Drill hole water inrush prevention valve

Abstract

A drilling water inrush prevention valve comprises a valve body, a barrel-shaped elastic valve element and the like. The valve body is fixed on a coal wall through a flange, the flange of the valve body is provided with a central through hole, a cylindrical elastic valve core is arranged in the valve body, an air tap device is arranged on the cylindrical valve core, and an air tap is connected with an air bottle through a pipe. The drill rod and the drill bit conduct drilling through the flange center hole and the cylindrical elastic valve element. The outburst prevention valve is reasonable in design, ingenious in structure and easy and convenient to operate, when a water accumulation area in a coal body is drilled, gas or liquid is filled into the cylindrical valve element, the valve element expands to be tightly attached to a drill rod, the valve is closed, a water gushing channel is closed, mine water is prevented from being jetted out to threaten field workers in an underground coal mine, and the safety of the underground coal mine is improved. And workers can rapidly evacuate from the site, the life safety of the workers is guaranteed, and potential safety hazards are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of coal mine drilling equipment, in particular to a drilling water inrush prevention valve. Background Art

[0002] During coal mining operations, there may be water or gas accumulation inside the coal seams or rock formations. In order to prevent coal mining accidents, workers generally use drilling rigs to drill holes in the coal wall or rock wall to detect whether there is water or gas accumulation that endangers safety in the coal or rock formations. During the above operation, the accumulated water or compressed gas in the coal seam continues to spray out from the drill hole under pressure. When the pressure of the accumulated water is high, there is a risk of water pressure injuring people or water flooding the working space and injuring people. The accumulated gas or the presence of flammable or toxic gases is not conducive to the safe evacuation of the workers from the site, and there are safety hazards. There is currently a lack of corresponding solutions to the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a drilling anti-water burst valve that can prevent water burst and air flow overflow after drilling, help workers to quickly close the water gushing channel and quickly evacuate the scene, effectively reduce safety hazards, and ensure the personal safety of workers.

[0004] The device includes an assembly substrate, which is the assembly base of the device and is packaged outside the borehole coal wall in the form of anchoring when in use;

[0005] The assembly base plate is provided with a drill rod through hole A;

[0006] A valve body is fixedly arranged on the outside of the assembly substrate, and the valve body is in the form of a sleeve, and a central through hole is respectively opened on the front and rear of the valve body;

[0007] A cylindrical elastic valve core is arranged in the valve body; the cylindrical elastic valve core is in the form of a cylindrical air bag, and a transparent arrangement is arranged in the middle position thereof, which is a drill rod through hole B;

[0008] An air nozzle is arranged on the cylindrical elastic valve core, and the air nozzle is arranged through the outer wall of the valve body;

[0009] The gas nozzle is connected to the gas cylinder through an air pipe.

[0010] The effect achieved in this way is that the drill rod of the drilling rig passes through the central through hole, drill rod through hole B and drill rod through hole A. After the hole is drilled through, if there is a sudden water or gas burst, the gas cylinder is opened to allow the cylindrical elastic valve core to expand rapidly, and cooperate with the drill rod to form a seal on the valve body, thereby preventing sudden gas or water bursts and ensuring that personnel can quickly evacuate the scene.

[0011] The beneficial effects of the utility model are: the overall structure of the device is ingenious, the operation is simple, it helps the staff to quickly close the water channel and quickly evacuate the site, which can effectively reduce safety hazards and ensure the personal safety of the staff. On this basis, the equipment has low cost, low operating conditions, and is more safe and worth promoting. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a drill hole anti-water inrush valve according to the utility model;

[0013] Figure 2 is based on Figure 1 Partial cross-section of the viewing angle;

[0014] Reference numerals:

[0015] 1-Assembly base plate 2-Coal wall 3-Valve body 4-Cylinder-type elastic valve core 5-Gas nozzle 6-Drill rod 7-Drilling rig 8-Gas pipe 9-Gas cylinder 10-Quick connector 11-Manual control valve 12-Control valve

[0016] 101-drill rod through hole A 401-drill rod through hole B

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] Reference Figure 1 , Figure 2 The utility model discloses a borehole water inrush prevention valve, comprising an assembly substrate 1, which is the assembly basis of the device. When in use, the assembly substrate 1 is packaged outside the borehole coal wall 2 in the form of anchoring;

[0019] The assembly substrate 1 is provided with a drill rod through hole A101;

[0020] A valve body 3 is fixedly arranged on the outside of the assembly substrate 1. The valve body 3 is in the form of a sleeve, and a central through hole is respectively opened on the front and rear of the valve body 3.

[0021] A cylindrical elastic valve core 4 is arranged in the valve body 3; the cylindrical elastic valve core 4 is in the form of a cylindrical air bag, and a transparent arrangement is arranged in the center thereof, which is a drill rod through hole B401;

[0022] The cylindrical elastic valve core 4 is provided with an air nozzle 5, and the air nozzle 5 is provided through the outer wall of the valve body 3;

[0023] The gas nozzle 5 is connected to the gas cylinder 9 through the gas pipe 8 .

[0024] The effect achieved in this way is that the drill rod 6 of the drilling rig 7 passes through the central through hole, the drill rod through hole B401 and the drill rod through hole A101. After the hole is drilled through, if there is a sudden water or gas burst, the gas cylinder 9 is opened to allow the cylindrical elastic valve core 4 to expand rapidly, and cooperate with the drill rod 6 to form a seal with the valve body 3, thereby preventing sudden gas or water bursts and ensuring that personnel can quickly evacuate the scene.

[0025] Furthermore, the assembly substrate 1 is a flange.

[0026] Preferably, the assembly base plate 1 is anchored and fixed to the coal wall 2, and the flange and the coal wall 2 are sealed and packaged by colloids such as foam glue and sealant.

[0027] Furthermore, the gas cylinder 9 is provided with a quick connector 10, and the gas pipe 8 is connected to the gas cylinder 9 by plugging and unplugging;

[0028] A manual control valve 11 is provided between the air pipe 8 and the air nozzle 5 ; a control valve 12 is also provided on the air pipe 8 .

[0029] The manual control valve 11 is used to release gas and open the valve body 3 during subsequent construction.

[0030] Furthermore, the control valve 12 is linked to the electrical control circuit of the drilling rig 7 .

[0031] That is, the control valve 12 and the drilling rig 7 are in linkage, and the worker opens the control valve 12 and closes the drilling rig 7, and the gas cylinder 9 starts to inflate the cylindrical elastic valve core 4. That is, the worker opens the control valve 12 and the drilling rig 7 is closed in linkage, which saves operation time and prevents the rotation of the drill rod 6 from damaging the cylindrical elastic valve core 4, which is conducive to quickly blocking the water gushing channel, so that the worker has time to quickly leave the site.

[0032] Preferably, the distance between the drill rod 6 and the inner wall of the cylindrical elastic valve core 4 is 10 mm, and can be adjusted according to the size of the drill rod 6 .

[0033] In Embodiment 1, the gas cylinder 9 is a compressed air supply pipeline or an air compressor.

[0034] In Embodiment 2, the gas cylinder 9 is a hydraulic cylinder or a hydraulic pump station.

[0035] When in use, the staff fixes the valve body 3 on the coal wall 2 through the assembly base plate 1, and then uses the gas pipe 8 to connect the gas nozzle 5 and the gas cylinder 9. The gas cylinder 9 is preferably a pressurized gas cylinder, and the gas pressure of the gas cylinder 9 can be adjusted according to the estimated water pressure of the coal seam.

[0036] The staff adjusts the drill rig 7 and the drill rod 6 so that the drill rod 6 contacts the coal wall 2 by passing through the central through hole, the drill rod through hole B401 and the drill rod through hole A101 in sequence. The drill rig 7 is turned on and the drill rod 6 starts drilling to detect water. If there is water accumulation in the coal seam, the water will gush out from the borehole under the action of pressure. At this time, the staff opens the control valve 12 and simultaneously closes the drill rig 7 and immediately leaves the scene. The gas in the gas cylinder 9 rushes into the cylindrical elastic valve core 4 through the control valve 12. The cylindrical elastic valve core 4 expands and squeezes and fits the drill rod 6 to play a sealing role, thereby blocking the water gushing out of the borehole. At this time, the water in the coal seam will stop flowing out, waiting for the staff to carry out subsequent disposal.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A drilling water inrush prevention valve, comprising an assembly substrate, wherein a drill rod through hole A is provided on the assembly substrate; characterized in that: A valve body is fixedly arranged on the outside of the assembly substrate, and the valve body is in the form of a sleeve, and a central through hole is respectively opened on the front and rear of the valve body; A cylindrical elastic valve core is arranged in the valve body; the cylindrical elastic valve core is in the form of a cylindrical air bag, and a transparent arrangement is arranged in the middle position thereof, which is a drill rod through hole B; An air nozzle is arranged on the cylindrical elastic valve core, and the air nozzle is arranged through the outer wall of the valve body; The gas nozzle is connected to the gas cylinder through an air pipe.

2. A drilling water inrush prevention valve according to claim 1, characterized in that: The assembly base plate is a flange.

3. A drilling water inrush prevention valve according to claim 1, characterized in that: The gas cylinder is provided with a quick connector, and the air pipe is connected to the gas cylinder by plugging and unplugging; A manual control valve is arranged between the air pipe and the air nozzle; a control valve is also arranged on the air pipe.

4. A drilling water inrush prevention valve according to claim 3, characterized in that: The control valve is linked to the drilling rig electrical control circuit.

5. A drill hole water inrush prevention valve according to claim 1, characterized in that: The gas cylinder is a compressed air supply pipeline, or an air compressor.

6. A drill hole water inrush prevention valve according to claim 1, characterized in that: The gas cylinder is a hydraulic cylinder or a hydraulic pump station.

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