Portable gas detector with pumping and natural diffusion functions

Abstract

The utility model provides a portable gas detector for both pumping and natural diffusion, which comprises a surface shell and a bottom shell, the upper part of the surface shell is provided with a gas sensor PCBA (Printed Circuit Board Assembly), the front end of the gas sensor PCBA is provided with a gas sensor, a gas chamber cover and a first waterproof breathable film are arranged between the gas sensor and the surface shell, and the upper part of the surface shell is provided with a vent hole matched with the breathable film. A liquid crystal display PCBA, a battery and a liquid crystal display are arranged on the lower portion of the rear side of the face shell, an air inlet seat is fixedly arranged on the upper portion of the rear side of the bottom shell, a microfiltration membrane, a steel mesh and a second waterproof breathable membrane are arranged at the communication position of the air inlet seat and the bottom shell, and an air pump is fixedly arranged in the middle of the rear side of the face shell and communicated with the air inlet seat through an air inlet pipe. The air pump communicates with the air chamber cover through an air outlet pipe; the utility model has two working modes of pumping and diffusion, when the pumping function is needed, the air pump is started to collect air for detection, and when the air pump fails or an air path is blocked, the air pump is closed, and the air pump works in the diffusion mode through the air holes of the surface shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas detector technical field especially relates to a portable gas detector with pump suction and natural diffusion. BACKGROUND

[0002] The portable gas detector is high in sensitivity, convenient to hold and widely used in natural gas, petroleum, chemical industry and other industries to detect natural gas and toxic gas production and use site.

[0003] The portable gas detector has pump suction type and diffusion type, the common pump suction type portable gas detector cannot work when the gas pump breaks down or the gas path is blocked in emergency, which influences on-site detection of the staff and may cause serious production safety accidents, some pump suction type detectors can switch to diffusion working mode when the gas pump breaks down, but the measurement accuracy is relatively low. SUMMARY

[0004] The utility model discloses a portable gas detector with pump suction and natural diffusion, which can provide pump suction and diffusion working modes and is more versatile.

[0005] To achieve the above object, the technical scheme of the utility model is as follows:

[0006] A portable gas detector with pump suction and natural diffusion, characterized by comprising front and rear sequentially connected face shell and bottom shell, the upper part of the rear side of the face shell is fixedly provided with a gas sensor PCBA, the front end of the gas sensor PCBA is provided with a gas sensor, the gas sensor PCBA controls the gas sensor, the gas sensor and the face shell are sequentially fixedly provided with a gas chamber cover and a first waterproof air-permeable film from back to front, the upper part of the face shell is provided with an air-permeable hole matched with the first waterproof air-permeable film, the lower part of the rear side of the face shell is sequentially fixedly provided with a liquid crystal display PCBA, a battery and a liquid crystal display from back to front, the liquid crystal display PCBA controls the liquid crystal display, the liquid crystal display is embedded in the mounting hole in the lower part of the face shell, the gas sensor PCBA is in communication connection with the liquid crystal display PCBA, the battery supplies power for the liquid crystal display PCBA and the gas sensor PCBA, the lower end of the bottom shell is provided with a USB interface, the USB interface is in communication connection with the liquid crystal display PCBA, the upper part of the rear side of the bottom shell is fixedly provided with an air inlet seat, the upper end of the air inlet seat is provided with a probe rod, the air inlet seat and the bottom shell are sequentially fixedly provided with a microporous filter membrane, a steel mesh and a second waterproof air-permeable film from back to front at the communication position, the middle part of the rear side of the face shell is fixedly provided with a gas pump, the gas pump and the air inlet seat are communicated through an air inlet pipe, and the gas pump and the gas chamber cover are communicated through an air outlet pipe.

[0007] Further, the rear side of the liquid crystal display PCBA is provided with a liquid crystal display bracket, the liquid crystal display bracket is fixedly connected with the bottom shell, and the liquid crystal display bracket and the liquid crystal display PCBA are connected through buckling.

[0008] Further, the battery is fixed in the liquid crystal display bracket.

[0009] Further, the gas chamber cover and the first waterproof air permeable film are provided with a gas sensor sealing gasket.

[0010] Further, the air pump is fixed in the air pump support, and the air pump support is fixedly connected with the middle part of the rear side of the surface shell.

[0011] Further, the air inlet seat sealing gasket is arranged between the steel mesh and the second waterproof air permeable film.

[0012] Further, the middle part of the rear side of the bottom shell is fixedly provided with a back clamp.

[0013] Further, the lower end of the USB interface is filled with a USB plug.

[0014] The utility model has two working modes of pumping and diffusion, when pumping function is needed, open air pump to collect gas detection, when air pump is out of order or air passage is blocked, close air pump, work in diffusion mode through surface shell air hole, two working modes of the utility model can be calibrated with standard gas, accurately detect the gas to be detected, realize two functions of a detector, can cope with complex working conditions on site, and convenience for on-site workers. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a disassembled structure schematic view of the utility model;

[0016] Figure 2 It is a bottom shell structure schematic view of the utility model;

[0017] Figure 3 It is a surface shell structure schematic view of the utility model.

[0018] Reference signs:

[0019] 1 surface shell, 2 waterproof air permeable film, 3 gas chamber cover sealing gasket, 4 gas chamber cover, 5 cross slot disc head self-tapping screw,

[0020] 6 gas sensor sealing gasket, 7 gas sensor PCBA, 8 hexagonal nut, 9 bottom shell, 10 waterproof air permeable film,

[0021] 11 air inlet seat sealing gasket, 12 steel mesh, 13 microporous filter membrane, 14 probe rod, 15 air inlet seat,

[0022] 16. Phillips head pan head screws; 17. Back clip; 18. Product label; 19. Nameplate; 20. Warning label.

[0023] 21. Hex socket head cap screws, 22. USB plugs, 23. LCD monitor PCBA, 24. Battery.

[0024] 25 LCD monitor bracket, 26 air pump, 27 LCD monitor, 28 buzzer, 29 vent. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] This utility model discloses a portable gas detector that combines pump suction and natural diffusion, such as Figure 1 As shown, it includes a front shell 1 and a bottom shell 9 connected in sequence from front to back, and the front shell 1 and the bottom shell 9 are fixedly connected by hexagonal pan head screws 21.

[0027] A gas sensor PCBA 7 is fixedly installed on the upper rear side of the faceplate 1. A gas sensor 6 is installed at the front end of the gas sensor PCBA 7. The gas sensor PCBA 7 controls the gas sensor 6.

[0028] Gas sensor 6 and housing 1 are fixedly connected from back to front with gas chamber cover 4 and first waterproof and breathable membrane 2. Gas sensor PCBA 7 and gas chamber cover 4 are fixedly connected to housing 1 by cross-slot pan head self-tapping screws 5, and the cross-slot pan head self-tapping screws 5 are screwed into hexagonal nuts 8.

[0029] like Figure 3 As shown, the upper part of the faceplate 1 is provided with a vent 29 that cooperates with the first waterproof and breathable membrane 2. A gas sensor sealing gasket 3 is provided between the air chamber cover 4 and the first waterproof and breathable membrane 2. The gas sensor sealing gasket 3 is a hollow ring-shaped structure that cooperates with the outer contour of the air chamber cover 4.

[0030] like Figure 1 As shown, from back to front, the lower part of the rear side of the faceplate 1 is fixed with a liquid crystal display PCBA 23, a battery 24 and a liquid crystal display 27. The liquid crystal display 27 is an LCD liquid crystal display. The liquid crystal display 27 is embedded in the mounting hole at the bottom of the faceplate 1. The liquid crystal display PCBA 23 controls the liquid crystal display 27. The gas sensor PCBA 7 is communicatively connected to the liquid crystal display PCBA 23. The battery 24 supplies power to the liquid crystal display PCBA 23 and the gas sensor PCBA 7.

[0031] The LCD PCBA 23 has an LCD display bracket 25 on its rear side. The LCD display bracket 25 is fixedly connected to the bottom shell 9. The LCD display bracket 25 and the LCD PCBA 23 are connected by a snap-fit. The battery 24 is fixed inside the LCD display bracket 25.

[0032] like Figure 1 As shown, a USB interface is provided at the lower end of the bottom shell 9, and a USB plug 22 is filled at the lower end of the USB interface. The USB interface is connected to the LCD PCBA 23 for communication. An air inlet seat 15 is fixedly connected to the upper part of the rear side of the bottom shell 9 by a cross-slot pan head screw 16. A probe 14 is provided at the upper end of the air inlet seat 15. From back to front, a microporous filter membrane 13, a steel mesh 12, an air inlet seat sealing gasket 11, and a second waterproof and breathable membrane 10 are fixedly provided at the connection between the air inlet seat 15 and the bottom shell 9. The air inlet seat sealing gasket 11 is a hollow ring structure that matches the outer contour of the microporous filter membrane 13 and the steel mesh 12.

[0033] An air pump 26 is fixedly installed in the middle of the rear side of the faceplate 1. The air pump 26 is fixed in the air pump bracket. The air pump bracket is fixedly connected to the middle of the rear side of the faceplate 1. The air pump 26 and the air inlet seat 15 are connected through an air inlet pipe. The air pump 26 and the air chamber cover 4 are connected through an air outlet pipe.

[0034] When the portable gas detector of this utility model needs to activate the pump suction function, the air pump 26 is turned on by the switch at the bottom of the face shell 1. The external gas passes through the probe 14-inlet seat 15-inlet pipe-air pump 26-gas sensor PCBA 7-gas sensor PCBA 7-gas sensor 6 in sequence to complete gas collection and detection.

[0035] like Figure 2 As shown, a back clip 17 is fixedly provided in the middle of the rear side of the bottom shell 9. The portable gas detector of this utility model can be fixed to various hooks and hanging rods through the back clip 17, so that the on-site staff do not need to hold it all the time.

[0036] The rear side of the bottom shell 9 is also provided with a product label 18, a nameplate 19 and a warning label 20 from top to bottom.

[0037] like Figure 3 As shown, a buzzer 28 is provided in the middle of the front side of the faceplate 1. The buzzer 28 is electrically connected to the gas sensor PCBA 7. When the gas sensor 6 completes gas detection, the buzzer 28 sounds.

[0038] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A portable gas detector that utilizes both pumping and natural diffusion, characterized in that, The application relates to a gas sensor, which comprises a front-to-back connected face shell (1) and bottom shell (9), a gas sensor PCBA (7) is fixedly arranged at the upper portion of the rear side of the face shell (1), a gas sensor (6) is arranged at the front end of the gas sensor PCBA (7), the gas sensor (6) is controlled by the gas sensor PCBA (7), a gas chamber cover (4) and a first waterproof air permeable film (2) are fixedly arranged between the gas sensor (6) and the face shell (1) from back to front, a gas permeable hole (29) matched with the first waterproof air permeable film (2) is arranged at the upper portion of the face shell (1), a liquid crystal display PCBA (23), a battery (24) and a liquid crystal display (27) are fixedly arranged at the lower portion of the rear side of the face shell (1) from back to front, the liquid crystal display (27) is embedded in a mounting hole in the lower portion of the face shell (1), the gas sensor PCBA (7) is in communication connection with the liquid crystal display PCBA (23), the battery (24) supplies power for the liquid crystal display PCBA (23) and the gas sensor PCBA (7), a USB interface is arranged at the lower end of the bottom shell (9), the USB interface is in communication connection with the liquid crystal display PCBA (23), an air inlet seat (15) is fixedly arranged at the upper portion of the rear side of the bottom shell (9), a probe rod (14) is arranged at the upper end of the air inlet seat (15), a microporous filter membrane (13), a steel mesh (12) and a second waterproof air permeable film (10) are fixedly arranged in sequence at the communication position between the air inlet seat (15) and the bottom shell (9), a gas pump (26) is fixedly arranged at the middle portion of the rear side of the face shell (1), the gas pump (26) and the air inlet seat (15) are communicated through an air inlet pipe, and the gas pump (26) and the gas chamber cover (4) are communicated through an air outlet pipe.

2. The portable gas detector for combined pumping and natural diffusion according to claim 1, characterized in that A liquid crystal display bracket (25) is arranged at the rear side of the liquid crystal display PCBA (23), the liquid crystal display bracket (25) is fixedly connected with the bottom shell (9), and the liquid crystal display bracket (25) and the liquid crystal display PCBA (23) are connected through buckling.

3. The portable gas detector for use in both pumping and natural diffusion according to claim 2, characterized in that, The battery (24) is fixed in the liquid crystal display bracket (25).

4. The portable gas detector for use in both pumping and natural diffusion according to claim 1, wherein A gas sensor sealing gasket (3) is arranged between the gas chamber cover (4) and the first waterproof air permeable film (2).

5. The portable gas detector for use in both pumping and natural diffusion according to claim 1, wherein The gas pump (26) is fixed in a gas pump support, and the gas pump support is fixedly connected with the middle portion of the rear side of the face shell (1).

6. The portable gas detector for use in both pumping and natural diffusion according to claim 1, wherein An air inlet seat sealing gasket (11) is arranged between the steel mesh (12) and the second waterproof air permeable film (10).

7. The portable gas detector for use in both pumping and natural diffusion according to claim 1, characterized in that, A back clamp (17) is fixedly arranged at the middle portion of the rear side of the bottom shell (9).

8. The portable gas detector for use in both pumping and natural diffusion according to claim 1, characterized in that, A USB plug (22) is filled at the lower end of the USB interface.

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