CN109738424B - Air real-time detection method - Google Patents
Air real-time detection method Download PDFInfo
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- CN109738424B CN109738424B CN201811651583.9A CN201811651583A CN109738424B CN 109738424 B CN109738424 B CN 109738424B CN 201811651583 A CN201811651583 A CN 201811651583A CN 109738424 B CN109738424 B CN 109738424B
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Abstract
A real-time air detection method comprises the following steps: step one, preparing a variable-volume air inlet cavity; step two, evacuating substances in the air inlet cavity; injecting absorption liquid into the air inlet cavity; step four, enabling air to enter the air inlet cavity; step five, reducing the volume in the air inlet cavity and increasing the pressure intensity; and step six, after pressurization and pressure maintaining, taking out the absorption liquid in the air inlet cavity and detecting. According to the invention, on the basis of traditional absorption liquid measurement, the environmental pressure is increased, the absorption speed is greatly improved, the pressurization function is realized through a hydraulic system, the pressure is relatively accurate, an isolation cavity is arranged for preventing a hydraulic medium from being mixed with the absorption liquid, and the hydraulic medium with the specific gravity greater than that of water is used, so that even if the hydraulic medium breaks through the first layer and enters the isolation cavity, the hydraulic medium sinks at the bottom of the cavity due to the relatively high specific gravity and cannot pollute the absorption liquid, and the change state and the internal leakage problem of the absorption liquid can be observed at any time by adopting a body made of a transparent material.
Description
Technical Field
The invention relates to a gas detection device, in particular to a real-time air detection method.
Background
Nowadays, as the requirement for safety is gradually increased, air detection devices are widely used in large-scale offices or commercial places. The existing air detection means is to use spectral analysis and ion mobility spectrometry or absorption liquid absorption for detection, the equipment for spectral analysis and ion mobility spectrometry has high cost and is not suitable for large-scale application, and although the absorption liquid measurement has high cost advantage, the absorption speed cannot be guaranteed, so that the detection speed is slow, the precision is poor, and the air detection method is not suitable for real-time monitoring with a wide range.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the air detection device with high detection speed and high precision.
The technical scheme adopted by the invention is as follows: a real-time air detection method is characterized in that: the method comprises the following steps:
step one, preparing a variable-volume air inlet cavity;
step two, evacuating substances in the air inlet cavity;
injecting absorption liquid into the air inlet cavity;
step four, enabling air to enter the air inlet cavity;
step five, reducing the volume in the air inlet cavity and increasing the pressure intensity;
and step six, after pressurization and pressure maintaining, taking out the absorption liquid in the air inlet cavity and detecting.
The air real-time detection method is characterized by comprising the following steps: and in the fifth step, monitoring the pressure of the air inlet cavity while increasing the pressure, and stopping pressurizing and maintaining the pressure when reaching a specified value.
The air real-time detection method is characterized by comprising the following steps: the air inlet cavity is arranged in the body, the body is vertically arranged, a first piston and a second piston are sequentially arranged in the body from top to bottom, the two pistons divide the interior of the body into three cavities, the air inlet cavity, the isolation cavity and the pressurization cavity are respectively arranged from top to bottom, an air inlet and an air outlet are arranged at the top of the body and are communicated with the air inlet cavity, the two pistons are respectively matched with a first piston rod and a second piston rod, the first piston rod is sleeved in the second piston and the second piston rod, a first liquid inlet and a first liquid outlet are arranged on the top surface of the first piston, a second liquid inlet and a second liquid outlet are arranged on the top surface of the second piston, the liquid inlets and the liquid outlets are communicated with the outside through corresponding flow passages arranged in the pistons and the piston rods, a hydraulic port is arranged at the bottom of the body and is communicated with the pressurization cavity, the pneumatic pressure measuring device is characterized in that a pneumatic check valve is arranged at the air inlet, an electric gate valve is arranged at the air outlet, a pressure measuring port is arranged at the top of the body, the pressure measuring port is matched with a pressure transmitter, the hydraulic port is matched with a hydraulic system, the pressure transmitter controls the hydraulic system to be opened and closed, and the body is made of transparent materials.
In the second step, before detection, the hydraulic system supplies oil to the pressurizing cavity to push the first piston and the second piston to move upwards until the first piston is contacted with the inner top surface of the body, so that the air inlet cavity is emptied.
The air real-time detection method is characterized by comprising the following steps: in the fourth step, after the liquid filling is finished, the hydraulic system pumps oil into the pressurizing cavity, the first piston moves downwards, the volume of the air inlet cavity is increased, and outside air enters the air inlet cavity due to negative pressure.
The air real-time detection method is characterized by comprising the following steps: and step five, after air inlet is finished, the hydraulic system supplies oil to the pressurizing cavity again, the first piston moves upwards, the volume of the air inlet cavity is continuously reduced, the internal pressure is gradually increased, a pressure value is set according to the detection item and the relevant properties of the detected gas, and when the pressure reaches a set value, the pressure transmitter transmits a signal to stop the hydraulic system and enter a pressure maintaining state.
The air real-time detection method is characterized by comprising the following steps: and step six, electrifying the electromagnet of the reversing valve, opening the reversing valve, and allowing the absorption liquid to enter the detection container through the first liquid discharge port for detection.
The air real-time detection method is characterized by comprising the following steps: the body is made of transparent materials, a camera is matched with the body, and the camera is connected with a display; and 6, monitoring a real-time picture returned by the camera through the display, and judging a detection result according to whether the absorption liquid in the real-time picture changes color or not.
According to the invention, on the basis of traditional absorption liquid measurement, the environmental pressure is increased, the absorption speed is greatly improved, the pressurization function is realized through a hydraulic system, the pressure is relatively accurate, an isolation cavity is arranged for preventing a hydraulic medium from being mixed with the absorption liquid, and the hydraulic medium with the specific gravity greater than that of water is used, so that even if the hydraulic medium breaks through the first layer and enters the isolation cavity, the hydraulic medium sinks at the bottom of the cavity due to the relatively high specific gravity and cannot pollute the absorption liquid, and the change state and the internal leakage problem of the absorption liquid can be observed at any time by adopting a body made of a transparent material.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention in use state 2;
FIG. 3 is a schematic view of the present invention in use state 3;
FIG. 4 is a schematic view of the present invention in use state 4;
FIG. 5 is a schematic view of the present invention in use state 5;
FIG. 6 is a schematic view of the position of the camera head according to the present invention;
FIG. 7 is a schematic view of a connection structure of a camera and a display according to the present invention;
in the figure: 1-body, 11-air inlet, 12-air outlet, 13-hydraulic port, 14-pneumatic one-way valve, 15-electric gate valve, 16-pressure measuring port, 17-pressure transmitter, 2-first piston, 21-first liquid inlet, 22-first liquid outlet, 23-first piston rod, 24-hydraulic one-way valve, 25-reversing valve, 3-second piston, 31-second liquid inlet, 32-second liquid outlet, 33-second piston rod, 4-piston rod, 5-air inlet cavity, 6-isolation cavity and 7-pressurization cavity.
Detailed Description
A real-time air detection method is realized by means of a device shown in figure 1 and comprises a body 1, a first piston 2, a second piston 3 and a piston rod 4, wherein the body 1 is vertically arranged, the first piston 2 and the second piston 3 are arranged in the body 1, the first piston 2 is arranged above the second piston 3, an air inlet cavity 5 is formed between the top surface of the first piston 2 and the body 1, an isolation cavity 6 is formed between the first piston 2 and the second piston 3, a pressurization cavity 7 is formed between the bottom surface of the second piston 3 and the body 1, the first piston 2 is matched with the first piston rod 23, the second piston 3 is matched with the second piston rod 33, the first piston rod 23 is sleeved in the second piston and the second piston rod, the lower part of the second piston rod 33 penetrates out of the body 1, and the first piston 2, the first piston rod 23, the second piston 3 and the second piston rod 33 form a dry shape.
The top of the body 1 is provided with an air inlet 11, an air outlet 12 and a pressure measuring port 16, the three ports are communicated with an air inlet cavity 21, the air inlet 11 is provided with a pneumatic one-way valve 14, the air outlet 12 is provided with an electric gate valve 15, the pressure measuring port 16 is provided with a pressure transmitter 17, and the bottom of the body 1 is provided with a hydraulic port 13.
The top surface of the first piston 2 is provided with a first liquid inlet 21 and a first liquid outlet 22, the top surface of the second piston 3 is provided with a second liquid inlet 31 and a second liquid outlet 32, and the liquid inlets and the liquid outlets are communicated with the outside through corresponding flow channels arranged in the pistons and the piston rods, wherein the first liquid inlet 21 is connected with a hydraulic one-way valve 24, the first liquid outlet is connected with a reversing valve 25, and the reversing valve 25 is a two-position two-way electromagnetic reversing valve.
When the device is used, the hydraulic port 13 is connected with a hydraulic system, the first liquid discharge port 22 is connected with a detection container, and the isolation cavity 6 is filled with distilled water.
Before detection, the hydraulic system supplies oil to the pressurizing cavity 7 to push the first piston and the second piston to move upwards until the first piston is in contact with the inner top surface of the body, so that the air inlet cavity 5 is emptied, as shown in fig. 2. As shown in fig. 3, the air inlet cavity is filled with absorption liquid through the first water inlet. As shown in fig. 4, after the liquid filling is completed, the hydraulic system pumps oil into the pressurizing cavity 7, the first piston moves downwards, the volume of the air inlet cavity becomes large, and outside air enters the air inlet cavity due to negative pressure. As shown in fig. 5, after the air intake is finished, the hydraulic system supplies oil to the pressurizing cavity 7 again, the first piston moves upwards, the volume of the air intake cavity is continuously reduced, the internal pressure is gradually increased, a pressure value can be set in advance according to the detection item and the relevant properties of the detected gas, when the pressure reaches the set value, the pressure transmitter transmits a signal to stop the hydraulic system to enter a pressure maintaining state, the relevant gas in the detected air can be rapidly absorbed in the high pressure state, then the electromagnet of the reversing valve 25 is electrified, and the absorption liquid enters the detection container through the first liquid discharge port.
After the liquid drainage is finished, the electromagnet of the reversing valve 25 is powered off, the electric gate valve 15 is opened, the hydraulic system continues to fill liquid into the pressurizing cavity, the first piston is pushed to the top, gas and liquid in the gas inlet cavity are emptied, and the state is returned to the state shown in figure 2 for the next detection.
As shown in fig. 6, 7, body 1 can adopt transparent material, body 1 matches camera 8, display 9 is connected to camera 8, camera 8 admits air intracavity absorption liquid real-time image transmission to display 9 with body 1 and shows, when carrying out on a large scale monitoring, set up a plurality of bodies in different positions, the camera that every body matches with it real-time picture conveying to the display, same platform display can monitor a plurality of cameras, if there is the absorption liquid more obvious reaction, can directly report to the police, need not to wait for the testing result.
Claims (5)
1. A real-time air detection method is characterized in that: an air real-time detection device is adopted and comprises a body, wherein the body is vertically arranged, a first piston and a second piston are sequentially arranged in the body from top to bottom, the interior of the body is divided into three cavities by the two pistons, the three cavities are respectively an air inlet cavity, an isolation cavity and a pressurization cavity from top to bottom, the body is provided with an air inlet, an air outlet and a pressure measuring port corresponding to the air inlet cavity, the first piston and the second piston are respectively matched with a first piston rod and a second piston rod, the first piston rod is sleeved in the second piston and the second piston rod, the top surface of the first piston is provided with a first liquid inlet and a first liquid outlet, the top surface of the second piston is provided with a second liquid inlet and a second liquid outlet, the liquid inlets and the liquid outlets are communicated with the outside through corresponding flow channels arranged in the pistons and the piston rods, the bottom of the body is provided with a hydraulic port, and the hydraulic port is communicated with the pressurization cavity, the pneumatic check valve is arranged at the air inlet, the electric gate valve is arranged at the air outlet, the pressure measuring port is arranged at the top of the body and matched with the pressure transmitter, the hydraulic port is matched with the hydraulic system, the pressure transmitter controls the hydraulic system to be opened and closed, and the body is made of transparent materials;
the method comprises the following steps:
the method comprises the following steps that firstly, an air inlet and an air outlet are communicated with the outside, a pressure measuring port is connected with a pressure transmitter, a first liquid inlet is connected with absorption liquid, and a first liquid discharging port is communicated with a detection container;
supplying oil to the pressurizing cavity, pushing the first piston and the second piston to move upwards until the first piston is contacted with the inner top surface of the body, and emptying the air inlet cavity;
injecting absorption liquid into the air inlet cavity from the first liquid inlet;
pumping oil from the pressurizing cavity, and pulling the first piston to enable air to enter the air inlet cavity;
supplying oil to the pressurizing cavity, pushing the first piston to reduce the volume in the air inlet cavity and increase the pressure, monitoring the pressure by the pressure transmitter, and stopping pressurizing and maintaining the pressure when the pressure reaches a specified value;
and step six, after pressurization and pressure maintaining, taking out the absorption liquid in the air inlet cavity through the first liquid discharge port and detecting.
2. The real-time air detection method according to claim 1, wherein: the air inlet is provided with a one-way valve which is communicated in one way from the outside of the air inlet cavity to the inside of the air inlet cavity;
in the fourth step, after the liquid filling is finished, the hydraulic system pumps oil into the pressurizing cavity, the first piston moves downwards, the volume of the air inlet cavity is increased, and outside air enters the air inlet cavity from the air inlet due to negative pressure.
3. The real-time air detection method as claimed in claim 2, wherein: and step five, after air inlet is finished, the hydraulic system supplies oil to the pressurizing cavity again, the first piston moves upwards, the volume of the air inlet cavity is continuously reduced, the internal pressure is gradually increased, a pressure value is set according to the detection item and the relevant properties of the detected gas, and when the pressure reaches a set value, the pressure transmitter transmits a signal to stop the hydraulic system and enter a pressure maintaining state.
4. The real-time air detection method according to claim 3, wherein: the first liquid discharge port is connected with an electromagnetic directional valve;
and step six, electrifying the electromagnet of the reversing valve, opening the reversing valve, and allowing the absorption liquid to enter the detection container through the first liquid discharge port for detection.
5. The real-time air detection method according to claim 4, wherein: the body is made of transparent materials, a camera is matched with the body, and the camera is connected with a display; and step six, monitoring a real-time picture returned by the camera through the display, and judging a detection result according to whether the absorption liquid in the real-time picture changes color or not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811651583.9A CN109738424B (en) | 2018-12-31 | 2018-12-31 | Air real-time detection method |
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| CN201811651583.9A CN109738424B (en) | 2018-12-31 | 2018-12-31 | Air real-time detection method |
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| CN109738424A CN109738424A (en) | 2019-05-10 |
| CN109738424B true CN109738424B (en) | 2022-02-01 |
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| CN102330716A (en) * | 2011-10-13 | 2012-01-25 | 苏州工业园区华焊科技有限公司 | Four-air-chamber cylinder provided with two linear strokes |
| CN104007081A (en) * | 2014-05-29 | 2014-08-27 | 江苏物联网研究发展中心 | Gas detection device, gas detection system and gas detection method |
| CN105443459A (en) * | 2015-12-27 | 2016-03-30 | 天津尚吉液压设备有限公司 | Automatic adjusting gas-liquid pressure cylinder |
| CN205620186U (en) * | 2015-11-24 | 2016-10-05 | 胡勇 | Gas collection device |
| CN106066322A (en) * | 2016-05-25 | 2016-11-02 | 昆明冶研新材料股份有限公司 | Measure the method for Phosphine content in gas to be measured |
| CN107345889A (en) * | 2016-05-05 | 2017-11-14 | 赵东洋 | A kind of experimental provision for determining gas solubility |
| CN207074174U (en) * | 2017-07-28 | 2018-03-06 | 江苏恩测检测技术有限公司 | A kind of air quality detector |
| CN208194144U (en) * | 2018-04-17 | 2018-12-07 | 沧州鸿天朗洁环保科技有限公司 | A kind of dynamic booster-type gas-liquid ratio mixed dissolution device |
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2018
- 2018-12-31 CN CN201811651583.9A patent/CN109738424B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330716A (en) * | 2011-10-13 | 2012-01-25 | 苏州工业园区华焊科技有限公司 | Four-air-chamber cylinder provided with two linear strokes |
| CN104007081A (en) * | 2014-05-29 | 2014-08-27 | 江苏物联网研究发展中心 | Gas detection device, gas detection system and gas detection method |
| CN205620186U (en) * | 2015-11-24 | 2016-10-05 | 胡勇 | Gas collection device |
| CN105443459A (en) * | 2015-12-27 | 2016-03-30 | 天津尚吉液压设备有限公司 | Automatic adjusting gas-liquid pressure cylinder |
| CN107345889A (en) * | 2016-05-05 | 2017-11-14 | 赵东洋 | A kind of experimental provision for determining gas solubility |
| CN106066322A (en) * | 2016-05-25 | 2016-11-02 | 昆明冶研新材料股份有限公司 | Measure the method for Phosphine content in gas to be measured |
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