CN210953961U - Gas multi-path online monitoring system - Google Patents
Gas multi-path online monitoring system Download PDFInfo
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- CN210953961U CN210953961U CN201921461821.XU CN201921461821U CN210953961U CN 210953961 U CN210953961 U CN 210953961U CN 201921461821 U CN201921461821 U CN 201921461821U CN 210953961 U CN210953961 U CN 210953961U
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Abstract
The utility model provides a gaseous multichannel on-line monitoring system, through setting up many sampling branch roads to realize the gaseous sampling to a plurality of positions, can carry out the omnidirectional monitoring to the site environment, realize the control to the break-make of each sampling branch road through controlling the electric control switch on each sampling branch road simultaneously, open the electric control switch of corresponding branch road when needing to monitor to some positions, and close the electric control switch of the surplus branch road, realize the accurate monitoring to gas; still through setting up the partial pressure branch road, the automatically controlled switch on the control partial pressure branch road is opened when detecting high pressure environment to discharge a certain amount of gas, can effectively adjust the gas pressure who gets into gas detector.
Description
Technical Field
The utility model relates to a gaseous monitoring field, concretely relates to gaseous multichannel on-line monitoring system.
Background
In the industrial production field, the real-time effective monitoring of the environment of the chemical engineering field is needed, so that whether harmful gas leaks can be timely and accurately found, abnormal production conditions can be timely dealt with, and environmental pollution and human harm are reduced to the minimum.
However, in practical applications, the environment of an industrial site is complex, types of gases to be monitored may be various, and even a position to be monitored is not limited to one place, whereas in the prior art, most gas detectors detect a certain gas, and a detection position is single, and meanwhile, gas detectors of the same gas are also various, for example, when detecting vinyl chloride, detectors based on a laser principle, a light particle detector (PID) principle, or an electrochemical sensor detector may be selected.
When multiple gases at multiple positions need to be monitored, more gas detectors need to be arranged, which brings great difficulty to the arrangement of on-site equipment, and therefore, a monitoring system is needed, which can be suitable for monitoring multiple gases and detecting multiple positions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough to a gaseous multichannel online monitoring system is provided, concrete scheme is as follows:
a gas multi-path online monitoring system comprises a sampling unit, a conveying pipeline and a processing unit;
the sampling unit comprises N sampling branches which are arranged in parallel, the gas input end of each sampling branch is connected with the output end of the sampling unit through a primary filtering device and an electric control switch, and N is more than or equal to 2;
the conveying pipeline is provided with a secondary filtering device, an air pressure meter and an air pump, the input end of the conveying pipeline is connected with the output end of the sampling unit, and the first output end of the conveying pipeline is used for being connected with a gas detector; the second output end of the conveying pipeline is connected with the input end of a partial pressure branch, the output end of the partial pressure branch is used for discharging gas, and an electric control switch is also arranged on the partial pressure branch;
the processing unit is respectively connected with the electric control switch and the air pump.
Further, the electric control switch is an electromagnetic valve.
Further, the processing unit is connected with the electric control switch in a control mode of R485.
Further, the processing unit is in communication connection with the remote monitoring platform through a GPRS or an Ethernet.
Further, a first output end of the conveying pipeline is connected with a gas detector; the processing unit is connected with the gas detector.
Further, the processing unit is connected with the gas detector in an R232 mode.
The utility model discloses relative prior art has outstanding substantive characteristics and the progress that is showing, specifically speaking, the utility model has the following advantages:
the utility model discloses a set up many sampling branch roads to realize the gas sampling to a plurality of positions, can carry out all-round monitoring to the site environment, realize the control to the break-make of each sampling branch road through controlling the electric control switch on each sampling branch road simultaneously, open the electric control switch of corresponding branch road when needing to monitor to some positions, and close the electric control switch of remaining branch road, realize the accurate monitoring to gas;
the pressure dividing branch is arranged, and an electric control switch on the pressure dividing branch is controlled to be turned on when gas in a high-pressure environment is detected, so that a certain amount of gas is discharged, and the pressure of the gas entering the gas detector can be effectively adjusted; simultaneously the utility model discloses gas detection appearance in the system can be changed as required to the realization is to the gaseous detection of different grade type, before changing gas detection appearance, can avoid causing the influence for follow-up gas detection through the partial pressure branch road with remaining other gaseous discharges in the system.
Drawings
Fig. 1 is a schematic diagram of a system structure in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
System architecture
As shown in fig. 1, the system in this embodiment includes a sampling unit, a conveying pipeline, a processing unit and a monitoring platform, where the sampling unit includes 6 sampling branches connected in parallel, and each sampling branch is provided with a filtering device and an electronic control switch, as shown in fig. 1, the filters 1 to 6 are respectively filtering devices in the 6 sampling branches, and K1 to K6 are respectively electronic control switches in the 6 sampling branches, in this embodiment, the electronic control switches are electromagnetic valves, and the processing unit is controlled and connected to the electromagnetic valves in a communication manner of R485; in other embodiments, other types of electrically controlled switches may be used in place of the battery valve.
The output end of each sampling branch is connected with the input end of the conveying pipeline, a filtering device, such as a filter 7 in fig. 1, is arranged on the conveying pipeline, in the embodiment, the filters 1 to 6 adopt stainless steel filtering probes for primary filtering, and the filter 7 is a precise PPTF filtering material, so that small-particle dust can be filtered completely, the dust is prevented from entering an analytical instrument, and the detection precision and the service life of the analytical instrument are ensured. The conveying pipeline is also provided with an air pump and a gas pressure meter, the air pump is used for conveying the sampled gas to a gas detector, and the gas detector is used for analyzing the gas; the barometer is used for showing the gas pressure size in the conveying pipeline, and when the filter equipment probably takes place the condition of jam after working for a period of time for a long time, the barometer negative pressure condition appears at this moment, and the system will report to the police.
The output end of the conveying pipeline is connected with a gas detector, the gas detector is used for emptying gas after analyzing the sampled gas, the output end of the conveying pipeline is also connected with a pressure dividing branch, an electric control switch K7 is arranged in the pressure dividing branch, and the electric control switch K7 is an electromagnetic valve in the embodiment; the output end of the partial pressure branch is used for gas evacuation. Taking vinyl chloride as an example, the gas detector in this embodiment may select a corresponding type according to actual requirements, for example, a laser principle detector, a detector based on a light particle analysis (PID) principle, an infrared principle detector, or an electrochemical principle detector, and in other embodiments, a detector for detecting other types of gases may also be used.
The gas detector is connected with the processing unit in an R232 mode, the processing unit is connected with K1-K7 in an R485 mode, the processing unit is further connected with the air pump in a control mode, and meanwhile the processing unit is communicated with the monitoring platform through GPRS or Ethernet and transmits data.
Principle of operation
After the system normally operates, the air pump is always in an operating state. Firstly, the electromagnetic valve K1 is electrified, other electromagnetic valves are closed, the gas around the input end of the sampling branch where the electromagnetic valve K1 is located is collected for a certain time, the gas enters from the probe of the filter 1, is primarily filtered by the stainless steel filtering probe and then enters the rear multi-gas path joint through the electromagnetic valve K1; and then the gas enters the filter 7 from the multi-gas path joint, smaller particles and moisture in the gas are filtered and removed, the pressure is monitored by an air pump and a pressure gauge, and the gas enters the gas detector for detection and analysis and data results are obtained.
The detection result is uploaded to the processing unit through an R232 serial port line, the processing unit in this embodiment is a PC, the position of the currently operated solenoid valve and the corresponding detected concentration value are displayed in a software interface on the PC, and the data is stored in historical data, and meanwhile, the processing unit sends the detected data to a remote monitoring platform through a GPRS or ethernet mode for a remote operator to observe and use. Then, the electromagnetic valve K1 is powered off, the electromagnetic valve K2 is powered on, and the sampling branch where the electromagnetic valve K2 is located carries out sampling; and the other sampling branches are sequentially analyzed and detected according to the process.
Meanwhile, the barometer detects the gas pressure in the pipeline in real time, when the filter is possibly blocked after being used for a period of time, the air pump runs, the barometer can generate a negative pressure condition, and the processing unit sends out an alarm signal after obtaining the negative pressure data of the barometer to remind a worker to remove the fault.
When the gas environment needing to be detected is a high-pressure environment, in order to avoid overlarge pressure of gas entering the gas detector, when the pressure gauge detects that the pressure is larger, the electromagnetic valve K7 can be controlled to be opened, so that the gas in the pipeline is discharged through the partial pressure branch, and the pressure in the pipeline is reduced. When detecting different gases, not only need to change the type of gas detection appearance, still need guarantee not to remain other gases in the pipeline to cause the influence to follow-up detection, consequently can pass through the air pump and pass through the partial pressure branch road with the gas that last detection that exists left over in the system and discharge, thereby guarantee not to influence the detection to other gases.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (6)
1. A gaseous multichannel on-line monitoring system which characterized in that: comprises a sampling unit, a conveying pipeline and a processing unit;
the sampling unit comprises N sampling branches which are arranged in parallel, the gas input end of each sampling branch is connected with the output end of the sampling unit through a primary filtering device and an electric control switch, and N is more than or equal to 2;
the conveying pipeline is provided with a secondary filtering device, an air pressure meter and an air pump, the input end of the conveying pipeline is connected with the output end of the sampling unit, and the first output end of the conveying pipeline is used for being connected with a gas detector; the second output end of the conveying pipeline is connected with the input end of a partial pressure branch, the output end of the partial pressure branch is used for discharging gas, and an electric control switch is also arranged on the partial pressure branch;
the processing unit is respectively connected with the electric control switch and the air pump.
2. A gas multi-channel online monitoring system according to claim 1, characterized in that: the electric control switch is an electromagnetic valve.
3. A gas multi-channel online monitoring system according to claim 1 or 2, characterized in that: and the processing unit is controlled and connected with the electric control switch in an R485 mode.
4. A gas multi-way online monitoring system according to claim 3, characterized in that: the processing unit is in communication connection with the remote monitoring platform through GPRS or Ethernet.
5. The gas multi-channel online monitoring system of claim 4, wherein: the first output end of the conveying pipeline is connected with a gas detector; the processing unit is connected with the gas detector.
6. The gas multi-channel online monitoring system of claim 5, wherein: the processing unit is connected with the gas detector in an R232 mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921461821.XU CN210953961U (en) | 2019-09-04 | 2019-09-04 | Gas multi-path online monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921461821.XU CN210953961U (en) | 2019-09-04 | 2019-09-04 | Gas multi-path online monitoring system |
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| CN210953961U true CN210953961U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609120A (en) * | 2019-09-04 | 2019-12-24 | 汉威科技集团股份有限公司 | Gas multi-path online monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609120A (en) * | 2019-09-04 | 2019-12-24 | 汉威科技集团股份有限公司 | Gas multi-path online monitoring system |
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