CN111707621A

CN111707621A - Waste gas concentration detection machine gas washing device for tunnel construction

Info

Publication number: CN111707621A
Application number: CN202010590132.XA
Authority: CN
Inventors: 吴文旭
Original assignee: Individual
Current assignee: Taizhou Luqiao Mingtai Sheet Metal Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-09-25
Anticipated expiration: 2040-06-24
Also published as: CN111707621B

Abstract

The invention discloses a gas washing device of a waste gas concentration detector for tunnel construction, which comprises a machine body and an air inlet pipe, wherein a detection chamber, an air chamber, a heat exchange chamber and a pressure stabilizing chamber are respectively arranged in the machine body, the heat exchange chamber is hermetically connected with the air inlet pipe, one side of the detection chamber, which is far away from the air inlet pipe, is connected with a connecting rod in a penetrating manner, the part of the connecting rod outside the machine body is fixedly connected with a pull button, one end of the connecting rod in the detection chamber is fixedly connected with a sealing slide block, the air chamber is communicated with the outside in a penetrating manner and is provided with an air inlet channel, and the connecting parts. Has the advantages that: the invention processes the temperature, humidity and carbon dioxide concentration in the air sucked into the organism, so as to accord with various data of the components of the air chamber of the control group in the detector, thereby improving the detection result and the precision.

Description

Waste gas concentration detection machine gas washing device for tunnel construction

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a gas washing device of a waste gas concentration detection machine for tunnel construction.

Background

In recent years, with the rapid development of tunnel engineering, the tunnel disaster problem (such as tunnel shale gas) is increasingly highlighted, casualties and major property loss are easily caused, and the research on the monitoring and monitoring technology of coal mine gas has the advantages that a plurality of gas extraction technologies are developed and successively go through 4 stages of taking local outburst prevention measures as the main, taking the gas after extraction and reaching the extraction standard and taking regional outburst prevention measures in advance;

the problems of uncertainty, inaccuracy and the like exist in the gas monitoring process, so that the detection system controlled by the commonly adopted sensor can be omitted, besides machine detection, the manual detection mode is adopted, so that the worker can move anywhere, missing points detected by the machine can be detected, the detection is more flexible and convenient, when the manual gas monitoring enters a gas working area, a toxic and harmful gas detector needs to be carried, so that the safety of production and construction is ensured, and when the manual gas monitoring is actually used, since the prior art exhaust gas concentration detecting machine needs to suck the outside air into the detecting chamber and perform comparison through an optical instrument when in use, but is easily affected by the outside humidity, temperature and other elements of the air when in actual use, therefore, the invention designs the gas washing device of the waste gas concentration detector for tunnel construction.

Disclosure of Invention

The invention aims to solve the problems that an exhaust gas detection device in the prior art is insufficient in precision and is easily influenced by humidity, concentration of other components in air and temperature, and provides a washing device of an exhaust gas concentration detection machine for tunnel construction.

In order to achieve the purpose, the invention adopts the following technical scheme: a gas washing device of a waste gas concentration detector for tunnel construction comprises a machine body and an air inlet pipe, wherein a detection chamber, an air chamber, a heat exchange chamber and a pressure stabilizing chamber are respectively arranged in the machine body, the heat exchange chamber is connected with the air inlet pipe in a sealing manner, one side, far away from the air inlet pipe, of the detection chamber is connected with a connecting rod in a penetrating manner, the part outside the machine body of the connecting rod is fixedly connected with a pull button, one end, in the detection chamber, of the connecting rod is fixedly connected with a sealing slide block, the air chamber is communicated with the outside in a penetrating manner and is provided with an air inlet channel, and the;

the heat exchange chamber is communicated with the detection chamber and is provided with a first connecting port, the connecting positions of the first connecting port, the heat exchange chamber and the air inlet pipe are hermetically connected with a breathable film, the detection chamber is communicated with the pressure stabilizing chamber and is provided with a second connecting port, and the pressure stabilizing chamber and the air chamber are communicated with each other and are provided with a third connecting port;

the heat exchange chamber is filled with magnetizable ionic liquid, the bottom of the sealing sliding block is fixedly connected with a permanent magnet, one side of the detection chamber, which is close to the pull button, is fixedly connected with a conducting layer, the conducting layer is electrically connected with an electromagnetic valve, and the electromagnetic valve is connected with a first connecting port in a sealing mode.

In the gas washing device of the waste gas concentration detector for tunnel construction, the pressure stabilizing chamber is internally and hermetically connected with a blocking block, the bottom of the blocking block is fixedly connected with a spring, a pressure stabilizing channel is arranged in the blocking block, the pressure stabilizing channel is internally and hermetically connected with a pressure stabilizing film, two piezoelectric ceramic plates are respectively arranged on two sides of the blocking block and are electrically connected with the pressure stabilizing film.

Compared with the prior art, the invention has the advantages that:

1. according to the invention, the air entering the vent pipe is subjected to air washing through the characteristics that the ionic liquid cannot be volatilized and is dissolved in water and carbon dioxide, so that the carbon dioxide component and the water component in the gas exhausted from the other side are reduced, and the contrast error of the air chamber on the light interference principle is reduced;

2. the waste gas concentration detector of the invention adopts an optical interference type detector, and the light path of parallel light emitted by a light source is changed when the parallel light irradiates air and waste gas, so that interference fringes can move. When the two chambers are equal in temperature and pressure, the amount of interference fringe movement is proportional to the methane concentration. The content of the waste gas in the air can be measured by measuring the movement amount, and the detection result is inaccurate because the difference between the external temperature, the humidity and the carbon dioxide concentration is larger than that in the air chamber of the detection machine during the actual tunnel construction, and the detection precision is improved by washing the air entering the detection chamber;

3. in practical use, the ionic liquid has the advantages of non-volatility and good heat exchange efficiency as the heat medium, and the mixed ionic liquid can be set to have BF4 absorbing moisture as anionic ionic liquid, imidazole type ionic liquid absorbing carbon dioxide and magnetizable FeCl₃The ionic liquid is composed, so that the carbon dioxide and the moisture absorbed in the air in the heat exchange chamber can be absorbed at the same time, the influence of the components on the detection result due to the concentration problem is reduced, and the magnetizable ionic liquid can be magnetized by the permanent magnet at the bottom of the sealing slide block, so that the sealing is realized at the pull buttonWhen the sliding block is pulled to the tail end, the ionic liquid recovers to absorb heat on two sides, so that the temperature difference between the two sides is reduced, and the influence of the temperature on detection is reduced;

4. when the pull button pulls the sealing slide block to the tail end, the conducting layer is connected with the sealing slide block, so that an external battery supplies power to the electromagnetic valve, the electromagnetic valve is converted into a sealing state from an uncharged conduction state, the air pressure in the detection chamber is fixed at the moment, the air below the resistance block in the pressure stabilizing chamber is adjusted by the second connecting port and the pressure stabilizing chamber to meet the condition that the air pressure in the detection chamber and the air chamber is the same, and the influence of the air pressure on the detection result is reduced.

5. After the detection, promote the knob to the other end, but this moment the permanent magnet carries out the magnetization to the ionic liquid that magnetizes again, and under the effect of magnetocaloric effect, the ionic liquid is released from the opposite side by the carbon dioxide that self was absorbed after the heating, then can carry out reuse next time, and is sealed by sealed slider in the detection room this moment, can not cause the influence to the gas composition in the detection room when next time bleeding to the external world.

Drawings

FIG. 1 is a schematic structural diagram of a gas washing device of an exhaust gas concentration detector for tunnel construction according to the present invention;

fig. 2 is an enlarged schematic view of a part a of the gas washing device of the exhaust gas concentration detection machine for tunnel construction according to the present invention.

In the figure: 1 machine body, 2 air inlet pipes, 31 detection chambers, 32 air chambers, 33 heat exchange chambers, 34 pressure stabilizing chambers, 4 conducting layers, 5 connecting rods, 6 connecting rods, 7 sealing sliding blocks, 8 sealing plugs, 9 breathable films, 10 electromagnetic valves, 11 air inlet channels, 12 permanent magnets, 13 blocking blocks, 14 springs, 15 pressure stabilizing channels, 16 pressure stabilizing films and 17 piezoelectric ceramic plates.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-2, a tunnel construction waste gas concentration detection machine gas washing device comprises a machine body 1 and an air inlet pipe 2, wherein a detection chamber 31, an air chamber 32, a heat exchange chamber 33 and a pressure stabilizing chamber 34 are respectively arranged in the machine body 1, the heat exchange chamber 33 is hermetically connected with the air inlet pipe 2, one side of the detection chamber 31, which is far away from the air inlet pipe 2, is connected with a connecting rod 5 in a penetrating manner, the part of the connecting rod 5, which is outside the machine body 1, is fixedly connected with a pull button 6, one end of the connecting rod 5, which is inside the detection chamber 31, is fixedly connected with a sealing slide block 7, the air chamber 32 is communicated with the outside in a penetrating manner and is provided;

the heat exchange chamber 33 is communicated with the detection chamber 31 and is provided with a first connecting port, the first connecting port and the connecting part of the heat exchange chamber 33 and the air inlet pipe 2 are hermetically connected with a breathable film 9, the breathable film 9 can only be breathable and cannot permeate liquid, therefore, when the sealing slide block 7 moves, external gas enters the detection chamber 31 through the heat exchange chamber 33 under the action of air pressure, the detection chamber 31 is communicated with a pressure stabilizing chamber 34 and is provided with a second connecting port, the pressure stabilizing chamber 34 is communicated with the detection chamber 31 through the second connecting port, the pressure stabilizing chamber 34 is communicated with the air chamber and is provided with a third connecting port, so that the pressure stabilizing chamber 34 is communicated with air 32, the heat exchange chamber 33 is filled with magnetizable ionic liquid, the ionic liquid is formed by mixing a plurality of ionic liquids capable of absorbing carbon dioxide, water and magnetizing, the permanent magnet 12 is fixedly connected to the bottom of the sealing slide block 7, part of the ionic liquid can be magnetized, the electrically conductive layer 4 is electrically connected to a solenoid valve 10, so that in the non-energized state the solenoid valve 10 remains conductive, and in the energized state the solenoid valve 10 is connected in a sealing manner at the first connection.

The pressure stabilizing chamber 34 is internally and hermetically connected with a blocking block 13, the bottom of the blocking block 13 is fixedly connected with a spring 14, a pressure stabilizing channel 15 is arranged in the blocking block 13, a pressure stabilizing film 16 is hermetically connected in the pressure stabilizing channel 15, two sides of the blocking block 13 are respectively provided with a piezoelectric ceramic plate 17, the two piezoelectric ceramic plates 17 are electrically connected with the pressure stabilizing film 16, when the pressure difference between the two sides is different, the piezoelectric ceramic plates 17 are subjected to pressure to generate current, so that the pressure stabilizing film 16 is in an open state, at the moment, the air flows on the two sides of the pressure stabilizing chamber 34 are exchanged, so that the air chamber 32 and the detection chamber 31 are maintained under the same air condition, the air volumes on the two sides are adjusted to be approximately the same, the influence of the air pressure on the detection result is reduced, the side wall of the pressure stabilizing chamber 34 is provided with a pressure release valve.

Because of the abundant underground water in the tunnel and the long processing distance during construction, the content of moisture and carbon dioxide in the air in the tunnel is higher than that in the outside, and the contrast of the detector with the normal air content detection is influenced, and when the invention is used, the pull button 6 is pulled from one end close to the air inlet pipe 2 to the other end, since the heat exchange chamber 33 is filled with liquid and both ends are sealed by the gas permeable membrane 9, during pulling, the outside air enters the heat exchange chamber 33 through the air permeable membrane 9, at the moment, the air permeable membranes 9 at the two sides are expanded outwards, and is provided with a large restoring elastic force, so that the gas sucked into the heat exchange chamber 33 is output to the detection chamber 31 under the negative pressure, in the process, moisture and carbon dioxide in the outside air are absorbed under the mixing action of the ionic liquids, so that the gas entering the detection chamber 31 is scrubbed to eliminate the interference of other gas components;

meanwhile, when the magnetized ends of the permanent magnet and the ionic liquid enter and are insulated from the heat exchange chamber 33, the magnetized ionic liquid is recovered, and heat is absorbed to the outside according to the magnetocaloric effect, so that the temperatures in the air chambers 32 and the detection chamber 31 on the two sides are reduced at the same time, and the temperatures are kept approximately consistent through the heat exchange effect of the liquid, thereby eliminating the influence of the temperature on the detection result.

Although the terms 1 body, air inlet pipe 2, detection chamber 31, air chamber 32, heat exchange chamber 33, pressure stabilizing chamber 34, conductive layer 4, connecting rod 5, pull button 6, sealing slide 7, sealing plug 8, breathable membrane 9, electromagnetic valve 10, air inlet channel 11, permanent magnet 12, block 13, spring 14, pressure stabilizing channel 15, pressure stabilizing membrane 16, piezoelectric ceramic plate 17, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A gas washing device of a waste gas concentration detection machine for tunnel construction, which comprises a machine body (1) and a gas inlet pipe (2), it is characterized in that a detection chamber (31), an air chamber (32), a heat exchange chamber (33) and a pressure stabilizing chamber (34) are respectively arranged in the machine body (1), the heat exchange chamber (33) is hermetically connected with the air inlet pipe (2), one side of the detection chamber (31) far away from the air inlet pipe (2) is connected with a connecting rod (5) in a penetrating way, the part of the connecting rod (5) outside the machine body (1) is fixedly connected with a pull button (6), one end of the connecting rod (5) in the detection chamber (31) is fixedly connected with a sealing slide block (7), the air chamber (32) is communicated with the outside and is provided with an air inlet channel (11), the connection parts of the air inlet channel (11) and the air inlet pipe (2) with the outside are respectively connected with a sealing plug (8) in a sealing way;

the heat exchange chamber (33) is communicated with the detection chamber (31) to form a first connecting port, the connecting positions of the first connecting port, the heat exchange chamber (33) and the air inlet pipe (2) are hermetically connected with a breathable film (9), the detection chamber (31) is communicated with the pressure stabilizing chamber (34) to form a second connecting port, and the pressure stabilizing chamber (34) is communicated with the air chamber to form a third connecting port;

the heat exchange chamber (33) is filled with magnetizable ionic liquid, the bottom of the sealing sliding block (7) is fixedly connected with a permanent magnet (12), one side, close to the pull button (6), of the detection chamber (31) is fixedly connected with a conducting layer (4), the conducting layer (4) is electrically connected with an electromagnetic valve (10), and the electromagnetic valve (10) is connected at a first connecting port in a sealing mode.

2. The device for washing the gas of the exhaust gas concentration detector for tunnel construction according to claim 1, wherein a block (13) is hermetically connected in the surge chamber (34), a spring (14) is fixedly connected to the bottom of the block (13), a pressure stabilizing channel (15) is formed in the block (13), a pressure stabilizing film (16) is hermetically connected in the pressure stabilizing channel (15), two piezoelectric ceramic plates (17) are respectively arranged on two sides of the block (13), and both piezoelectric ceramic plates (17) are electrically connected with the pressure stabilizing film (16).