiation environment.

[0085] 5. High integration of hardware circuits. The existing high-pressure gas conditioning system controlled by hardware circuits has a large circuit board. The main control circuit of the device of the present invention is only 10*10cm in size, with high integration, and the power can meet the requirements of controlling 8 electric ball valves, 1 electric proportional valve, 1 gas flow meter, and 4 pressure sensors.

[0086] 6. The existing high-pressure gas regulating system generally has only one gas circuit to control the gas pressure of the device; in contrast, the device of the present invention uses gas inflation and pressure maintenance logic control, including a main circuit and an auxiliary circuit, which greatly reduces the probability of system errors.

[0087] 7. The existing high-pressure gas conditioning is generally operated in an exposed state. The device of the present invention forms a closed operating environment by manufacturing an outer box body, and heat dissipation holes are installed on both sides to achieve the purpose of heat dissipation for the device.

[0088] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A high-pressure gas conditioning system device based on stress corrosion cracking, characterized in that: The invention comprises a high-pressure gas source device (1), a high-pressure gas regulating cabinet (2), and a high-pressure gas regulating system (3) installed in the high-pressure gas regulating cabinet (2); a connector (4) is arranged on the side of the high-pressure gas regulating cabinet (2); the high-pressure gas regulating system (3) is connected to a workpiece via the connector (4); the high-pressure gas source device (1) comprises a first high-pressure gas source bottle (11) and a second high-pressure gas source bottle (12); the high-pressure gas regulating system (3) comprises a first pressure gauge (331), a second pressure gauge (335), a first pressure reducing valve (32), a second pressure reducing valve (33), an electric ball valve, a first electric proportional valve (39), a second electric proportional valve (310), a gas flow meter (311), a first safety valve (37), a second safety valve (315), a first A three-way valve (314), a second three-way valve (316), a third three-way valve (317) and a fourth three-way valve (318), the electric ball valve comprising a first electric ball valve (38), a second electric ball valve (320), a third electric ball valve (321), a fourth electric ball valve (324), a fifth electric ball valve (322), a sixth electric ball valve (325), a seventh electric ball valve (323), an eighth electric ball valve (326) and a ninth electric ball valve (333), the first high-pressure gas source bottle (11) being provided with a first air inlet, a first air outlet and a first charging port, the second high-pressure gas source bottle (12) being provided with a second air inlet, a second air outlet and a second charging port, the first charging port and the second charging port being provided with a first air inlet and a second air outlet, respectively. A first manual ball valve (336) and a second manual ball valve (337) should be installed. The first air inlet and the second air inlet are respectively connected to the first pressure reducing valve (32) and the second pressure reducing valve (33) through the first stainless steel pipe section (31) and the second stainless steel pipe section. The first pressure reducing valve (32) and the second pressure reducing valve (33) are connected to the two-way joint (35) through the third stainless steel pipe section (34). A third manual ball valve (36) and a first safety valve (37) are installed between the two-way joint (35) and the second pressure reducing valve (33). The gas in the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) is reduced in pressure through the first pressure reducing valve (32) and the second pressure reducing valve (33), and then transported through the third manual ball valve (36). To the first safety valve (37), the gas is divided into two paths through the two-way joint (35). One path of gas passes through the first electric ball valve (38) to control whether the gas is transported downward. If the gas continues to be transported, the gas passes through the first electric proportional valve (39) and the second electric proportional valve (310) to control the gas flow rate, and then passes through the gas flow meter (311) and the pressure sensor (312). The two-way joint (35) is connected to the first three-way valve (314) through the fourth stainless steel pipe section (313), and the second safety valve (315) is installed on the fourth stainless steel pipe section (313). The other path of gas is controlled by the second safety valve (315) on the fourth stainless steel pipe section (313) to be transported to the first three-way valve (314).The other two valves of the first three-way valve (314) are connected to the second three-way valve (316) and the air release port respectively; the other two valves of the second three-way valve (316) are connected to the second electric ball valve (320) and the third three-way valve (317) respectively; the other two valves of the third three-way valve (317) are connected to the fifth stainless steel pipe section (327) and the fourth three-way valve (318) respectively; the fifth stainless steel pipe section (327) is connected to the first chamber of the tooling through the connector (4); the third electric ball valve (321) and the fourth electric ball valve (324) are installed on the fifth stainless steel pipe section (327); the other two valves of the fourth three-way valve (318) are connected to the sixth stainless steel pipe section (328) and the seventh stainless steel pipe section (329) respectively; the sixth stainless steel pipe section (328) is connected to the second chamber of the tooling through the connector (4); the sixth stainless steel pipe section (328) is installed on the A fifth electric ball valve (322) and a sixth electric ball valve (325) are installed, the seventh stainless steel pipe section (329) is connected to the third chamber of the tooling through a connector (4), the seventh stainless steel pipe section (329) is installed with a seventh electric ball valve (323) and an eighth electric ball valve (326), the seventh stainless steel pipe section (329) is connected with an eighth stainless steel pipe section (330), the eighth stainless steel pipe section (330) is connected with a first pressure gauge (331), the eighth stainless steel pipe section (330) is connected with a venting pipe (319), the first air outlet is connected to the sixth electric ball valve (325) on the sixth stainless steel pipe section (328) through a ninth stainless steel pipe section (332), the eighth stainless steel pipe section (330) is installed with a ninth electric ball valve (333), the second air outlet is connected to a second pressure gauge (335) through a tenth stainless steel pipe section (334), The invention also comprises an inflation pressure maintaining structure, wherein the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) are used to transmit and exhaust gas respectively through the inflation pressure maintaining structure, the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) are used to generate gas source, and the gas source transmission is divided into two gas paths, namely a main gas path and an auxiliary gas path, a first main pressure detection gauge is installed on the main gas path, and is used to detect the gas pressure of the main gas path, the main gas path enters the first 3L gas storage tank after being controlled by the main manual regulating valve, the first 3L gas storage tank is installed with a second main pressure detection gauge, and the gas in the main gas path is discharged through the main safety valve and the first main manual regulating valve. It performs flow diversion, one gas path enters the branch path through the second main manual regulating valve, and the other gas path is controlled by the first main electric ball valve and the flow rate control valve. The flow rate control valve is connected to the pressure monitor to detect the pressure of the output gas in real time. After the two gas paths merge, the first main air inlet, the second main air inlet, the third main air inlet and the main air release port are formed respectively. The first flow monitor and the second flow monitor are respectively arranged between the first main air inlet and the second main air inlet and the pressure monitor for flow monitoring. The second main electric ball valve is arranged between the third main air inlet and the pressure monitor, and a third main electric ball valve is arranged as the main air return port; The auxiliary gas circuit enters the second 3L gas tank after being controlled by an auxiliary manual ball valve. An auxiliary pressure detection gauge is installed on the second 3L gas tank. The gas in the auxiliary gas circuit transports the high-pressure gas to the first auxiliary electric ball valve through the auxiliary safety valve and the auxiliary manual regulating valve. The first auxiliary electric ball valve serves as an auxiliary air inlet, and a second auxiliary electric ball valve is set as an auxiliary air return port.

2. It also includes a host computer, and the high-pressure gas regulating system (3) is connected to the host computer data to view and control the components and values ​​in the high-pressure gas regulating system (3) in real time.

3. A high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: The high-pressure gas source device (1) also includes a gas cylinder fixing frame (13), wherein the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) are respectively fixed to the gas cylinder fixing frame (13) via fixing buckles (15), a push rod (16) is installed above the gas cylinder fixing frame (13), and a universal wheel (14) is installed below the gas cylinder fixing frame (13) via screws (17).

4. A high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: A front sheet metal (21) is installed above the high-pressure gas conditioning cabinet (2), and a pressure display is arranged on the front sheet metal (21). The pressure display comprises a first pressure display (26) and a second pressure display (27). The first pressure display (26) is connected to a first pressure gauge (331) and is used to display the pressure of a first high-pressure gas source bottle (11). The second pressure display (27) is connected to a second pressure gauge (335) and is used to display the pressure of a second high-pressure gas source bottle (12).

5. A high pressure gas conditioning system device based on stress corrosion cracking according to claim 3, characterized in that: The front sheet metal (21) is also provided with indicator lights (25), the indicator lights (25) comprising a first indicator light (251) for indicating that the high-pressure gas regulating system (3) is working normally, a second indicator light (252) for indicating that the electric ball valve is working normally, and a third indicator light (25) for indicating that the electric proportional valve is working normally.

6. A high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: The high-pressure gas conditioning cabinet (2) is hingedly provided with a cabinet door (22), the cabinet door (22) is provided with a concealed handle (24), and a Fumar wheel (23) is installed at the bottom of the high-pressure gas conditioning cabinet (2).

7. A high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: The side of the high-pressure gas conditioning cabinet (2) is provided with an opening (28) for observing the internal operation of the high-pressure gas conditioning cabinet (2), a first connection hole (29) and a second connection hole (210) for installing a gas transmission hose, and a heat dissipation hole (211) for dissipating heat from the high-pressure gas conditioning cabinet (2).

8. The high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: The gases in the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) are both high-concentration nitrogen.

9. The high pressure gas conditioning system device based on stress corrosion cracking according to claim 1, characterized in that: The high-pressure gas regulating system (3) further comprises a power supply unit, an RS485 communication unit, an RS422 communication unit, a serial port debugging unit and an electric ball valve relay unit. The power supply unit comprises a 5V power supply module and a 3.3V power supply module, and is used to supply power to the high-pressure gas regulating system (3). The RS485 communication unit is used to enable the host computer to read data of the first electric proportional valve (39), the second electric proportional valve (310), the flow meter, the first pressure gauge (331) and the second pressure gauge (335). The RS422 communication unit is used to enable communication between the high-pressure gas regulating system (3) and the host computer. The serial port debugging unit is used for external line debugging. The electric ball valve relay unit is used to control all electric ball valves in the high-pressure gas regulating system (3).

10. A control method for a high pressure gas conditioning system device based on stress corrosion cracking according to any one of claims 1 to 8, characterized in that: The steps include: The gas in the first high-pressure gas source bottle (11) and the second high-pressure gas source bottle (12) is firstly decompressed through the first pressure reducing valve (32) and the second pressure reducing valve (33) to reduce the gas pressure to a pressure value that does not damage the tooling, and then is transported to the first safety valve (37) through the third manual ball valve (36); Here, the gas is divided into two paths through a two-way joint (35). One path of gas passes through a first electric ball valve (38) to control whether the gas can flow downward. If the gas continues to be transported, it passes through a first electric proportional valve (39) and a second electric proportional valve (310) to control the gas flow rate. In order to detect the parameters of the gas in the tooling, the gas passing through this path is queried for its pressure value through a pressure sensor (312) and its current instantaneous flow rate through a gas flow meter (311); Another gas path passes through the fourth stainless steel pipe section (313) and the second safety valve (315) to control whether the gas is connected. If connected, the gas is then transmitted to the third electric ball valve (321) through the second three-way valve (316) and released when the test is completed; The gas is continuously transported, transmitted to the second electric ball valve (320) through the third three-way valve (317), and then inflated to the first chamber of the tooling through the fifth stainless steel pipe section (327), and then transmitted to the fifth electric ball valve (322) through the fourth three-way valve (318), and then inflated to the second chamber of the tooling through the sixth stainless steel pipe section (328), and the gas is continuously transported through the seventh stainless steel pipe section (329), and then transmitted to the seventh electric ball valve (323) and the eighth electric ball valve (326), and then inflated to the third chamber of the tooling through the seventh stainless steel pipe section (329); By inflating and pressurizing the three chambers of the workpiece, driving stress, and adjusting the mechanical structure of the workpiece to generate load force, the workpiece can generate extended cracks based on the original prefabricated cracks, thereby simulating the performance of the workpiece in a high-pressure environment under a nuclear radiation environment; When the experiment is completed, the gas in the high-pressure gas regulating system (3) is released through the ninth electric ball valve (333).

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