High-pressure natural gas automatic collection control system and control method thereof

Abstract

The invention relates to the technical field of petrochemical engineering, and provides a high-pressure natural gas automatic collection control system and a control method thereof. The high-pressure natural gas automatic collection control system comprises a gas receiving assembly which comprises a first gas inlet communicated with a gas pipeline and used for introducing gas to be detected; the gas adjusting assembly is connected with the gas receiving assembly, the gas adjusting assembly is used for adjusting the temperature value and the pressure value of the to-be-detected gas, the gas output assembly is connected with the gas adjusting assembly and comprises a first exhaust port, and the first exhaust port is used for being connected with a sampling container and conveying the to-be-detected gas to the sampling container; the controller is connected with the gas receiving assembly, the gas adjusting assembly and the gas output assembly; the detection assembly is connected with the controller and at least used for detecting the temperature value and the pressure value of the gas to be detected, and the controller is at least used for controlling the gas receiving assembly, the gas adjusting assembly and the gas output assembly to work according to the temperature value and the pressure value.

Description

Technical Field

[0001] This application relates to the field of petrochemical technology, and in particular to a high-pressure natural gas automatic acquisition and control system and its control method. Background Technology

[0002] Natural gas, primarily composed of methane, is a clean energy source with advantages such as high calorific value, high combustion efficiency, and low pollution. Currently, natural gas is widely used in industrial manufacturing, urban heating, and residential applications. To ensure the quality and safety of natural gas, sampling and testing are necessary.

[0003] In related technologies, there is a need for sampling of high-pressure natural gas, and the sampling process requires operators to use probe-type devices for manual sampling.

[0004] However, manual sampling operations have poor controllability. During the sampling process, probe-type devices are prone to bending or falling off, causing pipeline leakage accidents. Furthermore, in high-pressure, flammable, and highly toxic environments, operators face significant safety threats. At the same time, the sampling process and parameters of manual sampling operations are uncontrollable, making it impossible to guarantee the consistency and accuracy of the sampling data. This results in technical problems such as poor safety, high accident rate, and poor sampling accuracy in natural gas sampling operations. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a high-pressure natural gas automatic sampling and control system and its control method, which can realize automated and unmanned natural gas sampling, and solve the technical problems of poor safety and high accident rate in natural gas sampling operations.

[0006] In a first aspect, this application provides a high-pressure natural gas automatic acquisition and control system for use in a gas pipeline, in which a gas to be detected flows. The high-pressure natural gas automatic acquisition and control system includes: a gas receiving component, including a first inlet connected to the gas pipeline, for introducing the gas to be detected; a gas regulating component connected to the gas receiving component, for regulating the temperature and pressure values ​​of the gas to be detected; a gas output component connected to the gas regulating component, including a first exhaust port, for connecting to a sampling container and for delivering the gas to be detected to the sampling container; a controller connected to the gas receiving component, the gas regulating component, and the gas output component; and a detection component connected to the controller, for detecting at least the temperature and pressure values ​​of the gas to be detected, and the controller for controlling the operation of the gas receiving component, the gas regulating component, and the gas output component based on the temperature and pressure values.

[0007] Through the above technical solution, this application realizes the transformation from "manual operation" to "intelligent automatic control", which improves the automation level, safety and reliability of the equipment.

[0008] The high-pressure natural gas automatic sampling and control system proposed in this application can complete the sampling operation of the gas to be tested without the intervention of personnel, eliminating the need for manual operation of probe-type devices in related technologies. Furthermore, compared with probe-type devices in related technologies, the gas receiving component in this application only needs to be connected to the gas pipeline, without needing to be inserted into the gas pipeline, fundamentally solving the pipeline leakage problem caused by probe failure in related technologies. Simultaneously, the high-pressure natural gas automatic sampling and control system 1 proposed in this application can achieve automated and intelligent sampling, fundamentally eliminating safety hazards for operators on the one hand, and improving the controllability of the sampling process and sampling parameters on the other. This solves the technical problems of poor safety, high accident rate, and poor sampling accuracy in natural gas sampling operations existing in related technologies, thereby achieving the technical effect of improving the safety and practicality of the high-pressure natural gas automatic sampling and control system 1 and ensuring the personal safety of personnel.

[0009] In some implementations, the gas receiving assembly further includes a second air inlet for connecting to a gas storage device and for introducing inert gas from the gas storage device; the gas output assembly further includes a second exhaust port.

[0010] In some implementations, the gas receiving assembly includes a first pipeline, a first valve group, a second pipeline, and a second valve group. The first end of the first pipeline forms a first air inlet, and the first end of the second pipeline forms a second air inlet. The first pipeline and the second pipeline are connected in parallel and then connected to the gas regulating assembly. The first valve group is located in the first pipeline and is used to control the on / off state of the first pipeline. The second valve group is located in the second pipeline and is used to control the on / off state of the second pipeline.

[0011] In some implementations, the first valve group includes a first solenoid valve, a first needle valve, a first shut-off valve, and a second solenoid valve, which are connected in series in the first pipeline; the second valve group includes a third solenoid valve, a second needle valve, and a second shut-off valve, which are connected in series in the second pipeline; the detection component includes a first pressure sensor, a flow meter, and a second pressure sensor, wherein the first pressure sensor is located in the first pipeline and is used to detect the pressure value of the first pipeline, the flow meter is located in the first pipeline and is used to detect the flow rate value of the first pipeline, and the second pressure sensor is located in the second pipeline and is used to detect the pressure value of the second pipeline.

[0012] In some implementations, the gas regulating assembly includes a heater, a third pipeline, a third valve group, and a buffer container. The heater is connected to the gas detection assembly, the buffer container is connected to the gas output assembly, the third pipeline connects the heater and the buffer container, and the third valve group is located on the third pipeline to control the on / off state of the third pipeline.

[0013] In some implementations, the third valve group includes a fourth solenoid valve, a third needle valve, and a third shut-off valve, which are connected in series on a third pipeline. The detection group also includes a first temperature sensor, a second temperature sensor, a third pressure sensor, and a fourth pressure sensor. The first temperature sensor is located in the heater and is used to detect the temperature value of the heater. The second temperature sensor is located in the buffer container and is used to detect the temperature value of the buffer container. The third pressure sensor is located in the heater and is used to detect the pressure value of the heater. The fourth pressure sensor is located in the buffer container and is used to detect the pressure value of the buffer container.

[0014] In some implementations, the gas output component includes a fourth pipeline, a fourth valve group, a fifth pipeline, a fifth valve group, a sixth pipeline, and a sixth valve group. The fifth and sixth pipelines are connected in parallel and then connected to the gas regulating component through the fourth pipeline. The first end of the fifth pipeline forms the first exhaust port of the gas output component, and the first end of the sixth pipeline forms the second exhaust port of the gas output component. The fourth valve group is located on the fourth pipeline and is used to control the on / off state of the fourth pipeline. The fifth valve group is located on the fifth pipeline and is used to control the on / off state of the fifth pipeline. The sixth valve group is located on the sixth pipeline and is used to control the on / off state of the sixth pipeline.

[0015] In some implementations, the fourth valve group includes a fourth needle valve and a fourth shut-off valve, which are connected in series on the fourth pipeline; the fifth valve group includes a fifth solenoid valve, a fifth needle valve, and a sixth needle valve, which are connected in series on the fifth pipeline; the sixth valve group includes a sixth solenoid valve; the detection group also includes a fifth pressure sensor, located on the fifth pipeline, for detecting the pressure value of the fifth pipeline.

[0016] Secondly, this application provides a control method for a high-pressure natural gas automatic acquisition and control system, used to control the high-pressure natural gas automatic acquisition and control system of the first aspect. The control method for the high-pressure natural gas automatic acquisition and control system includes: based on a sampling command, controlling a gas receiving component to introduce the gas to be detected through a first gas inlet; controlling a gas regulating component to regulate the temperature and pressure values ​​of the gas to be detected; and based on the temperature value of the gas to be detected reaching a temperature threshold and the pressure value of the gas to be detected reaching a pressure threshold, controlling a gas output component to deliver the gas to be detected to a sampling container through a first exhaust port.

[0017] In the control method of the high-pressure natural gas automatic data acquisition and control system of this application, since the control method controls the high-pressure natural gas automatic data acquisition and control system of the first aspect, the same beneficial effects can be achieved. That is, it solves the technical problems of poor safety and high accident rate in natural gas sampling operations existing in related technologies, and achieves the technical effect of improving the safety and practicality of the high-pressure natural gas automatic data acquisition and control system and ensuring the personal safety of personnel. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 2 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 3 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 4 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 5 This is a structural block diagram of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 6 This is a flowchart of the control method of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application; Figure 7 This is a flowchart of the control method of the high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1-High-pressure natural gas automatic acquisition and control system; 11-Gas receiving component; 111-First gas inlet; 112-Second gas inlet; 113-First pipeline; 114-First valve group; 1141-First solenoid valve; 1142-First needle valve; 1143-First shut-off valve; 1144-Second solenoid valve; 115-Second pipeline; 116-Second valve group; 1161-Third solenoid valve; 1162-Second needle valve; 1163-Second shut-off valve; 12-Gas regulating component; 121-Heater; 122-Third pipeline; 123-Third valve group; 1231-Fourth solenoid valve; 1232-Third needle valve; 1233-Third shut-off valve; 124-Buffer container; 125-Temperature control switch; 13-Gas output component; 131-First exhaust port; 132-Second exhaust port; 133 - Fourth pipeline; 134- Fourth valve assembly; 1341- Fourth needle valve; 1342- Fourth shut-off valve; 135- Fifth pipeline; 136- Fifth valve assembly; 1361- Fifth solenoid valve; 1362- Fifth needle valve; 1363- Sixth needle valve; 137- Sixth pipeline; 138- Sixth valve assembly; 1381- Sixth solenoid valve; 14- Controller; 15- Detection component; 151- First pressure sensor; 152- Flow meter; 153- Second pressure sensor; 154- First temperature sensor; 155- Second temperature sensor; 156- Third pressure sensor; 157- Fourth pressure sensor; 158- Fifth pressure sensor; 16- Cabinet; 17- Explosion-proof touch screen; 18- First insulating joint; 19- Second insulating joint; 2- Gas pipeline; 3- Sampling container; 4- Gas storage device. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0028] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., 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 embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0031] The following is combined with Figures 1 to 7 This application will be described in detail.

[0032] Reference Figure 1 , Figure 2 and Figure 5 , Figure 1 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system 1 according to an embodiment of this application. Figure 2 This is a schematic diagram of the high-pressure natural gas automatic data acquisition and control system 1 according to an embodiment of this application. Figure 5 This is a structural block diagram of the high-pressure natural gas automatic data acquisition and control system 1 according to an embodiment of this application.

[0033] This application provides a high-pressure natural gas automatic acquisition and control system 1 for use in a gas pipeline 2, through which a gas to be detected flows. The high-pressure natural gas automatic acquisition and control system 1 includes: a gas receiving component 11, including a first inlet 111 connected to the gas pipeline 2 for introducing the gas to be detected; a gas regulating component 12 connected to the gas receiving component 11 for regulating the temperature and pressure values ​​of the gas to be detected; a gas output component 13 connected to the gas regulating component 12, including a first exhaust port 131 for connecting to a sampling container 3 and for delivering the gas to be detected to the sampling container 3; a controller 14 connected to the gas receiving component 11, the gas regulating component 12, and the gas output component 13; and a detection component 15 connected to the controller 14 for detecting at least the temperature and pressure values ​​of the gas to be detected. The controller 14 is at least used to control the operation of the gas receiving component 11, the gas regulating component 12, and the gas output component 13 based on the temperature and pressure values.

[0034] This application proposes an automatic high-pressure natural gas acquisition and control system 1 that can be applied to a gas pipeline 2, in which a gas to be detected flows. In the following embodiments of this application, the gas to be detected is high-pressure natural gas, but the actual application of the technical solution protected by this application is not limited to the acquisition of high-pressure natural gas.

[0035] The high-pressure natural gas automatic acquisition and control system 1 includes a gas receiving component 11, a gas regulating component 12, and a gas output component 13.

[0036] The gas receiving component 11 includes a first air inlet 111, which is configured to connect to a gas pipeline 2. Specifically, a bypass structure can be provided on the gas pipeline 2, and the first air inlet 111 is connected to the bypass interface. The gas receiving component 11 is connected to a gas regulating component 12. The gas receiving component 11 can change the on / off state between the first air inlet 111 and the gas regulating component 12 by switching its own state. When the first air inlet 111 and the gas receiving component 11 are connected, the gas to be detected can enter the gas receiving component 11 through the first air inlet 111 under high pressure and finally flow into the gas regulating component 12.

[0037] The gas regulating component 12 is connected to the gas receiving component 11. After the gas to be tested is introduced into the gas regulating component 12 through the first air inlet 111, the gas regulating component 12 can adjust the temperature and pressure of the gas to be tested so that the temperature and pressure of the gas to be tested are finally collected to meet the sampling requirements, so that the staff can directly test the collected gas to be tested.

[0038] The gas output component 13 is connected to the gas regulating component 12. The gas regulating component 12 can change its on / off relationship with the gas output component 13 by switching its own state. The end of the gas output component 13 includes a first exhaust port 131, which is configured to connect to the sampling container 3. When the gas regulating component 12 and the gas output component 13 are connected, the gas to be tested, whose temperature and pressure meet the sampling requirements, can enter the gas output component 13 and finally be delivered to the sampling container 3 through the first exhaust port 131. Finally, the staff can remove the sampling container 3 to complete the sampling work.

[0039] Based on this, the high-pressure natural gas automatic acquisition and control system 1 also includes a controller 14 and a detection component 15. The gas inlet component, gas regulating component 12, and gas outlet component 13 are all connected to the controller 14, and the detection component 15 is also connected to the controller 14. The detection component 15 can detect the temperature and pressure values ​​of the gas to be detected in the high-pressure natural gas automatic acquisition and control system 1, specifically at least the temperature and pressure values ​​of the gas to be detected in the gas regulating component 12. The controller 14 can control the operation of the gas receiving component 11, the gas regulating component 12, and the gas outlet component 13 through the temperature and pressure values ​​collected by the detection component 15, including controlling the on / off state of the first inlet 111 and the gas regulating component 12, controlling the gas regulating component 12 to regulate the temperature and pressure values ​​of the gas to be detected, and controlling the on / off state of the gas regulating component 12 and the first outlet 131.

[0040] In summary, the controller 14 and the detection component 15 form a real-time data acquisition and processing closed loop. Specifically, the controller 14 has multiple preset parameter thresholds for the safe sampling process (e.g., start-up pressure threshold, safe pressure upper limit, target regulating temperature, target regulating pressure, etc.). After system initialization, the controller 14 continuously monitors the readings of the detection component 15. Only when all inlet parameters (such as the initial pressure in the pipeline) meet the preset safe start-up conditions will it send a command to the gas receiving component 11 to open the sampling channel. This constitutes the first safety barrier.

[0041] Furthermore, during the sampling process, the controller 14 receives the gas temperature and pressure values ​​processed by the gas conditioning component 12 from the detection component 15 in real time, and compares these real-time data with the internally stored target conditioning values ​​(e.g., adjusting the high-pressure gas to a constant safe pressure that the sampling container can withstand). Based on the deviation value generated by the comparison (e.g., the actual pressure is higher than the target pressure), the controller 14 uses a built-in control algorithm (e.g., a PID control algorithm) to calculate and generate corresponding control signals (e.g., PWM signals) to dynamically and precisely adjust the operating power of the pressure regulating mechanism (e.g., an electronically controlled proportional pressure reducing valve) and / or temperature regulating mechanism (e.g., a semiconductor temperature controller) in the gas conditioning component 12. This is a continuous, closed-loop feedback regulation process designed to stabilize the state parameters of the sampled gas near the target value, ensuring consistent and safe gas conditions input to the sampling container 3.

[0042] In addition, the controller 14 also serves as the system's command center, controlling the start and stop of the gas receiving component 11, gas regulating component 12, and gas output component 13 according to strict timing logic to achieve coordination. For example, the control flow is as follows: first, ensure that the gas regulating component 12 is ready → then instruct the gas receiving component 11 to turn on → after the gas regulating component 12 stabilizes → then instruct the gas output component 13 to turn on and fill the sampling container 3 with gas → after reaching the predetermined sampling volume or time, close each valve group in sequence. The entire process requires no manual intervention and is automatically completed by the controller 14.

[0043] Through the above technical solution, this application realizes the transformation from "manual operation" to "intelligent automatic control", which improves the automation level, safety and reliability of the equipment.

[0044] Therefore, the high-pressure natural gas automatic acquisition and control system 1 proposed in this application can complete the acquisition of the gas to be detected without the intervention of personnel, eliminating the need for manual operation of probe-type devices for sampling in related technologies. Furthermore, compared with probe-type devices in related technologies, the gas receiving component 11 in this application only needs to be connected to the gas pipeline 2, without needing to be inserted into the gas pipeline 2, fundamentally solving the pipeline leakage problem caused by probe failure in related technologies. Simultaneously, the high-pressure natural gas automatic acquisition and control system 1 proposed in this application can achieve automated and intelligent acquisition, fundamentally eliminating safety hazards for operators on the one hand, and improving the controllability of the sampling process and sampling parameters on the other. This solves the technical problems of poor safety, high accident rate, and poor sampling accuracy in natural gas sampling operations existing in related technologies, thereby achieving the technical effect of improving the safety and practicality of the high-pressure natural gas automatic acquisition and control system 1 and ensuring the personal safety of personnel.

[0045] In some implementations, the gas receiving assembly 11 further includes a second air inlet 112, which is used to connect to the gas storage device 4 and to introduce inert gas from the gas storage device 4; the gas output assembly 13 further includes a second exhaust port 132.

[0046] In this embodiment, the gas receiving component 11 is also provided with a second air inlet 112. The gas receiving component 11 can adjust the on / off state between the second air inlet 112 and the gas regulating component 12 by switching states. The second air inlet 112 is configured to connect to the gas storage device 4, which is used to store inert gases, such as nitrogen.

[0047] Based on this, the gas output component 13 is also provided with a second exhaust port 132. The gas output component 13 can adjust the on / off state between the second exhaust port 132 and the gas regulating component 12 by switching states. The second exhaust port 132 is arranged in a safe exhaust gas emission environment.

[0048] By providing a second air inlet 112 on the gas receiving component 11 and a second exhaust port 132 on the gas output component 13, a gas purging operation can be performed before the gas collection operation. Specifically, before performing the gas collection operation, the gas receiving component 11 is first controlled to close the connection between the first air inlet 111 and the gas regulating component 12 to prevent inert gas from entering the gas pipeline 2, while the connection between the second air inlet 112 and the gas regulating component 12 is opened, allowing the inert gas stored in the gas storage device 4 to flow to the gas regulating component 12 through the second air inlet 112. Subsequently, the gas output component 13 is controlled to close the connection between the first exhaust port 131 and the gas regulating component 12 to prevent inert gas from entering the sampling container 3, while the connection between the second exhaust port 132 and the gas regulating component 12 is opened. During the inert gas flow process, the residual gas to be tested in the gas receiving component 11, gas regulating component 12 and gas output component 13 can be flushed out through the second exhaust port 132, preventing the residual gas to be tested from entering the sampling container 3 and affecting the detection results of the gas to be tested, thereby achieving the technical effect of improving the reliability of gas sampling and improving the accuracy of the detection results of the gas to be tested.

[0049] refer to Figure 1 and Figure 2 In some implementations, the gas receiving assembly 11 includes a first pipeline 113, a first valve group 114, a second pipeline 115, and a second valve group 116. The first end of the first pipeline 113 forms a first air inlet 111, and the first end of the second pipeline 115 forms a second air inlet 112. The first pipeline 113 and the second pipeline 115 are connected in parallel and then connected to the gas regulating assembly 12. The first valve group 114 is located in the first pipeline 113 and is used to control the opening and closing of the first pipeline 113. The second valve group 116 is located in the second pipeline 115 and is used to control the opening and closing of the second pipeline 115.

[0050] In this embodiment, the gas receiving assembly 11 includes a first pipe 113 and a second pipe 115. The first end of the first pipe 113 forms a first air inlet 111 and is connected to the gas pipeline 2. The first end of the second pipe 115 forms a second air inlet 112 and is connected to the gas storage device 4. The first pipe 113 and the second pipe 115 are connected in parallel and then connected to the gas regulating assembly 12.

[0051] Based on this, the gas receiving assembly 11 also includes a first valve group 114 and a second valve group 116. The first valve group 114 is disposed on the first pipeline 113 and is used to open or close the first pipeline 113. The second valve group 116 is disposed on the second pipeline 115 and is used to open or close the second pipeline 115. Furthermore, both the first valve group 114 and the second valve group 116 are connected to the controller 14, which can achieve automated control of the gas receiving assembly 11 by controlling the operation of the first valve group 114 and the second valve group 116.

[0052] Specifically, during gas collection, when the gas receiving component 11 introduces the gas to be detected through the first inlet 111, the first valve group 114 is opened and the second valve group 116 is closed. During gas purging, when the gas receiving component 11 introduces inert gas through the second inlet 112, the first valve group 114 is closed and the second valve group 116 is opened.

[0053] Therefore, the controller 14 can achieve automated collection of the gas to be detected and automated purging of residual gas with inert gas by controlling the first valve group 114 and the second valve group 116. The whole process does not require the intervention of personnel, thereby improving the automation and intelligence of the high-pressure natural gas automatic collection and control system 1, improving gas collection efficiency, and ensuring the safety of personnel.

[0054] refer to Figure 1 and Figure 2 In some implementations, the first valve group 114 includes a first solenoid valve 1141, a first needle valve 1142, a first shut-off valve 1143, and a second solenoid valve 1144, which are connected in series on the first pipeline 113; the second valve group 116 includes a third solenoid valve 1161, a second needle valve 1162, and a second shut-off valve 1163, which are connected in series on the first pipeline 113. 2. The second shut-off valve 1163 is connected in series on the second pipeline 115; the detection assembly 15 includes a first pressure sensor 151, a flow meter 152 and a second pressure sensor 153. The first pressure sensor 151 is located in the first pipeline 113 and is used to detect the pressure value of the first pipeline 113. The flow meter 152 is located in the first pipeline 113 and is used to detect the flow rate value of the first pipeline 113. The second pressure sensor 153 is located in the second pipeline 115 and is used to detect the pressure value of the second pipeline 115.

[0055] In this embodiment, the first valve group 114 includes a first needle valve 1142, a first shut-off valve 1143, and a second solenoid valve 1144, which are connected in series in the first pipeline 113. Correspondingly, the second valve group 116 includes a third solenoid valve 1161, a second needle valve 1162, and a second shut-off valve 1163, which are connected in series in the second pipeline 115.

[0056] The core function of a solenoid valve is "automatic switching," while the core function of a needle valve is "manual precise adjustment." The design that connects the two in series combines their advantages, achieving a "1+1>2" effect.

[0057] Specifically, it can combine "automatic switching" with "precise flow regulation". The solenoid valve receives instructions from the controller 14 and quickly opens or shuts off the pipeline. The needle valve is responsible for fine regulation. Once the solenoid valve is open, the flow rate through the pipeline is determined by the opening degree of the needle valve. The operator can pre-adjust the needle valve to the required precise flow rate, and all subsequent start-ups and shutdowns are automatically completed by the solenoid valve.

[0058] Furthermore, in a gas system, if the solenoid valve is opened rapidly under high pressure differential, the high-speed fluid will violently impact the valve core and seals, causing premature wear, noise, or even damage. Connecting a needle valve in series allows flow to be limited by closing the needle valve, thereby reducing the actual pressure differential across the solenoid valve. When the solenoid valve opens, the impact is significantly reduced, resulting in smoother operation and a significantly longer lifespan.

[0059] Additionally, when maintenance or replacement of the solenoid valve is required, the needle valve can be closed first to completely cut off the upstream fluid, allowing safe operation of the solenoid valve without needing to shut down the entire system's main pipeline. Similarly, if the solenoid valve malfunctions and fails to close, causing internal leakage, the needle valve can be immediately closed as an emergency manual shut-off valve to prevent continuous media leakage, thereby reducing maintenance difficulty.

[0060] On the other hand, a relatively inexpensive, smaller-diameter solenoid valve can be used, and then a needle valve can be used to adapt to and limit larger flow demands. This eliminates the need to purchase expensive, high-precision proportional control solenoid valves for flow regulation, thus reducing the cost of the high-pressure natural gas automatic data acquisition and control system 1.

[0061] The first shut-off valve 1143 and the second shut-off valve 1163 have unidirectional conduction characteristics, which can limit the flow direction of the gas to be sampled and avoid gas backflow problems, thereby improving the reliability of the high-pressure natural gas automatic acquisition and control system 1.

[0062] Based on this, a first pressure sensor 151 and a flow meter 152 are installed on the first pipeline 113. The first pressure sensor 151 can detect the pressure value of the gas to be tested entering through the first air inlet 111, thereby realizing inlet pressure monitoring. The flow meter 152 can detect the flow rate of the gas to be tested entering through the first air inlet 111. The controller 14 can realize overpressure protection based on the pressure value and can control the operation of the solenoid valve based on the flow rate value. A second pressure sensor 153 is installed on the second pipeline 115. The second pressure sensor 153 can detect the pressure value of the inert gas entering through the second air inlet 112. The controller 14 can realize overpressure protection based on this pressure value.

[0063] Therefore, the detection component 15 and the controller 14 work together to realize the automatic acquisition and automatic cleaning of high-pressure natural gas automatic acquisition and control system 1, and can also improve the reliability of operation by monitoring the status of the first pipeline 113 and the second pipeline 115.

[0064] refer to Figure 1 and Figure 2 In some implementations, the gas regulating assembly 12 includes a heater 121, a third pipeline 122, a third valve group 123, and a buffer container 124. The heater 121 is connected to the gas detection assembly 15, the buffer container 124 is connected to the gas output assembly 13, the third pipeline 122 connects the heater 121 and the buffer container 124, and the third valve group 123 is located in the third pipeline 122 and is used to control the opening and closing of the third pipeline 122.

[0065] In this embodiment, the gas regulating assembly 12 includes a heater 121, a third pipeline 122, a third valve group 123, and a buffer container 124.

[0066] The inlet of heater 121 is connected to the end of gas receiving assembly 11. The gas to be detected or inert gas can enter heater 121 through this inlet. After the gas to be detected enters heater 121, heater 121 can heat the gas to reach the temperature threshold required for sampling, thereby achieving temperature regulation of the gas to be sampled. Heater 121 is equipped with a temperature control switch 125, which can control the start and stop of heater 121 based on its temperature, thus achieving overheat protection for heater 121.

[0067] One end of the third pipe 122 is connected to the outlet of the heater 121, and the other end is connected to the inlet of the buffer container 124. A third valve assembly 123 is installed on the third pipe 122, which connects the heater 121 and the buffer container 124 in series. The third valve assembly 123 is used to control the on / off state between the heater 121 and the buffer container 124. During the heating process of the heater 121, the third valve assembly 123 is closed to prevent the gas to be detected from entering the buffer container 124 if its temperature has not reached the temperature threshold. When the temperature of the gas to be detected reaches the temperature threshold, the third valve assembly 123 is opened, and the gas to be detected enters the buffer container 124 for pressure regulation.

[0068] The buffer container 124 can buffer the high-pressure gas to be tested, reducing its pressure to the pressure threshold that meets the sampling and safety requirements, thereby achieving pressure regulation of the gas to be tested and preventing high-pressure gas from damaging the sampling container 3 or causing a high-pressure accident.

[0069] Therefore, by setting up heater 121 and sampling container 3, the temperature and pressure of the gas to be detected can be regulated, thereby achieving the technical effect of improving sampling accuracy and sampling reliability.

[0070] refer to Figure 1 and Figure 2 In some implementations, the third valve group 123 includes a fourth solenoid valve 1231, a third needle valve 1232, and a third shut-off valve 1233, which are connected in series on the third pipeline 122. The detection group also includes a first temperature sensor 154, a second temperature sensor 155, a third pressure sensor 156, and a fourth pressure sensor 157. The first temperature sensor 154 is located in the heater 121 and is used to detect the temperature value of the heater 121. The second temperature sensor 155 is located in the buffer container 124 and is used to detect the temperature value of the buffer container 124. The third pressure sensor 156 is located in the heater 121 and is used to detect the pressure value of the heater 121. The fourth pressure sensor 157 is located in the buffer container 124 and is used to detect the pressure value of the buffer container 124.

[0071] In this embodiment, the third valve group 123 includes a fourth solenoid valve 1231, a third needle valve 1232, and a third shut-off valve 1233, which are connected in series on the third pipeline 122.

[0072] The core function of a solenoid valve is "automatic switching," while the core function of a needle valve is "manual precise adjustment." The design that connects the two in series combines their advantages, achieving a "1+1>2" effect.

[0073] The solenoid valve receives instructions from the controller 14 to quickly open or close the pipeline. The needle valve is responsible for fine adjustment; once the solenoid valve is open, the flow rate through the pipeline is determined by the opening degree of the needle valve. The operator can pre-adjust the needle valve to the required precise flow rate, and all subsequent start-ups and shutdowns are automatically completed by the solenoid valve.

[0074] Furthermore, in a gas system, if the solenoid valve is opened rapidly under high pressure differential, the high-speed fluid will violently impact the valve core and seals, causing premature wear, noise, or even damage. Connecting a needle valve in series allows flow to be limited by closing the needle valve, thereby reducing the actual pressure differential across the solenoid valve. When the solenoid valve opens, the impact is significantly reduced, resulting in smoother operation and a significantly longer lifespan.

[0075] Additionally, when maintenance or replacement of the solenoid valve is required, the needle valve can be closed first to completely cut off the upstream fluid, allowing safe operation of the solenoid valve without needing to shut down the entire system's main pipeline. Similarly, if the solenoid valve malfunctions and fails to close, causing internal leakage, the needle valve can be immediately closed as an emergency manual shut-off valve to prevent continuous media leakage, thereby reducing maintenance difficulty.

[0076] On the other hand, a relatively inexpensive, smaller-diameter solenoid valve can be used, and then a needle valve can be used to adapt to and limit larger flow demands. This eliminates the need to purchase expensive, high-precision proportional control solenoid valves for flow regulation, thus reducing the cost of the high-pressure natural gas automatic data acquisition and control system 1.

[0077] The third shut-off valve 1233 has a unidirectional conduction feature, which can restrict the flow direction of the gas to be sampled and avoid gas backflow problems, thereby improving the reliability of the high-pressure natural gas automatic acquisition and control system 1.

[0078] Based on this, the heater 121 is equipped with a first temperature sensor 154 and a third pressure sensor 156. The first temperature sensor 154 can work with the controller 14 to automatically heat the gas to be detected. Specifically, when the controller 14 determines that the temperature of the gas to be detected is less than the temperature threshold based on the signal fed back by the first temperature sensor 154, it controls the heater 121 to work; when it determines that the temperature of the gas to be detected is greater than or equal to the temperature threshold, it controls the heater 121 to stop working. The third pressure sensor 156 is used to monitor the pressure value in the heater 121, thereby working with the controller 14 to realize overpressure protection. For example, when the pressure value in the heater 121 is greater than the safety threshold, it controls the gas receiving component 11 to close, preventing the gas to be detected from entering the high-pressure natural gas automatic acquisition and control system 1.

[0079] A second temperature sensor 155 and a fourth pressure sensor 157 are installed on the buffer container 124. The second temperature sensor 155 monitors the temperature value in the buffer container 124. During the depressurization process of the gas to be tested, heated to a temperature threshold, in the buffer container 124, the temperature value changes over time. During this process, the second temperature sensor 155, in conjunction with the controller 14, controls the output of the gas to be tested in the buffer container 124 to ensure that the temperature value of the gas to be tested finally entering the sampling container 3 meets the sampling requirements. The fourth pressure sensor 157 monitors the pressure value in the buffer container 124. Specifically, when the pressure value decreases to a pressure threshold, it controls the buffer container 124 to output the gas to be tested, ensuring that the pressure value of the gas to be tested finally entering the sampling container 3 meets the sampling requirements. This achieves the technical effect of improving the automation level of gas sampling and increasing sampling accuracy.

[0080] refer to Figure 1 , Figure 2 and Figure 1 In some implementations, the gas output assembly 13 includes a fourth pipe 133, a fourth valve group 134, a fifth pipe 135, a fifth valve group 136, a sixth pipe 137, and a sixth valve group 138. The fifth pipe 135 and the sixth pipe 137 are connected in parallel and then connected to the gas regulating assembly 12 through the fourth pipe 133. The first end of the fifth pipe 135 forms the first exhaust port 131 of the gas output assembly 13, and the first end of the sixth pipe 137 forms the second exhaust port 132 of the gas output assembly 13. The fourth valve group 134 is located in the fourth pipe 133 and is used to control the opening and closing of the fourth pipe 133. The fifth valve group 136 is located in the fifth pipe 135 and is used to control the opening and closing of the fifth pipe 135. The sixth valve group 138 is located in the sixth pipe 137 and is used to control the opening and closing of the sixth pipe 137.

[0081] In this embodiment, the gas receiving assembly 11 includes a fourth pipe 133, a fifth pipe 135, and a sixth pipe 137. One end of the fourth pipe 133 is connected to the outlet of the buffer container 124. The fifth pipe 135 and the sixth pipe 137 are connected in parallel and then connected to the second end of the fourth pipe 133. The first end of the fifth pipe 135 forms a first gas outlet and is connected to the sampling container 3. The first end of the sixth pipe 137 forms a second gas outlet.

[0082] Based on this, the gas receiving assembly 11 also includes a fourth valve group 134, a fifth valve group 136, and a sixth valve group 138. The fourth valve group 134 is installed on the fourth pipeline 133 and is used to open or close the fourth pipeline 133. The fifth valve group 136 is installed on the fifth pipeline 135 and is used to open or close the fifth pipeline 135. The sixth valve group 138 is installed on the sixth pipeline 137 and is used to open or close the sixth pipeline 137. Furthermore, the fourth valve group 134, the fifth valve group 136, and the sixth valve group 138 are all connected to the controller 14. The controller 14 can achieve automated control of the gas receiving assembly 11 by controlling the operation of the fourth valve group 134, the fifth valve group 136, and the sixth valve group 138.

[0083] Specifically, during the gas collection process, after the gas regulating component 12 completes the temperature and pressure regulation of the gas to be detected, it controls the fourth valve group 134 and the fifth valve group 136 to open, allowing the gas to be detected to be input into the sampling container 3 through the first exhaust port 131. During the purging process before gas collection, it controls the fourth valve group 134 and the sixth valve group 138 to open, allowing the residual gas inside the container to be detected to be blown out by inert gas through the second exhaust port 132.

[0084] Therefore, the controller 14 can achieve automated collection of the gas to be detected and automated purging of residual gas with inert gas by controlling the fourth valve group 134, the fifth valve group 136 and the sixth valve group 138. The whole process does not require the intervention of personnel, thereby improving the automation and intelligence of the high-pressure natural gas automatic collection and control system 1, improving gas collection efficiency and ensuring the safety of personnel.

[0085] refer to Figure 2 and Figure 1 In some implementations, the fourth valve group 134 includes a fourth needle valve 1341 and a fourth shut-off valve 1342, which are connected in series on the fourth pipeline 133; the fifth valve group 136 includes a fifth solenoid valve 1361, a fifth needle valve 1362, and a sixth needle valve 1363, which are connected in series on the fifth pipeline 135; the sixth valve group 138 includes a sixth solenoid valve 1381; the detection group also includes a fifth pressure sensor 158, which is located on the fifth pipeline 135 and is used to detect the pressure value of the fifth pipeline 135.

[0086] In this embodiment, the fourth valve group 134 includes a fourth needle valve 1341 and a fourth shut-off valve 1342, which are connected in series on the fourth pipeline 133. The fifth valve group 136 includes a fifth solenoid valve 1361, a fifth needle valve 1362, and a sixth needle valve 1363, which are connected in series on the fifth pipeline 135. The sixth valve group 138 includes a sixth solenoid valve 1381.

[0087] The core function of a solenoid valve is "automatic switching," while the core function of a needle valve is "manual precise adjustment." The design that connects the two in series combines their advantages, achieving a "1+1>2" effect.

[0088] Specifically, it can combine "automatic switching" with "precise flow regulation". The solenoid valve receives instructions from the controller 14 and quickly opens or shuts off the pipeline. The needle valve is responsible for fine regulation. Once the solenoid valve is open, the flow rate through the pipeline is determined by the opening degree of the needle valve. The operator can pre-adjust the needle valve to the required precise flow rate, and all subsequent start-ups and shutdowns are automatically completed by the solenoid valve.

[0089] Furthermore, in a gas system, if the solenoid valve is opened rapidly under high pressure differential, the high-speed fluid will violently impact the valve core and seals, causing premature wear, noise, or even damage. Connecting a needle valve in series allows flow to be limited by closing the needle valve, thereby reducing the actual pressure differential across the solenoid valve. When the solenoid valve opens, the impact is significantly reduced, resulting in smoother operation and a significantly longer lifespan.

[0090] Additionally, when maintenance or replacement of the solenoid valve is required, the needle valve can be closed first to completely cut off the upstream fluid, allowing safe operation of the solenoid valve without needing to shut down the entire system's main pipeline. Similarly, if the solenoid valve malfunctions and fails to close, causing internal leakage, the needle valve can be immediately closed as an emergency manual shut-off valve to prevent continuous media leakage, thereby reducing maintenance difficulty.

[0091] On the other hand, a relatively inexpensive, smaller-diameter solenoid valve can be used, and then a needle valve can be used to adapt to and limit larger flow demands. This eliminates the need to purchase expensive, high-precision proportional control solenoid valves for flow regulation, thus reducing the cost of the high-pressure natural gas automatic data acquisition and control system 1.

[0092] The fourth shut-off valve 1342 has a unidirectional conduction feature, which can restrict the flow direction of the gas to be sampled and avoid gas backflow problems, thereby improving the reliability of the high-pressure natural gas automatic acquisition and control system 1.

[0093] Based on this, a fifth pressure sensor 158 is installed on the fifth pipeline 135. The fifth pressure sensor 158 is used to detect the output pressure of the high-pressure natural gas automatic acquisition and control system 1, so as to ensure that the pressure value of the gas to be detected output to the sampling container 3 meets the sampling requirements and achieves the technical effect of improving the sampling accuracy.

[0094] Specifically, a first insulating joint 18 is provided between the first air inlet 111 and the first valve group 114, and a second insulating joint 19 is provided between the second air inlet 112 and the second valve group 116.

[0095] refer to Figure 2 and Figure 5 , Figure 1 This is a schematic diagram of the structure of the high-pressure natural gas automatic data acquisition and control system 1 according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the high-pressure natural gas automatic acquisition and control system 1 according to an embodiment of this application. The high-pressure natural gas automatic acquisition and control system 1 also includes a cabinet 16. The gas receiving component 11, the gas regulating component 12 and the gas output component 13 are disposed inside the cabinet 16. The controller 14 is disposed on the back of the cabinet 16. An explosion-proof touch screen 17 is also disposed on the back of the cabinet 16. The operator can control the operation of the high-pressure natural gas automatic acquisition and control system 1 through the explosion-proof touch screen 17.

[0096] Specifically, the valve assembly, heater 121, and buffer container 124 in this application are all high-pressure components that can operate normally under high-pressure conditions.

[0097] The detection component 15 can record and transmit pressure and temperature data at a specified location in real time to the control room.

[0098] When the temperature or heating time inside heater 121 reaches the set value, heater 121 can be automatically turned off.

[0099] When the pressure or inflation time inside the buffer container 124 reaches the set value, the first valve group 114 can be automatically closed to prevent over-filling.

[0100] The valve assembly, heater 121, and buffer container 124 can all be remotely controlled from the control room, eliminating the need for on-site operation during sampling.

[0101] Secondly, this application provides a control method for a high-pressure natural gas automatic data acquisition and control system, used to control the high-pressure natural gas automatic data acquisition and control system of the first aspect, with reference to... Figure 3 , Figure 4 This is a flowchart of a control method for a high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application. The control method for the high-pressure natural gas automatic data acquisition and control system includes: Step 602: Based on the sampling command, obtain the initial pressure value of the gas to be detected in the gas pipeline; Step 604: When the initial pressure value is within the preset safe start-up pressure range, control the gas receiving component to introduce the gas to be detected through the first air inlet; Step 606: Control the gas conditioning component to adjust the temperature and pressure values ​​of the gas to be detected, and obtain the real-time temperature and pressure values ​​of the gas to be detected in the gas conditioning component. Step 608: Control the gas regulating component to work based on the real-time temperature value, real-time pressure value, temperature threshold and pressure threshold, so that the real-time temperature value approaches the temperature threshold and the real-time pressure value approaches the pressure threshold. Step 610: Based on the fact that the temperature value of the gas to be detected reaches the temperature threshold and the pressure value of the gas to be detected reaches the pressure threshold, and the duration of these conditions reaches the preset duration, the gas output component is controlled to deliver the gas to be detected to the sampling container through the first exhaust port.

[0102] In this embodiment, a control method for controlling the operation of the high-pressure natural gas automatic acquisition and control system in any of the above embodiments is proposed. Therefore, this control method has the advantages of the high-pressure natural gas automatic acquisition and control system in any of the above technical solutions, and can achieve the technical effects that the high-pressure natural gas automatic acquisition and control system in any of the above embodiments can achieve. To avoid repetition, it will not be described again here.

[0103] The specific control process is as follows: After receiving the sampling command, the controller powers on and initializes, acquiring the initial pressure value of the gas to be detected in the gas pipeline through the pressure sensor in the detection component. The controller compares this initial pressure value with the internally stored safe start-up pressure range (e.g., 4.0 MPa to 25.0 MPa). If the initial pressure value is not within this range, the controller sends an alarm signal to the human-machine interface and terminates the sampling process to ensure that the system does not start under dangerous overpressure or underpressure conditions.

[0104] If the initial pressure value is normal, the controller controls the gas receiving component to open the first air inlet, and the high-pressure gas to be tested enters the system.

[0105] When the gas flows through the gas conditioning component, the controller controls the gas conditioning component to work. During this process, the controller continuously acquires the real-time pressure and temperature values ​​of the gas to be detected, which are located in the gas conditioning component, from the feedback of the detection component.

[0106] The real-time pressure and temperature values ​​are compared with preset pressure thresholds (e.g., 0.8 MPa) and temperature thresholds (e.g., 25°C) to calculate the deviation value (e). Based on the deviation value (e), a built-in control algorithm (e.g., PID control algorithm) is used to calculate the control quantity and generate a corresponding control signal (e.g., PWM signal), thereby dynamically adjusting the working state of the gas regulating component. For example, if the real-time pressure is higher than the target pressure. This "acquisition-comparison-adjustment" cycle continues, forming a closed-loop negative feedback control system, ultimately stabilizing the parameters of the output gas to be detected within the allowable error range.

[0107] When the controller determines that the real-time pressure and temperature values ​​have remained stable within the target range for a preset duration (e.g., 5 seconds), it indicates that the state of the gas to be tested meets the sampling requirements. At this point, the controller controls the gas output component to open the first exhaust port and begin filling the sampling container with stable, standard-state gas.

[0108] Therefore, the high-pressure natural gas automatic acquisition and control system proposed in this application can complete the gas sampling operation without operator intervention, eliminating the need for manual operation of probe-type devices in related technologies. Furthermore, compared to probe-type devices in related technologies, the gas receiving component in this application only needs to be connected to the gas pipeline, eliminating the need to probe into the pipeline and fundamentally solving the pipeline leakage problem caused by probe failure in related technologies. Simultaneously, the high-pressure natural gas automatic acquisition and control system proposed in this application can achieve automated and intelligent acquisition, fundamentally eliminating safety hazards for operators and improving the controllability of the sampling process and sampling parameters. This solves the technical problems of poor safety, high accident rate, and poor sampling accuracy in natural gas sampling operations in related technologies, thereby improving the safety and practicality of the high-pressure natural gas automatic acquisition and control system and ensuring the personal safety of operators.

[0109] In some implementations, the gas receiving assembly further includes a second air inlet, and the gas output assembly further includes a second exhaust port. Before the step of controlling the gas receiving assembly to open the first air inlet, refer to... Figure 3 , Figure 4 Figure 6 Figure 6 Figure 7 Figure 7 This is a flowchart of a control method for a high-pressure natural gas automatic data acquisition and control system according to an embodiment of this application. The control method includes: Step 702: Control the gas receiving assembly to introduce inert gas through the second air inlet; Step 704: Control the gas output component to exhaust gas through the second exhaust port; Step 706: Based on the sampling command, obtain the initial pressure value of the gas to be detected in the gas pipeline; Step 708: When the initial pressure value is within the preset safe start-up pressure range, control the gas receiving component to introduce the gas to be detected through the first air inlet; Step 710: Control the gas conditioning component to adjust the temperature and pressure values ​​of the gas to be detected, and obtain the real-time temperature and pressure values ​​of the gas to be detected in the gas conditioning component. Step 712: Control the gas regulating component to work based on the real-time temperature value, real-time pressure value, temperature threshold and pressure threshold, so that the real-time temperature value approaches the temperature threshold and the real-time pressure value approaches the pressure threshold. Step 714: Based on the fact that the temperature value of the gas to be detected reaches the temperature threshold and the pressure value of the gas to be detected reaches the pressure threshold, and the duration of the condition reaches the preset duration, the gas output component is controlled to deliver the gas to be detected to the sampling container through the first exhaust port.

[0110] In this embodiment, before the gas sampling operation, in order to ensure that there is no residual air in the system and to prevent the formation of an explosive mixture, the controller may first execute a purging procedure.

[0111] Specifically, the first valve group is closed and the second valve group is opened, allowing the inert gas to enter the gas regulating component through the second pipeline. During the flow of the inert gas, the residual gas will be moved.

[0112] Subsequently, the third, fourth, and sixth valve groups are opened, allowing the inert gas to purge the residual gas through the second exhaust port, thereby completing the pre-sampling purging operation. This prevents residual gas from entering the sampling container and affecting the detection results, thus improving the reliability of gas sampling and increasing the accuracy of the detection results.

[0113] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure natural gas automatic acquisition and control system for use in a gas pipeline, wherein a gas to be detected flows through the gas pipeline, characterized in that, The high-pressure natural gas automatic acquisition and control system includes: A gas receiving component includes a first air inlet connected to the gas pipeline for introducing the gas to be detected. A gas conditioning component is connected to the gas receiving component, and the gas conditioning component is used to adjust the temperature and pressure values ​​of the gas to be detected. A gas output component, connected to the gas regulating component, includes a first exhaust port, which is used to connect to a sampling container and to deliver the gas to be detected to the sampling container; The controller is connected to the gas receiving component, the gas regulating component, and the gas output component; A detection component, connected to the controller, is used at least to detect the temperature and pressure values ​​of the gas to be detected. The controller is used at least to control the operation of the gas receiving component, the gas regulating component, and the gas output component based on the temperature and pressure values.

2. The high-pressure natural gas automatic data acquisition and control system as described in claim 1, characterized in that, The gas receiving assembly further includes a second air inlet, which is used to connect to a gas storage device and to introduce inert gas from the gas storage device. The gas output assembly also includes a second exhaust port.

3. The high-pressure natural gas automatic data acquisition and control system as described in claim 2, characterized in that, The gas receiving assembly includes a first pipeline, a first valve group, a second pipeline, and a second valve group. The first end of the first pipeline forms the first air inlet, and the first end of the second pipeline forms the second air inlet. The first pipeline and the second pipeline are connected in parallel and then connected to the gas regulating assembly. The first valve group is located on the first pipeline and is used to control the on / off state of the first pipeline. The second valve group is located on the second pipeline and is used to control the on / off state of the second pipeline.

4. The high-pressure natural gas automatic data acquisition and control system as described in claim 3, characterized in that, The first valve group includes a first solenoid valve, a first needle valve, a first shut-off valve, and a second solenoid valve, wherein the first solenoid valve, the first needle valve, the first shut-off valve, and the second solenoid valve are connected in series on the first pipeline. The second valve group includes a third solenoid valve, a second needle valve, and a second shut-off valve, wherein the third solenoid valve, the second needle valve, and the second shut-off valve are connected in series on the second pipeline; The detection component includes a first pressure sensor, a flow meter, and a second pressure sensor. The first pressure sensor is located in the first pipeline and is used to detect the pressure value of the first pipeline. The flow meter is located in the first pipeline and is used to detect the flow rate of the first pipeline. The second pressure sensor is located in the second pipeline and is used to detect the pressure value of the second pipeline.

5. The high-pressure natural gas automatic data acquisition and control system as described in claim 1, characterized in that, The gas regulating assembly includes a heater, a third pipeline, a third valve group, and a buffer container. The heater is connected to the gas detection assembly, the buffer container is connected to the gas output assembly, the third pipeline connects the heater and the buffer container, and the third valve group is located on the third pipeline for controlling the on / off state of the third pipeline.

6. The high-pressure natural gas automatic data acquisition and control system as described in claim 5, characterized in that, The third valve group includes a fourth solenoid valve, a third needle valve, and a third shut-off valve, wherein the fourth solenoid valve, the third needle valve, and the third shut-off valve are connected in series on the third pipeline; The detection group further includes a first temperature sensor, a second temperature sensor, a third pressure sensor, and a fourth pressure sensor. The first temperature sensor is located in the heater and is used to detect the temperature value of the heater. The second temperature sensor is located in the buffer container and is used to detect the temperature value of the buffer container. The third pressure sensor is located in the heater and is used to detect the pressure value of the heater. The fourth pressure sensor is located in the buffer container and is used to detect the pressure value of the buffer container.

7. The high-pressure natural gas automatic data acquisition and control system as described in claim 2, characterized in that, The gas output assembly includes a fourth pipeline, a fourth valve group, a fifth pipeline, a fifth valve group, a sixth pipeline, and a sixth valve group. The fifth pipeline and the sixth pipeline are connected in parallel and then connected to the gas regulating assembly through the fourth pipeline. The first end of the fifth pipeline forms the first exhaust port of the gas output assembly, and the first end of the sixth pipeline forms the second exhaust port of the gas output assembly. The fourth valve group is located on the fourth pipeline and is used to control the on / off state of the fourth pipeline. The fifth valve group is located on the fifth pipeline and is used to control the on / off state of the fifth pipeline. The sixth valve group is located on the sixth pipeline and is used to control the on / off state of the sixth pipeline.

8. The high-pressure natural gas automatic data acquisition and control system as described in claim 7, characterized in that, The fourth valve group includes a fourth needle valve and a fourth shut-off valve, which are connected in series on the fourth pipeline; The fifth valve group includes a fifth solenoid valve, a fifth needle valve, and a sixth needle valve, wherein the fifth solenoid valve, the fifth needle valve, and the sixth needle valve are connected in series on the fifth pipeline; the sixth valve group includes a sixth solenoid valve; The detection group also includes a fifth pressure sensor, which is located in the fifth pipeline and is used to detect the pressure value of the fifth pipeline.

9. A control method for a high-pressure natural gas automatic data acquisition and control system, used to control the high-pressure natural gas automatic data acquisition and control system as described in any one of claims 1 to 8, characterized in that, include: Based on the sampling command, the initial pressure value of the gas to be detected in the gas pipeline is obtained; When the initial pressure value is within the preset safe start-up pressure range, the control gas receiving component introduces the gas to be detected through the first air inlet; The gas regulating component is controlled to adjust the temperature and pressure values ​​of the gas to be detected, and the real-time temperature and pressure values ​​of the gas to be detected in the gas regulating component are obtained. The gas regulating component is controlled to operate based on the real-time temperature value, real-time pressure value, temperature threshold, and pressure threshold, so that the real-time temperature value approaches the temperature threshold and the real-time pressure value approaches the pressure threshold. Based on the fact that the temperature value of the gas to be detected reaches the temperature threshold and the pressure value of the gas to be detected reaches the pressure threshold, and the duration of these conditions reaches the preset duration, the gas output component is controlled to deliver the gas to be detected to the sampling container through the first exhaust port.

10. The control method of the high-pressure natural gas automatic data acquisition and control system as described in claim 9, characterized in that, The gas receiving component further includes a second air inlet, and the gas output component further includes a second exhaust port. Before the step of controlling the gas receiving component to introduce the gas to be detected through the first air inlet, the control method further includes: The gas receiving assembly is controlled to introduce inert gas through the second air inlet; The gas output component is controlled to exhaust gas through the second exhaust port.

Images