Inflatable rotor drill pipe seal

Abstract

The utility model discloses a kind of inflatable rotor formula drill pipe sealing devices, the device is sleeved on drill pipe, lower end sealing connection has three-way slag discharge pipe, including the stator group of outside and the rotor group of inside, rotor group rotation is arranged in stator group, stator group is provided with inflation hole, rotor group is provided with inflatable sealing capsule, inflatable sealing capsule is wrapped drill pipe with its rotation after inflation, this inflatable rotor formula drill pipe sealing device is used in set with three-way slag discharge pipe, three-way slag discharge pipe is sealed to drill hole, the utility model is sealed to the gap of drill pipe and sleeve, in the process of drilling, effectively prevent gas from coal wall and drill pipe gap spout or overflow, suitable for three prism, grooving, spiral and various shapes of drill pipe, inflatable sealing capsule in the utility model is wrapped drill pipe after inflation, in the process of drilling, it will not contact and rub with the inner wall of drill hole, greatly improve its service life, without frequent replacement, improve drilling efficiency, reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, specifically to an air-filled rotor-type drill pipe sealing device. Background Technology

[0002] Gas leakage is a very serious accident during coal mining. Currently, the main method to remove gas is through drilling to prevent excessive gas pressure. However, during the extraction process, gas will spray out from the borehole, affecting operational safety. Existing technology usually connects a three-way slag discharge pipe to filter coal slag carried in the gas and installs a sealing capsule on the drill rod to prevent gas leakage from the gap between the borehole and the drill rod. This sealing method has a significant drawback: the sealing capsule is prone to wear due to contact and friction with the inner wall of the borehole, requiring regular replacement, which affects drilling efficiency and increases operating costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an air-filled rotor-type drill pipe sealing device, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an inflatable rotor-type drill rod sealing device, which is sleeved on the drill rod and has a three-way slag discharge pipe sealed at the lower end. The device includes an external stator assembly and an internal rotor assembly. The rotor assembly is rotatably disposed within the stator assembly. The stator assembly is provided with an air inlet, and the rotor assembly is provided with an inflatable sealing capsule. After being inflated, the inflatable sealing capsule wraps around the drill rod and rotates with it.

[0005] As a preferred embodiment of this utility model, the stator assembly includes a mounting housing, an air inflator seat on the top of the mounting housing with an air inflator hole, and a connecting seat at the bottom of the mounting housing for connecting to a three-way slag discharge pipe.

[0006] As a preferred embodiment of this utility model, a drill rod sleeve is provided inside the through hole of the air-filled seat.

[0007] As a preferred embodiment of the present invention, the rotor assembly includes a protective cylinder, the inflatable sealing capsule is disposed inside the protective cylinder, a sealing sleeve is provided at the bottom end of the protective cylinder, the sealing sleeve is pressed against the inflatable sealing capsule, the sealing sleeve is located inside the bottom connecting seat of the stator assembly, and a sealing ring is provided at the gap between the sealing sleeve and the connecting seat.

[0008] As a preferred embodiment of this utility model, a positioning wheel is provided between the stator assembly and the rotor assembly.

[0009] As a preferred embodiment of this utility model, an inflation distribution plate is provided between the inflation hole and the inflation sealing capsule. The inflation distribution plate is rotatably mounted in the stator assembly. An inflation pipe is provided on the inflation distribution plate and is inserted into the air inlet of the inflation sealing capsule.

[0010] As a preferred embodiment of this utility model, the number of air inlets in the inflation tube and the inflation sealing capsule is not less than three, and an annular diversion groove is provided on the end face of the inflation diversion plate near the inflation hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This pneumatic rotor-type drill rod sealing device is used in conjunction with a three-way slag discharge pipe. The three-way slag discharge pipe seals the drill hole, while this utility model seals the gap between the drill rod and the sleeve. During the drilling process, it effectively prevents gas from spraying out or overflowing from the gap between the coal wall and the drill rod. It is suitable for drill rods of various shapes such as triangular, grooved, and spiral. The pneumatic sealing capsule in this utility model wraps around the drill rod after inflation, and will not come into contact with or rub against the inner wall of the drill hole during the drilling process, which greatly improves its service life, eliminates the need for frequent replacement, improves drilling efficiency, and reduces operating costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the sealing sleeve structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the air-filled diverter plate of this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the inflatable sealed capsule of this utility model.

[0017] In the diagram: 1. Stator assembly, 11. Mounting housing, 12. Inflation seat, 13. Drill rod sleeve, 14. Inflation hole, 15. Connecting seat, 2. Rotor assembly, 21. Protective cylinder, 22. Inflation sealing capsule, 23. Inflation distributor plate, 24. Inflation pipe, 25. Sealing sleeve, 3. Limiting wheel. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Please see Figure 1-5 This utility model provides a technical solution: an inflatable rotor-type drill rod sealing device, which is sleeved on the drill rod and has a three-way slag discharge pipe sealed at the lower end. The device includes an external stator assembly 1 and an internal rotor assembly 2. The rotor assembly 2 is rotatably disposed inside the stator assembly 1. A positioning wheel 3 is provided between the stator assembly 1 and the rotor assembly 2. The positioning wheel 3 supports and positions the protective cylinder 21 to ensure the coaxiality of the protective cylinder 21 and the mounting housing 11 during installation and to improve the stability of the rotor assembly 2 during rotation. An air inlet 14 is provided on the stator assembly 1, and an inflatable sealing capsule 22 is provided on the rotor assembly 2. After being inflated, the inflatable sealing capsule 22 wraps around the drill rod and rotates with it.

[0020] The stator assembly 1 includes a mounting housing 11, an air inflator 12 is provided on the top of the mounting housing 11, an air inflator 14 is provided on the air inflator 12, and a drill rod sleeve 13 is provided in the through hole of the air inflator 12. The drill rod sleeve 13 has a simple structure and low manufacturing cost, and can be used to protect the air inflator 12 and prevent the drill rod from scratching the air inflator 12 during installation. A connecting seat 15 is provided at the bottom of the mounting housing 11 for connecting to a three-way slag discharge pipe.

[0021] The rotor assembly 2 includes a protective cylinder 21, an inflatable sealing capsule 22 is disposed inside the protective cylinder 21, a sealing sleeve 25 is provided at the bottom end of the protective cylinder 21, the sealing sleeve 25 presses against the inflatable sealing capsule 22, the sealing sleeve 25 is located inside the bottom connecting seat 15 of the stator assembly 1, and a sealing ring is provided at the gap between the sealing sleeve 25 and the connecting seat 15.

[0022] An inflation distribution plate 23 is provided between the inflation port 14 and the inflation sealing capsule 22. The inflation distribution plate 23 is rotatably mounted in the stator assembly 1. An inflation pipe 24 is provided on the inflation distribution plate 23. The inflation pipe 24 is inserted into the air inlet of the inflation sealing capsule 22. The number of air inlets of the inflation pipe 24 and the inflation sealing capsule 22 is not less than three. An annular distribution groove is provided on the end face of the inflation distribution plate 23 near the inflation port 14. The contact surface between the end face of the inflation distribution plate 23 and the inner wall of the inflation seat 12 is a sealing surface, which is lubricated with grease.

[0023] In use: After connecting this device to the three-way slag discharge pipe, it is sleeved on the drill rod. The three-way slag discharge pipe is installed at the edge of the drill hole to seal the edge of the drill hole. An external air inflation device is connected to the air inflation hole 14. The airflow enters the distribution groove of the air inflation distribution plate 23 from the air inflation hole 14, and then enters the interior of the air inflation sealing capsule 22 from several air inflation pipes 24. The inner wall of the air inflation sealing capsule 22 expands and hugs the drill rod. With the sealing ring at the sealing sleeve 25, the gas entering this device will not leak from the gaps around the drill rod. After the drill rod rotates, the protective cylinder 21, the air inflation sealing capsule 22, the air inflation distribution plate 23, and the sealing sleeve 25 rotate accordingly. During this process, the air inflation sealing capsule 22 will not move relative to any other parts, thus improving its service life.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic rotor-type drill pipe sealing device, characterized in that: The device is fitted onto the drill rod and has a three-way slag discharge pipe sealed at the lower end. The device includes an external stator assembly (1) and an internal rotor assembly (2). The rotor assembly (2) is rotatably mounted inside the stator assembly (1). The stator assembly (1) is provided with an air inlet (14), and the rotor assembly (2) is provided with an air-filled sealing capsule (22). After being inflated, the air-filled sealing capsule (22) wraps around the drill rod and rotates with it.

2. The pneumatic rotor-type drill pipe sealing device according to claim 1, characterized in that: The stator assembly (1) includes a mounting housing (11), an air inlet seat (12) is provided on the top of the mounting housing (11), an air inlet (14) is provided on the air inlet seat (12), and a connecting seat (15) is provided at the bottom of the mounting housing (11) for connecting to a three-way slag discharge pipe.

3. The pneumatic rotor-type drill pipe sealing device according to claim 2, characterized in that: A drill rod sleeve (13) is provided inside the through hole of the air-filled seat (12).

4. The pneumatic rotor-type drill pipe sealing device according to claim 1, characterized in that: The rotor assembly (2) includes a protective cylinder (21), and the inflatable sealing capsule (22) is disposed inside the protective cylinder (21). A sealing sleeve (25) is provided at the bottom end of the protective cylinder (21). The sealing sleeve (25) presses against the inflatable sealing capsule (22). The sealing sleeve (25) is located inside the bottom connecting seat (15) of the stator assembly (1). A sealing ring is provided at the gap between the sealing sleeve (25) and the connecting seat (15).

5. The pneumatic rotor-type drill pipe sealing device according to claim 1, characterized in that: A positioning wheel (3) is provided between the stator assembly (1) and the rotor assembly (2).

6. The pneumatic rotor-type drill pipe sealing device according to claim 1, characterized in that: An inflation distribution plate (23) is provided between the inflation hole (14) and the inflation sealing capsule (22). The inflation distribution plate (23) is rotatably disposed in the stator assembly (1). An inflation pipe (24) is provided on the inflation distribution plate (23). The inflation pipe (24) is inserted into the air inlet of the inflation sealing capsule (22).

7. The pneumatic rotor-type drill pipe sealing device according to claim 6, characterized in that: The number of air inlets of the inflation tube (24) and the inflation sealing capsule (22) is not less than three, and an annular diversion groove is provided on the end face of the inflation diversion plate (23) near the inflation hole (14).

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