A high-pressure gas continuous circulation device for directional hole drilling in coal mines

Abstract

The present invention discloses a high-pressure gas continuous circulation device for directional hole drilling in coal mines, comprising an outer shell, an inner tube body and a ball valve, wherein the ball valve is located inside the outer shell; the outer shell comprises: a pair of half shells that are detachably buckled and sealed and fixedly connected, each half shell comprising a half shell and a half ring three sealed and fixedly connected to both ends of the half shell; an extrusion ring, which is detachably sealed and fixedly connected to the inner wall of the half ring three at one end of the half shell, and the extrusion ring and the half ring three are coaxial. Beneficial effects: The high-pressure gas continuous circulation device for directional hole drilling in coal mines of the present application achieves the technical effect of not stopping the air supply to the hole during the drill rod connection process, and the air pressure in the hole is stable and does not fluctuate during the drill rod connection process, and there is no need to re-establish the pressure, and there will be no falling off of the hole wall and water accumulation in the hole, eliminating the risk of the drill rod getting stuck and the air compressor burning, and solving the problem of large rotation resistance of the drill rod.

Description

Technical Field

[0001] The invention relates to the field of underground coal mine drilling, in particular to a high-pressure gas continuous circulation device for directional hole drilling in underground coal mines. Background Art

[0002] When directional drilling is carried out underground in a coal mine, when the depth of the hole to be drilled is greater than the length of the drill rod, it is necessary to add a drill rod. At this time, the air supply to the hole can only be stopped, and the air supply to the hole can be resumed after the drill rod is added. The drill rod addition takes a long time, resulting in serious water accumulation in the hole. Moreover, after the air supply to the hole is stopped, the air pressure fluctuation in the hole causes the hole wall objects to fall off. The fallen hole wall objects mixed with the accumulated water will increase the rotational resistance of the drill rod, causing the drill rod to get stuck, the air compressor to burn out and other problems. Therefore, it is an industry consensus to reduce the air pressure fluctuation in the hole and shorten the drill rod addition time. However, it is not easy to shorten the drill rod addition time. The disassembly and assembly of the power mechanism and the air supply unit, the alignment and positioning of the drill rod, and the locking and fixing all require time. Even for technicians who are skilled in adding and connecting operations, it takes at least 5 minutes, which is still too long. There will still be obvious water accumulation and hole wall detachment in the hole. Therefore, how to reduce the air pressure fluctuation in the hole and shorten the drill rod addition time is a difficult problem that technical personnel in the industry urgently need to solve.

[0003] In recent years, some technical personnel in the industry have developed a high-pressure gas continuous circulation device for directional hole drilling in coal mines and applied for a patent. As shown in the patent with publication number CN119244183A, the above-mentioned high-pressure gas continuous circulation device replenishes high-pressure gas into the hole during the process of adding drill rods, shortening the time interval for stopping air supply to the borehole. However, it is necessary to first remove the connecting rod between the drill rod and the power head, then install the high-pressure gas continuous circulation device, and then close the ball valve before starting to replenish high-pressure gas into the borehole. When the new drill rod is moved into place and prepared to be connected with the drill rod inserted into the borehole, it is also necessary to stop replenishing high-pressure gas into the borehole and remove the high-pressure gas continuous circulation device. Circulation device, the high-pressure gas continuous circulation device needs to remove the connecting rod when connected to the drill pipe, and the high-pressure gas continuous circulation device needs to be removed when the drill pipe is added. It can be seen that the above-mentioned high-pressure gas continuous circulation device only shortens the time interval for stopping the air supply to the hole, reduces the time for re-establishing pressure by adding the drill pipe, reduces the water accumulation in the hole and the debris falling off the hole wall, and to a certain extent reduces the rotational resistance of the drill pipe and the risk of the drill pipe getting stuck and the air compressor burning. However, the water accumulation in the hole and the debris falling off the hole wall still exist, the air pressure fluctuation in the hole still exists, the hole wall debris continues to fall off and water accumulation in the hole will still occur, the risk of the drill pipe getting stuck and the air compressor burning and the problem of large rotational resistance of the drill pipe still exists and has not been fundamentally solved. Summary of the invention

[0004] The main purpose of the present invention is to propose a high-pressure gas continuous circulation device for directional hole drilling in coal mines, aiming to solve the problem that the existing high-pressure gas continuous circulation device for directional hole drilling in coal mines fails to achieve the technical effect of not stopping the air supply to the hole during the drill rod connection process, the air pressure in the hole still fluctuates, the hole wall materials continue to fall off and water accumulates in the hole, the risk of drill rod jamming, air compressor burning and the large rotational resistance of the drill rod still exist.

[0005] In order to solve the above problems, the present invention proposes a high-pressure gas continuous circulation device for directional hole drilling in coal mines, comprising an outer shell, an inner tube body and a ball valve, wherein the ball valve is located inside the outer shell;

[0006] The housing comprises:

[0007] A pair of half shells that are detachably buckled and sealed and fixedly connected, each half shell comprising a half shell and half rings three that are sealed and fixed at both ends of the half shell;

[0008] An extrusion ring is detachably sealed and fixedly connected to the inner wall of the half ring three at one end of the half shell, the extrusion ring and the half ring three are coaxial, and the inner circumference of the extrusion ring protrudes toward the center of the extrusion ring to form a convex ring;

[0009] The inner tube body comprises:

[0010] A pair of half-tube bodies connected in a detachable buckle-sealed manner;

[0011] The sealing belt is tightly wound and fixed on the outer circumference of a pair of half-tube bodies to form a sealing sleeve, the extrusion ring is tightly sleeved on the sealing sleeve and is coaxial with the sealing sleeve, the convex ring squeezes the outer circumference of the sealing sleeve and forms an annular indentation on the outer circumference, and the extrusion ring moves closely against the outer circumference of the sealing sleeve;

[0012] The half ring 1 and the half ring 2 are respectively arranged on the outer circumferential surfaces of the axial ends of the half tube body and are coaxial with the half tube body. The half ring 1 is fixedly connected to the half tube body, and the half ring 2 is screwed to the half tube body. The axial ends of the sealing sleeve are respectively in contact with the half ring 1 and the half ring 2. There is a pair of the half ring 1 and the half ring 2, which are respectively arranged on a pair of half tube bodies. The pair of the half ring 1 is detachably fixedly connected, and the pair of the half ring 2 is detachably fixedly connected.

[0013] The ball valve comprises:

[0014] A pair of removable buckled hemispherical shells sealed and fixedly connected, each hemispherical shell is coaxially sealed and fixedly connected to a half tube body;

[0015] A pair of hemispheres that are detachably buckled and sealed and fixedly connected are arranged in a pair of hemisphere shells and are slidably sealed and connected to the inner wall of the hemisphere shells. The hemispheres are provided with half holes, which are through holes with a hole diameter larger than the inner diameter of the half tube body. The hemispheres can rotate to make the half holes coaxial with the half tube body and to make both ends of the half holes sealed by the inner wall of the hemisphere shells.

[0016] The motor is fixedly connected to the outer wall of the hemispherical shell and is connected to the hemispherical transmission to drive the hemispherical shell to rotate.

[0017] In one embodiment, a plurality of fixing rods are inserted into the sealing belt along the axial direction of the sealing sleeve and are centrally symmetrically distributed with the central axis of the sealing sleeve as the center.

[0018] In one embodiment, an air inlet hole and a threading hole are provided in the semi-tube body.

[0019] In one embodiment, a pair of hemispherical shells are arranged front and back, and a pair of hemispheres are arranged up and down, and the motor drives the pair of hemispheres to rotate around a horizontal axis;

[0020] A sealing ring is fixedly and sealingly mounted on the outer spherical surface of the hemisphere at the upper end. The inner diameter of the sealing ring is larger than the inner diameter of the semi-tube body. The hemisphere rotates to drive the sealing ring to be coaxial with the semi-tube body.

[0021] In one embodiment, a sealing half ring is closely disposed on the inner side surface of the half ring three, and a sealing half ring is also closely disposed on the inner side surface of the end of the half tube body away from the ball valve.

[0022] In one embodiment, a pair of half-tubes are coaxially sealed and fixedly installed with a drill pipe, one end of the drill pipe is coaxially fixedly connected with a strong blowing nipple, one end of the strong blowing nipple away from the drill pipe is coaxially fixedly connected with an air screw motor, and one end of the air screw motor away from the strong blowing nipple is coaxially fixedly connected with a drill bit;

[0023] The other end of the drill pipe is coaxially fixedly connected with a connecting rod, which movably penetrates the ball valve and is detachably sealed and fixedly connected to the inner wall of the half ring three at the other end of the half shell. A power head and an air blower are arranged at the end of the connecting rod away from the drill pipe.

[0024] In one embodiment, the drill rod can movably penetrate the ball valve and be detachably sealed and fixedly connected to the inner wall of the half ring three at the other end of the half shell.

[0025] In one embodiment, the half shell and the half ring are integrally arranged, and the hemispherical shell and the half tube are integrally arranged.

[0026] Beneficial effects: The high-pressure gas continuous circulation device for directional hole drilling in underground coal mines of the present application achieves the technical effect of not stopping the air supply to the hole during the drill rod connection process. During the drill rod connection process, the air pressure in the hole is stable and does not fluctuate. There is no need to re-establish the pressure, and there will be no falling of hole wall materials and water accumulation in the hole. The risk of drill rod jamming and air compressor burning is eliminated, and the problem of large rotational resistance of the drill rod is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a front view of a high-pressure gas continuous circulation device for directional hole drilling in coal mines according to the present invention;

[0029] Figure 2 yes Figure 1 Schematic diagram after removing one half shell;

[0030] Figure 3 It is a right view of a high-pressure gas continuous circulation device for directional hole drilling in coal mines according to the present invention;

[0031] Figure 4 yes Figure 2 A schematic diagram after removing one half of the tube body, which also shows a cross-sectional view of the extrusion ring, the sealing sleeve and the upper and lower pairs of hemispheres;

[0032] Figure 5 It is a structural schematic diagram of the sealing sleeve of the present invention;

[0033] Figure 6 Is a schematic diagram of the structure of the sealing tape of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the sealing half ring of the present invention;

[0035] Figure 8 It is a structural schematic diagram of a half-tube body of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of the semi-ring 2 and the semi-ring 1 of the present invention;

[0037] Fig.10 This is a schematic diagram of the use of a high-pressure gas continuous circulation device for directional hole drilling in coal mines. Figure 1 ;

[0038] Fig.11This is a schematic diagram of the use of a high-pressure gas continuous circulation device for directional hole drilling in coal mines. Figure 2 ;

[0039] Fig.12 This is a schematic diagram of the use of a high-pressure gas continuous circulation device for directional hole drilling in coal mines. Figure 3 .

[0040] The following are the descriptions of the reference numerals:

[0041] 1. Half-tube body; 2. Bolt seat plate one; 3. Hemispherical shell; 4. Bolt seat plate two; 5. Hemisphere; 6. Sealing ring; 7. Sealing belt; 8. Fixing rod; 9. Half ring one; 10. Half ring two; 11. Extrusion ring; 12. Half shell; 13. Bolt seat plate three; 14. Threading hole; 15. Air inlet hole; 16. Half hole; 17. Sealing half ring; 18. Drill rod; 19. Strong blowing short section; 20. Air screw motor; 21. Connecting rod; 22. Power head; 23. Blower; 24. Motor; 25. Half ring three; 26. Convex ring; 27. Sealing sleeve; 28. Annular indentation. DETAILED DESCRIPTION

[0042] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present invention proposes a high-pressure gas continuous circulation device for directional hole drilling in coal mines. The high-pressure gas continuous circulation device for directional hole drilling in coal mines achieves the technical effect of not stopping the air supply to the hole during the connection process of the drill rod 18. During the connection process of the drill rod 18, the air pressure in the hole is stable and does not fluctuate. There is no need to re-establish the pressure, and there will be no falling off of the hole wall and water accumulation in the hole. The risk of the drill rod 18 getting stuck and the air compressor burning out is eliminated, and the problem of large rotational resistance of the drill rod 18 is solved.

[0047] Specifically, in one embodiment of the invention, Figure 1-Figure 4 As shown, the high-pressure gas continuous circulation device for directional hole drilling in underground coal mines includes an outer shell, an inner tube body and a ball valve, and the ball valve is located inside the outer shell.

[0048] Specifically, in this embodiment, if Figure 1-Figure 4 As shown, the housing comprises: a pair of half shells and an extrusion ring 11 that are detachably buckled and sealed and fixedly connected, each half shell comprises a half shell 12 and a half ring 25 that is sealed and fixedly connected to both ends of the half shell 12. Preferably, the half shell 12 and the half ring 25 are integrally arranged. A pair of half shells that are detachably buckled and sealed and fixedly connected can be connected in the following manner, such as Figure 1-Figure 4 As shown, a bolt seat plate three 13 is fixedly installed on the half shell 12 and the half ring three 25. After a pair of half shells are aligned and buckled together, the pair of bolt seat plates three 13 are fixedly connected by bolts, so that a pair of half shells can be detachably fixedly connected. In addition, when a pair of half shells are aligned and buckled, a sealing gasket is arranged between the mutually aligned and contacting surfaces of a pair of half shells 12 and a pair of half rings three 25, so that after the bolts are tightened, the pair of half shells are sealed and fixedly connected. This sealing form is common knowledge. Subsequently, a pair of half tubes 1, a pair of hemispherical shells 3, and a pair of hemispheres 5 also adopt this sealing form, so it will not be repeated.

[0049] In this embodiment, if Figure 1-Figure 4As shown, the extrusion ring 11 is a whole circular ring, and the extrusion ring 11 is detachably sealed and fixedly connected to the inner wall of the half ring three 25 at one end of the half shell 12. The detachable sealed and fixed connection means that after a pair of half rings 25 are aligned and fixedly connected, the extrusion ring 11 is clamped and fixedly connected to achieve fixed connection, and after a pair of half rings 25 are disassembled, the half ring three 25 is separated from the extrusion ring 11, and the Figure 7 The sealing half ring 17 shown is installed on the inner side of the half ring three 25, and then a pair of half rings 25 are aligned and fixedly connected with bolts to achieve a pair of half rings 25 and a sealing and fixed connection with the extrusion ring 11, and the sealing half ring 17 is located between the half ring three 25 and the extrusion ring 11. The extrusion ring 11 and the half ring three 25 are coaxial, and the inner circumference of the extrusion ring 11 is raised toward the center of the extrusion ring 11 to form a convex ring 26. This design can enhance the sliding sealing connection effect between the extrusion ring 11 and the sealing sleeve 27.

[0050] Specifically, Figure 1-Figure 4 As shown, the inner tube body comprises: a pair of half tube bodies 1, a sealing belt 7, a half ring 1 9 and a half ring 2 10 which are fixedly connected and can be detachably buckled. Figure 8 As shown, a pair of half-tube bodies 1 are both provided with bolt seat plates 2, and the pair of half-tube bodies 1 are fixedly connected by fixing the pair of bolt seat plates 2 with bolts.

[0051] In this embodiment, if Figure 1-Figure 4 As shown, the sealing tape 7 is tightly wound and detachably fixed on the outer circumference of a pair of half-tube bodies 1 to form a sealing sleeve 27. For example, a viscous liquid can be used to tightly wind the sealing tape 7 and stick it to the outer circumference of a pair of half-tube bodies 1. Subsequently, a drug is used to remove the viscous liquid so that the sealing tape 7 can be removed from the outer circumference of the half-tube body 1. Of course, in other embodiments, the viscous liquid may not be used, and the sealing sleeve 27 may be fixed by a plurality of fixing rods 8 so that the sealing sleeve 27 is tightly sleeved on the outer circumference of the half-tube body 1. Subsequently, the fixing rods 8 are pulled out to remove the sealing tape 7 from the outer circumference of the half-tube body 1. The structure of the sealing tape 7 is as shown in FIG. Figure 6 As shown, the sealing sleeve 27 has a structure as shown in Figure 5 As shown, the sealing belt 7 is tightly wound on the outer circumferential surface of a pair of half-tube bodies 1 to form a sealing sleeve 27. Figure 4 and Figure 5As shown, a plurality of fixing rods 8 are inserted into the sealing belt 7 along the axial direction of the sealing sleeve 27 and are centrally symmetrically distributed with the central axis of the sealing sleeve 27 as the center. The fixing rods 8 fix the sealing belt 7 to prevent it from loosening so that the inner circumference of the sealing sleeve 27 cannot be closely attached to the outer circumference of the pair of half-tube bodies 1. The purpose of tightly wrapping and detachably fixing the sealing belt 7 on the outer circumference of the pair of half-tube bodies 1 is to ensure that the subsequent extrusion ring 11 is reliably connected to the sealing sleeve 27 by sliding and sealing, and to facilitate the removal of the pair of half-tube bodies 1 after the sealing belt 7 is removed from the outer circumference of the half-tube body 1.

[0052] In this embodiment, if Figure 4 As shown, the extrusion ring 11 is tightly sealed on the sealing sleeve 27 and is coaxial with the sealing sleeve 27. The convex ring 26 squeezes the outer circumferential surface of the sealing sleeve 27 and forms an annular indentation 28 on the outer circumferential surface of the sealing sleeve 27. This design ensures that when the extrusion ring 11 moves closely against the outer circumferential surface of the sealing sleeve 27, the two can still maintain a reliable sliding seal connection, such as when the extrusion ring 11 moves axially or rotates, or moves axially while rotating.

[0053] In this embodiment, the sealing belt 7 is made of rubber.

[0054] In this embodiment, if Figure 1-Figure 4 As shown, the semi-ring 1 9 and the semi-ring 2 10 are respectively arranged on the outer circumferential surfaces of the axial ends of the semi-tube body 1 and are coaxial with the semi-tube body 1. The semi-ring 1 9 is fixedly connected to the semi-tube body 1, and the semi-ring 2 10 is screwed to the semi-tube body 1, such as threaded connection. After a pair of semi-tube bodies 1 are buckled and fixedly connected, a pair of semi-rings 1 9 can be detachably fixedly connected to form a ring, and a pair of semi-rings 2 10 can also be detachably fixedly connected to form a ring. A pair of semi-rings 2 10 is screwed to the outer wall of a pair of semi-tube bodies 1, and a pair of semi-rings 2 10 can rotate along the axial direction of a pair of semi-tube bodies 1. The structures of the semi-rings 1 9 and the semi-rings 2 10 are as shown in FIG. Fig. 9 As shown, the structure of the half tube body 1 is as follows Figure 8 As shown, Figure 4 As shown, the axial ends of the sealing sleeve 27 are respectively in contact with the half ring 1 9 and the half ring 2 10. There are a pair of half rings 1 9 and 10, which are respectively arranged on a pair of half tube bodies 1. The pair of half rings 2 10 rotates to cooperate with the pair of half rings 1 9 to clamp and fix the sealing sleeve 27 in the axial direction, ensuring that the sealing belt 7 can be tightly wrapped around the outer circumferential surface of the pair of half tube bodies 1, ensuring that the subsequent extrusion ring 11 is reliably connected to the sealing sleeve 27 by sliding sealing.

[0055] Specifically, Figure 2 and Figure 4As shown, the ball valve comprises: a pair of hemispherical shells 3 that are detachably buckled and sealed and fixedly connected, a pair of hemispherical shells 5 that are detachably buckled and sealed and fixedly connected, and a motor 24. Each hemispherical shell 3 of the pair of hemispherical shells 3 that are detachably buckled and sealed and fixedly connected is coaxially sealed and fixedly connected to a half-tube body 1. Preferably, the hemispherical shell 3 and the half-tube body 1 are integrally arranged, as shown in FIG. Figure 4 As shown, a bolt seat plate 2 4 is provided on the hemispherical shell 3 , and a pair of bolt seat plates 2 4 are fixedly connected by bolts to achieve a pair of hemispherical shells 3 being sealed and fixedly connected.

[0056] In this embodiment, if Figure 4 As shown, a pair of hemispheres 5 that are detachably buckled and sealed and fixedly connected are arranged in a pair of hemisphere shells 3, and are slidingly sealed and connected to the inner wall of the hemisphere shells 3. A half hole 16 is provided on the hemisphere 5. After the pair of hemispheres 5 are aligned and sealed and fixedly connected, the pair of half holes 16 constitute a through hole. The aperture of the through hole is larger than the inner diameter of the half pipe body 1, so that the drill rod 18 and the connecting rod 21 can movably pass through the through hole, which is convenient for the drill rod 18 to be connected. The hemisphere 5 can rotate to make the half hole 16 coaxial with the half pipe body 1. At this time, the drill rod 18 and the connecting rod 21 can movably pass through the through hole. The hemisphere 5 can rotate to make the two ends of the half hole 16 sealed by the inner wall of the hemisphere shell 3. At this time, the high-pressure gas in the half pipe body 1 cannot flow to the left and pass through the ball valve to overflow. This design realizes that high-pressure gas can continue to be injected into the drill rod 18 when the drill rod 18 is connected, and there is no need to worry about the high-pressure gas from Figure 10-12 The left end of the drill rod 18 in the drill pipe escapes.

[0057] In this embodiment, if Figure 2 As shown, the motor 24 is fixedly connected to the outer wall of the hemispherical shell 3 and is transmission-connected to the hemisphere 5 to drive the hemisphere 5 to rotate. Preferably, as Figure 10-12 As shown, a pair of hemispherical shells 3 are arranged front and back, and a pair of hemispherical shells 5 are arranged up and down. The motor 24 drives the pair of hemispherical shells 5 to rotate around the horizontal axis. The rotation axis of the motor 24 is perpendicular to the central axis of the semi-tube body 1. In this design, it is only necessary to seal and fix the sealing ring 6 on the outer spherical surface of the hemispherical shell 5 at the upper end, and make the inner diameter of the sealing ring 6 larger than the inner diameter of the semi-tube body 1 to achieve the sliding sealing connection between the pair of hemispherical shells 3 and the inner wall of the semi-spherical shell 3, and the two ends of the half hole 16 are sealed by the inner wall of the hemispherical shell 3. The sealing structure is simple, reliable and effective. Figure 4 As shown, when the motor 24 drives a pair of hemispheres 5 to rotate 90 degrees clockwise, the sealing ring 6 is coaxial with the half tube body 1, and the high-pressure gas in the half tube body 1 cannot escape from the gap between the hemisphere 5 and the hemisphere shell 3.

[0058] In this embodiment, in addition to the sealing half ring 17 being closely disposed on the inner side surface of the half ring 3 25, the inner side surface of the half pipe body 1 at one end away from the ball valve is also closely disposed with a sealing half ring 17. This design can achieve a sealed and fixed connection between the drill rod 18 and the inner wall of a pair of half pipe bodies 1. In addition, Figure 4 The inner side surface of the half ring 3 25 at the left end of the middle half shell 12 is also closely provided with a sealing half ring 17. Such a design can realize that the half ring 3 25 is sealed and fixedly connected to the drill rod 18 or the connecting rod 21.

[0059] In this embodiment, if Figure 2-Figure 4 As shown, the half tube body 1 is provided with an air inlet 15 and a threading hole 14. Figure 3 As shown, one end of the air inlet 15 and the threading hole 14 are both located on the end surface of the right end of the half tube body 1. Figure 4 As shown, the other end of the air inlet 15 is located on the inner wall of the left end of the half tube body 1. Figure 2 As shown, the other end of the threading hole 14 is located on the outer wall of the left end of the half tube body 1. With this design, the wire connected to the motor 24 in the housing can extend out of the housing through the threading hole 14 without being affected by the rotation of the housing. Similarly, high-pressure gas can enter through the air inlet 15. Figure 4 The high pressure gas then enters the drill pipe 18 from the left end of the middle half pipe 1, flows rightward in the drill pipe 18, and enters the strong blowing short section 19 and the air screw motor 20 in sequence. Figure 10-12 As shown, with this design, the air intake is not affected by the rotation of the housing.

[0060] In this embodiment, if Figure 10-12 As shown, a pair of half-tube bodies 1 are coaxially sealed and fixedly installed with a drill rod 18, the right end of the drill rod 18 is coaxially fixedly connected with a strong blowing nipple 19, the end of the strong blowing nipple 19 away from the drill rod 18 is coaxially fixedly connected with an air screw motor 20, and the end of the air screw motor 20 away from the strong blowing nipple 19 is coaxially fixedly connected with a drill bit. The strong blowing nipple 19, the air screw motor 20, and the drill bit belong to the prior art, and their functions and working principles have been disclosed in CN119244183A, which will not be repeated here.

[0061] In this embodiment, if Figure 10-12 As shown, the other end of the drill rod 18 is coaxially fixedly connected with a connecting rod 21, and the connecting rod 21 movably penetrates the ball valve and is detachably sealed and fixedly connected to the inner wall of the half ring 25 at the left end of the half shell 12. Fig.10 As shown, the outer shell moves leftward relative to the inner tube body through the extrusion ring 11, and the outer shell rotates to make the connecting rod 21 threadedly connected to the left end of the drill rod 18 rotate synchronously until it is separated from the left end of the drill rod 18. After the connecting rod 21 leaves the ball valve, Fig.11 As shown, the control motor 24 rotates to close the ball valve, and at this time, high-pressure gas can be input into the left end of the half pipe body 1 through the air inlet 15. The high-pressure gas will not escape from the ball valve, but can only flow to the right through the drill rod 18 and the strong blowing short section 19 to enter the air screw motor 20;

[0062] Next, loosen the half ring 25 at the left end of the half shell 12, remove the connecting rod 21, insert the new drill rod 18 into the shell from the half ring 25 at the left end of the half shell 12, and after the right end of the new drill rod 18 is close to the ball valve, tighten the half ring 25 at the left end of the half shell 12 so that the half ring 25 is sealed and fixedly connected to the drill rod 18, then connect the connecting rod 21 to the left end of the new drill rod 18, and install the power head 22 and the air blower 23. Fig.12 As shown, the shell can be turned to rotate in the opposite direction and move axially to the right, and the air supply device 23 and the ball valve can be opened at the same time. The air supply device 23 sends high-pressure gas into the new drill rod 18 through the connecting rod 21. After the high-pressure gas fills the interior of the shell, it flows to the right through the through hole of the ball valve and enters the drill rod 18 in the inner tube body, and then continues to flow to the right into the strong blowing short section 19 and the air screw motor 20. Driven by the shell, the new drill rod 18 moves to the right through the through hole of the ball valve and is screwed and fixedly connected to the left end of the drill rod 18 in the inner tube body, thereby realizing the connection of the drill rod 18. After the new drill rod 18 is screwed and sealed and fixedly connected to the left end of the drill rod 18 in the inner tube body, the high-pressure gas is stopped from being sent into the air inlet 15, and the high-pressure gas is injected into the drill rod 18 by the air supply device 23. It can be seen that Fig.10 The connecting rod 21 shown is moved leftward and separated from the drill rod 18. Fig.12 As shown, the new drill rod 18 is moved to the right and passes through the ball valve to be screwed and sealed and fixedly connected to the left end of the original drill rod 18. During this process, the high-pressure gas in the original drill rod 18 is not stopped from being supplied. Before the ball valve is opened, the high-pressure gas is input into the left end of the semi-tube body 1 through the air inlet 15. After the ball valve is opened, the high-pressure gas is input into the drill rod 18 at the left end of the semi-tube body 1 through the air inlet 15 and the air blower 23. After the new drill rod 18 is sealed and fixedly connected to the original drill rod 18, the air blower 23 inputs high-pressure gas into the drill rod 18, thereby achieving the technical effect of not stopping the supply of air to the borehole during the process of adding the drill rod 18. During the process of adding the drill rod 18, the air pressure in the borehole is stable and does not fluctuate. There is no need to re-establish the pressure. There will be no falling off of the borehole wall and water accumulation in the borehole. The risk of the drill rod 18 getting stuck and the air compressor burning out is eliminated, and the problem of the large rotational resistance of the drill rod 18 is solved. However, the high-pressure gas continuous circulation device shown in the patent with publication number CN119244183A needs to stop supplying air before the connecting rod is removed, and the air pressure in the borehole begins to drop. The high-pressure gas continuous circulation device cannot be added to the borehole until it is installed and the ball valve is closed. During this process, fluctuations occur in the borehole. Before the subsequent drill rod is connected and the high-pressure gas continuous circulation device is removed, the air supply is stopped again. After the drill rod is connected, the air supply is started again. During this process, fluctuations occur in the borehole again. During the entire drill rod connection process, the air pressure fluctuations occur twice in the borehole. Therefore, there will still be continuous shedding of hole wall materials and water accumulation in the hole. The risks of drill rod jamming and air compressor burning and the large rotational resistance of the drill rod still exist and have not been fundamentally solved.

[0063] In this embodiment, after the drill rod 18 is connected, the outer shell is first removed, then the extrusion ring 11 is removed from the sealing sleeve 27, and then the inner tube body and the ball valve are removed.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-pressure gas continuous circulation device for directional hole drilling in coal mines, characterized in that: It comprises an outer shell, an inner tube body and a ball valve, wherein the ball valve is located inside the outer shell; The housing comprises: A pair of half shells that are detachably buckled and sealed and fixedly connected, each half shell comprising a half shell and half rings three that are sealed and fixed at both ends of the half shell; An extrusion ring is detachably sealed and fixedly connected to the inner wall of the half ring three at one end of the half shell, the extrusion ring and the half ring three are coaxial, and the inner circumference of the extrusion ring protrudes toward the center of the extrusion ring to form a convex ring; The inner tube body comprises: A pair of half-tube bodies connected in a detachable and sealed manner; The sealing belt is tightly wound and fixed on the outer circumference of a pair of half-tube bodies to form a sealing sleeve, the extrusion ring is tightly sleeved on the sealing sleeve and is coaxial with the sealing sleeve, the convex ring squeezes the outer circumference of the sealing sleeve and forms an annular indentation on the outer circumference, and the extrusion ring moves closely against the outer circumference of the sealing sleeve; The half ring 1 and the half ring 2 are respectively arranged on the outer circumferential surfaces of the axial ends of the half tube body and are coaxial with the half tube body. The half ring 1 is fixedly connected to the half tube body, and the half ring 2 is screwed to the half tube body. The axial ends of the sealing sleeve are respectively in contact with the half ring 1 and the half ring 2. There is a pair of the half ring 1 and the half ring 2, which are respectively arranged on a pair of half tube bodies. The pair of the half ring 1 is detachably fixedly connected, and the pair of the half ring 2 is detachably fixedly connected. The ball valve comprises: A pair of removable buckled hemispherical shells sealed and fixedly connected, each hemispherical shell is coaxially sealed and fixedly connected to a half tube body; A pair of hemispheres that are detachably buckled and sealed and fixedly connected are arranged in a pair of hemisphere shells and are slidably sealed and connected to the inner wall of the hemisphere shells. The hemispheres are provided with half holes, which are through holes with a hole diameter larger than the inner diameter of the half tube body. The hemispheres can rotate to make the half holes coaxial with the half tube body and to make both ends of the half holes sealed by the inner wall of the hemisphere shells. The motor is fixedly connected to the outer wall of the hemispherical shell and is connected to the hemispherical transmission to drive the hemispherical shell to rotate.

2. A high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: A plurality of fixing rods are inserted into the sealing belt along the axial direction of the sealing sleeve and are centrally symmetrically distributed with the central axis of the sealing sleeve as the center.

3. A high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: The half tube body is provided with an air inlet hole and a threading hole.

4. A high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: A pair of hemispherical shells are arranged front and back, and a pair of hemispheres are arranged up and down, and the motor drives the pair of hemispheres to rotate around a horizontal axis; A sealing ring is fixedly and sealingly mounted on the outer spherical surface of the hemisphere at the upper end. The inner diameter of the sealing ring is larger than the inner diameter of the semi-tube body. The hemisphere rotates to drive the sealing ring to be coaxial with the semi-tube body.

5. The high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: The inner side surface of the half ring three is closely provided with a sealing half ring, and the inner side surface of the end of the half tube body away from the ball valve is also closely provided with a sealing half ring.

6. A high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: A drill pipe is coaxially and sealedly fixedly installed in a pair of half-tubes, one end of the drill pipe is coaxially and fixedly connected to a strong blowing nipple, one end of the strong blowing nipple away from the drill pipe is coaxially and fixedly connected to an air screw motor, and one end of the air screw motor away from the strong blowing nipple is coaxially and fixedly connected to a drill bit; The other end of the drill pipe is coaxially fixedly connected with a connecting rod, which movably penetrates the ball valve and is detachably sealed and fixedly connected to the inner wall of the half ring three at the other end of the half shell. A power head and an air blower are arranged at the end of the connecting rod away from the drill pipe.

7. A high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 6, characterized in that: The drill rod can movably penetrate the ball valve and is detachably sealed and fixedly connected to the inner wall of the half ring three at the other end of the half shell.

8. The high-pressure gas continuous circulation device for directional hole drilling in coal mines as claimed in claim 1, characterized in that: The half shell and the half ring are integrally arranged, and the half spherical shell and the half tube are integrally arranged.

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