Blowout preventer for drilling

Abstract

According to the drilling blowout preventer, a buffer plate is arranged in a shell, when coal water and gas enter the shell, the buffer plate can be impacted and is tightly attached to the inner wall of the shell to move, meanwhile, a sliding rod slides in a through hole in a guide block and extrudes a buffer spring, and the buffer spring is driven by the sliding rod to rotate; the surface of one end of the buffer plate is made of rubber, impact is further relieved, when the buffer spring is compressed, the buffer plate can be pushed to reset, in the resetting process, the buffer plate can scrape off attachments on the inner wall of the shell and push the attachments to the coal discharging opening, coal slides off through the conical discharging opening, and the coal discharging opening is prevented from falling off. And in the falling process, the round turning cover located at the outlet position is impacted, the round turning cover is promoted to turn over, and therefore discharging of gas above the round turning cover is accelerated, the adjustable lifting rod is arranged on the shell, the height of the lifting rod can be adjusted according to the drilling requirements of different heights, the double-thread screw is used for limiting, and the operation requirement of manual lifting is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a drilling blowout prevention device. Background Art

[0002] During underground mining, blowouts often occur, especially in high-gas working areas. The gas in the coal seam, together with coal slag and water, will quickly rush out of the borehole, causing gas to exceed the standard, seriously affecting personnel safety. At the same time, the gushing water and coal will also affect the working face, bringing great safety hazards. Therefore, an effective blowout prevention device must be equipped. However, the existing blowout prevention device is usually mounted on the drill pipe. Workers need to perform frequent lifting operations during the mining process, which increases physical exertion, not only reduces work efficiency, but also leads to accumulated fatigue of workers, thereby affecting work safety and is not conducive to long-term continuous work. At the same time, after long-term use, coal slime is easily accumulated on the inner wall of the blowout prevention device, causing blockage, affecting the normal use and protection effect of the device. Utility Model Content

[0003] The purpose of the utility model is to provide a drilling blowout prevention device to solve the problem that the existing blowout prevention hole device is usually mounted on the drill rod, and the workers need to perform frequent lifting operations during the mining process, which increases physical exertion, not only reduces work efficiency, but also leads to the accumulation of fatigue of the workers, thereby affecting the safety of the operation and being unfavorable for long-term continuous work. At the same time, after long-term use, the inner wall of the blowout prevention hole device is prone to accumulation of coal slime, causing blockage, affecting the normal use and protection effect of the device.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drilling blowout prevention device, comprising a shell, a gas discharge port, a coal discharge port, a lifting device, and a buffer device. Positioning holes for the drill rod to pass through are symmetrically opened on the front and rear ends of the shell, and the positioning holes are connected to guide sleeves. A gas discharge port is opened on the top of one end of the shell corresponding to the drill hole, and a coal discharge port is opened on the bottom end. A circular flip cover is hinged to the bottom end of the coal discharge port. The buffer device is provided in the shell, and the lifting device is connected to the middle part of the outer side of the shell.

[0005] The buffer device includes a buffer plate, a fixed block, a sliding rod, a guide block, and a buffer spring. The buffer plate is arranged inside the shell and slidably fits the shell. A connecting hole is opened in the middle corresponding to the positioning hole, and its circumference conflicts with the inner wall of the shell. Four fixing blocks are evenly arranged on the side of the buffer plate away from the drilled hole. The rear end of the fixed block is correspondingly provided with a guide block and is connected to the inner wall of the shell. A through hole is opened in the middle of the guide block, and a sliding rod is connected to the fixed block. The other end of the sliding rod passes through the guide block, and the top end is connected to a limiting ring. A buffer spring is provided between the buffer plate and the guide block and is sleeved on the sliding rod. One end of the buffer spring conflicts with the fixed block, and the other end conflicts with the guide block.

[0006] The lifting device includes a lifting rod, a support rod, a base, and a double-headed screw. The left and right sides of the top of the base are symmetrical and respectively connected to the support rods. The support rod is a hollow shell with an opening upward. The lifting rod is connected to the inside of the support rod. The lifting rod is slidably fitted with the support rod. A number of limiting holes are evenly opened on the support rod, and linkage holes are opened on the lifting rod corresponding to the limiting holes. The double-headed screws are inserted in the limiting holes. The double-headed screws pass through the support rod and the lifting rod, and nuts are screwed on both ends.

[0007] Preferably, the gas discharge port and the coal discharge port are both conical in shape.

[0008] Preferably, the gas discharge port is connected to a gas extraction pipeline, and a one-way valve is provided on the pipeline.

[0009] Preferably, the left and right sides of the circular flip cover are symmetrical and are respectively connected to a counterweight.

[0010] Preferably, the fixing block is provided with an internal thread, the sliding rod is correspondingly provided with an external thread, and the sliding rod is screwed onto the fixing block.

[0011] Preferably, a groove is provided on the connection hole of the buffer plate, an O-ring is connected in the groove, and the O-ring fits tightly with the outer circumference of the drill rod.

[0012] Preferably, a rubber plate is connected to the surface of one end of the buffer plate corresponding to the drill hole to mitigate impact.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By arranging a buffer plate inside the shell, it can effectively cope with the impact force generated when a large amount of water, coal and gas enter the shell. When water, coal and gas enter the shell, the buffer plate will be impacted and fit tightly with the inner wall of the shell to move. At the same time, the slide rod slides in the through hole on the guide block and squeezes the buffer spring, which plays a role in buffering and reducing the impact. One end surface of the buffer plate is made of rubber material to further reduce the impact. When the buffer spring is compressed, it pushes the buffer plate to reset. During the reset process, the buffer plate will scrape off the attachments on the inner wall of the shell and push it to the coal discharge outlet. The coal slides through the conical discharge outlet and impacts the circular flap at the outlet position during the falling process, causing the circular flap to flip over, thereby accelerating the discharge of gas above. This design not only improves the exhaust efficiency, but also effectively avoids gas accumulation when the coal falls. At the same time, an adjustable lifting rod is provided on the shell. The height of the lifting rod can be adjusted according to the drilling requirements of different heights. The double-headed screw is used for limiting, avoiding the need for manual lifting operations, further improving the system's degree of automation and ease of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall front structure of the utility model.

[0016] Figure 2 This is a schematic structural diagram of the buffer device of the present utility model.

[0017] Figure 3 This is a schematic diagram of the disassembled structure of the fixed block and the sliding rod of the utility model.

[0018] Figure 4 This is a schematic diagram of the structure in which the circular flip cover, counterweight block and coal discharge port cooperate with each other in the utility model.

[0019] In the figure: 1. Shell; 2. Gas discharge port; 3. Coal discharge port; 4. Lifting rod; 5. Support rod; 6. Base; 7. Double-headed screw; 8. Buffer device; 801. Buffer plate; 802. Fixed block; 803. Sliding rod; 804. Guide block; 805. Buffer spring; 9. Round flip cover; 10. Counterweight block; 11. O-ring; 12. Rubber sheet. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1-4 The utility model provides an embodiment of a drilling blowout prevention device, comprising a shell 1, a gas discharge port 2, a coal discharge port 3, a lifting device, and a buffer device 8. Positioning holes for the drill rod to pass through are symmetrically opened on the front and rear ends of the shell 1. The positioning holes opened at the front and rear ends of the shell 1 can allow the drill rod to pass through, ensuring that the equipment can perform drilling operations. By designing the positioning holes, the stability of the drill rod can be ensured, deviation and error can be reduced, and good positioning and support can be provided. A guide sleeve is connected to the positioning holes. A gas discharge port 2 is opened on the top of one end of the shell 1 corresponding to the drill hole. The gas discharge port 2 is used to discharge the gas generated during the drilling process to ensure the safety of the working environment. The conical design helps to enable the gas to be discharged quickly and effectively. A coal discharge port 3 is opened at the bottom end. The coal discharge port 3 is used to discharge coal or debris and water-coal mixture generated in the drill hole to prevent their accumulation from affecting the operation. A circular flip cover 9 is hinged on the bottom end of the coal discharge port 3. A buffer device 8 is provided in the shell 1, and a lifting device is connected to the middle part of the outer side of the shell 1.

[0025] The buffer device 8 includes a buffer plate 801, a fixed block 802, a slide rod 803, a guide block 804, and a buffer spring 805. The buffer plate 801 is arranged inside the shell 1 and slides in the shell 1. The buffer plate 801 is used to absorb the impact when a large amount of water and coal enters and to resist the coal inside the shell 1. A connecting hole is opened in the middle corresponding to the positioning hole. The connecting hole is used to allow the drill rod to pass through and assists in positioning the drill rod with the positioning hole. Its circumference conflicts with the inner wall of the shell 1. During the reset process of the buffer plate 801, the circumference can scrape off the attachments on the inner wall of the shell 1. Four fixed blocks 802 are evenly arranged on the side of the buffer plate 801 away from the drill hole. The rear end of the fixed block 802 is correspondingly provided with a guide block 804. The guide block 804 is used to provide the sliding position of the slide rod 803 for limitation so that the buffer plate 801 When sliding, the buffer spring 805 is compressed for buffering, and is connected to the inner wall of the shell 1. A through hole is provided in the middle of the guide block 804, and a sliding rod 803 is connected to the fixed block 802. The sliding rod 803 is connected to the fixed block 802 to provide buffering movement by sliding. The other end of the sliding rod 803 passes through the guide block 804, and the top is connected to a limit ring. A buffer spring 805 is provided between the buffer plate 801 and the guide block 804. The buffer spring 805 absorbs the impact force and provides a rebound force, so that the buffer plate 801 can automatically recover after the impact and is sleeved on the slide rod 803. One end of the buffer spring 805 contacts the fixed block 802, and the other end contacts the guide block 804. Through the cooperation of the buffer plate 801 and the buffer spring 805, the vibration and impact generated when a large amount of water and coal rushes into the shell 1 during the drilling process can be effectively reduced.

[0026] The gas discharge port 2 and the coal discharge port 3 are both conical in shape.

[0027] The gas discharge port 2 is connected to the gas extraction pipeline, and a one-way valve is installed on the pipeline to prevent gas overflow, causing the gas in the working face to exceed the standard and affect the safety of the workers.

[0028] The left and right sides of the circular flap 9 are symmetrical and are respectively connected with a counterweight 10. The circular flap 9 is used to close the coal discharge port 3 to prevent the external environment from entering and ensure the stability of the discharge port. Through the design of the flap, it can be automatically opened or closed when needed to prevent the leakage of coal debris and improve the flexibility of operation. At the same time, the circular flap 9 is turned over by its own gravity during the discharge of coal, so that the gas above is discharged faster. At the same time, the counterweight 10 keeps the circular flap 9 horizontal in the initial position, closing the coal discharge port 3.

[0029] The fixed block 802 is provided with an internal thread, and the sliding rod 803 is provided with an external thread corresponding thereto, and the sliding rod 803 is screwed to the fixed block 802. This design allows the sliding rod 803 to be disassembled and replaced, providing practicality.

[0030] During use, first insert the drill rod into the shell 1 through the guide sleeve. When drilling, fit the guide sleeve at one end of the drill hole to the coal wall. When a large amount of water, coal and gas rush into the shell 1, the buffer plate 801 is impacted. The buffer plate 801 drives the slide bar 803 to slide backward, and at the same time squeezes the buffer spring 805 to slow down the impact. Then the buffer spring 805 resets the buffer plate 801 after being squeezed. The buffer plate 801 scrapes off the attachments on the inner wall of the shell 1, and then discharges them through the coal discharge port 3. At the same time, it impacts the circular flap 9, and the circular flap 9 rotates to accelerate the discharge of gas above.

[0031] Example 2: Please refer to Figure 1 , based on Example 1, further comprising the following structure:

[0032] The lifting device includes a lifting rod 4, a support rod 5, a base 6, and a double-headed screw 7. The top and left and right sides of the base 6 are symmetrical and respectively connected with support rods 5. The base 6 serves as the base of the entire device and plays a supporting and stabilizing role. It is placed on the ground and connected through the symmetrical support rods 5 to ensure the balance of the entire structure. The support rod 5 is a hollow shell with an opening upward. The interior of the support rod 5 is connected with the lifting rod 4. The lifting rod 4 drives the movement of the device by sliding with the support rod 5, thereby realizing precise lifting operation, thereby adjusting the drilling work at different heights without the need The housing 1 is supported by a person who needs to lift it, making it easy to work for a long time. The lifting rod 4 slides in conjunction with the support rod 5. The support rod 5 serves as a supporting structure, taking on the sliding track of the lifting rod 4 and providing a fixed support point to ensure the stability of the entire device. The support rod 5 is evenly provided with a number of limit holes. The limit holes control the sliding range of the lifting rod 4, preventing excessive lifting and ensuring the safety and accuracy of the operation. The lifting rod 4 is provided with linkage holes corresponding to the limit holes. The limit holes are inserted with stud screws 7. The stud screws 7 pass through the support rod 5 and the lifting rod 4, and are screwed with nuts at both ends. During use, the height of the lifting rod 4 is adjusted according to the different drilling heights. After adjustment, the stud screws 7 are inserted and tightened with nuts at both ends to limit the position of the lifting rod 4, thereby completing the adjustment. At the same time, the housing 1 can be rotated, facilitating operation and adjustment during work.

[0033] Example 3: Please refer to Figure 2 , based on Example 1, further comprising the following structure:

[0034] A groove is provided on the connecting hole of the buffer plate 801, and an O-ring 11 is connected in the groove. The O-ring 11 fits tightly with the outer circumference of the drill rod to increase the sealing performance. At the same time, the flexibility and sealing of the O-ring 11 can reduce the vibration and friction of the drill rod and reduce wear.

[0035] Example 4: Please refer to Figure 2, based on Example 1, further comprising the following structure:

[0036] A rubber sheet 12 is attached to the surface of the end of the buffer plate 801 corresponding to the drilled hole to mitigate impact. This effectively mitigates the impact of coal or coal-water entering the device. Its flexibility and elasticity effectively absorb external shock and vibration, minimizing damage to the buffer plate 801 and protecting the equipment while extending its service life. Furthermore, the rubber sheet 12 slows the velocity of incoming material, reducing wear and tear and impact on the equipment.

[0037] The above is only an embodiment of the present invention, and common knowledge such as the specific structure and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A drilling blowout prevention device, characterized in that: The invention comprises a shell (1), a gas discharge port (2), a coal discharge port (3), a lifting device, and a buffer device (8). Positioning holes for the drill rod to pass through are symmetrically provided at the front and rear ends of the shell (1), and the positioning holes are connected to guide sleeves. A gas discharge port (2) is provided at the top of one end of the shell (1) corresponding to the drill hole, and a coal discharge port (3) is provided at the bottom. A circular flap (9) is hingedly connected to the bottom end of the coal discharge port (3). The buffer device (8) is provided in the shell (1), and the lifting device is connected to the middle of the outer side of the shell (1). The buffer device (8) includes a buffer plate (801), a fixed block (802), a slide rod (803), a guide block (804), and a buffer spring (805). The buffer plate (801) is arranged inside the shell (1) and is slidably matched with the shell (1). A connecting hole is opened in the middle corresponding to the positioning hole, and its circumference is in conflict with the inner wall of the shell (1). Four fixed blocks (802) are evenly arranged on the side of the buffer plate (801) away from the drill hole, and a guide block is correspondingly provided at the rear end of the fixed block (802). (804), and is connected to the inner wall of the shell (1), a through hole is opened in the middle of the guide block (804), a slide rod (803) is connected to the fixed block (802), the other end of the slide rod (803) passes through the guide block (804), and the top end is connected to a limit ring, a buffer spring (805) is provided between the buffer plate (801) and the guide block (804), and is sleeved on the slide rod (803), one end of the buffer spring (805) is in contact with the fixed block (802), and the other end is in contact with the guide block (804), The lifting device comprises a lifting rod (4), a support rod (5), a base (6), and a double-headed screw (7). The top left and right sides of the base (6) are symmetrical and are respectively connected to the support rod (5). The support rod (5) is a hollow shell with an opening facing upward. The interior of the support rod (5) is connected to the lifting rod (4). The lifting rod (4) is slidably matched with the support rod (5). A plurality of limiting holes are evenly opened on the support rod (5). Linkage holes are opened on the lifting rod (4) corresponding to the limiting holes. The double-headed screw (7) is inserted into the limiting hole. The double-headed screw (7) passes through the support rod (5) and the lifting rod (4) and is screwed with nuts at both ends.

2. A drilling blowout prevention device according to claim 1, characterized in that: The gas discharge port (2) and the coal discharge port (3) are both arranged in a conical shape.

3. The drilling blowout prevention device according to claim 1, characterized in that: The gas discharge port (2) is connected to a gas extraction pipeline, and a one-way valve is provided on the pipeline.

4. The drilling blowout prevention device according to claim 1, characterized in that: The left and right sides of the circular flip cover (9) are symmetrical and are respectively connected to a counterweight block (10).

5. The drilling blowout prevention device according to claim 1, characterized in that: The fixing block (802) is provided with an internal thread, the sliding rod (803) is correspondingly provided with an external thread, and the sliding rod (803) is screwed onto the fixing block (802).

6. The drilling blowout prevention device according to claim 1, characterized in that: A groove is provided on the connection hole of the buffer plate (801), an O-shaped sealing ring (11) is connected in the groove, and the O-shaped sealing ring (11) is tightly fitted to the outer circumference of the drill rod.

7. The drilling blowout prevention device according to claim 1, characterized in that: A rubber plate (12) is connected to the surface of one end of the buffer plate (801) corresponding to the drill hole, for mitigating impact.

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