Pneumatic rotor type drilling rod sealing device

Abstract

This utility model discloses an inflatable rotor-type drilling rod sealing device. The drill rod sealing assembly seals the gap between the drill rod and the sleeve, effectively preventing gas from spraying out or overflowing from the gap between the coal wall and the drill rod during drilling. It is suitable for drill rods of various shapes such as triangular, grooved, and spiral. The inflatable sealing capsule in the drill rod sealing assembly wraps around the drill rod after inflation, preventing it from contacting and rubbing against the inner wall of the borehole during drilling, greatly improving its service life and eliminating the need for frequent replacement, thus improving drilling efficiency and reducing operating costs. The borehole sealing assembly is used for borehole sealing. The inflatable rubber sleeve at the lower end extends into the borehole and expands after inflation, preventing gas leakage from the edge of the borehole. The operation is simple. The sealing method of this device is passive, requiring no personnel on duty, which is convenient. The installation distance between the drill rod sealing assembly and the borehole sealing assembly can be adjusted by the telescopic tube to adapt to the installation requirements under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, specifically to an air-filled rotor-type borehole drill rod 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 can be ejected from the drill holes, affecting operational safety. Patent CN116357257A discloses a device and method for drilling blowout prevention holes in gas extraction. During normal drilling, the straight rods are moved away from the flange. When a blowout occurs or there are signs of a blowout, the two straight rods are rotated to be parallel to the main pipe. Under the action of the lever principle, the two straight rods exert force on the flange. The sealing rubber sleeve deforms and squeezes the outer wall of the drill rod after being stressed, thereby achieving a seal. This device seals the drill rod actively, but requires personnel to be on duty, which is not very convenient. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an inflatable rotor-type drilling rod 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 drilling rod sealing device, comprising a drill rod sealing assembly, a telescopic tube, and a drilling sealing assembly connected sequentially by flanges. In use, the drill rod passes through the drill rod sealing assembly, the telescopic tube, and the drilling sealing assembly. The bottom end of the drilling sealing assembly seals the gaps around the drill hole, and the drill rod sealing assembly seals the gaps around the drill rod to prevent gas leakage.

[0005] As a preferred technical solution of this utility model, the drill pipe sealing assembly includes an outer stator assembly and an inner rotor assembly. The rotor assembly is rotatably disposed within the stator assembly. The stator assembly is provided with a first air inlet, and the rotor assembly is provided with an air-filled sealing capsule. After being inflated, the air-filled sealing capsule wraps around the drill pipe and rotates with it.

[0006] As a preferred technical solution of this utility model, the stator assembly includes a mounting housing, an air inflator seat is provided on the top of the mounting housing, a first air inflator is provided on the air inflator seat, a connecting seat is provided at the bottom of the mounting housing, and a drill rod sleeve is provided in the through hole of the air inflator seat. 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. An inflation distribution plate is provided between the first inflation port 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. The number of air inlets of the inflation pipe and the inflation sealing capsule is not less than three. An annular distribution groove is provided on the end face of the inflation distribution plate near the first inflation port.

[0007] As a preferred embodiment of this utility model, a positioning wheel is provided between the stator assembly and the rotor assembly.

[0008] As a preferred technical solution of this utility model, the drilling sealing assembly includes a main body and a slag discharge pipe and an exhaust pipe disposed on the main body. A sleeve is disposed at the bottom of the main body, a sealing ring is disposed at the top of the sleeve, an inflatable rubber sleeve is fitted on the sleeve, and a second air inlet and a corresponding air inlet are disposed on the sealing ring. The air inlet is located inside the inflatable rubber sleeve.

[0009] As a preferred embodiment of this utility model, the inflatable rubber sleeve is a cone shape with a larger top and a smaller bottom, and the top edge of the inflatable rubber sleeve is rolled inward to form a sealing surface that contacts the sealing ring.

[0010] As a preferred technical solution of this utility model, the lower end of the inflatable rubber sleeve is tied to the sleeve by a clamping ring, and a pressure ring is provided on the outside of the inflatable rubber sleeve. When in use, the pressure ring presses the top of the inflatable rubber sleeve so that the top of the inflatable rubber sleeve is in close contact with the sealing ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The drill rod sealing assembly seals the gap between the drill rod and the sleeve, effectively preventing gas from spraying out or overflowing from the gap between the coal wall and the drill rod during drilling. It is suitable for drill rods of various shapes such as triangular, grooved, and spiral. The inflatable sealing capsule in the drill rod sealing assembly wraps around the drill rod after inflation, and will not come into contact with or rub against the inner wall of the borehole during drilling, which greatly improves its service life, eliminates the need for frequent replacement, improves drilling efficiency, and reduces operating costs. The borehole sealing assembly is used for borehole sealing. The air-filled rubber sleeve that extends into the borehole expands after inflation to prevent gas from leaking from the edge of the borehole. It is easy to operate. The sealing method of this device is passive, requiring no personnel to operate, which is quite convenient. A telescopic tube is installed between the drill rod sealing assembly and the borehole sealing assembly. The installation distance between the drill rod sealing assembly and the borehole sealing assembly can be adjusted through the telescopic tube to adapt to the installation requirements under different working conditions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the drill pipe sealing assembly structure in this utility model; Figure 3 This is a schematic diagram of the external structure of the drill pipe sealing assembly of this utility model; Figure 4 This is a schematic diagram of the sealing sleeve structure of this utility model; Figure 5 This is a schematic diagram of the structure of the air-filled diverter plate of this utility model; Figure 6 This is a schematic diagram of the drilling sealing assembly structure in this utility model; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point A in the middle.

[0013] In the picture: 1. Drill pipe sealing assembly; 11 Stator assembly, 111 Mounting housing, 112 Inflation seat, 113 Drill rod sleeve, 114 First inflation hole, 115 Connecting seat; 12 Rotor assembly, 121 Protective cylinder, 122 Inflatable sealing capsule, 123 Inflatable distributor plate, 124 Inflatable pipe, 125 Sealing sleeve; 13 positioning wheels; 2. Expansion tube; 3 Drilling sealing assembly, 31 Main body, 32 Slag discharge pipe, 33 Exhaust pipe, 34 Sleeve, 35 Sealing ring, 36 Inflatable rubber sleeve, 37 Compression ring, 38 Clamping ring, 39 Second inflation hole, 310 Air inlet. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-7 This utility model provides a technical solution: an inflatable rotor type drilling rod sealing device, comprising a drill rod sealing assembly 1, a telescopic tube 2 and a drilling sealing assembly 3 connected in sequence by flanges; The drill pipe sealing assembly 1 includes an outer stator assembly 11 and an inner rotor assembly 12. The rotor assembly 12 is rotatably disposed within the stator assembly 11. The stator assembly 11 is provided with a first air inlet 114. The rotor assembly 12 is provided with an air-filled sealing capsule 122. After being inflated, the air-filled sealing capsule 122 wraps around the drill pipe and rotates with it. The stator assembly 11 includes a mounting housing 111, an inflation seat 112 is provided on the top of the mounting housing 111, a first inflation hole 114 is provided on the inflation seat 112, a connecting seat 115 is provided at the bottom of the mounting housing 111, and a drill rod sleeve 113 is provided in the through hole of the inflation seat 112. The rotor assembly 12 includes a protective cylinder 121, an inflatable sealing capsule 122 disposed inside the protective cylinder 121, a sealing sleeve 125 disposed at the bottom end of the protective cylinder 121, the sealing sleeve 125 pressing against the inflatable sealing capsule 122, the sealing sleeve 125 being located inside the bottom connecting seat 115 of the stator assembly 11, and a sealing ring being disposed at the gap between the sealing sleeve 125 and the connecting seat 115; An inflation distribution plate 123 is provided between the first inflation port 114 and the inflation sealing capsule 122. The inflation distribution plate 123 is rotatably disposed in the stator assembly 11. An inflation pipe 124 is provided on the inflation distribution plate 123. The inflation pipe 124 is inserted into the air inlet of the inflation sealing capsule 122. The number of air inlets of the inflation pipe 124 and the inflation sealing capsule 122 is not less than three. An annular distribution groove is provided on the end face of the inflation distribution plate 123 near the first inflation port 114. A positioning wheel 13 is provided between the stator assembly 11 and the rotor assembly 12. The positioning wheel 13 supports and positions the protective cylinder 121 to ensure the coaxiality of the protective cylinder 121 and the mounting housing 111 during installation, thereby improving the stability of the rotor assembly 12 during rotation. The drilling sealing assembly 3 includes a main body 31 and a slag discharge pipe 32 and an exhaust pipe 33 disposed on the main body 31. A sleeve 34 is disposed at the bottom of the main body 31, a sealing ring 35 is disposed at the top of the sleeve 34, an inflatable rubber sleeve 36 is fitted on the sleeve 34, and a second air inlet 39 and a corresponding air inlet 310 are disposed on the sealing ring 35. The air inlet 310 is located inside the inflatable rubber sleeve 36. The inflatable rubber sleeve 36 is a cone shape that is larger at the top and smaller at the bottom. The top edge of the inflatable rubber sleeve 36 is rolled inward to form a sealing surface that contacts the sealing ring 35. The lower end of the inflatable rubber sleeve 36 is tied to the sleeve 34 by a clamping ring 38. A pressure ring 37 is fitted on the outside of the inflatable rubber sleeve 36. When in use, the pressure ring 37 presses the top of the inflatable rubber sleeve 36 so that the top of the inflatable rubber sleeve 36 is in close contact with the sealing ring 35.

[0016] During use, the drill rod passes through the drill rod sealing assembly 1, the telescopic tube 2, and the borehole sealing assembly 3. The bottom end of the borehole sealing assembly 3 seals the gaps around the borehole, and the drill rod sealing assembly 1 seals the gaps around the drill rod to prevent gas leakage. An external inflation device is connected to the first inflation port 114. Airflow enters the distribution groove of the inflation distribution plate 123 from the first inflation port 114, and then enters the interior of the inflation sealing capsule 122 from several inflation pipes 124. The inner wall of the inflation sealing capsule 122 expands and hugs the drill rod. With the sealing ring at the sealing sleeve 125, the gas entering the device will not leak from the gaps around the drill rod. After the drill rod rotates, the protective cylinder 121, the inflation sealing capsule 122, the inflation distribution plate 123, and the sealing sleeve 125 rotate accordingly. The inflation sealing capsule 122 will not move relative to any other parts during this process, which improves its service life. The sleeve 34 is inserted into the pre-drilled hole. At this time, the clamping ring 37 presses the top of the inflatable sleeve 36, so that the top of the inflatable sleeve 36 is in close contact with the sealing ring 35 to form a sealing surface. The inflatable sleeve 36 is inflated by connecting the second inflation hole 39 to the external inflation device. The inflatable sleeve 36 expands and blocks the inner wall of the hole, thereby sealing the hole and preventing gas from spraying out from the hole.

[0017] 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 sealing device for drilling rods, characterized in that: It includes a drill pipe sealing assembly (1), a telescopic pipe (2), and a borehole sealing assembly (3) connected in sequence via flanges. The drill pipe sealing assembly (1) includes an outer stator assembly (11) and an inner rotor assembly (12). The rotor assembly (12) is rotatably disposed inside the stator assembly (11). The stator assembly (11) is provided with a first air inlet (114). The rotor assembly (12) is provided with an air-filled sealing capsule (122). After being inflated, the air-filled sealing capsule (122) wraps around the drill pipe and rotates with it. The drilling sealing assembly (3) includes a main body (31) and a slag discharge pipe (32) and an exhaust pipe (33) disposed on the main body (31). A sleeve (34) is disposed at the bottom of the main body (31), and a sealing ring (35) is disposed at the top of the sleeve (34). An inflatable rubber sleeve (36) is fitted on the sleeve (34). A second air inlet (39) and a corresponding air inlet (310) are disposed on the sealing ring (35). The air inlet (310) is located inside the inflatable rubber sleeve (36). When in use, the drill rod passes through the drill rod sealing assembly (1), the telescopic tube (2) and the borehole sealing assembly (3). The bottom end of the borehole sealing assembly (3) seals the gaps around the borehole, and the drill rod sealing assembly (1) seals the gaps around the drill rod to prevent gas leakage.

2. The pneumatic rotor-type drilling rod sealing device according to claim 1, characterized in that: The stator assembly (11) includes a mounting housing (111), an air inflator (112) is provided on the top of the mounting housing (111), a first air inflator (114) is provided on the air inflator (112), a connecting seat (115) is provided at the bottom of the mounting housing (111), and a drill rod sleeve (113) is provided in the through hole of the air inflator (112). The rotor assembly (12) includes a protective cylinder (121), the inflatable sealing capsule (122) is disposed inside the protective cylinder (121), a sealing sleeve (125) is provided at the bottom end of the protective cylinder (121), the sealing sleeve (125) presses against the inflatable sealing capsule (122), the sealing sleeve (125) is located inside the bottom connecting seat (115) of the stator assembly (11), and a sealing ring is provided at the gap between the sealing sleeve (125) and the connecting seat (115); An inflation distribution plate (123) is provided between the first inflation hole (114) and the inflation sealing capsule (122). The inflation distribution plate (123) is rotatably disposed in the stator assembly (11). An inflation pipe (124) is provided on the inflation distribution plate (123). The inflation pipe (124) is inserted into the air inlet of the inflation sealing capsule (122). The number of air inlets of the inflation pipe (124) and the inflation sealing capsule (122) is not less than three. An annular distribution groove is provided on the end face of the inflation distribution plate (123) near the first inflation hole (114).

3. The pneumatic rotor-type drilling rod sealing device according to claim 1, characterized in that: A positioning wheel (13) is provided between the stator group (11) and the rotor group (12).

4. The air-filled rotor-type drilling rod sealing device according to claim 1, characterized in that: The inflatable sleeve (36) is a cone shape with a larger top and a smaller bottom. The top edge of the inflatable sleeve (36) is rolled inward to form a sealing surface that contacts the sealing ring (35).

5. The pneumatic rotor-type drilling rod sealing device according to claim 1, characterized in that: The lower end of the inflatable rubber sleeve (36) is tied to the sleeve (34) by a clamping ring (38). A pressure ring (37) is fitted on the outside of the inflatable rubber sleeve (36). When in use, the pressure ring (37) presses the top of the inflatable rubber sleeve (36) so that the top of the inflatable rubber sleeve (36) is in close contact with the sealing ring (35).

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