A high pressure gas delivery pipeline leak monitoring and emergency shut-off system

Abstract

The application belongs to the technical field of gas delivery monitoring, and particularly relates to a high-pressure gas delivery pipeline leakage monitoring and emergency cut-off system, which comprises a main delivery pipeline, an auxiliary delivery pipeline, a main valve body and a pressure sensor; a cavity formed between the auxiliary delivery pipeline and the main delivery pipeline is communicated through external connecting pipelines at both ends; the pressure sensor is used for detecting the pressure in the cavity formed between the auxiliary delivery pipeline and the main delivery pipeline; a pressure value monitoring instrument is used for monitoring the pressure value change speed of the pressure sensor, and the pressure value monitoring instrument saves and transmits the pressure value change speed to a controller; after detecting that the pressure value of the pressure sensor increases, the controller controls the main valve bodies at both ends of the main delivery pipeline to be closed in the first time, and then cooperates with the pressure value monitoring instrument to monitor the speed of the pressure value increase of the pressure sensor, and then the controller controls the alarm intensity of an alarm instrument according to the size of the pressure value change speed fed back by the pressure value monitoring instrument.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas delivery monitoring, and particularly relates to a high-pressure gas delivery pipeline leakage monitoring and emergency shutdown system. BACKGROUND

[0002] In the high-pressure pipeline delivery process of flammable and explosive, toxic and harmful gases, it is necessary to discover leakage in time as a safety guarantee, because once leakage occurs, explosion and toxic gas harm may occur, which are harmful to the society, and thus, the high-pressure pipeline delivery system of flammable and explosive, toxic and harmful gases must be equipped with a strict leakage monitoring and emergency shutdown module, so as to ensure the safety of the high-pressure pipeline delivery of flammable and explosive, toxic and harmful gases.

[0003] There are some existing technical means for leakage monitoring: such as a gas high-pressure delivery pipeline in a document with the 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 display the observation on the display, and when the numerical error is large, the pipeline body leaks and needs to be repaired. As known from the above, in the scheme, the leakage is determined by comparing the difference between the two flow meters at the head and tail of the pipeline body, and when the leakage amount is small, the leakage signal cannot be quickly captured, and thus the alarm sensitivity is poor, and the leakage speed cannot be displayed when the alarm is given, and thus the maintenance is difficult. Moreover, it is difficult to further design a scheme for determining the leakage point on the basis of the scheme, and thus the scheme has great limitations. SUMMARY

[0004] In order to make up for the deficiencies of the prior art, the application provides a high-pressure gas delivery pipeline leakage monitoring and emergency shutdown system. The application is mainly used to solve the problem that the existing high-pressure gas delivery pipeline system cannot accurately capture the leakage signal, and also cannot display the leakage speed when the alarm is given, and thus the maintenance difficulty is increased.

[0005] The technical scheme adopted by the present application to solve its technical problems is: the present application provides a high-pressure gas conveying pipeline leakage monitoring and emergency shutdown system, comprising a main conveying pipeline, an auxiliary conveying pipeline, a main valve body and a pressure sensor; the auxiliary conveying pipeline is sleeved on the main conveying pipeline; the main valve body is arranged at both ends of each section of the main conveying pipeline; the main valve body is used for controlling the on-off of the main conveying pipeline; the main valve body is connected with a controller through an electrical signal; the cavity formed between the auxiliary conveying pipeline and the main conveying pipeline is communicated through an externally-attached connecting pipeline at both ends; the pressure sensor is used for detecting the pressure in the cavity formed between the auxiliary conveying pipeline and the main conveying pipeline; the pressure sensor is electrically connected with a pressure value monitoring instrument, which is used for monitoring the pressure value change speed of the pressure sensor, and the pressure value monitoring instrument saves and transmits the pressure value change speed to the controller; the controller is electrically connected with an alarm instrument.

[0006] The double-layer conveying pipeline structure formed by the main conveying pipeline and the auxiliary conveying pipeline, because the pressure of the high-pressure gas conveyed in the main conveying pipeline is relatively large, causes the pressure in the auxiliary conveying pipeline to increase in a short time when leakage occurs, and then the pressure sensor detects that the pressure value increases and determines that the main conveying pipeline has leaked, therefore, as long as the main conveying pipeline leaks, whether the leakage amount is large or small, the pressure in the auxiliary conveying pipeline will increase, and the size of the leakage amount will only affect the speed of the pressure change, therefore, this scheme can effectively monitor different degrees of leakage and provide relatively safe protection for the conveying pipeline; after detecting that the pressure value of the pressure sensor increases, the controller will control the main valve bodies at both ends of the section of the main conveying pipeline to close in the first time; then the pressure value monitoring instrument monitors the speed of the pressure value increase of the pressure sensor, and then the controller controls the alarm intensity of the alarm instrument according to the size of the pressure value change speed fed back by the pressure value monitoring instrument, which can be different colors or different sounds to distinguish the size of the pressure value change speed, and then the maintenance personnel can determine the speed of the leakage according to the different alarm intensities displayed by the alarm instrument, and then can determine the speed of the leakage, providing a scheme guidance for subsequent maintenance work; the double-layer pipeline itself can prevent the diffusion of harmful gas and is more safe.

[0007] Preferably, the pipeline system further comprises a circulating pump, a protective gas source, an inlet control valve, an outlet control valve, a gas treatment component and a radiator; the protective gas in the protective gas source is introduced into the connecting pipeline through the inlet control valve, the protective gas entering the connecting pipeline is sequentially cooled by the radiator and driven by the circulating pump, the protective gas passing through the circulating pump and the radiator is then introduced into the cavity formed between the auxiliary conveying pipeline and the main conveying pipeline, the protective gas out of the cavity is then discharged into the gas treatment component through the outlet control valve; the circulating pump, the inlet control valve, the outlet control valve, the gas treatment component and the radiator are electrically connected with the controller.

[0008] In the present case, on the basis of the above structure, a circulating pump, a protective gas source, an inlet control valve, an outlet control valve, a gas treatment component and a radiator are added; after leakage 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 inlet control valve to open, and then the protective gas in the protective gas source is introduced into the connecting pipeline, the protective gas entering the connecting pipeline is cooled by the radiator, and the cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; the protective gas cooled by the radiator is then driven by the circulating pump and introduced into the cavity formed between the auxiliary conveying pipeline and the main conveying pipeline, thereby isolating and diluting the flammable and explosive gas and other harmful gases leaked from the main conveying pipeline into the cavity between the auxiliary conveying pipeline and the main conveying pipeline, thereby reducing the harm caused by leakage; the leaked gas diluted by the protective gas is then discharged into the gas treatment component through the outlet control valve, thereby realizing treatment of the leaked harmful gas in the main conveying pipeline, and thereby enabling maintenance personnel to timely repair or replace the pipeline at the leakage point in a safe environment.

[0009] Preferably, the pipeline system further comprises a gas detection sensor and a timer; the gas detection sensor and the timer are electrically connected with the controller; the gas detection sensor is arranged at the outlet of the outlet control valve, and is used to detect the gas conveyed in the main conveying pipeline.

[0010] In the present case, the gas detection sensor is arranged at the outlet of the outlet control valve, and is used in cooperation with the timer; the timer starts timing from the beginning of introducing the protective gas, and ends timing when the gas detection sensor detects the leaked gas, and thereby the approximate position of the leakage point can be calculated through the timing duration of the timer, and the specific calculation formula is:

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

[0012] L: distance from the leakage point to the gas detection sensor;

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

[0014] V leakage: leakage displacement of the leakage point determined according to the numerical value of the pressure value monitoring instrument and a large amount of experience comparison;

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

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

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

[0018] Further, the maintenance personnel can find the leakage point more quickly for maintenance or replacement, thereby improving the maintenance efficiency. At the same time, the gas detection sensor can also accurately ensure whether the harmful gas in the auxiliary conveying pipeline is completely discharged, thereby ensuring the safety during maintenance.

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

[0020] When the overflow control valve is instantaneously opened, it indicates that a larger leakage occurs in the main conveying pipeline. In the present case, the overflow control valve is arranged in the connecting pipeline, and the pressure relief outlet of the overflow control valve is communicated with the gas treatment component, so that the pressure relief treatment of the main conveying auxiliary conveying pipeline can be directly performed without waiting for the pressure value of the pressure sensor to be stable, thereby preventing the pressure in the cavity between the auxiliary conveying pipeline and the main conveying pipeline from being instantaneously too large, and preventing the harmful gas from diffusing due to leakage of the auxiliary conveying pipeline, thereby making the safety of the pipeline system higher.

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

[0022] In the case, the concentric support frame is arranged between the main conveying pipe and the auxiliary conveying pipe, so that the auxiliary conveying pipe supports and protects the main conveying pipe, for example, bumping, extrusion and the like; and it is beneficial to uniformly cool the main conveying pipe by the cold gas in the auxiliary conveying pipe when the auxiliary conveying pipe is exhausted, so as to ensure that the active state of the conveying gas in the main conveying pipe is consistent, thereby improving the safety in the conveying process; at the same time, because the cross sections of the flow channels between the main conveying pipe and the auxiliary conveying pipe are similar, the diffusion degree of the leaked gas is small when the leaked gas is discharged through the auxiliary conveying pipe because of small obstruction and extrusion, thereby making the calculation of the leakage point more accurate.

[0023] Preferably, three clamping grooves are arranged on the inner wall of the auxiliary conveying pipe in the axial direction; a wave-shaped elastic sheet is arranged in the clamping groove; all wave crests on one side of the wave-shaped elastic sheet are provided with clamping structures, all the clamping structures are clamped in the clamping groove, and all wave crests on the other side of the wave-shaped elastic sheet abut against the outer wall of the main conveying pipe; the three wave-shaped elastic sheets jointly form the concentric support frame.

[0024] In the case, the clamping groove can be a trapezoidal groove or a dovetail groove, which facilitates the installation and replacement of the wave-shaped elastic sheet, thereby facilitating maintenance and better ensuring the maintenance efficiency; the three wave-shaped elastic sheets are arranged in the axial direction, so that the resistance and extrusion of the leaked gas when passing through the auxiliary conveying pipe are minimized. Therefore, the concentric support frame of the structure can disturb the leaked gas flowing in the auxiliary conveying pipe as little as possible, thereby improving the accuracy in calculating the leakage point.

[0025] Preferably, a large-displacement control valve is arranged between the protective gas source and the connecting pipe; and the large-displacement control valve is electrically connected with the controller.

[0026] In the case, the large-displacement control valve is arranged in parallel with the inlet control valve. After the conveying pipe is repaired or replaced, the controller controls the opening of the outlet control valve, the inlet control valve and the large-displacement control valve at the same time, so that the amount of protective gas supplied by the protective gas source is greater than the displacement of the circulating pump, and then a part of the protective gas is discharged from the impurity gas in the auxiliary conveying pipe, and the other part of the excess protective gas is discharged from the impurity gas in the connecting pipe between the protective gas source and the outlet control valve, thereby ensuring that the circulating gas in the whole pipe system is protective gas, thereby ensuring the safety of the pipe system.

[0027] Preferably, the pipeline system further 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 scheme demonstration unit; the control unit is used for logical operation of the whole convenient guidance module; the input unit is used for inputting technical parameters other than leakage speed in each leakage event, and the technical parameters input from the input unit each time are saved in the record list, while the control unit calls and records the leakage speed obtained by the pressure value monitoring instrument through the controller; the repair scheme of maintenance personnel for each leakage event is also saved in the record list through the input unit; the leakage comparison unit is used for comparing the leakage speed data called by the control unit with the existing leakage speed data saved in the record list; the selection comparison unit is used for comparing the technical parameters other than leakage speed input by the input unit with the existing technical parameters saved in the record list; and the scheme demonstration unit is used for demonstrating the existing repair scheme 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 calls the leakage speed obtained by the pressure value monitoring instrument through the controller (the speed of leakage depends on the size of the gap at the leakage position, that is, the discharge capacity of leakage, and then the discharge capacity of the leakage point can be determined according to the value of the pressure value monitoring instrument and a large amount of experience comparison), the leakage comparison unit compares the leakage speed data called by the control unit with the existing leakage speed data saved in the record list, thereby narrowing the selection range of the repair scheme, then the selection comparison unit compares the technical parameters other than leakage speed input by the input unit with the existing technical parameters saved in the record list, thereby screening and determining the repair scheme conforming to the present leakage event, and finally the scheme demonstration unit demonstrates the existing repair scheme saved in the record list determined after screening, thereby facilitating maintenance personnel to quickly and effectively handle the leakage event, while the accuracy of repair is also ensured through the standardized repair process, thereby ensuring that the pipeline system can operate efficiently and stably.

[0029] When the leakage speed or other technical parameters that cannot be found by the pipeline system are encountered, the control unit will automatically pop up the input unit to request maintenance personnel to input other technical parameters and repair schemes, and call and record the leakage speed obtained by the pressure value monitoring instrument through the controller, thereby ensuring that the technical parameters related to each leakage event and the repair scheme are recorded, thereby enabling the pipeline system to continuously update the processing capacity for leakage events, thereby continuously enhancing the processing efficiency for leakage.

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

[0031] 1. The double-layer conveying pipe structure formed by the main conveying pipe and the auxiliary conveying pipe, since the pressure of the high-pressure gas conveyed in the main conveying pipe is relatively large, when leakage occurs, the pressure in the auxiliary conveying pipe increases in a short time, and then the pressure value detected by the pressure sensor becomes large, and it is determined that the main conveying pipe has leaked, therefore, as long as the main conveying pipe leaks, no matter how much the leakage is, the pressure in the auxiliary conveying pipe will become large, and the size of the leakage only affects the speed of the pressure change, therefore, this scheme can effectively monitor different degrees of leakage, and provide relatively safe protection for the conveying pipe; after detecting that the pressure value of the pressure sensor increases, the controller controls the main valve body at both ends of the main conveying pipe to close in the first time; then the speed of the pressure value increase of the pressure sensor is monitored by cooperating with the pressure value monitoring instrument, and then the controller controls the alarm intensity of the alarm instrument according to the speed of the change 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 speed of the 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 scheme guidance for subsequent maintenance work; the double-layer pipe itself can prevent the diffusion of harmful gas, and is more safe.

[0032] 2. The circulation pump, the protective gas source, the air inlet control valve, the air outlet control valve, the gas treatment component and the radiator are added on the basis of the above structure in the application; after leakage 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 inlet control valve to open, and then the protective gas in the protective gas source is introduced into the connecting pipe, and the protective gas in the connecting pipe is cooled by the radiator, the cooled protective gas can cool the leaked flammable and explosive gas, and the risk of combustion and explosion is reduced; the protective gas cooled by the radiator is driven by the circulation pump and then introduced into the cavity formed between the auxiliary conveying pipe and the main conveying pipe, and then the flammable and explosive gas and other harmful gas leaked from the main conveying pipe into the cavity between the auxiliary conveying pipe and the main conveying pipe are isolated and diluted, and the harm caused by the leakage is reduced; the leakage gas diluted by the protective gas is discharged into the gas treatment component through the air outlet control valve, and then the harmful gas leaked in the main conveying pipe is treated, and the maintenance personnel can timely repair or replace the pipeline at the leakage position in a safe environment.

[0033] 3. The application is characterized in that the gas detection sensor is arranged at the outlet of the outlet control valve, and is used in cooperation with the timer; the timer starts timing from the start of the protective gas input, and ends timing when the gas detection sensor detects the leaked gas; the approximate position of the leakage point can be calculated through the timing length of the timer, so that the maintenance personnel can quickly find the leakage point for maintenance or replacement, thereby improving the maintenance efficiency. At the same time, the gas detection sensor can also accurately ensure whether the harmful gas in the auxiliary conveying pipeline is completely discharged, thereby ensuring safety during maintenance.

[0034] 4. The application is characterized in that when a leakage event occurs, the control unit calls the leakage speed obtained by the pressure value monitoring instrument through the controller, the leakage comparison unit compares the leakage speed data called by the control unit with the existing leakage speed data saved in the record list, thereby narrowing the selection range of the maintenance scheme, and then the selection comparison unit compares other technical parameters input by the input unit except the leakage speed with the existing other technical parameters saved in the record list, thereby screening and determining the maintenance scheme corresponding to the leakage event, and finally the scheme demonstration unit demonstrates the existing maintenance scheme saved in the record list which is screened and determined, thereby facilitating the maintenance personnel to quickly and effectively handle the leakage event, and at the same time, the standardized maintenance process also ensures the accuracy of the maintenance, thereby ensuring that the pipeline system can operate efficiently and stably. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be further described below in combination with the drawings.

[0036] Figure 1 is the overall structure diagram of the high-pressure gas conveying pipeline system in the application;

[0037] Figure 2 is the connection diagram of the concentric support frame in the application;

[0038] Figure 3 is Figure 2 the rotating section view in A-A direction in the application;

[0039] Figure 4 is the structure block diagram of the convenient guidance module in the application;

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

[0041] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0042] As shown in Figure 1 A high-pressure gas pipeline leakage monitoring and emergency shutdown system, comprising a main conveying pipeline 1, an auxiliary conveying pipeline 11, a main valve body 12 and a pressure sensor 21; the auxiliary conveying pipeline 11 is sleeved on the main conveying pipeline 1; the main valve body 12 is arranged at both ends of each section of the main conveying pipeline 1; the main valve body 12 is used for controlling the opening and closing of the main conveying pipeline 1; the main valve body 12 is connected with a controller through an electrical signal; the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1 is communicated through an external connecting pipeline 2 at both ends; the pressure sensor 21 is used for detecting the pressure in the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1; the pressure sensor 21 is electrically connected with a pressure value monitoring instrument 22, which is used for monitoring 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 with an alarm instrument.

[0043] The double-layer conveying pipeline structure formed by the main conveying pipeline 1 and the auxiliary conveying pipeline 11, because the pressure of the high-pressure gas conveyed in the main conveying pipeline 1 is large, the pressure in the auxiliary conveying pipeline 11 increases in a short time when leakage occurs, and then the pressure sensor 21 detects that the pressure value increases to determine that the main conveying pipeline 1 has leaked, therefore, as long as the main conveying pipeline 1 leaks, whether the leakage amount is large or small, the pressure in the auxiliary conveying pipeline 11 will increase, and the size of the leakage amount only affects the speed of the pressure change, therefore, this scheme can effectively monitor different degrees of leakage and provide safer protection for the conveying pipeline; after detecting that the pressure value of the pressure sensor 21 increases, the controller controls the main valve body 12 at both ends of the section of the main conveying pipeline 1 to close in the first time; then the pressure value monitoring instrument 22 monitors the speed of the pressure value increase of the pressure sensor 21, and then the controller controls the alarm intensity of the alarm instrument according to the size of the pressure value change speed fed back by the pressure value monitoring instrument 22, which can be different colors or different sounds to distinguish the size of the pressure value change speed, and then the maintenance personnel can determine the speed of the leakage according to the different alarm intensities displayed by the alarm instrument, thereby providing a scheme guide for subsequent maintenance work; the double-layer pipeline itself can prevent the diffusion of harmful gas, which is safer.

[0044] As shown in Figure 1As shown, the pipeline system further comprises a circulating pump 31, a protective gas source 32, an inlet control valve 33, an outlet control valve 34, a gas treatment component 35 and a radiator 36; the protective gas in the protective gas source 32 is introduced into the connecting pipeline 2 through the inlet control valve 33, the protective gas entering the connecting pipeline 2 is sequentially passed through the radiator 36 and the circulating pump 31, and then the protective gas passing through the circulating pump 31 and the radiator 36 is passed through the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1, and the protective gas coming out of the cavity is discharged into the gas treatment component 35 through the outlet control valve 34; the circulating pump 31, the inlet control valve 33, the outlet control valve 34, the gas treatment component 35 and the radiator 36 are electrically connected with the controller.

[0045] In the present case, on the basis of the above structure, the circulating pump 31, the protective gas source 32, the inlet control valve 33, the outlet control valve 34, the gas treatment component 35 and the radiator 36 are added; 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 inlet control valve 33 to open, and then the protective gas in the protective gas source 32 is introduced into the connecting pipeline 2, and the protective gas entering the connecting pipeline 2 is cooled and treated by the radiator 36, and the cooled protective gas can cool the leaked flammable and explosive gas, thereby reducing the risk of combustion and explosion; the protective gas cooled and treated by the radiator 36 is driven into the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1 by the circulating pump 31, thereby isolating and diluting the flammable and explosive gas and other harmful gases leaked 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 leakage; the leaked gas diluted by the protective gas is discharged into the gas treatment component 35 through the outlet control valve 34, thereby realizing treatment of the leaked harmful gas in the main conveying pipeline 1, and thereby enabling maintenance personnel to timely repair or replace the pipeline at the leakage in a safe environment.

[0046] As shown in Figure 1 The pipeline system further comprises a gas detection sensor 37 and a timer; the gas detection sensor 37 and the timer are electrically connected with the controller; the gas detection sensor 37 is arranged at the outlet of the outlet control valve 34, and is used to detect the gas conveyed in the main conveying pipeline 1.

[0047] In the case, the gas detection sensor 37 is arranged at the outlet of the outlet control valve 34, and is used in cooperation with the timer; the timer starts timing from the start of the protective gas input, and ends timing when the gas detection sensor 37 detects the leaked gas, and then the approximate position of the leakage point can be calculated according to the timing duration of the timer, and the specific calculation formula is:

[0048] L = (V circulating pump * t timing + V leakage * t timing) / (S auxiliary conveying pipeline - S main conveying pipeline)

[0049] L: distance of the leakage point from the gas detection sensor;

[0050] V circulating pump: displacement of the circulating pump;

[0051] V leakage: leakage displacement of the leakage point determined according to the value of the pressure value monitoring instrument and a large amount of experience comparison;

[0052] t timing: timing duration of the timer;

[0053] S auxiliary conveying pipeline: inner diameter cross-sectional area of the auxiliary conveying pipeline;

[0054] S main conveying pipeline: outer diameter cross-sectional area of the main conveying pipeline;

[0055] Thus, the maintenance personnel can find the leakage point more quickly for maintenance or replacement, thereby improving the maintenance efficiency. At the same time, the gas detection sensor 37 can also accurately ensure whether the harmful gas in the auxiliary conveying pipeline 11 is completely discharged, thereby ensuring the safety during maintenance.

[0056] As shown in Figure 1 , the overflow control valve 38 is arranged in the connecting pipeline 2; the pressure relief outlet of the overflow control valve 38 is connected to the pipeline between the outlet control valve 34 and the gas detection sensor 37; the overflow control valve 38 is connected to the controller through an electrical signal.

[0057] When the overflow control valve 38 is suddenly opened, it means that the main conveying pipeline 1 has a large leakage. In the case, the 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 treatment component 35, so that the pressure relief treatment of the main conveying auxiliary conveying pipeline 11 can be directly performed without waiting for the pressure value of the pressure sensor 21 to be stable, thereby preventing the pressure in the cavity between the auxiliary conveying pipeline 11 and the main conveying pipeline 1 from being too large instantaneously, preventing the harmful gas from diffusing due to the leakage of the auxiliary conveying pipeline 11, and thereby making the safety of the pipeline system higher.

[0058] As shown in Figure 2 and 3As shown, the concentric support frame 13 is arranged between the main conveying pipeline 1 and the auxiliary conveying pipeline 11, and is used to provide mutual support force between the main conveying pipeline 1 and the auxiliary conveying pipeline 11.

[0059] In the present case, the 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, such as bumping, extrusion and the like; and is conducive to uniform cooling of the main conveying pipeline 1 by the cold gas in the auxiliary conveying pipeline 11 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 in the conveying process; at the same time, because the cross section of the flow passage between the main conveying pipeline 1 and the auxiliary conveying pipeline 11 is similar, thereby making the diffusion degree of the leaked gas smaller in the auxiliary conveying pipeline 11 when it is discharged through the auxiliary conveying pipeline 11 because of smaller obstruction and extrusion, thereby making the calculation of the leakage point more accurate.

[0060] As shown in Figure 2 and 3 As shown, three clamping grooves 111 are arranged on the inner wall of the auxiliary conveying pipeline 11 in the axial direction; the wave-shaped elastic sheet 131 is arranged in the clamping groove 111; all the wave crests on one side of the wave-shaped elastic sheet 131 are provided with clamping structures, all the clamping structures are clamped in the clamping groove 111, and all the wave crests on the other side of the wave-shaped elastic sheet 131 abut against the outer wall of the main conveying pipeline 1; the three wave-shaped elastic sheets 131 jointly constitute the concentric support frame 13.

[0061] In the present case, the clamping groove 111 can be a trapezoidal groove or a dovetail groove, which facilitates the installation and replacement of the wave-shaped elastic sheet 131, thereby facilitating maintenance and better ensuring maintenance efficiency; the three wave-shaped elastic sheets 131 arranged in the axial direction make the resistance and extrusion of the leaked gas passing through the auxiliary conveying pipeline 11 minimum, so that the concentric support frame 13 of this structure can disturb the leaked gas flowing in the auxiliary conveying pipeline 11 as little as possible, thereby improving the accuracy in calculating the leakage point.

[0062] As shown in Figure 1 As shown, the 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 electrically connected with the controller.

[0063] In the case, by setting the large displacement control valve 39 in parallel with the inlet control valve 33, after the delivery pipeline is repaired or replaced, the large displacement control valve 39 is opened by the controller while the outlet control valve 34 and the inlet control valve 33 are opened, so that the amount of protective gas supplied by the protective gas source 32 is greater than the displacement of the circulating pump 31, and then a part of the protective gas will discharge the impurity gas in the auxiliary delivery pipeline 11 after the circulating pump 31 is started, and the other part of the excess protective gas will discharge the impurity gas in the connecting pipeline 2 between the protective gas source 32 and the outlet control valve 34, thereby ensuring that the circulating gas in the entire pipeline system is protective gas, thereby ensuring the safety of the pipeline system.

[0064] As shown in Figure 4 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 scheme 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 speed in each leakage event, and the technical parameters input from the input unit each time are saved in the record list, at the same time the control unit calls and records the leakage speed obtained by the pressure value monitoring instrument 22 through the controller; the maintenance scheme of maintenance personnel 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 speed data called by the control unit with the existing leakage speed data saved in the record list; the selection comparison unit is used to compare other technical parameters except the leakage speed input by the input unit with the existing other technical parameters saved in the record list; the scheme demonstration unit is used to demonstrate the existing maintenance scheme saved in the record list after being screened by the leakage comparison unit and the selection comparison unit.

[0065] When a leakage event occurs, the control unit calls the leakage speed obtained by the pressure value monitoring instrument 22 through the controller, which depends on the size of the gap at the leakage point, that is, the leakage displacement, and then the leakage displacement of the leakage point can be determined according to the value of the pressure value monitoring instrument 22 and a large amount of experience comparison. The leakage comparison unit compares the leakage speed data called by the control unit with the existing leakage speed data saved in the record list, thereby narrowing the selection range of the repair scheme. Then, the selection comparison unit compares other technical parameters input by the input unit in addition to the leakage speed with the existing other technical parameters saved in the record list, thereby screening and determining the repair scheme that matches the current leakage event. Finally, the scheme demonstration unit demonstrates the existing repair scheme saved in the record list that is screened and determined, thereby facilitating the maintenance personnel to quickly and effectively handle the leakage event. At the same time, the standardized repair process also ensures the accuracy of the repair, thereby ensuring that the pipeline system can operate efficiently and stably.

[0066] When the leakage speed or other technical parameters of the pipeline system cannot be found, the control unit will automatically pop up the input unit to request the maintenance personnel to input other technical parameters and repair schemes. The leakage speed obtained by the pressure value monitoring instrument 22 is called and recorded through the controller, thereby ensuring that the technical parameters and repair schemes related to each leakage event are recorded, thereby enabling the pipeline system to continuously update the handling capacity for leakage events, thereby continuously enhancing the processing efficiency for leakage.

[0067] When working, the pressure value of the pressure sensor 21 increases after 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 inlet control valve 33 to open, thereby allowing the protective gas in the protective gas source 32 to flow into the connecting pipeline 2. The protective gas in the connecting pipeline 2 is cooled by the radiator 36. The cooled protective gas can cool the flammable and explosive gas leaked, thereby reducing the risk of combustion and explosion. After being cooled by the radiator 36, the protective gas is driven by the circulating pump 31 and enters the cavity formed between the auxiliary conveying pipeline 11 and the main conveying pipeline 1, thereby isolating and diluting the flammable and explosive gas leaked 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 leakage.

[0068] When the leakage event occurs, the control unit calls the leakage speed (the speed of the leakage depends on the size of the gap at the leakage, that is, the displacement of the leakage, and then the leakage displacement of the leakage point can be determined according to the value of the pressure value monitoring instrument 22 and a large amount of experience comparison) obtained by the pressure value monitoring instrument 22 through the controller, the leakage comparison unit compares the leakage speed data called by the control unit with the existing leakage speed data saved in the record list, and then narrows down the selection range of the repair scheme, and then the selection comparison unit compares other technical parameters input by the input unit except the leakage speed with the existing other technical parameters saved in the record list, and then screens and determines the repair scheme corresponding to the leakage event, and finally the scheme demonstration unit demonstrates the existing repair scheme saved in the record list, and then facilitates the maintenance personnel to quickly and effectively handle the leakage event, and at the same time, the standardized repair process also ensures the accuracy of the repair, and then ensures that the pipeline system can be efficiently and stably operated.

[0069] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A high pressure gas delivery pipeline leak monitoring and emergency shut-off system characterized by: The system comprises a main conveying pipeline (1), an auxiliary conveying pipeline (11), a main valve body (12) and a pressure sensor (21); the auxiliary conveying pipeline (11) is sleeved on the main conveying pipeline (1); each end of the main conveying pipeline (1) is provided with the main valve body (12); the main valve body (12) is used for controlling the on-off of the main conveying pipeline (1); the main valve body (12) is connected with the controller through an electrical signal; the cavity formed between the auxiliary conveying pipeline (11) and the main conveying pipeline (1) is communicated with the connecting pipeline (2) at both ends; the pressure sensor (21) is used for detecting the pressure in the cavity formed between the auxiliary conveying pipeline (11) and the main conveying pipeline (1); the pressure sensor (21) is electrically connected with a pressure value monitoring instrument (22), the pressure value monitoring instrument (22) is used for monitoring 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 with an alarm instrument; The system further comprises a circulating pump (31), a protective gas source (32), an inlet control valve (33), an outlet control valve (34), a gas treatment component (35) and a radiator (36); the protective gas in the protective gas source (32) is introduced into the connecting pipeline (2) through the inlet control valve (33), the protective gas entering the connecting pipeline (2) passes through the radiator (36) and the circulating pump (31) in sequence, then passes through the cavity formed between the auxiliary conveying pipeline (11) and the main conveying pipeline (1), and the protective gas out of the cavity passes through the outlet control valve (34) and is discharged into the gas treatment component (35); the circulating pump (31), the inlet control valve (33), the outlet control valve (34), the gas treatment component (35) and the radiator (36) are electrically connected with the controller; The system further comprises a gas detection sensor (37) and a timer; the gas detection sensor (37) and the timer are electrically connected with the controller; the gas detection sensor (37) is arranged at the outlet of the outlet control valve (34) and is used for detecting the gas conveyed in the main conveying pipeline (1); An overflow control valve (38) is arranged in the connecting pipeline (2); the pressure relief outlet of the overflow control valve (38) is connected to the pipeline between the outlet control valve (34) and the gas detection sensor (37); the overflow control valve (38) is connected with the controller through an electrical signal; 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 electrically connected with the controller.

2. A high pressure gas delivery pipeline leak monitoring and emergency shut-off system according to claim 1, characterised in that: The concentric support frame (13) is arranged between the main conveying pipe (1) and the auxiliary conveying pipe (11) and is used to provide mutual support force between the main conveying pipe (1) and the auxiliary conveying pipe (11).

3. A high pressure gas delivery conduit leak monitoring and emergency shut-off system according to claim 2, characterised in that: Three clamping grooves (111) are arranged on the inner wall of the auxiliary conveying pipe (11) in the axial direction; a wave-shaped elastic sheet (131) is arranged in each clamping groove (111); all wave crests on one side of the wave-shaped elastic sheet (131) are provided with clamping structures, all the clamping structures are clamped in the clamping grooves (111), and all wave crests on the other side of the wave-shaped elastic sheet (131) abut against the outer wall of the main conveying pipe (1); three wave-shaped elastic sheets (131) jointly constitute the concentric support frame (13).

4. A high pressure gas delivery conduit leak monitoring and emergency shut-off system according to claim 3, characterised in that: The convenient guidance module also includes a control unit, an input unit, a record list, a leakage comparison unit, a selection comparison unit and a scheme demonstration unit; the control unit is used for logical operation of the entire convenient guidance module; the input unit is used for inputting technical parameters other than leakage speed in each leakage event, and the technical parameters input from the input unit each time are saved in the record list, and the control unit retrieves and records the leakage speed obtained by the pressure value monitoring instrument (22) through the controller; the maintenance scheme of maintenance personnel for each leakage event is also saved in the record list through the input unit; the leakage comparison unit is used for comparing the leakage speed data called by the control unit with the existing leakage speed data saved in the record list; the selection comparison unit is used for comparing the technical parameters other than leakage speed input by the input unit with the existing technical parameters saved in the record list; and the scheme demonstration unit is used for demonstrating and explaining the existing maintenance scheme saved in the record list after screening by the leakage comparison unit and the selection comparison unit.

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