A gas backflow test device based on the self-opening of tunnel network protrusions

Abstract

The present invention discloses a gas backflow test device based on the self-opening of the protruding port of the lane network, comprising a bracket, a gas tank and a high-frequency pressure shock wave sensor, a gas tank is fixed on the bracket, and the output end of the gas tank is connected to the protruding box through a high-pressure gas pipe, and a valve is installed on the high-pressure gas pipe, a pressure relief box is installed through one end of the protruding box, a protruding port is opened between the pressure relief box and the protruding box, a retractable groove is opened at the bottom of the pressure relief box, and the shaft in the retractable groove is connected to an extrusion plate, a telescopic groove is opened on the outside of the extrusion plate, an electric push rod is connected to the shaft in the retractable groove, and a dust collection component is installed at one end of the lane pipe. The gas backflow test device based on the self-opening of the protruding port of the lane network can complete the automatic opening of the protruding port, improve the gas protrusion simulation effect, and at the same time, the device is shock-absorbing and buffered to increase the service life.

Description

Technical Field

[0001] The invention relates to the technical field of gas backflow testing, in particular to a gas backflow testing device based on the self-opening of a tunnel network protrusion. Background Art

[0002] When gas is produced in a mine, gas backflow may sometimes occur. During the development of a gas outburst, a large amount of gas that suddenly gushes out can not only form a high-pressure gas airflow, but also form air shock waves at the forefront of the outburst. In order to evaluate the overpressure of the shock wave on the underground anti-outburst damper and ventilation facilities, as well as the lethal effect on personnel, a gas backflow test is required. However, the existing gas backflow test device has the following problems when used:

[0003] When conducting a gas backflow burst experiment, it is usually necessary to ensure that the burst port is opened and closed. In the existing gas backflow test device, the operator opens and closes the burst port manually, which is slow and inconvenient to automatically open and close the burst port, which will affect the burst strength and cause deviations in the experimental data. At the same time, when the baffle at the burst port is subjected to force impact, the existing gas backflow test device lacks buffering protection for the baffle, which makes it easy to be damaged, reduces its service life, and requires replacement, which is time-consuming and labor-intensive.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original gas countercurrent test device. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas backflow test device based on the self-opening of the tunnel network protrusion, comprising a bracket, a gas tank and a high-frequency pressure shock wave sensor, wherein the bracket is fixed with a gas tank, and the output end of the gas tank is connected to the protrusion box through a high-pressure gas pipe, and a valve is installed on the high-pressure gas pipe, a pressure relief box is installed through one end of the protrusion box, and a tunnel pipe is connected to one end of the pressure relief box by a flange, and a high-frequency pressure shock wave sensor is fixed on the tunnel pipe, and a pressure gauge is installed on the pressure relief box, and the pressure relief box is connected to the protrusion box by a flange. A protruding opening is opened between the outlet box body, and the shaft in the pressure relief box is connected to a baffle, and the baffle is located on the inner side of the protruding opening, a collecting groove is opened at the bottom inside the pressure relief box, and the shaft in the collecting groove is connected to an extrusion plate, a telescopic groove is opened on the outer side of the extrusion plate, and a telescopic rod is connected in the telescopic groove through a spring, and a buffer plate is fixed at one end of the telescopic rod, and the buffer plate is located on the outer side of the baffle, an electric push rod is connected to the shaft in the collecting groove, and one end of the electric push rod is located in the guide groove, and the guide groove is opened on the outer side of the extrusion plate, and a dust collection assembly is installed at one end of the lane pipe.

[0006] Preferably, the size of the protruding box body 4 is 300 mm×300 mm×500 mm, and the main body of the protruding box body 4 is mainly composed of a steel pipe with a wall thickness of 10 mm.

[0007] Preferably, the baffle is rotatably connected to the pressure relief box, and magnetic strips are fixed on the top edge of the baffle and the inner wall of the pressure relief box, and the top edge of the baffle and the magnetic strips on the inner wall of the pressure relief box are magnetically attracted to each other.

[0008] Preferably, the telescopic rod forms an elastic sliding structure between the spring and the telescopic slot, and there are two groups of telescopic rods distributed at equal intervals with respect to the buffer plate.

[0009] Preferably, the end of the electric push rod is designed as a spherical structure, and the end of the electric push rod is slidably connected to the guide groove, and the diameter of the end of the electric push rod is equal to the inner diameter of the guide groove.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the gas countercurrent test device based on the self-opening of the tunnel network protrusion;

[0011] 1. The end of the electric push rod is a spherical structure and slides in the guide groove, so that the electric push rod can push the rotation of the extrusion plate through the guide groove, and the baffle is automatically pushed to the protruding opening through the extrusion plate. With the use of the baffle and the magnetic strip in the pressure relief box, when the electric push rod drives the extrusion plate to return to its original position, the baffle can still cover the protruding opening, which is convenient for automatic control of the opening and closing of the protruding opening, and improves the accuracy of the experiment;

[0012] 2. An elastic sliding structure is formed between the telescopic rod and the telescopic slot through the spring. When the baffle at the protruding mouth falls back quickly due to impact, it contacts the buffer plate. The buffer plate slides elastically in the telescopic slot through the telescopic rod and the spring, thereby providing buffering protection for the baffle, avoiding damage and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a top-view cross-sectional structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the front cross-section structure of the pressure relief box of the present invention;

[0015] Figure 3 This is a schematic diagram of the front cross-section structure of the protruding box body of the present invention;

[0016] Figure 4 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0017] Figure 5 It is a schematic diagram of the cross-sectional structure of the pressure relief box of the present invention from top view.

[0018] In the figure: 1. bracket; 2. gas tank; 3. high-pressure gas pipe; 4. protruding box; 5. valve; 6. pressure relief box; 7. tunnel pipe; 8. high-frequency pressure shock wave sensor; 9. pressure gauge; 10. protruding mouth; 11. baffle; 12. magnetic strip; 13. retractable groove; 14. extrusion plate; 15. telescopic groove; 16. spring; 17. telescopic rod; 18. buffer plate; 19. electric push rod; 20. guide groove; 21. dust suction component. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5 The present invention provides a technical solution: a gas backflow test device based on the self-opening of the tunnel network protrusion, comprising a bracket 1, a gas tank 2, a high-pressure gas pipe 3, a protruding box 4, a valve 5, a pressure relief box 6, a tunnel pipe 7, a high-frequency pressure shock wave sensor 8, a pressure gauge 9, a protruding port 10, a baffle 11, a magnetic strip 12, a retractable groove 13, an extrusion plate 14, a telescopic groove 15, a spring 16, a telescopic rod 17, a buffer plate 18, an electric push rod 19, a guide groove 20 and a dust suction component 21, a gas tank 2 is fixed on the bracket 1, and the output end of the gas tank 2 is connected to the protruding box 4 through the high-pressure gas pipe 3, and the high-pressure gas pipe 3 is installed with a valve 5, one end of the protruding box 4 is penetrated and installed with a pressure relief box 6, and one end of the pressure relief box 6 is flange-connected to the tunnel pipe 7, and the tunnel pipe 7 is fixed with a gas tank 2. A high-frequency pressure shock wave sensor 8 is provided, and a pressure gauge 9 is installed on the pressure relief box 6. A protruding port 10 is provided between the pressure relief box 6 and the protruding box body 4, and a baffle 11 is connected to the inner axis of the pressure relief box 6, and the baffle 11 is located on the inner side of the protruding port 10. A storage groove 13 is provided at the bottom of the pressure relief box 6, and an extrusion plate 14 is connected to the inner axis of the storage groove 13, and a telescopic groove 15 is provided on the outer side of the extrusion plate 14, and a telescopic rod 17 is connected to the telescopic groove 15 through a spring 16, and a buffer plate 18 is fixed to one end of the telescopic rod 17, and the buffer plate 18 is located on the outer side of the baffle 11, an electric push rod 19 is connected to the inner axis of the storage groove 13, and one end of the electric push rod 19 is located in a guide groove 20, and the guide groove 20 is provided on the outer side of the extrusion plate 14, and a dust collection component 21 is installed at one end of the lane pipe 7;

[0021] The size of the protruding box 4 is 300mm×300mm×500mm, and the main part of the protruding box 4 is mainly composed of a steel pipe with a wall thickness of 10mm, so that the protruding box 4 can sufficiently withstand the pressure of gas, which is convenient for realistically reproducing gas outbursts;

[0022] The baffle 11 is rotatably connected to the pressure relief box 6, and a magnetic strip 12 is fixed on the top edge of the baffle 11 and the inner wall of the pressure relief box 6, and the top edge of the baffle 11 and the magnetic strip 12 on the inner wall of the pressure relief box 6 are magnetically attracted to each other. By using the magnetic strip 12, when the baffle 11 is rotated to the protruding opening 10, the protruding opening 10 can be closed;

[0023] The telescopic rod 17 forms an elastic sliding structure between the spring 16 and the telescopic slot 15, and there are two groups of telescopic rods 17 with equal spacing about the buffer plate 18. When the baffle plate 11 is quickly squeezed and rotated to the bottom by the gas pressure, the baffle plate 11 contacts the buffer plate 18, so that the telescopic rod 17 in the buffer plate 18 slides in the telescopic slot 15. With the use of the spring 16, the baffle plate 11 and the buffer plate 18 are protected to prevent the baffle plate 11 from being easily damaged by too much impact force.

[0024] The end of the electric push rod 19 is designed as a spherical structure, and the end of the electric push rod 19 is slidably connected to the guide groove 20, and the diameter of the end of the electric push rod 19 is equal to the inner diameter of the guide groove 20. When the electric push rod 19 pushes the extrusion plate 14 to rotate in the retracting groove 13, the top of the electric push rod 19 slides in the guide groove 20, which can realize the stable rotation of the extrusion plate 14 in the retracting groove 13, and then the baffle 11 is squeezed and closed by the extrusion plate 14, and at the same time, when the extrusion plate 14 rotates into the retracting groove 13, the baffle 11 has room for movement.

[0025] Working principle: When using the gas backflow test device based on the self-opening of the tunnel network protrusion, Figure 1-3 In the process, the gas tank 2, the protruding box 4 and the tunnel pipe 7 are first fixed on the bracket 1 through flange connection in sequence. When in use, the gas is transported to the protruding box 4 through the gas tank 2 and the high-pressure gas pipe 3 and controlled by the valve 5. At the same time, the gas in the protruding box 4 is tested for pressure by the pressure gauge 9. At the same time, the dust layer in the tunnel pipe 7 can be sucked out by the dust suction component 21 to keep the interior clean.

[0026] Then, if Figure 1-2 and Figure 4-5In the experiment, before the experiment, the electric push rod 19 in the receiving groove 13 at the bottom of the pressure relief box 6 is started, and the end of the electric push rod 19 slides in the guide groove 20 to push the extrusion plate 14 to rotate upward in the receiving groove 13. The buffer plate 18 on one side of the extrusion plate 14 contacts the baffle 11, driving the baffle 11 to rotate upward in the pressure relief box 6 until the baffle 11 is completely rotated to the protruding opening 10 and is fixed by the magnetic strip 12. When the experiment is carried out, the electric push rod 19 is started in the reverse direction. According to the above operation, the electric push rod 19 drives the extrusion plate 14 to rotate back in the receiving groove 13. At this time, under the action of the magnetic strip 12, the baffle 11 is still kept The protruding opening 10 is kept in place to be closed and shielded. When the pressure in the protruding box 4 continues to rise, the gas hits the baffle 11 through the protruding opening 10, causing the baffle 11 to rotate quickly and return to its original position. The gas quickly enters the tunnel pipe 7 from the pressure relief box 6, and the gas pressure is sensed and detected by the high-frequency pressure shock wave sensor 8. At the same time, when the baffle 11 quickly returns to its original position, the baffle 11 contacts the buffer plate 18, causing the telescopic rod 17 in the buffer plate 18 to slide in the telescopic groove 15. With the use of the spring 16, the baffle 11 and the buffer plate 18 are protected to prevent the baffle 11 from being easily damaged by excessive impact force, thereby completing an experimental test.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas backflow test device based on the self-opening of a tunnel network protrusion, comprising a bracket (1), a gas tank (2) and a high-frequency pressure shock wave sensor (8), characterized in that: A gas tank (2) is fixed on the bracket (1), and the output end of the gas tank (2) is connected to the protruding box (4) through a high-pressure gas pipe (3), and a valve (5) is installed on the high-pressure gas pipe (3). A pressure relief box (6) is installed through one end of the protruding box (4), and a roadway pipe (7) is flange-connected to one end of the pressure relief box (6), and a high-frequency pressure shock wave sensor (8) is fixed on the roadway pipe (7), and a pressure gauge (9) is installed on the pressure relief box (6). A protruding opening (10) is provided between the pressure relief box (6) and the protruding box (4), and a baffle (11) is connected to the inner shaft of the pressure relief box (6), and the baffle (11) is located on the inner side of the protruding opening (10). The bottom of the pressure relief box (6) is provided with a storage groove (13), and the storage groove (13) is connected to an extrusion plate (14) through an inner shaft, and the extrusion plate (14) is provided with a telescopic groove (15) on the outer side, and a telescopic rod (17) is connected to the telescopic groove (15) through a spring (16), and a buffer plate (18) is fixed to one end of the telescopic rod (17), and the buffer plate (18) is located on the outer side of the baffle (11), the storage groove (13) is connected to an electric push rod (19) through an inner shaft, and one end of the electric push rod (19) is located in a guide groove (20), and the guide groove (20) is provided on the outer side of the extrusion plate (14), and a dust collection component (21) is installed at one end of the tunnel pipe (7).

2. A gas backflow test device based on the self-opening of tunnel network protrusions according to claim 1, characterized in that: The size of the protruding box body (4) is 300 mm×300 mm×500 mm, and the main body of the protruding box body (4) is mainly composed of a steel pipe with a wall thickness of 10 mm.

3. A gas backflow test device based on the self-opening of tunnel network protrusions according to claim 1, characterized in that: The baffle plate (11) is rotatably connected to the pressure relief box (6), and magnetic strips (12) are fixed on the top edge of the baffle plate (11) and the inner wall of the pressure relief box (6), and the top edge of the baffle plate (11) and the magnetic strips (12) on the inner wall of the pressure relief box (6) are magnetically attracted to each other.

4. A gas backflow test device based on the self-opening of tunnel network protrusions according to claim 1, characterized in that: The telescopic rod (17) forms an elastic sliding structure with the telescopic slot (15) through the spring (16), and two groups of telescopic rods (17) are distributed at equal intervals with respect to the buffer plate (18).

5. A gas backflow test device based on the self-opening of tunnel network protrusions according to claim 1, characterized in that: The end of the electric push rod (19) is designed as a spherical structure, and the end of the electric push rod (19) is slidably connected to the guide groove (20), and the diameter of the end of the electric push rod (19) is equal to the inner diameter of the guide groove (20).

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