Blowout-prevention double-pre-drainage device for drainage drilling in high-gas area construction

Abstract

The utility model discloses a high gas area construction extraction drilling blowout prevention double-pre-extraction device, through a two-stage blowout prevention hole device, coal cinder and water can completely enter two box bodies, after entering the box bodies, gas is discharged into an extraction pipeline through an extraction opening, water and coal enter a water-coal separation box through the extraction opening, and the water-coal separation box is used for separating water and coal. A soft filter plate is installed in the blowout prevention hole device for protection and prevents most of gas and coal cinder from being directly sprayed out of a drill rod gap, an extraction opening and a water pumping opening of the two-stage device are installed on an extraction pipeline and a coal-water separation box respectively, and a first box body can stop most of gas and coal cinder; the second box body can prevent residual coal cinder and gas from entering the roadway, meanwhile, when the soft filter plate is replaced, the cover plate is rotated, the interior is replaced, the cover plate is connected through the snap spring hinge leaf, when the cover plate is not opened, the cover plate is tightly attached to the box body through the acting force of the snap spring, and meanwhile sealing is conducted through the sealing strip; the check valve and the one-way valve prevent gas and coal water from flowing back.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a double pre-extraction device for preventing blowout of drilling holes in construction and extraction in high-gas areas. Background Art

[0002] During the drilling process, especially in high-gas areas, blowouts often occur. At this time, the gas in the coal seam, together with coal slag and water, will quickly rush out of the borehole, causing personal injury and accidents such as excessive gas. When the gas is blown out, if it is not pumped out in time, the gas will overflow along the gap between the blowout prevention device and the drill pipe. If it is not effectively controlled and pumped out, it will cause the risk of explosion or fire, posing a serious threat to workers and equipment. The resulting safety accidents will cause work to stop, affecting the overall production progress and plan, increasing costs and delaying the construction period. Utility Model Content

[0003] The utility model aims to provide a double pre-extraction device for preventing blowout during construction of extraction drilling holes in high-gas areas, so as to solve the problem that gas together with coal slag and water will quickly rush out of the borehole, causing personal injury and accidents such as excessive gas, and at the same time, gas will overflow along the gap between the anti-blowout hole device and the drill rod.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double pre-extraction device for preventing blowout in drilling holes for extraction in high-gas areas, which is installed at the contact end of the drill rod and the coal wall, and includes two boxes, a cover plate, an air extraction port, and a water extraction port. The box includes a first box and a second box, and the box is a hollow shell with a rectangular opening upward. Blowout prevention holes are opened on the corresponding surfaces of the first box and the second box, and are connected by a flange plate, and a sealing ring is connected to the flange plate. The drill rod is inserted into the first box and the second box, and the drill rod passes through the first box and the second box and contacts the coal wall. A feed port is opened at the contact end of the first box and the coal wall, and a connection port is set at the contact end of the second box and the drill rod.

[0005] The top of the first box body and the second box body are pivotally connected with a cover plate through a retaining spring hinge fan, the cover plate is embedded in the first box body and the second box body, an air exhaust port is opened on the cover plate, the air exhaust port is connected to the gas extraction pipe, and the bottom of the first box body and the second box body is provided with a water extraction port, which is connected to the water-coal separation box pipeline.

[0006] Preferably, the contact end of the feed port and the coal wall is also provided with an obliquely extending arc plate, which is obliquely arranged with the feed port, and the other end is in conflict with the outer side of the drill pipe circumference, for collecting the fallen water coal and allowing the water coal to enter the first box.

[0007] Preferably, the connection port and the contact end of the drill pipe are also provided with an extension portion extending along an oblique line toward the outer circumference of the drill pipe, the extension portion is arranged in a cone shape, and the top end and the outer circumferential contact end of the drill pipe are sealed by an O-ring to prevent gas and water-coal from penetrating out.

[0008] Preferably, the anti-blowout orifice ends in the first box and the second box are both provided with soft filter plates, the soft filter plates are made of rubber, linkage holes are opened on the soft filter plates, and a drill rod is inserted into the linkage hole to reduce the gap between the drill rod and the anti-blowout orifice.

[0009] Preferably, a check valve is connected to the air suction port to control the gas flow and prevent backflow.

[0010] Preferably, a one-way valve is connected to the water pumping port to prevent the backflow of water and coal.

[0011] Preferably, a sealing strip is provided on the circumference of the contact end between the cover plate and the box body, so as to make the cover plate fit tightly with the first box body and the second box body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] Through the two-stage anti-blowout hole device, coal slag and water can all enter the box body. The box body is set to two. After entering the box body, the gas is discharged into the extraction pipeline through the air suction port, and the water-coal enters the water-coal separation box through the water suction port. A soft filter plate is installed inside the anti-blowout hole device for protection to block most of the gas and coal slag from directly spraying out from the gap of the drill rod. The air suction port and water suction port of the two-stage device are respectively installed on the extraction pipeline and the coal-water separation box. The first box body can block most of the gas and coal slag, and the second box body can prevent the remaining coal slag and gas from entering the tunnel. At the same time, when replacing the soft filter plate, the cover plate is rotated to replace the interior. The cover plate is connected via a retaining spring hinge fan. When it is not opened, it is tightly fitted to the box body through the force of the retaining spring, and is sealed by a sealing strip. The check valve and the one-way valve prevent the backflow of gas and water-coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the connection port structure of the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the spring hinge fan and the cover plate cooperating with each other in the utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the soft filter plate of the utility model.

[0018] In the figure: 1. first box body; 2. second box body; 3. cover plate; 4. spring hinge fan; 5. soft filter plate; 6. air suction port; 7. water suction port; 8. sealing strip; 9. check valve; 10. arc plate; 11. connection port; 12. one-way valve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1: Please refer to Figure 1-24. An embodiment of the utility model is: a double pre-extraction device for preventing blowout of drilling holes for construction and extraction in high-gas areas, which is installed at the contact end of the drill rod and the coal wall, and includes two boxes. The boxes are used to collect and separate the coal slag and water flushed out from the borehole, and prevent the gas from being sprayed out. At the same time, a safe container is provided to effectively separate and process the sprayed coal slag and water to prevent them from entering the working environment or the surrounding area. A cover plate 3, an air extraction port 6, and a water extraction port 7. The boxes include a first box 1 and a second box 2. The boxes are hollow shells with rectangular openings facing upward. Blowout prevention holes are opened on the corresponding surfaces of the first box 1 and the second box 2, and are connected by a flange. A sealing ring is connected to the flange. The drill rod is inserted into the first box 1 and the second box 2 The drill rod passes through the first box body 1 and the second box body 2 and contacts the coal wall. The first box body 1 is provided with a feed port at the contact end with the coal wall, and the second box body 2 is provided with a connection port 11 at the contact end with the drill rod. When in use, all the coal slag and water can enter the box body. The box body is provided with two. After entering the box body, the gas is discharged into the extraction pipeline through the air suction port 6, and the water-coal enters the water-coal separation box through the water suction port 7. A soft filter plate 5 is installed inside the anti-spray hole device for protection to prevent most of the gas and coal slag from being directly sprayed out from the gap of the drill rod. The air suction port 6 and the water suction port 7 of the two-stage device are respectively installed on the extraction pipeline and the coal-water separation box. The first box body 1 can block most of the gas and coal slag, and the second box body 2 can prevent the remaining coal slag and gas from entering the tunnel.

[0024] An air extraction port 6 is provided on the cover plate 3, and the air extraction port 6 is connected to the gas extraction pipe. A water extraction port 7 is provided at the bottom of the first box body 1 and the second box body 2, and the water extraction port 7 is connected to the water-coal separation box pipeline. The air extraction port 6 is connected to the gas extraction pipeline to extract the gas accumulated inside the box body, reduce the gas concentration, prevent accidents, and can discharge the gas in a timely and effective manner to maintain the safety of the workplace. The water extraction port 7 is connected to the water-coal separation box pipeline to separate and discharge water and coal, prevent the accumulation of water and coal slag in the box body, and avoid the interference and danger of water and coal to work.

[0025] The orifice ends of the first box body 1 and the second box body 2 are both provided with soft filter plates 5, which are made of rubber. A linkage hole is provided on the soft filter plate 5, and a drill rod is inserted into the linkage hole to reduce the gap between the drill rod and the orifice ends of the blowout prevention holes. The soft filter plate 5 is installed at the orifice ends of the blowout prevention holes and is made of rubber material to reduce the gap between the drill rod and the blowout prevention holes, thereby preventing gas and coal slag from penetrating out and improving the protection effect.

[0026] A check valve 9 is connected to the air extraction port 6 to control the flow of gas and prevent backflow.

[0027] A one-way valve 12 is connected to the water pumping port 7 to prevent the backflow of water and coal. The check valve 9 and the one-way valve 12 are respectively installed on the air pumping port 6 and the water pumping port 7 to control the one-way flow of the fluid and prevent the backflow of gas or water and coal, thereby ensuring the correct flow direction of the fluid inside the pipeline system, preventing the possibility of gas or water and coal backflow, and maintaining the stability and safety of the system.

[0028] Example 2: Please refer to Figure 1-2 , based on Example 1, it also has the following structure:

[0029] The contact end of the feed port and the coal wall is also provided with an arc plate 10 extending obliquely, and is obliquely arranged with the feed port, and the other end is in conflict with the outer circumference of the drill pipe, which is used to collect the fallen water coal and make the water coal enter the first box body 1. Through the oblique arrangement, the water coal can be effectively collected and introduced into the box body, so as to be collected, prevent the water coal from falling into the working surface, and avoid the interference of the water coal with the work.

[0030] The connection port 11 and the contact end of the drill pipe are also provided with an extension portion extending along an oblique line toward the outer circumference of the drill pipe. The extension portion is arranged in a cone shape, and the top end and the outer circumferential contact end of the drill pipe are sealed by an O-ring to prevent gas and water-coal from penetrating out, providing an effective sealing measure to prevent gas and water-coal from leaking through the outer circumference of the drill pipe, maintaining the airtightness and safety of the anti-blowout hole device, and preventing the influence of gas on the working environment.

[0031] Example 3: Please refer to Figure 3 , based on Example 1, it also has the following structure:

[0032] The tops of the first box body 1 and the second box body 2 are both pivotally connected with a cover plate 3 through a retaining spring hinge fan 4. The cover plate 3 is embedded in the first box body 1 and the second box body 2. The retaining spring hinge fan 4 provides a reliable connection and pivoting function, so that the cover plate 3 can be easily opened or closed, which is convenient for maintenance and operation inside the box. In the initial position, the cover plate 3 is tightly fitted to the top of the box through the force of the retaining spring. After opening for maintenance, the cover plate 3 falls and fits tightly to the box through the force of the retaining spring. The cover plate 3 effectively closes the top of the box, preventing water, coal and other debris from overflowing from the top of the box or external substances from entering the inside of the box, so as to keep the environment clean and safe.

[0033] A sealing strip 8 is provided on the circumference of the contact end between the cover plate 3 and the box body, which is used to make the cover plate 3 fit tightly with the first box body 1 and the second box body 2. The sealing strip 8 can effectively fill the gap between the contact end of the cover plate 3 and the box body, provide good sealing performance, prevent water, coal or other substances from leaking from the top of the box body, and keep the operating environment of the device clean and safe.

[0034] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. 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 the utility model 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 in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A double pre-extraction device for preventing blowout in drilling holes for construction in high-gas areas, installed at the contact end between the drill rod and the coal wall, characterized in that: The invention comprises two boxes, a cover plate (3), an air extraction port (6), and a water extraction port (7), wherein the boxes comprise a first box (1) and a second box (2), the boxes being hollow shells with rectangular openings facing upwards, the first box (1) and the second box (2) are provided with anti-blowout holes on corresponding surfaces and are connected via a flange plate, a sealing ring is connected to the flange plate, a drill rod is inserted into the first box (1) and the second box (2), the drill rod passes through the first box (1) and the second box (2) and contacts with a coal wall, a feed port is provided at the end of the first box (1) contacting with the coal wall, and a connection port (11) is provided at the end of the second box (2) contacting with the drill rod, The top ends of the first box body (1) and the second box body (2) are both pivotally connected to a cover plate (3) via a spring hinge fan (4); the cover plate (3) is embedded in the first box body (1) and the second box body (2); an air extraction port (6) is provided on the cover plate (3); the air extraction port (6) is connected to a gas extraction pipe; the bottom ends of the first box body (1) and the second box body (2) are provided with a water extraction port (7); the water extraction port (7) is connected to a water-coal separation box pipeline.

2. The double pre-extraction device for preventing blowout in drilling holes for extraction in high-gas area construction according to claim 1 is characterized by: The contact end of the feed port with the coal wall is also provided with an obliquely extending arc plate (10), which is arranged obliquely with the feed port and has the other end in contact with the outer circumference of the drill rod, and is used to collect the fallen water coal and allow the water coal to enter the first box (1).

3. The double pre-extraction device for preventing blowout in drilling holes for extraction in high-gas area construction according to claim 1 is characterized in that: The connection port (11) and the contact end of the drill pipe are also provided with an extension portion extending along an oblique line toward the outer circumference of the drill pipe. The extension portion is arranged in a conical shape, and the top end and the outer circumferential contact end of the drill pipe are sealed by an O-ring to prevent gas and water coal from penetrating out.

4. The double pre-extraction device for preventing blowout during drilling in high-gas area construction according to claim 1 is characterized by: A soft filter plate (5) is provided at the mouth of the anti-blowout hole in the first box body (1) and the second box body (2). The soft filter plate (5) is made of rubber. A linkage hole is provided on the soft filter plate (5). A drill rod is inserted into the linkage hole to reduce the gap between the drill rod and the anti-blowout hole.

5. The double pre-extraction device for preventing blowout during construction of gas-rich areas according to claim 1 is characterized by: The gas extraction port (6) is connected to a check valve (9) for controlling gas flow and preventing backflow.

6. The double pre-extraction device for preventing blowout during drilling in gas-rich areas according to claim 1 is characterized by: The water pumping port (7) is connected to a one-way valve (12) for preventing the backflow of water and coal.

7. The double pre-extraction device for preventing blowout during drilling in gas-rich areas according to claim 1 is characterized by: A sealing strip (8) is provided on the circumference of the contact end between the cover plate (3) and the box body, for making the cover plate (3) fit tightly with the first box body (1) and the second box body (2).

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