Portable laser gas detector

Abstract

The utility model discloses a portable laser gas detector, which belongs to the technical field of gas detection instruments, and comprises a handle, the top of the handle is fixedly connected with a detection head shell, the middle upper part of the outer wall of the detection head shell is fixedly connected with a laser detection head, and the back of the detection head shell is provided with a display screen. A collecting assembly is arranged in the detection head shell and comprises an air extracting pump, the air extracting pump is fixedly connected to the interior of the detection head shell, the air extracting pump is specifically a micro diaphragm pump, and an air inlet pipe and an air outlet pipe on the outer wall of the air extracting pump are communicated with a second connecting pipe and a first connecting pipe respectively; according to the utility model, through two active and passive detection modes of the acquisition assembly, the problems that when gas is detected by pure laser, dust, smoke or other particulate matters can scatter and absorb the laser, the intensity of the laser is reduced, the propagation direction of the laser is changed, and the accurate judgment on the gas concentration is influenced are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas detection instrument technical field especially relates to a portable laser gas detector. BACKGROUND

[0002] The laser gas detector is a kind of instrument using laser and gas molecule interaction to detect gas composition and concentration.The core principle is based on the absorption characteristics of gas molecules to specific wavelength laser.Different gas molecules have its unique absorption spectrum in specific wavelength range, when laser passes through the medium containing target gas, gas molecules will absorb the laser energy of specific wavelength, by measuring the light intensity change before and after laser passing through gas, the concentration of gas can be calculated.

[0003] The utility model discloses a kind of anti-explosion fog type laser gas detectors of announcement No.CN218036372U, including detector handle, laser detection head and display screen, the detector handle top is fixedly connected with laser detection head, the laser detection head top is fixedly connected with display screen, display screen is used to show detection data, the detector handle outer side is fixedly connected with sliding table, and sliding table inside is slidably connected with support mechanism, the side of support mechanism face towards detector handle is equipped with second magnet, the second magnet is embedded in detector handle inside.

[0004] The above laser gas detector detects gas by laser detection head in actual use process, but in actual use environment, laser detection depends on specific light path, if dust, smoke or other particulate matter exists in light path, scattering and absorption to laser will be generated, reduce the intensity of laser and change its propagation direction, this can cause the signal received by detector to be weak or produce deviation, further influence accurate judgment to gas concentration, for this, we propose a kind of portable laser gas detector. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of portable laser gas detector, overcome the deficiencies of prior art, aim at solving the problems in background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A portable laser gas detector, including handle, the top of handle is connected with detection head casing, the outer wall of detection head casing upper portion is connected with laser detection head, the back surface of detection head casing is installed with display screen, the inside of detection head casing is provided with collection component, collection component includes air pump, air pump is fixedly connected in the inside of detection head casing, the air pump is specifically micro diaphragm pump, the gas inlet pipe and the air outlet pipe of air pump outer wall are connected with connecting pipe no.

[0007] The utility model discloses a kind of portable laser gas detector, it has the characteristics of small and portable, detection head shell is equipped with acquisition component, start air pump, air pump is extracted into the protective shell by the gas of detection, it is detected by the sensor in protective shell, under the action of air pump, first contact waterproof gas-permeable membrane, it allows gas molecule to diffuse freely into circular ring one, simultaneously prevent dust, water drop and other large particle material into, the gas in circular ring one is entered into circular ring two by micro hole, the mixed component in circular ring two changes the path of gas, so that gas residence time becomes long, promote the mixing of detection gas, after mixing, gas enters the inside of circular ring three, the aperture of the middle of circular ring three is tapered, because tapered channel path gradually becomes small, can make mixed gas before entering sensor, flow rate gradually stabilizes, pressure is uniform, gas is detected by the sensor in protective shell by air outlet pipe into the protective shell, after detection, gas is discharged by the nanometer small hole of protective shell one side outer wall, when detection environment needs long-term detection, only need to place detection instrument in detection environment, rely on natural diffusion movement of gas molecule, detect gas, because it does not interfere with the natural flow and distribution of indoor air, can long time, stably monitor whether the concentration of detected gas is overproof.

[0008] As a preferred technical scheme of the utility model, the mixed component includes baffle one and baffle two, the baffle one and baffle two are respectively fixedly connected in the inner wall of circular ring two in staggered mode:

[0009] By installing baffle one and baffle two in staggered mode in the inside of circular ring two, the path of gas flow is changed, to increase the residence time of gas molecule in diffusion process, improve diffusion mixing efficiency, avoid that gas directly passes through linear flow and leads to uneven mixing, the concentration in gas is too high or too low.

[0010] The utility model has the advantages that: by the two kinds of active and passive detection modes of acquisition component, effectively solve that when simply laser detects gas, dust, smoke or other particulate matter can scatter and absorb laser, reduce the intensity of laser and change its propagation direction, and then affect the accurate judgment of gas concentration.

[0011] The utility model has the advantages that: acquisition component and laser detection are used in cooperation, active air pumping can actively pump gas to detection area, by controlling air pumping speed and time, the enrichment of low-concentration gas can be realized, for example, in a large space, the gas concentration is very low, by long-time active air pumping, enough target gas can be collected to detection area, cooperate laser detection to detect weaker absorption signal, so as to reduce detection limit, improve the detection ability of low-concentration gas, reduce the error that may appear when detecting gas in single mode, and the gas concentration can be determined more reliably.

[0012] The utility model discloses a baffle one and baffle two are installed in the inside of circular ring no. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the three -dimensional structure schematic drawing of the utility model;

[0014] Figure 2 It is the detection head casing three -dimensional schematic drawing of the utility model;

[0015] Figure 3 It is the inside collection subassembly structure schematic drawing of the detection head casing of the utility model;

[0016] Figure 4 It is the collection subassembly enlarged structure schematic drawing of the utility model;

[0017] Figure 5 It is the air intake subassembly split structure schematic drawing of the utility model;

[0018] Figure 6 It is the air intake subassembly partial structure schematic drawing of the utility model;

[0019] Figure 7 It is the inside structure schematic drawing of circular ring no.

[0020] Figure 8 It is the circular ring three middle hole diameter shape schematic drawing of the utility model;

[0021] Figure 9 It is the mixing subassembly structure schematic drawing of the utility model.

[0022] In the drawing: 1, handle, 2, detection head casing, 3, collection subassembly, 301, air pump, 302, protective shell, 303, connecting mouth, 304, air outlet pipe, 305, connecting pipe no. 1, 306, air inlet pipe, 307, connecting pipe no. 2, 308, connecting pipe no. 3, 309, check valve, 310, regulating valve, 311, waterproof air-permeable membrane, 312, circular ring no. 1, 313, micro air hole, 314, circular ring no. 2, 316, circular ring no. 3, 317, battery, 318, air cock, 4, mixing subassembly, 401, baffle no. 1, 402, baffle no. 2, 5, laser detection head. DETAILED DESCRIPTION

[0023] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] Embodiment one

[0025] Please refer to Figures 1 to 8 A portable laser gas detector, including handle 1, the top of handle 1 is fixedly connected with detection head shell 2, the outer wall middle upper portion of detection head shell 2 is fixedly connected with laser detection head 5, the back of detection head shell 2 is installed with display screen, the inside of detection head shell 2 is provided with acquisition assembly 3, acquisition assembly 3 includes air pump 301, air pump 301 is fixedly connected in the inside of detection head shell 2, air pump 301 is specifically micro diaphragm pump, the air inlet pipe 306 and the air outlet pipe 304 of air pump 301 outer wall are respectively communicated with connecting pipe two 307 and connecting pipe one 305, the outer wall of connecting pipe two 307 is communicated with connecting pipe three 308, the outer wall of connecting pipe two 307 and connecting pipe three 308 is respectively communicated with check valve 309 and regulating valve 310, the other end of connecting pipe one 305 is communicated with processing assembly, the inside of detection head shell 2 is installed with battery 317, battery 317 is electrically connected with air pump 301, the outer wall middle lower portion of detection head shell 2 is provided with air inlet assembly, processing assembly includes protective shell 302, protective shell 302 is fixedly connected in the inside of detection head shell 2, the outer wall of protective shell 302 is communicated with connecting mouth 303, the end of connecting mouth 303 is communicated with the end of connecting pipe one 305, air inlet assembly includes air nozzle 318, air nozzle 318 is arranged in the outer wall middle lower portion of detection head shell 2, one end of air nozzle 318 penetrates detection head shell 2 and is communicated with connecting pipe two 307, the other end of air nozzle 318 is communicated with circular ring three 316, the aperture of the middle portion of circular ring three 316 is tapered, the outer wall of circular ring three 316 is communicated with circular ring two 314, the outer wall of circular ring two 314 is communicated with circular ring one 312, the outer wall of circular ring one 312 is fixedly connected with waterproof air-permeable membrane 311 on the other side, a plurality of micro air holes 313 are formed in the inside of circular ring one 312, mixing assembly 4 is arranged in the inside of circular ring two 314.

[0026] The utility model discloses a portable laser gas detector, it has the characteristics of small and portable, and the detection head shell 2 is installed with the collection component 3, starts the air pump 301, and the air pump 301 draws the gas of detection into the protective shell 302, and the sensor in the protective shell 302 detects, and the gas of detection is under the action of air pump 301, first contacts waterproof air-permeable membrane 311, and it allows gas molecule to diffuse freely into the circular ring one 312, prevents dust, water drop and so on big granular material from entering simultaneously, and the gas in the circular ring one 312 passes through the micro hole 313 and enters the circular ring two 314, and the mixed component 4 in the circular ring two 314 changes the path of gas, so that the gas residence time becomes long, promotes the mixing of detection gas, and the mixed gas enters the inside of the circular ring three 316, and the aperture of the circular ring three 316 middle part is conical, because the conical channel path gradually becomes small, can make the mixed gas before entering the sensor, and the flow rate gradually stabilizes, and the pressure is uniform, and the gas enters the air pump 301 and is detected by the sensor in the protective shell 302 through the air pipe 304, and the gas after detection is discharged through the nanometer small hole of the outer wall of the protective shell 302 side, when the detection environment needs long -term detection, only needs to place the detection instrument in the detection environment, relies on the natural diffusion movement of gas molecule, and detects the gas, because it does not interfere with the natural flow and distribution of indoor air, can long -time, stablely monitor whether the detected gas concentration is overproof.

[0027] Please refer to Figure 7 and Figure 9 In the embodiment, the mixed component 4 includes baffle one 401 and baffle two 402, and the baffle one 401 and the baffle two 402 are fixedly connected in the inner wall of the circular ring two 314 in alternation.

[0028] By alternately installing the baffle one 401 and the baffle two 402 in the inside of the circular ring two 314, the path of gas flow is changed, so that the residence time of gas molecules in the diffusion process is increased, the diffusion mixing efficiency is improved, the gas is prevented from directly flowing through a straight line to cause uneven mixing, and the concentration of the gas is prevented from being too high or too low.

[0029] Working principle: start the air pump 301, the air pump 301 is detected into the protective shell 302 by the sensor in the protective shell 302, the detected gas is first contacted with the waterproof gas permeable membrane 311 under the action of the air pump 301, which allows gas molecules to diffuse freely into the circular ring one 312, while preventing dust, water droplets and other large particles from entering, the gas in the circular ring one 312 enters the circular ring two 314 through the micro-pore 313, the mixed assembly 4 in the circular ring two 314 changes the path of the gas, the mixed assembly 4 is baffle one 401 and baffle two 402, which are installed in the interior of the circular ring two 314 by staggering, so that the gas flow path changes and the residence time becomes longer, thereby promoting the mixing of the detected gas, the mixed gas enters the interior of the circular ring three 316, the aperture in the middle of the circular ring three 316 is tapered, because the tapered channel path gradually becomes smaller, it can make the mixed gas gradually stable in flow rate and uniform in pressure before entering the sensor, the gas enters the air pump 301 and enters the sensor in the protective shell 302 through the gas outlet pipe 304, the detected gas is discharged through a plurality of nanometer small holes on the side wall of the protective shell 302, when the detection environment needs to be detected for a long time, only the detection instrument needs to be placed in the detection environment, and the gas is detected by relying on the natural diffusion motion of gas molecules, because it does not interfere with the natural flow and distribution of indoor air, it can long-term, stable monitor whether the detected gas concentration exceeds the standard.

[0030] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A portable laser gas detector, comprising a handle (1), characterized in that, The top of the handle (1) is fixedly connected to the detection head housing (2), and the inside of the detection head housing (2) is provided with a collection component (3); The acquisition component (3) includes an air pump (301), which is fixedly connected inside the detection head housing (2). The air inlet pipe (306) and the air outlet pipe (304) on the outer wall of the air pump (301) are respectively connected to a connecting pipe two (307) and a connecting pipe one (305). The outer wall of the connecting pipe two (307) is connected to a connecting pipe three (308). The outer walls of the connecting pipe two (307) and the connecting pipe three (308) are respectively connected to a one-way valve (309) and a regulating valve (310). The other end of the connecting pipe one (305) is connected to a processing component. A battery (317) is installed inside the detection head housing (2). The battery (317) is electrically connected to the air pump (301). An air inlet component is provided in the lower middle part of the outer wall of the detection head housing (2).

2. The portable laser gas detector according to claim 1, characterized in that, The processing component includes a protective shell (302), which is fixedly connected to the inside of the detection head housing (2). The outer wall of the protective shell (302) is connected to a connecting nozzle (303), and the end of the connecting nozzle (303) is connected to the end of the connecting tube (305).

3. A portable laser gas detector according to claim 1, characterized in that, The air intake assembly includes an air nozzle (318), which is located in the lower part of the outer wall of the detection head housing (2). One end of the air nozzle (318) penetrates the detection head housing (2) and is connected to the connecting pipe (307). The other end of the air nozzle (318) is connected to a circular ring (316). The diameter of the hole in the middle of the circular ring (316) is conical. The outer wall of the circular ring (316) is connected to a circular ring (314). The outer wall of the circular ring (314) is connected to a circular ring (312). A waterproof and breathable membrane (311) is fixedly connected to the other side of the outer wall of the circular ring (312). The interior of the circular ring (312) has several micro-holes (313). The interior of the circular ring (314) is provided with a mixing component (4).

4. A portable laser gas detector according to claim 3, characterized in that, The mixing component (4) includes a first baffle (401) and a second baffle (402), which are respectively fixedly connected to the inner wall of the second circular ring (314) in an alternating manner.

5. A portable laser gas detector according to claim 1, characterized in that, A laser detection head (5) is fixedly connected to the upper part of the outer wall of the detection head housing (2).

6. A portable laser gas detector according to claim 1, characterized in that, A display screen is mounted on the back of the detection head housing (2).

7. A portable laser gas detector according to claim 1, characterized in that, The air pump (301) is specifically a miniature diaphragm pump.

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