Mine closed environment sampling barrel

Abstract

The utility model discloses a mine closed environment sampling barrel which comprises a cubic sampling barrel body, the sampling barrel body is of a sealed structure, an air extraction opening is formed in the sampling barrel body, an air extraction assembly is connected to the air extraction opening, and the air extraction assembly is used for extracting air in the sampling barrel body; an in-barrel air bag is arranged in the sampling barrel body, and the volume can be increased when the in-barrel air bag is inflated; the in-barrel air bag is connected with a ventilation pipe extending out of the sampling barrel body, and the head end of the ventilation pipe is connected with an air bag ventilation valve; sampling gas in the sampling barrel is extruded by increasing the volume of the air bag in the barrel; a flexible sample injection pipe is further arranged in the sampling barrel body, a breather pipe extending out of the sampling barrel body is communicated with the flexible sample injection pipe, a sample injection pipe hand valve is arranged on the breather pipe, and air is injected into the sampling barrel body after the sample injection pipe hand valve is opened. The inflatable in-barrel air bag is arranged in the sampling barrel body, when the air bag is inflated, the pressure in the sampling barrel is increased, and pressure can be provided for outflow of collected samples.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mine equipment technical field, concretely relates to a mine sealed environment sampling bucket. BACKGROUND

[0002] The mine is a special sealed or semi-sealed environment, and gas circulation is slow, and combustible, toxic and asphyxiating gas can be produced along with internal operation of the mine; during operation, the gas composition in the mine can also be changed due to mechanical operation and personnel activities.

[0003] Gas sampling and analysis of the mine sealed environment help to obtain accurate gas sample component data and ensure safe operation of equipment and personnel, and therefore, how to quickly obtain a gas sample representative of the mine sealed environment becomes a prerequisite and requirement for gas analysis.

[0004] Conventional gas samplers, such as needle cylinder type and air bag type, are all formed by changing the internal volume to form a small negative pressure for sampling, and residual gas in the needle cylinder and air bag cannot be well removed, so that the sampled sample cannot completely represent the characteristics of the environment gas, and when accurate analysis is required, the demand cannot be met. UTILITY MODEL CONTENT

[0005] The utility model provides a mine sealed environment sampling bucket, which aims to sample gas under the mine and improve the accuracy of sampling.

[0006] Therefore, the utility model adopts the following technical scheme:

[0007] The mine sealed environment sampling bucket comprises a sampling bucket body, a compressed air tank, a compressed air tank outlet valve, a vacuum pump, a vacuum pump air extraction valve, an air extraction pipeline, an air bag in the bucket, an air bag air valve, a flexible sampling tube, a sampling tube hand valve and other connecting pipelines.

[0008] The sampling bucket body is a cuboid structure, is hollow, has a handle, a compressed air tank mounting groove and a vacuum pump mounting groove at the top, and has through holes at the rear of the two grooves; three air extraction holes are formed on one side of the sampling bucket body, and a sampling hole and an air bag hole are formed on the other side opposite to the one side.

[0009] The compressed air tank is installed in the compressed air tank mounting groove at the top of the sampling bucket body, the compressed air tank outlet is provided with the compressed air tank outlet valve, and the other end of the outlet valve is connected to the air inlet of the vacuum pump through a hard pipeline.

[0010] The vacuum pump is installed in a vacuum pump installation groove on the top of the sampling barrel, an air inlet is connected to high pressure air, the high pressure air flows in the vacuum pump and flows out from the outlet at the rear of the vacuum pump; on the same side of the air inlet of the vacuum pump, an air outlet is arranged, the air outlet is connected to three air outlet holes on the sampling barrel through a hard pipeline, and the edges of the air outlet holes are sealed with the outer wall of the hard pipeline; the hard pipelines connected to the three air outlet holes are connected in parallel and are finally connected to one hard pipeline and connected to the air outlet of the vacuum pump.

[0011] The air bag in the barrel is made of flexible and sealed material, is arranged in the sampling barrel, can be inflated, has a larger volume after inflation, and is completely isolated from the outside after inflation; the air bag in the barrel has an inflation hole on the side, is connected to an external hand valve through a pipeline, the pipeline passes through the hole of the air bag, and the outer wall of the pipeline is sealed with the edge of the hole of the air bag.

[0012] The flexible sampling pipe is made of soft material and can swing disorderly under the action of flowing gas when gas is sampled through the flexible sampling pipe; the flexible sampling pipe is installed on a hard pipeline, the hard pipeline passes through a sampling hole on the sampling barrel and is connected to an external sampling pipe hand valve, and the edge of the sampling hole is sealed with the outer wall of the hard pipeline.

[0013] The utility model discloses the beneficial effect lies in:

[0014] 1. use the high pressure air in compressed air tank as the vacuum pump power source, not involve electric energy, can use in the explosion -proof area;

[0015] 2. the air outlet hole of vacuum pump is connected to three air outlet holes through three parallel pipelines, and when air is extracted, different areas in the sampling barrel can be more effectively covered, and the original gas in the barrel can be more effectively extracted;

[0016] 3. compressed air tank and vacuum pump are installed on the both sides of the upper handle of sampling barrel, can effectively balance the gravity center of whole device, is easier to catch and stabilize when carrying out the operation;

[0017] 4. the flexible sampling pipe is arranged in the sampling barrel, and the flexible sampling pipe is in a swing state during sampling, the swing state can effectively improve the flow speed of the gas in the sampling barrel, and the swing process is also beneficial to the collected gas sample to quickly reach every corner of the sampling barrel, compared with the conventional sampling hole, the consistency of the finally collected sample and the gas in the environment outside the sampling barrel can be effectively ensured;

[0018] 5. the inflatable air bag in the barrel is arranged in the sampling barrel, when the air bag is inflated, the pressure in the sampling barrel is increased, and pressure can be provided for the outflow of the collected sample. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the top view angle of the utility model;

[0020] Figure 2 It is the structure schematic diagram of the side view angle of the utility model;

[0021] In the drawing: sampling barrel 1, compressed air tank 2, compressed air tank outlet valve 3, vacuum pump 4, vacuum pump exhaust valve 5, exhaust pipeline 6, barrel air bag 7, air bag breather valve 8, flexible sample inlet pipe 9, sample inlet pipe hand valve 10. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with the drawings and specific embodiments:

[0023] Example 1: gas sample sampling

[0024] Before sampling operation, carry out preparatory work. First, the compressed air tank 2, and the compressed air tank outlet valve 3 together are taken off, and the compressed air tank 2 is flushed into 0.6MPa compressed air, after the inflation is completed, the compressed air tank 2, and the compressed air tank outlet valve 3 together are installed back.

[0025] The sampling barrel 1 is opened in the mine sampling environment, the air bag breather valve 8 is closed after 30 seconds, and the air pressure in the barrel air bag 7 is reduced to the ambient air pressure.

[0026] In turn, the sample inlet pipe hand valve 10, the compressed air tank outlet valve 3 are opened, after confirming that there is airflow spouting from the outlet of the vacuum pump 4, the vacuum pump exhaust valve 5 is opened, the negative pressure generated by the vacuum pump 4 passes through the exhaust pipeline 6 and rapidly exhausts the gas in the sampling barrel 1, and forms negative pressure in the sampling barrel, starts sampling, at this time, starts timing.

[0027] Under the action of the negative pressure in the sampling barrel 1, the ambient gas is rapidly collected into the sampling barrel 1 through the sample inlet pipe hand valve 10, the flexible sample inlet pipe, and due to the flow of the gas in the sampling process, the flexible sample inlet pipe 9 is driven to swing disorderly, in the swinging process, the flow of the original residual gas in the sampling barrel 1 is disturbed, and the rapid circulation of the gas in the sampling barrel is promoted.

[0028] When timing 300 seconds, the vacuum pump exhaust valve 5, the compressed air outlet valve 3, the sample inlet pipe hand valve 10 are closed in turn, and the gas sample sampling operation is completed.

[0029] Example 2: gas sample sampling

[0030] When the gas sample needs to be analyzed, the following preparatory work is done: the other end of the sample inlet pipe hand valve 10 is connected to the analysis instrument, and the air bag breather valve 8 is connected to the 0.3MPa compressed air source.

[0031] Slowly open the air bag breather valve 8, inflate the barrel air bag 7 for 10 seconds, the barrel air bag 7 gradually expands and becomes larger, so that the volume of the gas sample in the barrel air bag 7 is compressed, and the pressure in the barrel air bag 7 is increased.

[0032] Opening the sample tube hand valve 10, the gas sample in the gas bag 7 in the barrel is under the action of pressure, through the flexible sample tube 9, the sample tube hand valve 10, into the analyzer for analysis.

Claims

1. A mine seal environment sampling bucket, characterized by, The sampling barrel (1) is in a sealed structure, and an air extraction port is arranged on the sampling barrel (1), and an air extraction assembly is connected to the air extraction port, and the air extraction assembly is used for extracting the gas in the sampling barrel (1); The sampling barrel (1) is internally provided with an inner barrel air bag (7), the volume of the inner barrel air bag (7) can be increased when the inner barrel air bag (7) is inflated, the inner barrel air bag (7) is connected with a gas pipe extending out of the sampling barrel (1), and a gas bag air valve (8) is connected to the head end of the gas pipe; the sampling gas in the sampling barrel (1) is squeezed out by increasing the volume of the inner barrel air bag (7); The sampling barrel (1) is internally provided with a flexible sampling pipe (9), the flexible sampling pipe (9) is connected with a gas pipe extending out of the sampling barrel (1), and a sampling pipe hand valve (10) is arranged on the gas pipe, and the sampling pipe hand valve (10) is opened to introduce the gas into the sampling barrel (1).

2. The mine seal environment sampling bucket of claim 1, wherein, The air extraction assembly comprises a compressed air tank (2), a compressed air tank outlet valve (3), a vacuum pump (4), a vacuum pump air extraction valve (5) and an air extraction pipeline (6); the compressed air tank (2) is connected to the vacuum pump (4), the compressed air tank (2) provides power for the air pump, three air extraction holes are formed in one side of the sampling barrel (1), and the three air extraction holes are all connected with the air extraction pipeline (6), and the gas in the sampling barrel (1) is extracted by the vacuum pump (4).

3. The mine seal environment sampling bucket of claim 2, wherein, The sampling barrel (1) is internally provided with a flexible sampling pipe (9), the flexible sampling pipe (9) is connected with a gas pipe extending out of the sampling barrel (1), and a sampling pipe hand valve (10) is arranged on the gas pipe, and the sampling pipe hand valve (10) is opened to introduce the gas into the sampling barrel (1).

4. The mine seal environment sampling bucket of claim 1, wherein, The gas pipe is a hard pipe, the flexible sampling pipe (9) comprises two flexible sampling pipes (9), and the flexible sampling pipe (9) can be randomly swung under the action of the flowing gas.

5. The mine seal environment sampling bucket of claim 1, wherein, The inner barrel air bag (7) is arranged at the bottom of the sampling barrel (1).

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