CN208125598U - A kind of revolving scanning formula pernicious gas laser detector - Google Patents
A kind of revolving scanning formula pernicious gas laser detector Download PDFInfo
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- CN208125598U CN208125598U CN201820663852.2U CN201820663852U CN208125598U CN 208125598 U CN208125598 U CN 208125598U CN 201820663852 U CN201820663852 U CN 201820663852U CN 208125598 U CN208125598 U CN 208125598U
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- 230000000505 pernicious effect Effects 0.000 title abstract 2
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 238000001285 laser absorption spectroscopy Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000835 electrochemical detection Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a kind of revolving scanning formula pernicious gas laser detectors, the device includes laser transmitting-receiving device all the way, it is characterized in that, the laser transmitting-receiving device is fixed on rotary head, which is vertically connected with and is formed by actuating unit and adjustment support；Wherein, the actuating unit is made of turntable, turbine worm reducer and stepper motor, wherein the turntable is fixed on the output shaft of turbine worm reducer；The adjustment support includes I-shaped attachment base, steel ball and lower seat board, wherein the steel ball is clamped between the attachment base and lower seat board by four bolts, and the centre of sphere of the steel ball is passed through in the attachment base and lower seat board central axes.The present apparatus only needs a set of laser transmitting-receiving device, has the advantages that low equipment investment and use cost are low.
Description
Technical Field
The utility model relates to a test or analysis material with the help of the chemistry or the physical properties of laser survey material, concretely relates to adopt gaseous device of near-infrared semiconductor laser absorption spectroscopy survey.
Background
There are many toxic and harmful gases to be involved in production, transportation and storage in industrial processes, such as CH for oil and gas extraction and transportation4And H2S gas, CO gas as fuel gas used in steel works, HF gas stored in nuclear industrial park, etc., wherein CH4And CO gas is a colorless, odorless, flammable and explosive gas, H2S gas and HF gas are highly toxic gases. Because of the complex pipelines and the more valves in the industrial plant area, the risk of dangerous gas leakage is easily caused, and explosion and casualties can be caused in severe cases. At present, many scientific research units and enterprises in China have successfully developed an open-type laser-based gas online monitoring system, the optical gas monitoring system can realize real-time monitoring of the concentration of toxic and harmful gas in the atmospheric environment, and compared with the traditional electrochemical detection method which can only measure gas leakage in one point area, the optical method has the advantages of wide monitoring range, high response speed, high sensitivity, no cross interference and the like, so that the optical method has the advantages of wide monitoring range, high response speed, high sensitivity, no cross interference and the likeThe method is widely applied to toxic and harmful gas leakage monitoring and early warning in industrial plants.
The invention patent application with the publication number of CN1888865A discloses an open type multi-path monitoring method and an optical path structure for natural gas leakage. This patent has proposed an open natural gas leakage multichannel monitoring method and light path structure based on tunable semiconductor laser absorption spectroscopy technique, and the infrared laser that the laser instrument in the mainframe box transmitted passes through N output of 1 х N photoswitch and exports N cassegrain type's receiving and dispatching optics telescope transmission in proper order to it reflects the telescope of looking far away by its place many component angle reflection mirror group of place in the place ahead of corresponding N and surveys, therefore this scheme utilizes one set of laser system to combine N sets of optical transceiver to realize gaseous multichannel measurement. However, the above scheme requires installation of multiple sets of optical transceivers and multiple optical fibers, and has a complicated laying process and a large amount of post-maintenance.
Disclosure of Invention
The utility model aims to solve the technical problem that a rotation scanning formula harmful gas laser detection device is provided, the device only need one set of laser transceiver, has the advantage that equipment investment province and use cost are low.
The utility model provides an above-mentioned problem technical scheme as follows:
a rotary scanning type harmful gas laser detection device comprises a laser transceiver, and is characterized in that the laser transceiver is fixed on a rotary holder, and the rotary holder is formed by connecting a power transmission device and an adjusting support up and down; wherein,
the power transmission device consists of a rotary disc, a worm and gear speed reducer and a stepping motor, wherein the rotary disc is fixed on an output shaft of the worm and gear speed reducer;
the adjusting support comprises an I-shaped connecting seat, a steel ball and a lower seat plate, wherein the steel ball is clamped between the connecting seat and the lower seat plate by four bolts, and the central axes of the connecting seat and the lower seat plate pass through the spherical center of the steel ball.
In order to adjust the axis of the laser transceiver to be horizontal through the adjusting support, one improvement of the laser detection device is that a level is arranged on the outer side surface of the laser transceiver.
Because the laser detection device is fixed on the rotating holder, the laser receiving and transmitting device is controlled to rotate for 360 degrees, and a plurality of reflectors are arranged around the monitored area, so that multi-point monitoring can be carried out. In addition, the laser detection device only needs one set of laser receiving and transmitting device, so that the equipment investment is saved, and the engineering quantity and the later maintenance workload are greatly reduced compared with the prior art.
Drawings
Fig. 1 to 4 are schematic structural views of an embodiment of the rotary scanning type harmful gas laser detection apparatus according to the present invention, in which fig. 1 is a front view, fig. 2 is a right side view, fig. 3 is a rear view, and fig. 4 is a structure enlarged view of a part i in fig. 1.
Fig. 5 is a schematic view of a connection structure between the turntable and the laser transceiver and the worm gear reducer in the embodiment shown in fig. 1 to 4 (a cross section is taken along a circle center of the dual-window mirror protection cylinder shown in fig. 2, but the worm gear reducer is not cut), and fig. 6 is an enlarged view of a portion ii in fig. 5.
Fig. 7 is a schematic diagram of a method for using the laser detection device, wherein the dashed arrows indicate the transmission path of the laser, and the circles with arrows indicate the rotation track of the laser detection device according to the present invention.
Detailed Description
Referring to fig. 1 to 3, the laser detection device comprises a rotating holder and a laser transceiver 1 fixed on the rotating holder.
Referring to fig. 5, the laser transceiver 1 has the same structure as a conventional laser transceiver, and specifically includes a transceiver chamber 1-1 and a double-window mirror protection cylinder 1-2 disposed at the front end of the transceiver chamber, wherein an inverted V-shaped double-window mirror 1-3 is disposed in the double-window mirror protection cylinder 1-2; a Fresnel lens 1-4 is arranged at the front end of the transceiving chamber 1-1, and a detector support 1-5 is arranged at the rear part of the transceiving chamber 1-1 relative to the Fresnel lens 1-4; the center of the Fresnel lens 1-4 is embedded with a collimating lens 1-6, a detector support 1-5 is provided with a detector 1-7, and the detector 1-7 is positioned on the focus of the Fresnel lens 1-4. The rear part of the receiving and dispatching room 1-1 is provided with an optical fiber and cable connector 1-8.
Referring to fig. 1-6, the rotary holder is formed by connecting a power transmission device and an adjusting support up and down; the power transmission device consists of a turntable 2, a worm and gear speed reducer 3 and a stepping motor 4. Wherein, the turntable 2 is connected and fixed on the output shaft of the worm gear speed reducer 3 by a flat key 5; the stepping motor 4 is fixed on the worm gear speed reducer 3 by a support plate 6, and an output shaft of the stepping motor is connected with an input shaft of the worm gear speed reducer 3 by a sleeve coupling 7. The adjusting support comprises an I-shaped connecting seat 8, a steel ball 9 and a lower seat plate 10, wherein an upper wing edge 8-1 of the I-shaped connecting seat 8 is fixed with the worm gear speed reducer 3, four countersunk head bolts 11 penetrate between a lower wing edge 8-2 and the lower seat plate 10, the steel ball 9 is clamped between the upper wing edge and the lower wing edge, and the center of the ball 9 is located on the central axis of the connecting seat 8 and the lower seat plate 9. The lower seat plate 10 is provided with four hexagon head bolts 13 for fixing the whole device.
Referring to fig. 2 and 3, a leveling instrument 12 is arranged on the outer side surface of the laser transceiver 1 so as to adjust four countersunk bolts 11 to adjust the axis of the laser transceiver 1 to be horizontal.
A specific use method of the laser detection device is briefly described below with reference to the accompanying drawings.
Referring to fig. 7 in combination with fig. 1 to 3, the laser detection device 14 is installed in the center of an area to be monitored, then four countersunk bolts 11 are adjusted, the axis of the laser transceiver 14 is adjusted to be horizontal, and the pitching angle deviation in each direction in the rotation process is avoided; meanwhile, 6 reflectors A-F are arranged around the monitored area. Then, the whole laser detection device is started to repeatedly rotate 360 degrees clockwise-anticlockwise, and finally the absorption spectrum returned by the 6 reflectors A-F is converted into an electric signal to be output.
Claims (2)
1. A rotary scanning type harmful gas laser detection device comprises a laser transceiver, and is characterized in that the laser transceiver is fixed on a rotary holder, and the rotary holder is formed by connecting a power transmission device and an adjusting support up and down; wherein,
the power transmission device consists of a rotary disc, a worm and gear speed reducer and a stepping motor, wherein the rotary disc is fixed on an output shaft of the worm and gear speed reducer;
the adjusting support comprises an I-shaped connecting seat, a steel ball and a lower seat plate, wherein the steel ball is clamped between the connecting seat and the lower seat plate by four bolts, and the central axes of the connecting seat and the lower seat plate pass through the spherical center of the steel ball.
2. The rotary scanning type laser detector for harmful gases as claimed in claim 1, wherein a level is provided on the outer side of said laser transmitter/receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820663852.2U CN208125598U (en) | 2018-05-07 | 2018-05-07 | A kind of revolving scanning formula pernicious gas laser detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820663852.2U CN208125598U (en) | 2018-05-07 | 2018-05-07 | A kind of revolving scanning formula pernicious gas laser detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208125598U true CN208125598U (en) | 2018-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820663852.2U Active CN208125598U (en) | 2018-05-07 | 2018-05-07 | A kind of revolving scanning formula pernicious gas laser detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208125598U (en) |
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2018
- 2018-05-07 CN CN201820663852.2U patent/CN208125598U/en active Active
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