CN211347604U

CN211347604U - Gas sampling device for environmental monitoring

Info

Publication number: CN211347604U
Application number: CN202020030751.9U
Authority: CN
Inventors: 杨志; 李文义
Original assignee: Yunnan Minzu University
Current assignee: Yunnan Minzu University
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-08-25
Anticipated expiration: 2030-01-08

Abstract

The utility model discloses a gas sampling device for environmental monitoring, the power distribution box comprises a box body, the bottom half be the grid structure, the middle part in the box be equipped with the orifice plate, fall into two-layer space about the box, upper space is sampling chamber, lower floor's space is the control room, the control room in be equipped with the cylinder, the piston rod of cylinder pass the orifice plate and sample indoor piston connection, the outlet duct on sampling chamber side upper portion be equipped with the three-way valve, the three-way valve respectively with blast pipe, nitrogen gas union coupling, sampling chamber top center be equipped with the intake pipe, and the intake pipe is equipped with the valve, coupling hose one end and intake-tube connection, the other end is connected with the trachea of sample connection, the sample connection be equipped with the seal closure, sample connection side be equipped with the contact tube, the contact tube is equipped. The utility model discloses collect sampling, clearance function in an organic whole, have the sampling convenience and clear up thorough advantage, can ensure the validity of sampling sample in succession many times.

Description

Gas sampling device for environmental monitoring

Technical Field

The utility model belongs to the technical field of environmental monitoring, concretely relates to gas sampling device for environmental monitoring.

Background

In the working process of environmental monitoring, gas sampling and analysis are carried out on monitoring points, and the method is one of important means for knowing the air quality and the pollution condition. The prior art sample thief is when sampling many times, and residual gas and impurity can be attached to in the sample gas of previous sampling in the sample thief cavity, lead to the sample of next sampling to be contaminated, influence the accuracy of analysis result, consequently, after sampling once, need clear up the sample thief, however prior art clearance operation is more troublesome, and the effect is not good moreover. For this reason, it is necessary to develop a gas sampling apparatus for environmental monitoring that can solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas sampling device for environmental monitoring.

The utility model aims at realizing like this, the power distribution box comprises a box body, the bottom half be the grid structure, the box in the middle part be equipped with the orifice plate, fall into two-layer space about the box, upper space is sampling chamber, lower floor's space is the control room, the control room in be equipped with the cylinder, the piston rod of cylinder pass orifice plate and sampling chamber's piston connection, the outlet duct on sampling chamber side upper portion be equipped with the three-way valve, the three-way valve respectively with blast pipe, nitrogen gas union coupling, sampling chamber top center be equipped with the intake pipe, and the intake pipe is equipped with the valve, coupling hose one end and intake-tube connection, the other end is connected with the trachea of sampling opening, the sampling opening be equipped with the closing cap, sampling opening side be equipped with the contact tube, the contact tube is.

The utility model has the advantages that: the utility model integrates the functions of sampling and cleaning, has the advantages of convenient sampling and thorough cleaning, can ensure the effectiveness of a plurality of continuous sampling samples, and avoids the problem of mutual pollution among the samples; the utility model discloses also can be used to the gaseous sampling of outdoor wind direction changeing environment, when the wind direction changes, need not remove whole device, only need simple operation can adjust the sampling opening orientation, convenient operation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the present invention;

in the figure: 1-box body, 2-pore plate, 3-cylinder, 4-piston, 5-air outlet pipe, 6-air outlet pipe, 7-nitrogen pipe, 8-air inlet pipe, 9-sampling port, 10-sealing cover, 11-delivery pipe, 12-annular groove, 13-supporting rod, 14-hoop, 15-locking nut and 16-wind vane.

Detailed Description

The following description of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the present invention in any way, and any alterations or replacements made based on the teachings of the present invention are all within the protection scope of the present invention.

As shown in the accompanying drawings 1-2 the utility model discloses a box 1, box 1 bottom be the grid structure, box 1 in the middle part be equipped with orifice plate 2, fall into upper and lower two-layer space with box 1, upper space is sampling chamber, lower floor's space is the control room, the control room in be equipped with cylinder 3, the piston rod of cylinder 3 pass orifice plate 2 and be connected with piston 4 in the sampling chamber, outlet duct 5 on sampling chamber side upper portion be equipped with the three-way valve, the three-way valve is connected with blast pipe 6, nitrogen gas pipe 7 respectively, sampling chamber top center be equipped with intake pipe 8, and intake pipe 8 is equipped with the valve, coupling hose one end and intake pipe 8 are connected, the other end is connected with the trachea of sampling mouth 9, sampling mouth 9 be equipped with sealing cover 10, sampling mouth 9 side be equipped with contact tube 11, contact tube 11 is equipped with the valve.

Preferably, box 1 top be equipped with the ring channel 12 that uses intake pipe 8 as the center, in the ring channel 12 was gone into to bracing piece 13 lower extreme card, and with ring channel 12 sliding fit, bracing piece 13 upper end was equipped with clamp 14, and clamp 14 card is on the trachea of sampling port 9, bracing piece 13 be the screw rod, the cover is equipped with lock nut 15 on the screw rod.

Preferably, the trachea of the sampling port 9 is made of hard plastic tube.

Preferably, the clamp 14 is a one-piece spring clamp with an opening.

Preferably, the sampling port 9 has a horn-shaped structure.

Preferably, the inner wall of the sampling port 9 is provided with an internal thread, the outer side of the sealing cover 10 is provided with an external thread, and the sampling port 9 and the sealing cover 10 are detachably connected through an internal thread structure and an external thread structure.

Preferably, the bottom of the sampling port 9 is provided with a wind vane 16.

Preferably, the mouth of the exhaust pipe 6 is provided with a sampling bag containing a one-way valve.

Preferably, the nitrogen pipe 7 is connected with a nitrogen bottle.

The utility model discloses theory of operation and working process: when the device is used, the device is placed in a sampling place, the sealing cover 10 is opened, the sampling port 9 is aligned to a sampling position, then the cylinder 3 is controlled, the piston 4 is lowered, and a gas sample is pumped into a sampling chamber through the sampling port 9; then closing a valve of the air inlet pipe 8, opening a passage from the three-way valve to the exhaust pipe 6, keeping the passage from the three-way valve to the nitrogen pipe 7 closed, simultaneously controlling the piston 4 to ascend, guiding the sample gas into a sampling bag through the exhaust pipe 6, and then taking down the sampling bag to finish primary sampling;

when the interior of the device needs to be cleaned, the sealing cover 10 is kept to be installed at the sampling port 9, the valve of the air inlet pipe 8 is opened, the valve of the delivery pipe 11 is closed, then the passage from the three-way valve to the nitrogen pipe 7 is opened, the passage from the three-way valve to the exhaust pipe 6 is kept closed, nitrogen is blown into the sampling chamber, residual gas and impurities are blown up, and meanwhile, the piston 4 continuously descends to enable the sampling chamber, the connecting hose and the sampling port 9 to be filled with the nitrogen; then, a passage from the three-way valve to the nitrogen pipe 7 is closed, a valve of the eduction pipe 11 is opened, the cylinder 3 is started, the piston 4 discharges the gas in the sampling chamber from the eduction pipe 11 in the ascending process, and the gas flow continuously flushes the connecting hose and the sampling port 9 in the discharging process, so that the cleaning effect is guaranteed; after cleaning, continuing sampling operation according to the process;

when need the windward sampling in the open air, can observe the wind direction according to wind vane 16, then open clamp 14, turn into windward position with sample connection 9, bracing piece 13 removes to sample connection 9 below along ring channel 12 simultaneously to clamp 14 is blocked into again to the trachea with sample connection 9, makes sample connection 9 fixed, twists lock nut 15 again, makes bracing piece 13 fixed, can.

Claims

1. The utility model provides a gas sampling device for environmental monitoring, includes box (1), its characterized in that box (1) bottom be the grid structure, box (1) in the middle part be equipped with orifice plate (2), with box (1) fall into upper and lower two-layer space, upper space be the sampling chamber, lower floor's space is the control room, the control room in be equipped with cylinder (3), the piston rod of cylinder (3) pass orifice plate (2) and be connected with piston (4) in the sampling chamber, outlet duct (5) on sampling chamber side upper portion be equipped with the three-way valve, the three-way valve is connected with blast pipe (6), nitrogen gas pipe (7) respectively, sampling chamber top center be equipped with intake pipe (8), and intake pipe (8) are equipped with the valve, connect hose one end and be connected with intake pipe (8), the other end is connected with the trachea of sampling mouth (9), sampling mouth (9) be equipped with seal closure (10), the side surface of the sampling port (9) is provided with a delivery pipe (11), and the delivery pipe (11) is provided with a valve.

2. The gas sampling device for environmental monitoring according to claim 1, wherein the top of the box body (1) is provided with an annular groove (12) which takes the gas inlet pipe (8) as a center, the lower end of the support rod (13) is clamped in the annular groove (12) and is in sliding fit with the annular groove (12), the upper end of the support rod (13) is provided with a clamp (14), the clamp (14) is clamped on a gas pipe of the sampling port (9), the support rod (13) is a screw rod, and a locking nut (15) is sleeved on the screw rod.

3. The gas sampling device for environmental monitoring as recited in claim 2, wherein the gas pipe of the sampling port (9) is a rigid plastic pipe.

4. The gas sampling device for environmental monitoring according to claim 2, wherein the clamp (14) is an integral elastic clamp with an opening.

5. The gas sampling device for environmental monitoring according to claim 1 or 2, wherein the sampling port (9) has a horn-like structure.

6. The gas sampling device for environmental monitoring as claimed in claim 1, wherein the inner wall of the sampling port (9) is provided with internal threads, the outer side of the sealing cover (10) is provided with external threads, and the sampling port (9) and the sealing cover (10) are detachably connected through an internal and external thread structure.

7. The gas sampling device for environmental monitoring according to claim 1, wherein a wind vane (16) is arranged at the bottom of the sampling port (9).

8. The gas sampling device for environmental monitoring as recited in claim 1, wherein the nozzle of the exhaust pipe (6) is provided with a sampling bag containing a one-way valve.

9. The gas sampling device for environmental monitoring according to claim 1, wherein the nitrogen gas pipe (7) is connected to a nitrogen gas cylinder.