CN209893115U - Safe conveying device for high-pressure combustible experimental gas - Google Patents
Safe conveying device for high-pressure combustible experimental gas Download PDFInfo
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- CN209893115U CN209893115U CN201920160887.9U CN201920160887U CN209893115U CN 209893115 U CN209893115 U CN 209893115U CN 201920160887 U CN201920160887 U CN 201920160887U CN 209893115 U CN209893115 U CN 209893115U
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Abstract
The utility model discloses a gaseous safe conveyor of high pressure flammability experiment. The device comprises a combustible experimental gas cylinder, an inert gas cylinder, a filter, a pipeline pressure reducing valve, a manual stop valve, a pneumatic stop valve, a pressure transmitter, a vacuum pump, a pressure gauge, a vacuum gauge, an electromagnetic valve, a combustible gas detector, a combustible gas alarm controller, a metal pipeline and the like. The apparatus may be used to: 1) safely conveying combustible gas to experimental equipment; 2) the gas pressure is adjusted in a full-range manner in the using process; 3) continuously or intermittently supplying gas to the laboratory equipment; 4) carrying out air tightness inspection before equipment experiment and cleaning tail gas after experiment for gas supply; 5) the high-pressure gas cylinder is safely and conveniently replaced; 6) and the concentration of combustible gas is detected in real time, and the safety of a laboratory is maintained. The utility model discloses have good gas tightness, high cleanliness, high durability and fail safe nature, can satisfy and last air feed, intermittent type air feed to laboratory paraphernalia.
Description
Technical Field
The utility model relates to a combustible experimental gas transport system especially relates to a gaseous safe conveyor of high pressure combustible experimental.
Background
Combustible test gases include hydrogen, acetylene, methane, etc., and are often supplied to experimental devices, instruments, etc. from gas cylinders through pipelines. However, when the gas is transported and used improperly, combustible gas can be leaked, and once an ignition source is met, a fire explosion accident is easily caused, so that casualties and property loss are caused. For example, in 2015, a laboratory in a college was exploded to cause 1 death, and the initial confirmation was that gas explosion was caused by improper use of hydrogen. How to ensure the safe transportation and operation of combustible gases in a laboratory, particularly high-pressure gases, is a problem which needs to be focused on the safety of the laboratory. High-pressure combustible experimental gas has high requirements on the airtightness, durability, safety reliability and functionality of pipelines, so that a reasonable gas supply and transportation pipeline system is designed when the high-pressure combustible gas is used as the experimental gas.
The existing laboratory gas supply system is divided into a distributed gas supply and a centralized gas supply according to the supply mode. The dispersed gas supply is to place the gas cylinders in each instrument analysis chamber respectively and approach the gas points of the instruments; the centralized gas supply is that various gas steel cylinders are centrally placed in independent gas cylinders outside laboratories, and then are conveyed to different laboratory instruments of each laboratory in a pipeline conveying mode according to different requirements. The operation of dispersed gas supply is convenient, the gas is saved, but the safety is poor; the centralized gas supply has high reliability and strong functionality, but the gas supply pipeline wastes gas for a long time, and the gas source is inconvenient to use when being opened or closed. For the transportation of high-pressure combustible gas in an independent laboratory, a distributed gas supply method is generally adopted. If the advantages of the centralized gas supply method can be integrated into a distributed gas supply system, the conveying safety and functionality of the combustible experimental gas can be greatly improved. Based on this, the utility model discloses combine the advantage of two kinds of air feed modes, designed a combustible experimental gas safety transport system who is applicable to high-pressure gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a have good gas tightness, high cleanliness, high durability and fail safe nature, can satisfy and last air feed, intermittent type air feed to laboratory paraphernalia to can carry out the combustible experiment gas safety conveyor of full range adjustment to gas pressure according to operating condition in the use.
The utility model adopts the technical proposal that: a safe transportation device for high-pressure combustible experimental gas comprises a gas cylinder group, a gas supply pipeline unit, a vacuumizing unit and a combustible gas alarm unit; the gas cylinder group and the gas supply pipeline unit are used for stably and continuously supplying gas or intermittently supplying gas into the laboratory equipment, and simultaneously can also provide a gas source for the detection of gas tightness before experiment and the promotion of tail gas discharge in the device after experiment, and the gas supply pipeline unit can perform full-range adjustment on gas pressure in the whole experiment process according to experiment requirements; the vacuumizing unit is used for extracting gas in the experimental device before the experiment; the combustible gas alarm unit is used for giving out sound and light alarms to remind of taking safety measures, exhausting air in a linkage mode and cutting off a power supply when the gas leakage concentration reaches the alarm concentration, and the safety of an experiment is guaranteed.
Further, the specific structure of the device is as follows: the gas cylinder group mainly comprises a combustible experimental gas cylinder and an inert gas cylinder. The air supply pipeline unit mainly comprises a first filter, a second filter, a first pipeline pressure reducing valve, a second pipeline pressure reducing valve, a third pipeline pressure reducing valve, a first manual stop valve, a second manual stop valve, a third manual stop valve, a fourth manual stop valve, a fifth manual stop valve, a first pneumatic stop valve, a second pneumatic stop valve, a third pneumatic stop valve, a pressure transmitter, a control box and a metal pipeline; the combustible experimental gas bottle is connected with a first filter, a first pipeline pressure reducing valve, a first pneumatic stop valve, a first manual stop valve and a pressure transmitter which are connected in parallel through pipelines, the inert gas bottle is connected with a second filter, a second pipeline pressure reducing valve, a second pneumatic stop valve and a second manual stop valve which is connected in parallel through pipelines, and the two pipelines are connected in parallel; the evacuation pipe is controlled by a fourth manual stop valve, is connected with a combustible gas and inert gas pipeline and is converged on the main high-pressure pipeline and is used for discharging gas in the device; 2 pressure gauges are arranged on the connecting sides of the first, second and third pipeline pressure reducing valves and the gas cylinder and the main pipeline, and respectively display the pressure in the gas cylinder and the pressure change in the pipeline; a plurality of electromagnetic valve switches are arranged in the control box, the first, second and third pneumatic stop valves are controlled to be opened and closed, the box body is connected with an inert gas cylinder through a third manual stop valve, a third pipeline pressure reducing valve and a metal pipeline, and pressure required in the control box is provided through the inert gas cylinder and the third pipeline pressure reducing valve; the pressure transmitter is used for judging whether the pressure maintaining of the equipment is successful or not when the combustible gas supplies gas to the experimental equipment. The vacuum pumping system comprises a pneumatic stop valve and a vacuum pump with a vacuum meter, wherein the vacuum pump with the vacuum meter is connected with a third pneumatic stop valve through a pipeline and then is connected to a main high-pressure pipeline through the pipeline; the opening and closing of the third pneumatic stop valve and the vacuum pump are switched on and off by corresponding electromagnetic valves in the control box: a third pneumatic stop valve opening button, a third pneumatic stop valve closing button, a vacuum pump opening button and a vacuum pump closing button. The combustible gas alarm unit comprises a gas detector and a gas alarm controller; when combustible gas leaks, the alarm acts to give out sound and light alarm and output electric signals; an emergency braking and stopping button is arranged in the control box, and when the system alarms, an experimenter can press the button to enable an electromagnetic valve in the control box to act, close a pneumatic control valve on an air supply pipeline and cut off the air pipeline; meanwhile, the gas alarm controller receives an electric signal, and the gas alarm controller performs linkage air exhaust and cuts off the power supply to close the electromagnetic valve so as to cut off the gas circuit.
Adopt above technical scheme the utility model discloses, following beneficial effect has: safe, reliable, convenient operation, gas saving and strong functionality. The combustible experimental gas safe transportation system is used for safely transporting combustible gas to experimental equipment, and can adjust the gas pressure in a full-range manner in the using process so as to ensure that the gas in the experimental device meets experimental requirements; and continuous air supply and intermittent air supply of laboratory equipment can be met, and more choices are provided for experimental design.
Drawings
Fig. 1 is a schematic view of the general structure of a safe transportation device for high-pressure combustible experimental gas of the present invention;
FIG. 2 is a schematic diagram of a control box structure in the transportation device;
FIG. 3 is a schematic diagram of a test device for high-pressure combustible gas leakage spontaneous combustion and shock wave induced ignition in the example.
Name and number corresponding table of each component of transport system in attached drawing
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
The utility model relates to a safe conveyor of high pressure combustible experimental gas mainly comprises combustible experimental gas cylinder 1, inert gas cylinder 2, first and second filters 3 and 4, first, second and third pipeline pressure reducing valves 5, 6 and 19, first, second, third, fourth and fifth manual stop valves 7, 8, 18, 15 and 14, first, second and third pneumatic stop valves 9, 10 and 12, pressure transmitter 11, control box 20 and metal pipelines; the flammable experiment gas bottle 1 is connected with a first filter 3, a first pipeline pressure reducing valve 5, a first pneumatic stop valve 9, a first manual stop valve 7 and a pressure transmitter 11 which are connected in parallel through pipelines, the inert gas bottle 2 is connected with a second filter 4, a second pipeline pressure reducing valve 6, a second pneumatic stop valve 10 and a second manual stop valve 8 which is connected in parallel through pipelines, and the two pipelines are connected in parallel; the evacuation pipe is controlled by a fourth manual stop valve 15, is connected with a combustible gas and safety gas pipeline and is converged on a main high-pressure pipeline 16 and is used for discharging gas in the device; 2 pressure gauges are arranged on the connecting sides of the first, second and third pipeline pressure reducing valves 5, 6 and 19 and the gas cylinder and the main pipeline, and respectively display the pressure in the gas cylinder and the pressure in the pipeline; the control box 20 is provided with a plurality of electromagnetic valve switches for controlling the opening and closing of the first, second and third pneumatic stop valves 9, 10 and 12, the box body is connected with the inert gas cylinder 2 through a third manual stop valve 18, a third pipeline pressure reducing valve 19 and a metal pipeline, and the inert gas cylinder 2 and the third pipeline pressure reducing valve 19 provide the pressure required in the control box; the pressure transmitter 11 is used for judging whether the pressure maintaining of the equipment is successful or not when the combustible gas continuously supplies gas to the experimental equipment. The vacuum pumping system comprises a third pneumatic stop valve 12 and a vacuum pump 13 with a vacuum meter, wherein the vacuum pump 13 with the vacuum meter is connected with the third pneumatic stop valve 12 through a pipeline and then is connected to a main high-pressure pipeline 16 through a pipeline; the opening and closing of the third pneumatic stop valve 12 and the vacuum pump 13 are controlled by corresponding solenoid valves in the control box 20: the third pneumatic stop valve 12 opening button 30, the third pneumatic stop valve 12 closing button 31, the vacuum pump opening button 24 and the vacuum pump closing button 25. The combustible gas alarm system comprises a gas detector 21 and a gas alarm controller 22; when combustible gas leaks, the alarm acts to give out sound and light alarm and output electric signals; an emergency braking button 32 is arranged in the control box, and when the system alarms, an experimenter can press the button to enable an electromagnetic valve in the control box to act, close a pneumatic control valve on an air supply pipeline and cut off the air pipeline; meanwhile, the gas alarm controller 22 receives an electric signal, and exhaust air in a linkage manner and cut off the power supply to close the electromagnetic valve so as to cut off the gas circuit.
Further, the utility model discloses a working process as follows:
1. before the experiment, the main valves of a combustible experimental gas cylinder 1 and an inert gas cylinder 2, a first manual stop valve, a second manual stop valve, a fourth manual stop valve 7, a fourth manual stop valve 8, a fourth manual stop valve 15, a first pneumatic stop valve 9, a second pneumatic stop valve 10, a third pneumatic stop valve 12, a first pipeline pressure reducing valve 5 and a second pipeline pressure reducing valve 6 are closed; 2. the third and fifth manual stop valves 18 and 14 are normally opened, a main valve of the inert gas cylinder 2 is opened before an experiment, and the pressure of the third pipeline pressure reducing valve 19 on the side communicated with the electromagnetic valve 20 is confirmed to reach the working pressure through a pressure gauge;
checking the airtightness of the sealing device and evacuating
If the experimental device is in a closed state, the device can be used for checking the tightness of the device and vacuumizing. The operation process of the tightness test is as follows: confirm that 2 main valves of inert gas cylinder open, press the opening button 28 of second pneumatic stop valve 10 on the control box 20, manually adjust second pipeline relief pressure valve 6 and make the experimental apparatus pressurize to certain pressure value, press the closing button 29 of second pneumatic stop valve 10 on the control box 20, detect the experimental apparatus leakproofness, the leakproofness passes through the back, opens the pressure release of fourth manual stop valve 15, closes this stop valve afterwards, closes second pipeline relief pressure valve 6. The vacuum pumping operation process comprises the following steps: and confirming that the main valve of the inert gas cylinder 2 is opened, pressing an opening button 30 and a vacuum pump opening button 24 of the third pneumatic stop valve 12 on the control box 20, and after the vacuumizing is finished, sequentially pressing a closing button 31 and a vacuum pump closing button 25 of the third pneumatic stop valve 12 on the control box.
(II) intermittent air supply to experimental equipment
Opening a main valve of a combustible experimental gas cylinder 1, pressing an opening button 26 of a first pneumatic stop valve 9 on a control box 20, and manually adjusting a first pipeline pressure reducing valve 5 to enable data of a main pipeline side pressure gauge to reach experimental pressure; if the experimental device is in a closed state, a closing button 27 of the first pneumatic stop valve 9 is pressed, whether the data of the pressure transmitter 11 is obviously reduced within 3 minutes is observed, and if the data is not changed, gas supply is successful; after the experiment is finished, a closing button 27 of the first pneumatic stop valve 9 is pressed, and the first pipeline pressure reducing valve 5 is closed; then, the opening button 28 of the second pneumatic stop valve 10 on the control box 20 is pressed, the second pipeline pressure reducing valve 6 is manually adjusted, the closing button 29 of the second pneumatic stop valve 10 on the control box 20 is pressed after the pipeline is purged with inert gas, the second pipeline pressure reducing valve 6 is closed, and the main valve of the combustible experimental gas cylinder 1 and the main valve of the inert gas cylinder 2 are closed.
(III) stably and continuously supplying gas to the experimental equipment
Confirming that a main valve of an inert gas cylinder 2 is opened, pressing an opening button 28 of a second pneumatic stop valve 10 on a control box 20, manually adjusting a second pipeline pressure reducing valve 6, blowing a pipeline with inert gas, pressing a closing button 29 of the second pneumatic stop valve 10, closing the second pipeline pressure reducing valve 6, opening a main valve of a combustible experimental gas cylinder 1, pressing an opening button 26 of a first pneumatic stop valve 9 on the control box 20, and manually adjusting a first pipeline pressure reducing valve 5 to enable data of a main pipeline side pressure gauge to reach gas supply pressure; and observing whether the data of the pressure transmitter 11 obviously fluctuate or not, and if not, realizing stable and continuous gas supply of the experimental equipment.
(IV) safe replacement of gas cylinders in transport systems
Combustible test gas cylinder replacement: checking that the combustible experimental gas cylinder 1 is in a closed state, opening the first and fourth manual stop valves 7 and 15, adjusting the first pipeline pressure reducing valve 5 to exhaust the combustible experimental gas in the pipeline (when pressure gauges on two sides of the first pipeline pressure reducing valve are both displayed as 0), keeping the first pipeline pressure reducing valve 5 still, and replacing the gas cylinder with a new gas cylinder; ensuring that the experimental equipment is in a closed state, if the experimental equipment is an open type device, installing a normally open fifth manual stop valve 14 at the main pipeline, and closing the stop valve to form a closed loop; closing the fourth manual cut-off valve 15; opening a main valve of an inert gas cylinder 2, pressing an opening button 30 of a third pneumatic stop valve 12 and an opening button 24 of a vacuum pump 13 on a control box 20 to vacuumize, closing a first manual stop valve 7 and a first pipeline pressure reducing valve 5 after the vacuumization is finished, and then sequentially pressing a closing button 31 of the third pneumatic stop valve 12 and a closing button 25 of the vacuum pump 13 on the control box 20; opening the fifth manual cut-off valve 14; and (3) opening a main valve of the combustible test gas cylinder 1, and determining the total pressure in the combustible test gas cylinder 1 through a pressure meter of the gas cylinder side by a first pipeline pressure reducing valve 5.
Replacing the inert gas cylinder: checking that the inert gas cylinder 2 is in a closed state, closing the third manual stop valve 18, opening the second manual stop valve 8, adjusting the second pipeline pressure reducing valve 6 to exhaust the inert gas in the pipeline (namely when pressure gauges on two sides of the second pipeline pressure reducing valve are both displayed as 0), keeping the second pipeline pressure reducing valve 6 still, and replacing the gas cylinder; closing the second manual stop valve 8 and the second pipeline pressure reducing valve 6, opening a main valve of the inert gas cylinder 2, and determining the total pressure in the inert gas cylinder 2 through a gas cylinder side pressure meter of the second pipeline pressure reducing valve 6; the third manual cut-off valve 18 is opened and the third line pressure reducing valve 19 is adjusted to the solenoid valve side pressure to its operating pressure.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in FIG. 3, the experimental device is a test device for high-pressure combustible gas leakage spontaneous combustion and shock wave induced ignition. Will the utility model discloses a trunk line 16 is connected with the device, and combustible experimental gas is hydrogen, and inert gas is nitrogen gas. The brief working process of the experimental device is as follows: the hydrogen is conveyed to the high-pressure storage tank 33 by utilizing the utility model, and is filled to a certain pressure to simulate the high-pressure storage of the hydrogen; the rupture disc holder 36 is connected to the high pressure reservoir 33 and when the reservoir pressure is higher than the pressure to which the rupture disc 35 is subjected, the rupture disc ruptures and hydrogen gas is vented through a downstream conduit 39 to a containment box 42. The pressure and auto-ignition conditions in the downstream piping are measured by pressure sensor 37 and photodiode 38, and the flame structure inside the enclosure is measured by high velocity system 41, which transmits the data to data acquisition 40. The device is a closed type device, and the fifth manual stop valve 14 does not need to be installed. Combine this experimental facilities, the utility model discloses a working process as follows:
1. before and after the experiment, confirming a main valve of a combustible experimental gas cylinder 1, an inert gas cylinder 2, a first manual stop valve 7, a second manual stop valve 8, a fourth manual stop valve 15, a first pneumatic stop valve 9, a second pneumatic stop valve 10, a third pneumatic stop valve 12, a first pipeline pressure reducing valve 5 and a second pipeline pressure reducing valve 6 to be closed;
2. the third manual stop valve 18 is normally opened, a main valve of the inert gas cylinder 2 is opened before the experiment, and the pressure of the third pipeline pressure reducing valve 19 on the side of the electromagnetic valve is confirmed to reach the working pressure of 5bar by a pressure gauge;
3. and (3) tightness test: after the rupture disk 35 is installed, opening a main valve of the inert gas cylinder 2, pressing an opening button 28 of a second pneumatic stop valve 10 on the control box 20, adjusting a second pipeline pressure reducing valve 6 to enable a high-pressure cavity 33 to maintain pressure to a certain pressure value, pressing a closing button 29 of the second pneumatic stop valve 10 on the control box 20, detecting the tightness of the experimental device, opening a fourth manual stop valve 15 to release pressure after the tightness passes, then closing the stop valve, and closing the second pipeline pressure reducing valve 6;
4. vacuumizing: confirming that a main valve of an inert gas cylinder 2 is opened, pressing an opening button 30 and a vacuum pump opening button 24 of a third pneumatic stop valve 12 on a control box 20, and after vacuumizing is finished, sequentially pressing a closing button 31 and a vacuum pump closing button 25 of the third pneumatic stop valve 12 on the control box;
5. intermittent air supply for the experimental device: the general valve of the flammable experimental gas bottle 1 is opened, the opening button 26 of the first pneumatic stop valve 9 on the control box 20 is pressed, the first pipeline pressure reducing valve 5 is adjusted to break the rupture disk 35, and then the closing button 27 of the first pneumatic stop valve 9 is immediately pressed. And then, pressing an opening button 28 of the second pneumatic stop valve 10 on the control box 20, adjusting the second pipeline pressure reducing valve 6, blowing the pipeline by nitrogen, pressing a closing button 29 of the second pneumatic stop valve 10 on the control box 20, closing the first and second pipeline pressure reducing valves 5 and 6, and replacing the rupture disk 35 to perform the next group of experiments.
6. Replacing the combustible experimental gas bottle: the main valve of the combustible experimental gas bottle 1 is checked to be in a closed state, the first and fourth manual stop valves 7 and 15 are opened, the first pipeline pressure reducing valve 5 is adjusted to exhaust hydrogen in the pipeline (namely, when pressure gauges at two sides of the pipeline pressure reducing valve 5 are all displayed as 0), the first pipeline pressure reducing valve 5 is kept still, and a new gas bottle is replaced. And (3) installing a rupture disk 35, closing the fourth manual stop valve 15, opening a main valve of the inert gas cylinder 2, pressing an opening button 30 and an opening button 24 of the vacuum pump 13 of the third pneumatic stop valve 12 on the control box 20, closing the first manual stop valve 7 and the pipeline pressure reducing valve 5 after the vacuumizing is finished, and then sequentially pressing a closing button 31 and a closing button 25 of the vacuum pump 13 of the third pneumatic stop valve 12 on the control box 20. And opening a main valve of the flammable experimental gas bottle 1, and determining the total pressure in the flammable experimental gas bottle through a pipeline pressure reducing valve 5 and a pressure gauge at the side of the flammable experimental gas bottle.
7. Replacing the inert gas cylinder: and (3) checking that the main valve of the inert gas cylinder 2 is in a closed state, closing the third manual stop valve 18, opening the second manual stop valve 8, adjusting the second pipeline pressure reducing valve 6 to exhaust nitrogen in the pipeline (namely when pressure gauges on two sides of the second pipeline pressure reducing valve 6 all display 0), and replacing the new gas cylinder. And closing the second manual stop valve 8 and the second pipeline pressure reducing valve 6, opening a main valve of the inert gas cylinder 2, and determining the total pressure in the inert gas cylinder 2 through a gas cylinder side pressure meter of the second pipeline pressure reducing valve 6. The third manual shut-off valve 18 is opened and the third line pressure reducing valve 19 is adjusted to a pressure of approximately 5bar on the side of the solenoid valve.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. The utility model provides a safe conveyor of high pressure combustible experimental gas which characterized in that: the device comprises a gas cylinder group, a gas supply pipeline unit, a vacuumizing unit and a combustible gas alarm unit; the gas cylinder group and the gas supply pipeline unit are used for stably and continuously supplying gas or intermittently supplying gas into the laboratory equipment, and simultaneously can also provide a gas source for the detection of gas tightness before experiment and the promotion of tail gas discharge in the device after experiment, and the gas supply pipeline unit can perform full-range adjustment on gas pressure in the whole experiment process according to experiment requirements; the vacuumizing unit is used for extracting gas in the experimental device before the experiment; the combustible gas alarm unit is used for giving out sound and light alarms to remind of taking safety measures, exhausting air in a linkage mode and cutting off a power supply when the gas leakage concentration reaches the alarm concentration, and the safety of an experiment is guaranteed.
2. The device for safely transporting high-pressure combustible test gas according to claim 1, is characterized in that the device has the following specific structure: the gas cylinder group mainly comprises a combustible experimental gas cylinder (1) and an inert gas cylinder (2); the gas supply pipe unit mainly comprises a first filter (3), a second filter (4), a first pipeline pressure reducing valve (5), a second pipeline pressure reducing valve (6), a third pipeline pressure reducing valve (19), a first manual stop valve (7), a second manual stop valve (8), a third manual stop valve (18), a fourth manual stop valve (15), a fifth manual stop valve (14), a first pneumatic stop valve (9), a second pneumatic stop valve (10), a third pneumatic stop valve (12), a pressure transmitter (11), a control box (20) and a metal pipeline; the combustible experimental gas cylinder (1) is connected with a first filter (3), a first pipeline pressure reducing valve (5), a first pneumatic stop valve (9), a first manual stop valve (7) and a pressure transmitter (11) which are connected in parallel through pipelines, the inert gas cylinder (2) is connected with a second filter (4), a second pipeline pressure reducing valve (6), a second pneumatic stop valve (10) and a second manual stop valve (8) which is connected in parallel with the inert gas cylinder through pipelines, and the two pipelines are connected in parallel; the evacuation pipe is controlled by a fourth manual stop valve (15), is connected with a combustible gas and inert gas pipeline and is converged on a main high-pressure pipeline (16) and is used for discharging gas in the device; 2 pressure gauges are arranged on the connecting sides of the first pipeline pressure reducing valve (5), the second pipeline pressure reducing valve (6) and the third pipeline pressure reducing valve (19) and the gas cylinder and the main pipeline, and respectively display the pressure in the gas cylinder and the pressure in the pipeline; the control box (20) is provided with a plurality of electromagnetic valve switches for controlling the opening and closing of the first pneumatic stop valve (9), the second pneumatic stop valve (10) and the third pneumatic stop valve (12), the box body is connected with the inert gas cylinder (2) through the third manual stop valve (18), the third pipeline pressure reducing valve (19) and a metal pipeline, and the inert gas cylinder (2) and the third pipeline pressure reducing valve (19) provide pressure required in the control box; the pressure transmitter (11) is used for judging whether the pressure maintaining of the equipment is successful or not when the combustible gas continuously supplies gas to the experimental equipment; the vacuum pumping system comprises a third pneumatic stop valve (12) and a vacuum pump (13) with a vacuum meter, wherein the vacuum pump (13) with the vacuum meter is connected with the third pneumatic stop valve (12) through a pipeline and then is connected to a main high-pressure pipeline (16) through a pipeline; the opening and closing of the third pneumatic stop valve (12) and the vacuum pump (13) are controlled by corresponding electromagnetic valves in the control box (20): an opening button (30) of a third pneumatic stop valve (12), a closing button (31) of the third pneumatic stop valve (12), a vacuum pump opening button (24) and a vacuum pump closing button (25); the combustible gas alarm unit comprises a gas detector (21) and a gas alarm controller (22); when combustible gas leaks, the alarm acts to give out sound and light alarm and output electric signals; an emergency braking button (32) is arranged in the control box, and when the system alarms, an experimenter can press the button to enable an electromagnetic valve in the control box to act, close a pneumatic control valve on an air supply pipeline and cut off the air pipeline; meanwhile, the gas alarm controller (22) receives an electric signal, and exhaust air in a linkage manner and cut off the power supply to close the electromagnetic valve so as to cut off the gas circuit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654375A (en) * | 2019-01-30 | 2019-04-19 | 中国科学技术大学 | A kind of safe feeding device and its air supply method of high pressure combustibility experimental gas |
| CN111750163A (en) * | 2020-07-15 | 2020-10-09 | 浙江挺宇流体设备股份有限公司 | Emergency cut-off pneumatic control system |
| CN114113488A (en) * | 2021-12-02 | 2022-03-01 | 西南石油大学 | High pressure hydrogen-doped natural gas pipeline leakage spontaneous combustion experimental device |
| CN115307061A (en) * | 2022-08-18 | 2022-11-08 | 中车大同电力机车有限公司 | Gas circulation device and method for gas tightness test |
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2019
- 2019-01-30 CN CN201920160887.9U patent/CN209893115U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654375A (en) * | 2019-01-30 | 2019-04-19 | 中国科学技术大学 | A kind of safe feeding device and its air supply method of high pressure combustibility experimental gas |
| CN111750163A (en) * | 2020-07-15 | 2020-10-09 | 浙江挺宇流体设备股份有限公司 | Emergency cut-off pneumatic control system |
| CN114113488A (en) * | 2021-12-02 | 2022-03-01 | 西南石油大学 | High pressure hydrogen-doped natural gas pipeline leakage spontaneous combustion experimental device |
| CN114113488B (en) * | 2021-12-02 | 2023-06-27 | 西南石油大学 | Leakage spontaneous combustion experimental device for high-pressure hydrogen-doped natural gas pipeline |
| CN115307061A (en) * | 2022-08-18 | 2022-11-08 | 中车大同电力机车有限公司 | Gas circulation device and method for gas tightness test |
| CN115307061B (en) * | 2022-08-18 | 2024-06-11 | 中车大同电力机车有限公司 | Gas circulation device and method for air tightness test |
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