CN218098858U - Multi-range optical gas chamber for laser gas detector calibration - Google Patents
Multi-range optical gas chamber for laser gas detector calibration Download PDFInfo
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- CN218098858U CN218098858U CN202221933798.1U CN202221933798U CN218098858U CN 218098858 U CN218098858 U CN 218098858U CN 202221933798 U CN202221933798 U CN 202221933798U CN 218098858 U CN218098858 U CN 218098858U
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Abstract
The utility model discloses a multi-range optical air chamber for calibrating a laser gas detector, which comprises an air chamber box body, a light-transmitting port, a glass slide and a sensor, wherein the air chamber box body is provided with an air inlet and an air outlet; the light-transmitting ports are provided with a plurality of pairs, the detection light path lengths of each pair of light-transmitting ports are different, the glass slide is arranged on the light-transmitting ports, the sensor is arranged in the air chamber box body, and the sensor is used for detecting the concentration of the gas to be detected in the air chamber box body. The utility model controls the concentration of the gas to be detected in the air chamber box body by controlling the ventilation speed and time of the air inlet, and the air outlet ensures constant air pressure in the rectangular air chamber box body during ventilation, so that the air chamber box body is full of the gas to be detected with different concentrations, thereby being convenient for calibrating and calibrating the open-circuit laser gas detector; and set up the pipeline through-hole of different length in the air chamber box, is applicable to the calibration and calibration of different ranges open a way laser gas detector.
Description
Technical Field
The utility model relates to an optics air chamber technical field, more specifically say, relate to a multirange optics air chamber for laser gas detector marks.
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 exploitation, transportation and storage of natural gas, various leakage problems always exist inevitably, once the gas leakage is not found and treated 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 accuracy, strong anti-interference capability, long service life and the like, can not generate the phenomena of poisoning, aging and the like of harmful gas, 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.
Most of the existing light-passing air chambers for calibrating and calibrating the open-circuit laser gas detector are air chamber box bodies, the size of each box body is fixed, so that the range is fixed, only one range can be calibrated and calibrated, the effect is single, and the application range is small.
The above disadvantages need to be improved. Therefore, the problem can be solved by developing a light-passing gas chamber which can be used for calibrating and calibrating the open-circuit laser gas detector.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, the utility model provides a multirange optics air chamber for laser gas detector marks.
The utility model discloses technical scheme as follows:
a multi-range optical gas chamber for laser gas detector calibration comprises a gas chamber box body, a light inlet, a glass slide and a sensor, wherein a gas inlet and a gas outlet are formed in the gas chamber box body; the light-passing ports are provided with a plurality of pairs, each pair of light-passing ports are collinear, each pair of light-passing ports are arranged on two opposite surfaces of the gas chamber box body, each pair of light-passing ports are arranged on different side surfaces of the gas chamber box body, the length, the width, the height and the size of the gas chamber box body are different, so that the distances between each pair of light-passing ports are different, namely the measurement of light paths with different lengths can be carried out, the absorption intensity of infrared light to gas depends on the concentration of gas molecules and the length of the gas, and under the condition that the maximum gas concentration is unchanged, the longer the gas length is, the larger the range which can be measured by the detector is, so that the calibration and calibration of the open-circuit laser gas detector with different ranges can be realized; the glass slide is installed on the light-passing opening, the sensor is arranged inside the air chamber box body, and the sensor is used for detecting the concentration of the gas to be detected inside the air chamber box body.
The top of the air chamber box body is provided with a sealing cover, and the sealing cover is opened to facilitate maintenance of parts inside the air chamber box body.
Further, the air chamber box with be provided with the sealing strip between the sealed lid, improve the gas tightness between air chamber box and the sealed lid, prevent gas leakage.
Furthermore, the top of the air chamber box body is provided with a positioning hole, and the bottom of the sealing cover is provided with a positioning column.
Furthermore, the top of the sealing cover is provided with a handle, so that a worker can hold the sealing cover conveniently.
Further, a fan is arranged on the inner wall of the air chamber box body and used for mixing air in the air chamber box body.
Furthermore, the fans are arranged in pairs and are respectively positioned on the opposite inner walls of the air chamber box body.
Further, each pair of the fans are arranged in a staggered mode.
The air chamber box body is further provided with an air outlet, and a negative pressure pump is arranged at the air outlet, so that gas in the air chamber box body can be conveniently pumped out.
The sensor is some type gas sensor, the air chamber box outside is provided with the aviation and connects, some type gas sensor with the aviation connects the electricity even, and the aviation connects sensor power supply and signal transmission inside the air chamber box of being convenient for.
The glass slide is a high-transmittance infrared light slide, such as a calcium fluoride slide, and the calcium fluoride slide has good light transmittance and ensures that infrared light can normally transmit.
According to the scheme, the utility model has the advantages that the concentration of the gas to be detected in the air chamber box body is controlled by controlling the ventilation speed and time of the air inlet, the air outlet ensures that the air pressure in the cuboid air chamber box body is constant during ventilation, so that the air chamber box body is filled with the gas to be detected with different concentrations, and the calibration and calibration of the open-circuit laser gas detector are facilitated; and set up the pipeline through-hole of different length in the air chamber box, is applicable to the calibration and calibration of different ranges open a way laser gas detector.
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 structural view of the sealing cover of the present invention in an open state;
fig. 2 is a schematic structural view of the sealing cover of the present invention in a closed state;
FIG. 3 is a schematic view of the internal structure of the air chamber box of the present invention;
fig. 4 is a schematic perspective view of the sealing cover of the present invention.
Wherein, in the figures, the respective reference numerals: 1. a gas chamber box body; 11. an air inlet; 12. an air outlet; 13. a light through port; 14. glass slide; 15. an exhaust port; 16. a negative pressure pump; 17. positioning holes; 2. a sealing cover; 21. a handle; 22. a positioning column; 3. a sealing strip; 4. a fan; 5. an aviation connector.
Detailed Description
In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. 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. "poly" means two or more unless explicitly defined otherwise.
As shown in fig. 1 to 3, the multi-range optical gas chamber for laser gas detector calibration according to the present invention includes a gas chamber box 1, a light opening 13, a glass slide 14, and a sensor 2; the air chamber box body 1 is provided with an air inlet 11 and an air outlet 12.
In this example, the gas chamber body 1 is a cuboid structure, the long side and the wide side of the cuboid are respectively provided with a light through port 13, taking the ranges of 1 LEL.m and 0.5 LEL.m as an example, the designed light path length and width of the gas chamber body 1 are respectively 1.10m and 0.55m, the range that the gas which is led in 90% LEL can be measured is 1 LEL.m and 0.5 LEL.m, the light path length of the light through gas chamber is equal to the range of the detector divided by 0.9, the laser emitted by the laser emitter passes through the pair of light through ports 13 and the gas to be measured between the light through ports 13, the concentration of the gas to be measured in the gas chamber is controlled by controlling the ventilation rate and time of the gas inlet 11, the gas outlet 12 ensures that the gas pressure of the cuboid gas chamber body 1 is constant during ventilation, the concentration of the gas to be measured in the gas chamber body 1 is monitored by the sensor 2, so as to calibrate and calibrate the laser gas detector. The utility model discloses in-process at practical application, air chamber box 1's size is decided according to the range of the laser gas detector of opening a way, air chamber box 1's length is wide high size is different, thereby make air chamber box 1 have many light paths of different length, can know by lambert-beer law, the infrared light depends on gas molecule concentration and gas length to the absorption intensity of gas, under the condition that maximum gas concentration keeps unchangeable, and guarantee that the interior highest gas concentration of air chamber is less than the explosion lower limit, gas length is longer more, the range that the detector can survey is big more, thereby make many light paths that length is different can be used for satisfying the calibration and the demarcation of the laser gas detector of opening a way of multiple range, cuboid air chamber structure light path length is shorter, be used for the laser gas detector of opening a way of calibration low-range frequently.
In a preferred example, as shown in fig. 1 and 3, fans 4 are arranged on the inner wall of the air chamber box 1, the fans 4 are arranged in pairs and are respectively located on the opposite inner walls of the air chamber box 1, each pair of fans 4 are arranged in a staggered manner, the position design of the two fans 4 can enable the internal gas to form convection, the gas mixing speed can be faster and more uniform, when gas detection is performed, the two fans 4 are opened to ensure the uniformity of the concentration of the gas to be detected in the air chamber box 1, and the calibration and calibration accuracy of the open-circuit laser gas detector are ensured.
In a preferred example, as shown in fig. 1 and 3, 1 to 2 point type gas sensors can be placed inside the gas chamber box 1 for monitoring the concentration of the gas to be measured in the gas chamber box 1, the point type gas sensors are small in size, compact in structure and convenient to integrate into the gas chamber box 1, the point type gas sensors are connected with the outside through the aviation connector 5, the point type gas sensors are powered and receive the detection data of the point type gas sensors through the aviation connector 5, in the process of practical application, the sensors can be directly connected with the gauge heads and are all arranged in the gas chamber box 1, and the concentration of the gas to be measured can be directly read through the gauge heads.
In a preferred example, as shown in fig. 1, a sealing cover 2 is arranged at the top of an air chamber box 1, the installation and maintenance of equipment inside the air chamber box 1 are facilitated, a sealing strip 3 is arranged between the air chamber box 1 and the sealing cover 2 and used for ensuring the sealing performance of a light-through air chamber, gas to be detected is introduced from an air inlet 11, an air outlet 12 is opened and used for ensuring that the air pressure in the air chamber is standard atmospheric pressure, a positioning hole 17 is arranged at the top of the air chamber box 1, a positioning column 22 is arranged at the bottom of the sealing cover 2, the positioning hole 17 is clamped with the positioning column 22, so that the sealing cover 2 is connected with the air chamber box 1 and the positioning column 22 is positioned, and the two are tightly connected.
Furthermore, the handle 21 is arranged at the top of the sealing cover 2, so that the sealing cover 2 is convenient for a worker to take and is convenient to operate.
In a preferred embodiment, the air chamber box 1 is further provided with an air outlet 15, a negative pressure pump 16 is arranged at the air outlet 15, when some gas which is difficult to volatilize or has pungent odor in the air chamber box 1 is dissipated, a valve of the air outlet 15 needs to be opened, air is pumped outwards through the negative pressure pump 16, and therefore some gas which is difficult to volatilize or has pungent odor in the air chamber box 1 can be conveniently discharged.
In a preferred embodiment, a calcium fluoride slide or other slides 14 that can transmit infrared light at the light-transmitting opening 13 is used as the slide 14 to ensure that infrared light can transmit normally.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. A multi-range optical gas cell for laser gas detector calibration, comprising:
the gas chamber box body is provided with a gas inlet, a gas outlet and a light through port, the light through port is provided with a plurality of pairs, the detection light path length of each pair of light through ports is different, and a glass slide is arranged on the light through ports;
the sensor is arranged in the air chamber box body and used for detecting the concentration of the gas to be detected in the air chamber box body.
2. The multirange optical gas chamber for calibration of a laser gas detector as claimed in claim 1, wherein a sealing cover is arranged on the top of the gas chamber box body, and a sealing strip is arranged between the gas chamber box body and the sealing cover.
3. The multirange optical gas chamber for calibrating the laser gas detector as claimed in claim 2, wherein a positioning hole is formed in the top of the gas chamber box, a positioning column is arranged at the bottom of the sealing cover, and the positioning hole is connected with the positioning column in a clamping manner.
4. A multirange optical gas cell for laser gas detector calibration as claimed in claim 2, wherein a handle is provided on top of said sealing cap.
5. The multirange optical gas cell for laser gas detector calibration as claimed in claim 1, wherein a fan is disposed on an inner wall of the gas cell housing.
6. A multirange optical gas cell for laser gas detector calibration as claimed in claim 5, wherein said fans are arranged in pairs, one on each of opposite inner walls of said gas cell housing.
7. A multi-range optical gas cell for calibration of a laser gas detector as claimed in claim 6 wherein each pair of said fans are offset.
8. The multirange optical gas chamber for calibrating the laser gas detector as claimed in claim 1, wherein an exhaust port is further formed in the gas chamber box body, and a negative pressure pump is installed at the exhaust port.
9. The multirange optical gas chamber for calibration of a laser gas detector as claimed in claim 1, wherein said sensor is a point type gas sensor, an aviation connector is arranged on the outer side of the chamber body, and said point type gas sensor is electrically connected with said aviation connector.
10. The multirange optical gas cell for laser gas detector calibration as claimed in claim 1, wherein said slides are high infrared transmission slides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933798.1U CN218098858U (en) | 2022-07-22 | 2022-07-22 | Multi-range optical gas chamber for laser gas detector calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933798.1U CN218098858U (en) | 2022-07-22 | 2022-07-22 | Multi-range optical gas chamber for laser gas detector calibration |
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| CN218098858U true CN218098858U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221933798.1U Active CN218098858U (en) | 2022-07-22 | 2022-07-22 | Multi-range optical gas chamber for laser gas detector calibration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963226A (en) * | 2022-12-30 | 2023-04-14 | 德尔格安全设备（中国）有限公司 | Gas integral concentration simulation device, and gas detector inspection method and system |
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2022
- 2022-07-22 CN CN202221933798.1U patent/CN218098858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963226A (en) * | 2022-12-30 | 2023-04-14 | 德尔格安全设备（中国）有限公司 | Gas integral concentration simulation device, and gas detector inspection method and system |
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