CN202204808U - Gas-solid coupling parameter tester for gas-containing gas - Google Patents

Abstract

The utility model discloses a gas-solid coupling parameter tester for coal containing gas, which is characterized in that the tester comprises an air supply unit, a vacuum pumping unit, a monitoring unit and a control unit; arranging a vacuumizing unit to pump air to the whole air path system, the rock mechanics experiment system and the coal sample, so that the whole system is in a vacuum state; an electromagnetic control valve is adopted to implement automatic monitoring control; measuring experimental parameters by adopting an output pressure transmitter and a displacement monitor; and a monitoring center, a computer and a printer are adopted to monitor and control the experimental parameters and output data. The utility model is used for testing the dynamic change of gas pressure in the coal sample in real time when mechanical pressure is exerted to the coal sample at rock mechanics experimental system, whole instrument adopts automatic control, simple structure, convenient operation.

Description

Gas-solid coupling parameter tester for gas-containing gas

technical field

The utility model relates to an instrument for testing gas-solid coupling parameters of gas-containing coal, in particular capable of realizing the dynamic testing of gas parameters of coal body materials containing easily adsorbed and desorbed gas gases under different stress states.

Background technique

At present, the instrument for testing gas-containing coal is to add a set of gas input devices to the rock mechanics experiment system. Before the experiment, the gas with rated gas pressure is injected into the rock mechanics experiment system to test the physical and mechanical properties of gas-containing coal, and the gas-containing coal is obtained. Parameters of physical and mechanical properties. However, the problems of this type of instrument are: first, there is air in the rock mechanics experiment system and the experimental coal sample, and the concentration of the input gas cannot be judged after the gas is input; second, after the gas is input, the gas is sealed in the rock mechanics experiment system, The gas pressure cannot be controlled; the third is that the dynamic change of the gas pressure cannot be tested when the rock mechanics experiment system applies mechanical pressure to the coal sample.

Utility model content

The utility model provides a gas-solid coupling parameter tester for avoiding the shortcomings of the above-mentioned prior art. On the one hand, the air in the rock mechanics experiment system can be extracted before the gas is input to ensure the concentration of the gas after input. It is accurate; on the other hand, the gas pressure can be precisely controlled after the gas is input, and the gas pressure can be measured in real time and dynamically monitored when the rock mechanics experiment system applies pressure to the coal sample.

The utility model adopts following technical scheme for solving technical problems:

The structural features of the utility model gas-solid coupling parameter tester containing gas are:

The gas supply unit is: the test gas output from the gas source is sequentially connected to the rock mechanics experiment system through the gas source valve, pressure reducing valve, input valve, electromagnetic control valve, regulating valve and output valve connected in series. in the sample chamber;

The vacuum unit is as follows: a vacuum pump and an air valve constitute a vacuum branch connected to the connecting pipeline between the input valve and the electromagnetic regulating valve;

The monitoring unit is: the output pressure gauge and the output pressure transmitter are connected in parallel and then connected to the connecting pipeline between the output valve and the rock mechanics experiment system; in the rock mechanics experiment system (18), the mechanical pressure push rod is provided with Displacement monitor;

The control unit is: setting a monitoring center controlled by a computer, and the electromagnetic regulating valve, the output pressure transmitter, and the displacement monitor interact with the signals of the monitoring center respectively.

The structural feature of the gas-solid coupling parameter tester containing gas of the utility model also lies in that the protection unit is set as follows: a buffer gas capacity is connected between the regulating valve and the output valve; and a protective gas capacity is connected in parallel on the extraction branch road.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model is equipped with a vacuum unit to pump air to the entire gas circuit system, rock mechanics experiment system and coal samples, so that the whole system is in a vacuum state; the electromagnetic control valve is used to implement automatic monitoring and control; the output pressure transmitter and The displacement monitor implements the measurement of the experimental parameters; the monitoring, control and data output of the experimental parameters are implemented by the monitoring center, computer and printer. The utility model is used to test the dynamic change of the gas pressure in the coal sample in real time when the rock mechanics experiment system applies mechanical pressure to the coal sample, and the whole instrument adopts automatic control, has a simple structure and is convenient to operate.

2. The utility model is especially suitable for testing the coupling parameters of coal materials containing gas that is easy to absorb and desorb gas, and uses the existing rock mechanics experiment system to realize dynamic gas pressure parameters of coal bodies that contain gas that is easy to adsorb and desorb gas under different stress states. test.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model system;

Labels in the figure: 1 air source; 2 air source valve; 3 vacuum pump; 4 exhaust valve; 5 pressure reducing valve; 6 input pressure gauge; 7 input valve; 8 protective gas capacity; 9, 10 electromagnetic control valve; 12 buffer gas capacity; 13 output pressure gauge; 14 output valve; 15 output pressure transmitter; 16 monitor; 17 displacement monitor; 18 rock mechanics experiment system; 19 computer; 20 printer.

Detailed ways

Referring to Fig. 1, the structural form of gas-solid coupling parameter tester containing gas in the present embodiment is:

The gas supply unit is: the test gas output from the gas source 1 is sequentially connected to the rock mechanics through the gas source valve 2, the pressure reducing valve 5, the input valve 7, the electromagnetic control valve 10, the regulating valve 11 and the output valve 14, which are connected in series. A gas source is provided for the coal sample loading experiment in the sample cavity in which the coal sample is placed in the experimental system 18;

The vacuum unit is: the vacuum pump 3 and the exhaust valve 4 constitute a vacuum branch connected to the connecting pipeline between the input valve 7 and the electromagnetic regulating valve 10;

The monitoring unit is: the output pressure gauge 13 and the output pressure transmitter 15 are connected in parallel and connected to the connecting pipeline between the output valve 14 and the rock mechanics experiment system 18; in the rock mechanics experiment system 18, the mechanical pressure push rod is provided with Displacement monitor 17;

The control unit is: a monitoring center 16 controlled by a computer 19 is set, and the electromagnetic regulating valve 9 , the output pressure transmitter 15 , and the displacement monitor 17 interact with the monitoring center 16 respectively. The computer 19 implements the measurement of the gas pressure and the axial strain dynamic parameters of the coal sample through the electromagnetic control output pressure transmitter 15, the displacement monitor 17 and the monitoring center 16.

In order to ensure the safety of the entire gas circuit system, the protection unit is set as follows: a buffer gas container 12 is connected between the regulating valve 11 and the output valve 14; a protective gas container 8 is connected in parallel on the air extraction branch; to prevent the gas pressure during the input gas process. Sudden increase damages the measuring instrument.

In the specific implementation, since the working pressure of the tester is 0-12MPa, it is required that the pressure resistance of the material of the entire gas circuit system is not less than 16Mpa; at the same time, it is required that the gas circuit system has good airtightness for 48 hours, zero gas leakage, and can meet the requirements of explosion-proof, Performance requirements of high temperature resistance and corrosion resistance.

experiment procedure:

Put the coal sample in the rock mechanics experiment system 18, close the input valve 7, open the output valve 14 and the exhaust valve 4, start the vacuum pump 3, put the coal sample and the whole gas path into the sample cavity of the rock mechanics experiment system 18 The system is vacuumed, and after the vacuuming is completed, close the exhaust valve 4 and the output valve 14, open the gas source valve 2, the pressure reducing valve 5, the input valve 7 and the regulating valve 11 to input gas for the experiment to the coal sample in the rock mechanics experiment system 18 Gas, when the gas pressure in the sample chamber is approximately equal to the coal sample pressure on site, close the input valve 7, start the monitoring center 16 and the computer 19, open the output valve 14, start the rock mechanics experiment system 18 to apply mechanical pressure to the coal sample, and pass The output pressure transmitter 15, the displacement monitor 17 and the monitoring center 16 implement the measurement of the dynamic parameters of the gas pressure and the axial strain of the coal sample, and output the printing results through the printer 20.

Claims (2)

1. Gas-solid coupling parameter tester for gas-containing gas, characterized by: The gas supply unit is: the test gas output from the gas source (1) passes through the gas source valve (2), the pressure reducing valve (5), the input valve (7), the electromagnetic control valve (10), and the regulating valve connected in series in sequence. (11) and output valve (14) are connected in the sample cavity that is placed with coal sample in the rock mechanics experiment system (18); The vacuum unit is: the vacuum pump (3) and the exhaust valve (4) constitute a vacuum branch and are connected to the connecting pipeline between the input valve (7) and the electromagnetic regulating valve (10); The monitoring unit is: the output pressure gauge (13) and the output pressure transmitter (15) are connected in parallel on the connecting pipeline between the output valve (14) and the rock mechanics experiment system (18); A displacement monitor (17) is arranged on the mechanical pressure push rod in the system (18); The control unit is: a monitoring center (16) controlled by a computer (19) is set, and the electromagnetic regulating valve (9), the output pressure transmitter (15), and the displacement monitor (17) communicate with the monitoring center (16) signal respectively. interact. 2. The gas-solid coupling parameter tester for gas-containing gas according to claim 1, characterized in that the protection unit is set as follows: a buffer gas capacity (12) is inserted between the regulating valve (11) and the output valve (14); A protective gas capacity (8) is connected in parallel on the air extraction branch.

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