CN110887658A - Gas safety loop control method - Google Patents
Gas safety loop control method Download PDFInfo
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- CN110887658A CN110887658A CN201811033435.0A CN201811033435A CN110887658A CN 110887658 A CN110887658 A CN 110887658A CN 201811033435 A CN201811033435 A CN 201811033435A CN 110887658 A CN110887658 A CN 110887658A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention relates to the technical field of gas safety circuits, in particular to a gas safety circuit control method. The method at least comprises the following steps: at least one mass flowmeter is arranged between any two adjacent pneumatic valves on the gas safety loop, and whether the pneumatic valves are in failure or not is detected through the mass flowmeter. According to the gas safety loop control method provided by the invention, at least one mass flowmeter is arranged between any two adjacent pneumatic valves on the gas safety loop, and the monitoring signals of the mass flowmeters are used as feedback information to detect and judge whether the pneumatic valves are in failure, so that the operation is simple, the control is convenient, the working intensity is reduced, the cost is reduced, and the working safety of the loop is improved.
Description
Technical Field
The invention relates to the technical field of gas safety circuits, in particular to a gas safety circuit control method.
Background
On the vacuum system gas transmission pipeline in the tail gas pyrolysis equipment, a safety loop is usually arranged to ensure the working safety of the system. On the existing safety loop, a pneumatic valve with feedback is adopted for loop control, and whether the pneumatic valve is switched in place or not is determined through feedback so as to determine the safety of the loop. However, the safety loop has the defects of complex operation, inconvenient control, high cost and insufficient safety.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a gas safety loop control method, which solves the problems of complex operation, inconvenient control and insufficient safety of the existing safety loop.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a gas safety loop control method, which at least comprises the following steps: at least one mass flowmeter is arranged between any two adjacent pneumatic valves on the gas safety loop, and whether the pneumatic valves are in failure or not is detected through the mass flowmeter.
Specifically, two adjacent pneumatic valves are first pneumatic valve and second pneumatic valve respectively, first pneumatic valve with be equipped with one between the second pneumatic valve mass flow meter, first pneumatic valve mass flow meter with the second pneumatic valve sets gradually along the gas flow direction on the gas safety circuit.
Further, whether the first pneumatic valve and the second pneumatic valve are in failure or not is detected by monitoring flow signals of the mass flow meter respectively.
Further, whether the first pneumatic valve is in failure or not is detected through the mass flow meter, and the method specifically comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the first pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the first pneumatic valve is normal;
and S5, closing the second air-operated valve.
Specifically, if a flow signal exists in the mass flow meter, the first pneumatic valve is judged to be in fault, and a first pneumatic valve fault alarm signal is sent out.
Further, whether the second pneumatic valve is in failure or not is detected through the mass flow meter, and the method specifically comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the second pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the second pneumatic valve is normal;
and S5, closing the first pneumatic valve.
Specifically, in step S3, if there is a flow signal in the mass flow meter, it is determined that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
Further, whether the first pneumatic valve and the second pneumatic valve have faults or not is detected in sequence by monitoring a pressure signal and a flow signal of the mass flow meter, and the method specifically comprises the following steps:
s1, closing the first pneumatic valve and the second pneumatic valve simultaneously;
s2, opening the first pneumatic valve;
s3, monitoring whether a pressure signal exists in the mass flowmeter;
s4, if the pressure signal exists, judging that the first pneumatic valve is normal;
s5, opening the second pneumatic valve;
s6, monitoring whether a flow signal exists in the mass flowmeter;
and S7, if the flow signal exists, judging that the second air-operated valve is normal.
Specifically, in step S3, if there is no pressure signal in the mass flow meter, it is determined that the first pneumatic valve is out of order, and a first pneumatic valve failure alarm signal is issued.
Specifically, in step S6, if there is no flow signal in the mass flow meter, it is determined that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the gas safety loop control method provided by the invention, at least one mass flowmeter is arranged between any two adjacent pneumatic valves on the gas safety loop, and the monitoring signals of the mass flowmeters are used as feedback information to detect and judge whether the pneumatic valves are in failure, so that the operation is simple, the control is convenient, the working intensity is reduced, the cost is reduced, and the working safety of the loop is improved.
Drawings
FIG. 1 is a flow chart of a gas safety loop control method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a gas safety loop control method according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a method for controlling a three-gas safety loop according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a gas safety loop control method, which at least comprises the following steps: the mass flow meter is arranged between any two pneumatic valves on the gas safety loop, and the method detects and judges whether the pneumatic valves break down or not by taking monitoring signals of the mass flow meter as feedback information.
The gas safety circuit control method according to the present invention will be specifically described below with reference to specific examples.
Example one
As shown in fig. 1, an embodiment of the present invention provides a method for controlling a gas safety loop, which specifically includes the following steps:
firstly, a mass flow meter is arranged between any two adjacent pneumatic valves on a gas safety loop, the two adjacent pneumatic valves are respectively a first pneumatic valve and a second pneumatic valve, and the first pneumatic valve, the mass flow meter and the second pneumatic valve are sequentially arranged on the gas safety loop along the gas flow direction.
Then, whether the first pneumatic valve has a fault is detected through the mass flow meter, and the method specifically comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the first pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the first pneumatic valve is normal;
and S5, closing the second air-operated valve.
In step S3, if there is a flow signal in the mass flow meter, it is determined that the first pneumatic valve has a fault, and a first pneumatic valve fault alarm signal is sent.
According to the gas safety loop control method provided by the embodiment of the invention, the first pneumatic valve is closed under the condition that the two pneumatic valves are opened, then whether the first pneumatic valve is closed in place or not is judged by monitoring the flow change of the mass flow meter, if the first pneumatic valve is not closed in place, the first pneumatic valve can be judged to be in fault, an alarm is given, and the first pneumatic valve is replaced, so that the working safety of the loop is ensured.
Example two
As shown in fig. 2, an embodiment of the present invention further provides a gas safety loop control method, which specifically includes the following steps:
firstly, a mass flow meter is arranged between any two adjacent pneumatic valves on a gas safety loop, the two adjacent pneumatic valves are respectively a first pneumatic valve and a second pneumatic valve, and the first pneumatic valve, the mass flow meter and the second pneumatic valve are sequentially arranged on the gas safety loop along the gas flow direction.
Then, whether the second pneumatic valve is in failure is detected through the mass flow meter, and the method specifically comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the second pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the second pneumatic valve is normal;
and S5, closing the first pneumatic valve.
In step S3, if there is a flow signal in the mass flow meter, it is determined that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
According to the gas safety loop control method provided by the embodiment of the invention, under the condition that the two pneumatic valves are both opened, the second pneumatic valve is closed firstly, then whether the second pneumatic valve is closed in place or not is judged by monitoring the flow change of the mass flow meter, if the second pneumatic valve is not closed in place, the second pneumatic valve can be judged to be in fault, and then an alarm is given to replace the second pneumatic valve, so that the working safety of the loop is ensured.
EXAMPLE III
As shown in fig. 3, an embodiment of the present invention further provides a gas safety loop control method, which specifically includes the following steps:
firstly, a mass flow meter is arranged between any two adjacent pneumatic valves on a gas safety loop, the two adjacent pneumatic valves are respectively a first pneumatic valve and a second pneumatic valve, and the first pneumatic valve, the mass flow meter and the second pneumatic valve are sequentially arranged on the gas safety loop along the gas flow direction.
Then, through monitoring mass flow meter's pressure signal and flow signal detect in proper order first pneumatic valve with whether the second pneumatic valve breaks down, specifically include:
s1, closing the first pneumatic valve and the second pneumatic valve simultaneously;
s2, opening the first pneumatic valve;
s3, monitoring whether a pressure signal exists in the mass flowmeter;
s4, if the pressure signal exists, judging that the first pneumatic valve is normal;
s5, opening the second pneumatic valve;
s6, monitoring whether a flow signal exists in the mass flowmeter;
and S7, if the flow signal exists, judging that the second air-operated valve is normal.
In step S3, if there is no pressure signal in the mass flow meter, it is determined that the first pneumatic valve has a fault, and a first pneumatic valve fault alarm signal is sent.
In step S6, if there is no flow signal in the mass flow meter, it is determined that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
According to the gas safety loop control method, under the condition that two pneumatic valves are closed, the first pneumatic valve is opened, then whether the first pneumatic valve breaks down or not is judged by monitoring the pressure change of the mass flowmeter, on the premise that the first pneumatic valve is judged to be normal, the second pneumatic valve is opened, and then whether the second pneumatic valve breaks down or not is judged by monitoring the flow change of the mass flowmeter. When any pneumatic valve is judged to be in fault, an alarm is given in time to replace the pneumatic valve, so that the working safety of the loop is ensured.
In addition, in each of the above embodiments, two or more mass flowmeters may be further disposed on the gas safety loop, as long as it is ensured that the mass flowmeters are all disposed between two adjacent pneumatic valves, when a failure of a pneumatic valve is determined, a monitoring signal of one of the mass flowmeters may be referred to as feedback information, or monitoring signals of two or more mass flowmeters may be referred to as feedback information at the same time, and a control method of the gas safety loop is the same as the principle of each of the above embodiments, and is not described herein again. Through setting up two and above mass flow meter, when can avoiding a mass flow meter to break down, can carry out normal work through other mass flow meters, further improved safety circuit's security performance.
In summary, in the gas safety loop control method according to the embodiment of the present invention, at least one mass flow meter is disposed between any two adjacent pneumatic valves on the gas safety loop, and a monitoring signal of the mass flow meter is used as feedback information to detect and judge whether the pneumatic valve fails, so that the method is simple to operate and convenient to control, not only reduces the working strength, but also reduces the cost, and improves the safety of the loop operation.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, unless otherwise specified, "a plurality" means one or more; "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the machine or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A gas safety loop control method is characterized by at least comprising the following steps: at least one mass flowmeter is arranged between any two adjacent pneumatic valves on the gas safety loop, and whether the pneumatic valves are in failure or not is detected through the mass flowmeter.
2. The gas safety circuit control method according to claim 1, wherein the two adjacent pneumatic valves are a first pneumatic valve and a second pneumatic valve, respectively, one mass flow meter is provided between the first pneumatic valve and the second pneumatic valve, and the first pneumatic valve, the mass flow meter, and the second pneumatic valve are sequentially provided on the gas safety circuit in a gas flow direction.
3. The gas safety circuit control method according to claim 2, wherein whether the first pneumatic valve and the second pneumatic valve are malfunctioning, respectively, is detected by monitoring a flow signal of the mass flow meter.
4. The gas safety loop control method of claim 3, wherein detecting whether the first pneumatic valve is malfunctioning via the mass flow meter comprises:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the first pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the first pneumatic valve is normal;
and S5, closing the second air-operated valve.
5. The gas safety loop control method of claim 4, wherein in step S3, if there is a flow signal in the mass flow meter, it is determined that the first pneumatic valve is malfunctioning, and a first pneumatic valve malfunction alarm signal is issued.
6. The gas safety circuit control method according to claim 3, characterized in that detecting whether the second pneumatic valve is malfunctioning by the mass flow meter comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve simultaneously;
s2, closing the second pneumatic valve;
s3, monitoring whether a flow signal exists in the mass flowmeter;
s4, if the mass flowmeter has no flow signal, judging that the second pneumatic valve is normal;
and S5, closing the first pneumatic valve.
7. The gas safety circuit control method as claimed in claim 6, wherein in step S3, if there is a flow signal in the mass flow meter, it is judged that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
8. The gas safety circuit control method according to claim 2, wherein whether the first pneumatic valve and the second pneumatic valve are in failure is sequentially detected by monitoring a pressure signal and a flow signal of the mass flow meter, and the method specifically comprises the following steps:
s1, closing the first pneumatic valve and the second pneumatic valve simultaneously;
s2, opening the first pneumatic valve;
s3, monitoring whether a pressure signal exists in the mass flowmeter;
s4, if the pressure signal exists, judging that the first pneumatic valve is normal;
s5, opening the second pneumatic valve;
s6, monitoring whether a flow signal exists in the mass flowmeter;
and S7, if the flow signal exists, judging that the second air-operated valve is normal.
9. The gas safety loop control method of claim 8, wherein in step S3, if there is no pressure signal in the mass flow meter, it is determined that the first pneumatic valve is malfunctioning, and a first pneumatic valve malfunction warning signal is issued.
10. The gas safety circuit control method as claimed in claim 8, wherein in step S6, if there is no flow signal in the mass flow meter, it is judged that the second pneumatic valve is malfunctioning, and a second pneumatic valve malfunction warning signal is issued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033435.0A CN110887658A (en) | 2018-09-05 | 2018-09-05 | Gas safety loop control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033435.0A CN110887658A (en) | 2018-09-05 | 2018-09-05 | Gas safety loop control method |
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| Publication Number | Publication Date |
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| CN110887658A true CN110887658A (en) | 2020-03-17 |
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| CN201811033435.0A Pending CN110887658A (en) | 2018-09-05 | 2018-09-05 | Gas safety loop control method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2612872A1 (en) * | 1976-03-26 | 1978-05-11 | Hariri Ali Asghar | Fail-safe valve for air-brake - has inertial valve to block defective circuit in response to output of flow monitor |
| JPS5676767A (en) * | 1979-11-26 | 1981-06-24 | Hitachi Ltd | Detecting method for abnormality in swing-type nonreturn valve |
| TW422919B (en) * | 2000-05-26 | 2001-02-21 | Taiwan Semiconductor Mfg | Method for detecting leakage of pneumatic valve |
| DE10247167A1 (en) * | 2002-10-10 | 2004-04-22 | Karl Dungs Gmbh & Co. Kg | Leak testing device for valves, especially gas safety valves, determines leakage rate of at least one valve within measurement step from at least two signals characterizing detected pressure |
| DE102012206810A1 (en) * | 2011-04-29 | 2012-10-31 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | SYSTEM AND METHOD FOR DIAGNOSING A VALVE LID IN A VEHICLE |
| US20160069772A1 (en) * | 2014-09-10 | 2016-03-10 | Siemens Aktiengesellschaft | Valve Operation And Diagnosis |
| CN206990177U (en) * | 2017-06-28 | 2018-02-09 | 中广核核电运营有限公司 | Pneumatic operated valve mechanical performance detection means and detecting system |
-
2018
- 2018-09-05 CN CN201811033435.0A patent/CN110887658A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2612872A1 (en) * | 1976-03-26 | 1978-05-11 | Hariri Ali Asghar | Fail-safe valve for air-brake - has inertial valve to block defective circuit in response to output of flow monitor |
| JPS5676767A (en) * | 1979-11-26 | 1981-06-24 | Hitachi Ltd | Detecting method for abnormality in swing-type nonreturn valve |
| TW422919B (en) * | 2000-05-26 | 2001-02-21 | Taiwan Semiconductor Mfg | Method for detecting leakage of pneumatic valve |
| DE10247167A1 (en) * | 2002-10-10 | 2004-04-22 | Karl Dungs Gmbh & Co. Kg | Leak testing device for valves, especially gas safety valves, determines leakage rate of at least one valve within measurement step from at least two signals characterizing detected pressure |
| DE102012206810A1 (en) * | 2011-04-29 | 2012-10-31 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | SYSTEM AND METHOD FOR DIAGNOSING A VALVE LID IN A VEHICLE |
| US20160069772A1 (en) * | 2014-09-10 | 2016-03-10 | Siemens Aktiengesellschaft | Valve Operation And Diagnosis |
| CN206990177U (en) * | 2017-06-28 | 2018-02-09 | 中广核核电运营有限公司 | Pneumatic operated valve mechanical performance detection means and detecting system |
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| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 102209 Beijing City, Changping District Beiqijia Town, Tivoli Park No. 15 Applicant after: DONGTAI HI-TECH EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: 102209 Beijing City, Changping District Beiqijia Town, Tivoli Park No. 15 Applicant before: DONGTAI HI-TECH EQUIPMENT TECHNOLOGY (BEIJING) Co.,Ltd. |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210308 Address after: Unit 611, unit 3, 6 / F, building 1, yard 30, Yuzhi East Road, Changping District, Beijing 102208 Applicant after: Zishi Energy Co.,Ltd. Address before: 102209 Beijing City, Changping District Beiqijia Town, Tivoli Park No. 15 Applicant before: DONGTAI HI-TECH EQUIPMENT TECHNOLOGY Co.,Ltd. |
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Application publication date: 20200317 |