Leakage monitoring and emergency cut-off system for high-pressure gas conveying pipeline

Abstract

The invention belongs to the technical field of gas conveying monitoring, and particularly relates to a high-pressure gas conveying pipeline leakage monitoring and emergency cut-off system which comprises a main conveying pipeline, an auxiliary conveying pipeline, a main valve body and a pressure sensor. Two ends of a cavity formed between the auxiliary conveying pipeline and the main conveying pipeline are communicated through an external connecting pipeline; the pressure sensor is used for detecting the pressure in a cavity formed between the auxiliary conveying pipeline and the main conveying pipeline; the pressure value monitoring instrument is used for monitoring the pressure value change speed of the pressure sensor, storing the pressure value change speed and transmitting the pressure value change speed to the controller; after it is detected that the pressure value of the pressure sensor is increased, the controller can control the main valve bodies at the two ends of the section of main conveying pipeline to be closed at the first time, and then the pressure value monitoring instrument is matched for monitoring the increasing speed of the pressure value of the pressure sensor; and the controller controls the alarm intensity of the alarm instrument according to the change speed of the pressure value fed back by the pressure value monitoring instrument.

Description

Technical Field

[0001] The invention belongs to the technical field of gas transmission monitoring, in particular to a leakage monitoring and emergency cutting system for a high-pressure gas transmission pipeline. Background Art

[0002] In the process of high-pressure pipeline transportation of flammable, explosive, toxic and harmful gases, timely detection of leakage is an essential safety guarantee. Once a serious leakage occurs, explosions, toxic gas injuries and other serious accidents that endanger social groups may occur. Therefore, the high-pressure pipeline transportation system for flammable, explosive, toxic and harmful gases must be equipped with rigorous leakage monitoring and emergency cut-off related modules to ensure the safety of high-pressure pipeline transportation of flammable, explosive, toxic and harmful gases.

[0003] There are already some existing technical means for leak monitoring: such as a high-pressure gas transmission pipeline described in the patent document with patent application number 2021222157119, in which a first gas flow meter and a second gas flow meter are respectively installed at the head and tail of the pipeline body to monitor the gas flow passing through the head and tail ends and displayed and observed through a display. When the numerical error is large, the pipeline body leaks and it is determined that maintenance is required. As can be seen from the above, in this scheme, the leakage is determined by comparing the difference between the two flow meters at the head and tail of the pipeline body. When the leakage is small, the leakage signal cannot be captured quickly, and the alarm sensitivity is poor. At the same time, the speed of the leakage cannot be displayed when the alarm is triggered, which makes maintenance more difficult. Moreover, it is difficult to further design a solution to determine the leakage point based on this solution, which has great limitations. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes a high-pressure gas pipeline leakage monitoring and emergency shut-off system. The present invention is mainly used to solve the problem that the existing high-pressure gas pipeline system cannot accurately capture the leakage signal, and cannot display the speed of the leakage when the alarm is issued, thereby increasing the difficulty of maintenance.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the present invention provides a high-pressure gas transmission pipeline leakage monitoring and emergency shut-off system, including a main transmission pipeline, an auxiliary transmission pipeline, a main valve body and a pressure sensor; the main valve body is arranged at both ends of each section of the transmission pipeline; the main valve body is used to control the on and off of the main transmission pipeline; the main valve body is connected to the controller through an electrical signal; the auxiliary transmission pipeline is sleeved on the main transmission pipeline; the two ends of the cavity formed between the auxiliary transmission pipeline and the main transmission pipeline are connected through an external connecting pipeline; the pressure sensor is used to detect the pressure in the cavity formed between the auxiliary transmission pipeline and the main transmission pipeline; the pressure sensor is electrically connected to a pressure value monitoring instrument, the pressure value monitoring instrument is used to monitor the pressure value change speed of the pressure sensor, and the pressure value monitoring instrument saves the pressure value change speed and transmits it to the controller; the controller is electrically connected to an alarm instrument.

[0006] In this case, the double-layer pipeline structure is formed by the main pipeline and the auxiliary pipeline. Since the pressure of the high-pressure gas transported in the main pipeline is relatively high, the pressure in the auxiliary pipeline increases in a short time when leaking. Then, the pressure sensor detects the increase in pressure value and determines that the main pipeline has leaked. Therefore, as long as the main pipeline leaks, no matter how large or small the leakage is, the pressure in the auxiliary pipeline will increase. The size of the leakage will only affect the speed of pressure change. Therefore, the scheme can effectively monitor leaks of different degrees, thereby providing safer protection for the pipeline. After detecting the increase in the pressure value of the pressure sensor, the controller will immediately control the main valve bodies at both ends of the main pipeline to close. Then, the pressure value monitoring instrument is used to monitor the speed of the pressure value increase of the pressure sensor. Then, the controller controls the alarm intensity of the alarm instrument according to the speed of change of the pressure value fed back by the pressure value monitoring instrument. Different colors or different sounds can be used to distinguish the speed of change of the pressure value. Then, the maintenance personnel can determine the speed of the leak according to the different alarm intensities displayed by the alarm instrument, and provide scheme guidance for subsequent maintenance work. The double-layer pipe itself can prevent the spread of harmful gases, which is safer.

[0007] Preferably, the pipeline system also includes a circulation pump, a protective gas source, an air intake control valve, an air outlet control valve, a gas processing component and a radiator; the protective gas in the protective gas source is introduced into the connecting pipe through the air intake control valve, and the protective gas entering the connecting pipe then passes through the radiator and the circulation pump in sequence, and then the protective gas passing through the circulation pump and the radiator passes through the cavity formed between the auxiliary delivery pipe and the main delivery pipe, and the protective gas coming out of the cavity is discharged into the gas processing component through the air outlet control valve; the circulation pump, the air intake control valve, the air outlet control valve, the gas processing component and the radiator are all connected to the electrical signal of the controller.

[0008] In this case, a circulating pump, a protective gas source, an air intake control valve, an air outlet control valve, a gas processing component and a radiator are added on the basis of the above structure; after a leak occurs, the pressure value of the pressure sensor increases. When the pressure value monitoring instrument detects that the pressure value of the pressure sensor is stable, the controller controls the air intake control valve to open, and then the protective gas in the protective gas source is passed into the connecting pipe. The protective gas entering the connecting pipe is cooled by the radiator. The cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; the protective gas after the heat dissipation and cooling treatment of the radiator is driven by the circulating pump to enter the cavity formed between the auxiliary delivery pipeline and the main delivery pipeline, and then the flammable and explosive gas and other harmful gases leaking from the main delivery pipeline into the cavity between the auxiliary delivery pipeline and the main delivery pipeline are isolated and diluted, thereby reducing the harm caused by the leak; the leaked gas diluted by the protective gas is discharged to the gas processing component through the air outlet control valve, thereby realizing the treatment of the harmful gas leaked in the main delivery pipeline, so that the maintenance personnel can repair or replace the pipeline at the leak in a safe environment in a timely manner.

[0009] Preferably, the pipeline system also includes a gas detection sensor and a timer; the gas detection sensor and the timer are electrically connected to the sensor signal; the gas detection sensor is arranged at the outlet of the gas outlet control valve, and the gas detection sensor is used to detect the gas transported in the main delivery pipeline.

[0010] In this case, a gas detection sensor is set at the outlet of the gas outlet control valve and used in conjunction with a timer; the timer starts timing from the beginning of the introduction of protective gas to the end of the timing when the gas detection sensor detects the leaked gas, and then the approximate location of the leak point can be calculated according to the timing duration of the timer. The specific calculation formula is:

[0011] L = (V circulation pump * t timing + V leakage * t timing) / (S auxiliary delivery pipeline - S main delivery pipeline)

[0012] L: The distance between the leak point and the gas detection sensor;

[0013] V circulation pump: the displacement of the circulation pump;

[0014] V leakage: The leakage displacement of the leak point determined by comparing the value of the pressure monitoring instrument with a large amount of experience;

[0015] t timing: the timing duration of the timer;

[0016] S Auxiliary delivery pipeline: the inner diameter cross-sectional area of ​​the auxiliary delivery pipeline;

[0017] S Main delivery pipeline: the outer diameter cross-sectional area of ​​the main delivery pipeline;

[0018] This allows maintenance personnel to find the leak point more quickly for repair or replacement, thereby improving maintenance efficiency. At the same time, the use of gas detection sensors can also accurately ensure that the harmful gas in the auxiliary transmission pipeline is completely discharged, thereby ensuring safety during maintenance.

[0019] Preferably, an overflow control valve is provided in the connecting pipeline; the pressure relief outlet of the overflow control valve is connected to the pipeline between the air outlet control valve and the gas detection sensor; the overflow control valve is connected to the controller via an electrical signal.

[0020] When the overflow control valve is opened instantly, it indicates that a large leak has occurred in the main delivery pipeline. In this case, an overflow control valve is arranged in the connecting pipeline, and the pressure relief outlet of the overflow control valve is connected to the gas processing component, so that the main and auxiliary delivery pipelines can be directly pressure-relieved without waiting for the pressure value of the pressure sensor to stabilize, thereby preventing the pressure in the cavity between the auxiliary delivery pipeline and the main delivery pipeline from being too high instantly, thereby preventing the spread of harmful gases due to leakage in the auxiliary delivery pipeline, thereby making the pipeline system safer.

[0021] Preferably, a concentric support frame is arranged between the main conveying pipeline and the auxiliary conveying pipeline; the concentric support frame is used to provide mutual supporting force between the main conveying pipeline and the auxiliary conveying pipeline.

[0022] In this case, a concentric support frame is set between the main conveying pipeline and the auxiliary conveying pipeline, so that the auxiliary conveying pipeline supports and protects the main conveying pipeline, such as in the case of bumps and squeezing; and it is beneficial for the cold air in the auxiliary conveying pipeline to evenly cool the main conveying pipeline when the auxiliary conveying pipeline is exhausted, thereby ensuring that the active state of the conveying gas in the main conveying pipeline is consistent, thereby improving the safety during the transportation process; at the same time, because the cross-section of the flow channel between the main conveying pipeline and the auxiliary conveying pipeline is similar, the leaked gas has less obstruction and squeezing when it is discharged through the auxiliary conveying pipeline, resulting in a smaller diffusion degree in the auxiliary conveying pipeline, thereby making the calculation of the leakage point more accurate.

[0023] Preferably, three clamping grooves are axially arranged on the inner wall of the auxiliary conveying pipe; a wavy elastic sheet is arranged in the clamping groove; all the wave crests on one side of the wavy elastic sheet are provided with a clamping structure, all the clamping structures are clamped in the clamping groove, and all the wave crests on the other side of the wavy elastic sheet are in contact with the outer wall of the main conveying pipe; the three wavy elastic sheets together constitute the concentric support frame.

[0024] In the present case, the snap-in groove can be a trapezoidal groove or a dovetail groove. This structure facilitates the installation and replacement of the wavy elastic sheet, and thus facilitates maintenance and can better ensure maintenance efficiency. Three wavy elastic sheets are arranged along the axial direction to minimize the resistance and extrusion of the leaked gas when passing through the auxiliary delivery pipeline. Therefore, the concentric support frame of this structure can minimize the disturbance of the leaked gas flowing in the auxiliary delivery pipeline, thereby improving the accuracy of calculating the leakage point.

[0025] Preferably, a large-displacement control valve is provided between the shielding gas source and the connecting pipeline; the large-displacement control valve is electrically signal-connected to the controller.

[0026] In this case, a large-displacement control valve is set in parallel with the air intake control valve. After the delivery pipeline is repaired or replaced, the large-displacement control valve is also opened while the air outlet control valve and the air intake control valve are opened through the controller, so that the amount of shielding gas supplied by the shielding gas source is greater than the displacement of the circulation pump. After starting the circulation pump, a part of the shielding gas is used to discharge the impurity gas in the auxiliary delivery pipeline, and the other part of the excess shielding gas is used to discharge the impurity gas in the connecting pipeline between the shielding gas source and the air outlet control valve, thereby ensuring that the shielding gas is circulated in the entire pipeline system, thereby ensuring the safety of the pipeline system.

[0027] Preferably, the pipeline system also includes a convenient guidance module; the convenient guidance module includes a control unit, an input unit, a record list, a leakage comparison unit, a selection comparison unit and a solution demonstration unit; the control unit is used for the logical operation of the entire convenient guidance module; the input unit is used to input other technical parameters except the leakage rate in each leakage event, and the technical parameters input from the input unit each time are saved in the record list, and at the same time, the control unit retrieves and records the leakage rate obtained by the pressure value monitoring instrument through the controller; the maintenance personnel's maintenance plan for each leakage event is also saved in the record list through the input unit; the leakage comparison unit is used to compare the leakage rate data called by the control unit with the existing leakage rate data saved in the record list; the selection comparison unit is used to compare the other technical parameters input by the input unit except the leakage rate with the existing other technical parameters saved in the record list; the solution demonstration unit is used to demonstrate the existing maintenance plan saved in the record list determined after comparison and screening by the leakage comparison unit and the selection comparison unit.

[0028] When a leakage event occurs, the control unit retrieves the leakage rate obtained by the pressure value monitoring instrument through the controller (the leakage rate depends on the size of the gap at the leakage point, that is, the leakage displacement, and the leakage displacement of the leakage point can be determined based on the value of the pressure value monitoring instrument and a large amount of experience). The leakage comparison unit compares the leakage rate data called by the control unit with the existing leakage rate data stored in the record list, thereby narrowing the selection range of maintenance plans. Subsequently, the selection and comparison unit compares the other technical parameters except the leakage rate input by the input unit with the other existing technical parameters stored in the record list, thereby screening and determining the maintenance plan that is consistent with the leakage event. Finally, the solution demonstration unit demonstrates the existing maintenance plan stored in the record list that has been screened and determined, thereby facilitating maintenance personnel to quickly and effectively handle leakage events. At the same time, the accuracy of maintenance is also guaranteed through standardized maintenance processes, thereby ensuring that the pipeline system can operate efficiently and stably.

[0029] When encountering a leakage rate or other technical parameters that the pipeline system cannot find, the control unit will automatically pop up an input unit to request maintenance personnel to enter other technical parameters and maintenance plans, and retrieve and record the leakage rate obtained by the pressure value monitoring instrument through the controller, thereby ensuring that the technical parameters and maintenance plans related to each leakage event are recorded, so that the pipeline system can continuously update its ability to handle leakage events, thereby continuously enhancing the efficiency of leak handling.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. The present invention forms a double-layer delivery pipeline structure through the main delivery pipeline and the auxiliary delivery pipeline. Since the pressure of the high-pressure gas delivered in the main delivery pipeline is relatively high, the pressure in the auxiliary delivery pipeline increases in a short time when leaking. Then, the pressure sensor detects that the pressure value increases and determines that the main delivery pipeline has leaked. Therefore, as long as the main delivery pipeline leaks, no matter how large or small the leakage is, the pressure in the auxiliary delivery pipeline will increase. The size of the leakage will only affect the speed of pressure change. Therefore, the scheme can effectively monitor leakage of different degrees, thereby providing safer protection for the delivery pipeline; after detecting that the pressure value of the pressure sensor increases, the controller will immediately control the main valve bodies at both ends of the main delivery pipeline to close; and then cooperate with the pressure value monitoring instrument to monitor the speed of increase of the pressure value of the pressure sensor, and then the controller controls the alarm intensity of the alarm instrument according to the size of the change speed of the pressure value fed back by the pressure value monitoring instrument, which can be different colors or different sounds to distinguish the size of the change speed of the pressure value, and then the maintenance personnel can determine the speed of the leakage according to the different alarm intensities displayed by the alarm instrument, and provide scheme guidance for subsequent maintenance work; the double-layer pipe itself can prevent the spread of harmful gases, which is safer.

[0032] 2. In the present invention, a circulation pump, a protective gas source, an air intake control valve, an air outlet control valve, a gas processing component and a radiator are added on the basis of the above structure; after a leak occurs, the pressure value of the pressure sensor increases, and when the pressure value monitoring instrument detects that the pressure value of the pressure sensor is stable, the controller controls the air intake control valve to open, and then the protective gas in the protective gas source is passed into the connecting pipe, and the protective gas entering the connecting pipe is cooled by the radiator. The cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; the heat dissipation and cooling treatment by the radiator The protective gas is then driven by a circulation pump to enter the cavity formed between the auxiliary delivery pipeline and the main delivery pipeline, thereby isolating and diluting harmful gases such as flammable and explosive gases leaking from the main delivery pipeline into the cavity between the auxiliary delivery pipeline and the main delivery pipeline, thereby reducing the harm caused by the leakage; the leaked gas diluted by the protective gas is then discharged to the gas processing component through the gas outlet control valve, thereby realizing the treatment of the harmful gas leaked in the main delivery pipeline, thereby enabling maintenance personnel to promptly repair or replace the pipeline at the leaking location in a safe environment.

[0033] 3. In the present invention, a gas detection sensor is arranged at the outlet of the gas outlet control valve and used in conjunction with a timer; the timer starts timing when the protective gas is introduced and ends timing when the gas detection sensor detects the leaked gas, and then the approximate location of the leak point can be calculated by the timing duration of the timer, so that maintenance personnel can find the leak point more quickly for maintenance or replacement, thereby improving maintenance efficiency. At the same time, the use of the gas detection sensor can also accurately ensure whether the harmful gas in the auxiliary delivery pipeline is completely discharged, thereby ensuring safety during maintenance.

[0034] 4. In the present invention, when a leakage event occurs, the control unit retrieves the leakage rate obtained by the pressure value monitoring instrument through the controller, and the leakage comparison unit compares the leakage rate data called by the control unit with the existing leakage rate data saved in the record list, thereby narrowing down the selection range of maintenance plans. Subsequently, the selection and comparison unit compares the other technical parameters except the leakage rate input by the input unit with the other existing technical parameters saved in the record list, thereby screening and determining the maintenance plan that is consistent with the leakage event, and finally the solution demonstration unit demonstrates the existing maintenance plan saved in the record list that has been screened and determined, thereby facilitating maintenance personnel to quickly and effectively handle the leakage event. At the same time, the accuracy of the maintenance is also guaranteed through the standardized maintenance process, thereby ensuring that the pipeline system can operate efficiently and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a schematic diagram of the overall structure of the high-pressure gas transmission pipeline system of the present invention;

[0037] Figure 2 It is a connection schematic diagram of the concentric support frame in the present invention;

[0038] Figure 3 yes Figure 2 Rotated section view in the AA direction;

[0039] Figure 4 It is a structural block diagram of the convenient guidance module in the present invention;

[0040] In the figure: main conveying pipeline 1, auxiliary conveying pipeline 11, clamping groove 111, main valve body 12, concentric support frame 13, wavy elastic sheet 131, connecting pipeline 2, pressure sensor 21, pressure value monitoring instrument 22, circulating pump 31, protective gas source 32, air inlet control valve 33, air outlet control valve 34, gas processing component 35, radiator 36, gas detection sensor 37, overflow control valve 38, large displacement control valve 39.

[0041] Specific implementation method

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0043] like Figure 1 As shown, a high-pressure gas pipeline leakage monitoring and emergency shut-off system comprises a main delivery pipeline 1, an auxiliary delivery pipeline 11, a main valve body 12 and a pressure sensor 21; the main valve body 12 is provided at both ends of each delivery pipeline; the main valve body 12 is used to control the on and off of the main delivery pipeline 1; the main valve body 12 is connected to the controller through electrical signals; the auxiliary delivery pipeline 11 is sleeved on the main delivery pipeline 1; the two ends of the cavity formed between the auxiliary delivery pipeline 11 and the main delivery pipeline 1 are connected through an external connecting pipeline 2; the pressure sensor 21 is used to detect the pressure in the cavity formed between the auxiliary delivery pipeline 11 and the main delivery pipeline 1; the pressure sensor 21 is electrically connected to a pressure value monitoring instrument 22, and the pressure value monitoring instrument 22 is used to monitor the pressure value change speed of the pressure sensor 21, and the pressure value monitoring instrument 22 saves and transmits the pressure value change speed to the controller; the controller is electrically connected to an alarm instrument.

[0044] In this case, a double-layer delivery pipeline structure is formed by the main delivery pipeline 1 and the auxiliary delivery pipeline 11. Since the pressure of the high-pressure gas delivered in the main delivery pipeline 1 is relatively high, the pressure in the auxiliary delivery pipeline 11 increases in a short time when a leak occurs. Then, the pressure sensor 21 detects the increase in pressure value and determines that a leak has occurred in the main delivery pipeline 1. Therefore, as long as a leak occurs in the main delivery pipeline 1, no matter how large or small the leak is, the pressure in the auxiliary delivery pipeline 11 will increase. The size of the leak will only affect the speed of the pressure change. Therefore, the adoption of this solution can effectively monitor leaks of different degrees, thereby providing safer protection for the delivery pipeline; when the pressure sensor 21 detects the increase in pressure value, the pressure sensor 21 detects the increase in pressure value and determines that a leak has occurred in the main delivery pipeline 1. After the pressure value of the sensor 21 increases, the controller will immediately control the main valve bodies 12 at both ends of the main delivery pipeline 1 to close; and then cooperate with the pressure value monitoring instrument 22 to monitor the speed of increase of the pressure value of the pressure sensor 21, and then the controller controls the alarm intensity of the alarm instrument according to the magnitude of the speed of change of the pressure value fed back by the pressure value monitoring instrument 22, which can be different colors or different sounds to distinguish the magnitude of the speed of change of the pressure value, and then the maintenance personnel can determine the speed of the leakage according to the different alarm intensities displayed by the alarm instrument, and provide solution guidance for subsequent maintenance work; the double-layer pipe itself can prevent the diffusion of harmful gases, which is safer.

[0045] like Figure 1As shown, the pipeline system also includes a circulation pump 31, a protective gas source 32, an air intake control valve 33, an air outlet control valve 34, a gas processing component 35 and a radiator 36; the protective gas in the protective gas source 32 is passed into the connecting pipe 2 through the air intake control valve 33, and the protective gas entering the connecting pipe 2 then passes through the radiator 36 and the circulation pump 31 in sequence, and then the protective gas passing through the circulation pump 31 and the radiator 36 passes through the cavity formed between the auxiliary delivery pipe 11 and the main delivery pipe 1, and the protective gas coming out of the cavity is discharged into the gas processing component 35 through the air outlet control valve 34; the circulation pump 31, the air intake control valve 33, the air outlet control valve 34, the gas processing component 35 and the radiator 36 are all connected to the controller electrical signal.

[0046] In this case, a circulation pump 31, a protective gas source 32, an air intake control valve 33, an air outlet control valve 34, a gas processing component 35 and a radiator 36 are added on the basis of the above structure; after leakage occurs, the pressure value of the pressure sensor 21 increases, and when the pressure value monitoring instrument 22 detects that the pressure value of the pressure sensor 21 is stable, the controller controls the air intake control valve 33 to open, and then the protective gas in the protective gas source 32 is passed into the connecting pipe 2, and the protective gas entering the connecting pipe 2 is cooled by the radiator 36. The cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; after passing through the radiator 36, the protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion. The protective gas after heat dissipation and cooling treatment is then driven by the circulation pump 31 to enter the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1, thereby isolating and diluting harmful gases such as flammable and explosive gases leaking from the main conveying pipeline 1 into the cavity between the auxiliary conveying pipeline 11 and the main conveying pipeline 1, thereby reducing the harm caused by the leakage; the leaked gas diluted by the protective gas is then discharged into the gas processing component 35 through the gas outlet control valve 34, thereby realizing the treatment of the harmful gas leaked in the main conveying pipeline 1, so that maintenance personnel can promptly repair or replace the pipeline at the leaking location in a safe environment.

[0047] like Figure 1 As shown, the pipeline system also includes a gas detection sensor 37 and a timer; the gas detection sensor 37 and the timer are electrically connected to the sensor signal; the gas detection sensor 37 is arranged at the outlet of the gas outlet control valve 34, and the gas detection sensor 37 is used to detect the gas transported in the main transport pipeline 1.

[0048] In this case, a gas detection sensor 37 is arranged at the outlet of the gas outlet control valve 34 and used in conjunction with a timer; the timer starts timing from the beginning of the introduction of the protective gas to the end of the timing when the gas detection sensor 37 detects the leaked gas, and then the approximate position of the leak point can be calculated according to the timing duration of the timer. The specific calculation formula is:

[0049] L = (V circulation pump * t timing + V leakage * t timing) / (S auxiliary delivery pipeline - S main delivery pipeline)

[0050] L: The distance between the leak point and the gas detection sensor;

[0051] V circulation pump: the displacement of the circulation pump;

[0052] V leakage: The leakage displacement of the leak point determined by comparing the value of the pressure monitoring instrument with a large amount of experience;

[0053] t timing: the timing duration of the timer;

[0054] S Auxiliary delivery pipeline: the inner diameter cross-sectional area of ​​the auxiliary delivery pipeline;

[0055] S Main delivery pipeline: the outer diameter cross-sectional area of ​​the main delivery pipeline;

[0056] This allows maintenance personnel to more quickly find the leak point for maintenance or replacement, thereby improving maintenance efficiency. At the same time, the gas detection sensor 37 can also accurately ensure whether the harmful gas in the auxiliary delivery pipeline 11 is completely discharged, thereby ensuring safety during maintenance.

[0057] like Figure 1 As shown, an overflow control valve 38 is arranged in the connecting pipe 2; the pressure relief outlet of the overflow control valve 38 is connected to the pipeline between the air outlet control valve 34 and the gas detection sensor 37; the overflow control valve 38 is connected to the controller through an electrical signal.

[0058] When the overflow control valve 38 is instantly opened, it indicates that a large leakage has occurred in the main delivery pipeline 1. In this case, an overflow control valve 38 is arranged in the connecting pipeline 2, and the pressure relief outlet of the overflow control valve 38 is connected to the gas processing component 35, so that the main delivery and auxiliary delivery pipelines 11 can be directly pressure-relieved without waiting for the pressure value of the pressure sensor 21 to stabilize, thereby preventing the pressure in the cavity between the auxiliary delivery pipeline 11 and the main delivery pipeline 1 from being instantly too high, and preventing the leakage of the auxiliary delivery pipeline 11 from causing the spread of harmful gases and causing harm, thereby making the pipeline system safer.

[0059] like Figure 2 and 3As shown, a concentric support frame 13 is arranged between the main conveying pipeline 1 and the auxiliary conveying pipeline 11 ; the concentric support frame 13 is used to provide mutual supporting force between the main conveying pipeline 1 and the auxiliary conveying pipeline 11 .

[0060] In the present case, a concentric support frame 13 is arranged between the main conveying pipeline 1 and the auxiliary conveying pipeline 11, so that the auxiliary conveying pipeline 11 supports and protects the main conveying pipeline 1, for example, in case of bumps, squeezing, etc.; and it is beneficial for the cold air in the auxiliary conveying pipeline 11 to evenly cool the main conveying pipeline 1 when the auxiliary conveying pipeline 11 is exhausted, thereby ensuring that the active state of the conveying gas in the main conveying pipeline 1 is consistent, thereby improving the safety during the conveying process; at the same time, because the cross-section of the flow channel between the main conveying pipeline 1 and the auxiliary conveying pipeline 11 is similar, the leaked gas has less obstruction and squeezing when it is discharged through the auxiliary conveying pipeline 11, so that its diffusion degree is smaller in the auxiliary conveying pipeline 11, thereby making the calculation of the leakage point more accurate.

[0061] like Figure 2 and 3 As shown, three clamping grooves 111 are axially arranged on the inner wall of the auxiliary conveying pipe 11; a wavy elastic sheet 131 is arranged in the clamping groove 111; all the wave crests on one side of the wavy elastic sheet 131 are provided with a clamping structure, all the clamping structures are clamped in the clamping groove 111, and all the wave crests on the other side of the wavy elastic sheet 131 are in contact with the outer wall of the main conveying pipe 1; the three wavy elastic sheets 131 together constitute the concentric support frame 13.

[0062] In the present case, the snap-in groove 111 can be a trapezoidal groove or a dovetail groove. This structure facilitates the installation and replacement of the wavy elastic sheet 131, thereby facilitating maintenance and better ensuring maintenance efficiency. Three wavy elastic sheets 131 are arranged axially to minimize the resistance and extrusion of the leaked gas when passing through the auxiliary delivery pipeline 11. Therefore, the concentric support frame 13 of this structure can minimize the disturbance of the leaked gas flowing in the auxiliary delivery pipeline 11, thereby improving the accuracy of calculating the leakage point.

[0063] like Figure 1 As shown, a large-displacement control valve 39 is provided between the protective gas source 32 and the connecting pipeline 2; the large-displacement control valve 39 is electrically connected to the controller.

[0064] In the present case, a large-displacement control valve 39 is arranged in parallel with the air intake control valve 33. After the delivery pipeline is repaired or replaced, the large-displacement control valve 39 is also opened while the air outlet control valve 34 and the air intake control valve 33 are opened by the controller, so that the amount of shielding gas supplied by the shielding gas source 32 is greater than the displacement of the circulation pump 31. After starting the circulation pump 31, a part of the shielding gas is used to discharge the impurity gas in the auxiliary delivery pipeline 11, and the other part of the excess shielding gas is used to discharge the impurity gas in the connecting pipeline 2 between the shielding gas source 32 and the air outlet control valve 34, thereby ensuring that the shielding gas is circulated in the entire pipeline system, thereby ensuring the safety of the pipeline system.

[0065] like Figure 4 As shown, the pipeline system also includes a convenient guidance module; the convenient guidance module includes a control unit, an input unit, a record list, a leakage comparison unit, a selection comparison unit and a solution demonstration unit; the control unit is used for the logical operation of the entire convenient guidance module; the input unit is used to input other technical parameters except the leakage rate in each leakage event, and the technical parameters input from the input unit each time are saved in the record list, and at the same time, the control unit retrieves and records the leakage rate obtained by the pressure value monitoring instrument 22 through the controller; the maintenance personnel's maintenance plan for each leakage event is also saved in the record list through the input unit; the leakage comparison unit is used to compare the leakage rate data called by the control unit with the existing leakage rate data saved in the record list; the selection comparison unit is used to compare the other technical parameters input by the input unit except the leakage rate with the existing other technical parameters saved in the record list; the solution demonstration unit is used to demonstrate the existing maintenance plan saved in the record list determined after comparison and screening by the leakage comparison unit and the selection comparison unit.

[0066] When a leakage event occurs, the control unit retrieves the leakage rate obtained by the pressure value monitoring instrument 22 through the controller (the leakage rate depends on the size of the gap at the leakage point, that is, the leakage displacement, and the leakage displacement of the leakage point can be determined based on the value of the pressure value monitoring instrument 22 and a large amount of experience). The leakage comparison unit compares the leakage rate data called by the control unit with the existing leakage rate data stored in the record list, thereby narrowing the selection range of maintenance plans. Subsequently, the selection and comparison unit compares the other technical parameters except the leakage rate input by the input unit with the other existing technical parameters stored in the record list, thereby screening and determining the maintenance plan that is consistent with the current leakage event, and finally, the solution demonstration unit demonstrates the existing maintenance plan stored in the record list that has been screened and determined, thereby facilitating maintenance personnel to quickly and effectively deal with leakage events. At the same time, the accuracy of maintenance is also guaranteed through standardized maintenance processes, thereby ensuring that the pipeline system can operate efficiently and stably.

[0067] When encountering a leakage rate or other technical parameters that the pipeline system cannot find, the control unit will automatically pop up an input unit to request the maintenance personnel to enter other technical parameters and maintenance plans, and retrieve and record the leakage rate obtained by the pressure value monitoring instrument 22 through the controller, thereby ensuring that the technical parameters and maintenance plans related to each leakage event are recorded, so that the pipeline system can continuously update its ability to handle leakage events, thereby continuously enhancing the efficiency of leak handling.

[0068] During operation, the pressure value of the pressure sensor 21 increases after a leakage occurs. When the pressure value monitoring instrument 22 detects that the pressure value of the pressure sensor 21 is stable, the controller controls the air intake control valve 33 to open, and then the protective gas in the protective gas source 32 is passed into the connecting pipe 2. The protective gas entering the connecting pipe 2 is then cooled by the radiator 36. The cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; the protective gas after the heat dissipation and cooling treatment of the radiator 36 is then driven by the circulating pump 31 to enter the cavity formed between the auxiliary conveying pipe 11 and the main conveying pipe 1, and then the flammable and explosive gas and other harmful gases leaking from the main conveying pipe 1 into the cavity between the auxiliary conveying pipe 11 and the main conveying pipe 1 are isolated and diluted, thereby reducing the harm caused by the leakage.

[0069] When a leakage event occurs, the control unit retrieves the leakage rate obtained by the pressure value monitoring instrument 22 through the controller (the leakage rate depends on the size of the gap at the leakage point, that is, the leakage displacement, and the leakage displacement of the leakage point can be determined based on the value of the pressure value monitoring instrument 22 and a large amount of experience). The leakage comparison unit compares the leakage rate data called by the control unit with the existing leakage rate data stored in the record list, thereby narrowing the selection range of maintenance plans. Subsequently, the selection and comparison unit compares the other technical parameters except the leakage rate input by the input unit with the other existing technical parameters stored in the record list, thereby screening and determining the maintenance plan that is consistent with the current leakage event, and finally, the solution demonstration unit demonstrates the existing maintenance plan stored in the record list that has been screened and determined, thereby facilitating maintenance personnel to quickly and effectively deal with leakage events. At the same time, the accuracy of maintenance is also guaranteed through standardized maintenance processes, thereby ensuring that the pipeline system can operate efficiently and stably.

[0070] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A high-pressure gas transmission pipeline leakage monitoring and emergency shut-off system, characterized in that: The invention comprises a main delivery pipeline (1), an auxiliary delivery pipeline (11), a main valve body (12) and a pressure sensor (21); the main valve body (12) is arranged at both ends of each delivery pipeline; the main valve body (12) is used to control the on and off of the main delivery pipeline (1); the main valve body (12) is connected to a controller via an electrical signal; the auxiliary delivery pipeline (11) is sleeved on the main delivery pipeline (1); the two ends of the cavity formed between the auxiliary delivery pipeline (11) and the main delivery pipeline (1) are connected via an external connection pipeline (2); the pressure sensor (21) is used to detect the pressure in the cavity formed between the auxiliary delivery pipeline (11) and the main delivery pipeline (1); the pressure sensor (21) is electrically connected to a pressure value monitoring instrument (22), the pressure value monitoring instrument (22) is used to monitor the pressure value change speed of the pressure sensor (21), and the pressure value monitoring instrument (22) stores and transmits the pressure value change speed to the controller; the controller is electrically connected to an alarm instrument.

2. A high-pressure gas pipeline leakage monitoring and emergency shut-off system according to claim 1, characterized in that: The invention also comprises a circulation pump (31), a protective gas source (32), an air intake control valve (33), an air outlet control valve (34), a gas processing component (35) and a radiator (36); the protective gas in the protective gas source (32) is introduced into the connecting pipe (2) through the air intake control valve (33); the protective gas entering the connecting pipe (2) then passes through the radiator (36) and the circulation pump (31) in sequence; then the protective gas passing through the circulation pump (31) and the radiator (36) passes through a cavity formed between the auxiliary delivery pipe (11) and the main delivery pipe (1); the protective gas coming out of the cavity is discharged into the gas processing component (35) through the air outlet control valve (34); the circulation pump (31), the air intake control valve (33), the air outlet control valve (34), the gas processing component (35) and the radiator (36) are all connected to the controller by electrical signals.

3. A high-pressure gas pipeline leakage monitoring and emergency shut-off system according to claim 2, characterized in that: It also includes a gas detection sensor (37) and a timer; the gas detection sensor (37) and the timer are connected to the sensor electrical signal; the gas detection sensor (37) is arranged at the outlet of the gas outlet control valve (34), and the gas detection sensor (37) is used to detect the gas transported in the main transport pipeline (1).

4. A high-pressure gas pipeline leakage monitoring and emergency shut-off system according to claim 3, characterized in that: An overflow control valve (38) is provided in the connecting pipeline (2); a pressure relief outlet of the overflow control valve (38) is connected to a pipeline between the gas outlet control valve (34) and the gas detection sensor (37); and the overflow control valve (38) is connected to the controller via an electrical signal.

5. A high-pressure gas pipeline leakage monitoring and emergency shut-off system according to claim 4, characterized in that: A concentric support frame (13) is arranged between the main conveying pipeline (1) and the auxiliary conveying pipeline (11); the concentric support frame (13) is used to provide mutual supporting force between the main conveying pipeline (1) and the auxiliary conveying pipeline (11).

6. A high-pressure gas transmission pipeline leakage monitoring and emergency shut-off system according to claim 5, characterized in that: Three clamping grooves (111) are axially arranged on the inner wall of the auxiliary conveying pipeline (11); a wavy elastic sheet (131) is arranged in the clamping groove (111); all wave crests on one side of the wavy elastic sheet (131) are provided with a clamping structure, and all the clamping structures are clamped in the clamping groove (111), and all wave crests on the other side of the wavy elastic sheet (131) are in contact with the outer wall of the main conveying pipeline (1); and the three wavy elastic sheets (131) together constitute the concentric support frame (13).

7. A high-pressure gas pipeline leakage monitoring and emergency shut-off system according to claim 6, characterized in that: A large displacement control valve (39) is arranged between the protective gas source (32) and the connecting pipeline (2); the large displacement control valve (39) is connected to the controller via an electrical signal.

8. A high-pressure gas transmission pipeline leakage monitoring and emergency shut-off system according to claim 7, characterized in that: The invention also comprises a convenient guidance module; the convenient guidance module comprises a control unit, an input unit, a record list, a leakage comparison unit, a selection comparison unit and a solution demonstration unit; the control unit is used for the logical operation of the entire convenient guidance module; the input unit is used for inputting other technical parameters except leakage rate in each leakage event, and the technical parameters inputted from the input unit each time are stored in the record list, and at the same time, the control unit retrieves and records the leakage rate obtained by the pressure value monitoring instrument (22) through the controller; the maintenance plan for each leakage event by the maintenance personnel is also stored in the record list through the input unit; the leakage comparison unit is used for comparing the leakage rate data called by the control unit with the existing leakage rate data stored in the record list; the selection comparison unit is used for comparing the other technical parameters except leakage rate inputted by the input unit with the existing other technical parameters stored in the record list; the solution demonstration unit is used for demonstrating and explaining the existing maintenance plan stored in the record list determined after comparison and screening by the leakage comparison unit and the selection comparison unit.

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