Improved gas dust explosion pipeline test device

Abstract

The utility model discloses an improved gas dust explosion pipeline testing device in the technical field of gas dust explosion testing, which comprises an explosion ignition assembly and a data acquisition control assembly, the other side of the explosion ignition assembly is respectively provided with a dust spraying assembly and a product collecting assembly, and the product collecting assembly comprises a closed control valve. The side, away from the explosion ignition assembly, of the closed control valve is connected with a gas taking control valve and a vacuumizing control valve, the end, away from the closed control valve, of the gas taking control valve is sequentially connected with a dust collector and an air bag, and the end, away from the closed control valve, of the vacuumizing control valve is connected with a vacuum pump. According to the utility model, the closed control valve, the gas taking control valve, the dust collector, the air bag, the vacuumizing control valve and the vacuum pump are arranged in a matched manner, so that gas can be collected by the air bag, powder can be collected by the dust collector, the problem that explosion gas and powder are difficult to automatically collect is solved, and the content of experimental research is widened.

Description

Technical Field

[0001] This utility model relates to the technical field of gas dust explosion testing, and in particular to an improved gas dust explosion pipeline testing device. Background Technology

[0002] In order to improve basic research on gas explosions, basic research on accident investigation evidence analysis, and research on gas and dust explosion suppression, many scholars have conducted systematic explosion experiments on gas and coal dust of different concentrations using laboratory instruments. Among them, the pipeline explosion test device has been the most studied.

[0003] When conducting coal dust explosion experiments or gas dust suppression experiments, it is necessary to perform industrial and elemental analysis on the coal samples before the experiment. After the explosion test, samples of the reacted powder and gas are taken for analysis to better understand the explosion or suppression process involving coal dust, which is helpful for accident investigation. Currently, the main methods for collecting powder in laboratory pipelines are: one is to open the top cover of the sphere after the experiment and collect it with a small vacuum cleaner; the other is to discharge it along with the gas through a compressor, but this often causes blockage of the compressor pipes or powder entering the pump and damaging the machine. Furthermore, when studying the suppression effect of halogenated explosion suppressants, the explosion products contain toxic gases such as hydrofluoric acid and hydrochloric acid, and improper discharge methods can harm operators. Utility Model Content

[0004] In order to improve the problem that the explosion products of the existing devices mentioned above contain toxic gases such as hydrofluoric acid and hydrochloric acid, and improper exhaust methods may cause harm to operators, this utility model provides an improved gas dust explosion pipeline test device.

[0005] This utility model provides an improved gas dust explosion pipeline testing device, which adopts the following technical solution:

[0006] An improved gas dust explosion pipeline testing device includes an explosion ignition component and a data acquisition and control component. A gas supply component is provided on one side of the explosion ignition component, and a dust spraying component and a product collection component are respectively provided on the other side of the explosion ignition component. The product collection component includes a closed control valve. A gas intake control valve and a vacuum control valve are respectively connected to the side of the closed control valve away from the explosion ignition component. A dust collector and an air bag are sequentially connected to the end of the gas intake control valve away from the closed control valve. A vacuum pump is connected to the end of the vacuum control valve away from the closed control valve.

[0007] By adopting the above technical solution, the closed control valve, vacuum control valve, and vacuum pump are opened to extract the air from the explosion tube and release it into the atmosphere. After extraction, the closed control valve, vacuum control valve, and vacuum pump are closed. At this time, a certain concentration of premixed gas is injected into the explosion ignition assembly through the gas supply assembly. The dust ignition action is automatically controlled by the data acquisition and control assembly. After the explosion is completed, the closed control valve, gas intake control valve, and dust collector are opened, and the powder is discharged into the dust storage collector. The gas is collected into the gasbag. After complete extraction, the closed control valve, gas intake control valve, and dust collector are closed. Finally, the gas in the gasbag and the powder in the dust collector are detected and analyzed. This allows for non-contact collection of gas and powder, solving the problem of the difficulty in automatically collecting explosive gas and powder.

[0008] Optionally, the explosion ignition assembly includes an explosion tube, an explosion top cover installed on the top of the explosion tube, an explosion cap installed on the bottom of the explosion top cover, an ignition electrode installed on the top of the explosion cap, an ignition controller connected to the end of the ignition electrode away from the explosion top cover, and an input terminal of the ignition controller connected to a data acquisition and control assembly.

[0009] By adopting the above technical solution, the explosion top cover is opened to check that the inside of the explosion tube is clean and free of residue. The ignition delay time of the ignition controller is set by the data acquisition and control component, and the ignition action is fully automatic through the cooperation of the ignition electrodes.

[0010] Optionally, the ignition electrode is composed of two tungsten wires with a thickness of 5 mm.

[0011] By adopting the above technical solution, tungsten has a melting point as high as 3410℃, which allows the tungsten wire to remain stable at extremely high temperatures and not easily melt. During the ignition process, the tungsten wire is heated to a high temperature by the action of electric current, thereby igniting the combustible gas and ensuring the reliability and stability of ignition.

[0012] Optionally, glass viewing windows are installed at both ends of the explosive tube.

[0013] By adopting the above technical solution, it is convenient for high-speed cameras to record the flame inside the explosion tube through the glass viewing window.

[0014] Optionally, the dust spraying assembly includes a dust storage control start valve located at the bottom of the explosion tube. The end of the dust storage control start valve away from the explosion tube is connected to a dust storage tank. A second pressure sensor is installed on the dust storage tank. The end of the dust storage tank away from the dust storage control start valve is sequentially connected to an inflation control valve, a flow regulating valve, and a compressed air cylinder. The dust storage control start valve, the dust storage tank, and the inflation control valve are respectively connected to a data acquisition and control assembly.

[0015] By adopting the above technical solution, the gas in the dust storage tank and the explosion tube is connected. The inflation control valve and the flow regulating valve are opened to pressurize the dust storage tank. The pressure in the dust storage tank is detected by a second pressure sensor. When the reading of the second pressure sensor reaches a predetermined value, the inflation control valve and the flow regulating valve are closed.

[0016] Optionally, the gas supply assembly includes two gas storage cylinders, and the tops of the two gas storage cylinders are sequentially connected to a flow control valve, an inlet control valve, and a shut-off valve, which are respectively connected to the data acquisition and control assembly.

[0017] By adopting the above technical solution, it is possible to provide a mixed gas into the explosion tube.

[0018] Optionally, the data acquisition and control component includes a data acquisition unit and a computer. The output terminal of the data acquisition unit is electrically connected to the input terminal of the computer. Several temperature sensors are installed at the left end inside the explosive tube, and several first pressure sensors are installed at the right end inside the explosive tube. The output terminals of the temperature sensors and the first pressure sensors are electrically connected to the input terminal of the data acquisition unit, respectively.

[0019] By adopting the above technical solution, the temperature value inside the explosion tube can be detected by the temperature sensor, the pressure inside the explosion tube can be detected by the first pressure sensor, and the data values ​​can be transmitted to the computer through the data acquisition device.

[0020] Optionally, the dust collector includes a collection shell, an air inlet at one end of the collection shell near the air intake control valve, an air outlet at one end of the collection shell near the air bladder, a dust storage box at the bottom of the collection shell, a filter cloth at the end of the collection shell near the dust storage box, a movable column passing through the right end of the collection shell, the left end of the movable column extending into the interior of the collection shell and fitted with a rubber elastic diaphragm, and metal balls inside both the air inlet and the air outlet.

[0021] By adopting the above technical solution, when the rubber elastic diaphragm is closed, the airflow is blocked and the dust is sucked into the collection shell. When the rubber elastic diaphragm is open, the airflow passes through, and under the filtration of the filter cloth, the powder is discharged into the interior of the powder storage box, and the gas is collected into the interior of the air bladder. Finally, the powder storage box is removed, and the gas in the air bladder and the powder in the powder storage box are detected and analyzed. This allows for non-contact collection of gas and powder. The metal ball can effectively prevent larger particles or foreign objects from entering the interior of the collection shell, avoiding blockage inside the collection shell.

[0022] In summary, this utility model has at least one of the following beneficial effects:

[0023] By coordinating a closed control valve, a gas intake control valve, a dust collector, an airbag, a vacuum control valve, and a vacuum pump, the device can collect gas through the airbag and powder through the dust collector, enabling contactless collection. This solves the problem of the difficulty in automatically collecting explosive gases and powders and broadens the scope of experimental research.

[0024] The coordinated design of the gas supply assembly, ignition controller, explosion cap, ignition electrode, explosion tube, explosion top cover, dust spray assembly, and data acquisition and control assembly makes the experimental operation convenient and safe, and suitable for explosion experimental research on different particulate matter. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the dust collector structure of this utility model.

[0028] In the diagram: 1. Gas supply assembly; 101. Gas cylinder; 102. Flow control valve; 103. Inlet control valve; 104. Closing valve; 2. Explosion ignition assembly; 201. Ignition controller; 202. Explosion cap; 203. Ignition electrode; 204. Explosion tube; 205. Explosion top cover; 206. Glass viewing window; 3. Temperature sensor; 4. First pressure sensor; 5. Dust spray assembly; 501. Dust storage control start valve; 502. Dust storage tank; 503. Second pressure sensor; 504. Gas filling control valve; 505. Flow regulating valve; 506, compressed gas cylinder; 6, product collection assembly; 601, shut-off control valve; 602, gas intake control valve; 603, dust collector; 6031, collection shell; 6032, metal ball; 6033, air inlet; 6034, powder storage box; 6035, filter cloth; 6036, rubber elastic diaphragm; 6037, movable column; 6038, air outlet; 604, air bag; 605, vacuum control valve; 606, vacuum pump; 7, data acquisition and control assembly; 701, data acquisition unit; 702, computer. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0030] Please refer to the attached diagram in the instruction manual. Figure 1 This utility model provides an embodiment of an improved gas dust explosion pipeline testing device, comprising an explosion ignition assembly 2 and a data acquisition and control assembly 7. A gas supply assembly 1 is disposed on one side of the explosion ignition assembly 2. The explosion ignition assembly 2 includes an explosion tube 204, an explosion top cover 205 mounted on the top of the explosion tube 204, an explosion cover 202 mounted on the bottom of the explosion cover 202, and an ignition electrode 203 mounted on the top of the explosion cover 202. The end of the ignition electrode 203 away from the explosion top cover 205 is connected to an ignition controller 201, and the input terminal of the ignition controller 201 is connected to the data acquisition and control assembly 7. By opening the explosion top cover 205, the inside of the explosion tube 204 is checked to be clean and free of residue. The ignition delay time of the ignition controller 201 is set by the data acquisition and control assembly 7, and the ignition action is fully automatic with the cooperation of the ignition electrode 203.

[0031] Please refer to the attached diagram in the instruction manual. Figure 1 The ignition electrode 203 consists of two tungsten wires, each 5mm in diameter. Tungsten has a melting point as high as 3410℃, which allows the tungsten wires to remain stable at extremely high temperatures and resist melting. During ignition, the tungsten wires are heated to a high temperature by an electric current, thereby igniting the combustible gas and ensuring the reliability and stability of ignition. Glass viewing windows 206 are installed at both ends of the explosion tube 204. This allows a high-speed camera to record the flame inside the explosion tube 204 through the glass viewing windows 206.

[0032] Please refer to the attached diagram in the instruction manual. Figure 1 The gas supply assembly 1 includes two gas cylinders 101. A flow control valve 102, an inlet control valve 103, and a shut-off valve 104 are sequentially connected to the top of each gas cylinder 101. These valves are connected to the data acquisition and control assembly 7. This allows for the supply of a mixed gas into the explosion tube 204.

[0033] Please refer to the attached diagram in the instruction manual. Figure 1 The data acquisition and control component 7 includes a data acquisition unit 701 and a computer 702. The output terminal of the data acquisition unit 701 is electrically connected to the input terminal of the computer 702. Several temperature sensors 3 are installed at the left end inside the explosion tube 204, and several first pressure sensors 4 are installed at the right end inside the explosion tube 204. The output terminals of the temperature sensors 3 and the first pressure sensors 4 are electrically connected to the input terminal of the data acquisition unit 701, respectively. Thus, the temperature value inside the explosion tube 204 can be detected by the temperature sensors 3, and the pressure inside the explosion tube 204 can be detected by the first pressure sensors 4. The data values ​​are then transmitted to the data acquisition unit 702 via the data acquisition unit 701.

[0034] Please refer to the attached diagram in the instruction manual. Figure 1On the other side of the explosion ignition assembly 2, a dust spray assembly 5 and a product collection assembly 6 are respectively provided. The dust spray assembly 5 includes a dust storage control start valve 501, which is located at the bottom of the explosion tube 204. The end of the dust storage control start valve 501 away from the explosion tube 204 is connected to a dust storage tank 502. A second pressure sensor 503 is installed on the dust storage tank 502. The end of the dust storage tank 502 away from the dust storage control start valve 501 is connected in sequence to an inflation control valve 504, a flow regulating valve 505, and a compressed gas cylinder 506. The dust storage control start valve 501, the dust storage tank 502, and the inflation control valve 504 are respectively connected to the data acquisition and control assembly 7. The gas is connected between the dust storage tank 502 and the explosion tube 204. The gas filling control valve 504 and the flow regulating valve 505 are opened to pressurize the dust storage tank 502. The pressure inside the dust storage tank 502 is detected by the second pressure sensor 503. When the reading of the second pressure sensor 503 reaches the predetermined value, the gas filling control valve 504 and the flow regulating valve 505 are closed.

[0035] Please refer to the attached diagram in the instruction manual. Figure 1 The product collection assembly 6 includes a closed control valve 601. On the side of the closed control valve 601 away from the explosion ignition assembly 2, a gas intake control valve 602 and a vacuum control valve 605 are connected respectively. On the end of the gas intake control valve 602 away from the closed control valve 601, a dust collector 603 and an airbag 604 are connected in sequence. On the end of the vacuum control valve 605 away from the closed control valve 601, a vacuum pump 606 is connected.

[0036] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 2The dust collector 603 includes a collection shell 6031. An air inlet 6033 is provided at one end of the collection shell 6031 near the air intake control valve 602, and an air outlet 6038 is provided at one end of the collection shell 6031 near the air bag 604. A dust storage box 6034 is installed at the bottom of the collection shell 6031. A filter cloth 6035 is installed inside the collection shell 6031 near the dust storage box 6034. A movable column 6037 is inserted through the right end of the collection shell 6031. The left end of the movable column 6037 extends into the interior of the collection shell 6031 and is fitted with a rubber elastic diaphragm 6036. Metal balls 6032 are provided inside both the air inlet 6033 and the air outlet 6038. When the rubber elastic diaphragm 6036 is closed, the airflow is blocked, and the dust is drawn into the collection shell 6031. When the rubber elastic diaphragm 6036 is open, the airflow passes through, and under the filtration of the filter cloth 6035, the powder is discharged into the powder storage box 6034, and the gas is collected into the air bladder 604. Finally, the powder storage box 6034 is removed, and the gas in the air bladder 604 and the powder in the powder storage box 6034 are detected and analyzed. Non-contact collection of gas and powder is possible. The metal ball 6032 can effectively prevent larger particles or foreign objects from entering the collection shell 6031, avoiding blockage inside the collection shell 6031.

[0037] Working principle: When in use, open the explosion top cover 205, check that the inside of the explosion tube 204 is clean and free of residue, then tighten the explosion top cover 205. Then, control computer 702 closes all valves, unscrews dust storage tank 502, puts in an appropriate amount of powder, and tightens dust storage tank 502. Next, control computer 702 opens the sealing control valve 601, the vacuum control valve 605, and the vacuum pump 606 to extract the air from the explosion tube 204 and release it into the atmosphere. After extraction, close the sealing control valve 601, the vacuum control valve 605, and the vacuum pump 606.

[0038] At this time, the control computer 702 opens the flow control valve 102, the air intake control valve 103, and the closing valve 104 on the two gas cylinders 101 to fill the explosion tube 204 with a certain concentration of premixed gas. Then, it closes the flow control valve 102, the air intake control valve 103, and the closing valve 104. At the same time, it opens the filling control valve 504 and the flow regulating valve 505 to pressurize the dust storage tank 502. The pressure value is sensed by the second pressure sensor 503. When the reading of the second pressure sensor 503 reaches the predetermined value, the filling control valve 504 and the flow regulating valve 505 are closed.

[0039] The computer 702 is then controlled to set the ignition delay time of the ignition controller 201 and the opening time of the dust storage control start valve 501. The dust ignition action is automatically controlled. After the explosion, the closed control valve 601, the gas intake control valve 602, and the dust collector 603 are opened. When the rubber elastic diaphragm 6036 is closed, the airflow is blocked and the dust is sucked into the collection shell 6031. When the rubber elastic diaphragm 6036 is opened, the airflow passes through. Under the filtration of the filter cloth 6035, the powder is discharged into the powder storage box 6034, and the gas is collected into the airbag 604. After the air is completely pumped out, the closed control valve 601, the gas intake control valve 602, and the dust collector 603 are closed. Finally, the powder storage box 6034 is taken out, and the gas in the airbag 604 and the powder in the powder storage box 6034 are tested and analyzed. The experiment ends.

[0040] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An improved gas dust explosion pipeline testing device, comprising an explosion ignition assembly (2) and a data acquisition and control assembly (7), characterized in that: A gas supply assembly (1) is provided on one side of the explosion ignition assembly (2), and a dust spray assembly (5) and a product collection assembly (6) are provided on the other side of the explosion ignition assembly (2). The product collection assembly (6) includes a closed control valve (601). A gas intake control valve (602) and a vacuum control valve (605) are connected to the side of the closed control valve (601) away from the explosion ignition assembly (2). A dust collector (603) and an air bag (604) are connected in sequence to the end of the gas intake control valve (602) away from the closed control valve (601). A vacuum pump (606) is connected to the end of the vacuum control valve (605) away from the closed control valve (601).

2. The improved gas dust explosion pipeline test device according to claim 1, characterized in that: The explosion ignition assembly (2) includes an explosion tube (204), an explosion top cover (205) is installed on the top of the explosion tube (204), an explosion cover (202) is installed at the bottom of the explosion cover (202), an ignition electrode (203) is installed on the top of the explosion cover (202), and an ignition controller (201) is connected to the end of the ignition electrode (203) away from the explosion top cover (205). The input end of the ignition controller (201) is connected to the data acquisition and control assembly (7).

3. The improved gas dust explosion pipeline test device according to claim 2, characterized in that: The ignition electrode (203) is composed of two tungsten wires with a thickness of 5 mm.

4. An improved gas dust explosion pipeline testing device according to claim 2, characterized in that: The explosion tube (204) is equipped with glass viewing windows (206) at both the front and rear ends.

5. An improved gas dust explosion pipeline testing device according to claim 2, characterized in that: The dust spraying assembly (5) includes a dust storage control start valve (501), which is located at the bottom of the explosion tube (204). The end of the dust storage control start valve (501) away from the explosion tube (204) is connected to a dust storage tank (502). A second pressure sensor (503) is installed on the dust storage tank (502). The end of the dust storage tank (502) away from the dust storage control start valve (501) is connected in sequence to an inflation control valve (504), a flow regulating valve (505), and a compressed air cylinder (506). The dust storage control start valve (501), the dust storage tank (502), and the inflation control valve (504) are respectively connected to the data acquisition and control assembly (7).

6. An improved gas dust explosion pipeline testing device according to claim 1, characterized in that: The gas supply assembly (1) includes two gas storage cylinders (101). The top of the two gas storage cylinders (101) is connected in sequence to a flow control valve (102), an air intake control valve (103), and a shut-off valve (104). The flow control valve (102), the air intake control valve (103), and the shut-off valve (104) are respectively connected to the data acquisition and control assembly (7).

7. An improved gas dust explosion pipeline testing device according to claim 2, characterized in that: The data acquisition and control component (7) includes a data acquisition unit (701) and a computer (702). The output end of the data acquisition unit (701) is electrically connected to the input end of the computer (702). Several temperature sensors (3) are installed at the left end inside the explosion tube (204), and several first pressure sensors (4) are installed at the right end inside the explosion tube (204). The output ends of the temperature sensors (3) and the first pressure sensors (4) are electrically connected to the input end of the data acquisition unit (701).

8. An improved gas dust explosion pipeline testing device according to claim 1, characterized in that: The dust collector (603) includes a collection shell (6031), an air inlet (6033) at one end of the collection shell (6031) near the air intake control valve (602), an air outlet (6038) at one end of the collection shell (6031) near the air bag (604), a dust storage box (6034) installed at the bottom of the collection shell (6031), a filter cloth (6035) installed inside the collection shell (6031) near the dust storage box (6034), a movable column (6037) passing through the right end of the collection shell (6031), the left end of the movable column (6037) extending into the interior of the collection shell (6031) and installed with a rubber elastic diaphragm (6036), and metal balls (6032) provided inside both the air inlet (6033) and the air outlet (6038).

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