CN111707621B - Waste gas concentration detects quick-witted gas washing device for tunnel construction - Google Patents
Waste gas concentration detects quick-witted gas washing device for tunnel construction Download PDFInfo
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- CN111707621B CN111707621B CN202010590132.XA CN202010590132A CN111707621B CN 111707621 B CN111707621 B CN 111707621B CN 202010590132 A CN202010590132 A CN 202010590132A CN 111707621 B CN111707621 B CN 111707621B
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
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Abstract
The invention discloses an exhaust gas concentration detector gas washing device 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 in sealed connection 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 way, the part of the connecting rod, which is outside the machine body, is fixedly connected with a pull button, one end of the connecting rod, which is inside the detection chamber, is fixedly connected with a sealing slide block, the air chamber is communicated with the outside in a penetrating way, and the joint of the air inlet channel and the air inlet pipe, which is outside, is respectively in sealed connection with a sealing plug. The advantages are that: according to the invention, the temperature, the humidity and the carbon dioxide concentration in the gas sucked into the machine body are processed, so that the temperature, the humidity and the carbon dioxide concentration are consistent with various data of the air chamber component of the control group in the detector, and the detection result and the detection precision are improved.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to an exhaust gas concentration detector gas washing device for tunnel construction.
Background
In recent years, with the rapid development of tunnel engineering, the problems of tunnel disasters (such as tunnel shale gas) are increasingly prominent, casualties and important property loss are easily caused, and a plurality of gas extraction technologies are developed for the research of monitoring and monitoring technology of coal mine gas, and are subjected to 4 stages of 'local outburst prevention measures are mainly, extraction is carried out firstly and then, extraction reaches the standard and regional outburst prevention measures firstly';
the problems of uncertainty, inaccuracy and the like exist in the gas monitoring process, so that a detection system controlled by a sensor commonly adopted possibly has omission, a manual detection mode is adopted except for machine detection, workers can move everywhere, missing points of machine detection can be detected, the detection system is flexible and convenient, a toxic and harmful gas detector is required to be carried when manual gas monitoring enters a gas working area, the safety of production construction is ensured, and during actual use, because the waste gas concentration detector in the prior art is used for sucking outside air into a detection chamber and comparing the outside air with the optical instrument, the detection system is easily influenced by outside humidity, temperature and other component elements of the air during actual use, so that the detection structure is influenced.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the exhaust gas detection device is not accurate enough in use and is easily influenced by humidity, concentration of other components in air and temperature, and provides an exhaust gas concentration detection machine gas washing device for tunnel construction.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a waste gas concentration detects quick-witted gas washing device for tunnel construction, includes organism and intake pipe, detection room, air chamber, heat exchange chamber and steady voltage room have been seted up respectively in the organism, heat exchange chamber and intake pipe sealing connection, the one side that the detection room kept away from the intake pipe runs through and is connected with the connecting rod, the connecting rod is at the outside part fixedly connected with pull button of organism, the one end fixedly connected with sealed slider of connecting rod in the detection room, the air chamber runs through the intercommunication with the external world and is equipped with the air inlet channel, the junction of air inlet channel and intake pipe and external world do not sealing connection has the sealing plug respectively;
the heat exchange chamber is communicated with the detection chamber, a first connecting port is formed in the first connecting port, the connection part of the heat exchange chamber and the air inlet pipe is hermetically connected with a ventilated membrane, the detection chamber is communicated with the pressure stabilizing chamber, and a third connecting port is formed in the pressure stabilizing chamber and the air chamber;
the heat exchange chamber is filled with magnetizable ionic liquid, a permanent magnet is fixedly connected to the bottom of the sealing slide block, a conductive layer is fixedly connected to one side, close to the pull button, of the detection chamber, an electromagnetic valve is electrically connected to the conductive layer, and the electromagnetic valve is connected to the first connecting port in a sealing mode.
In the waste gas concentration detector gas washing device for tunnel construction, the block is connected in a sealing manner in the pressure stabilizing chamber, the spring is fixedly connected to the bottom of the block, the pressure stabilizing channel is arranged in the block, the pressure stabilizing membrane is connected in a sealing manner in the pressure stabilizing channel, and two piezoelectric ceramic plates are respectively arranged on two sides of the block and are electrically connected with the pressure stabilizing membrane.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the air entering the vent pipe is scrubbed through the characteristics that the ionic liquid cannot volatilize and is dissolved in water and carbon dioxide, so that the carbon dioxide component and the water component in the air discharged from the other side are reduced, and the comparison error of the optical interference principle of the air chamber is reduced;
2. in the invention, the waste gas concentration detector adopts an optical interference type detector, and when the parallel light emitted by the light source irradiates air and waste gas, the optical path is changed along with the change of refractive index, so that interference fringes can move. When the temperature and pressure of the two chambers are equal, the movement amount of the interference fringes is proportional to the methane concentration. The moving amount is measured, so that the waste gas content in the air can be measured, and the detection result is inaccurate because the outside temperature, the outside humidity and the carbon dioxide concentration are greatly different from those in the air chamber in the detector during 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, better heat exchange efficiency as a heating medium, and the mixed ionic liquid can be provided as BF4 for absorbing water as an anionic ionic liquid, an imidazole type ionic liquid for absorbing carbon dioxide and a magnetizable FeCl 3 The ionic liquid is composed, so that carbon dioxide and water absorbed into the air in the heat exchange chamber can be absorbed simultaneously, the detection result is influenced by concentration problems of the carbon dioxide and the water can be reduced, and the magnetizable ionic liquid can be magnetized by the permanent magnet at the bottom of the sealing sliding block, so that the ionic liquid is restored to absorb heat on two sides when the sealing sliding block is pulled to the tail end by the pull button, the temperature difference between the two is reduced simultaneously, and the influence of the temperature on detection is reduced;
4. when the pull button pulls the sealing slide block to the extreme end, the conducting layer is connected with the sealing slide block, so that the 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, and the air below the block in the regulation pressure stabilizing chamber of the second connecting port and the pressure stabilizing chamber is identical in air pressure in the detection chamber and the air chamber, so that the influence of the air pressure on the detection result is reduced.
5. After the detection is finished, the pull button is pushed to the other end, at the moment, the permanent magnet magnetizes the magnetizable ionic liquid again, under the action of the magnetocaloric effect, carbon dioxide absorbed by the ionic liquid after being heated is discharged from the other side, the ionic liquid can be reused next time, and the detection chamber is sealed by the sealing sliding block, so that the gas component in the detection chamber cannot be influenced when the air is pumped to the outside next time.
Drawings
FIG. 1 is a schematic diagram of a gas washing device of an exhaust gas concentration detector for tunnel construction;
fig. 2 is an enlarged schematic diagram of a portion a of a gas washing device of an exhaust gas concentration detector for tunnel construction according to the present invention.
In the figure: 1 organism, 2 intake pipe, 31 detection room, 32 air chamber, 33 heat transfer room, 34 surge tank, 4 conducting layer, 5 connecting rod, 6 connecting rod, 7 sealed slider, 8 sealing plug, 9 ventilated membrane, 10 solenoid valve, 11 air inlet channel, 12 permanent magnet, 13 blocking piece, 14 spring, 15 surge tank, 16 surge tank, 17 piezoceramics board.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1-2, an exhaust gas concentration detector gas washing device for tunnel construction 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 in sealing connection with the air inlet pipe 2, a connecting rod 5 is connected with one side of the detection chamber 31 far away from the air inlet pipe 2 in a penetrating way, a pull button 6 is fixedly connected with the part of the connecting rod 5 outside the machine body 1, a sealing slide block 7 is fixedly connected with one end of the connecting rod 5 in the detection chamber 31, an air inlet channel 11 is connected with the air chamber 32 in a penetrating way with the outside, and sealing plugs 8 are respectively connected with the connecting parts of the air inlet channel 11 and the air inlet pipe 2 with the outside in a sealing way;
the heat exchange chamber 33 is communicated with the detection chamber 31, a first connecting port is formed in the joint of the first connecting port and the heat exchange chamber 33 as well as the air inlet pipe 2, the air permeable membrane 9 is only air permeable and can not penetrate through liquid, therefore, when the sealing slide block 7 moves, external air enters the detection chamber 31 through the heat exchange chamber 33 under the action of air pressure, the detection chamber 31 is communicated with the pressure stabilizing chamber 34 and is provided with a second connecting port, the pressure stabilizing chamber 34 is communicated with the detection chamber 31, the pressure stabilizing chamber 34 is communicated with the air chamber and is provided with a third connecting port, the pressure stabilizing chamber 34 is communicated with the air 32, the heat exchange chamber 33 is filled with magnetizable ionic liquid, the ionic liquid is formed by mixing a plurality of magnetizable ionic liquids capable of absorbing carbon dioxide, water, and the sealing slide block 7 is fixedly connected with the permanent magnet 12, the permanent magnet 12 can magnetize part of the ionic liquid, one side of the detection chamber 31, which is close to the pull button 6, is fixedly connected with the conductive layer 4, the conductive layer 4 is electrically connected with the electromagnetic valve 10, so that the electromagnetic valve 10 is kept conductive in a non-energized state, and the electromagnetic valve 10 is hermetically connected to the first connecting port in an energized state.
The pressure stabilizing chamber 34 is internally and hermetically connected with the blocking block 13, the spring 14 is fixedly connected to the bottom of the blocking block 13, the pressure stabilizing channel 15 is arranged in the blocking block 13, the pressure stabilizing membrane 16 is hermetically connected in the pressure stabilizing channel 15, two piezoelectric ceramic plates 17 are respectively arranged on two sides of the blocking block 13 and are electrically connected with the pressure stabilizing membrane 16, when the pressure difference of the two sides is different, the piezoelectric ceramic plates 17 are subjected to pressure to generate current, the pressure stabilizing membrane 16 is in an open state, the airflows on the two sides of the pressure stabilizing chamber 34 are exchanged, the air chamber 32 and the detection chamber 31 are kept under the same gas condition, the volumes of the gases 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 relief valve, and when the air pressure of the output pressure stabilizing chamber 34 is larger, the redundant gas is discharged through the pressure relief valve.
Because of the abundant groundwater in the tunnel and the longer processing distance during construction, the moisture and carbon dioxide content in the air in the tunnel is higher than the outside, which affects the comparison between the detector and the normal air content detection, while in the invention, when in use, the pull button 6 is pulled from one end close to the air inlet pipe 2 to the other end, because the heat exchange chamber 33 is filled with liquid, and the two ends are sealed by the ventilation film 9, in the pulling process, the outside air enters the heat exchange chamber 33 through the ventilation film 9, at the moment, the ventilation films 9 on the two sides expand outwards, and have larger restoring elasticity, therefore, under the negative pressure, the gas sucked into the heat exchange chamber 33 is output into the detection chamber 31, and the moisture and carbon dioxide in the outside air are absorbed under the mixing action of various ionic liquids in the process, so that the gas entering the detection chamber 31 is scrubbed to exclude the interference of other gas components;
at the same time, when the permanent magnet and one end magnetized by the ionic liquid enter the heat exchange chamber 33 to be insulated, the magnetized ionic liquid is restored, and absorbs heat to the outside according to the magnetocaloric effect, so that the temperatures of the air chambers 32 at two sides and the detection chamber 31 are reduced, and the temperatures of the air chambers and the detection chamber are kept approximately consistent through the heat exchange effect of the liquid, thereby eliminating the influence of the temperature on the detection result.
Although terms such as 1 body, intake pipe 2, detection chamber 31, air chamber 32, heat exchange chamber 33, surge chamber 34, conductive layer 4, connecting rod 5, pull button 6, seal slider 7, sealing plug 8, ventilation film 9, solenoid valve 10, intake passage 11, permanent magnet 12, block 13, spring 14, surge passage 15, surge film 16, piezoelectric ceramic plate 17, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (2)
1. The utility model provides a waste gas concentration detects quick-witted gas washing device for tunnel construction, includes organism (1) and intake pipe (2), its characterized in that, detection room (31), air chamber (32), heat transfer room (33) and surge tank (34) have been seted up in organism (1) respectively, heat transfer room (33) and intake pipe (2) sealing connection, one side that intake pipe (2) was kept away from to detection room (31) is connected with connecting rod (5) throughout, connecting rod (5) are outside part fixedly connected with pull button (6) of organism (1), one end fixedly connected with sealing slider (7) of connecting rod (5) in detection room (31), air chamber (32) are equipped with inlet channel (11) with external through-connection, inlet channel (11) and intake pipe (2) are sealing connection sealing plug (8) respectively with external junction;
the heat exchange chamber (33) is communicated with the detection chamber (31) to form a first connection port, the connection parts of the first connection port and the heat exchange chamber (33) as well as the air inlet pipe (2) are respectively and hermetically connected with the ventilation membrane (9), the detection chamber (31) is communicated with the pressure stabilizing chamber (34) to form a second connection port, and the pressure stabilizing chamber (34) is communicated with the air chamber to form a third connection port;
the heat exchange chamber (33) is filled with magnetizable ionic liquid, a permanent magnet (12) is fixedly connected to the bottom of the sealing sliding block (7), a conductive layer (4) is fixedly connected to one side, close to the pull button (6), of the detection chamber (31), the conductive layer (4) is electrically connected with an electromagnetic valve (10), and the electromagnetic valve (10) is connected to a first connecting port in a sealing mode.
2. The gas washing device of the waste gas concentration detector for tunnel construction according to claim 1, wherein a block (13) is connected in a sealing manner in the pressure stabilizing chamber (34), a spring (14) is fixedly connected to the bottom of the block (13), a pressure stabilizing channel (15) is arranged in the block (13), a pressure stabilizing membrane (16) is connected in the pressure stabilizing channel (15) in a sealing manner, a piezoelectric ceramic plate (17) is respectively arranged on two sides of the block (13), and the two piezoelectric ceramic plates (17) are electrically connected with the pressure stabilizing membrane (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010590132.XA CN111707621B (en) | 2020-06-24 | 2020-06-24 | Waste gas concentration detects quick-witted gas washing device for tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010590132.XA CN111707621B (en) | 2020-06-24 | 2020-06-24 | Waste gas concentration detects quick-witted gas washing device for tunnel construction |
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| CN111707621A CN111707621A (en) | 2020-09-25 |
| CN111707621B true CN111707621B (en) | 2023-09-29 |
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| CN112196611B (en) * | 2020-10-12 | 2022-07-12 | 重庆工程职业技术学院 | Gas drainage water-vapor separation device |
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Effective date of registration: 20230904 Address after: No.888-2, maizhiqiao East Road, Longtouwang village, Luqiao District, Taizhou City, Zhejiang Province 318050 Applicant after: Taizhou Luqiao Mingtai Sheet Metal Co.,Ltd. Address before: 030200 Shanxi Xishan Coal Power Co., Ltd., No. 48, Xiqu street, Xiqu village, Gujiao City, Taiyuan City, Shanxi Province Applicant before: Wu Wenxu |
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