CN113188054A - Secondary gas taking device for hazardous gas - Google Patents
Secondary gas taking device for hazardous gas Download PDFInfo
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- CN113188054A CN113188054A CN202110544049.3A CN202110544049A CN113188054A CN 113188054 A CN113188054 A CN 113188054A CN 202110544049 A CN202110544049 A CN 202110544049A CN 113188054 A CN113188054 A CN 113188054A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The invention discloses a secondary gas taking device for dangerous gas, which comprises a central control unit, a pressure reducing gas taking unit, an early warning unit and an aerodynamic unit, wherein the central control unit controls a pneumatic stop valve and a pressure reducing valve, secondary pressure reduction of the dangerous high-pressure gas is realized, and the purpose of automatic and safe gas taking of a user is achieved. The early warning unit monitors the whole device for taking gas from the gas source to a user in real time, the leakage condition of the dangerous gas is fed back to the central control unit in real time, the central control unit automatically cuts off the gas source at the first time, the residual gas in the device is automatically emptied through the safety discharge port, and the purpose of automatic pressure relief in an extreme environment can be achieved. The invention has the advantages of high automation degree, simple operation, real-time early warning, high safety performance and high automation degree.
Description
Technical Field
The invention relates to the technical field of hazardous gas production and transportation, in particular to a secondary gas taking device for hazardous gas.
Background
The dangerous gas mainly comprises flammable, explosive and easy-to-poison gas, such as carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen oxide, phosphine, methane and the like, and in recent years, serious accidents caused by the dangerous gas occur in domestic laboratories. The safety responsibility is focused on Mount Tai, and how to correctly use the dangerous gas draws more and more attention of people. With the rapid development of the existing information technology, an intelligent laboratory which can automatically warn and automatically eliminate hidden dangers is constructed to gradually schedule, safety accidents are controlled from the source, and green management of the laboratory is imperative.
At present, a laboratory generally adopts an additionally-installed video monitoring system, a dangerous gas alarm and the like to prevent dangerous gas, and increases the audit of purchasing, using and the like of the dangerous gas. However, video monitoring only can play a role in restoring accident sites, and the dangerous gas alarm only can play a role in warning workers on the site and cannot cut off dangerous sources at the first time. In addition, if extreme accidents such as fire occur in a laboratory, high-pressure steel cylinders filled with dangerous gas become a further serious accident source, and they may cause secondary accidents due to explosion or leakage caused by high temperature and the like.
Disclosure of Invention
The invention aims to provide a secondary gas taking device for hazardous gas aiming at the defects of the prior art, the hazardous gas is conveyed to a user outlet end after being decompressed twice through a primary pressure reducing valve and a secondary pressure reducing valve, and the danger that the leakage is easy to occur due to too large pressure difference of primary pressure reduction is avoided; the invention adopts the central control unit to realize the automation of gas taking, realize the automatic gas supply and the automatic gas source closing; the invention is provided with the early warning device, can automatically release pressure and automatically switch to the safe discharge port in emergency, avoids the occurrence of accidents, and can also be connected to an intelligent early warning system in a laboratory. The invention has the advantages of simple structure, convenient use, high safety performance and high automation degree.
The specific technical scheme for realizing the purpose of the invention is as follows:
a two-stage gas taking device for hazardous gas is characterized by comprising a central control unit, a pressure reduction gas taking unit, an early warning unit and an aerodynamic unit;
the central control unit consists of a programmable central processor and a digital display controller, and a plurality of signal ends are arranged on the digital display controller;
the pressure-reducing gas-taking unit consists of a primary pressure-reducing valve, a pneumatic two-way stop valve, a pneumatic three-way stop valve, a safety discharge port, a secondary pressure-reducing valve, a user outlet end, an electromagnetic pressure-reducing valve, a one-way valve and a three-way valve;
an outlet of a pneumatic two-way stop valve on the pressure-reducing gas-taking unit is connected with an inlet of an electromagnetic pressure-relief valve, the electromagnetic pressure-relief valve is provided with two outlets, a first outlet is connected with an inlet of a first-stage pressure-reducing valve, a second outlet is connected with a first channel of a three-way valve, and a second channel of the three-way valve is connected with a safe discharge port; the outlet of the first-stage pressure reducing valve is connected with the inlet of the pneumatic three-way stop valve, two outlets are arranged on the pneumatic three-way stop valve, the first outlet is connected with the inlet of the second-stage pressure reducing valve, the second outlet is connected with the inlet of the one-way valve, and the outlet of the one-way valve is connected with the third channel of the three-way valve; the outlet of the secondary pressure reducing valve is connected with the outlet end of a user;
the early warning unit consists of a first alarm, a second alarm, a third alarm and a fourth alarm, and the first alarm, the second alarm, the third alarm and the fourth alarm are respectively connected with the signal end of the digital display controller through data lines;
the air power unit is composed of an air pump assembly; wherein, the output end of the air pump is respectively connected with the pneumatic two-way stop valve and the pneumatic three-way stop valve;
the central control unit is respectively connected with the first-stage pressure reducing valve, the pneumatic two-way stop valve, the pneumatic three-way stop valve, the second-stage pressure reducing valve and the electromagnetic pressure relief valve through data lines via a signal end on the digital display controller.
The first alarm, the second alarm, the third alarm and the fourth alarm of the early warning unit are distributed at different points in the decompression gas taking unit; the first alarm is arranged at the inlet of the first-stage pressure reducing valve, the second alarm is arranged between the pneumatic three-way stop valve and the second-stage pressure reducing valve, the third alarm is arranged at the outlet of the second-stage pressure reducing valve, and the fourth alarm is arranged at the inlet of the pneumatic two-way stop valve; the first alarm, the second alarm and the third alarm are gas alarms, and the fourth alarm is a temperature alarm.
The dangerous gas is subjected to pressure reduction twice through the first-stage pressure reducing valve and the second-stage pressure reducing valve and then is conveyed to the outlet end of a user, so that the danger that the leakage is easy to occur due to too large pressure difference of the first-stage pressure reduction is avoided; the invention adopts the central control unit to realize the automation of gas taking, realize the automatic gas supply and the automatic gas source closing; the invention is provided with the early warning device, can automatically release pressure and automatically switch to the safe discharge port in emergency, avoids the occurrence of accidents, and can also be connected to an intelligent early warning system in a laboratory. The invention has the advantages of simple structure, convenient use, high safety performance and high automation degree.
Compared with the prior art, the invention has the following different points and advantages:
the invention conveys the dangerous gas to the outlet end of a user after the dangerous gas is decompressed twice through the primary decompression valve and the secondary decompression valve, realizes the secondary decompression of the dangerous high-pressure gas, avoids the danger that the leakage is easy to occur due to the overlarge pressure difference of the primary decompression, and achieves the purpose of automatically and safely taking gas by the user
The invention realizes the purposes of automatic early warning, automatic pressure relief and safe discharge while realizing the automatic gas taking and using of the dangerous gas.
The invention realizes full automation of the gas taking process, and avoids the harm of dangerous gas to operators in close-range operation;
the automatic emptying device is additionally arranged, so that the automatic emptying device can be used for automatic gas washing and discharging the washed dangerous gas from the safe discharge port, and meanwhile, after the automatic emptying device is used, the residual dangerous gas in the pipeline is also emptied through the safe discharge port, so that the poisoning of operators and the pollution to the environment caused by the dangerous gas are avoided;
the electromagnetic pressure relief valve and the early warning unit are added, when the early warning unit detects that the working environment temperature is higher than 80 ℃, the electromagnetic pressure relief valve automatically and rapidly unloads, and the dangerous gas is decompressed and exhausted through the safe exhaust port, so that the occurrence probability of secondary accidents is reduced;
the invention has the advantages of high safety, simple structure, convenient use and strong user experience.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a control schematic framework diagram of the central control unit and the early warning unit according to the present invention.
Detailed Description
Referring to fig. 1 and 2, the present invention includes a central control unit 8, a pressure reduction gas extraction unit, an early warning unit 9 and an aerodynamic unit;
the central control unit 8 is composed of a programmable central processor 81 and a digital display controller 82, and a plurality of signal ends are arranged on the digital display controller 82;
the pressure-reducing gas-taking unit consists of a primary pressure-reducing valve 2, a pneumatic two-way stop valve 3, a pneumatic three-way stop valve 4, a safety discharge port 5, a secondary pressure-reducing valve 6, a user outlet end 7, an electromagnetic pressure-reducing valve 15, a one-way valve 16 and a three-way valve 17;
an outlet of the pneumatic two-way stop valve 3 on the pressure-reducing gas-taking unit is connected with an inlet of an electromagnetic pressure-releasing valve 15, the electromagnetic pressure-releasing valve 15 is provided with two outlets, wherein a first outlet is connected with an inlet of the first-stage pressure-reducing valve 2, a second outlet is connected with a first channel of a three-way valve 17, and a second channel of the three-way valve 17 is connected with a safety discharge port 5; an outlet of the primary pressure reducing valve 2 is connected with an inlet of a pneumatic three-way stop valve 4, two outlets are arranged on the pneumatic three-way stop valve 4, wherein a first outlet is connected with an inlet of the secondary pressure reducing valve 6, a second outlet is connected with an inlet of a one-way valve 16, and an outlet of the one-way valve 16 is connected with a third channel of a three-way valve 17; the outlet of the secondary pressure reducing valve 6 is connected to a user outlet port 7.
Referring to fig. 1 and 2, the early warning unit 9 is composed of a first alarm 11, a second alarm 12, a third alarm 13 and a fourth alarm 14, and the first alarm 11, the second alarm 12, the third alarm 13 and the fourth alarm 14 are respectively connected with a signal end of a digital display controller 82 through data lines.
Referring to fig. 1, the aerodynamic unit is formed by an air pump assembly; wherein, the output end of the air pump 10 is respectively connected with the pneumatic two-way stop valve 3 and the pneumatic three-way stop valve 4.
Referring to fig. 1 and 2, the central control unit 8 is connected to the first-stage pressure reducing valve 2, the pneumatic two-way stop valve 3, the pneumatic three-way stop valve 4, the second-stage pressure reducing valve 6 and the electromagnetic pressure relief valve 15 through data lines via a signal end of the digital display controller 82.
Referring to fig. 1 and 2, a first alarm 11, a second alarm 12, a third alarm 13 and a fourth alarm 14 of the early warning unit 9 are distributed at different points in the decompression gas taking unit; the first alarm 11 is arranged at the inlet of the first-stage pressure reducing valve 2, the second alarm 12 is arranged between the pneumatic three-way stop valve 4 and the second-stage pressure reducing valve 6, the third alarm 13 is arranged at the outlet of the second-stage pressure reducing valve 6, and the fourth alarm 14 is arranged at the inlet of the pneumatic two-way stop valve 3; the first alarm 11, the second alarm 12 and the third alarm 13 are gas alarms, and the fourth alarm 14 is a temperature alarm.
The invention will be further described with reference to the following drawings and examples, which are not intended to limit the scope of the invention.
Examples
Referring to fig. 1 and 2, the hazardous gas 1 of the present invention adopts a 40L carbon monoxide steel cylinder with a pressure of 15MPa, and an outlet of the carbon monoxide steel cylinder is connected with an inlet of a pneumatic two-way stop valve 3; the outlet of the secondary pressure reducing valve 6 is connected with a user outlet end 7;
checking that the pneumatic three-way stop valve 4, the one-way valve 16 and the three-way valve 17 are connected to the safe discharge port 5 completely; the electromagnetic pressure relief valve 15 and the three-way valve 17 are checked to be connected with the safe discharge port 5 completely;
starting a programmable central processing unit 81 and a digital display controller 82 of the central control unit;
starting an air pump assembly of the air power unit; the working pressure of the air pump 10 was checked to be 0.7 MPa.
Referring to fig. 1 and 2, in operation, the programmable central processing unit 81 and the digital display controller 82 control the pneumatic two-way stop valve 3 to open, the first outlet of the pneumatic three-way stop valve 4 connected with the second-stage pressure reducing valve 6 is opened, the hazardous gas 1 is subjected to primary pressure reduction through the first-stage pressure reducing valve 2, the pressure is reduced to 1MPa, the pressure is reduced through the pneumatic three-way stop valve 4 and subjected to secondary pressure reduction through the second-stage pressure reducing valve 6, the pressure is further reduced to 0.02MPa, and finally the hazardous gas reaches the user outlet end 7, so that the gas is convenient for a user to take gas, and the pressure reduction and the gas supply of the hazardous gas 1 are completed.
Referring to fig. 1 and 2, the invention is provided with a safety discharge port 5 in the pressure reduction gas taking unit to realize the collection or the safety discharge of the dangerous gas 1, and the invention works specifically as follows, when the device stops conveying gas, the central processor 81 and the digital display controller 82 can be programmed to control the pneumatic two-way stop valve 3 to be closed, at this time, the user outlet end 7 is closed at the same time, the digital display controller 82 controls the first outlet of the pneumatic three-way stop valve 4 to be closed, meanwhile, the second outlet connected with the one-way valve 16 is opened, and the dangerous gas 1 remained in the device is collected or safely discharged through the safety discharge port 5 via the one-way valve 16 and the three-way valve 17;
in addition, the electromagnetic pressure relief valve 15 is arranged in the pressure reducing and gas taking unit, when the programmable central processor 81 and the digital display controller 82 detect that the working environment temperature of the device is higher than 80 ℃ in emergency, the digital display controller 82 controls the second outlet of the electromagnetic pressure relief valve 15 to be opened, the device is unloaded and emptied, the dangerous gas 1 is collected or safely discharged through the safe discharge port 5 through the first channel and the second channel of the three-way valve 17, and secondary accidents are avoided.
Referring to fig. 1 and 2, in the invention, a first alarm 11, a second alarm 12, a third alarm 13 and a fourth alarm 14 of an early warning unit are distributed at different points in a decompression gas taking unit; and the detection information of the first alarm 11, the second alarm 12, the third alarm 13 and the fourth alarm 14 is respectively transmitted to the digital display controller 82 and the programmable central processing unit 81 through data lines; the first alarm 11, the second alarm 12 and the third alarm 13 are gas alarms and mainly monitor leakage of the device, and the fourth alarm 14 is a temperature alarm and mainly monitors working environment temperature of the device.
Referring to fig. 1, the electromagnetic pressure release valve 15 in the embodiment of the present invention is a smoke bench positive-phase electromagnetic pressure release valve; the first alarm 11, the second alarm 12 and the third alarm 13 are used as alarms for praying carbon monoxide; the fourth alarm 14 is a Pottek temperature alarm, and gives an alarm when the temperature is detected to be more than or equal to 80 ℃ and transmits signals to the digital display controller 82 and the programmable central processing unit 81.
Referring to fig. 1, the central control unit in the embodiment of the present invention is composed of a programmable central processing unit 81 and a digital display controller 82, wherein the programmable central processing unit 81 is an S7-200 programmable central processing unit, and the digital display controller 82 is a West-8100 digital display controller.
Referring to fig. 1, a Parker pneumatic two-way stop valve and a Parker pneumatic three-way stop valve are selected as a pneumatic two-way stop valve 3 and a pneumatic three-way stop valve 4 in the embodiment of the invention; the working pressure of the air pump 10 of the air power unit is 0.7 MPa; inert gases may also be used, such as: nitrogen gas N2The pressure range is 0.4-1.0 MPa; compressed air or nitrogen N2And a driving force is provided for opening, closing or transposition of the pneumatic two-way stop valve 3 and the pneumatic three-way stop valve 4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be accorded the full scope and spirit of the appended claims so as to embrace any and all such modifications, equivalents, and improvements.
Claims (2)
1. A two-stage gas taking device for hazardous gas is characterized by comprising a central control unit (8), a pressure reduction gas taking unit, an early warning unit (9) and an aerodynamic unit;
the central control unit (8) is composed of a programmable central processing unit (81) and a digital display controller (82), and a plurality of signal ends are arranged on the digital display controller (82);
the pressure-reducing gas-taking unit consists of a primary pressure-reducing valve (2), a pneumatic two-way stop valve (3), a pneumatic three-way stop valve (4), a safety discharge port (5), a secondary pressure-reducing valve (6), a user outlet end (7), an electromagnetic pressure-reducing valve (15), a one-way valve (16) and a three-way valve (17);
an outlet of a pneumatic two-way stop valve (3) on the pressure-reducing gas-taking unit is connected with an inlet of an electromagnetic pressure-releasing valve (15), the electromagnetic pressure-releasing valve (15) is provided with two outlets, wherein a first outlet is connected with an inlet of a first-stage pressure-reducing valve (2), a second outlet is connected with a first channel of a three-way valve (17), and a second channel of the three-way valve (17) is connected with a safety discharge port (5); an outlet of the primary pressure reducing valve (2) is connected with an inlet of a pneumatic three-way stop valve (4), two outlets are arranged on the pneumatic three-way stop valve (4), a first outlet is connected with an inlet of the secondary pressure reducing valve (6), a second outlet is connected with an inlet of a one-way valve (16), and an outlet of the one-way valve (16) is connected with a third channel of a three-way valve (17); the outlet of the secondary pressure reducing valve (6) is connected with a user outlet end (7);
the early warning unit (9) is composed of a first alarm (11), a second alarm (12), a third alarm (13) and a fourth alarm (14), and the first alarm (11), the second alarm (12), the third alarm (13) and the fourth alarm (14) are respectively connected with the signal end of the digital display controller (82) through data lines;
the air power unit is composed of an air pump assembly; wherein, the output end of the air pump (10) is respectively connected with the pneumatic two-way stop valve (3) and the pneumatic three-way stop valve (4);
the central control unit (8) is connected with the primary pressure reducing valve (2), the pneumatic two-way stop valve (3), the pneumatic three-way stop valve (4), the secondary pressure reducing valve (6) and the electromagnetic pressure relief valve (15) through data lines at a signal end on the digital display controller (82).
2. The secondary gas taking device for the hazardous gas according to claim 1, wherein the first alarm (11), the second alarm (12), the third alarm (13) and the fourth alarm (14) of the early warning unit (9) are distributed at different points in the decompression gas taking unit; the first alarm (11) is arranged at the inlet of the first-stage pressure reducing valve (2), the second alarm (12) is arranged between the pneumatic three-way stop valve (4) and the second-stage pressure reducing valve (6), the third alarm (13) is arranged at the outlet of the second-stage pressure reducing valve (6), and the fourth alarm (14) is arranged at the inlet of the pneumatic two-way stop valve (3); the first alarm (11), the second alarm (12) and the third alarm (13) are gas alarms, and the fourth alarm (14) is a temperature alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544049.3A CN113188054A (en) | 2021-05-19 | 2021-05-19 | Secondary gas taking device for hazardous gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544049.3A CN113188054A (en) | 2021-05-19 | 2021-05-19 | Secondary gas taking device for hazardous gas |
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| CN113188054A true CN113188054A (en) | 2021-07-30 |
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| CN202110544049.3A Pending CN113188054A (en) | 2021-05-19 | 2021-05-19 | Secondary gas taking device for hazardous gas |
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| CN211424007U (en) * | 2019-12-03 | 2020-09-04 | 杰瑞(天津)石油工程技术有限公司 | Pressure control system |
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2021
- 2021-05-19 CN CN202110544049.3A patent/CN113188054A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352961A (en) * | 2011-07-27 | 2012-02-15 | 北京万源瀚德汽车密封系统有限公司 | Gas pressure stabilizing system |
| CN102720946A (en) * | 2012-03-28 | 2012-10-10 | 上海启元气体发展有限公司 | Stable gas supply method |
| CN205155552U (en) * | 2015-12-03 | 2016-04-13 | 山东吉威医疗制品有限公司 | Incessant steady voltage system of nitrogen gas |
| CN205299082U (en) * | 2015-12-28 | 2016-06-08 | 保定市北方特种气体有限公司 | Gaseous supply line system |
| CN207814943U (en) * | 2017-10-16 | 2018-09-04 | 湖南旭博冶金科技有限公司 | Gas-atomized powder high-pressure air source control system |
| CN108652688A (en) * | 2018-07-30 | 2018-10-16 | 鹰利视医疗科技有限公司 | A kind of pneumoperitoneum apparatus and its voltage stabilizing control method with voltage stabilizing function |
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Application publication date: 20210730 |