CN209841675U - Infrared methane gas intelligent detector for underground pipe network - Google Patents
Infrared methane gas intelligent detector for underground pipe network Download PDFInfo
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- CN209841675U CN209841675U CN201920744665.1U CN201920744665U CN209841675U CN 209841675 U CN209841675 U CN 209841675U CN 201920744665 U CN201920744665 U CN 201920744665U CN 209841675 U CN209841675 U CN 209841675U
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Abstract
The utility model belongs to the methane detector field, concretely relates to infrared methane gas intelligent detector of underground pipe network. To the problem that methane gas detector precision is not high among the prior art, the utility model discloses an infrared methane gas intelligent detector of underground pipe network, including shell (1), mounting bracket (3), air inlet (10) and gas outlet (11), be connected with infrared light source (4), temperature sensor (5), go up speculum (8), survey component (6) and reference element (7) on the mounting bracket, be provided with in shell (1) and be parallel to each other and lower speculum (9) that the position corresponds with last speculum (8), after the infrared light that infrared light source (4) sent is through revolving mirror (14), last speculum (8) and lower speculum (9) reflection, shine on survey component (6) and reference element (7). The utility model is suitable for a methane gas's in the underground pipe network monitoring.
Description
Technical Field
The utility model belongs to the methane detector field, concretely relates to infrared methane gas intelligent detector of underground pipe network.
Background
Along with the continuous promotion of urbanization process, municipal underground pipe networks are rapidly increased, correspondingly, gas explosion or personnel poisoning accidents of the urban underground pipe networks also occur in recent years, one reason is that the underground pipe networks are wet and relatively closed, and a large amount of flammable, explosive, toxic and harmful gas such as CH is decomposed by waste water and sewage4、H2S, CO, such gases are accumulated in the space of the underground pipe network, and once the concentration exceeds the standard, accidents of explosion or personnel poisoning can be caused; another reason is that gas piping networks leak as the gas piping is lost over time. Meanwhile, as the underground pipe network is positioned in urban areas with dense population, once an accident occurs, huge losses are brought to lives and properties of people. The main component in the gas generated by microbial fermentation in the underground sewage pipeline is methane, and the main component in the fuel gas is also methane, so that the monitoring of the methane concentration in the underground pipe network is very important.
The existing methane detector generally adopts a non-dispersive infrared detection (NDIR) technology, uses an electrical modulation infrared light source based on a Lambert-beer absorption law of gas to infrared light absorption, adopts single-path dual-wavelength measurement, namely, one infrared light source sends out an infrared signal which is absorbed by a detection element and a reference element and generates different electric signals, and then the infrared signal is combined with a temperature signal provided by a temperature sensor and identified and compared by a control circuit to calculate the true value of the current methane concentration. The control chip identifies the safe concentration environment and the dangerous concentration environment of methane, lights diodes with different colors to remind operators, and can transmit the early warning information to the remote control center in a wireless or wired transmission mode.
However, the existing methane gas detector has the problem of low precision, the existing methane gas detector used in the underground pipe network is a common methane gas detector in coal mines, and a methane gas detector specially designed for the underground pipe network is not provided, but the environment in the coal mines is different from that in the underground pipe network, and the underground pipe network is more humid. The water vapor has strong absorption effect on infrared light, so that the measurement result is inaccurate. Therefore, there is a need for improvements to existing methane gas detectors.
SUMMERY OF THE UTILITY MODEL
Problem to methane gas detector precision is not high among the prior art, the utility model provides an infrared methane gas intelligent detector of underground pipe network, its aim at: the accuracy of the methane gas detector is improved.
The utility model adopts the technical scheme as follows:
the utility model provides an infrared methane gas intelligent detector of underground pipe network, includes shell, mounting bracket, air inlet and gas outlet, mounting bracket and shell fixed connection, be connected with infrared light source, temperature sensor, last speculum, survey component and reference element on the mounting bracket, be provided with in the shell with last speculum parallel to each other and the lower speculum that the position corresponds, infrared light source sets up the one end at last speculum, the one end of speculum is provided with the rotating mirror down, infrared light source corresponds with the position of rotating mirror, survey component and reference element set up as an organic whole, line between infrared light source and the survey component and the pivot mutually perpendicular of rotating mirror, the pivot of rotating mirror is parallel to each other with lower speculum.
After the technical scheme is adopted, infrared light emitted by the infrared light source is reflected by the rotating mirror, then irradiates the upper reflecting mirror, is reflected for multiple times between the upper reflecting mirror and the lower reflecting mirror, and finally irradiates the measuring element and the reference element, the optical path of the infrared light passing through the device is lengthened, the infrared light is absorbed by more methane in the device, and the accuracy of the methane detector is higher.
Preferably, be connected with pivot II on the rotating mirror, II both ends of pivot pass through the bearing with the shell and are connected, are connected with driven gear on the pivot II, are provided with pivot I on the shell, and I one end of pivot is connected with driven gear complex driving gear, and the I other end of pivot stretches out the shell and is connected with the knob.
After the technical scheme is adopted, the knob is rotated to drive the driving gear to rotate, the driving gear drives the driven gear to rotate, so that the rotating mirror is driven to rotate, the light path of infrared light is changed after the rotating mirror rotates, the times of reflecting the infrared light between the upper reflecting mirror and the lower reflecting mirror are changed accordingly, correspondingly, the precision of the methane detector is changed accordingly, and the precision adjusting function of the methane detector is realized.
Preferably, the diameter of the driving gear is smaller than that of the driven gear.
After the technical scheme is adopted, the driving gear rotates for a plurality of circles, the driven gear can rotate for one circle, the angle of the rotating mirror can be conveniently and accurately adjusted, and the accuracy adjustment of the methane detector accuracy is realized.
Preferably, the drying device further comprises a moisture-proof layer, a drying agent is arranged in the moisture-proof layer, the moisture-proof layer is barrel-shaped, and the outer surface of the moisture-proof layer is connected with the inner surface of the shell.
After the technical scheme is adopted, water vapor entering the device is absorbed by the moisture-proof layer, and errors caused by the water vapor can be eliminated.
Preferably, hydrophobic membranes are arranged in the air inlet and the air outlet.
After the technical scheme is adopted, only air molecules in the detected gas can pass through the hydrophobic membrane, and water molecules cannot pass through the hydrophobic membrane, so that errors caused by water vapor are further eliminated.
Preferably, the air inlet and the air outlet are provided with protective covers outside, and the protective covers are provided with a plurality of through holes.
After the technical scheme is adopted, the protective cover can protect the hydrophobic membrane from being damaged by solid particles, and the protective cover is provided with the through hole, so that the measured gas is not influenced to enter and exit.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. infrared light emitted by the infrared light source is reflected by the rotating mirror, then irradiates the upper reflecting mirror, is reflected for multiple times between the upper reflecting mirror and the lower reflecting mirror, and finally irradiates the measuring element and the reference element, the optical path of the infrared light passing through the device is lengthened, the infrared light is absorbed by more methane in the device, and the accuracy of the methane detector is higher.
2. The shell outside sets up the knob, and rotatory knob drives the driving gear rotatory, and the driving gear drives driven gear rotatory to drive the rotating mirror and rotate, change the light path of infrared light after the rotating mirror rotates, the number of times that the infrared light reflects also changes thereupon between last speculum and lower speculum, and is corresponding, and methane detector's precision also changes thereupon, realizes the regulation to methane detector precision.
3. The driving gear is smaller than the driven gear, and the driving gear rotates several circles, and the driven gear can only rotate the round, makes things convenient for the angle of accurate regulation rotating mirror, realizes the accurate regulation of methane detector precision.
4. Set up the dampproof course, the steam that gets into in the device is absorbed by the dampproof course, can eliminate the error that steam brought.
5. The air inlet and the air outlet are provided with hydrophobic membranes, only air molecules in the detected gas can pass through the hydrophobic membranes, and water molecules cannot pass through the hydrophobic membranes, so that errors caused by water vapor are further eliminated.
6. The air inlet and the initial port are provided with protective covers to protect the hydrophobic membrane from being damaged by solid particles, and the protective covers are provided with through holes to avoid influencing the inlet and outlet of the gas to be detected.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is a partially enlarged view of a portion B in fig. 1.
The device comprises a shell, a moisture-proof layer 2, a mounting frame 3, an infrared light source 4, a temperature sensor 5, a measuring element 6, a reference element 7, an upper reflector 8, a lower reflector 9, an air inlet 10, an air outlet 11, a hydrophobic membrane 12, a protective cover 13, a rotating mirror 14, a driven gear 15, a driving gear 16, a rotating shaft I17, a rotating shaft II 18 and a knob 19.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
The present invention will be described in detail with reference to fig. 1 to 3.
An infrared methane gas intelligent detector for an underground pipe network comprises a shell 1, a mounting rack 3, a gas inlet 10 and a gas outlet 11. Shell 1 and mounting bracket 3 all adopt the stainless steel to make, mounting bracket 3 and 1 welded connection of shell, be connected with infrared light source 4, temperature sensor 5 on the mounting bracket, go up speculum 8, survey component 6 and reference component 7. The infrared light source 4 adopts an infrared light emitting tube. Be provided with in the shell 1 with last speculum 8 be parallel to each other and the lower speculum 9 that the position corresponds, infrared source 4 sets up the one end at last speculum 8, the one end of speculum 9 is provided with rotating mirror 14 down, infrared source 4 corresponds with rotating mirror 14's position, survey component 6 and reference element 7 set up as an organic whole, line between infrared source 4 and the survey component 6 and rotating mirror 14's pivot mutually perpendicular, rotating mirror 14's pivot and lower speculum 9 are parallel to each other.
This arrangement ensures that the infrared light from the infrared light source 4 is reflected by the rotating mirror 14 and then impinges on the upper reflecting mirror 8, is reflected between the upper reflecting mirror 8 and the lower reflecting mirror 9 a plurality of times, and finally impinges on the measuring element 6 and the reference element 7. By arranging the rotating mirror 4, the upper reflecting mirror 8 and the lower reflecting mirror 9, the optical path of infrared light passing through the device is lengthened, and the infrared light is absorbed by methane in the device more, so that the methane detector has higher precision.
Preferably, be connected with II 18 of pivot on the rotatory mirror 14, II 18 both ends of pivot are connected through the bearing with shell 1, are connected with driven gear 15 on II 18 of pivot, are connected with I17 of pivot through the bearing on the shell 1, and I17 one end of pivot is connected with driven gear 15 complex driving gear 16, and the I17 other end of pivot stretches out shell 1 and is connected with knob 19, is provided with the decorative pattern on the knob 19 and is used for the antiskid.
Rotatory knob 19, driving gear 16 rotates, and driving gear 16 drives driven gear 15 rotatory to drive rotating mirror 14 and rotate, rotating mirror 14 rotates the light path that changes the infrared light after, and the number of times that the infrared light reflected between last speculum 8 and lower speculum 9 changes thereupon, and the corresponding change of light path, the utility model discloses a precision also changes thereupon, realizes the regulation to the precision. Or the motor is connected with the rotating shaft I17, the motor is externally connected with a control circuit, and the automatic control is realized.
Preferably, the diameter of driving gear 16 is less than driven gear 15's diameter, and the angle of convenient accurate adjustment rotating mirror 14 is realized right the utility model discloses the accurate regulation of precision.
Preferably, the solar water heater further comprises a moisture-proof layer 2, a drying agent is arranged in the moisture-proof layer 2, the moisture-proof layer 2 is barrel-shaped, and the outer surface of the moisture-proof layer 2 is connected with the inner surface of the shell 1. The moisture entering the device is absorbed by the moisture-proof layer, and the error caused by the moisture can be eliminated.
Preferably, a hydrophobic membrane 12 is disposed in the air inlet 10 and the air outlet 11. The characteristic that the hydrophobic membrane 12 only allows air molecules to pass through enables the water vapor content in the device to be further reduced, and the error of the device is smaller.
Further preferably, a protective cover 13 is arranged outside the air inlet 10 and the air outlet 11, and a plurality of through holes are formed in the protective cover 13. The protective cover 13 protects the hydrophobic membrane 12 from being damaged by solid particles, and the protective cover 13 is provided with through holes, so that the measured gas inlet and outlet are not influenced.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (6)
1. The utility model provides an infrared methane gas intelligent detector of underground pipe network, includes shell (1), mounting bracket (3), air inlet (10) and gas outlet (11), its characterized in that: mounting bracket (3) and shell (1) fixed connection, be connected with infrared source (4), temperature sensor (5), go up speculum (8), survey component (6) and reference component (7) on the mounting bracket, be provided with in shell (1) with last speculum (8) be parallel to each other and lower speculum (9) that the position corresponds, infrared source (4) set up the one end at last speculum (8), the one end of speculum (9) is provided with rotating mirror (14) down, infrared source (4) correspond with the position of rotating mirror (14), survey component (6) and reference component (7) and set up as an organic whole, line between infrared source (4) and the survey component (6) and the pivot mutually perpendicular of rotating mirror (14), the pivot of rotating mirror (14) is parallel to each other with lower speculum (9).
2. The infrared methane gas intelligent detector of the underground pipe network according to claim 1, characterized in that a rotating shaft II (18) is connected to the rotating mirror (14), two ends of the rotating shaft II (18) are connected with the casing (1) through bearings, a driven gear (15) is connected to the rotating shaft II (18), a rotating shaft I (17) is arranged in the casing (1) in a penetrating manner, one end of the rotating shaft I (17) is connected with a driving gear (16) matched with the driven gear (15), and the other end of the rotating shaft I (17) extends out of the casing (1) and is connected with a knob (19).
3. An intelligent infrared methane gas detector for underground pipe networks according to claim 2, characterized in that the driving gear (16) has a smaller diameter than the driven gear (15).
4. The infrared methane gas intelligent detector of claim 1, further comprising a moisture barrier (2), wherein a desiccant is disposed in the moisture barrier (2), the moisture barrier (2) is barrel-shaped, and the outer surface of the moisture barrier (2) is connected with the inner surface of the casing (1).
5. An intelligent infrared methane gas detector for underground pipe networks according to claim 1, characterized in that a hydrophobic membrane (12) is arranged in the gas inlet (10) and the gas outlet (11).
6. The infrared methane gas intelligent detector of claim 1, wherein a protective cover (13) is arranged outside the gas inlet (10) and the gas outlet (11), and a plurality of through holes are arranged on the protective cover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744665.1U CN209841675U (en) | 2019-05-23 | 2019-05-23 | Infrared methane gas intelligent detector for underground pipe network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920744665.1U CN209841675U (en) | 2019-05-23 | 2019-05-23 | Infrared methane gas intelligent detector for underground pipe network |
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| CN209841675U true CN209841675U (en) | 2019-12-24 |
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| CN201920744665.1U Active CN209841675U (en) | 2019-05-23 | 2019-05-23 | Infrared methane gas intelligent detector for underground pipe network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649389A (en) * | 2020-12-07 | 2021-04-13 | 珠海格力电器股份有限公司 | Sensor optical path component, gas sensor, measuring method and air conditioning system |
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2019
- 2019-05-23 CN CN201920744665.1U patent/CN209841675U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649389A (en) * | 2020-12-07 | 2021-04-13 | 珠海格力电器股份有限公司 | Sensor optical path component, gas sensor, measuring method and air conditioning system |
| CN112649389B (en) * | 2020-12-07 | 2022-03-08 | 珠海格力电器股份有限公司 | Sensor optical path component, gas sensor, measuring method and air conditioning system |
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