CN218098857U - Air chamber device for measuring range detection of laser gas detector - Google Patents
Air chamber device for measuring range detection of laser gas detector Download PDFInfo
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- CN218098857U CN218098857U CN202221928720.0U CN202221928720U CN218098857U CN 218098857 U CN218098857 U CN 218098857U CN 202221928720 U CN202221928720 U CN 202221928720U CN 218098857 U CN218098857 U CN 218098857U
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Abstract
The utility model discloses an air chamber device for laser gas detector range detects, include: the air chamber pipeline, the light-transmitting port, the glass slide and the sensor; the air chamber pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are used for controlling the air pressure and the air concentration in the air chamber pipeline so as to facilitate the air chamber pipeline to be filled with the gas to be detected; the light through ports are arranged at two ends of the air chamber pipeline; the slide is detachably arranged on the light through port; the sensor is arranged inside the air chamber pipeline. The concentration of the gas to be detected in the gas chamber pipeline is controlled by controlling the ventilation rate and time of the gas inlet and the gas outlet, so that the gas chamber pipeline is filled with the gas to be detected conveniently, and the measuring range of the open-circuit laser gas detector is detected conveniently; through with air chamber pipeline and solid fixed ring threaded connection, the convenient to detach slide when the slide receives the pollution, easily changes the slide, and is convenient for open and leads to the light mouth and guarantee that the air chamber pipeline looses gas fast.
Description
Technical Field
The utility model relates to an optics air chamber technical field, more specifically say, relate to an air chamber device that is used for laser gas detector range to detect.
Background
In recent years, the economic strength of China is increasing day by day, the energy demand is increasing continuously, and in order to promote sustainable development and green development, china has gradually adjusted the energy distribution structure, and the energy is changed from the previous coal energy to the current natural gas energy. The main component of natural gas is alkane, wherein methane accounts for the most part. In the process of exploiting, transporting and storing natural gas, various leakage problems always exist inevitably, once the gas leakage is not found and processed in time, serious consequences can be brought, so that not only can huge economic loss be brought, but also the life safety of people is greatly harmed, and adverse social effects are caused, therefore, the development of a detector capable of effectively and timely detecting the gas leakage is particularly important.
The open-circuit laser gas detector is a detector capable of timely, stably and accurately detecting the product value of the concentration and the distance of the gas to be detected. The open-circuit laser gas detector has the advantages of high response speed, high measurement precision, strong anti-interference capability, long service life and the like, does not have the phenomena of harmful gas poisoning, aging and the like, and has important market application prospect in the field of gas sensors. The working principle is based on the principle of infrared spectrum absorption, and the relationship between the light absorption intensity and the concentration and length of gas molecules meets the Lambert-beer law. Therefore, the accurate detection of the product value of the specific gas concentration and the distance can be realized by detecting the change of the light absorption intensity of the specific wavelength after the interaction with the gas molecules.
In addition, as the tubular optical air chamber has a longer range, the gas to be detected in the open optical air chamber is not easy to be uniformly distributed, so that the concentration of the gas to be detected in the optical air chamber is different, and the accuracy of range detection is further influenced.
The above disadvantages need to be improved. Therefore, a gas cell device capable of detecting the range of the open laser gas detector is developed to solve the above problems.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, the utility model provides an air chamber device for laser gas detector range detects.
The utility model discloses technical scheme as follows:
a gas cell device for laser gas detector range detection, comprising: a gas chamber pipeline, a light opening, a glass slide and a sensor; the air chamber pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are used for controlling the air pressure and the air concentration in the air chamber pipeline so as to facilitate the air chamber pipeline to be filled with the gas to be detected; the light through ports are arranged at two ends of the air chamber pipeline; the slide is detachably arranged on the light through port; the sensor sets up the outside of air chamber pipeline, the probe of sensor stretches into the inside of air chamber pipeline, and the probe stretches into the limited length of air chamber pipeline axle for during the gas in the air chamber pipeline can get into the sensor, detect gas, and can not shelter from the light path, the sensor is used for detecting the inside gaseous concentration that awaits measuring of air chamber pipeline.
The two ends of the air chamber pipeline are provided with fixing rings, the fixing rings are in threaded connection with the air chamber pipeline, and the fixing rings are used for fixing the glass slides.
The bottom of the air chamber pipeline is provided with a foundation, the foundation is used for fixing the air chamber pipeline, the air chamber pipeline is prevented from rolling, and the foundation is fixed through fasteners such as bolts, so that the air chamber pipeline is fixed to a proper position conveniently.
The fixing ring is arranged between the air chamber pipeline and the sealing ring, so that the air tightness of the air chamber pipeline is guaranteed, the gas to be detected is prevented from leaking, and the environment is protected.
The fan is arranged in the air chamber pipeline and accelerates the movement of the gas to be measured in the air chamber pipeline, so that the gas to be measured is uniformly dispersed in each part of the air chamber pipeline.
Furthermore, the fans are provided with a plurality of pairs, and the air openings of the fans are oppositely arranged, so that the gas to be detected can form convection in the air chamber pipeline and can be rapidly dispersed.
Furthermore, the fans are arranged along the axial direction of the air chamber pipeline in a staggered mode, so that the gas to be measured is uniformly distributed in the axial direction of the air chamber pipeline.
Further, the air chamber pipeline outside is provided with control panel, control panel with the sensor fan electric connection is convenient for control optics air chamber's operation through control panel.
The sensor is a point type gas sensor, the sensor is arranged at two ends close to the gas chamber pipeline, and the point type gas sensor is small in size, compact in structure and convenient to install in the gas chamber pipeline.
The gas chamber pipeline outside is provided with the display gauge outfit, the display gauge outfit with sensor electric connection is convenient for read the gas concentration in the gas chamber pipeline.
The glass slide is a calcium fluoride glass slide and is high in transmittance of infrared light, so that the normal transmission of infrared light is ensured, and the detection precision is ensured.
According to the above scheme the utility model discloses, its beneficial effect lies in:
1. the utility model controls the concentration of the gas to be detected in the gas chamber pipeline by controlling the ventilation rate and time of the gas inlet and the gas outlet, so that the gas chamber pipeline is filled with the gas to be detected, thereby facilitating the detection of the range of the open-circuit laser gas detector; through with air chamber pipeline and solid fixed ring threaded connection, convenient to detach slide, when the slide receives the pollution, be liable to change slide, and be convenient for open logical light mouth and guarantee that the air chamber pipeline looses the gas fast.
2. The utility model discloses can design the air chamber pipeline of different length in practical application, the air chamber pipeline of different length can be applicable to the laser gas detector of different ranges.
3. The utility model discloses well optics air chamber adopts the tubulose air chamber, and the tubulose air chamber is compared in the advantage of square air chamber and lies in that the tubulose air chamber processing degree of difficulty is little, and is small, and the gas that awaits measuring of consumption is few.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic diagram of the local structure explosion of the present invention.
Wherein, in the figures, the various reference numbers: 1. an air chamber conduit; 11. an air inlet; 12. an air outlet; 13. a light-through port; 14. glass slide; 15. an installation chamber; 2. a sensor; 3. a fixing ring; 4. a seal ring; 5. a fan; 6. a control panel; 7. and displaying the meter head.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "fixed" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. "Multi" means two or more unless specifically limited otherwise.
As shown in fig. 1 and fig. 2, a gas cell device for range detection of a laser gas detector according to the present invention includes: the gas chamber pipeline 1, the light-transmitting port 13, the glass slide 14 and the sensor 2; the air chamber pipeline 1 is provided with an air inlet 11 and an air outlet 12.
In this example, the length of the gas chamber pipe 1 is 2.2m, the open-circuit laser gas detector for measuring the range of 2 lel.m, the maximum range that can be measured by introducing 90 LEL gas is 2 lel.m, the optical path length of the light-passing gas chamber is equal to the detector range divided by 0.9, the laser emitted by the open-circuit laser gas detector is emitted from the light-passing port 13 at one end of the gas chamber pipe 1, passes through the gas to be measured in the gas chamber pipe 1 and then is emitted from the light-passing port 13 at the other end of the gas chamber pipe 1, the glass 14 at the light-passing port 13 is made of calcium fluoride glass 14 or other glass 14 that can transmit infrared light highly, so as to ensure that the infrared light can transmit normally, the concentration of the gas to be measured in the gas chamber is controlled by controlling the speed and time of the gas inlet 11, the gas outlet is controlled by controlling the gas outlet 12 so that the gas pressure of the gas chamber pipe 1 can be kept constant during the air ventilation, the concentration of the gas to be measured in the gas chamber pipe 1 is monitored by the sensor 2, so as to detect the range of the open-passing laser gas detector, the different concentrations of the gas to be measured have different light absorption intensities, and the corresponding relationship between the non-linear absorption relationship between the light absorption relationship between the product value and the light absorption distance. When the product value change quantity of the gas concentration to be measured and the distance is ensured to be the same, the larger the product value of the gas concentration to be measured and the distance is, the smaller the change quantity of the light absorption intensity is. When the value of the product of the concentration of the gas to be measured and the distance has a fixed amount of change, for example, 1%LEL m, the amount of change in the light absorption intensity is not substantially discriminated or is of the same order as the amount of change caused by external disturbance or noise itself, and the value of the product of the concentration of the gas to be measured and the distance at that time is considered to be the measurement range of the laser gas detector. The utility model discloses at practical application's in-process, air chamber pipeline 1's actual length designs according to the range of the laser gas detector of opening a way, can know by lambert-beer law, the infrared light depends on gas molecule concentration and gas length to gaseous absorption intensity, under the circumstances that maximum gas concentration keeps unchangeable, and guarantee that the gas chamber interior maximum gas concentration is less than the explosion lower limit, gas length is longer more, the range that the detector can survey is big more, in addition, cylinder air chamber structure cross section is less, light path length is longer, be used for the laser gas detector of opening a way of high range of calibration frequently.
In a preferred example, as shown in fig. 2, the two ends of the gas chamber pipeline 1 are connected with fixing rings 3 by screw threads, a sealing ring 4 is arranged between the fixing ring 3 and the gas chamber pipeline 1, the sealing ring 4 can improve the air tightness of the gas chamber pipeline 1 and prevent the gas to be measured from escaping, the fixing ring 3 is used for fixing a slide 14, the slide 14 is convenient to detach by connecting the gas chamber pipeline 1 with the fixing ring 3 by screw threads, when the slide 14 is polluted, the slide 14 is easy to replace, and the light opening 13 is convenient to open to ensure that the gas chamber pipeline 1 can rapidly diffuse gas.
In a preferred example, the length of air chamber pipeline 1 is longer, the difficult misce bene of gas, in order to guarantee the homogeneity of the gas concentration that awaits measuring, be provided with a plurality of installation rooms 15 on air chamber pipeline 1, fan 5 installs in installation room 15, be provided with two pairs of fans 5 in air chamber pipeline 1, upper wall and lower wall respectively have a pair ofly, the wind gap of each pair of fan 5 sets up relatively, and fan 5 along 1 axial staggered arrangement of air chamber pipeline, wherein two fans 5 on the left make wind blow right, two fans 5 on the right make wind blow left, make the gas in the air chamber pipeline 1 can realize the circulation convection through four fans 5, make the gas homodisperse that awaits measuring in air chamber pipeline 1, guarantee the homogeneity of the gas concentration that awaits measuring, the utility model discloses at practical application's in-process, the quantity that fan 5 set up designs according to the type of the gas that awaits measuring and the length of air chamber pipeline 1, with guarantee that gas is at air chamber pipeline 1 concentration is even everywhere, guarantee the precision that detects.
In a preferred example, as shown in fig. 1, a control panel 6 is arranged outside the air chamber pipeline 1, the control panel 6 is electrically connected with the sensors 2 and the fan 5, the control panel 6 is used for controlling the opening and closing of the sensors 2 and the fan 5, so as to control the operation of the optical air chamber, the sensors 2 are point type gas sensors, and there is a point type gas sensor around the air chamber pipeline 1, the point type gas sensors are small in size, compact in structure and convenient to integrate into the air chamber pipeline 1, one sensor is arranged around the air chamber pipeline 1, so that the concentration of multiple gas in the air chamber pipeline 1 can be measured, the accuracy of data is ensured, so as to ensure the precision of range detection, according to the requirements of practical application, multiple sensors 2 can be arranged, and the arrangement is performed according to the detection requirements.
In a preferred embodiment, as shown in fig. 1, a display gauge outfit 7 is arranged outside the gas chamber pipeline 1, the display gauge outfit 7 is electrically connected with the sensor 2, the display gauge outfit 7 and the sensor 2 correspond to each other one to one, the sensor 2 transmits the concentration data of the gas to be detected measured in the gas chamber pipeline 1 to the display gauge outfit 7, the display gauge outfit 7 converts the data input by the sensor 2 into a gas concentration value for displaying, so as to facilitate reading by a person, and the uniformity of the gas concentration in the gas chamber pipeline 1 is determined according to the magnitude of the gas concentration of each segment, thereby ensuring that the measurement range of the open-circuit laser gas detector is detected after the gas to be detected is uniformly dispersed in the gas chamber pipeline 1.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A gas cell device for laser gas detector range detection, characterized in that includes:
the air chamber pipeline is provided with an air inlet, an air outlet and a light through port, and the light through ports are arranged at two ends of the air chamber pipeline; a slide is detachably arranged on the light through port;
the sensor, the sensor sets up the outside of air chamber pipeline, the probe of sensor stretches into the inside of air chamber pipeline, the sensor is used for detecting the inside concentration of the gas that awaits measuring of air chamber pipeline.
2. The gas chamber device for measuring range of the laser gas detector as claimed in claim 1, wherein fixing rings are arranged at both ends of the gas chamber pipeline, the fixing rings are in threaded connection with the gas chamber pipeline, and the fixing rings are used for fixing the slide.
3. A gas cell device for measuring range of laser gas detector as claimed in claim 2, wherein a sealing ring is disposed between said fixing ring and said gas cell pipe.
4. A gas cell device for laser gas detector range detection as claimed in claim 1 wherein said gas cell duct is internally provided with a fan.
5. A gas cell device for measuring range of laser gas detector as claimed in claim 4, wherein said fan is provided with a plurality of pairs, and the air ports of each pair of said fans are oppositely arranged.
6. A plenum means for laser gas detector range detection as claimed in claim 5 wherein said fans are staggered axially along said plenum duct.
7. The air chamber device for measuring range of the laser gas detector as claimed in claim 4, wherein a control panel is disposed outside the air chamber pipe, and the control panel is electrically connected to the sensor and the fan.
8. A gas cell device for laser gas detector range detection as claimed in claim 1 wherein said sensor is a point type gas sensor, said sensor being located near both ends of said gas cell tube.
9. The gas cell device for measuring range of the laser gas detector as claimed in claim 1, wherein a display gauge head is arranged outside the gas cell pipeline, and the display gauge head is electrically connected with the sensor.
10. A gas cell device for range detection of laser gas detectors as claimed in claim 1 wherein said slides are high transmission infrared slides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221928720.0U CN218098857U (en) | 2022-07-22 | 2022-07-22 | Air chamber device for measuring range detection of laser gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221928720.0U CN218098857U (en) | 2022-07-22 | 2022-07-22 | Air chamber device for measuring range detection of laser gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218098857U true CN218098857U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221928720.0U Active CN218098857U (en) | 2022-07-22 | 2022-07-22 | Air chamber device for measuring range detection of laser gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218098857U (en) |
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2022
- 2022-07-22 CN CN202221928720.0U patent/CN218098857U/en active Active
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