Pressure regulation control device

Abstract

The utility model relates to a pressure regulation control device. The device comprises a gas storage module, a pressure regulation module, a pressure control module and a flow control module, wherein the pressure regulation module is used for regulating the pressure of the rare gas in a pipeline flowing out of the gas storage module, and a plurality of branch pressure regulation pipelines which are connected in parallel are arranged, so that at least one branch pressure regulation pipeline can work normally under the condition that some branch pressure regulation pipelines have problems due to unforeseen circumstances; therefore, redundant pressure adjustment of the whole device is achieved, and normal adjustment and control of the whole device are guaranteed. Besides, a flow control module is arranged in the pipeline, and the actual flow of the rare gas in the pipeline is adjusted in real time according to a given set value, so that the actual flow is consistent with the set flow, and the flow or flow velocity of the rare gas in the pipeline is monitored in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of rare gas control, and in particular relates to a pressure regulating control device. Background Art

[0002] Xenon is a colorless, odorless noble gas. While its chemical activity is low, it is still capable of chemical reactions, such as forming xenon hexafluoroplatinate, the first synthesized noble gas compound. Xenon is used in flash lamps and arc lamps, and as a general anesthetic. The earliest excimer laser designs used xenon dimers (Xe2) as the laser medium, and early laser designs also used xenon flash lamps for laser pumping. Xenon can also be used to search for weakly interacting massive particles (WIMPs) and as a propellant for spacecraft ion thrusters. Therefore, in practical applications, the flow of xenon gas from sealed storage tanks requires control. Existing technologies use a single pipeline to control the flow rate, with valves installed directly on the pipeline and the flow rate controlled by the valve opening. However, if a single pipeline fails at any point, the flow of xenon gas from the entire storage tank cannot be controlled, thus affecting the use of the xenon gas. Utility Model Content

[0003] In order to overcome the problems existing in the prior art, the utility model provides a pressure regulating control device to overcome the current defects.

[0004] A pressure regulating control device, comprising: a gas storage module, a pressure regulating module, a pressure control module and a flow control module;

[0005] The gas storage module stores rare gas;

[0006] The pressure regulating module is connected to the gas storage module and is used to regulate the pressure of the rare gas flowing out of the gas storage module;

[0007] The pressure control module is electrically connected to the pressure regulating module and is used to regulate the pressure in the pressure regulating module;

[0008] The flow control module is electrically connected to the pressure control module and is used to adjust the flow rate of the rare gas flowing out of the pressure regulating module;

[0009] The pressure regulating module includes a plurality of pressure branch regulating pipelines connected in parallel.

[0010] According to the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the rare gas is xenon.

[0011] According to the above aspects and any possible implementation, an implementation is further provided, wherein the gas storage module includes a plurality of storage tanks connected in parallel, each storage tank stores the rare gas, and each storage tank is connected by a gas outlet pipe.

[0012] According to the aspects described above and any possible implementation method, an implementation method is further provided, in which there are three pressure branch regulating pipelines, the first pressure branch regulating pipeline is provided with a Bang-Bang valve; the second pressure branch regulating pipeline is provided with a high-pressure self-locking valve, a mechanical pressure reducing valve and a low-pressure self-locking valve in sequence; the third pressure branch regulating pipeline is provided with an electric proportional valve.

[0013] According to the above aspects and any possible implementation, an implementation is further provided, wherein the device further includes a variable gas capacity module, and the variable gas capacity module is arranged between the pressure regulating module and the flow control module.

[0014] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the input end of the Bang-Bang valve is arranged between the high-pressure self-locking valve and the mechanical pressure reducing valve, and the output end is arranged between the variable gas capacity module and the low-pressure self-locking valve; the input end of the electric proportional valve is arranged between the mechanical pressure reducing valve and the low-pressure self-locking valve, and the output end is arranged between the low-pressure self-locking valve and the variable gas capacity module.

[0015] According to the above aspects and any possible implementation, an implementation is further provided, wherein the device further includes a low-pressure pressure sensor provided on the air outlet pipe between the low-pressure self-locking valve and the variable air capacity module.

[0016] According to the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the device further includes a filter module, and the filter module is connected between the variable gas capacity module and the flow control module.

[0017] According to the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the filtering module is a filter.

[0018] According to the above aspects and any possible implementation, a further implementation is provided, wherein the variable gas capacity module is a variable gas container.

[0019] Beneficial effects of the utility model

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The pressure regulating control device of the present invention includes: a gas storage module, a pressure regulating module, a pressure control module and a flow control module; the pressure regulating module is used to regulate the pressure of the rare gas in the pipeline flowing out of the gas storage module, and a plurality of branch pressure regulating pipelines connected in parallel are provided. In the event that some of the branch pressure regulating pipelines have problems due to unexpected circumstances, at least one branch pressure regulating pipeline is guaranteed to be able to operate normally, thereby achieving redundant pressure regulation, so that the entire device can operate normally. At the same time, after the pressure of the rare gas in the pipeline is stabilized, a flow control module is provided to adjust the actual flow of the rare gas in the pipeline in real time according to a given set value, so that the actual flow is consistent with the set flow. In order to observe the situation of the rare gas in the transportation process in real time, the present invention also provides a monitoring computer to display the pressure and flow or flow rate in the pipeline in real time, so that the staff can make real-time adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the device structure of the utility model;

[0023] Figure 2 A schematic diagram of the power supply assembly structure of the pressure control module of the present utility model;

[0024] Figure 3 This is a schematic diagram of the signal interface of the pressure control module of the present invention;

[0025] Figure 4 This is a schematic diagram of the interface of the device of the present utility model;

[0026] Figure 5 This is a schematic diagram of the circuit connection of the high-pressure or low-pressure pressure sensor of the present utility model;

[0027] Figure 6 This is a schematic diagram of the power supply component structure of the flow control module of the present utility model. DETAILED DESCRIPTION

[0028] To better understand the technical solution of the present invention, the present invention includes, but is not limited to, the specific implementation methods described below. Similar technologies and methods should be considered within the scope of protection of the present invention. To make the technical problems, technical solutions, and advantages of the present invention more clear, the following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.

[0029] It should be understood that the embodiments described in this utility model are only a portion of the embodiments of this utility model, not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this utility model.

[0030] like Figure 1 As shown, the utility model provides a pressure regulating control device, which includes: a gas storage module, a pressure regulating module, a pressure control module and a flow control module;

[0031] The gas storage module stores rare gas;

[0032] The pressure regulating module is connected to the gas storage module and is used to regulate the pressure of the rare gas flowing out of the gas storage module;

[0033] The pressure control module is electrically connected to the pressure regulating module and is used to regulate the pressure in the pressure regulating module;

[0034] The flow control module is electrically connected to the pressure control module and is used to adjust the flow of the rare gas flowing out of the pressure regulating module.

[0035] Among them, the control circuit is the collective name of the pressure control module and the flow control module, the rare gas is xenon, and the gas storage module includes several storage tanks connected in parallel, each storage tank stores the rare gas, and each storage tank is connected by an outlet pipe. The utility model preferably sets two storage tanks 1 and 2, each storage tank is provided with a branch outlet pipe, and each branch outlet pipe is connected together to form a rare gas outlet pipe.

[0036] To measure the pressure of the rare gas in the outlet pipe, the present invention installs a high-pressure pressure sensor 3 on the outlet pipe to measure the pressure there, thus providing a pressure reference for the subsequent flow of the rare gas. Insufficient pressure of the rare gas flowing out of the storage tank will lead to subsequent flow control adjustments. To address this, the present invention also installs a gas filling valve 4 on the outlet pipe to fill the outlet pipe with the same rare gas to address the pressure issue.

[0037] The pressure regulating module includes several pressure branch regulating pipelines connected in parallel. The utility model preferably adopts a three-way pressure branch regulating pipeline. A Bang-Bang valve 8 is provided on the first pressure branch regulating pipeline; a high-pressure self-locking valve 5, a mechanical pressure reducing valve 6 and a low-pressure self-locking valve 7 are provided in sequence on the second pressure branch regulating pipeline; an electric proportional valve 9 is provided on the third pressure branch regulating pipeline.

[0038] The input end of the high-pressure self-locking valve 5 is connected to the output end of the gas filling valve 4 of the gas storage module, and one end of the Bang-Bang valve 8 is connected to the output end of the high-pressure self-locking valve 5. The mechanical pressure reducing valve 6 of the second branch pipeline has one end connected to the output end of the high-pressure self-locking valve 5, and the other end is connected to the input end of the low-pressure self-locking valve 7 through a pipeline. The third branch pipeline is provided with an electric proportional valve 9, one end of which is connected to the pipeline between the other end of the mechanical pressure reducing valve 6 and the input end of the low-pressure self-locking valve 7. The other end of the electric proportional valve 9, the other end of the Bang-Bang valve 8, and the output end of the low-pressure self-locking valve 7 are connected in parallel to form a total gas outlet pipeline. The three branch pipelines are connected in parallel and the power supply is unified. When working, one of the three branch pipelines is selected for use. When one branch pipeline is working, the other two are in a redundant state. This ensures that when the device is working normally, if the branch pipeline in the working state fails, it will directly switch to the other branch pipeline, thereby not affecting the normal operation of the device. The working mode of the three branch pipelines is shown in Table 1 below.

[0039] Table 1 Working mode of three-way branch pipeline

[0040]

[0041] The function of the bang-bang valve 8 in the first branch pipeline is to protect the pressure stability of the xenon gas in the outlet pipeline. There is no restriction on the specific model of the valve, and any valve sold on the market can be used. As long as the bang-bang valve switch is driven by a 28VDC (rated) pulse signal, the electrical interface adopts a swing line method, and the swing line is a radiation-resistant and high-temperature resistant lead with a length greater than 600mm. The upstream and downstream solenoid valve leads are marked as described in the table below.

[0042] Table 2 Bang-bang valve performance indicators

[0043]

[0044] The operating voltage of the low-pressure self-locking valve 7 in the second branch pipeline is 21 to 29.05 V. There is no restriction on the specific model, and any existing product sold on the market can be used, but it must meet the characteristics shown in the following table.

[0045] Table 3 Low pressure self-locking valve characteristics

[0046]

[0047] Because the mechanical pressure-reducing valve 6 in the second branch pipeline is located between the high-pressure self-latching valve 5 and the low-pressure self-latching valve 7, the pressure from the high-pressure self-latching valve 5 at the inlet is reduced and adjusted to the required outlet pressure. By changing the throttling area of ​​the mechanical pressure-reducing valve 6, the flow rate and kinetic energy of the xenon gas in the pipeline are changed, creating a pressure loss between the high-pressure self-latching valve and the low-pressure self-latching valve, achieving the purpose of pressure reduction. During specific operation, the high-pressure self-latching valve is closed, the low-pressure self-latching valve is opened, and the gate valve of the mechanical pressure-reducing valve is adjusted to the fully open state according to the reduced pressure. Therefore, the second branch pipeline uses a combination of a mechanical pressure-reducing valve and a low-pressure self-latching valve to regulate the pressure of the pipeline to achieve the required pressure.

[0048] The electric proportional valve 9 in the third branch pipe is installed in parallel with the low-pressure latching valve in the second branch pipe. Its function is to adjust the cross-sectional area of ​​its valve core based on the magnitude of the received control signal or electrical signal, thereby achieving continuous pressure and flow control. Furthermore, it can adjust the output proportionally based on the received electrical signal, thereby controlling the pressure of the xenon gas in the pipe through the electrical signal, achieving continuous pressure regulation. The electric proportional valve is model PFCV-10-0.2-1. This proportional solenoid valve is powered by a voltage-controlled DC current source with a control voltage not exceeding 21VDC. The operating current is generally 0-150mA. The external electrical interface uses radiation-resistant and high-temperature-resistant FY1-2 wires, with a lead length of at least 600mm. Its performance indicators are shown in Table 4.

[0049] Table 4 Performance index of electric proportional valve

[0050] Furthermore, in order to measure the pressure in the outlet pipe flowing out of the pressure regulating module,

[0051]

[0052] The utility model is provided with a low-pressure pressure sensor 10 on the air outlet pipe connected to the output end of the low-pressure self-locking valve, which is used to measure the pressure there and compare it with the pressure measured by the high-pressure pressure sensor 3, so as to facilitate the calculation of the pressure value that the pressure regulating module can adjust in the entire device.

[0053] For the high-pressure pressure sensor 3 and the low-pressure pressure sensor 10 , both are powered by 11V to 13V, preferably 12V, and output an analog quantity of 0 to 5V.

[0054] The voltage-pressure relationship between the high-pressure pressure sensor 3 and the low-pressure pressure sensor 10 is:

[0055] P=a×V+b,

[0056] P is the pressure in MPa, V is the voltage value of the high-pressure or low-pressure pressure sensor, and a and b are the calibration coefficients of the high-pressure or low-pressure pressure sensor, which need to be configured. After measuring the voltage value of the high-pressure or low-pressure pressure sensor, the corresponding pressure value can be calculated according to the above formula.

[0057] Furthermore, a variable gas capacity module is provided on the outlet pipe where the output end of the low-pressure latching valve of the pressure regulating module is located. Preferably, the variable gas capacity module is implemented as a variable gas container 11, which is used to store incoming xenon gas and release the stored xenon gas when it is needed. The variable gas container 11 has a variable volume and is used to receive and store the xenon gas flowing out of the main outlet pipe after being regulated by the pressure regulating module. When the xenon gas is compressed in the container, the distance between the gas molecules decreases, thereby increasing the kinetic energy of the gas molecules and causing the gas pressure to rise. When the gas expands, the distance between the gas molecules increases, the kinetic energy of the gas molecules decreases, and the gas pressure decreases. Therefore, by controlling the compression and expansion of the incoming gas, the variable gas container can store the xenon gas in the variable gas container and release it when needed, thereby effectively storing and supplying the pressure-regulated xenon gas and facilitating subsequent control of the xenon gas flow rate.

[0058] Furthermore, the device further comprises a filtering module, which is connected between the variable gas capacity module and the flow control module. The filtering module is implemented by a filter 12 and is used to filter the rare gas to be output and remove impurities therein.

[0059] Furthermore, the pressure control module includes a power supply component and a control component connected to each other, such as Figure 2As shown, the power supply assembly includes at least four power conversion chips for converting the input voltage into the output voltage. The first power conversion chip among the four power conversion chips converts the input voltage into the first output voltage. The first power conversion chip adopts the isolated power conversion chip URB2428YMD-10WR3G of Jinshengyang, whose input voltage range is 9-36V, preferably 18-36V, the output voltage is 28V, and the current can reach 350mA; the second power conversion chip is connected in parallel with the first power conversion chip, for converting the input voltage into the second output voltage. The second power conversion chip adopts the isolated power conversion chip URA2412YMD-15WR3 of Jinshengyang, whose input voltage range is 9-36V, preferably 18-36 V, the output voltage is 28V, and the current can reach ±620mA; the third power conversion chip and the fourth power conversion chip are both connected to the first voltage conversion chip to convert the first output voltage into a third output voltage and a fourth output voltage respectively. The third power conversion chip adopts ADI's power conversion chip ADP7118-5.0, which has an input range of 2.7V-20V and a wide voltage input. Here, the input voltage is selected as ±12V, the output voltage is 5V, and the output current can reach 200mA; the fourth output voltage adopts ADI's power conversion chip ADP7118-3.3, which has an input range of 2.7V-20V and a wide voltage input. Here, the input voltage is selected as ±12V, the output voltage is 3.3V, and the output current can reach 200mA.

[0060] Furthermore, the control assembly of the present invention includes a pressure regulating controller, such as Figure 3 As shown, the pressure regulation controller uses the GD32F470IIH6 manufactured by GigaDevice as its controller chip. This domestically produced chip boasts a maximum clock speed of 240MHz, 2048KB of Flash memory, and 768KB of SRAM. It offers exceptional computing performance, with a maximum clock speed of 200MHz, a complete DSP instruction set, parallel computing capabilities, and a dedicated floating-point unit (FPU) to meet advanced computing needs.

[0061] The GD32F470 series integrates a wealth of innovative peripheral resources on-chip, including:

[0062] Cortex-M4 Core@240MHz

[0063] ·Support H / W DSP instructions+FPU

[0064] ·Zero-wait state execution from Flash

[0065] Flash: 2048KB

[0066] SRAM: 768KB

[0067] ·EXMC supports external SDRAM&SRAM

[0068] Up to 8x UART (9Mbit / s)

[0069] Up to 6x SPI (30Mbit / s)

[0070] Up to 3x I2C (400Kbit / s)

[0071] Up to 2x CAN2.0B

[0072] Up to 2x I2S

[0073] Support SDIO, Ethernet MAC

[0074] Support USB OTG FS+HS

[0075] ·8-14bit Camera Interface+IPA

[0076] ·LCD-TFT controller up to XGA resolution

[0077] ·Up to 3x 12bit,2.6M SPS ADCs(24chs)

[0078] Up to 2DACs

[0079] ·Standby Current@2uA.

[0080] The control chip includes RS-422 serial interface, CAN interface, LAN interface and control switch output interface, such as Figure 4 As shown, the CAN interface of the control chip is connected to the remote control terminal, which is the host computer, that is, the on-board control computer. The control chip receives and executes relevant instructions sent by the host computer; the RS-422 serial interface of the control chip is connected to the flow control module; the control chip is connected to the monitoring computer through the local area network LAN interface and the switch. The monitoring computer can be used for human-computer interaction to realize real-time monitoring and control of the device. The monitoring computer is connected to the pressure regulating controller and the proportional flow controller of the flow control module through the network port to receive and display the data of each sensor and realize the control of the switch state of the valves at each position of the pressure regulating module.

[0081] The control chip is connected to the high-pressure self-latching valve, low-pressure self-latching valve, bang-bang valve, and electromagnetic proportional valve through various control switch output interfaces to control the opening of each of the above valves. The control chip (i.e., the processor MCU) is connected to the high-pressure pressure sensor or low-pressure pressure sensor through the A / D conversion module. The high-pressure or low-pressure pressure sensor uses a 28V power supply, which is converted to 12V through DC / DC. The A / D conversion module includes the amplifier chip ADA4610 and the AD4630-16 chip, such as Figure 5 As shown, the measured pressure can be obtained according to the aforementioned voltage-pressure relationship.

[0082] Furthermore, the flow control module includes a power supply component, a proportional flow controller, a piezoelectric valve, a two-wire PT1000 temperature sensor and a displacement sensor.

[0083] Among them, the power supply components include a boost module and a power conversion module. The 150V boost module adopts the HRB series isolated wide voltage input high voltage regulated output boost module developed by Shenzhen Esoreson Company. Its input range is 18-36V, output 150V, and maximum output power can reach 40W. The ±12V output voltage chip adopts the isolated power conversion chip URA2412YMD-15WR3 of Jinshengyang, whose input voltage range is 9-36V, output voltage is 28V, and current can be ±620mA; the ±24V output voltage chip uses Jinshengyang's isolated power conversion chip URA2424YMD-15WR3, whose input voltage range is 9-36V, output voltage is ±24V, and current can reach ±310mA; the 5V and 3.3V power supply chips use ADI's power conversion chips ADP7118-5.0 and ADP7118-3.3, whose input range is 2.7V-20V wide voltage input and output current can reach 200mA. Figure 6 shown.

[0084] The proportional flow controller is used to control the micro-flow output of the gas. GD32F470IIH6 produced by GigaDevice is also selected as the controller chip. The specific performance has been described above and will not be repeated here. It includes RS-422 interface, LAN interface, power interface, temperature sensor interface, piezoelectric valve drive interface, etc. Figure 2As shown, the proportional flow controller is connected to the pressure regulating controller through the RS-422 interface, connected to the temperature sensor through the two-wire PT1000 temperature sensor interface, connected to the piezoelectric valve through the piezoelectric valve drive interface, and connected to the monitoring computer and the host computer through the LAN interface. After the host computer sends a control instruction to the proportional flow controller, the proportional flow controller collects the temperature information of the piezoelectric valve through the temperature sensor, obtains the flow rate of the rare gas in the piezoelectric valve through the collected opening information of the piezoelectric valve, compares the collected flow rate with the set flow rate, and compares the result with the predetermined threshold value again. The valve port opening of the piezoelectric valve is adjusted to adjust the flow rate so that the flow rate through the valve port is consistent with the set flow rate value, thereby performing closed-loop control.

[0085] Furthermore, a displacement sensor is connected to the pressure regulating controller via an RS-422 interface and is installed on the piezoelectric valve. When the piezoelectric valve is actuated, it measures the displacement of the measuring valve port. The pressure regulating controller uses this displacement to determine the real-time flow rate of the rare gas in the piezoelectric valve, which is then compared with the set flow rate for closed-loop control. In this case, a flow control module is not required. Therefore, the device can select one of the two closed-loop control methods described above based on actual needs.

[0086] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise.

[0087] The above description shows and describes several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the application concept described herein by the above teachings or by techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A pressure regulating control device, characterized in that: The device includes: a gas storage module, a pressure regulating module, a pressure control module and a flow control module; The gas storage module stores rare gas; The pressure regulating module is connected to the gas storage module and is used to regulate the pressure of the rare gas flowing out of the gas storage module; The pressure control module is electrically connected to the pressure regulating module and is used to regulate the pressure in the pressure regulating module; The flow control module is electrically connected to the pressure control module and is used to adjust the flow rate of the rare gas flowing out of the pressure regulating module; The pressure regulating module includes a plurality of pressure branch regulating pipelines connected in parallel.

2. The pressure regulating control device according to claim 1, characterized in that: The rare gas is xenon.

3. The pressure regulating control device according to claim 1, characterized in that: The gas storage module includes a plurality of storage tanks connected in parallel, each storage tank stores the rare gas, and each storage tank is connected through a gas outlet pipe.

4. The pressure regulating control device according to claim 1, characterized in that: There are three pressure branch regulating pipelines. The first pressure branch regulating pipeline is provided with a Bang-Bang valve; the second pressure branch regulating pipeline is provided with a high-pressure self-locking valve, a mechanical pressure reducing valve and a low-pressure self-locking valve in sequence; the third pressure branch regulating pipeline is provided with an electric proportional valve.

5. The pressure regulating control device according to claim 4, characterized in that: The device further comprises a variable gas capacity module, which is arranged between the pressure regulating module and the flow control module.

6. The pressure regulating control device according to claim 5, characterized in that: The input end of the Bang-Bang valve is arranged between the high-pressure self-locking valve and the mechanical pressure reducing valve, and the output end is arranged between the variable gas capacity module and the low-pressure self-locking valve; the input end of the electric proportional valve is arranged between the mechanical pressure reducing valve and the low-pressure self-locking valve, and the output end is arranged between the low-pressure self-locking valve and the variable gas capacity module.

7. The pressure regulating control device according to claim 5, characterized in that: The device further comprises a low-pressure sensor arranged on the gas outlet pipe between the low-pressure self-locking valve and the variable gas capacity module.

8. The pressure regulating control device according to claim 5, characterized in that: The device further includes a filter module connected between the variable gas capacity module and the flow control module.

9. The pressure regulating control device according to claim 8, characterized in that: The filtering module is a filter.

10. The pressure regulating control device according to claim 5, characterized in that: The variable gas capacity module is a variable gas container.

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