CN210221812U - Infrared gas detector - Google Patents
Infrared gas detector Download PDFInfo
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- CN210221812U CN210221812U CN201920908102.1U CN201920908102U CN210221812U CN 210221812 U CN210221812 U CN 210221812U CN 201920908102 U CN201920908102 U CN 201920908102U CN 210221812 U CN210221812 U CN 210221812U
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Abstract
The utility model relates to the technical field of infrared gas detection, in particular to an infrared gas detector, which comprises a frame, an infrared generator, a testing frame, a driving piece and an infrared receiver, wherein the infrared generator is arranged on the frame and used for emitting infrared rays; the test frame is provided with a plurality of through holes, at least one through hole is internally provided with a test piece, and the components of the test piece and the components of the calibration gas are the same; the driving piece is arranged on the rack and used for driving the test frame to rotate, and the distances between the center line of each through hole and the center line of the rotation of the test frame are equal; compared with the prior art, the infrared ray emitted by the infrared ray generator can penetrate through one of the through holes and be received by the infrared ray receiver, the gas is not required to be released into the atmosphere by adopting the solid-state test piece to replace the calibration gas, the test safety is ensured, corresponding protective equipment is not required to be equipped, and the detection concentration of the infrared gas detector can be controlled by controlling the thickness of the test piece.
Description
Technical Field
The utility model relates to an infrared gas detection technical field especially relates to an infrared gas detector.
Background
At present, in the trades such as petroleum, chemical industry, safety for production, all install gas leakage detecting instrument, among these detecting instrument, there is the part to use infrared gas detector, can survey alkane gas, alkene gas etc, infrared gas detector utilizes infrared principle to detect gas concentration, use infrared absorption type to be main, the core component is infrared sensor, infrared sensor utilizes different gas to infrared wave absorption degree difference, detect gas through measuring infrared absorption wavelength, poisoning resistance is good, the reaction is sensitive, gaseous with strong points, overlength life, environmental suitability is strong, and stable, reliable.
Before the infrared gas detector is installed on site and used, the infrared gas detector needs to be checked, whether an instrument can work normally needs to be verified, and whether a detection result of the instrument is accurate or not needs to be verified. After the infrared gas detector is put into use, calibration gas is discharged on an infrared detection optical path to check whether the discharged gas can be normally detected by an instrument, and the conventional method for regularly checking the infrared gas detector is also needed. However, the tested gas needs to be directly released into the air, and the calibration gas is mostly toxic or flammable and explosive gas, so that the environment is easily polluted; meanwhile, necessary protective equipment is also needed to ensure the safety of the checking personnel; moreover, the concentration of the calibration gas cannot be accurately controlled in an open environment where the calibration gas is mostly put in.
When the infrared gas detector is installed, an infrared light path emitted by a detector host needs to be ensured to be coaxial with a light path of the retroreflector, and the current common method is to use a telescope to aim for auxiliary centering during installation. The operation method comprises the steps of firstly installing the telescope on the detector main machine, then observing whether the center of the cross-shaped collimation in the telescope is overlapped with the center of the retroreflector through the telescope, if the center of the cross-shaped collimation in the telescope is overlapped with the center of the retroreflector, adjusting the direction of the detector main machine until the center of the cross-shaped collimation is not overlapped, and then detaching the telescope. However, the operation method has the disadvantages of complicated process, high difficulty and long time consumption; moreover, it is difficult to ensure that the infrared light paths emitted by the telescope and the detector main unit are coaxial for a common telescope, so that the centering result is prone to have deviation, if the infrared light paths emitted by the telescope and the detector main unit are coaxial, the structure of the part where the detector main unit is matched with the telescope needs high processing precision, and the telescope also needs to be specially customized, which results in high cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides an infrared gas detector to whether check infrared gas detector can be normal through discharge calibration gas on infrared detection light path among the solution prior art, cause the pollution to the environment easily, and need be equipped with necessary protective equipment and lead to the cost higher, and can't control the problem of calibration gas's concentration accurately.
The utility model provides an infrared gas detector, this infrared gas detector includes:
a frame;
the infrared generator is arranged on the rack and used for emitting infrared rays;
the test frame is provided with a plurality of through holes, a test piece is arranged in at least one through hole, and the components of the test piece are the same as those of the calibration gas;
the driving piece is mounted on the rack and used for driving the test frame to rotate, and the distance between the central line of each through hole and the rotating central line of the test frame is equal;
and the infrared receiver is used for receiving the infrared rays emitted by the infrared generator after the infrared rays pass through one of the through holes.
Preferably, the plurality of through holes are uniformly distributed on the test frame along the circumferential direction of the test frame.
Preferably, at least one of the through holes has no test piece mounted therein.
Preferably, the test frame is disc-shaped.
Preferably, the infrared gas detector further comprises a retroreflector, the retroreflector and the infrared generator are respectively located at two sides of the test frame, the infrared generator and the infrared receiver are located at the same side of the test frame, and the retroreflector is used for reflecting infrared rays emitted by the infrared generator to the infrared receiver.
Preferably, the infrared generator and the infrared receiver are respectively located at two sides of the testing frame.
Preferably, the distance between the center line of each through hole and the center line of the rotation of the test frame, the distance between the center line of the infrared generator and the center line of the rotation of the test frame, and the distance between the center line of the infrared receiver and the center line of the rotation of the test frame are equal.
Preferably, the number of the test strips is plural, and the composition of each of the test strips is different.
Preferably, the number of the test strips is plural, the plurality of test strips have the same composition, and the plurality of test strips have different thicknesses.
Preferably, the component of the test piece is one of polystyrene, polycarbonate, polypropylene, polyethylene-vinyl acetate copolymer and polyvinyl chloride.
The utility model has the advantages that:
the utility model provides an infrared gas detector, which comprises a frame, an infrared generator, a testing frame, a driving piece and an infrared receiver, wherein the infrared generator is arranged on the frame and used for emitting infrared rays; the test frame is provided with a plurality of through holes, at least one through hole is internally provided with a test piece, and the components of the test piece are the same as those of the calibration gas; the driving piece is arranged on the rack and used for driving the test frame to rotate, and the distance between the central line of each through hole and the rotating central line of the test frame is equal; the infrared ray emitted by the infrared ray generator can pass through one of the through holes and be received by the infrared ray receiver. In the embodiment, the calibration gas is replaced by the test strip with the same component as the calibration gas, and the test strip is in a solid state and has the same component as the calibration gas, so that the test strip has the characteristic absorption peak for infrared rays, can absorb part of the infrared rays and can be used for detecting an infrared gas detector; compared with the prior art, the gas is not required to be released into the atmosphere, the test safety is ensured, and corresponding protective equipment is not required, so that the cost can be effectively reduced; meanwhile, under the condition that the thickness of the test piece is constant, the quantity of infrared rays which can be absorbed by the test piece after passing through the test piece is also constant, so that the detection concentration of the infrared gas detector can be controlled by controlling the thickness of the test piece.
Drawings
Fig. 1 is a schematic structural diagram of an infrared gas detector in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an infrared gas detector in the embodiment of the present invention.
In the figure:
1. a frame; 2. an infrared detector probe; 3. a test frame; 31. a through hole; 4. a drive member; 5. testing the sheet; 6. a retroreflector; 7. a laser emitter.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 to 2, the present embodiment provides an infrared gas detector, which includes a frame 1, an infrared generator, a test frame 3, a driving member 4, and an infrared receiver. The infrared generator is arranged on the frame 1 and used for emitting infrared rays; the test frame 3 is provided with a plurality of through holes 31, at least one through hole 31 is internally provided with a test piece 5, and the components of the test piece 5 are the same as those of the calibration gas; the driving part 4 is arranged on the rack, the driving part 4 is used for driving the test frame 3 to rotate, and the distance between the central line of each through hole 31 and the rotating central line of the test frame 3 is equal; infrared rays emitted from the infrared ray generator can pass through one of the through holes 31 and be received by the infrared ray receiver. In the embodiment, the calibration gas is replaced by the test strip 5 with the same component as the calibration gas, and the test strip 5 is in a solid state and has the same component as the calibration gas, so that the test strip 5 also has a characteristic absorption peak for infrared rays, can absorb part of the infrared rays, and can be used for detecting an infrared gas detector. Compared with the prior art, the gas is not required to be released into the atmosphere, the safety of the test is ensured, corresponding protective equipment is not required, and the cost can be effectively reduced. Meanwhile, under the condition that the thickness of the test strip 5 is constant, the amount of infrared rays which can be absorbed by the test strip 5 after passing through the test strip 5 is also constant, so that the detection concentration of the infrared gas detector can be controlled by controlling the thickness of the test strip 5.
The driving member 4 in this embodiment is a motor or a swing cylinder (also referred to as a rotary cylinder).
Optionally, the test strip 5 is not mounted in the at least one through hole 31. Therefore, when the infrared gas detector needs to be checked, the infrared gas detector can be checked only by driving the testing frame 3 to rotate through the driving piece 4 and enabling the through hole 31 provided with the testing piece 5 to rotate to the infrared light path sent by the infrared generator. When the infrared gas detector is normally used, the through hole 31 without the test piece 5 is rotated to the infrared light path emitted by the infrared generator, so that the infrared light can directly pass through the through hole 31, the normal use of the infrared generator is not hindered, and the operation is simple and convenient.
Alternatively, the distance between the center line of each through hole 31 and the center line of rotation of the test frame 3, the distance between the center line of the infrared ray generator and the center line of rotation of the test frame 3, and the distance between the center line of the infrared ray receiver and the center line of rotation of the test frame 3 are equal.
Alternatively, a plurality of through holes 31 are uniformly distributed on the test frame 3 along the circumference of the test frame 3. So that the driving member 4 can rotate in the same direction for a fixed angle each time, and the sequential switching of the through holes 31 is realized.
Alternatively, the number of the test pieces 5 is plural, and the composition of each test piece 5 is different. Thus, when the corresponding calibration gas needs to be tested, the test piece 5 with the same component as the calibration gas can be selected to be positioned on the infrared ray path emitted by the infrared ray generator.
Alternatively, the number of the test pieces 5 is plural, and the plurality of test pieces 5 are the same in composition but different in thickness from one test piece 5 to another. The corresponding detection concentrations of the test pieces 5 with different thicknesses are different, so that the test pieces 5 with corresponding thicknesses can be selected to be positioned on an infrared light path emitted by the infrared generator corresponding to different concentrations of the same calibration gas.
It is understood that it is also possible to make a part of the plurality of test pieces 5 the same in composition but different in composition from each other, and to make the thickness of the test pieces 5 different from each other for the same composition.
In this embodiment, the component of the test strip 5 may be one of polystyrene, polycarbonate, polypropylene, polyethylene-vinyl acetate copolymer, and polyvinyl chloride.
In this embodiment, the infrared gas detector further includes a retroreflector 6, the retroreflector 6 and the infrared generator are respectively located on two sides of the testing frame 3, the infrared generator and the infrared receiver are located on the same side of the testing frame 3, in this embodiment, the infrared generator and the infrared receiver are integrally arranged, and the infrared generator and the infrared receiver constitute the infrared detector probe 2. The retroreflector 6 is used to reflect the infrared rays emitted from the infrared ray generator to the infrared ray receiver. The retroreflector 6 is a mirror, preferably not absorbing infrared rays, such as a mirror of sapphire material. In other embodiments, the infrared generator and the infrared receiver may be respectively located at two sides of the testing frame 3, and at this time, the infrared generator and the infrared receiver are separately arranged.
Optionally, the infrared gas detector further comprises a laser emitter 7, the laser emitter 7 is mounted on the frame 1, the laser emitter 7 is used for emitting laser light, the laser light is parallel to the infrared light emitted by the infrared light generator, and the distance between the laser light and the infrared light is equal to the radius of the retroreflector 6. It will be appreciated that the distance of the laser from the infrared is less than the radius of the test strip 5 and that the test strip 5 is transparent so that the laser can be directed through the test strip 5 directly towards the retroreflector 6. And the spot formed by the laser light irradiated on the retroreflector 6 has a certain size and the laser light is visible light, so that when the axis of the retroreflector 6 coincides with the optical path of the infrared light emitted from the infrared reflector, the laser light can form a partial spot on the end surface of the retroreflector 6, whereby the retroreflector 6 can be quickly mounted in place.
The position of the retroreflector 6 is adjusted by quickly and roughly adjusting the position of the retroreflector 6 to allow both infrared rays and laser light to irradiate the retroreflector 6; then, the position of the retroreflector 6 is accurately adjusted at a slow speed, the retroreflector 6 is moved so that the laser spot moves to the edge of the end face of the retroreflector 6, and then the retroreflector 6 is slightly rotated with the line connecting the laser spot and the infrared spot as the center line so that the laser receiver can receive the infrared rays.
Optionally, the retroreflector 6 includes a circular frame and a lens mounted on the frame, the lens is used for reflecting the infrared rays emitted by the infrared ray generator to the infrared ray receiver, and the distance between the laser and the infrared rays is equal to the radius of the periphery of the frame.
Optionally, the infrared gas detector further comprises an adjustment device (not shown in the drawings) for adjusting the height of the laser emitter 7. The infrared gas detector can be adapted to retroreflectors 6 of different sizes by adjusting the height of the laser emitter 7 by the adjusting device. It can be understood that, when the position of the laser emitter 7 is adjusted, the distance between the laser emitted by the laser emitter 7 and the infrared emitted by the infrared generator is smaller than the radius of the test piece 5.
The adjusting device comprises an electric push rod arranged on the rack 1 and a nut arranged on a lead screw on the electric push rod, the nut is in sliding fit with the rack 1, and the laser emitter 7 is arranged on the nut. Preferably, adjusting device still includes the guide post, and guide post and lead screw parallel arrangement, guide post rigid coupling in frame 1 and slip and wear to locate the nut. The stability of the moving direction of the laser emitter 7 can be ensured by arranging the guide post. In other embodiments, the electric push rod can be replaced by an air cylinder or a hydraulic oil cylinder, and accordingly, the laser emitter 7 is directly arranged on an output rod of the air cylinder or the hydraulic oil cylinder without a nut. In another embodiment, the adjustment device comprises a driving motor, a pinion gear mounted on an output shaft of the driving motor, and a rack engaged with the pinion gear, the rack being slidably engaged with the frame 1, and the laser emitter 7 being mounted on the rack.
The number of the laser emitters 7 is two, the two laser emitters 7 are arranged at intervals, the two laser emitters 7 are arranged in parallel, and the distance between the two laser emitters 7 and the infrared generator is equal. By arranging the two laser transmitters 7, when the position of the retroreflector 6 is adjusted, the light spots of the two laser transmitters 7 can be determined as long as the light spots are positioned at the edge of the end face of the retroreflector 6, and at the moment, the retroreflector 6 is coaxial with an infrared pipeline emitted by the infrared generator. The adjustment efficiency can be further improved.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An infrared gas detector, comprising:
a frame (1);
the infrared generator is arranged on the rack (1) and is used for emitting infrared rays;
the gas calibration device comprises a test frame (3), wherein a plurality of through holes (31) are formed in the test frame (3), a test piece (5) is installed in at least one through hole (31), and the components of the test piece (5) are the same as those of calibration gas;
the driving piece (4) is mounted on the rack (1), the driving piece (4) is used for driving the test frame (3) to rotate, and the distances between the central line of each through hole (31) and the rotating central line of the test frame (3) are equal;
an infrared receiver, through one of which the infrared emitted by the infrared generator can pass through and be received by the infrared receiver.
2. The infrared gas detector according to claim 1, characterized in that a plurality of said through holes (31) are evenly distributed on said test frame (3) along the circumference of said test frame (3).
3. The infrared gas detector as claimed in claim 1, characterized in that no test strip (5) is mounted in at least one of said through holes (31).
4. The infrared gas detector as claimed in claim 1, characterized in that the test frame (3) is disc-shaped.
5. The infrared gas detector according to claim 3, characterized in that it further comprises a retroreflector (6), said retroreflector (6) and said infrared generator being respectively located on both sides of said test frame (3), said infrared generator and said infrared receiver being located on the same side of said test frame (3), said retroreflector (6) being adapted to reflect infrared rays emitted by said infrared generator to said infrared receiver.
6. The infrared gas detector as claimed in claim 1, characterized in that said infrared generator and said infrared receiver are located on either side of said test frame (3).
7. The infrared gas detector as claimed in any of claims 1 to 6, characterized in that the distance between the center line of each of said through holes (31) and the center line of rotation of said test frame (3), the distance between the center line of said infrared generator and the center line of rotation of said test frame (3), and the distance between the center line of said infrared receiver and the center line of rotation of said test frame (3) are equal.
8. The infrared gas detector as set forth in claim 1, characterized in that the number of the test strips (5) is plural, and the composition of each of the test strips (5) is different.
9. The infrared gas detector as set forth in claim 1, wherein the number of the test strips (5) is plural, the composition of the plurality of test strips (5) is the same, and the thickness of the plurality of test strips (5) is different.
10. The infrared gas detector as set forth in claim 1, wherein the composition of the test strip (5) is one of polystyrene, polycarbonate, polypropylene, polyethylene-vinyl acetate copolymer, and polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920908102.1U CN210221812U (en) | 2019-06-17 | 2019-06-17 | Infrared gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920908102.1U CN210221812U (en) | 2019-06-17 | 2019-06-17 | Infrared gas detector |
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| Publication Number | Publication Date |
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| CN210221812U true CN210221812U (en) | 2020-03-31 |
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| CN201920908102.1U Active CN210221812U (en) | 2019-06-17 | 2019-06-17 | Infrared gas detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146461A (en) * | 2019-06-17 | 2019-08-20 | 深圳市英宝硕科技有限公司 | A kind of infrared gas detector |
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2019
- 2019-06-17 CN CN201920908102.1U patent/CN210221812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146461A (en) * | 2019-06-17 | 2019-08-20 | 深圳市英宝硕科技有限公司 | A kind of infrared gas detector |
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