Gas supply device and gas supply method

Abstract

The invention discloses a gas supply device and a gas supply method. The gas supply method comprises the following steps: acquiring gas pressure in a gas storage tank; the gas pressure in the gas storage tank is compared with the gas use pressure to detect whether the gas pressure in the gas storage tank meets the gas use requirement or not; wherein if the gas pressure is smaller than the gas use pressure, the next step is executed; otherwise, if the gas pressure is larger than or equal to the gas using pressure, gas is supplied to the gas using end; gas is supplemented to the gas storage tank through the liquid storage tank; whether the gas pressure of the gas touch feeling after gas supply meets the gas use requirement or not is judged, and if the gas pressure is larger than or equal to the gas use pressure, gas is supplied to the gas use end; otherwise, if the gas pressure is smaller than the gas consumption pressure, continuously supplementing gas to the gas storage tank through the liquid storage tank until the gas pressure in the gas storage tank is larger than or equal to the gas consumption pressure.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and specifically relates to a gas supply device and a gas supply method. Background Art

[0002] In the existing technology, the efficiency of the gas supply system and the problem of gas waste have always been the focus of attention. Traditional gas supply methods usually lack the means to accurately monitor the pressure at different locations in the gas storage tank, and often rely on a single pressure measurement value to evaluate the pressure condition of the entire tank, which leads to the problem of inaccurate evaluation results. In addition, when the gas pressure is insufficient, how to efficiently replenish gas from the liquid storage tank and ensure that the gas pressure after replenishment meets the gas demand while avoiding gas waste caused by direct exhaust pressure relief is also an urgent problem to be solved. Therefore, a more efficient and low-waste gas supply solution is needed to improve gas utilization efficiency and reduce unnecessary gas loss. Summary of the Invention

[0003] In response to the deficiencies in the existing technology, the main purpose of this application is to provide a gas supply device and a gas supply method. This application aims to achieve efficient gas management and supply by accurately monitoring the pressure changes inside the gas storage tank, optimizing the gas replenishment process, and other measures.

[0004] To achieve the above objectives, this application provides the following technical solutions: A gas supply method, the gas supply method comprising: obtaining a theoretical gas pressure in a gas storage tank; calculating an actual available gas pressure in the gas storage tank based on the theoretical gas pressure in the gas storage tank, and comparing the calculated pressure with the gas consumption pressure to detect whether the actual available gas pressure in the gas storage tank meets the gas consumption demand; wherein, if the actual available gas pressure is less than the gas consumption pressure, executing the next step; otherwise, if the actual available gas pressure is greater than or equal to the gas consumption pressure, supplying gas to the gas consumption end; converting the information that the actual available gas pressure in the gas storage tank is less than the gas consumption pressure into an opening signal of a valve group corresponding to a liquid storage tank, and opening the corresponding valve group of the liquid storage tank based on the opening signal to transport the gas in the liquid storage tank to the gas storage tank; judging whether the actual available gas pressure in the gas storage tank after gas replenishment meets the gas consumption demand, wherein, if the actual available gas pressure is greater than or equal to the gas consumption pressure, supplying gas to the gas consumption end; otherwise, replenishing gas to the gas storage tank through the liquid storage tank until the actual available gas pressure in the gas storage tank is greater than or equal to the gas consumption pressure.

[0005] Optionally, obtaining the theoretical gas pressure in the gas storage tank includes: obtaining pressure measurement values ​​at different measurement points in the gas storage tank; and performing weighted average fusion on the pressure measurement values ​​at different measurement points in the gas storage tank.

[0006] Optionally, a weighted average fusion is performed on the pressure measurement values ​​at different measurement points in the gas storage tank based on the following formula:

[0007] in, P GM Indicates theoretical gas pressure; Indicates the gas tank Pressure measurement value of each measuring point; Indicates temperature-based and humidity For the first Pressure correction value of each measuring point; Represents dynamic weights, which are dynamically updated by the machine learning model based on historical data analysis and real-time monitoring results to reflect the optimal weight distribution under different working conditions.

[0008] Optionally, the actual available gas pressure in the gas storage tank is compared with the gas usage pressure to detect whether the actual available gas pressure in the gas storage tank meets the gas usage demand, including: obtaining the theoretical gas pressure and gas usage pressure in the gas storage tank, and obtaining real-time operating parameters; calculating the dynamic pressure loss from the gas storage tank to the gas usage end based on the obtained theoretical gas pressure, gas usage pressure and real-time operating parameters in the gas storage tank; temperature compensating the theoretical gas pressure in the gas storage tank to obtain the temperature-compensated gas pressure; calculating the actual available gas pressure based on the temperature-compensated gas pressure and the dynamic pressure loss; and comparing the actual available gas pressure with the gas usage pressure to detect whether the gas pressure in the gas storage tank meets the gas usage demand.

[0009] Optionally, the information that the actual available gas pressure in the gas storage tank is less than the gas usage pressure is converted into an opening signal of the valve group corresponding to the liquid storage tank, including: calculating the pressure difference between the actual available gas pressure in the gas storage tank and the gas usage pressure; setting a conversion function, and fuzzy processing the pressure difference between the actual available gas pressure and the gas usage pressure, the changing trend of the gas storage tank pressure and the environmental parameters.

[0010] Optionally, the method further includes: when the actual available gas pressure in the gas storage tank after gas replenishment is greater than or equal to the gas pressure, determining whether the actual available gas pressure exceeds a preset gas pressure value.

[0011] The present application also provides a gas supply device for implementing the gas supply method as described above, the gas supply device comprising: a gas storage tank and a liquid storage tank, the liquid storage tank comprising a first output end and a second output end, wherein the first output end of the liquid storage tank is connected to the first input end of the gas storage tank through a liquid storage tank gas pipeline and a liquid storage tank gas valve; the second output end of the liquid storage tank is connected to the second input end of the gas storage tank through a liquid gas pipeline, a vaporizer and a vaporized gas pipeline in sequence.

[0012] Optionally, the gas supply device further includes: a pressure regulating valve, wherein the pressure regulating valve is located between the vaporizer and the second input end of the gas storage tank.

[0013] Optionally, the gas supply device further includes: a liquid outlet valve, wherein the liquid outlet valve is located between the vaporizer and the liquid gas pipeline.

[0014] Optionally, the gas supply device further includes: a gas supply pipeline, wherein the output end of the gas supply pipeline is connected to the first input end of the liquid storage tank, and the input end of the gas supply pipeline is connected to a gas source.

[0015] This application can bring the following beneficial effects: This application provides an efficient gas supply method and device. By precisely monitoring the pressure at different locations within a gas storage tank and calculating the integrated pressure value using a weighted average fusion algorithm, this method enables accurate assessment of the gas tank pressure. This application automatically replenishes gas from a liquid storage tank when the gas pressure is insufficient, and through a series of steps ensures that the gas pressure after replenishment meets the gas demand, thereby avoiding gas waste caused by direct exhaust and pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a gas supply method provided by one embodiment of the present application; Figure 2 This is a structural schematic diagram of an air supply device provided in another embodiment of the present application.

[0017] The following are the descriptions of the reference numerals: 1. First pressure sensor; 2. Liquid storage tank gas pipeline; 3. Liquid storage tank gas valve; 4. Pressure regulating valve; 5. Gas supply pipeline; 6. Gas supply pressure regulating valve; 7. Liquid gas pipeline; 8. Liquid outlet valve; 9. Vaporizer; 10. Vaporized gas pipeline; 11. Second pressure sensor. DETAILED DESCRIPTION The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0020] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Figure 1 This is a flow chart of a gas supply method provided by an exemplary embodiment of the present application. Figure 1 As shown, the method includes the following steps: S1: Get the theoretical gas pressure in the gas tank P GM ; In this step, in order to more accurately evaluate the gas pressure condition in the gas storage tank, it is necessary to install multiple pressure sensors at different positions of the gas storage tank to detect the pressure of multiple measurement points in the gas storage tank, including but not limited to the upper, middle, lower, air inlet and air outlet of the gas storage tank. In this embodiment, the pressure measurement values ​​obtained at these measurement points are recorded as P1 (upper), P2 (middle), P3 (lower), P4 (air inlet), and P5 (air outlet). Taking into account the positional differences of the detection points and the influence of the state changes of the gas flow in the storage tank on the pressure values ​​at each point, this application designs a weighted average fusion algorithm to calculate and obtain the comprehensive pressure measurement value in the gas storage tank. P GM Since the measurement time of each measurement point is different, the pressure value of each measurement point is assigned a dynamic weight, which is recorded as 、 、 、 and , then the theoretical gas pressure in the gas tank is P GM Calculate according to the following formula:

[0022] in, P GM Indicates theoretical gas pressure; Indicates the gas tank Pressure measurement value of each measuring point; Indicates temperature-based and humidity For the first Pressure correction value of each measuring point; Represents dynamic weights, which are dynamically updated by the machine learning model based on historical data analysis and real-time monitoring results to reflect the optimal weight distribution under different working conditions.

[0023] Compared with fixed weights that cannot adapt to changes under different working conditions, this application introduces dynamic weights to automatically adjust the weights of each measurement point based on real-time monitoring data and historical data analysis, which can more accurately reflect the actual pressure distribution inside the gas storage tank, especially when working conditions change (such as changes in temperature, flow, etc.), thereby providing more accurate pressure values.

[0024] S2: Based on the theoretical gas pressure in the gas storage tank P GM Calculate the actual available gas pressure in the gas tank and the gas pressure P GR Compare to detect the actual available gas pressure in the gas tank Whether the gas demand is met; among which, if the actual available gas pressure Less than gas pressure P GR , execute step S3; otherwise, if the actual available gas pressure Greater than or equal to gas pressure P GR , then supply gas to the gas-using end; In this step, considering that there is a certain loss in the process of gas storage tank supplying gas to the gas end, the actual gas supply pressure is not equal to the theoretical gas pressure. P GM , but it is necessary to consider the loss factor in the gas supply process, specifically, the actual available gas pressure in the gas storage tank and gas pressure P GR The comparison includes the following steps: Step 1: Obtain the theoretical gas pressure in the gas tank P GM and gas pressure P GR , and obtain real-time operating parameters, such as gas instantaneous flow rate Q , pipeline resistance coefficient f , gas temperature T , Pipeline length L and pipe diameter D ; Step 2: Calculate the dynamic pressure loss from the gas storage tank to the gas consumption end based on the data obtained in step 1 :

[0025] in, represents the gas density, represents the cross-sectional area of ​​the pipe, Indicates the additional gas pressure loss (such as the gas pressure loss caused by local resistance of valves, elbows, etc.). The specific local resistance coefficient can be obtained by referring to the resistance coefficient table provided by the manufacturer in the engineering manual according to the type of pipeline accessories (such as elbows, ball valves, reducing joints, etc.). , then according to the formula Calculated, represents the gas density, Indicates the gas flow rate.

[0026] Step 3: Theoretical gas pressure in the gas tank P GM Perform temperature compensation as follows:

[0027] in, Indicates the gas pressure after temperature compensation, Indicates the reference temperature.

[0028] In this step, the gas pressure in the gas storage tank is closely related to the temperature. For example, when the temperature rises, the thermal motion of the gas molecules intensifies, causing the gas to expand and the pressure to rise; when the temperature drops, the gas contracts and the pressure drops. If the temperature factor is ignored, the dynamic pressure loss The calculated results will deviate from the actual value, especially when the operating temperature changes. This application uses temperature compensation to correct pressure measurements at different temperatures to equivalent values ​​at a standard temperature (e.g., 25°C). This facilitates accurate calculation of gas flow and avoids pressure measurement deviations caused by temperature changes. Furthermore, temperature compensation can reduce false pressure reports caused by temperature fluctuations, thereby facilitating accurate calculation of the actual available gas pressure. Step 4: Gas pressure based on temperature compensation and dynamic pressure loss Calculate the actual available gas pressure :

[0029] Step 5: Based on the actual available gas pressure and gas pressure P GR Compare to check whether the gas pressure in the gas storage tank meets the gas demand, like ( Indicates the safety margin factor, such as 5% to 10%), which indicates the theoretical gas pressure in the gas tank P GM Able to meet gas demand; like , then the theoretical gas pressure in the gas storage tank P GM Unable to meet gas demand.

[0030] This application comprehensively considers the gas pressure in the storage tank, the gas pressure at the gas user, the instantaneous flow rate, the pipeline resistance coefficient, the gas temperature, and the geometric characteristics of the pipeline to calculate the dynamic pressure loss and perform temperature compensation to ultimately obtain the actual available pressure. This application not only accurately reflects the actual pressure conditions during the entire gas transportation process from the gas storage tank to the gas user, but also introduces a safety margin factor to ensure that gas demand can be met even in the presence of measurement errors or fluctuations, thereby improving the accuracy and reliability of gas pressure assessment.

[0031] For example, this application specifically combines the following scenarios to provide an intuitive description of the above comparison process.

[0032] The specific scenario is: gas pressure in gas storage tank , gas pressure , dynamic pressure loss: , safety margin factor ; (298K); ℃(308.15K).

[0033] The tank gas pressure without temperature compensation is:

[0034] The actual available gas pressure without temperature compensation is: =

[0035] Demand pressure after safety margin:

[0036] The temperature-compensated tank gas pressure can be calculated according to the above formula:

[0037] The actual available gas pressure after temperature compensation is:

[0038] Comparison results: The actual available gas pressure without temperature compensation is greater than , which seems to meet the gas demand, but does not take into account the high pressure caused by temperature. The actual available gas pressure after temperature compensation is >105 , meeting the gas demand, but the pressure margin is significantly reduced ( Reduce to ), close to the critical value.

[0039] In summary, temperature compensation allows the system to more accurately assess the actual available pressure in gas storage tanks, avoiding misjudgments of gas supply due to ambient temperature fluctuations. In the above example, the temperature compensation mechanism significantly corrects the issue of inflated pressure in high-temperature scenarios, ensuring safe and reliable gas supply.

[0040] S3: The actual available gas pressure in the gas tank Less than gas pressure P GR The information is converted into an opening signal of the valve group corresponding to the liquid storage tank, and the corresponding valve group of the liquid storage tank is opened based on the opening signal to transport the gas in the liquid storage tank to the gas storage tank; The actual available gas pressure in the gas storage tank Less than gas pressure P GR The information is converted into an opening signal of the valve group corresponding to the liquid storage tank, including the following steps: Step 1: Calculate the actual available gas pressure in the gas tank and gas pressure P GR Pressure difference ;

[0041] Step 2: Set is the conversion function, as shown below:

[0042] in, Indicates the changing trend of gas tank pressure; Represents a set of environmental parameters, such as temperature T, humidity H, vibration, etc.; Indicates the The membership value of the fuzzy rule to the input parameter (value range 0, 1); Indicates the The output fuzzy set center value corresponding to the fuzzy rules (%); Represents the total number of fuzzy rules.

[0043] Step 3: 、 、 Perform fuzzy processing and map them into different fuzzy sets (such as "low", "medium", and "high").

[0044] Specifically, the fuzzification process is described as follows: 1. Each input parameter is divided into several fuzzy sets, defined as follows: 1.1 Pressure difference

[0045] Low: , at this time the membership drops from 1 to 0, indicating the pressure difference Small, use the left semi-trapezoidal membership function:

[0046] Medium: , at this time, the membership first increases to 1 and then decreases, indicating that the pressure difference Moderate, using triangular membership functions:

[0047] High: , at this time the membership increases from 0 to 1, indicating the pressure difference Larger, use the right semi-trapezoidal membership function:

[0048] in, Indicates the right endpoint of the low interval (i.e. the upper limit of the low interval), in the low interval , the membership degree decreases linearly from 1 to 0, indicating the pressure difference Less than or equal to When , the membership degree is 1; Indicates the left endpoint of the middle interval (that is, the lower limit of the middle interval), in the middle interval , the membership increases from 0 to 1, indicating that when the pressure difference is within this range, the membership increases gradually; Indicates the right endpoint of the middle interval (i.e. the upper limit of the middle interval), in the middle interval ,when achieve When , the membership begins to decrease; Indicates the left endpoint of the high interval (that is, the lower limit of the high interval), in the high interval , the membership degree gradually increases from 0, indicating that the pressure difference is greater than or equal to When , the membership degree gradually increases; Indicates the right endpoint of the high interval (i.e. the upper limit of the high interval), in the high interval The membership degree increases from 0 to 1, indicating that the pressure difference exceeds After that, the degree of membership gradually increases.

[0049] 1.2 Pressure change trend

[0050] Decreasing <0, the membership degree is 1; Stable: , using Gaussian membership function:

[0051] in, represents the standard deviation of the gas pressure distribution and is used to control the sensitivity to the "steady" state. Represents variance.

[0052] Increasing , the membership degree is 1.

[0053] 1.3. Environmental parameter E (taking temperature T as an example) Low temperature (Cold): , using the left semi-trapezoidal membership function; Optimal: , using triangular membership function; High temperature (Hot): , using the left semi-trapezoidal membership function.

[0054] in, Indicates the lowest temperature allowed by the system; The threshold value indicating the transition of temperature from “low” to “suitable”; The threshold value indicating the transition from "suitable" to "high" temperature; Indicates the maximum temperature allowed by the system.

[0055] In summary, through fuzzification processing, on the one hand, the system does not have to strictly require precise numerical values ​​when processing input data, but instead flexibly responds to data in different ranges by defining different fuzzy sets and their membership functions. This processing method enables the system to better adapt to the complexity and uncertainty in practical applications. On the other hand, through fuzzification, the system can process input data with certain ambiguity and uncertainty. For example, the temperature can be "high" or "close to normal" rather than just a single numerical range. Fuzzification processing enables the system to perform effective reasoning when the input is incomplete or the data is uncertain. This application converts precise input into fuzzy sets, allowing the system to respond more flexibly to various different input situations, where different membership functions (such as trapezoidal, triangular, Gaussian, etc.) can be used to model different types of fuzziness, allowing the system to adapt to different application scenarios.

[0056] Step 4: Reasoning based on predefined fuzzy rules. Examples of predefined fuzzy rules are as follows: Rule 1: If is "low", If T is "low temperature", the recommended valve opening is "greatly increased" ( ); Rule 2: If Close to "middle", If T is "stable", the valve opening is "small adjustment" ( ); Rule 3: If is "high", T is "high temperature", then the valve opening is "closed" ( ).

[0057] Step 5: Defuzzification, that is, converting the results of fuzzy reasoning into specific valve opening instructions through defuzzification methods , here we use the center of gravity method as an example:

[0058] in, Indicates the final valve opening instruction; Indicates the specific valve opening instruction; Indicates the The output fuzzy set center value corresponding to the fuzzy rule is used to calculate the final output result in the defuzzification process. represents the total number of fuzzy rules; Indicates the The membership value of the fuzzy rule to the input parameter (range 0, 1).

[0059] For example, assume that rule 1 is triggered ( , ) and Rule 2 ( , ),but:

[0060] By calculating pressure differentials, analyzing historical trends, and factoring in environmental factors, this model can more accurately determine when and how to adjust valve opening. This comprehensive approach provides more refined and precise control than simple threshold comparison methods. Furthermore, by utilizing fuzzy logic to process input parameters and adjusting membership functions based on actual conditions, the system can adapt to varying operating conditions. Whether it's short-term fluctuations or long-term trends, it can respond appropriately, enhancing the system's flexibility and robustness.

[0061] S4: Determine the actual available gas pressure in the gas storage tank after gas replenishment Whether the gas demand is met, among which, if the actual available gas pressure Greater than or equal to gas pressure P GR , then supply gas to the gas-using end; otherwise, if the actual available gas pressure Less than gas pressure P GR , the information that the gas tank pressure is less than the gas pressure is converted into an opening signal of the valve group corresponding to the liquid tank, and the corresponding valve group of the liquid tank is opened to transfer the gas in the liquid tank to the gas tank until the actual available gas pressure in the gas tank is Greater than or equal to gas pressure P GR .

[0062] S5: The actual available gas pressure in the gas storage tank after gas replenishment Greater than or equal to gas pressure P GR When the actual available gas pressure Whether the air pressure exceeds the preset value P GD .

[0063] In this step, the application determines the actual available gas pressure through the following steps: Whether the air pressure exceeds the preset value P GD .

[0064] Step 1: Build a pressure trend model and use it to predict future time windows The gas pressure value within, the pressure trend model is expressed as:

[0065] in, Indicates time The actual available gas pressure at the moment, Indicates that at the current moment The actual available gas pressure, Indicates the actual available gas pressure About Time The first derivative of , which represents the rate of change of gas pressure, is ; Indicates the actual available gas pressure About Time The second derivative of , which represents the acceleration of pressure change, is ; Indicates the time increment in units of ; Indicates the current time point.

[0066] Step 2: Based on the gas pressure value predicted by the pressure trend prediction model , construct a pressure distribution probability model, assume that the pressure fluctuation obeys Gaussian distribution, and calculate the future Actual available gas pressure Exceeding the preset value P GD The probability of pressure distribution is expressed as:

[0067] in, Indicates that the gas pressure exceeds the preset value P GD The probability of represents the predicted pressure mean, represents the standard deviation of the gas pressure distribution, and Positive correlation, is the integral variable, which represents the change in pressure. express In the predicted pressure mean and standard deviation The probability density function of .

[0068] Step 3: Compare the probability of the gas pressure exceeding the preset value with the threshold, and determine whether the gas pressure exceeds the preset value based on the comparison result.

[0069] For example, if > (Threshold, for example 5%), then determine the actual available gas pressure Exceeding the preset air pressure value P GD .

[0070] In addition, it should be noted that if the actual available gas pressure Exceeding the preset air pressure value P GD , it is necessary to adjust the valve opening on the gas supply pipeline, control the gas flow, reduce the pressure of the gas storage tank, or dynamically adjust the gas supply rate to avoid excessive pressure in the gas storage tank; otherwise, if the actual available gas pressure The air pressure does not exceed the preset value P GD , gas is directly supplied to the gas-consuming section normally to ensure the continuity and stability of gas supply.

[0071] Figure 2 An exemplary embodiment of the present application provides a gas supply device, such as Figure 2 As shown, the gas supply device includes: a gas storage tank and a liquid storage tank, the liquid storage tank includes a first output end and a second output end, wherein the first output end of the liquid storage tank is connected to the first input end of the gas storage tank through a liquid storage tank gas pipeline 2 and a liquid storage tank gas valve 3; the second output end of the liquid storage tank is connected to the second input end of the gas storage tank through a liquid gas pipeline 7, a vaporizer 9 and a vaporized gas pipeline 10 in sequence.

[0072] In another exemplary embodiment, the gas supply device further includes a pressure regulating valve 4 , and the pressure regulating valve 4 is located between the vaporizer 9 and the second input end of the gas storage tank.

[0073] In this embodiment, the primary function of pressure-regulating valve 4 is to regulate the pressure of liquid gas discharged from the liquid storage tank before entering the vaporizer. Liquid gas typically has a high pressure at low temperatures. Direct entry into the vaporizer could cause pressure fluctuations or exceed the equipment's tolerances. Pressure-regulating valve 4 dynamically adjusts valve opening to ensure that liquid gas enters the vaporizer at a stable and appropriate pressure. Furthermore, if the pressure in the liquid storage tank rises abnormally (e.g., due to changes in ambient temperature or a surge in gas replenishment demand), pressure-regulating valve 4 automatically limits flow or shuts off the flow path to prevent damage to the vaporizer and downstream pipelines due to overpressure.

[0074] In another exemplary embodiment, the gas supply device further includes a liquid outlet valve 8 , and the liquid outlet valve 8 is located between the vaporizer 9 and the liquid gas pipeline 7 .

[0075] In this embodiment, the liquid outlet valve 8 is located between the vaporizer 9 and the liquid gas pipeline 7, and its core function is to regulate the flow of the vaporized gas entering the gas storage tank. By dynamically adjusting the valve opening, the gas delivery rate is ensured to be accurately matched with the gas user demand, avoiding excessive or insufficient gas supply. In addition, the liquid outlet valve 8 is located at the output end of the vaporizer 9, which can maintain the gas pressure output by the vaporizer 9 to prevent the pressure imbalance of the gas storage tank caused by pressure fluctuations. It should be noted that the liquid outlet valve 8 is designed as a one-way valve structure, which can prevent the gas from flowing back from the gas storage tank into the vaporizer to ensure one-way flow of the system. More importantly, the liquid outlet valve 8 can be linked with the pressure regulating valve 4 to form a dual control mechanism of "front pressure regulation-back flow control", wherein the pressure regulating valve 4 is responsible for regulating the pressure of the liquid gas input to the vaporizer, while the liquid outlet valve 8 is responsible for regulating the output flow of the vaporized gas. The two work together to achieve global optimization of the gas supply process.

[0076] In another exemplary embodiment, the gas supply device further includes a gas supply pipeline 5 , the output end of the gas supply pipeline 5 is connected to the first input end of the liquid storage tank, and the input end of the gas supply pipeline 5 is connected to a gas source.

[0077] In this embodiment, the gas supply line 5 is provided with a gas supply regulating valve 6. When the pressure within the liquid storage tank fluctuates abnormally due to gas replenishment or environmental changes (such as temperature increase causing the vaporization of liquid gas), the gas supply line 5 can inject or exhaust gas to help maintain a stable pressure within the tank, avoiding the risk of overpressure or negative pressure. Furthermore, if the liquid storage tank is under-replenished or malfunctions, the gas supply line 5 can serve as a backup gas source, directly supplying gas to the gas storage tank to ensure continuous supply to the user. The gas supply regulating valve 6, located on the gas supply line 5, dynamically adjusts the valve opening to precisely control the flow of gas entering the liquid storage tank from the gas source, ensuring that the gas replenishment rate matches system requirements. For example, when the pressure in the liquid storage tank drops rapidly, the regulating valve can increase its opening to accelerate gas replenishment. Furthermore, the gas supply regulating valve 6 is linked with the pressure regulating valve 4 and the liquid outlet valve 8 to form a multi-stage control network. For example, during the gas replenishment phase, the gas supply regulating valve 6 is opened, and the external gas source directly replenishes the gas storage tank; during the gas supply stabilization phase, the gas supply regulating valve 6 fine-tunes its opening to coordinate with the gas replenishment from the liquid storage tank to reduce energy consumption.

[0078] In another exemplary embodiment, a second pressure sensor is provided on the liquid storage tank, and a first pressure sensor is provided on the gas storage tank.

[0079] In this embodiment, the first pressure sensor 1 is arranged at the key monitoring points (such as the gas inlet, gas outlet and different height positions of the storage tank) of the gas storage tank, for real-time monitoring of the pressure data of each measuring point in the gas storage tank. Through the collection of pressure data at multiple positions, combined with the weighted average fusion algorithm, the system can accurately calculate the comprehensive theoretical gas pressure of the gas storage tank, providing key input for subsequent pressure compensation, dynamic loss calculation and gas supplement decision. The high-frequency sampling capability of the first pressure sensor 1 ensures real-time capture of pressure changes, especially during rapid gas supply or gas supplement, which can timely feedback pressure fluctuations and prevent the risk of insufficient gas supply or overpressure.

[0080] The second pressure sensor 11 is arranged at the gaseous output end and the liquid output end of the liquid storage tank, for monitoring the pressure parameters of the liquid storage tank under different output states. When the liquid storage tank supplements gas to the gas storage tank, the second pressure sensor 11 detects the output pressure of the liquid storage tank in real time, ensuring that the pressure is stable within a safe range during the gas supplement process. When an abnormal pressure of the liquid storage tank is detected (such as a sharp increase in internal pressure due to an increase in ambient temperature), the system can dynamically adjust the valve opening degree of the pressure regulating valve or start the emergency pressure relief mechanism to avoid equipment damage. In addition, the data of the second pressure sensor 11 and the data of the first pressure sensor 1 are coordinated to provide environmental parameter input (such as temperature, pressure change trend) for fuzzy logic control, optimizing the gas supplement efficiency and system reliability.

[0081] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A gas supply method, characterized in that: The gas supply method comprises: Obtain theoretical gas pressure in gas storage tank; The actual available gas pressure in the gas storage tank is calculated based on the theoretical gas pressure in the gas storage tank, and compared with the gas demand pressure to detect whether the actual available gas pressure in the gas storage tank meets the gas demand; if the actual available gas pressure is less than the gas demand pressure, the next step is executed; otherwise, if the actual available gas pressure is greater than or equal to the gas demand pressure, gas is supplied to the gas demand end; Converting the information that the actual available gas pressure in the gas storage tank is less than the gas pressure into an opening signal for the valve group corresponding to the liquid storage tank, and opening the valve group corresponding to the liquid storage tank based on the opening signal to transfer the gas in the liquid storage tank to the gas storage tank; Determine whether the actual available gas pressure in the gas storage tank after gas replenishment meets the gas demand. If the actual available gas pressure is greater than or equal to the gas demand pressure, gas is supplied to the gas demand end; otherwise, gas is replenished to the gas storage tank through the liquid storage tank until the actual available gas pressure in the gas storage tank is greater than or equal to the gas demand pressure.

2. The gas supply method according to claim 1, characterized in that: The obtaining of the theoretical gas pressure in the gas storage tank comprises: Obtain pressure measurement values ​​at different measuring points in the gas storage tank; The pressure measurement values ​​at different measurement points in the gas storage tank are weighted averaged and fused.

3. The gas supply method according to claim 2, characterized in that: The pressure measurement values ​​at different measurement points in the gas storage tank are weighted averaged and fused based on the following formula: in, P GM Indicates theoretical gas pressure; Indicates the gas tank Pressure measurement value of each measuring point; Indicates temperature-based and humidity For the first Pressure correction value of each measuring point; Represents dynamic weights, which are dynamically updated by the machine learning model based on historical data analysis and real-time monitoring results to reflect the optimal weight distribution under different working conditions.

4. The gas supply method according to claim 1, characterized in that: The comparing the actual available gas pressure in the gas storage tank with the gas demand pressure to detect whether the actual available gas pressure in the gas storage tank meets the gas demand includes: Obtain theoretical gas pressure and gas pressure in gas storage tanks, as well as real-time operating parameters; Calculate the dynamic pressure loss from the gas storage tank to the gas consumption end based on the theoretical gas pressure in the gas storage tank, the gas consumption pressure, and the real-time operating parameters; Perform temperature compensation on the theoretical gas pressure in the gas storage tank to obtain the temperature-compensated gas pressure; Calculate the actual available gas pressure based on the temperature-compensated gas pressure and dynamic pressure loss; The actual available gas pressure is compared with the gas demand pressure to detect whether the gas pressure in the gas storage tank meets the gas demand.

5. The gas supply method according to claim 1, characterized in that: The information that the actual available gas pressure in the gas storage tank is less than the gas usage pressure is converted into an opening signal of the valve group corresponding to the liquid storage tank, including: Calculate the pressure difference between the actual available gas pressure and the gas pressure in the gas storage tank; The conversion function is set, and the pressure difference between the actual available gas pressure and the gas pressure, the change trend of the gas storage tank pressure and the environmental parameters are fuzzy processed.

6. The gas supply method according to claim 1, characterized in that: The method further comprises: If the actual available gas pressure in the gas storage tank after gas replenishment is greater than or equal to the gas pressure, it is determined whether the actual available gas pressure exceeds the preset gas pressure value.

7. A gas supply device for implementing the gas supply method according to any one of claims 1 to 6, characterized in that: The air supply device comprises: A gas storage tank and a liquid storage tank, wherein the liquid storage tank comprises a first output end and a second output end, wherein The first output end of the liquid storage tank is connected to the first input end of the gas storage tank through a liquid storage tank gas pipeline and a liquid storage tank gas valve; The second output end of the liquid storage tank is connected to the second input end of the gas storage tank through a liquid gas pipeline, a vaporizer and a vaporized gas pipeline in sequence.

8. The air supply device according to claim 7, characterized in that: The air supply device also includes: A pressure regulating valve, wherein the pressure regulating valve is located between the vaporizer and the second input end of the gas storage tank.

9. The air supply device according to claim 7, characterized in that: The air supply device also includes: A liquid outlet valve, wherein the liquid outlet valve is located between the vaporizer and the liquid gas pipeline.

10. The air supply device according to claim 7, characterized in that: The air supply device also includes: An air supply pipeline, wherein the output end of the air supply pipe is connected to the first input end of the liquid storage tank, and the input end of the air supply pipeline is connected to the air source.

Images