Blowout preventer for coal mine drilling

Abstract

The utility model relates to the technical field of coal mining, and discloses a coal mine drilling blowout preventer which comprises a cleaning impeller arranged in a sealing pipe, a protection plate arranged on one side of the cleaning impeller, a limiting block arranged on one side of the protection plate, a tensioning rod in threaded connection with the limiting block, a plurality of fixing supports in sliding connection with the middle of the tensioning rod, and a plurality of barb blocks arranged at one end of the tensioning rod. The sealing pipe is fixedly connected with the limiting block, the limiting block is tightly connected with the tensioning rod in a threaded mode, the middle of the tensioning rod is connected with the multiple fixing supports in a sliding mode, one end of the tensioning rod is provided with the multiple barb blocks, and the barb blocks are connected with the sealing pipe in a rotating mode. Therefore, when the tensioning rod can be adjusted to a proper position as needed, the barb blocks can be embedded into the coal wall, the friction force between the blowout prevention device and the coal wall is increased, slippage or separation under high pressure is prevented, the problem that the blowout prevention device is prone to being separated from the coal wall when the tensioning force is insufficient is effectively solved, and the working labor intensity is reduced.

Description

Technical Field

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

[0002] In the drilling operation of coal mine, due to the rich water resources and gas in the underground rock formation, it is easy to encounter the sudden release of high-pressure water or gas during the drilling process. The publication number is CN220522532U, which is a new type of coal mine drilling hole blowout preventer. The outer end of the sealing tube and the drill rod are sealed. The bottom of the box body is connected with a drainage channel, and a push-pull valve is arranged at the bottom of the drainage channel. The top of the box body is connected with a three-way pipe, one end of the three-way pipe is connected with a vacuum pump as a suction and discharge pipeline, and the other end of the three-way pipe is provided with an electric valve as a drainage pipeline. A pressure sensor connected to the electric valve control is arranged at the inlet of the three-way pipe; the beneficial effect is obvious, but in the process of use, it is directly inserted into the coal wall through the sleeve, lacks a certain tightening force, and it is easy to make the blowout preventer as a whole detach from the coal wall when the pressure is too high, thereby interrupting the operation, and the blowout preventer needs to be reinstalled and adjusted, which increases the labor intensity of the work.

[0003] For this reason, we propose a coal mine drilling blowout prevention device. Utility Model Content

[0004] The utility model aims to provide a coal mine drilling blowout preventer to solve the problem proposed in the above-mentioned background technology that the blowout preventer is directly inserted into the coal wall through a sleeve during use, lacks a certain tightening force, and is easy to cause the blowout preventer to be separated from the coal wall as a whole when the pressure is too high, thereby interrupting the operation, requiring the blowout preventer to be reinstalled and adjusted, and increasing the labor intensity of the work.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal mine drilling blowout prevention device, comprising a sealing tube, a cleaning impeller is arranged inside the sealing tube, a protective plate is arranged on one side of the cleaning impeller, a limit block is arranged on one side of the protective plate, the limit block is threadedly connected to a tensioning rod, a plurality of fixed brackets are slidably connected to the middle part of the tensioning rod, a plurality of barbed blocks are arranged at one end of the tensioning rod, and the barbed blocks are rotatably connected to the sealing tube.

[0006] Preferably, an air outlet pipe is provided on one side of the sealing tube, a filter plate is provided inside the air outlet pipe, and an impurity removal pipe is provided on the other side of the sealing tube.

[0007] Preferably, a plurality of fixing brackets are fixedly connected inside the sealing tube, and the plurality of fixing brackets are linearly distributed with the limiting blocks.

[0008] Preferably, a hexagonal block for rotating the hexagonal sleeve is provided at one end of the tensioning rod, and a spiral rod is provided at one side of the hexagonal block.

[0009] Preferably, the spiral rod is threadedly connected to the inside of the limiting block, and the limiting block is fixedly connected to the sealing tube.

[0010] Preferably, a group of concave magnets are provided inside the cleaning impeller, one side of the concave magnets is fixedly connected to one end of a telescopic rod, and the other end of the telescopic rod is fixedly connected to the inside of the cleaning impeller.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model fixes and connects the limit block through the sealing tube, the limit block thread is tightly connected with the tension rod, the middle part of the tension rod is slidably connected with multiple fixed brackets, one end of the tension rod is equipped with multiple barb blocks, the barb block is rotatably connected to the sealing tube, so that when the tension rod is adjusted to the appropriate position when needed, the barb block will be embedded in the coal wall, increasing the friction between the blowout prevention device and the coal wall, preventing slippage or separation under high pressure, effectively solving the problem that the blowout prevention device is easy to separate from the coal wall when the tensioning force is insufficient, and reducing the labor intensity of work.

[0013] 2. The utility model combines the concave magnet inside the cleaning impeller with the telescopic rod. The concave magnet cooperates with the telescopic rod, so that the cleaning impeller can more effectively remove impurities during rotation. The concave magnet is adsorbed on the extension rod of the rotating drill bit through the telescopic rod, so that the cleaning impeller rotates with the drill bit, thereby achieving a cleaning effect and preventing the problem of clogging of the impurity removal pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the sealing tube of the utility model when viewed from above;

[0015] Figure 2 This is a schematic diagram of the structure of the side section of the sealing tube of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the overall split of the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the sealing tube of the utility model;

[0018] In the figure: 1. sealing tube; 2. cleaning impeller; 3. protective plate; 4. limit block; 5. tension rod; 6. fixing bracket; 7. barb block; 8. filter plate; 101. air outlet pipe; 102. debris removal pipe; 201. concave magnet; 202. telescopic rod; 501. hexagonal block; 502. spiral rod. DETAILED DESCRIPTION

[0019] 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.

[0020] Example

[0021] See also Figure 1-Figure 4 The utility model is a coal mine drilling blowout prevention device shown in the figure, comprising a sealing tube 1, a cleaning impeller 2 is arranged inside the sealing tube 1, a protective plate 3 is arranged on one side of the cleaning impeller 2, a limiting block 4 is arranged on one side of the protective plate 3, the limiting block 4 is threadedly connected to the tension rod 5, the middle part of the tension rod 5 is slidably connected to multiple fixed brackets 6, and one end of the tension rod 5 is provided with multiple barb blocks 7, and the barb block 7 is rotatably connected to the sealing tube 1. The utility model fixes the limiting block 4 through the sealing tube 1, the limiting block 4 is threadedly connected to the tension rod 5, the middle part of the tension rod 5 is slidably connected to multiple fixed brackets 6, and one end of the tension rod 5 is equipped with multiple barb blocks 7, and the barb block 7 is rotatably connected to the sealing tube 1, so that the tension rod 5 can be adjusted to an appropriate position when needed, and the barb block 7 will be embedded in the coal wall, thereby increasing the friction between the blowout prevention device and the coal wall, preventing slippage or separation under high pressure, and effectively solving the problem that the blowout prevention device is easy to separate from the coal wall when the tightening force is insufficient, thereby reducing the labor intensity of work.

[0022] Furthermore, an air outlet pipe 101 is opened on one side of the sealing tube 1, a filter plate 8 is arranged inside the air outlet pipe 101, and an impurity removal pipe 102 is opened on the other side of the sealing tube 1. The air outlet pipe 101 provided on one side of the sealing tube 1 and the impurity removal pipe 102 provided on the other side provide an effective gas discharge channel. The filter plate 8 arranged inside the air outlet pipe 101 can effectively intercept and adsorb impurities such as dust and particulate matter mixed in the gas during the gas discharge process, thereby ensuring that the discharged gas is relatively pure, and then the impurities can be easily discharged through the impurity removal pipe 102, thereby keeping the interior of the device clean, thereby extending the service life of the device.

[0023] Furthermore, multiple fixed brackets 6 are fixedly connected inside the sealing tube 1, and the multiple fixed brackets 6 are linearly distributed with the limit block 4. The multiple fixed brackets 6 are fixedly connected inside the sealing tube 1, and the linear distribution of the multiple fixed brackets 6 between the sealing tube 1 and the limit block 4 helps to quickly install the tensioning rod 5. At the same time, the limit block 4 is connected to the tensioning rod 5 through threads and works with the fixed brackets 6, so that the tensioning rod 5 can be accurately telescopically adjusted in the sealing tube 1, ensuring that the blowout preventer can fit tightly against the coal wall and provide sufficient friction to prevent slippage or detachment under high pressure.

[0024] Furthermore, a hexagonal block 501 for rotating the hexagonal sleeve is provided at one end of the tensioning rod 5, and a spiral rod 502 is provided on one side of the hexagonal block 501. Through the hexagonal block 501 at one end of the tensioning rod 5 and the adjacent spiral rod 502, the hexagonal block 501 enables the tensioning rod 5 to be rotated through the hexagonal sleeve, providing a convenient operating interface, allowing the staff to easily adjust the position and tightness of the tensioning rod 5, ensuring a close fit between the blowout prevention device and the coal wall, providing sufficient tensioning force, and preventing separation under high pressure.

[0025] Furthermore, the spiral rod 502 is threadedly connected to the inside of the limit block 4, and the limit block 4 is fixedly connected to the sealing tube 1. The threaded connection between the spiral rod 502 and the limit block 4, and the fixed connection between the limit block 4 and the sealing tube 1, ensure the stability between the two. The threaded connection has good self-locking properties and can effectively prevent loosening and falling off, thereby ensuring the stability and safety of the blowout preventer under high-pressure environments. At the same time, when it is necessary to adjust the tightening force or replace parts, the connection or disassembly can be easily achieved by rotating the spiral rod 502, which greatly improves the maintenance convenience and work efficiency of the device.

[0026] Furthermore, a group of concave magnets 201 are provided inside the cleaning impeller 2, one side of the concave magnet 201 is fixedly connected to one end of the telescopic rod 202, and the other end of the telescopic rod 202 is fixedly connected to the inside of the cleaning impeller 2. By combining the concave magnet 201 inside the cleaning impeller 2 with the telescopic rod 202 and the design of the concave magnet 201 and the telescopic rod 202, the cleaning impeller 2 can more effectively remove impurities during rotation. The concave magnet 201 is adsorbed on the rotating drill bit extension rod through the telescopic rod 202, so that the cleaning impeller 2 rotates with the drill bit, thereby achieving a cleaning effect and preventing the problem of clogging of the impurity removal pipe 102.

[0027] In this scheme, the working process is as follows: when the drilling operation is in progress, the hexagonal block 501 and the spiral rod 502 at one end of the tensioning rod 5 cooperate with the limit block 4 to adjust the tensioning force of the barb block 7, so that the barb block 7 will fit closely to the coal wall, providing sufficient friction to prevent the device from being separated from the coal wall under high pressure; then the drill cleaning impeller 2 is cooperated, and the cleaning impeller 2 rotates in the sealing tube 1, and the concave magnet 201 on one side and the telescopic rod 202 are used to make the concave magnet 201 adsorbed on the rotating shaft of the drill bit, so that the cleaning impeller 2 rotates to produce a cleaning effect;

[0028] The cleaned gas is discharged through the outlet pipe 101, and the filter plate 8 inside the outlet pipe 101 will further intercept and filter the tiny particles in the gas to ensure that the discharged gas is relatively pure. At the same time, the impurity removal pipe 102 is responsible for discharging impurities intercepted by the cleaning impeller 2 and the filter plate 8 to keep the inside of the device clean.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mine drilling blowout prevention device, characterized in that: The invention comprises a sealing tube (1), wherein a cleaning impeller (2) is arranged inside the sealing tube (1), a protective plate (3) is arranged on one side of the cleaning impeller (2), a limiting block (4) is arranged on one side of the protective plate (3), the limiting block (4) is threadedly connected to a tension rod (5), a plurality of fixed brackets (6) are slidably connected to the middle of the tension rod (5), a plurality of barbed blocks (7) are arranged at one end of the tension rod (5), and the barbed blocks (7) are rotatably connected to the sealing tube (1).

2. A coal mine drilling blowout prevention device according to claim 1, characterized in that: An air outlet pipe (101) is provided on one side of the sealed tube (1), a filter plate (8) is provided inside the air outlet pipe (101), and an impurity removal pipe (102) is provided on the other side of the sealed tube (1).

3. A coal mine drilling blowout prevention device according to claim 2, characterized in that: A plurality of fixed brackets (6) are fixedly connected inside the sealing tube (1), and the plurality of fixed brackets (6) and the limit blocks (4) are linearly distributed.

4. A coal mine drilling blowout prevention device according to claim 3, characterized in that: A hexagonal block (501) for rotating the inner hexagonal sleeve is provided at one end of the tensioning rod (5), and a spiral rod (502) is provided at one side of the hexagonal block (501).

5. A coal mine drilling blowout prevention device according to claim 4, characterized in that: The spiral rod (502) is threadedly connected to the interior of the limiting block (4), and the limiting block (4) is fixedly connected to the sealing tube (1).

6. A coal mine drilling blowout prevention device according to claim 1, characterized in that: A group of concave magnets (201) are provided inside the cleaning impeller (2); one side of the concave magnets (201) is fixedly connected to one end of a telescopic rod (202); and the other end of the telescopic rod (202) is fixedly connected to the inside of the cleaning impeller (2).

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