Zero-emission executing mechanism and system for high-pressure natural gas valve

Abstract

The invention relates to the field of fluid pressure execution devices, in particular to a high-pressure natural gas valve zero-discharge execution mechanism and system.The high-pressure natural gas valve zero-discharge execution mechanism comprises a valve body, a gas-liquid linkage cylinder, a natural gas pipe and a gas storage assembly, the gas-liquid linkage cylinder comprises a cylinder body, a sliding plate, a driving structure, a first valve, an exhaust valve and a discharge pipe, and the sliding plate is slidably arranged in the cylinder body; the driving structure is fixed to the sliding plate and penetrates through the cylinder body to be connected with the valve body, the first valve and the exhaust valve are arranged on the cylinder body, the exhaust pipe communicates with the exhaust valve, the gas storage shell communicates with the exhaust pipe, the partition plate is arranged in the gas storage shell in a sliding mode, the gas pump communicates with the gas storage shell, and the return pipe communicates with the gas storage shell and the natural gas pipe. And the natural gas pipe is connected with the first valve and the valve body, so that the natural gas in the gas storage shell is sent back to the natural gas pipe for use through the return pipe, and the utilization efficiency of the natural gas is improved.

Description

Technical Field

[0001] The present invention relates to the field of fluid pressure actuating devices, and particularly to a zero-emission actuator and system for high-pressure natural gas valves. Background Art

[0002] Reducing greenhouse gas emissions has become an important goal for enterprises in the energy and chemical industries. In particular, reducing methane emissions is particularly crucial, given that its potential environmental damage is 25 to 30 times that of carbon dioxide.

[0003] Currently, most gas-liquid actuators rely on natural gas as a power source to operate valves. Although this method eliminates the need for electricity, it releases a large amount of methane during the process. Specifically, such systems use natural gas in the pipeline to pressurize hydraulic oil, prompting the fork-type actuator to start the valve. However, after the valve operation is completed, the natural gas originally used for pressurization is directly discharged into the atmosphere, which is likely to cause environmental pollution. Summary of the Invention

[0004] The purpose of the present invention is to provide a zero-emission actuator and system for high-pressure natural gas valves, aiming to send the natural gas in the gas storage shell back to the natural gas pipeline for use through a return pipe, thereby avoiding the leakage of natural gas and improving the utilization efficiency of natural gas.

[0005] To achieve the above purpose, in a first aspect, the present invention provides a zero-emission actuator for high-pressure natural gas valves, including a valve body, a gas-liquid actuator cylinder, a natural gas pipeline, and a gas storage assembly. The actuator is arranged on one side of the valve body. The gas-liquid actuator cylinder includes a cylinder body, a sliding plate, a driving structure, a first valve, an exhaust valve, and a discharge pipe. The sliding plate is slidably arranged in the cylinder body. The driving structure is fixed on the sliding plate and passes through the cylinder body to be connected with the valve body. The first valve and the exhaust valve are arranged on the cylinder body. The discharge pipe is communicated with the exhaust valve. The gas storage assembly includes a gas storage shell, a gas pump, and a return pipe. The gas storage shell is communicated with the discharge pipe. A partition plate is slidably arranged in the gas storage shell. The gas pump is communicated with the gas storage shell. The return pipe is communicated with the gas storage shell and the natural gas pipeline. The natural gas pipeline is connected with the first valve and is connected with the valve body.

[0006] Wherein, the gas-liquid actuator cylinder further includes a return spring, and the return spring is arranged between the sliding plate and the cylinder body.

[0007] Wherein, the gas-liquid actuator cylinder further includes a relief valve, and the relief valve is communicated with the gas storage shell and the cylinder body.

[0008] Among them, the gas storage component further includes an activated carbon layer, and the activated carbon layer is arranged outside the gas storage shell.

[0009] Among them, the gas storage component further includes a second spring, and the second spring is arranged between the partition plate and the gas storage shell.

[0010] Among them, a first one-way valve is arranged on the reflux pipe, and a second one-way valve is arranged at the connection between the gas storage shell and the discharge pipe.

[0011] Among them, the gas storage component further includes a pressure detection unit and a first alarm unit. The pressure detection unit is used to detect the pressure value in the gas storage shell, and the first alarm unit is used to give an alarm when the pressure value is not within the set range.

[0012] In a second aspect, the present invention further provides a zero-emission actuator system for a high-pressure natural gas valve, including the zero-emission actuator for a high-pressure natural gas valve described above.

[0013] For the zero-emission actuator and system of a high-pressure natural gas valve of the present invention, the actuator is arranged on one side of the valve body to facilitate directly controlling the opening and closing actions of the valve. The sliding plate can slide freely in the cylinder body, ensuring that the driving structure can operate smoothly and precisely. The driving structure is not only fixed on the sliding plate but also passes through the cylinder body and is directly connected to the valve body, ensuring the effective transmission of force to achieve precise control of the valve state.

[0014] The first valve and the exhaust valve are both arranged on the cylinder body. The first valve is used to control the inlet and outlet of natural gas to push the sliding plate to move, so that the sliding plate can push the hydraulic liquid to push the driving structure to move to drive the valve body to open. When it is necessary to gradually reduce the opening degree of the valve body, the natural gas on one side of the sliding plate is discharged into the gas storage shell through the exhaust valve, so that the pressure on the natural gas side of the sliding plate is less than the pressure on the hydraulic liquid side, so that the sliding plate can gradually reset and reduce the opening degree of the valve body. When it is necessary for natural gas to enter the gas storage shell, the first air pump is opened to extract the air on one side of the partition plate, so that the partition plate moves to generate negative pressure, and then the exhaust valve is opened so that natural gas can enter the gas storage shell, effectively managing the recovered gas volume. Then the natural gas in the gas storage shell can be sent back to the natural gas pipe for use through the reflux pipe, thus avoiding the leakage of natural gas and improving the utilization efficiency of natural gas. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a structural diagram of a zero-emission actuator for a high-pressure natural gas valve of the present invention.

[0017] Figure 2 It is a right-side structural diagram of a zero-emission actuator for a high-pressure natural gas valve of the present invention.

[0018] Figure 3 It is a left-side structural diagram of a zero-emission actuator for a high-pressure natural gas valve of the present invention.

[0019] Figure 4 It is a sectional structural diagram of a zero-emission actuator for a high-pressure natural gas valve of the present invention.

[0020] Figure 5 It is a structural diagram of the detection component of the present invention.

[0021] Figure 6 It is a structural diagram of the leakage alarm of the present invention.

[0022] Valve body 101, gas-liquid linkage cylinder 102, natural gas pipe 103, gas storage component 104, cylinder block 105, sliding plate 106, drive structure 107, first valve 108, exhaust valve 109, discharge pipe 110, gas storage shell 111, air pump 112, return pipe 113, return spring 114, overflow valve 115, activated carbon layer 116, second spring 117, first one-way valve 118, second one-way valve 119, pressure detection unit 120, first alarm unit 121, pipeline pressure detector 122, threshold setting unit 123, valve control unit 124, pipeline pressure change data acquisition unit 125, historical data analysis unit 126, judgment unit 127, second alarm unit 128, partition plate 129. Detailed implementation manners

[0023] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0025] The first embodiment

[0026] Please refer to Figures 1 to 6 , the present invention provides a zero-emission actuator for a high-pressure natural gas valve, including a valve body 101, a gas-liquid actuator cylinder 102, a natural gas pipe 103, and a gas storage assembly 104. The actuator is arranged on one side of the valve body 101. The gas-liquid actuator cylinder 102 includes a cylinder body 105, a sliding plate 106, a driving structure 107, a first valve 108, an exhaust valve 109, and a discharge pipe 110. The sliding plate 106 is slidably arranged in the cylinder body 105. The driving structure 107 is fixed on the sliding plate 106 and passes through the cylinder body 105 to be connected with the valve body 101. The first valve 108 and the exhaust valve 109 are arranged on the cylinder body 105. The discharge pipe 110 is communicated with the exhaust valve 109. The gas storage assembly 104 includes a gas storage shell 111, a gas pump 112, and a return pipe 113. The gas storage shell 111 is communicated with the discharge pipe 110. A partition plate 129 is slidably arranged in the gas storage shell 111. The gas pump 112 is communicated with the gas storage shell 111. The return pipe 113 is communicated with the gas storage shell 111 and the natural gas pipe 103. The natural gas pipe 103 is connected with the first valve 108 and is connected with the valve body 101.

[0027] In this embodiment, the actuator is arranged on one side of the valve body 101 to facilitate directly controlling the opening and closing actions of the valve. The sliding plate 106 can slide freely in the cylinder body 105, ensuring that the driving structure 107 can operate smoothly and precisely. The driving structure 107 is not only fixed on the sliding plate 106 but also passes through the cylinder body 105 to be directly connected with the valve body 101, ensuring the effective transmission of force to achieve precise control of the valve state.

[0028] The first valve 108 and the exhaust valve 109 are both arranged on the cylinder block 105. The first valve 108 is used to control the inlet and outlet of natural gas to push the sliding plate 106 to move, so that the sliding plate 106 can push the hydraulic liquid to drive the driving structure 107 to move to drive the valve body 101 to open. When it is necessary to gradually reduce the opening degree of the valve body 101, the natural gas on one side of the sliding plate 106 is discharged into the gas storage shell 111 through the exhaust valve 109, so that the pressure on the natural gas side of the sliding plate 106 is less than the pressure on the hydraulic liquid side, so that the sliding plate 106 can be gradually reset to reduce the opening degree of the valve body 101.

[0029] Specifically, when it is necessary for natural gas to enter the gas storage shell 111, the air pump 112 is turned on to extract the air on one side of the partition plate 129, so that the partition plate 129 moves to generate negative pressure. Then the exhaust valve 109 is opened so that natural gas can enter the gas storage shell 111 to effectively manage the recovered gas volume. Then the natural gas in the gas storage shell 111 can be sent back to the natural gas pipe 103 through the return pipe 113 for use, thus avoiding the leakage of natural gas and improving the utilization efficiency of natural gas.

[0030] The gas-liquid actuating cylinder 102 further includes a return spring 114, and the return spring 114 is arranged between the sliding plate 106 and the cylinder block 105.

[0031] A return spring 114 is added inside the gas-liquid actuating cylinder 102. This return spring 114 is cleverly arranged between the sliding plate 106 and the cylinder block 105. Its function is to help the sliding plate 106 automatically return to the initial position after the driving structure 107 completes an operation, ensuring the accuracy and consistency of each operation.

[0032] The gas-liquid actuating cylinder 102 further includes a relief valve 115, and the relief valve 115 is communicated with the gas storage shell 111 and the cylinder block 105.

[0033] To further improve the safety performance of the system, a relief valve 115 is added to the gas-liquid actuating cylinder 102. The relief valve 115 is directly connected to the gas storage shell 111 and the cylinder block 105 to play a role in overpressure protection. When the internal pressure of the system exceeds the set safety value, the relief valve 115 will automatically open, and the excess pressure will be released or stored through the gas storage shell 111, avoiding damage to the system caused by excessive pressure, and ensuring that the entire actuator can operate stably and safely under various working conditions.

[0034] The gas storage assembly 104 further includes an activated carbon layer 116, and the activated carbon layer 116 is arranged outside the gas storage shell 111.

[0035] Optimization has also been carried out in the design of the gas storage component 104. Specifically, an activated carbon layer 116 is added, which is arranged outside the gas storage shell 111. If natural gas leaks, a large amount of natural gas can be adsorbed, thereby reducing the amount of leaked natural gas.

[0036] The gas storage component 104 further includes a second spring 117, and the second spring 117 is disposed between the partition plate 129 and the gas storage shell 111.

[0037] Finally, in order to better manage the operation of the partition plate 129 in the gas storage shell 111, the second spring 117 is disposed between the partition plate 129 and the gas storage shell 111. When it is necessary to discharge natural gas, the elastic force accumulated by the second spring 117 can directly drive the partition plate 129 to reset to discharge the natural gas through the pipeline.

[0038] A first one-way valve 118 is provided on the reflux pipe 113, and a second one-way valve 119 is provided at the connection between the gas storage shell 111 and the discharge pipe 110.

[0039] In the design of the reflux pipe 113 of the zero-emission actuator of the high-pressure natural gas valve, a first one-way valve 118 is added. This first one-way valve 118 is provided on the reflux pipe 113, and its main function is to ensure that the gas can only flow in one direction, that is, from the gas storage component 104 back to the natural gas pipe 103. This design can effectively prevent gas backflow and avoid untreated gas or impurities from entering the interior of the gas storage component 104 in the reverse direction, thus ensuring the cleanliness and stability of the entire system.

[0040] At the same time, a second one-way valve 119 is also installed at the connection between the gas storage shell 111 and the discharge pipe 110. The design purpose of this second one-way valve 119 is to further ensure the normal operation and safety performance of the system. It ensures that the waste gas discharged from the gas-liquid linkage cylinder 102 can only enter the gas storage shell 111 through the discharge pipe 110 for storage or treatment, and there will be no backflow phenomenon.

[0041] The gas storage component 104 further includes a pressure detection unit 120 and a first alarm unit 121. The pressure detection unit 120 is used to detect the pressure value in the gas storage shell 111, and the first alarm unit 121 is used to alarm when the pressure value is not within the set range.

[0042] The pressure detection unit 120 is installed inside the gas storage shell 111, and its main responsibility is to accurately measure and record the pressure value inside the shell. By continuously monitoring the pressure changes in the gas storage shell 111, the pressure detection unit 120 can provide key data support to help the operator understand the current working condition of the system and provide a basis for subsequent operation adjustments. This real-time monitoring mechanism is crucial for ensuring the safe storage of high-pressure natural gas and can effectively prevent potential risks caused by too high or too low pressure.

[0043] Meanwhile, the first alarm unit 121 works closely with the pressure detection unit 120 to form a complete safety warning system. When the pressure detection unit 120 monitors that the pressure value in the gas storage shell 111 deviates from the preset safety range, the first alarm unit 121 will immediately start the alarm program. This alarm unit can send alarm signals in the form of sound, light or other means to remind the on-site staff of the existing safety hazards. For example, in the case where too high pressure may cause an explosion risk or too low pressure may lead to abnormal operation of the equipment, the timely response of the first alarm unit 121 can help avoid accidents and protect the safety of personnel and the integrity of the equipment.

[0044] The zero-emission actuator of the high-pressure natural gas valve further includes a detection component, and the detection component includes a pipeline pressure detector 122, a threshold setting unit 123, and a valve control unit 124; the pipeline pressure detector 122 is used to detect the pressure data in the natural gas pipeline 103, the threshold setting unit 123 is used to set the pressure range; the valve control unit 124 is used to control the first valve 108 and the air pump 112 based on the pressure data and the pressure range. When the pressure data is lower than the pressure range, the first valve 108 is closed, and the air pump 112 is started to extract the natural gas in the cylinder body 105 into the gas storage shell 111, thereby reducing the opening degree of the valve body 101; when the pressure data is higher than the pressure range, the air pump 112 is closed, and the first valve 108 is opened to increase the natural gas pressure in the cylinder body 105, thereby pushing the sliding plate 106 to move to increase the opening degree of the valve body 101.

[0045] The pipeline pressure detector 122 is installed on the natural gas pipeline 103, and its main function is to monitor the pressure data of the natural gas in the pipeline in real time. By accurately capturing the pressure changes during the natural gas transmission process, the pipeline pressure detector 122 provides an important reference basis for subsequent operations. This real-time monitoring mechanism can effectively prevent potential safety hazards caused by abnormal pressure, ensuring the safety and stability of natural gas transportation. The threshold setting unit 123 allows users to set an ideal pressure range according to actual needs. This setting not only takes into account the best efficiency of natural gas transportation but also takes into account the safe operating limit of the equipment. The flexibility of the threshold setting unit 123 enables the system to be adjusted according to different working conditions to meet the needs of diverse application scenarios.

[0046] The valve control unit 124 is the core part of the entire detection component. It intelligently controls the actions of the first valve 108 and the air pump 112 based on the pressure data obtained from the pipeline pressure detector 122 and the pressure range determined by the threshold setting unit 123. Specifically: when the pressure data detected in the natural gas pipeline 103 is lower than the preset pressure range, the valve control unit 124 will automatically close the first valve 108 and start the air pump 112. At this time, the air pump 112 starts to extract the natural gas in the cylinder block 105 and transfer it to the gas storage shell 111. This process helps to reduce the opening degree of the valve body 101, thereby reducing the flow rate of natural gas and preventing system instability or performance degradation caused by too low pressure.

[0047] Conversely, if the pressure data is higher than the preset pressure range, the valve control unit 124 will close the air pump 112 and open the first valve 108. The purpose of this is to increase the pressure of the natural gas in the cylinder block 105, prompt the sliding plate 106 to move, and then increase the opening degree of the valve body 101, improve the flow rate of natural gas, and make the system pressure return to the normal range.

[0048] The zero-emission actuator of the high-pressure natural gas valve further includes a leakage alarm. The leakage alarm includes a pipeline pressure change data acquisition unit 125, a historical data analysis unit 126, a judgment unit 127, and a second alarm unit 128. The pipeline pressure change data acquisition unit 125 is used to acquire the pressure change rate in the pipeline;

[0049] The historical data analysis unit 126 is used to extract a normal pressure change characteristic model based on historical data;

[0050] The judgment unit 127 is used to judge whether the pressure change rate is abnormal by using the normal pressure change characteristic model;

[0051] The second alarm unit 128 is used to issue an alarm when the pressure change rate is abnormal.

[0052] The pipeline pressure change data acquisition unit 125 is responsible for real-time monitoring of the pressure change rate in the natural gas pipeline 103. By precisely measuring the minute fluctuations in the pipeline pressure, this unit can provide crucial first-hand data, laying the foundation for subsequent analysis and processing. Such high-precision pressure monitoring is crucial for early detection of potential leakage points, as even minor pressure changes may imply the existence of leakage risks.

[0053] The historical data analysis unit 126 utilizes the long-term accumulated data to construct a normal pressure change characteristic model. This model is based on past operation data and extracts the typical patterns and rules of pressure changes in the pipeline under different operating conditions. In this way, the system can better understand the pressure change characteristics under normal operating conditions and use this as a benchmark to identify abnormal situations.

[0054] Once the normal pressure change characteristic model is established, the judgment unit 127 comes into play. It uses this model to evaluate the currently acquired pressure change rate to determine whether there are any abnormalities. Specifically, if the detected pressure change rate deviates from the normal range, it indicates that there may be leakage or other problems. This method not only improves the detection accuracy but also reduces the possibility of false alarms, making the system more reliable.

[0055] Finally, when the judgment unit 127 confirms that the pressure change rate is abnormal, the second alarm unit 128 is immediately activated. The second alarm unit 128 can issue alarms in various ways, such as audible and visual alarms, SMS notifications, or network message pushes, etc., so as to quickly attract the attention of relevant personnel. This immediate response mechanism can remind the operator to take necessary measures within the shortest time, thus avoiding potential safety accidents or environmental damage.

[0056] Second Embodiment

[0057] The present invention also provides a zero-emission actuator system for high-pressure natural gas valves, including the zero-emission actuator for high-pressure natural gas valves described above.

[0058] This system also integrates the following features or functions:

[0059] Intelligent monitoring and management system: Using modern information technologies, such as Internet of Things (IoT) technology, to connect various sensors and controllers to achieve real-time data collection, remote monitoring, and automated management. This enables the operator to understand the operating status of the system anytime and anywhere and make adjustments as needed.

[0060] By collecting and analyzing data from devices such as the pressure detection unit 120 and leakage alarms, the system can predict potential fault points, arrange maintenance work in advance, reduce unexpected downtime, and improve operational efficiency.

[0061] Considering the impact of different geographical environments and climatic conditions on the equipment, the system design takes into account functions such as waterproofing, dustproofing, and corrosion resistance to ensure stable operation in various harsh environments.

[0062] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A zero-emission actuator for a high-pressure natural gas valve, comprising a valve body, wherein the actuator is arranged on one side of the valve body, and is characterized in that, it further comprises a gas-liquid linkage cylinder, a natural gas pipe, and a gas storage assembly. The gas-liquid linkage cylinder comprises a cylinder body, a sliding plate, a driving structure, a first valve, an exhaust valve, and a discharge pipe. The sliding plate is slidably arranged in the cylinder body. The driving structure is fixed on the sliding plate and passes through the cylinder body to be connected with the valve body. The first valve and the exhaust valve are arranged on the cylinder body. The discharge pipe is communicated with the exhaust valve. The gas storage assembly comprises a gas storage shell, a gas pump, and a return pipe. The gas storage shell is communicated with the discharge pipe. A partition plate is slidably arranged in the gas storage shell. The gas pump is communicated with the gas storage shell. The return pipe is communicated with the gas storage shell and the natural gas pipe. The natural gas pipe is connected with the first valve and is connected with the valve body.

2. The zero-emission actuator for a high-pressure natural gas valve according to claim 1, wherein, the gas-liquid linkage cylinder further comprises a return spring, and the return spring is arranged between the sliding plate and the cylinder body.

3. The zero-emission actuator for a high-pressure natural gas valve according to claim 2, wherein, the gas-liquid linkage cylinder further comprises an overflow valve, and the overflow valve is communicated with the gas storage shell and the cylinder body.

4. The zero-emission actuator for a high-pressure natural gas valve according to claim 3, wherein, the gas storage assembly further comprises an activated carbon layer, and the activated carbon layer is arranged on the outer side of the gas storage shell.

5. The zero-emission actuator for a high-pressure natural gas valve according to claim 4, wherein, the gas storage assembly further comprises a second spring, and the second spring is arranged between the partition plate and the gas storage shell.

6. The zero-emission actuator for a high-pressure natural gas valve according to claim 5, wherein, a first one-way valve is arranged on the return pipe, and a second one-way valve is arranged at the connection between the gas storage shell and the discharge pipe.

7. The zero-emission actuator for a high-pressure natural gas valve according to claim 6, wherein, the gas storage assembly further comprises a pressure detection unit and a first alarm unit. The pressure detection unit is used for detecting the pressure value in the gas storage shell. The first alarm unit is used for alarming when the pressure value is not within the set range.

8. A zero-emission actuator system for a high-pressure natural gas valve, characterized in that, It includes the zero-emission actuator for a high-pressure natural gas valve according to any one of claims 1 to 7.

Images