A standard atmospheric pressure gas supply device and method for high-altitude areas

Abstract

This application relates to a standard atmospheric pressure gas supply device and method for high-altitude areas, specifically within the technical field of petroleum auxiliary testing equipment. The gas supply device includes a high-pressure blower and a volumetric pressure tank, which are interconnected. A first pressure stabilizing device is installed between the high-pressure blower and the volumetric pressure tank. The first pressure stabilizing device includes a variable frequency drive (VFD), a first pressure sensor, and a first controller. The first controller is electrically connected to both the VFD and the first pressure sensor. The first pressure sensor is mounted on the volumetric pressure tank, and the VFD is electrically connected to the high-pressure blower. This application uses the first pressure sensor to detect the gas pressure inside the volumetric pressure tank in real time. Based on the detection results, the VFD is adjusted to control the high-pressure blower, thereby regulating the gas pressure inside the volumetric pressure tank and maintaining it at one atmosphere, thus creating a standard atmospheric pressure environment.

Description

Technical Field

[0001] This application relates to the technical field of petroleum auxiliary testing equipment, and in particular to a standard atmospheric pressure gas supply device and method for high-altitude areas. Background Technology

[0002] Oil product testing is an important part of petrochemical production. It is not only a crucial guarantee for the overall quality and safety of oil products, but also a fundamental measure for environmental protection and prevention, especially given the increasingly serious problem of air pollution. Therefore, it is of great significance to carry out oil product testing work in strict accordance with the requirements.

[0003] Petroleum testing is conducted under normal atmospheric pressure. If you go to a plateau or other high-altitude area, you need to control the pressure of the testing environment to normal atmospheric pressure so that the test data can be normal.

[0004] Currently, some testing equipment used in high-altitude areas encounters situations where the atmospheric pressure environment is not up to standard, such as during combustion or cooking processes. This is related to the air content and pressure at high altitudes. The higher the altitude, the lower the atmospheric pressure and the lower the air content. Therefore, some testing equipment used in high-altitude areas cannot perform tests according to the standards used in plains areas.

[0005] Currently, separate testing equipment is often set up specifically for use in high-altitude areas, but this undoubtedly increases testing costs. Some testing equipment is equipped with a booster pump at the factory to pressurize the equipment and bring it to standard atmospheric pressure in order to adapt to high-altitude environments. However, it is difficult to maintain a stable air pressure with just one pump, and air pressure fluctuations during the test can easily lead to large errors in the test results. Summary of the Invention

[0006] This application provides a standard atmospheric pressure gas supply device and method for high-altitude areas, the purpose of which is to create a stable standard atmospheric pressure environment in high-altitude areas.

[0007] Firstly, the technical solution adopted in this application for a standard atmospheric pressure gas supply device for high-altitude areas is as follows:

[0008] A standard atmospheric pressure gas supply device for high-altitude areas includes a high-pressure blower and a volumetric pressure tank. The high-pressure blower and the volumetric pressure tank are interconnected, and a first pressure stabilizing device is provided between the high-pressure blower and the volumetric pressure tank. The first pressure stabilizing device includes a variable frequency drive, a first pressure sensor, and a first controller. The first controller is electrically connected to the variable frequency drive and the first pressure sensor, respectively. The first pressure sensor is installed on the volumetric pressure tank, and the variable frequency drive is electrically connected to the high-pressure blower.

[0009] By adopting the above technical solution, the high-pressure blower can deliver air into the volumetric pressure tank, thereby increasing the air pressure inside the tank. The first pressure sensor in the first pressure stabilizing device detects the air pressure inside the volumetric pressure tank in real time and adjusts the control value of the variable frequency drive accordingly based on the detection result, thereby controlling the high-pressure blower and regulating the air pressure inside the volumetric pressure tank to maintain it at one atmosphere.

[0010] Therefore, the first pressure stabilizing device can stabilize the air pressure output from the volumetric pressure tank at one atmosphere, thereby creating a standard atmospheric pressure environment in high-altitude areas.

[0011] Optionally, the first pressure stabilizing device further includes a pressure relief valve, which is connected to the volumetric pressure tank.

[0012] By adopting the above technical solution, since the air supply and discharge pressure of the high-pressure blower has non-linear characteristics, a pressure relief valve is set up. When the high-pressure blower delivers a small flow of air to the volumetric pressure tank, the blowing intensity of the high-pressure blower can be increased. The pressure relief valve is opened to assist in control, reduce the adjustment range of the high-pressure blower, and make the air pressure easier to control and stabilize.

[0013] Optionally, the pressure relief valve is electrically connected to the first controller.

[0014] By adopting the above technical solution, the pressure relief valve is electrically connected to the first controller. The control value of the variable frequency speed controller is adjusted according to the detection result of the first pressure sensor, and the opening status of the pressure relief valve is adjusted accordingly, thereby realizing fully automatic control of the air pressure in the volumetric pressure tank.

[0015] Secondly, the standard atmospheric pressure gas supply method for high-altitude areas provided in this application adopts the following technical solution:

[0016] A method for supplying standard atmospheric pressure gas in high-altitude areas, utilizing the aforementioned high-altitude standard atmospheric pressure gas supply equipment, includes the following steps:

[0017] S1: Preset the parameters of the variable frequency drive: Set two control values ​​for the variable frequency drive, one control value is the lower limit value for opening the pressure relief valve, and the other is the upper limit value for closing the pressure relief valve;

[0018] S2: Start the high-pressure blower;

[0019] S3: Preliminary adjustment: Adjust the control value of the variable frequency drive to the corresponding value according to the air pressure in the volumetric pressure tank.

[0020] S4: Cyclic regulation;

[0021] S41: When the control value of the variable frequency drive is higher than the lower limit of the pressure relief valve opening, the pressure relief valve is closed, the high-pressure blower remains on, and the control value of the variable frequency drive is adjusted according to the air pressure in the volumetric pressure tank.

[0022] S42: When the control value of the variable frequency drive is lower than the lower limit of the pressure relief valve opening, both the pressure relief valve and the high-pressure blower are opened, and the control value of the variable frequency drive is adjusted according to the air pressure in the volumetric pressure tank.

[0023] S43: When the control value of the variable frequency drive is higher than the upper limit of the pressure relief valve, the pressure relief valve is closed, the high-pressure blower remains on, and the control value of the variable frequency drive is adjusted according to the air pressure in the volumetric pressure tank.

[0024] S44: Repeat steps S41 to S43.

[0025] By adopting the above technical solution, step S1 combines the control values ​​of the frequency converter with the opening and closing of the pressure relief valve, ensuring that the pressure relief valve can promptly connect or disconnect from the volumetric pressure tank. Steps S2 and S3 enable rapid pressurization of the internal gas in the volumetric pressure tank under initial conditions.

[0026] In step S4, during step S41, as the internal pressure of the volumetric pressure tank initially increases, the control value of the frequency converter gradually decreases. When the control value of the frequency converter drops below the lower limit of the pressure relief valve opening, the high-pressure blower achieves a small flow rate of air delivery.

[0027] In step S42, controlling the low-flow air delivery of the high-pressure blower is difficult and unstable. Therefore, the control value of the variable frequency drive needs to be increased from its low value. This requires the pressure relief valve to open. After the pressure relief valve starts working, the high-pressure blower needs to compensate for the exhaust from the valve, so the blower needs to increase its blowing intensity, allowing the control value of the variable frequency drive to rise.

[0028] In step S43, while the pressure relief valve is in operation, the control value of the frequency converter increases. When the high-pressure blower is in normal working condition, the pressure relief valve becomes ineffective, and the high-pressure blower alone can maintain a stable pressure of one atmosphere. At this moment, the control value of the frequency converter is higher than the upper limit for closing the pressure relief valve, thus closing the valve.

[0029] Step S44 involves continuously repeating steps S41-S43 above to ensure that the air pressure inside the volumetric pressure tank is maintained at one atmosphere.

[0030] Through the above steps S1-S4, low-pressure air is compressed into high-pressure air by a high-pressure blower. In order to make the air pressure reach and stabilize at a standard atmospheric pressure, the air pressure is detected in real time by the first sensor, and the control value of the variable frequency speed controller is adjusted in a timely manner according to the detection result to change the speed of the high-pressure blower, thereby directly realizing the transformation of air pressure from low pressure to standard atmospheric pressure.

[0031] To ensure air pressure stability under all circumstances, a pressure relief valve is added to control the air supply pressure of the high-pressure blower, taking into account the nonlinear characteristics of the high-pressure blower's air supply pressure. The control value of the variable frequency drive is used as the condition for opening and closing the pressure relief valve. When the volumetric pressure tank has a small air supply demand, the blowing intensity of the high-pressure blower can be increased, the pressure relief valve can be opened, the adjustment range of the high-pressure blower can be reduced, and the air pressure can be more easily controlled and stabilized.

[0032] Optionally, step S42 further includes: when the control value of the variable frequency drive is lower than the lower limit of the pressure relief valve opening, setting the control value of the variable frequency drive at this time to the lower limit that the control value of the variable frequency drive can be adjusted.

[0033] By adopting the above technical solution, when the control value of the variable frequency drive is lower than the lower limit of the pressure relief valve opening, it means that the pressure relief valve needs to be opened. This also means that the control value of the variable frequency drive is too low, causing the high-pressure blower to be in a low-flow air supply state. In order to improve this state, the pressure relief valve needs to be opened. Therefore, setting the control value of the variable frequency drive to the lower limit that the control value of the variable frequency drive can adjust can prevent the control value of the variable frequency drive from continuing to drop, causing the high-pressure blower to enter a more unstable low-flow air supply state.

[0034] Optionally, step S42 further includes: when the pressure inside the volumetric pressure tank reaches one atmosphere, stopping the adjustment of the pressure relief valve, and adjusting the control value of the variable frequency drive according to the air pressure inside the volumetric pressure tank.

[0035] By adopting the above technical solution, after the air pressure in the volumetric pressure tank can be stabilized at one atmosphere, the pressure relief valve and high-pressure blower can maintain a relatively stable air pressure. At this time, it is necessary to maintain a stable air pressure.

[0036] Optionally, step S43 further includes: slowly closing the pressure relief valve until the pressure relief valve is completely closed.

[0037] By adopting the above technical solution, the pressure relief valve needs to be closed slowly to prevent a sudden increase in air pressure inside the volumetric pressure tank.

[0038] Optionally, when the pressure relief valve is slowly closed, the control value of the variable frequency drive is adjusted according to the air pressure in the volumetric pressure tank.

[0039] By adopting the above technical solution, the pressure relief valve is slowly closed while the frequency converter is adjusted to ensure that the air pressure in the volumetric pressure tank remains stable during the process of closing the pressure relief valve.

[0040] Thirdly, the standard atmospheric pressure gas supply equipment for high-altitude areas provided in this application adopts the following technical solution:

[0041] A standard atmospheric pressure air supply device for high-altitude areas includes an air compressor, an atmospheric pressure air supply tank, a high-pressure air tank, and a second pressure stabilizing device. The air compressor and the high-pressure air tank are interconnected. The second pressure stabilizing device includes an actuator valve, a second pressure sensor, and a second controller. The second controller and the second pressure sensor are interconnected. The actuator valve is interconnected with the high-pressure air tank and the atmospheric pressure air supply tank at both ends. The second pressure sensor is installed on the atmospheric pressure air supply tank.

[0042] By adopting the above technical solution, this application intermittently pressurizes air to 5 to 7 atmospheres using an air compressor, and then the high-pressure gas can be delivered to an atmospheric pressure supply tank to achieve pressure release. During this process, a second pressure sensor can detect the air pressure in the atmospheric pressure supply tank, thereby adjusting the size of the actuator valve so that the air pressure in the atmospheric pressure supply tank can be released to a stable state maintained at one atmosphere.

[0043] Fourthly, the standard atmospheric pressure gas supply method for high-altitude areas provided in this application adopts the following technical solution:

[0044] A method for supplying standard atmospheric pressure gas in high-altitude areas, utilizing a high-altitude standard atmospheric pressure gas supply device mentioned in the third aspect above, includes the following steps:

[0045] S1: Compression: Compressing air to a state higher than standard atmospheric pressure and storing it in the high-pressure gas tank;

[0046] S2: Release: Release the high-pressure gas in the high-pressure gas tank into the atmospheric pressure gas supply tank;

[0047] S3: Adjustment: Based on the air pressure data of the atmospheric pressure supply tank, adjust the opening size of the actuator valve to maintain the air pressure in the atmospheric pressure supply tank at one atmosphere.

[0048] By adopting the above technical solution, low-pressure air is compressed to a high-pressure state, and then the high-pressure air is released, thereby reducing the air pressure to the standard atmospheric pressure. This control method is relatively easy to implement.

[0049] In summary, this application includes at least one of the following beneficial technical effects:

[0050] 1. This application uses a first pressure sensor to detect the air pressure inside the volumetric pressure tank in real time, and adjusts the control value of the frequency converter according to the air pressure detection result to control the high-pressure blower, thereby regulating the air pressure inside the volumetric pressure tank and maintaining the air pressure in the volumetric pressure tank at one atmosphere.

[0051] 2. In this application, pressure relief control is achieved through a pressure relief valve. Therefore, when the high-pressure blower delivers a small flow of air into the volumetric pressure tank, the blowing intensity of the high-pressure blower can be increased, the pressure relief valve can be opened to control the pressure relief, the adjustment range of the high-pressure blower can be reduced, and the air pressure can be more easily controlled and stabilized.

[0052] 3. This application uses a high-pressure blower to directly supply air and a frequency converter to regulate and control the air pressure, so that the air pressure can directly reach the target state of standard atmospheric pressure from a low-pressure state, which is quick to adjust and has low power consumption loss.

[0053] 4. This application intermittently pressurizes air to 5 to 7 atmospheres using an air compressor, and then continuously releases it to a standard atmosphere via an actuator valve, thus achieving a control method from low pressure to high pressure and then to standard atmosphere. This device has a simple control method, low-cost control equipment, and is not easily damaged.

[0054] 5. When the volumetric pressure tank or atmospheric pressure supply tank in the gas supply equipment of this application is connected to the testing equipment that needs to form a standard atmospheric pressure environment, the gas supply equipment can deliver gas at standard atmospheric pressure to the corresponding testing equipment and stabilize the gas pressure in the corresponding equipment at standard atmospheric pressure to meet the environmental requirements for use of the testing equipment. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0056] Figure 2 This is a control structure block diagram of Embodiment 1 of this application.

[0057] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0058] Figure 4 This is a control structure block diagram of Embodiment 2 of this application.

[0059] In the diagram, 1. High-pressure blower; 2. Volumetric pressure tank; 3. Inlet pipe; 4. First pressure stabilizing device; 41. Variable frequency drive; 42. First pressure sensor; 43. First controller; 44. Pressure relief valve; 45. Pressure relief pipe;

[0060] 10. Air compressor; 20. Atmospheric pressure air supply tank; 30. High pressure air tank; 40. High pressure pipeline; 50. Second pressure stabilizing device; 501. Actuating valve; 502. Second pressure sensor; 503. Second controller. Detailed Implementation

[0061] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0062] Example 1:

[0063] A standard atmospheric pressure gas supply device for high-altitude areas, referring to Figure 1 and Figure 2 It includes a high-pressure blower 1 and a volumetric pressure tank 2. One end of the high-pressure blower 1 is equipped with an air inlet pipe 3. The two ends of the air inlet pipe 3 are connected to the high-pressure blower 1 and the volumetric pressure tank 2 respectively. Air can be sent into the volumetric pressure tank 2 through the high-pressure blower 1 to increase the air pressure inside the volumetric pressure tank 2.

[0064] A first pressure stabilizing device 4 is provided between the volumetric pressure tank 2 and the high-pressure blower 1. The first pressure stabilizing device 4 includes a variable frequency speed controller 41. The variable frequency speed controller 41 is electrically connected to the high-pressure blower 1. The variable frequency speed controller 41 can change the speed of the high-pressure blower 1, thereby changing the air delivery volume of the high-pressure blower 1, and thus changing the air pressure rise rate in the volumetric pressure tank 2.

[0065] The first pressure stabilizing device 4 also includes a plurality of first pressure sensors 42, all of which are mounted on the volumetric pressure tank 2, and the detection units of the plurality of first pressure sensors 42 are all capable of detecting the internal air pressure of the volumetric pressure tank 2, thereby obtaining the air pressure inside the volumetric pressure tank 2.

[0066] The first pressure stabilizing device 4 also includes a pressure relief valve 44, which is an adjustable electric control valve. A pressure relief pipe 45 is connected to the outside of the volumetric pressure tank 2, and the pressure relief valve 44 is installed on the pressure relief pipe 45. The pressure relief valve 44 can control the opening of the pressure relief pipe 45. Due to the non-linear characteristics of the air supply pressure of the high-pressure blower 1, when the high-pressure blower 1 delivers a small flow of air to the volumetric pressure tank 2, the blowing intensity of the high-pressure blower 1 can be increased. Opening the pressure relief valve 44 achieves pressure relief control of the volumetric pressure tank 2, reducing the adjustment range required by the high-pressure blower 1, lowering the control difficulty of the high-pressure blower 1, and making the air pressure more easily stabilized.

[0067] Reference Figure 1 and Figure 2The first pressure stabilizing device 4 also includes a first controller 43. The first pressure sensor 42, the variable frequency drive 41 and the pressure relief valve 44 are all electrically connected to the first controller 43. Thus, the first controller 43 receives the pressure detection results of the first pressure sensor 42 in the volumetric pressure tank 2 to control the opening and closing of the variable frequency drive 41 and the pressure relief valve 44, thereby realizing fully automatic control of the air pressure in the volumetric pressure tank 2.

[0068] The principle of this application embodiment is as follows: This application uses the first pressure sensor 42 to detect the air pressure in the volumetric pressure tank 2 in real time, and adjusts the control value of the frequency converter 41 according to the air pressure detection result to control the high-pressure blower 1, thereby realizing the regulation of the air pressure in the volumetric pressure tank 2 and maintaining the air pressure in the volumetric pressure tank 2 at one atmosphere; on the basis of the above, the pressure relief valve 44 is used to realize pressure relief control. Therefore, when the high-pressure blower 1 delivers a small flow of air into the volumetric pressure tank 2, the blowing intensity of the high-pressure blower 1 can be increased, the pressure relief valve 44 can be opened to control, the adjustment range of the high-pressure blower 1 can be reduced, and the air pressure can be more easily stabilized and controlled.

[0069] In addition, after connecting the volumetric pressure tank 2 to the equipment that needs to form a standard atmospheric pressure environment, this device can also provide the equipment with air at a standard atmospheric pressure, so that a standard atmospheric pressure environment is formed inside the equipment to meet the requirements of the testing equipment for the testing environment required by different testing procedures.

[0070] Secondly, the standard atmospheric pressure gas supply method for high-altitude areas provided in this application adopts the following technical solution:

[0071] A method for supplying standard atmospheric pressure gas in high-altitude areas, utilizing the gas supply equipment described in Example 1 above, includes the following steps:

[0072] S1: Preset variable frequency speed controller 41: Set two control values ​​for variable frequency speed controller 41. One control value is the lower limit of the pressure relief valve 44 opening, and the other is the upper limit of the pressure relief valve 44 closing.

[0073] Specifically, when the control value of the variable frequency speed controller 41 is lower than the lower limit of the pressure relief valve 44 opening, the high-pressure blower 1 delivers air at a smaller displacement.

[0074] In this state, the control value of the variable frequency drive 41 needs to be adjusted to a smaller value. Therefore, the required control range of the variable frequency drive 41 is large and the control is difficult, making it difficult to stabilize the air delivery volume of the high-pressure blower 1.

[0075] Therefore, when the control value of the frequency converter 41 is low, opening the pressure relief valve 44 allows the gas in the volumetric pressure tank 2 to be discharged. Consequently, the control value of the frequency converter 41 needs to be increased to increase the air supply of the high-pressure blower 11, in order to compensate for the discharge from the pressure relief valve 44. At this time, the air supply of the high-pressure blower 1 will increase, thereby increasing the stability of the air supply from the high-pressure blower 1 and achieving stable air pressure control within the volumetric pressure tank 2.

[0076] Therefore, the control value of the variable frequency drive 41 when the pressure relief valve 44 needs to be engaged is set to the lower limit value of the opening of the pressure relief valve 44.

[0077] Specifically, when the control value of the variable frequency drive 41 is higher than the upper limit of the pressure relief valve 44, the high-pressure blower 1 delivers air at a larger or normal discharge rate. The control value of the variable frequency drive 41 will be in a normal state, and the high-pressure blower 1 can be stably delivered by the variable frequency drive 41 alone. At this time, the pressure relief valve 44 loses its function.

[0078] Therefore, the control value of the variable frequency drive 41 that needs to change the pressure relief valve 44 from the open state to the closed state is set to the upper limit value of the pressure relief valve 44 closing.

[0079] S2: Start the high-pressure blower 1 to begin supplying gas into the volumetric pressure tank 2.

[0080] S3: Preliminary adjustment: When the high-pressure blower 1 starts supplying air, since the output displacement of the high-pressure blower 1 is unknown and the air supply pressure needs to be maintained at one atmosphere, the control value of the variable frequency drive 41 is quickly adjusted to the corresponding value according to the air pressure in the volumetric pressure tank 2 detected by the first pressure sensor 42. At this time, the high-pressure blower 1 changes the air speed input into the volumetric pressure tank 2 according to the current control value of the variable frequency drive 41.

[0081] S4: Cyclic regulation, based on the air pressure value detected by the first pressure sensor 42 in the current volumetric pressure tank 2, adjusts the control value of the frequency converter 41 to change the air delivery volume of the high-pressure blower 1; and controls the opening and closing of the pressure relief valve 44 and adjusts the opening status of the pressure relief valve 44 according to the control value of the frequency converter 41, so that the air pressure in the volumetric pressure tank 2 can be stabilized at one atmosphere.

[0082] S41: When the control value of the variable frequency drive 41 is higher than the lower limit of the pressure relief valve 44 opening, the pressure relief valve 44 is closed, the high pressure blower 1 remains open, and the control value of the variable frequency drive 41 is adjusted according to the air pressure in the volumetric pressure tank 2.

[0083] Specifically, when the control value of the variable frequency drive 41 is higher than the lower limit of the pressure relief valve 44 opening, the control value of the variable frequency drive 41 is within the normal adjustment range, and the high-pressure blower 1 is also in normal working condition, so the pressure relief valve 44 does not need to be opened. At this time, the control value of the variable frequency drive 41 is adjusted only according to the detection result of the air pressure in the volumetric pressure tank 2 by the first pressure sensor 42 to achieve variable frequency speed regulation of the high-pressure blower 1, and the air pressure in the volumetric pressure tank 2 is maintained solely by the high-pressure blower 1.

[0084] S42: When the control value of the variable frequency drive 41 is lower than the lower limit of the pressure relief valve 44 opening, both the pressure relief valve 44 and the high-pressure blower 1 open, and the control value of the variable frequency drive 41 is adjusted according to the air pressure in the volumetric pressure tank 2.

[0085] Specifically, as the air pressure inside the volumetric pressure tank 2 continuously increases, the air delivery volume of the high-pressure blower 1 will continuously decrease, which means that the control value of the frequency converter 41 will continuously decrease.

[0086] When the control value of the variable frequency drive 41 is lower than the lower limit of the pressure relief valve 44 opening, the control value of the variable frequency drive 41 at this time is set to the lower limit that the control value of the variable frequency drive 41 can be adjusted. When adjusting the control value of the variable frequency drive 41 in the future, it must be higher than this lower limit.

[0087] The pressure relief valve 44 is opened. As the pressure relief valve 44 is opened, the gas in the volumetric pressure tank 2 will be discharged, which will increase the demand for air supply in the volumetric pressure tank 2, thereby increasing the control value of the frequency converter 41 and increasing the air supply of the high-pressure blower 1.

[0088] The pressure relief valve 44 is stopped adjusting when the pressure inside the pressure tank 2 stabilizes at one atmosphere. In this state, the pressure relief valve 44, the pressure tank 2, and the high-pressure blower 1 create a dynamic balance inside the pressure tank 2. At this time, the control value of the variable frequency drive 41 is adjusted according to the air pressure inside the pressure tank 2 to maintain the air pressure inside the pressure tank 2 at one atmosphere.

[0089] S43: When the control value of the variable frequency drive 41 is higher than the upper limit of the pressure relief valve 44, the pressure relief valve 44 is closed, the high pressure fan 1 remains open, and the control value of the variable frequency drive 41 is adjusted according to the air pressure in the volumetric pressure tank 2.

[0090] Specifically, when the control value of the variable frequency drive 41 is higher than the upper limit of the pressure relief valve 44, the control value of the variable frequency drive 41 is sufficient to keep the output of the high-pressure blower 1 in normal working condition, requiring the pressure relief valve 44 to continue assisting the high-pressure blower 1. Therefore, the pressure relief valve 44 is slowly closed until it is completely closed. During the closing process of the pressure relief valve 44, the control value of the variable frequency drive 41 is adjusted according to the air pressure in the volumetric pressure tank 2 to keep the pressure in the volumetric pressure tank 2 at a standard atmospheric pressure.

[0091] S44: Repeat steps S41 to S43 above so that the entire gas supply device can adjust the pressure relief valve 44 and the frequency converter 41 in a timely manner to maintain the pressure inside the pressure tank 2 at a standard atmospheric pressure.

[0092] S5: Gas supply ends, shut down the device.

[0093] The implementation principle of this application embodiment is as follows: low-pressure air is compressed by high-pressure blower 1 to reach high-pressure air. In order to make the air pressure reach and stabilize at a standard atmospheric pressure, the air pressure is detected in real time by the first sensor, and the control value of the variable frequency speed controller 41 is adjusted in a timely manner according to the detection result to change the speed of high-pressure blower 1, thereby directly realizing the transformation of air pressure from low pressure to standard atmospheric pressure.

[0094] To ensure the stability of air pressure under any circumstances, a pressure relief valve 44 is added to control the nonlinear characteristics of the high-pressure blower's air supply pressure. The control value of the variable frequency drive 41 is used as the condition for opening and closing the pressure relief valve 44. When the volumetric pressure tank 2 has a small air supply demand, the blowing intensity of the high-pressure blower 1 can be increased, the pressure relief valve 44 can be opened, the adjustment range of the high-pressure blower 1 can be reduced, and the air pressure can be more easily controlled and stabilized.

[0095] Example 2:

[0096] A standard atmospheric pressure gas supply device for high-altitude areas, referring to Figure 3 and Figure 4 The system includes an air compressor 10, an atmospheric pressure air supply tank 20, and a high-pressure air tank 30. The air compressor 10 and the high-pressure air tank 30 are interconnected, allowing air at a pressure higher than atmospheric pressure to be pumped into the high-pressure air tank 30. A high-pressure pipeline 40 is provided between the high-pressure air tank 30 and the atmospheric pressure air supply tank 20, with both ends of the high-pressure pipeline 40 connected to the high-pressure air tank 30 and the atmospheric pressure air supply tank 20, respectively, so that the high-pressure pipeline 40 can introduce air from the high-pressure air tank 30 into the atmospheric pressure air supply tank 20.

[0097] A second pressure stabilizing device 50 is installed between the atmospheric pressure supply tank 20 and the high-pressure tank 30. The second stabilizing device includes an actuator valve 501, which is an electrically operated regulating valve and is installed on the high-pressure pipeline 40. The actuator valve 501 can control the opening, closing, and opening degree of the high-pressure pipeline 40.

[0098] The second pressure stabilizing device 50 also includes a second pressure sensor 502, which is installed inside the atmospheric pressure supply tank 20 and is used to detect the air pressure inside the atmospheric pressure control tank.

[0099] The second pressure stabilizing device 50 also includes a second controller 503, and the actuator valve 501 and the second pressure sensor 502 are both electrically connected to the second controller 503. The second controller 503 can receive the detection data from the second pressure sensor 502 and automatically control the actuator valve 501. By controlling the opening size of the actuator valve 501, the air pressure in the atmospheric pressure supply tank 20 can be maintained at one atmosphere.

[0100] The principle of the embodiment of this application is as follows: the air compressor 10 intermittently supplies air to increase the air pressure in the high-pressure air tank 30 to 5 to 7 atmospheres. The actuator 501 is adjusted to introduce the high-pressure gas in the high-pressure air tank 30 into the atmospheric pressure supply tank 20. The second pressure sensor 502 detects the air pressure in the atmospheric pressure supply tank 20 and adjusts the opening size of the actuator 501 based on the detection result to maintain the air pressure in the atmospheric pressure supply tank 20 at one atmosphere.

[0101] In addition, after connecting the atmospheric pressure supply tank 20 to the equipment that needs to form a standard atmospheric pressure environment, this device can also provide the equipment with standard atmospheric pressure air, so that a standard atmospheric pressure environment is formed inside the equipment to meet the requirements of the testing equipment for the testing environment required by different testing procedures.

[0102] A method for supplying standard atmospheric pressure gas in high-altitude areas, utilizing the gas supply equipment described in Example 2 above, includes the following steps:

[0103] S1: Compression: Air is compressed by air compressor 10 to a state higher than standard atmospheric pressure and stored in high-pressure gas tank 30. Preferably, the compressed high-pressure gas has a pressure of 5 to 7 atmospheres.

[0104] S2: Release: Based on the air pressure detected by the second pressure sensor 502 in the atmospheric pressure supply tank 20, open the actuator valve 501 to release the high-pressure gas in the high-pressure tank 30 into the atmospheric pressure supply tank 20.

[0105] S3: Adjustment: During the release of high-pressure gas, the opening size of the actuator valve 501 is adjusted according to the gas pressure data in the atmospheric pressure supply tank 20 detected by the second pressure sensor 502; ultimately, the gas pressure in the atmospheric pressure supply tank 20 is maintained at one atmosphere.

[0106] The principle of this embodiment is as follows: An air compressor 10 intermittently supplies air to a high-pressure gas tank 30, raising the pressure in the tank to 5 to 7 atmospheres. Then, through the adjustment of the actuator valve 501, the high-pressure gas in the high-pressure tank 30 is released to the atmospheric pressure supply tank 20, reducing the pressure and raising the pressure in the atmospheric pressure supply tank 20 to standard atmospheric pressure. During this process, the detection data from the second pressure sensor 502 is used to adjust the opening amount of the actuator valve 501, maintaining the pressure in the atmospheric pressure supply tank 20 at one atmosphere. This achieves a control method that transitions from low pressure to high pressure and then to standard atmospheric pressure. This device has a simple control method, low-cost control equipment, and is not easily damaged.

[0107] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for supplying standard atmospheric pressure gas in high-altitude areas, characterized in that, The device includes: a standard atmospheric pressure gas supply equipment for high-altitude areas, the gas supply equipment including a high-pressure blower (1) and a volumetric pressure tank (2), the high-pressure blower (1) and the volumetric pressure tank (2) being interconnected, and a first pressure stabilizing device (4) being provided between the high-pressure blower (1) and the volumetric pressure tank (2); the first pressure stabilizing device (4) includes a variable frequency drive (41), a first pressure sensor (42) and a first controller (43), the first controller (43) being electrically connected to the variable frequency drive (41) and the first pressure sensor (42) respectively, the first pressure sensor (42) being provided on the volumetric pressure tank (2), and the variable frequency drive (41) being electrically connected to the high-pressure blower (1); the first pressure stabilizing device (4) also includes a pressure relief valve (44), the pressure relief valve (44) being interconnected with the volumetric pressure tank (2); the pressure relief valve (44) being electrically connected to the first controller (43); It also includes the following steps: S1: Preset the parameters of the variable frequency speed controller (41): Set two control values ​​for the variable frequency speed controller (41), one control value is the lower limit value for opening the pressure relief valve (44), and the other is the upper limit value for closing the pressure relief valve (44); S2: Start the high-pressure blower (1); S3: Preliminary adjustment: Adjust the control value of the variable frequency speed controller (41) to the corresponding value according to the air pressure in the volumetric pressure tank (2); S4: Cyclic regulation; S41: When the control value of the variable frequency drive (41) is higher than the lower limit of the pressure relief valve (44) opening, the pressure relief valve (44) is closed, the high pressure blower (1) remains open, and the control value of the variable frequency drive (41) is adjusted according to the air pressure in the volumetric pressure tank (2). S42: When the control value of the variable frequency drive (41) is lower than the lower limit of the opening of the pressure relief valve (44), both the pressure relief valve (44) and the high-pressure blower (1) are opened, and the control value of the variable frequency drive (41) is adjusted according to the air pressure in the volumetric pressure tank (2). S43: When the control value of the variable frequency drive (41) is higher than the upper limit of the pressure relief valve (44) closing, the pressure relief valve (44) closes, the high pressure blower (1) remains open, and the control value of the variable frequency drive (41) is adjusted according to the air pressure in the volumetric pressure tank (2). S44: Repeat steps S41 to S43.

2. The method for supplying standard atmospheric pressure gas in high-altitude areas according to claim 1, characterized in that: Step S42 further includes: when the control value of the variable frequency drive (41) is lower than the lower limit of the opening of the pressure relief valve (44), setting the control value of the variable frequency drive (41) at this time to the lower limit that the control value of the variable frequency drive (41) can be adjusted.

3. The method for supplying standard atmospheric pressure gas in high-altitude areas according to claim 1, characterized in that: Step S42 also includes: when the pressure inside the volumetric pressure tank (2) reaches one atmosphere, stop adjusting the pressure relief valve (44) and adjust the control value of the variable frequency speed controller (41) according to the air pressure inside the volumetric pressure tank (2).

4. The method for supplying standard atmospheric pressure gas in high-altitude areas according to claim 1, characterized in that: Step S43 also includes: the pressure relief valve (44) is slowly closed until the pressure relief valve (44) is completely closed.

5. The method for supplying standard atmospheric pressure gas in high-altitude areas according to claim 4, characterized in that: When the pressure relief valve (44) is slowly closed, the control value of the variable frequency drive (41) is adjusted according to the air pressure in the volumetric pressure tank (2).

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