Hole spraying prevention device for drilling hole orifice in underground coal mine drilling

Abstract

The utility model discloses a hole spraying prevention device for a drilling hole opening in underground coal mine drilling, and belongs to the technical field of coal mine drilling safety. Comprising a connecting flange, a first connecting pipe and a blowout prevention chamber, the blowout prevention chamber comprises a blowout prevention cavity and two branch pipes, and the two branch pipes symmetrically and obliquely communicate with the two sides of the blowout prevention cavity; sealing pieces are arranged in the two branch pipes, each sealing piece is formed by connecting a guide rod with a sealing rod in an inclined mode, the guide rods slide in the branch pipes in parallel, the sealing rods are fixedly connected to the guide rods in an inclined upward mode, the contact end face between the two sealing rods is a vertical plane, and suction pieces are arranged on the two end faces; the two sealing pieces are tightly connected together through mutual suction force between the two suction pieces. According to the device, the sealing piece is driven by the driving device to slide, so that the two suction pieces are sucked to seal the blowout prevention chamber and the first connecting pipe, the phenomenon that a large amount of gas or water is sprayed out in a short time is prevented, the safety of drilling operation is improved, and the blowout prevention effect is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine drilling safety, and in particular relates to a blowout prevention device for a borehole opening used in underground coal mine drilling. Background Art

[0002] In the process of coal mining, underground drilling is often required to obtain detailed geological information of coal seams. However, during the drilling process, due to the high gas content and fast gas desorption of coal seams, drilling hole spraying often occurs. The sprayed gas and coal powder not only endanger the safety of personnel, but also may cause gas accidents. Therefore, how to effectively control the drilling hole spraying phenomenon and ensure the safety of drilling operations has become an urgent problem to be solved in coal mining production.

[0003] However, the blowout prevention effect of the existing drilling blowout prevention device is not ideal, and it is urgently needed to provide a coal mine underground drilling blowout prevention device with good blowout prevention effect. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a blowout prevention hole device for underground coal mine drilling. By arranging a blowout prevention chamber, a sealing member, a suction member and a driving device, when a situation requiring blowout prevention is encountered during use, the sealing member is driven to slide by the driving device, and then the two suction members are attracted to seal the blowout prevention chamber and the first connecting pipe, thereby preventing the occurrence of a large amount of gas or water spraying out in a short period of time, improving the safety of drilling operations, and enhancing the blowout prevention effect.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a blowout prevention hole device for drilling holes in coal mines, comprising a connecting flange, a first connecting pipe and a blowout prevention chamber, the blowout prevention chamber comprising a blowout prevention cavity and a branch pipe, two branch pipes are provided and are symmetrically inclined and connected on both sides of the blowout prevention cavity, the bottom of the blowout prevention cavity is connected to the first connecting pipe, and the lower end of the first connecting pipe is connected to the connecting flange; sealing members are provided inside the two branch pipes, the sealing members are composed of a guide rod obliquely connected to a sealing rod, the guide rod slides parallel to the inside of the branch pipe, the sealing rod is obliquely fixedly connected to the guide rod upward, and the contact end surface between the two sealing rods on the two seals is a vertical plane, and suction members are provided on the contact end surface between the two sealing rods, and the two seals are tightly connected together by the mutual suction between the two suction members.

[0006] Furthermore, the two sealing rods are symmetrically arranged, and the sealing rods are arranged in parallel with the guide rods on the opposite sides thereof.

[0007] Furthermore, the inclined angle between the branch pipe and the upper end side wall of the blowout prevention cavity is set to an acute angle.

[0008] Furthermore, a driving device for driving the two sealing members to slide in the branch pipe is also provided on the outside of the branch pipe.

[0009] Furthermore, the suction member is a vacuum suction disk or a magnetic disk.

[0010] Furthermore, an air leakage pipe for discharging a small amount of leaked gas or water is fixedly connected to the outside of the blowout prevention chamber, and the air leakage pipe is arranged on the blowout prevention chamber between the two branch pipes.

[0011] Furthermore, a valve is provided on the air release pipe.

[0012] Furthermore, the top of the blowout prevention chamber is also connected to a second connecting pipe for inserting a drill bit, and the symmetry centers of the second connecting pipe, the blowout prevention chamber, the first connecting pipe and the connecting flange are all located on the same axis.

[0013] The beneficial effects of the utility model are:

[0014] 1) The utility model device is provided with a blowout prevention chamber, a sealing member, a suction member and a driving device. When a blowout prevention situation is encountered during use, the driving device drives the sealing member to slide, and then the two suction members are attracted to seal the blowout prevention chamber and the first connecting pipe, thereby preventing the occurrence of a large amount of gas or water spraying out in a short period of time, improving the safety of drilling operations, and enhancing the blowout prevention effect.

[0015] 2) In the device of the utility model, two sealing rods are symmetrically arranged, and the sealing rods are arranged parallel to the guide rods on the opposite sides thereof. A suction piece is arranged on the sealing rod, and the suction piece adopts a vacuum suction disk or a magnetic disk. When the two sealing pieces are approaching each other, the two suction pieces are sucked together to form a better sealing effect, thereby further improving the structural stability and airtightness of the device and enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0018] In the figure, 1-connecting flange, 2-first connecting pipe, 3-blowout prevention chamber, 301-blowout prevention cavity, 302-branch pipe, 4-sealing member, 401-guide rod, 402-sealing rod, 5-suction member, 6-driving device, 7-vent pipe, 8-second connecting pipe. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0020] Example: Figure 1~2As shown, the utility model provides a blowout prevention hole device for drilling holes in coal mines, comprising a connecting flange 1, a first connecting pipe 2 and a blowout prevention chamber 3, the blowout prevention chamber 3 comprising a blowout prevention cavity 301 and a branch pipe 302, the branch pipe 302 is provided with two and symmetrically inclined and connected on both sides of the blowout prevention cavity 301, the inclination angle between the branch pipe 302 and the upper end side wall of the blowout prevention cavity 301 is an acute angle, the bottom of the blowout prevention cavity 301 is connected to the first connecting pipe 2, and the lower end of the first connecting pipe 2 is connected to the connecting flange 1.

[0021] The insides of the two branch pipes 302 are both slidably connected to the sealing member 4, and the sealing member 4 is composed of a guide rod 401 obliquely connected to a sealing rod 402, the guide rod 401 slides parallel inside the branch pipe 302, and the sealing rod 402 is obliquely upward and fixedly connected to the guide rod 401; the contact end surface between the two sealing rods 402 on the two sealing members 4 is a vertical plane, and suction members 5 are pasted on the contact end surfaces between the two sealing rods 402, and the two sealing members 4 are tightly connected together through the mutual suction between the two suction members 5.

[0022] The two sealing rods 402 are symmetrically arranged, and the sealing rods 402 are arranged in parallel with the guide rods 401 on the opposite sides thereof, so that the suction force between the contact surfaces of the two sealing rods 402 can be increased in the space, thereby achieving a good sealing effect.

[0023] The suction member 5 adopts a vacuum suction disk or a magnetic disk. The vacuum suction disk realizes a tight connection between the two through atmospheric pressure, and the magnetic disk realizes a tight connection through the magnetic force between the two, both of which can achieve a good sealing effect.

[0024] A driving device 6 for driving the two sealing members 4 to slide in the branch pipe 302 is also installed outside the branch pipe 302. The driving device 6 can use a driving motor to drive the threaded rod for transmission.

[0025] The outside of the blowout prevention chamber 3 is also fixedly connected with a vent pipe 7, which is connected to the blowout prevention chamber 3 between the two branch pipes 302. A valve is installed on the vent pipe 7, which enables the device to discharge a small amount of leaked gas or water that is not completely sealed by the seal 4.

[0026] The top of the blowout prevention chamber 3 is also connected to a second connecting pipe 8 for inserting a drill bit. The symmetry centers of the second connecting pipe 8, the blowout prevention chamber 3, the first connecting pipe 2 and the connecting flange 1 are all located on the same axis. The drill bit passes through the second connecting pipe 8, the blowout prevention chamber 3, the connecting pipe 2 and the connecting flange 1 in sequence until it is inserted into the ground for drilling.

[0027] Working process:

[0028] When a situation requiring blowout prevention is encountered, the threaded rod is driven to rotate by the driving device 6, so that the threaded rod drives the two sealing members 4 to move toward each other. During the movement, the sealing member 4 drives the guide rod 401 to slide toward the blowout prevention cavity 301 in the branch pipe 302. When the two sealing rods 402 on the sealing member 4 contact, the movement is completed, and the two sealing members 4 are sucked together by the suction member 5, so as to seal the blowout prevention chamber 3 and the connecting pipe 2.

[0029] The utility model provides a blowout prevention chamber, a sealing member, a suction member and a driving device. When a blowout prevention situation is encountered during use, the sealing member is driven to slide by the driving device, so that the two suction members are attracted to seal the blowout prevention chamber and the first connecting pipe, thereby preventing the occurrence of a large amount of gas or water spraying out in a short period of time, thereby improving the safety of drilling operations and enhancing the blowout prevention effect.

[0030] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A blowout prevention device for drilling holes in underground coal mines, characterized in that: The invention comprises a connecting flange (1), a first connecting pipe (2) and a blowout prevention chamber (3), wherein the blowout prevention chamber (3) comprises a blowout prevention cavity (301) and a branch pipe (302), wherein two branch pipes (302) are provided and are symmetrically inclined and connected on both sides of the blowout prevention cavity (301), wherein the bottom of the blowout prevention cavity (301) is connected to the first connecting pipe (2), and the lower end of the first connecting pipe (2) is connected to the connecting flange (1); the inside of the two branch pipes (302) are both provided with sealing members (4), and the sealing members (4) are guided by the guide members. The rod (401) is obliquely connected to the sealing rod (402), the guide rod (401) slides parallel to the inside of the branch pipe (302), the sealing rod (402) is obliquely upwardly fixedly connected to the guide rod (401), and the contact end surface between the two sealing rods (402) on the two sealing members (4) is a vertical plane, and suction members (5) are provided on the contact end surfaces between the two sealing rods (402), and the two sealing members (4) are tightly connected together through the mutual suction between the two suction members (5).

2. The anti-blowout hole device for underground coal mine drilling according to claim 1 is characterized in that: The two sealing rods (402) are symmetrically arranged, and the sealing rod (402) is arranged in parallel with the guide rod (401) on the opposite side thereof.

3. The anti-blowout hole device for underground coal mine drilling according to claim 1, characterized in that: The inclined angle between the branch pipe (302) and the upper end side wall of the blowout prevention cavity (301) is set to be an acute angle.

4. A blowout prevention device for drilling holes in underground coal mines according to claim 1 or 3, characterized in that: A driving device (6) for driving the two sealing members (4) to slide inside the branch pipe (302) is also provided outside the branch pipe (302).

5. The anti-blowout hole device for underground coal mine drilling according to claim 1, characterized in that: The suction member (5) is a vacuum suction disk or a magnetic disk.

6. The anti-blowout hole device for underground coal mine drilling according to claim 1, characterized in that: The outside of the blowout prevention chamber (3) is also fixedly connected to a gas discharge pipe (7) for discharging a small amount of leaked gas or water. The gas discharge pipe (7) is arranged on the blowout prevention chamber (3) between the two branch pipes (302).

7. The anti-blowout hole device for underground coal mine drilling according to claim 6, characterized in that: The air release pipe (7) is provided with a valve.

8. The anti-blowout hole device for underground coal mine drilling according to claim 1, characterized in that: The top of the blowout prevention chamber (3) is also connected to a second connecting pipe (8) for inserting a drill bit, and the symmetry centers of the second connecting pipe (8), the blowout prevention chamber (3), the first connecting pipe (2) and the connecting flange (1) are all located on the same axis.

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