Gas sampling device for environment detection

Abstract

The utility model provides a gas sampling device for environment detection, which comprises a machine body and a plurality of sampling pipes, a plurality of inner cavities are arranged in the machine body at equal intervals, the sampling pipes correspond to the inner cavities, the sampling pipes are fixed on the outer surface of the machine body, one end of each sampling pipe far away from the machine body is communicated with a breather pipe, and the breather pipe is communicated with the machine body. One end, far away from the sampling pipe, of the ventilation pipe is in threaded connection with a sealing plug cap, a piston is arranged in the sampling pipe, a pulling plate is fixed on one side of the piston, the end part of the pulling plate penetrates into the inner cavity, and one end, close to the inner cavity, of the pulling plate is provided with a through hole. Compared with the prior art, the sampling device disclosed by the utility model has the following beneficial effects that the sampling device can be used for sampling at a plurality of sampling points in a sampling area or sampling in a plurality of sampling areas through the plurality of sampling pipes on the machine body, and multiple times of sampling do not influence one another, so that the practicability of the sampling device is improved.

Description

Technical Field

[0001] The utility model relates to a gas sampling device for environmental detection, belonging to the field of environmental detection. Background Art

[0002] Atmospheric environment refers to the physical, chemical and biological characteristics of the air on which living things depend for survival. Physical characteristics mainly include air temperature, humidity, wind speed, air pressure and precipitation, all of which are caused by the driving force of solar radiation. Chemical characteristics mainly refer to the chemical composition of air: nitrogen, oxygen and hydrogen account for 99.96% of the troposphere, carbon dioxide accounts for about 0.03%, and there are some trace impurities and water vapor with large changes in content; atmospheric environment monitoring is the process of measuring the concentration of pollutants in the atmospheric environment, observing and analyzing their changes and their impact on the environment. Atmospheric pollution monitoring is to measure the types and concentrations of pollutants in the atmosphere, and observe their temporal and spatial distribution and change patterns.

[0003] Traditional atmospheric monitoring sampling devices are not convenient for collecting gases. They can only use one gas at a time, or can only collect gas at one collection point in a collection area at a time. To ensure the accuracy of environmental testing, it is generally necessary to collect gas at multiple collection points in a collection area to ensure the accuracy of the test results. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a gas sampling device for environmental detection.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A gas sampling device for environmental detection comprises a body and a plurality of sampling tubes, wherein the body is provided with a plurality of cavities at equal intervals, the sampling tubes correspond to the cavities, the sampling tubes are fixed to the outer surface of the body, the sampling tube is connected to a ventilation tube at one end away from the body, a sealing cap is threadedly connected to the end of the ventilation tube away from the sampling tube, a piston is provided inside the sampling tube, a pull plate is fixed to one side of the piston, an end of the pull plate passes through the inner cavity, a through hole is provided on the pull plate near one end of the inner cavity, and a driving mechanism matching the through hole is provided in the inner cavity.

[0007] Furthermore, the sampling tube includes a movable tube and a fixed tube, one end of the fixed tube is fixed to the outer surface of the body, the other end of the fixed tube is threadedly connected to one end of the movable tube, and the other end of the movable tube is connected to the ventilation pipe.

[0008] Furthermore, the driving mechanism includes a ramp block slidably connected to the inner cavity, the bottom sharp end of the ramp block is inserted into the through hole, a vertical plate is fixed at the top center of the ramp block, the top of the vertical plate passes through the top of the body and is movably connected to the limit handle, a fixed seat is fixed to the top of the body, and a limit slot matching the limit handle is opened inside the fixed seat.

[0009] Furthermore, the driving mechanism also includes a push plate fixed to the side of the pull plate, and the inner cavity is provided with an inlet and outlet hole matching with the push plate.

[0010] Furthermore, sliders are fixed to the outer surfaces of both sides of the inclined plane block, a slide groove matching with the slider is provided on the inner wall of the inner cavity, and a spring matching with the slider is provided in the slide groove.

[0011] Furthermore, a sealing ring is provided at the connecting end of the movable tube and the fixed tube, and a sealing gasket matching with the ventilation tube is provided in the inner wall of the sealing cap.

[0012] Furthermore, a sealing strip matched with the push plate is provided on the inner wall of the inlet and outlet hole, and the sealing strip and the push plate are squeezed together.

[0013] Beneficial effects of the utility model:

[0014] The utility model can use a plurality of sampling tubes on the body so that the device can perform sampling at multiple sampling points in a sampling area or perform sampling on multiple sampling areas, and the multiple samplings do not affect each other, thereby improving the practicability of the device.

[0015] Through the design of the driving mechanism, when collecting sample gas, the limit handle can be pressed so that the limit handle pushes the vertical plate and the inclined plane block to move into the inner cavity. The inclined plane block moves through the inclined surface at the end to squeeze the inner wall of the through hole, thereby pushing the pull plate to move into the inner cavity. While moving, the piston will be pulled to absorb the air in the sampling area into the sampling tube through the ventilation tube.

[0016] Through the design of the limit handle, the fixed seat and the limit card, when the inclined block is fully inserted into the through hole, the piston has moved to one end of the sampling tube, the sampling tube has also completed the gas sampling, and the limit handle has also moved to the position corresponding to the fixed seat. At this time, rotate the limit handle to rotate it to the bottom of the limit card slot, then release the limit handle, and under the push of the spring, the limit handle is stuck in the limit card slot, that is, the sampling action is completed.

[0017] Through the design of the decomposable structure of the sampling tube, when the sampling tube needs to be cleaned, the movable tube and the fixed tube can be disassembled, thereby facilitating the cleaning and maintenance of the sampling tube and facilitating the reuse of the sampling tube.

[0018] Through the design of the push plate, it is convenient to push the pull plate inserted into the inner cavity to move into the sampling tube, thereby realizing the reset movement of the piston, making it convenient to discharge the collected sample gas out of the sampling tube.

[0019] Through the design of the sealing cap and the sealing gasket, it is convenient to seal the ventilation tube, so that when the sampling tube is not in use, the sampling tube can be protected to prevent external air from contaminating the sampling tube, thereby affecting the composition of the gas sample and the test results. When in use, the leakage of sample gas inside the sampling tube can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The three-dimensional structure of a gas sampling device for environmental detection in the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of a gas sampling device for environmental detection in the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of a gas sampling device for environmental detection in the present utility model when not sampling;

[0024] Figure 4 This is a schematic diagram of the sampling structure of a gas sampling device for environmental detection according to the utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure of a slider, a spring and a ramp block of a gas sampling device for environmental detection according to the utility model;

[0026] Figure 6 The utility model is a schematic diagram of a pull plate structure of a gas sampling device for environmental detection.

[0027] In the figure, 1, machine body; 2, sampling tube; 3, movable tube; 4, fixed tube; 5, ventilation tube; 6, sealing cap; 7, sealing gasket; 8, piston; 9, pull plate; 10, through hole; 11, push plate; 12, inner cavity; 13, inlet and outlet holes; 14, slide groove; 15, slider; 16, spring; 17, inclined block; 18, vertical plate; 19, limit handle; 20, fixed seat; 21, limit slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 6 The utility model provides a technical solution of a gas sampling device for environmental detection, a gas sampling device for environmental detection, comprising a body 1 and a plurality of sampling tubes 2, wherein the body 1 is provided with a plurality of inner cavities 12 at equal intervals, the sampling tubes 2 correspond to the inner cavities 12, the sampling tubes 2 are fixed on the outer surface of the body 1, the sampling tube 2 is connected with a vent pipe 5 at one end away from the body 1, the vent pipe 5 is threadedly connected with a sealing cap 6 at one end away from the sampling tube 2, a piston 8 is provided inside the sampling tube 2, a pull plate 9 is fixed on one side of the piston 8, the end of the pull plate 9 passes through the inner cavity 12, a through hole 10 is provided at one end of the pull plate 9 close to the inner cavity 12, and a driving mechanism matched with the through hole 10 is provided in the inner cavity 12; the utility model can use the plurality of sampling tubes 2 on the body 1 so that the device can sample at multiple sampling points in a sampling area or sample multiple sampling areas, and the multiple samplings do not affect each other, thereby improving the practicality of the device.

[0030] See also Figure 1-Figure 4 The sampling tube 2 includes a movable tube 3 and a fixed tube 4, one end of the fixed tube 4 is fixed to the outer surface of the body 1, the other end of the fixed tube 4 is threadedly connected to one end of the movable tube 3, and the other end of the movable tube 3 is connected to the ventilation tube 5; through the design of the decomposable structure of the sampling tube 2, when the sampling tube 2 needs to be cleaned, the movable tube 3 and the fixed tube 4 can be disassembled, thereby facilitating the cleaning and maintenance of the sampling tube 2 and facilitating the reuse of the sampling tube 2.

[0031] See also Figure 1-Figure 6The driving mechanism includes an inclined block 17 slidably connected to the interior of the inner cavity 12, the bottom sharp end of the inclined block 17 is inserted into the through hole 10, a vertical plate 18 is fixed at the top center of the inclined block 17, the top of the vertical plate 18 penetrates to the top of the body 1 and is movably connected to the limit handle 19, a fixing seat 20 is fixed to the top of the body 1, a limiting card groove 21 matching the limit handle 19 is provided inside the fixing seat 20, sliders 15 are fixed to the outer surfaces of both sides of the inclined block 17, a slide groove 14 matching the slider 15 is provided on the inner wall of the inner cavity 12, and a spring 16 matching the slider 15 is provided in the slide groove 14; through the design of the driving mechanism, when collecting sample gas, the limit handle 19 can be pressed to make the limit handle 19 The vertical plate 18 and the inclined plane block 17 are pushed to move into the inner cavity 12. The inclined plane block 17 moves through the inclined plane at the end to squeeze the inner wall of the through hole 10, thereby pushing the pull plate 9 to move into the inner cavity 12. While moving, the piston 8 is pulled to absorb the air in the sampling area into the sampling tube 2 through the ventilation pipe 5. Through the design of the limit handle 19, the fixing seat 20, and the limit card 21, when the inclined plane block 17 is fully inserted into the through hole 10, at this time, the piston 8 has moved to one end of the sampling tube 2, and the sampling tube 2 has also completed gas sampling, and the limit handle 19 has also moved to the position corresponding to the fixing seat 20. At this time, the limit handle 19 is rotated to rotate the limit handle 19 to the bottom of the limit card slot 21. Then, the limit handle 19 is released. Under the push of the spring 16, the limit handle 19 is stuck in the limit card slot 21, that is, the sampling action is completed.

[0032] See also Figure 2-Figure 4 The driving mechanism also includes a push plate 11 fixed to the side of the pull plate 9, an inlet and outlet hole 13 matched with the push plate 11 is opened on the inner cavity 12, and a sealing strip (not shown in the figure) matched with the push plate 11 is provided on the inner wall of the inlet and outlet hole 13, and the sealing strip is squeezed together with the push plate 11; through the design of the push plate 11, it is convenient to push the pull plate 9 inserted into the inner cavity 12 to move into the sampling tube 2, thereby realizing the reset movement of the piston 8, and facilitating the discharge of the collected sample gas from the sampling tube 2.

[0033] The connecting end of the movable tube 3 and the fixed tube 4 is provided with a sealing ring (not shown in the figure), and the inner wall of the sealing cap 6 is provided with a sealing gasket 7 that cooperates with the ventilation tube 5; through the design of the sealing ring, the sealing between the movable tube 3 and the fixed tube 4 is improved, thereby improving the airtightness of the sampling tube 2.

[0034] When in use, the handheld device is brought to the sampling area, and then the sealing cap 6 on the first sampling tube 2 is removed. Next, the limiting handle 19 corresponding to the sampling tube 2 is pressed, so that the limiting handle 19 pushes the vertical plate 18 to move into the inner cavity 12. The vertical plate 18 moves while pushing the inclined block 17 to move. The inclined block 17 moves through the inclined surface at the end to squeeze the inner wall of the through hole 10, thereby pushing the pull plate 9 to move into the inner cavity 12. While moving, the piston 8 is pulled, and the air in the sampling area is absorbed into the sampling tube 2 through the ventilation pipe 5. When the inclined block 17 is fully inserted into the through hole 10, the piston 8 has moved to one end of the sampling tube 2. 2 has also completed the gas sampling, and the limit handle 19 has also moved to the position corresponding to the fixing seat 20. At this time, the limit handle 19 is rotated to rotate the limit handle 19 to the bottom of the limit slot 21. Then, the limit handle 19 is released. Under the push of the spring 16, the limit handle 19 is stuck in the limit slot 21, that is, the sampling action is completed. Then, the sealing cap 6 is sealed on the sampling tube 2 to prevent the gas sample collected in the sampling tube 2 from overflowing. In this way, through the multiple sampling tubes 2 on the body 1, the device can perform sampling at multiple sampling points in the sampling area or perform sampling on multiple sampling areas without affecting each other.

[0035] When detection is needed, it is only necessary to remove the lower sealing cap 6, and then unscrew the limit handle 19 from the limit slot 21, and then under the action of the spring 16, the inclined block 17 pushes the vertical plate 18 and the limit handle 19 to reset to the initial position, and then push the push plate 11 to move toward the body 1, and the push plate 11 pushes the piston 8 to move through the pull plate 9, and then the sample gas collected in the sampling tube 2 is pushed out through the ventilation tube 5, and then gas detection can be carried out.

[0036] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas sampling device for environmental detection, characterized in that: The invention comprises a machine body (1) and a plurality of sampling tubes (2), wherein the machine body (1) is provided with a plurality of inner cavities (12) at equal intervals, the sampling tubes (2) correspond to the inner cavities (12), the sampling tubes (2) are fixed on the outer surface of the machine body (1), the end of the sampling tube (2) away from the machine body (1) is connected with a ventilation tube (5), the end of the ventilation tube (5) away from the sampling tube (2) is threadedly connected with a sealing cap (6), a piston (8) is provided inside the sampling tube (2), a pull plate (9) is fixed on one side of the piston (8), the end of the pull plate (9) passes through the inner cavity (12), a through hole (10) is provided on the end of the pull plate (9) close to the inner cavity (12), and a driving mechanism matched with the through hole (10) is provided in the inner cavity (12).

2. A gas sampling device for environmental detection according to claim 1, characterized in that: The sampling tube (2) comprises a movable tube (3) and a fixed tube (4), one end of the fixed tube (4) is fixed to the outer surface of the body (1), the other end of the fixed tube (4) is threadedly connected to one end of the movable tube (3), and the other end of the movable tube (3) is connected to the ventilation tube (5).

3. A gas sampling device for environmental detection according to claim 2, characterized in that: The driving mechanism comprises a ramp block (17) slidably connected to the interior of the inner cavity (12), the bottom sharp end of the ramp block (17) is inserted into the through hole (10), a vertical plate (18) is fixed at the top center of the ramp block (17), the top of the vertical plate (18) penetrates to the top of the machine body (1) and is movably connected to a limit handle (19), a fixing seat (20) is fixed to the top of the machine body (1), and a limit slot (21) matching the limit handle (19) is provided inside the fixing seat (20).

4. A gas sampling device for environmental detection according to claim 3, characterized in that: The driving mechanism further comprises a push plate (11) fixed to the side of the pull plate (9), and the inner cavity (12) is provided with an inlet and outlet hole (13) matching with the push plate (11).

5. A gas sampling device for environmental detection according to claim 4, characterized in that: Slide blocks (15) are fixed to the outer surfaces of both sides of the inclined surface block (17), a slide groove (14) matching with the slide block (15) is provided on the inner wall of the inner cavity (12), and a spring (16) matching with the slide block (15) is provided in the slide groove (14).

6. A gas sampling device for environmental detection according to claim 5, characterized in that: The connecting ends of the movable tube (3) and the fixed tube (4) are provided with sealing rings, and the inner wall of the sealing plug (6) is provided with a sealing gasket (7) that matches the ventilation tube (5).

7. A gas sampling device for environmental detection according to claim 6, characterized in that: A sealing strip matched with the push plate (11) is provided on the inner wall of the inlet and outlet hole (13), and the sealing strip and the push plate (11) are squeezed together.

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