Pipeline system pressure stabilizing device based on gas driving and control method

Abstract

The invention discloses a pipeline system pressure stabilizing device based on gas driving and a control method.The pressure stabilizing device comprises a first air pressure regulation and control circuit and a second air pressure regulation and control circuit, a high-pressure water tank is connected with a pipeline system, the first air pressure regulation and control circuit comprises an air compressor and an air storage tank which are sequentially connected, and the air storage tank stores compressed air; the second air pressure regulation and control circuit comprises an air cylinder and a pressure controller which are sequentially connected through a pipeline, the outlet end of the pressure controller is connected with an air inlet of the high-pressure water tank through an air inlet pipe, and high-pressure air in the air cylinder is mixed with compressed air conveyed by the air storage tank after being subjected to pressure regulation through the pressure controller and then enters the air inlet pipe. The pressure controller is used for adjusting the valve opening degree of the outlet end of the pressure controller according to the water pressure of the bottom of the high-pressure water tank, so that the sum of the air pressure applied by the pressure controller, the air storage tank and the water pressure of the bottom of the high-pressure water tank is equal to the preset pressure value of the high-pressure water tank. Meanwhile, manpower is saved.

Description

Technical Field

[0001] This invention relates to the field of pipeline system drive device technology, and in particular to a gas-driven pipeline system pressure stabilizing device and control method. Background Technology

[0002] With the formulation of the maritime power strategy, higher demands have been placed on the performance and combat capabilities of my country's maritime military equipment. Underwater vehicles play an indispensable role in modern warfare. To enhance the deterrent power and maritime combat capabilities of my country's maritime military equipment and meet its security requirements, it is urgent to suppress the radiated noise generated by underwater vehicles to improve their stealth. The piping system is a crucial system for underwater vehicles, undertaking tasks such as transportation, cooling, and balancing. However, during operation, the internal fluid circulates under the drive of pumps, generating strong pressure pulsations. These pulsating fluids and pipes mutually excite and couple, easily inducing coupled vibrations in the piping system and its auxiliary pipe structures. This system vibration is transmitted to the vehicle's shell structure through supports / hangers, exacerbating the radiated noise of underwater vehicles and directly posing a significant threat to their stealth. Therefore, exploring new piping drive devices is of great significance for reducing pipe coupling vibration and minimizing vibration transmission.

[0003] By using compressed gas to drive the flow of liquid within a pipeline, precise pressure regulation and rapid power adjustment can be achieved. This also avoids pipeline coupling vibrations caused by pump-driven fluid flow, reducing vibration transmission. However, current gas-driven devices primarily rely on pressure-reducing valves for pressure regulation, but their insufficient adjustment precision prevents precise control of pipeline pressure. For example, Chinese patent CN201610240287.4 discloses a driving gas pipeline connection device. This device connects multiple driving gas storage cylinders via multi-port connectors, with gas powering the extinguishing agent storage cylinders via a one-way valve. The device ensures stable driving pressure through a pressure-reducing orifice plate and a low-leakage, high-sealing valve. Chinese patent CN201810256976.3 discloses a pneumatic driving device and its gas supply system. This device adjusts the gas pressure by changing the distance the adjusting rod penetrates the conical orifice to adjust the opening of the air inlet. Both of these patents directly control pressure by controlling the opening of the regulating valve, resulting in limited adjustment precision. Chinese patent CN201810226908.2 discloses a pressure regulating device for adjusting the air pressure in an engine intake manifold. The device receives air pressure information through a control module and sends commands to a drive module. The drive module, a motor, rotates to move a valve core within a valve body, thus adjusting the valve opening and controlling the pressure. While this method eliminates the traditional manual adjustment, motor vibration can introduce additional noise during actual pressure regulation. Furthermore, the system indirectly regulates the pipeline pressure by using a position sensor to measure the valve opening and feeding it back to the control system, resulting in limited adjustment accuracy. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a gas-driven pipeline system pressure stabilizing device and control method, which can reduce pipeline system noise, achieve precise control of internal liquid pressure, and save manpower.

[0005] The first aspect of this invention provides a gas-driven pipeline system pressure stabilizing device, comprising: a first pressure regulating line and a second pressure regulating line connected to the air inlet of a high-pressure water tank, the water outlet of the high-pressure water tank being connected to the pipeline system; the first pressure regulating line including an air compressor and an air storage tank connected in sequence through pipelines, the air storage tank storing medium-pressure compressed air; the second pressure regulating line including a gas cylinder and a pressure controller connected in sequence through pipelines; the outlet end of the pressure controller being connected to the air inlet of the high-pressure water tank via an air inlet pipe; the high-pressure gas in the gas cylinder being pressure-regulated by the pressure controller and then mixed with the compressed gas delivered by the air storage tank before entering the air inlet pipe; the pressure controller being used to adjust the valve opening at the outlet end of the pressure controller according to the water pressure at the bottom of the high-pressure water tank, so that the sum of the air pressure applied by the gas storage tank and the water pressure at the bottom of the high-pressure water tank equals a preset pressure value.

[0006] Optionally, a pressure reducing valve is connected between the gas cylinder and the pressure controller. The high-pressure gas in the gas cylinder is first reduced in pressure by the pressure reducing valve and then regulated by the pressure controller.

[0007] Optionally, the pressure controller also includes an inlet end and a monitoring end. The inlet end is connected to a pressure reducing valve, and the monitoring end is connected to a high-pressure water tank to monitor the pressure at the bottom of the high-pressure water tank.

[0008] Optionally, the monitoring end of the pressure controller is connected to the lower end of the high-pressure water tank, and the outlet end of the pressure controller is connected to the upper end of the high-pressure water tank.

[0009] Optionally, the pressure controller is designed based on a PID control system and has a display screen for inputting preset pressure values.

[0010] Optionally, the air inlet is located at the upper end of the high-pressure water tank, and the upper end of the high-pressure water tank also has an exhaust port. The water outlet is located at the lower end of the high-pressure water tank, and the lower end of the high-pressure water tank also has a water inlet and a monitoring port.

[0011] Optionally, the gas cylinder contains nitrogen.

[0012] Optionally, the gas pressure supplied from the gas storage tank to the air inlet pipe shall not exceed 1.2 MPa.

[0013] A second aspect of this invention provides a gas-driven pipeline system pressure stabilization control method, based on any of the aforementioned gas-driven pipeline system pressure stabilization devices, comprising the following steps: Medium-pressure compressed air is supplied to the air storage tank by an air compressor, and the high-pressure gas in the gas cylinder is delivered to the pressure controller and then mixed with the compressed air in the air storage tank. The fused gases are applied to the liquid inside the high-pressure water tank. The pressure controller adjusts the valve opening at the outlet of the pressure controller in real time according to the water pressure at the bottom of the high-pressure water tank, thereby adjusting the driving pressure applied to the liquid inside the high-pressure water tank. This ensures that the sum of the driving pressure, the gas pressure applied by the gas storage tank, and the gas pressure regulated by the pressure controller equals the preset value, thus achieving precise regulation of the pipeline system pressure.

[0014] Optionally, the high-pressure gas in the cylinder is delivered to the pressure controller by means of: the high-pressure gas in the cylinder being initially depressurized by a pressure reducing valve and then delivered to the pressure controller.

[0015] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art: This invention provides a gas-driven pipeline system pressure stabilization device and control method. In application, the combined gas pressure applied by the gas cylinder and gas storage tank acts on the liquid inside the high-pressure water tank, thereby transmitting pressure to the pipeline system. As the volume of liquid in the high-pressure water tank decreases, the water pressure inside the tank drops. Simultaneously, the gas volume in the gas storage tank decreases, and its internal pressure also decreases. The gas pressure applied by the gas cylinder is controlled by a pressure controller; with the valve opening unchanged, the pressure change is minimal. To achieve pressure stabilization control of the pipeline system, a preset pressure value is established. The pressure value at the bottom of the high-pressure water tank, which includes the combined gas pressure applied by the gas cylinder and gas storage tank, is monitored. By adjusting the valve opening at the outlet of the pressure controller, the pressure applied by the gas cylinder to the high-pressure water tank is changed until the sum of this pressure, the gas pressure applied by the gas storage tank, and the water pressure at the bottom of the high-pressure water tank equals the preset pressure value, thus achieving pressure stabilization. The air tank not only provides the air volume required to drive the pipeline system, but the compressed gas inside also has a certain pressure, which can act as a buffer when the pressure controller adjusts the liquid driving pressure in the high-pressure water tank. The pressure value at the bottom of the high-pressure water tank is monitored and fed back to the pressure controller, thereby adjusting the valve opening inside the controller in real time and stabilizing the driving pressure of the pipeline system. The gas-driven pipeline system pressure stabilization device and control method proposed in this invention addresses the issue that if the gas cylinder were to directly apply the required gas pressure to the pipeline system, the limited gas volume and high pressure inside the cylinder would result in a relatively low actual pipeline system pressure, even after pressure reduction by the pressure controller. Directly replenishing the reduced pressure caused by the decrease in liquid inside the high-pressure water tank would easily lead to drastic pressure changes and potentially generate additional noise. Therefore, by using an air compressor and air tank to supplement a certain amount of gas volume, the gas cylinder primarily functions to apply gas pressure. This pressure-driven approach provides a stable pressure to the pipeline system, reducing the vibration generated by traditional pump-driven pipeline systems, reducing vibration transmission, and to some extent reducing the radiated noise of underwater vehicles. Attached Figure Description

[0016] Figure 1 A schematic diagram of a gas-driven pipeline system pressure stabilizing device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the pressure regulation principle of a gas-driven pipeline system pressure stabilizing device provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Air compressor; 2. Air tank; 3. Gas cylinder; 4. Pressure reducing valve; 5. Pressure controller; 6. High-pressure water tank; 6-1. Air inlet; 6-2. Exhaust outlet; 6-3. Water inlet; 6-4. Monitoring port; 6-5. Water outlet; 7. Piping system. Detailed Implementation

[0018] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] The present invention will be described below through several specific embodiments. To keep the following description of the embodiments clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numerals in each drawing.

[0021] refer to Figure 1 , Figure 1 A schematic diagram of a gas-driven pipeline system pressure stabilizing device provided in an embodiment of the present invention is shown below. Figure 1As shown, the first aspect of this invention provides a gas-driven pipeline system pressure stabilizing device, which utilizes the mixing and regulation of compressed air and high-pressure gas to achieve rapid and precise pressure regulation. The pressure stabilizing device includes: a first pressure regulation circuit and a second pressure regulation circuit respectively connected to the air inlet 6-1 of a high-pressure water tank 6; and an outlet 6-5 of the high-pressure water tank 6 connected to a pipeline system 7. The high-pressure water tank 6 serves as a pressure buffer container, with its air inlet 6-1 receiving the mixed gas and its outlet 6-5 connected to the pipeline system 7. Pipeline pressure is maintained through gas-liquid coupling. The high-pressure water tank 6 is used for... To ensure the water supply required by the pipeline system 7 and to withstand a certain amount of high pressure, the first air pressure control circuit includes an air compressor 1 and an air storage tank 2 connected sequentially through pipelines. The air compressor 1 continuously generates compressed air (e.g., 0.8MPa~1.5MPa), and the air storage tank 2 stores medium-pressure compressed air to balance the output fluctuations of the air compressor 1 and ensure a stable air supply. The second air pressure control circuit provides high-pressure gas and dynamically regulates the pressure. The second air pressure control circuit includes a gas cylinder 3 and a pressure controller 5 connected sequentially through pipelines. The gas cylinder 3 is used to store a certain volume of high-pressure gas (e.g., 10~30... (MPa, can be nitrogen, air or other inert gas). Pressure controller 5 adjusts the valve opening in real time according to the water pressure in high-pressure water tank 6 to output variable pressure gas. The outlet of pressure controller 5 is connected to the air inlet 6-1 of high-pressure water tank 6 through an air inlet pipe. After the high-pressure gas in gas cylinder 3 is regulated by pressure controller 5, it mixes with the compressed gas delivered by gas storage tank 2 and enters the air inlet pipe. Pressure controller 5 is used to adjust the valve opening at the outlet of pressure controller 5 according to the water pressure at the bottom of high-pressure water tank 6, so that the sum of the gas pressure applied by gas storage tank 2 and the water pressure at the bottom of high-pressure water tank 6 is equal to the preset pressure value. The two gases mix in front of the air inlet 6-1 of high-pressure water tank 6 to form a mixed gas pressure. Its total pressure and the sum of the water pressure at the bottom of high-pressure water tank 6 match the preset value. The outlet 6-5 of high-pressure water tank 6 is connected to pipeline system 7 through a valve or directly. The overall pressure in high-pressure water tank 6 drives the water flow to output stably.

[0022] The core function of pressure controller 5 is to dynamically balance air pressure, and the specific process is as follows: Pressure monitoring: Real-time monitoring of the water pressure at the bottom of the high-pressure water tank 6 (if possible via a pressure sensor, not shown in the diagram).

[0023] Calculate air pressure requirement: Subtract the current water pressure from the preset pressure value (e.g., 1.2 MPa) to obtain the air pressure difference that needs to be replenished.

[0024] Valve adjustment: If the medium-pressure gas (e.g., 1.0 MPa) in the gas storage tank 2 is insufficient, the pressure controller 5 increases the opening to release more high-pressure gas (e.g., outputting 0.2 MPa from the gas cylinder 3), so that the mixed gas pressure minus the current water pressure reaches 1.2 MPa.

[0025] If a decrease in water usage leads to an increase in water pressure, reduce the valve opening and decrease the amount of high-pressure gas supplied.

[0026] This invention provides a gas-driven pipeline system pressure stabilization device and control method. In application, the combined gas pressure applied by the gas cylinder and gas storage tank acts on the liquid inside the high-pressure water tank, thereby transmitting pressure to the pipeline system. As the volume of liquid in the high-pressure water tank decreases, the water pressure inside the tank drops. Simultaneously, the gas volume in the gas storage tank decreases, and its internal pressure also decreases. The gas pressure applied by the gas cylinder is controlled by a pressure controller; with the valve opening unchanged, the pressure change is minimal. To achieve pressure stabilization control of the pipeline system, a preset pressure value is established. The pressure value at the bottom of the high-pressure water tank, which includes the combined gas pressure applied by the gas cylinder and gas storage tank, is monitored. By adjusting the valve opening at the outlet of the pressure controller, the pressure applied by the gas cylinder to the high-pressure water tank is changed until the sum of this pressure, the gas pressure applied by the gas storage tank, and the water pressure at the bottom of the high-pressure water tank equals the preset pressure value, thus achieving pressure stabilization. The air tank not only provides the air volume required to drive the pipeline system, but the compressed gas inside also has a certain pressure, which can act as a buffer when the pressure controller adjusts the liquid driving pressure in the high-pressure water tank. The pressure value at the bottom of the high-pressure water tank is monitored and fed back to the pressure controller, thereby adjusting the valve opening inside the controller in real time and stabilizing the driving pressure of the pipeline system. The gas-driven pipeline system pressure stabilization device and control method proposed in this invention addresses the issue that if the gas cylinder were to directly apply the required gas pressure to the pipeline system, the limited gas volume and high pressure inside the cylinder would result in a relatively low actual pipeline system pressure, even after pressure reduction by the pressure controller. Directly replenishing the reduced pressure caused by the decrease in liquid inside the high-pressure water tank would easily lead to drastic pressure changes and potentially generate additional noise. Therefore, by using an air compressor and air tank to supplement a certain amount of gas volume, the gas cylinder primarily functions to apply gas pressure. This pressure-driven approach provides a stable pressure to the pipeline system, reducing the vibration generated by traditional pump-driven pipeline systems, reducing vibration transmission, and to some extent reducing the radiated noise of underwater vehicles.

[0027] The conventional gas cylinder 3 has a relatively high gas pressure, for example, about 15MPa currently in use. The pipeline system 7 requires a maximum pressure of less than 0.3MPa. If the pressure is directly adjusted through the pressure controller 5, the pressure difference to be adjusted will vary greatly, which can easily cause a certain amount of noise.

[0028] Based on the above problems, the first aspect of the present invention provides a gas-driven pipeline system pressure stabilizing device in which a pressure reducing valve 4 is connected between a gas cylinder 3 and a pressure controller 5. The pressure reducing valve 4 is used to reduce the high-pressure gas in the gas cylinder 3 to a certain pressure. The high-pressure gas in the gas cylinder 3 is first reduced by the pressure reducing valve 4 and then regulated by the pressure controller 5. The pressure of the gas cylinder 3 is first reduced by a certain amount by the pressure reducing valve 4 and then regulated by the pressure controller 5. The pressure change range is small, and the generation of noise can also be further reduced.

[0029] Optionally, the pressure controller 5 also includes an inlet end and a monitoring end. The inlet end is connected to the pressure reducing valve 4, and the monitoring end is connected to the high-pressure water tank 6 to monitor the pressure at the bottom of the high-pressure water tank 6. The pressure regulating valve is encapsulated inside the pressure controller 5. The pressure regulating valve changes the valve opening at the outlet end of the pressure controller 5 in real time through the pressure signal fed back from inside the high-pressure water tank 6, thereby adjusting the pressure value of the liquid applied inside the high-pressure water tank 6, and thus realizing precise control of the driving pressure of the pipeline system 7.

[0030] The pressure controller 5, as the core control unit of the pressure stabilizing device, adopts a closed-loop feedback control mechanism to ensure that the pressure at the bottom of the high-pressure water tank 6 remains stable at a preset value through real-time monitoring and dynamic adjustment. Its key components include: Inlet: connected to the outlet of the pressure reducing valve 4, receiving high-pressure gas after preliminary pressure reduction (e.g., gas output from gas cylinder 3 is reduced to a medium-pressure range by the pressure reducing valve 4); Monitoring end: connected to the bottom of the high-pressure water tank 6 via a pressure sensor or pressure guide pipe, collecting real-time pressure data at the bottom of the high-pressure water tank 6; Outlet: connected to the air inlet 6-1 of the high-pressure water tank, outputting precisely controlled mixed gas (from the gas storage tank 2 and the reduced-pressure high-pressure gas); Control unit: a built-in microprocessor or mechanical adjustment mechanism that dynamically adjusts the valve opening based on the monitoring end data.

[0031] In practical applications, the gas pressure applied by gas cylinder 3 and gas storage tank 2, along with the water pressure of the liquid inside high-pressure water tank 6, acts on the pipeline system 7, thereby transmitting pressure to the pipeline system 7. As the volume of liquid in high-pressure water tank 6 decreases, the water pressure inside high-pressure water tank 6 decreases; simultaneously, the gas volume in gas storage tank 2 decreases, and its internal gas pressure also decreases. The gas pressure applied by gas cylinder 3 is controlled by pressure reducing valve 4 and pressure controller 5. With the outlet valve opening unchanged, the gas pressure change is minimal. To achieve pressure stabilization control in pipeline system 7, a preset pressure value is set in pressure controller 5, and the water pressure at the bottom of high-pressure water tank 6 is monitored. By adjusting the opening of the outlet valve of pressure controller 5, the pressure applied by gas cylinder 3 to high-pressure water tank 6 is changed until the sum of the gas pressure applied by gas storage tank 2 and the water pressure at the bottom of high-pressure water tank 6 equals the preset pressure value, thus achieving pressure stabilization.

[0032] Specifically, the monitoring end of the pressure controller 5 is connected to the lower end of the high-pressure water tank 6, and the outlet end of the pressure controller 5 is connected to the upper end of the high-pressure water tank 6. The pressure controller 5 adopts a differentiated connection method of top-outlet and bottom-measurement. By optimizing the physical position of gas input and pressure monitoring, the system response speed and control accuracy are significantly improved: the monitoring end is connected to the lower end of the high-pressure water tank 6 to directly detect the water pressure (static pressure + gas pressure) at the bottom of the high-pressure water tank 6, avoiding measurement errors caused by pressure fluctuations in the gas phase space. The outlet end is connected to the upper end of the high-pressure water tank 6: gas is injected from the top, and the gas-liquid stratification is naturally formed by utilizing the buoyancy effect, reducing the loss of gas dissolved in water.

[0033] Optionally, the pressure controller 5 is designed based on a PID control system, which can achieve high-precision control of low driving pressure in the pipeline system. The pressure controller 5 is equipped with a display screen for inputting preset pressure values.

[0034] Pressure controller 5 employs an adaptive PID algorithm to achieve precise pressure stabilization under multiple operating conditions: dynamic adjustment of control parameters: proportional coefficient (P): automatically adjusted according to the magnitude of pressure deviation (increasing response speed for large deviations and reducing overshoot for small deviations); integral time (I): automatically extending / shortening the compensation period for long-term steady-state errors; derivative action (D): predicting and acting in advance based on the rate of change of air pressure to suppress water hammer effect.

[0035] Optionally, the air inlet 6-1 is located at the upper end of the high-pressure water tank 6. The upper end of the high-pressure water tank 6 also has an exhaust port 6-2. The water outlet 6-5 is located at the lower end of the high-pressure water tank 6. The lower end of the high-pressure water tank 6 also has a water inlet 6-3 and a monitoring port 6-4. The high-pressure water tank 6 has a total of 5 interfaces. The upper part of the high-pressure water tank 6 has 2 interfaces: the air inlet 6-1 and the exhaust port 6-2. The air inlet 6-1 is connected to a three-way connector and is connected to the outlet end of the pressure controller 5 and the outlet end of the air storage tank 2. It is used to apply stable pressure to the liquid in the high-pressure water tank 6. The exhaust port 6-2 is used to discharge the air inside the high-pressure water tank 6 when it is storing water. The lower part of the high-pressure water tank 6 has 3 interfaces: the water inlet 6-3, the water outlet 6-5, and the monitoring port 6-4. The water inlet 6-3 is used to store water in the high-pressure water tank 6. The water outlet 6-5 is used to supply water to the pipeline system. The monitoring port 6-4 is connected to the monitoring end of the pressure controller 5 and feeds back the pressure signal in the high-pressure water tank 6 to the pressure controller 5.

[0036] The high-pressure water tank 6 adopts an upper and lower partition design, and achieves efficient gas and liquid management through the scientific arrangement of functional interfaces: Upper gas control area: the air inlet 6-1 can adopt a DN50 flange interface, with a 15° tilt design to prevent condensate backflow, and the exhaust port 6-2 can be equipped with an electric ball valve to automatically discharge residual air when the system starts. Lower liquid control area: the water inlet 6-3 can adopt a DN65 quick connector, with a built-in check valve to prevent backflow, and the water outlet 6-5 can be connected through a DN80 pipeline. A Venturi flow meter is installed at the outlet, and the monitoring port 6-4 can adopt a 1 / 4" NPT thread interface, which can be expanded to connect to various types of sensors.

[0037] Optionally, cylinder 3 stores nitrogen. The selection criteria for nitrogen working medium are as follows: chemical stability: the inert nature of nitrogen (N2) can avoid oxidation reaction and protect the inner wall of the water tank and the pipeline system; safety performance: compared with compressed air, nitrogen eliminates the risk of flammability (the oxygen content is zero); physical properties: critical temperature -147°C, always maintains a gaseous state at room temperature, density 1.25kg / m³ (at 20°C), which facilitates pressure calculation.

[0038] Conventional nitrogen cylinders have relatively high pressure, such as approximately 15 MPa currently in use. The maximum pressure required by the pipeline system 7 is less than 0.3 MPa. If the pressure is directly adjusted via the pressure controller 5, the pressure difference to be adjusted will vary significantly, which can easily cause a certain amount of noise. The pressure of the nitrogen cylinder is first reduced to a certain extent via the pressure reducing valve 4, and then adjusted via the pressure controller 5. This results in a smaller pressure variation range and also reduces the generation of noise.

[0039] Optionally, the gas pressure supplied from the gas storage tank 2 to the air inlet pipe shall not exceed 1.2 MPa. Compressed air is generally generated by the air compressor 1 and stored in the gas storage tank 2. The gas pressure is limited by the maximum gas pressure that the air compressor 1 can generate and the pressure bearing capacity of the gas storage tank 2. The existing air compressor 1 in the laboratory can generate gas with a maximum pressure of 0.6 MPa, and the gas storage tank 3 can withstand a maximum pressure of 1.2 MPa.

[0040] The first aspect of this invention provides a gas-driven pipeline system pressure stabilizing device. External water flows into a high-pressure water tank 6 through inlet 6-3, and excess air is discharged through outlet 6-2 until the high-pressure water tank 6 is full of liquid. The outlet of an air compressor 1 is connected to the inlet of a gas storage tank 2 via a high-pressure hose, used to supply the gas required to drive the pipeline system 7 into the gas storage tank 2. A gas cylinder 3 stores a certain volume of high-pressure gas, and its outlet is connected to the inlet of a pressure reducing valve 4 via a high-pressure pipe. The outlet of the pressure reducing valve 4 is connected to the inlet of a pressure controller 5, used to reduce the pressure of the high-pressure gas in the gas cylinder 3 and then deliver it to the pressure controller 5. A preset driving pressure is input into the pressure controller 5, and its monitoring end is connected to the monitoring port 6-4 of the high-pressure water tank, used to monitor the water pressure in the high-pressure water tank 6 in real time and provide feedback on the water pressure signal. The outlet of pressure controller 5 and the outlet of air tank 2 are connected to the air inlet 6-1 of high-pressure water tank 6 via a tee connector. This connection allows for real-time adjustment of the valve opening at the outlet of pressure controller 5 based on the feedback water pressure signal. This valve opening adjusts the amount of nitrogen and compressed air entering the high-pressure water tank 6 through the air inlet 6-1, thereby precisely regulating the driving pressure of the high-pressure water tank 6. The outlet 6-5 of high-pressure water tank 6 is connected to the piping system 7 (a flange is provided at the end of outlet 6-5 for connection to the piping system 7), providing a stable driving pressure to the piping system 7.

[0041] A second aspect of this invention provides a gas-driven pipeline system pressure stabilization control method, based on any of the aforementioned gas-driven pipeline system pressure stabilization devices, comprising the following steps: Medium-pressure compressed air is supplied to the air storage tank 2 by the air compressor 1, and the high-pressure gas in the gas cylinder 3 is delivered to the pressure controller 5 and then mixed with the compressed air in the air storage tank 2. The fused gases are applied to the liquid inside the high-pressure water tank 6. The high-pressure water tank 6 has a preset pressure value. The pressure controller 5 adjusts the valve opening at the outlet of the pressure controller 5 in real time according to the water pressure at the bottom of the high-pressure water tank 6, thereby adjusting the driving pressure applied to the liquid inside the high-pressure water tank 6. This makes the sum of the driving pressure, the gas pressure applied by the gas storage tank 2, and the gas pressure regulated by the pressure controller 5 equal to the preset value, thereby achieving precise regulation of the pipeline system pressure.

[0042] Optionally, the high-pressure gas in cylinder 3 is delivered to pressure controller 5 by means of: the high-pressure gas in cylinder 3 being initially depressurized by pressure reducing valve 4 and then delivered to pressure controller 5.

[0043] refer to Figure 2 , Figure 2 A schematic diagram illustrating the pressure regulation principle of a gas-driven pipeline system pressure stabilizing device provided in an embodiment of the present invention is shown below. Figure 2As shown, compressed air at a certain pressure is supplied to the air storage tank 2 by the air compressor 1. The high-pressure gas in the nitrogen cylinder is initially depressurized by the pressure reducing valve 4 and then sent to the pressure controller 5, where it mixes with the compressed air in the air storage tank 2. Due to the large volume of the high-pressure water tank 6, the gas volume cannot be replenished in time if only the nitrogen cylinder is used to provide pressure. A certain amount of gas volume can be replenished by the air compressor 1 and the air storage tank 2. The nitrogen cylinder mainly plays the role of applying gas pressure. The pipelines containing the air compressor 1 and the air storage tank 2 do not require pressure adjustment. At the beginning of equipment operation, a certain amount of low-pressure gas is supplied to the air storage tank 2 by the air compressor 1 to replenish the gas volume during the pressure adjustment process. At the same time, when the pressure controller 5 is adjusting the pressure, it adjusts the output pressure of the nitrogen cylinder according to the pressure detected at the bottom of the high-pressure water tank 6. The pressure at the bottom of the high-pressure water tank 6 already includes the pressure of the compressed air, which together are applied to the liquid inside the high-pressure water tank 6. A preset driving pressure is input into the pressure controller 5. The pressure controller 5 can adjust the opening of the outlet valve in real time through the water pressure signal fed back by the high-pressure water tank 6, thereby adjusting the driving pressure applied to the liquid inside the high-pressure water tank 6, and thus achieving precise adjustment of the pressure of the pipeline system 7.

[0044] The above inventions are merely a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A gas-driven pipeline system pressure stabilizing device, characterized in that, include: The first air pressure control line and the second air pressure control line are respectively connected to the air inlet (6-1) of the high-pressure water tank (6), and the water outlet (6-5) of the high-pressure water tank (6) is connected to the pipeline system (7). The first air pressure control line includes an air compressor (1) and an air storage tank (2) connected in sequence by pipelines. The air storage tank (2) stores medium-pressure compressed air. The second air pressure control circuit includes a gas cylinder (3) and a pressure controller (5) connected in sequence through a pipeline. The outlet end of the pressure controller (5) is connected to the air inlet (6-1) of the high-pressure water tank (6) through an air inlet pipe. After the high-pressure gas in the gas cylinder (3) is regulated by the pressure controller (5), it is mixed with the compressed gas delivered by the gas storage tank (2) and then enters the air inlet pipe. The pressure controller (5) is used to adjust the valve opening at the outlet end of the pressure controller (5) according to the water pressure at the bottom of the high-pressure water tank (6) so that the sum of the air pressure applied by the gas storage tank (2) and the water pressure at the bottom of the high-pressure water tank (6) is equal to the preset pressure value.

2. The gas-driven pipeline system pressure stabilizing device as described in claim 1, characterized in that, A pressure reducing valve (4) is connected between the gas cylinder (3) and the pressure controller (5). The high-pressure gas in the gas cylinder (3) is first reduced by the pressure reducing valve (4) and then adjusted by the pressure controller (5).

3. The gas-driven pipeline system pressure stabilizing device as described in claim 2, characterized in that, The pressure controller (5) also includes an inlet end and a monitoring end. The inlet end is connected to the pressure reducing valve (4), and the monitoring end is connected to the high-pressure water tank (6) to monitor the pressure at the bottom of the high-pressure water tank (6).

4. The gas-driven pipeline system pressure stabilizing device as described in claim 3, characterized in that, The monitoring end of the pressure controller (5) is connected to the lower end of the high-pressure water tank (6), and the outlet end of the pressure controller (5) is connected to the upper end of the high-pressure water tank (6).

5. The gas-driven pipeline system pressure stabilizing device as described in claim 1, characterized in that, The pressure controller (5) is designed based on a PID control system and has a display screen for inputting the preset pressure value.

6. The gas-driven pipeline system pressure stabilizing device as described in claim 1, characterized in that, The air inlet (6-1) is located at the upper end of the high-pressure water tank (6). The upper end of the high-pressure water tank (6) also has an exhaust port (6-2). The water outlet (6-5) is located at the lower end of the high-pressure water tank (6). The lower end of the high-pressure water tank (6) also has a water inlet (6-3) and a monitoring port (6-4).

7. The gas-driven pipeline system pressure stabilizing device as described in claim 1, characterized in that, The gas cylinder (3) contains nitrogen.

8. The gas-driven pipeline system pressure stabilizing device as described in claim 1, characterized in that, The gas pressure supplied by the gas storage tank (2) to the air inlet pipe is not higher than 1.2 MPa.

9. A gas-driven pipeline system pressure stabilization control method, characterized in that, The gas-driven pipeline system pressure stabilizing device according to any one of claims 1 to 8 includes the following steps: Medium-pressure compressed air is supplied to the air storage tank (2) by the air compressor (1), and the high-pressure gas in the gas cylinder (3) is delivered to the pressure controller (5) and then mixed with the compressed air in the air storage tank (2); The fused gases are applied to the liquid inside the high-pressure water tank (6). The pressure controller (5) adjusts the valve opening at the outlet of the pressure controller (5) in real time according to the water pressure at the bottom of the high-pressure water tank (6), thereby adjusting the driving pressure applied to the liquid inside the high-pressure water tank (6) so that the sum of the driving pressure, the gas pressure applied by the gas storage tank (2), and the gas pressure regulated by the pressure controller (5) equals the preset value, thereby achieving precise regulation of the pipeline system pressure.

10. The gas-driven pipeline system pressure stabilization control method as described in claim 9, characterized in that, The high-pressure gas in the gas cylinder (3) is delivered to the pressure controller (5) by means of: the high-pressure gas in the gas cylinder (3) being initially depressurized by the pressure reducing valve (4) and then delivered to the pressure controller (5).

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