CN215574075U

CN215574075U - Gas sampling device

Info

Publication number: CN215574075U
Application number: CN202120474622.3U
Authority: CN
Inventors: 吴泰毓; 莫冰芳; 邱书姝
Original assignee: Chongqing Jiangcheng Environmental Protection Technology Co ltd
Current assignee: Chongqing Jiangcheng Environmental Protection Technology Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2022-01-18
Anticipated expiration: 2031-03-05

Abstract

The utility model relates to a gas sampling device which comprises a sampling cylinder, wherein the sampling cylinder is provided with a cylindrical inner cavity, a piston is installed in the sampling cylinder, one end of the sampling cylinder is provided with a moving mechanism for driving the piston to move, the other end of the sampling cylinder is provided with a gas inlet, a gas inlet plugging mechanism is installed on the sampling cylinder corresponding to the gas inlet, two opposite sides of one end, close to the gas inlet, of the sampling cylinder are respectively provided with a nitrogen inlet and a nitrogen outlet, and the nitrogen outlet is provided with a gas one-way valve. The utility model has the advantages of improving the purity of the sampled gas, simple structure, convenient use and high sampling efficiency.

Description

Gas sampling device

Technical Field

The utility model relates to the technical field of sampling, in particular to a gas sampling device.

Background

In some special places, often need carry out the sample detection to the air to guarantee the qualification of air quality, when taking a sample to gas, need use gas sampler, but current gas sampler, when taking a sample to gas, be difficult to the inside air of exhaust sampler, seriously cross the detection reliability that influences gas.

Disclosure of Invention

To the not enough of above-mentioned prior art, the technical problem that this patent application will solve provides one kind and can improve the pure degree of sample gas, simple structure, convenient to use, the efficient gas sampling device of sample.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a gas sampling device, includes the sampler barrel, the sampler barrel has cylindric inner chamber, install the piston in the sampler barrel, the one end of sampler barrel is provided with and is used for driving the motion that the piston carries out the motion, the other end of sampler barrel is provided with the air inlet, correspond the air inlet on the sampler barrel and install air inlet shutoff mechanism, nitrogen gas import and nitrogen gas export are installed respectively to the relative both sides of one end that are close to the air inlet on the sampler barrel, gaseous check valve is installed in the nitrogen gas export.

The movement mechanism comprises a sliding rod which is coaxially matched with the sampling cylinder in a sliding mode, one end of the sliding rod is fixedly connected with the piston, the other end of the sliding rod is located on the outer side of the sampling cylinder, a pull rod is fixedly mounted on the outer side of the sampling cylinder, a first electric cylinder is fixedly mounted on the outer side of the sampling cylinder in a corresponding mode, and a piston rod of the first electric cylinder is fixedly connected with the pull rod.

The air inlet plugging mechanism comprises two second electric cylinders fixedly mounted on the outer side of the sampling tube, piston rods of the second electric cylinders are fixedly connected with a plugging plate, and the plugging plate is opposite to an air inlet and is fixedly provided with a plug.

The sealing ring is fixedly mounted on the plugging plate and correspondingly arranged on the outer side of the plug.

The plugging plate is provided with a through hole, and the through hole and the plug are arranged in a staggered mode.

Wherein, the connection handle is fixedly arranged on the outer side of the wall of the sampling tube.

The sampling tube is provided with a guide rod opposite to the plugging plate, and the plugging plate is provided with a guide hole in sliding fit with the guide rod.

In conclusion, the utility model has the advantages of improving the purity of the sampled gas, simple structure, convenient use and high sampling efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a gas sampling device according to the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a top view of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1-3, a gas sampling device, includes a sampling tube 1, the sampling tube has cylindric inner chamber, install piston 2 in the sampling tube, the one end of sampling tube is provided with and is used for driving the motion that the piston carries out the motion, the other end of sampling tube is provided with air inlet 3, correspond the air inlet on the sampling tube and install air inlet shutoff mechanism, nitrogen gas inlet 4 and nitrogen gas export 5 are installed respectively to the relative both sides of one end that are close to the air inlet on the sampling tube, the gaseous check valve is installed to the nitrogen gas export.

Like this, drive gas sampling device to the sampling position, nitrogen gas access connection nitrogen generator, under the initial condition, the air inlet is kept away from to the piston, nitrogen gas generator takes place nitrogen gas and gets into the sampler barrel, catch up the air in the sampler barrel, the air passes through the discharge of gaseous check valve, be nitrogen gas in the sampler barrel, later motion drives piston motion to air inlet one side, air inlet shutoff mechanism opens the air inlet, motion drives the piston to the direction motion of keeping away from the air inlet, sample gas, after the sample, air inlet shutoff mechanism carries out the shutoff to the air inlet, later with gas sampling device take over can. When the gas in the sampling cylinder is required to be taken out, the nitrogen outlet is connected with the detector through a pipeline, and the moving mechanism drives the piston to extrude the gas. Degree of automation is high, and is efficient, improvement that can be better the gas's of sample purity.

The movement mechanism comprises a slide bar 6 which is coaxially matched with the sampling cylinder in a sliding manner, one end of the slide bar is fixedly connected with the piston, the other end of the slide bar is positioned on the outer side of the sampling cylinder and is fixedly provided with a pull rod 7, a first electric cylinder 8 is correspondingly and fixedly arranged on the outer side of the sampling cylinder, and a piston rod of the first electric cylinder is fixedly connected with the pull rod. The first electric cylinder drives the pull rod to move, and then drives the slide rod and the piston to move along the sampling cylinder.

The air inlet plugging mechanism comprises two second electric cylinders 9 fixedly mounted on the outer side of the sampling tube, piston rods of the second electric cylinders are fixedly connected with a plugging plate 10, and plugs 11 are fixedly mounted on the plugging plate opposite to the air inlet. The second electric cylinder drives the plugging plate to move.

The sealing ring is fixedly mounted on the plugging plate and correspondingly arranged on the outer side of the plug. The gas to the sample that can be better seals, avoids external gas to cause its pollution.

The plugging plate is provided with a through hole 13, and the through hole and the plug are arranged in a staggered mode. Can make the gas of sample get into the sampler barrel fast, reduce the hindrance of shutoff board.

Wherein, the connection handle 14 is fixedly arranged on the outer side of the wall of the sampling tube. Is convenient for holding by hand.

The device comprises a nitrogen generator, a lithium battery, a PLC controller and a first electric cylinder, wherein the PLC controller is connected with the lithium battery and is used for controlling the actions of the first electric cylinder, the second electric cylinder and the nitrogen generator, and the lithium battery is used for supplying power.

Wherein, the last dead man fixed mounting of sampling tube has guide bar 15 to the shutoff board, be provided with the guiding hole with guide bar sliding fit on the shutoff board. The movement of the plugging plate is convenient to guide.

The principle is as follows:

drive gas sampling device to the sample site, nitrogen gas access connection nitrogen generator, under the initial condition, the air inlet is kept away from to the piston, nitrogen gas generator takes place nitrogen gas and gets into the sampler barrel, catch up the air in the sampler barrel, the air discharges through gaseous check valve, be nitrogen gas in the sampler barrel, later motion drives piston motion to air inlet one side, air inlet shutoff mechanism opens the air inlet, motion drives the piston to the direction motion of keeping away from the air inlet, sample gas, after the sample, air inlet shutoff mechanism carries out the shutoff to the air inlet, later with gas sampling device take over can. When the gas in the sampling cylinder is required to be taken out, the nitrogen outlet is connected with the detector through a pipeline, and the moving mechanism drives the piston to extrude the gas. Degree of automation is high, and is efficient, improvement that can be better the gas's of sample purity.

Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides a gas sampling device, its characterized in that, includes the sampler barrel, the sampler barrel has cylindric inner chamber, install the piston in the sampler barrel, the one end of sampler barrel is provided with and is used for driving the motion that the piston carries out the motion, the other end of sampler barrel is provided with the air inlet, correspond the air inlet on the sampler barrel and install air inlet shutoff mechanism, nitrogen gas import and nitrogen gas export are installed respectively to the relative both sides of one end that are close to the air inlet on the sampler barrel, gaseous check valve is installed in the nitrogen gas export.

2. The gas sampling device according to claim 1, wherein the movement mechanism comprises a slide rod coaxially and slidably fitted in the sampling cylinder, one end of the slide rod is fixedly connected with the piston, the other end of the slide rod is positioned outside the sampling cylinder and is fixedly provided with a pull rod, a first electric cylinder is correspondingly and fixedly arranged outside the sampling cylinder, and a piston rod of the first electric cylinder is fixedly connected with the pull rod.

3. The gas sampling device according to claim 2, wherein the air inlet plugging mechanism comprises two second electric cylinders fixedly installed on the outer side of the sampling cylinder, piston rods of the second electric cylinders are fixedly connected with a plugging plate, and plugs are fixedly installed on the plugging plate opposite to the air inlet.

4. A gas sampling device according to claim 3, wherein the sealing plate is fixedly provided with a sealing ring, and the sealing ring is correspondingly arranged outside the plug.

5. A gas sampling device according to claim 4, wherein the blanking plate is provided with perforations which are offset from the blanking plug.

6. The gas sampling device of claim 1, wherein the connection handle is fixedly mounted on the outer side of the wall of the sampling tube.

7. A gas sampling device according to claim 1, wherein the sampling tube is fixedly provided with a guide rod facing the blanking plate, and the blanking plate is provided with a guide hole in sliding fit with the guide rod.