Experimental device for detecting gas output of coal bed gas

Abstract

The utility model relates to an experimental device, in particular to an experimental device for detecting the gas output of coal bed gas. Comprising a gas pump, a temperature controller, a sample chamber, a vacuum pump, a chromatographic instrument, a gas collection tank, an instrument panel, a three-grid type sample box, a gas baffle, a first grid electric control valve, a second grid electric control valve, a third grid electric control valve, a first gas guide pipe, a second gas guide pipe and a third gas guide pipe, the top end of the vacuum pump is connected with a second gas-guide tube, the right side of the second gas-guide tube is connected with a chromatograph, the right side of the chromatograph is connected with a third gas-guide tube, and the gas collecting tank is connected to the lower end of the second gas-guide tube. By designing the three-lattice sample box, the device can realize simultaneous detection when a plurality of samples are loaded at one time, so that the problem that the samples need to be frequently replaced in a traditional method is avoided, and the detection period is greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to an experimental device, especially a coal bed gas gas output detection experimental device. BACKGROUND

[0002] The main role of the coal bed gas detection device is to analyze the gas samples collected from the coal bed, which is crucial for assessing the methane content of the coal bed, predicting safety hazards (such as gas explosion risks) during coal mining, and evaluating the development and utilization potential of coal bed gas resources. This type of device usually includes multiple links such as gas sampling, pretreatment, component analysis, and data processing, aiming to provide instant and reliable gas component information.

[0003] However, in the case of repeated feeding experiments for a large number of samples, the existing coal bed gas detection device requires frequent manual feeding and detection steps, resulting in a long overall detection period and difficulty in meeting the demand for rapid detection. Gas collection after detection may also cause gas leakage, leading to sample cross-contamination and affecting the accuracy of the detection results. SUMMARY

[0004] To overcome the shortcomings of repeated feeding experiments when the number of samples is large and the inaccuracy of results caused by non-standard gas collection, the utility model provides a coal bed gas gas output detection experimental device.

[0005] The technical scheme is as follows: a coal bed gas gas output detection experimental device, including a gas pump, a temperature controller, a sample chamber, a vacuum pump, a chromatograph, a gas collection tank, an instrument panel, a three-format sample box, a gas baffle, a first grid electric control valve, a second grid electric control valve, a third grid electric control valve, a first gas guide pipe, a second gas guide pipe, a third gas guide pipe, the gas pump is connected to the left side of the sample chamber, the temperature controller is embeddedly connected to the sample chamber, the vacuum pump is connected to the top end of the sample chamber, the three-format sample box is slidably connected to the inner side of the sample chamber, the top end of the second gas guide pipe is connected to the second gas guide pipe, the right side of the second gas guide pipe is connected to the chromatograph, the right side of the chromatograph is connected to the third gas guide pipe, the gas collection tank is connected to the lower end of the second gas guide pipe, the top end of the gas collection tank is connected to the instrument panel, the gas baffle is slidably connected in the sample chamber, one end of the first gas guide pipe is connected to the top end of the gas baffle, the other end of the first gas guide pipe is connected to the gas pump, the first grid electric control valve, the second grid electric control valve, and the third grid electric control valve are arrayed and connected to the top end of the gas baffle, and the first grid electric control valve, the second grid electric control valve, and the third grid electric control valve correspond to the three spaces in the three-format sample box, respectively.

[0006] As a preferred embodiment, it further includes a wedge-shaped block and a spring, the inner side of the three-format sample box is connected to the wedge-shaped block at the front end, the wedge-shaped block is provided with an inclined surface at the bottom, when the three-format sample box is pushed into the sample chamber, the wedge-shaped block pushes the gas baffle downward through the inclined surface to make contact with the upper end of the three-format sample box, the inner side of the sample chamber is connected to the spring at the upper end, and the lower end of the spring is connected to the gas baffle.

[0007] As preferred, a safety valve is further included, and the safety valve is connected to the third gas guide pipe.

[0008] As preferred, the bottom end of the first gas guide pipe is connected to the gas baffle at three positions, and the three positions correspond to three spaces in the three-format sample box, and the three positions of the first gas guide pipe are provided with air inlet electric control valves.

[0009] As preferred, a sealing gasket is further included, and the sealing gasket is connected to the front end of the inner side of the three-format sample box.

[0010] As preferred, a support frame is further included, and the lower end of the chromatograph is provided with the support frame.

[0011] Compared with the prior art, the device has the following advantages: 1. By designing the three-format sample box, the device can realize simultaneous detection of multiple samples loaded at one time, avoiding the problem of frequent sample replacement in the traditional method, and greatly shortening the detection period. In addition, each sample compartment is independently controlled, ensuring the consistency and isolation of the sample detection environment, reducing cross contamination between samples, and improving the accuracy of the detection results.

[0012] 2. The wedge block and spring mechanism ensure good sealing of the sample chamber, effectively preventing gas leakage; and the gas collection situation is monitored in real time through the gas collection tank and instrument panel to avoid the risk that may be caused by excessive collection. At the same time, the reliability and repeatability of the experimental data are also ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.

[0014] Figure 2 It is another perspective three-dimensional structure schematic diagram of the utility model.

[0015] Figure 3 It is a sample chamber internal structure schematic diagram of the utility model.

[0016] Figure 4 It is a three-format sample box three-dimensional structure schematic diagram of the utility model.

[0017] In the above drawings: 1_pump, 2_thermostat, 3_sample chamber, 4_vacuum pump, 5_chromatograph, 6_gas collection tank, 61_safety valve, 7_instrument panel, 8_three-format sample box, 81_gas baffle, 9_no. 1 compartment electric control valve, 91_no. 2 compartment electric control valve, 92_no. 3 compartment electric control valve, 10_first gas guide pipe, 101_second gas guide pipe, 102_third gas guide pipe, 11_wedge block, 12_spring, 13_sealing gasket, 14_air inlet electric control valve, 15_support frame. DETAILED DESCRIPTION

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] An experimental device for detecting the gas output of coalbed methane, such as... Figures 1-4 As shown, the system includes an air pump 1, a temperature controller 2, a sample chamber 3, a vacuum pump 4, a chromatograph 5, a gas collecting tank 6, an instrument panel 7, a three-compartment sample box 8, a gas baffle 81, a first-compartment electric valve 9, a second-compartment electric valve 91, a third-compartment electric valve 92, a first gas guide tube 10, a second gas guide tube 101, a third gas guide tube 102, a sealing gasket 13, and a support frame 15. The air pump 1 is connected to the left side of the sample chamber 3 and is used to deliver inert gas. The temperature controller 2 is embedded in the sample chamber 3 and is used to heat the sample chamber 3. The vacuum pump 4 is connected to the top of the sample chamber 3. The sample chamber 3 has an opening on its rear side, and the three-compartment sample box 8 is slidably connected to the opening of the sample chamber 3. The sealing gasket 13 is connected to the front end of the inner side of the three-compartment sample box 8, and the rear end of the three-compartment sample box 8 is adapted to the opening of the sample chamber 3. The sealing gasket 13 is used to seal the sample chamber 3. The sample box 8 and sample chamber 3 are sealed. The top of the vacuum pump 4 is connected to the second gas guide tube 101. The right side of the second gas guide tube 101 is connected to the chromatograph 5. The lower end of the chromatograph 5 is equipped with a support frame 15. The right side of the chromatograph 5 is connected to the third gas guide tube 102. The gas collecting tank 6 is connected to the lower end of the second gas guide tube 101. The top of the gas collecting tank 6 is connected to the instrument panel 7. The gas baffle 81 is slidably connected in the sample chamber 3 and can move up and down in the sample chamber 3. One end of the first gas guide tube 10 is connected to the top of the gas baffle 81, and the other end of the first gas guide tube 10 is connected to the gas pump 1. The first compartment electric control valve 9, the second compartment electric control valve 91, and the third compartment electric control valve 92 are connected in an array to the top of the gas baffle 81. The first compartment electric control valve 9, the second compartment electric control valve 91, and the third compartment electric control valve 92 correspond to the three spaces in the three-compartment sample box 8.

[0020] like Figure 3 and Figure 4 As shown, it also includes a wedge block 11 and a spring 12. The wedge block 11 is connected to the upper part of the front end of the three-compartment sample box 8. The bottom front side of the wedge block 11 is provided with an inclined surface, which gradually slopes downward from front to back. When the three-compartment sample box 8 is pushed into the sample chamber 3, the wedge block 11 moves down through the inclined surface to press against the gas baffle 81 and contacts the upper end of the three-compartment sample box 8. The bottom rear side of the wedge block 11 is a flat surface. The upper end of the inner side of the sample chamber 3 is connected to a spring 12, and the lower end of the spring 12 is connected to the gas baffle 81.

[0021] like Figure 2 As shown, it also includes a safety valve 61, which is connected to the third air duct 102.

[0022] like Figure 3As shown, the first gas guide pipe 10 has three connections with the gas baffle 81, and the three connections correspond to the three spaces in the three-format sample box 8 respectively. The three connections of the first gas guide pipe 10 are all provided with air inlet electric control valves 14.

[0023] As shown, the first gas guide pipe 10 has three connections with the gas baffle 81, and the three connections correspond to the three spaces in the three-format sample box 8 respectively. The three connections of the first gas guide pipe 10 are all provided with air inlet electric control valves 14. Figure 2 As shown, the first gas guide pipe 10 has three connections with the gas baffle 81, and the three connections correspond to the three spaces in the three-format sample box 8 respectively. The three connections of the first gas guide pipe 10 are all provided with air inlet electric control valves 14.

[0024] After the detection personnel obtain sufficient coal seam samples with different layers, the detection personnel uses the coal bed gas outlet amount detection experimental device, takes out the three-format sample box 8 from the sample chamber 3, and puts the classified samples into different grids of the three-format sample box 8. At the beginning, the bottom of the gas baffle 81 has a certain distance from the top of the three-format sample box 8, which is convenient for pushing the three-format sample box 8. The detection personnel pushes the three-format sample box 8 back into the sample chamber 3. The wedge-shaped block 11 connected to the inner side of the three-format sample box 8 presses down the gas baffle 81 in the pushing process, and the spring 12 connected to the top end of the inner side of the gas baffle 81 and the sample chamber 3 is stretched until the three-format sample box 8 is completely pushed back into the sample chamber 3. At this time, the lower end of the gas baffle 81 completely contacts the top end of the three-format sample box 8, and airtight space is formed between the gas baffle 81 and the three-format sample box 8. The plane at the bottom rear side of the wedge-shaped block 11 abuts against the upper end of the gas baffle 81 to prevent the gas baffle 81 from being pulled open upward by the spring 12. Then the detection personnel starts the air pump 1, and the air pump 1 guides the inert gas into the three-format sample box 8 through the first gas guide pipe 10 connected with the gas baffle 81. At the same time, the detection personnel operates the temperature controller 2 to control the temperature in the three-format sample box 8. The filling of the inert gas increases the internal pressure of the three-format sample box 8, and cooperates with the temperature control of the temperature controller 2. The detection personnel controls the first grid electric control valve 9 to be opened. The inert gas guides the coal bed gas out of the first grid electric control valve 9 to the top end of the gas baffle 81. At this time, the vacuum pump 4 is started, and the vacuum pump 4 guides the gas sample into the chromatograph 5 system through the second gas guide pipe 101. The sample gas is separated by the chromatograph 5, and then the sample gas is guided into the gas collection tank 6 through the third gas guide pipe 102. At this time, the detection personnel can check whether the gas in the gas collection tank 6 reaches the upper limit of the gas collection tank 6 through the instrument panel 7 connected to the top end of the gas collection tank 6.

[0025] After waiting for the gas to be completely collected, the first grid electric control valve 9 is closed, the second grid electric control valve 91 is opened by the detection personnel, and the operation of the first grid electric control valve 9 is repeated, after waiting for the gas corresponding to the second grid electric control valve 91 to be collected, the third grid electric control valve 92 is opened by the detection personnel, and the operation of the first grid electric control valve 9 is repeated, after waiting for the gas corresponding to the third grid electric control valve 92 to be detected and collected, the gas pump 1 and the temperature controller 2 are closed by the detection personnel, after waiting for the temperature and the air pressure in the three-format sample box 8 to return to the initial state, the three-format sample box 8 is extracted again by the detection personnel, at this time, the wedge-shaped block 11 is also extracted together, the stretched spring 12 is contracted, and the gas baffle 81 is slidably lifted, finally, after the detection personnel pour out the waste after reaction and properly handle, new samples are added again and the above process is repeated.

[0026] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coal bed gas production rate detection experiment device, characterized by, The utility model relates to a kind of gas chromatography, including air pump (1), temperature controller (2), sample chamber (3), vacuum pump (4), chromatograph (5), gas collecting tank (6), instrument panel (7), second gas guide pipe (101), third gas guide pipe (102), first gas guide pipe (10), three format sample box (8), gas baffle (81), No. 1 grid electric control valve (9), No. 2 grid electric control valve (91) and No. 3 grid electric control valve (92), air pump (1) is connected on the left side of sample chamber (3), temperature controller (2) is embeddedly connected on sample chamber (3), vacuum pump (4) is connected at the top of sample chamber (3), sample chamber (3) inside slide type connection three format sample box (8), vacuum pump (4) top connection second gas guide pipe (101), second gas guide pipe (101) right side connection chromatograph (5), chromatograph (5) right side connection third gas guide pipe (102), gas collecting tank (6) is connected in second gas guide pipe (101) lower end, gas collecting tank (6) top connection instrument panel (7), gas baffle (81) is slidably connected in sample chamber (3), first gas guide pipe (10) one end is connected in the top of gas baffle (81), first gas guide pipe (10) other end connection air pump (1), No. 1 grid electric control valve (9), No. 2 grid electric control valve (91) and No. 3 grid electric control valve (92) are arrayed and connected in the top of gas baffle (81), No. 1 grid electric control valve (9), No. 2 grid electric control valve (91) and No. 3 grid electric control valve (92) correspond three spaces in three format sample box (8) respectively.

2. The coal bed gas production rate detection experimental device according to claim 1, characterized in that: Still including wedge block (11) and spring (12), three format sample box (8) inside front end is connected wedge block (11), wedge block (11) bottom is equipped with slope, when three format sample box (8) is pushed into sample chamber (3), wedge block (11) is pressed down by slope gas baffle (81) and is contacted with three format sample box (8) upper end, spring (12) is connected with gas baffle (81) in sample chamber (3) inside upper end.

3. The coal bed gas production rate detection experimental device according to claim 2, characterized in that: Still including safety valve (61), safety valve (61) is connected on third gas guide pipe (102).

4. The coal bed gas production rate detection experimental device according to claim 3, characterized in that: The first gas guide pipe (10) bottom end has three junctions with gas baffle (81), three junctions correspond three spaces in three format sample box (8) respectively, and air inlet electric control valve (14) is installed in the three junctions of first gas guide pipe (10).

5. The coal bed gas production rate detection experimental device according to claim 4, characterized by: Still including sealing gasket (13), sealing gasket (13) is connected in three format sample box (8) inside front end.

6. The coal bed gas production rate detection experimental device according to claim 5, characterized by: Still including support frame (15), chromatograph (5) lower end is equipped with support frame (15).

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