Water stopping and distributing device for water prevention and control drilling construction

Abstract

The utility model discloses a water stop shunting device for water prevention drilling construction, which comprises a main pipe and a shunting pipe which is communicated with the main pipe and is perpendicular to the axial direction of the main pipe, the main pipe is connected with a hole packer through a flange plate, a check ring is fixedly connected inside the main pipe, and an extrusion pipe is arranged at an opening of one end of the main pipe away from the flange plate. An elastic sealing ring is installed between the check ring and the extrusion pipe, and the extrusion pipe slides in the axial direction of the main pipe to extrude the elastic sealing ring. A pressure-bearing flow guide plate matched with a drill rod in diameter is arranged at the end, away from the elastic sealing ring, of the check ring, the side, facing the elastic sealing ring, of the check ring is concaved inwards to form an annular groove, an extrusion ring is installed in the annular groove, and the extrusion ring is connected with the pressure-bearing flow guide plate through two connecting columns. The elastic sealing ring can actively adjust the gap between the elastic sealing ring and the drill rod according to the pressure of water, so that the situation that the water pressure of a drill hole is suddenly multiplied and is sprayed out of the gap between the elastic sealing ring and the drill rod to injure personnel can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment for water prevention and control drilling in coal mines, in particular to a water-stopping diversion device for water prevention and control drilling construction. Background Art

[0002] During the construction process of underground coal mine water exploration and drainage holes, we have always been faced with the problem of water flowing back from the construction water exploration and drainage holes. Once the water output of the borehole increases instantly, it will make it difficult for personnel to withdraw the drill rod, the visibility will be poor, and in serious cases, the drill rod may even be twisted into a twist shape, endangering the safety of the operators. Therefore, water-stopping measures during drilling are very important.

[0003] The effective water-stopping measure adopted in the prior art is to install a two-way diverter pipe on the hole sealer, and the water in the borehole flows out through the diverter pipe, thereby avoiding affecting the sight of the operator. However, when the water pressure in the borehole increases sharply, water will also spray out from the gap between the drill pipe and the main pipe. In order to prevent water from spraying out from the gap, the most common means is to install a sealing ring between the two. For example, the Chinese patent publication No. CN216477256U is named a blowout prevention diverter valve assembly for drilling. A built-in retaining ring is welded on the inner wall of the sleeve, and a support on the built-in retaining ring is provided. There are several built-in sealing rubber rings stacked, and the free end thread of the sleeve is matched with a plug. The plug is provided with a through hole for inserting the drill rod. The built-in sealing rubber ring can fit tightly with the drill rod under the squeezing of the plug. Although the sealing rubber ring can fill the gap, the drill rod also slides along its axial direction relative to the sealing rubber ring while rotating. Therefore, the sealing rubber ring will wear very quickly. Therefore, the patent sets a plug to squeeze the sealing rubber ring. Once water drips from the plug, it means that the sealing rubber ring has been worn. Further tightening the plug can make the sealing rubber ring fit tightly with the drill rod again.

[0004] However, the above-mentioned coordination between the sealing ring and the drill rod is only a passive adjustment, that is, the personnel can only judge that the sealing ring is seriously worn after finding water dripping. If the water pressure in the borehole increases sharply, the sealing ring will continue to wear due to the operation of the drill rod, and there will still be a safety hazard. That is, the sealing ring in the prior art cannot actively adjust the degree of its close coordination with the drill rod according to the pressure in the borehole. Utility Model Content

[0005] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides a water-stopping diversion device for water-control drilling construction.

[0006] To achieve the above-mentioned object, the utility model provides the following technical solution: a water-stopping diverter device for water-control drilling construction, comprising a main pipe and a diverter pipe arranged in communication perpendicular to the main pipe's axial direction, the main pipe being connected to a hole sealer via a flange, a retaining ring being fixedly connected to the interior of the main pipe, an extrusion pipe being provided at an opening at one end of the main pipe away from the flange, an elastic sealing ring being installed between the retaining ring and the extrusion pipe, and the extrusion pipe sliding along the axial direction of the main pipe to squeeze the elastic sealing ring;

[0007] A pressure-bearing guide plate that matches the diameter of the drill pipe is provided on the end of the retaining ring facing away from the elastic sealing ring. The side of the retaining ring facing the elastic sealing ring is recessed inward to form an annular groove. An extrusion ring is installed inside the annular groove. The extrusion ring and the pressure-bearing guide plate are connected by two connecting columns. The two connecting columns pass through the retaining ring and are slidably connected with it. The pressure of the water inside the borehole acts on the pressure-bearing guide plate, thereby causing the extrusion ring to squeeze the elastic sealing ring.

[0008] Preferably, the end of the main pipe facing the flange is regarded as the inner side and the end facing the extruded pipe is regarded as the outer side as the reference direction, and the plane where the pressure guide plate is located is located outside the plane where the diverter pipe is located.

[0009] Preferably, one end of the pressure guide plate facing the flange is an inclined surface, and the inclined surface is inclined toward the direction of the diversion pipe.

[0010] Preferably, the inner diameter of the retaining ring and the inner diameter of the top of the extruded tube are both smaller than the inner diameter of the elastic sealing ring;

[0011] Both ends of the extruded tube are integrally formed with ear plates, and the ends of the two ear plates are fixedly connected to screws. Mounting plates are fixed on the pipe wall of the main tube at the positions corresponding to the two screws. A nut is rotatably installed on each mounting plate. The screw extends toward the nut, penetrates the mounting plate, and is connected to the nut thread.

[0012] Preferably, a one-way valve is hingedly connected to the end of the shunt pipe, and the one-way valve opens when rotated in a direction away from the main pipe and closes when rotated in a direction toward the main pipe.

[0013] Preferably, the inner sleeve is designed to be separated from the main pipe, and one end of the inner sleeve is integrally connected to a plurality of arc-shaped pipes, and a limit block is formed at the edge of the end of each arc-shaped pipe, and a limit groove that matches the limit block is formed on the inner wall of the pressure guide plate. When the inner sleeve is inserted into the interior of the main pipe, the limit block is embedded in the limit groove so that the two form a one-way clamping structure;

[0014] The other end of the inner sleeve is a closed structure with an inner six-hole at its center. An external thread is formed on the outer wall of the end, and an internal thread matching the external thread is formed on the inner wall of the extrusion tube.

[0015] Preferably, the length of the screw is L1, the length of the extrusion tube is L2, and the length of the elastic sealing ring is L3, where L1 = L2 + L3.

[0016] Compared with the prior art, the present invention provides a water-stopping diversion device for water-control drilling construction, which has the following beneficial effects:

[0017] The utility model is provided with a pressure-bearing guide plate adapted to the diameter of the drill pipe at the end of the retaining ring away from the elastic sealing ring. The pressure of the water inside the borehole first acts on the pressure-bearing guide plate, and water stopping is completed in advance by the pressure-bearing guide plate, thereby preventing water with high pressure from directly acting on the elastic sealing ring, thereby making the pressure-bearing guide plate have a buffering effect. At the same time, when the water pressure acts on the pressure-bearing guide plate, it will also drive the extrusion ring to squeeze the elastic sealing ring, thereby making the elastic sealing ring and the drill pipe form a tight fit. The greater the water pressure, the greater the extrusion force on the elastic sealing ring, so that the elastic sealing ring can actively adjust the gap between it and the drill pipe according to the water pressure, thereby preventing water from being sprayed out from the gap between the elastic sealing ring and the drill pipe due to the sudden doubling of the drilling water pressure and causing harm to personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic structural diagram of the entire device in the embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the internal structure of the main tube in the embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the internal structure of the entire device after cutting in an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the connection between the pressure guide plate and the extrusion ring in an embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of the entire inner sleeve in an embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the inner sleeve, the pressure guide plate, and the extrusion tube in the embodiment of the present application for removing the elastic sealing ring.

[0025] In the figure: 1. Main pipe; 2. Diverter pipe; 3. Flange; 4. Mounting plate; 5. Check valve; 6. Pressure guide plate; 7. Retaining ring; 8. Elastic sealing ring; 9. Extrusion pipe; 10. Ear plate; 11. Screw; 12. Connecting column; 13. Nut; 14. Extrusion ring; 15. Inner sleeve; 16. External thread; 17. Internal six-hole; 18. Arc pipe; 19. Limit block; 20. Internal thread; 21. Limit groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0027] See also Figures 1-6 This embodiment proposes a water-stopping diversion device for water-prevention drilling construction, which is mainly suitable for situations where the water pressure in the borehole suddenly increases. It includes a main pipe 1 and a diversion pipe 2 arranged perpendicular to its axial direction. The main pipe 1 is connected to the hole sealer through a flange 3. A retaining ring 7 is fixedly connected to the inside of the main pipe 1. An extrusion pipe 9 is provided at the opening of the end of the main pipe 1 away from the flange 3. An elastic sealing ring 8 is installed between the retaining ring 7 and the extrusion pipe 9. The extrusion pipe 9 slides along the axial direction of the main pipe 1 to squeeze the elastic sealing ring 8. The elastic sealing ring 8 is squeezed by the extrusion pipe 9, thereby changing the elastic sealing The gap between the ring 8 and the drill rod makes the elastic sealing ring 8 and the drill rod fit tightly. As the drill rod continues to rotate, the friction between it and the elastic sealing ring 8 will cause the elastic sealing ring 8 to wear, and the drill rod continues to enter the borehole. There is also axial friction between the drill rod and the elastic sealing ring 8, so the wear of the elastic sealing ring 8 will be aggravated during the drilling process. In order to ensure the safety of the drilling operation, the elastic sealing ring 8 needs to be frequently inspected and replaced. Since the elastic sealing ring 8 can achieve a seal between the drill rod and the main pipe 1, the water in the borehole eventually flows out from 2.

[0028] Specifically, in this embodiment, ear plates 10 are integrally formed and connected at both ends of the extruded tube 9. The ends of the two ear plates 10 are fixedly connected with screws 11. A mounting plate 4 is fixed at the position corresponding to the two screws 11 on the wall of the main tube 1. A nut 13 is rotatably mounted on each mounting plate 4. The screw 11 extends toward the nut 13 and penetrates the mounting plate 4 and is threadedly connected to the nut 13. After the elastic sealing ring 8 is installed inside the main tube 1, the operator inserts the two screws 11 into the corresponding nuts 13, and first manually rotates the two screws 11. The nut 13 moves the extruded tube 9 toward the main tube 1. After the extruded tube 9 contacts the elastic sealing ring 8, the nut 13 can be rotated with a wrench to further squeeze the elastic sealing ring 8 of the extruded tube 9, so that the elastic sealing ring 8 fits tightly with the drill rod. The drill rod continuously rubs against the elastic sealing ring 8 during the drilling operation. Once water drips from the extruded tube 9, it means that the elastic sealing ring 8 has been worn to the point that water seeps out. At this time, the nut 13 is further rotated to make the elastic sealing ring 8 continue to fit tightly with the drill rod.

[0029] However, in the above scheme, the determination of the gap between the elastic sealing ring 8 and the drill rod always has a hysteresis, that is, only when water seeps out of the squeeze tube 9 can it be known that the elastic sealing ring 8 has been worn. If the water pressure in the borehole suddenly increases sharply at this time, water will be ejected from the gap. Even if the operator quickly turns the nut 13 at this time, the operator's clothes will still be wet and the operator's vision will be affected. In order to enable the deformation of the elastic sealing ring 8 to change with the change of water pressure, so that the elastic sealing ring 8 can quickly achieve a tight fit with the drill rod, this embodiment is provided with a pressure guide plate 6 adapted to the diameter of the drill rod at the end of the retaining ring 7 away from the elastic sealing ring 8. The side of the retaining ring 7 facing the elastic sealing ring 8 is inwardly recessed to form an annular groove. An extrusion ring 14 is installed inside the annular groove. The extrusion ring 14 is connected to the pressure guide plate 6 by two connecting columns 12. The two connecting columns 12 are set through the retaining ring 7 and are slidably connected thereto. The pressure of the water inside the borehole first acts on the pressure guide plate 6, and then The pressure guide plate 6 is pre-sealed to prevent high-pressure water from directly acting on the elastic sealing ring 8, thereby giving the pressure guide plate 6 a buffering effect. Moreover, since the pressure guide plate 6 and the extrusion ring 14 in this embodiment are connected, when the water pressure acts on the pressure guide plate 6, it will also drive the extrusion ring 14 to squeeze the elastic sealing ring 8, thereby forming a tight fit between the elastic sealing ring 8 and the drill rod. The greater the water pressure, the greater the squeezing force on the elastic sealing ring 8, thereby preventing the sudden doubling of drilling water pressure from spraying out from the gap between the elastic sealing ring 8 and the drill rod to cause harm to personnel.

[0030] Since a pressure-bearing guide plate 6 is provided inside the main pipe 1 in this embodiment, the position of the pressure-bearing guide plate 6 inside the main pipe 1 also needs to be limited. According to the actual situation when the entire device is installed, the end of the main pipe 1 facing the flange 3 is the inside (the flange 3 is connected to the sealer fixed in the drilled hole), and the end facing the extrusion tube 9 is the outside as the reference direction. The plane where the pressure-bearing guide plate 6 is located is located outside the plane where the diversion pipe 2 is located. In this way, the water in the drilled hole can flow smoothly into the diversion pipe 2 after acting on the pressure-bearing guide plate 6.

[0031] Of course, as a preferred embodiment, the end of the pressure guide plate 6 facing the flange 3 can also be an inclined surface, and the inclined surface is inclined in the direction of the diversion pipe 2. The inclined surface can be used to guide the water, so that the water can flow into the diversion pipe 2 quickly, and the end of the diversion pipe 2 is hinged with a one-way valve 5. The one-way valve 5 is opened when it is rotated away from the main pipe 1 and closed when it is rotated toward the main pipe 1. In the initial state, the one-way valve 5 is in a closed state, which can prevent external impurities from entering the interior of 2.

[0032] It should be pointed out in particular that whether water can be ejected from the extrusion tube 9 mainly depends on the gap between the elastic sealing ring 8 and the drill rod. Therefore, the inner diameter of the retaining ring 7 and the inner diameter of the top of the extrusion tube 9 need to be set smaller than the inner diameter of the elastic sealing ring 8. This can ensure that the elastic sealing ring 8 is in contact with the drill rod, while the retaining ring 7 and the extrusion tube 9 are not in contact with the drill rod.

[0033] As the sealing elastic ring 8 is gradually worn, the extrusion tube 9 or the pressure guide plate 6 will act on the elastic sealing ring 8, causing it to extend radially and thus form a tight fit with the drill pipe again. However, the outer side of the elastic sealing ring 8 is also squeezed to the inner wall of the main pipe 1. Over time, the elastic sealing ring 8 will stick to the inner wall of the main pipe 1. When the elastic sealing ring 8 needs to be replaced, it is difficult to disassemble it. Based on this, the water-stopping diversion device proposed in this embodiment also includes an inner sleeve 15 designed to be split from the main pipe 1. One end of the inner sleeve 15 is integrally formed with several arc-shaped tubes 18, and a limiting block 19 is formed at the edge of the end of each arc-shaped tube 18. A limiting groove 21 that cooperates with the limiting block 19 is formed on the inner wall of the pressure guide plate 6. Figure 6As shown, when the elastic sealing ring 8 needs to be replaced, the inner sleeve 15 is inserted into the main pipe 1. When the arc tube 18 just contacts the extruded tube 9, under the action of the four limit blocks 19, the four arc tubes 18 are deformed inwardly relative to the inner sleeve 15. The other end of the inner sleeve 15 is a closed structure with an inner six-hole 17 at the center. An external thread 16 is formed on the outer wall of the end, and an internal thread 20 adapted thereto is formed on the inner wall of the extruded tube 9. When the inner sleeve 15 is inserted into the main pipe 1 until the external thread 16 contacts the internal thread 20 inside the extruded tube 9, When the pressure guide plate 6 is touched, the operator uses an inner hexagonal tool to insert it into the inner six holes 17 to rotate the inner sleeve 15, so that the inner sleeve 15 continues to move toward the inside of the main pipe 1 until the four limit blocks 19 move to the position of the limit groove 21 on the inner side of the pressure guide plate 6. At this time, the four arc tubes 18 restore their deformation, and the limit blocks 19 just enter the limit groove 21. When the operator hears a "click", it means that the limit block 19 enters the limit groove 21. At this time, the rotation of the inner sleeve 15 is stopped, and the limit block 19 is embedded in the limit groove 21 to form a one-way clamping structure between the two.

[0034] When the limit block 19 and the limit groove 21 are stuck, the personnel use a wrench to rotate the two nuts 13 in the opposite direction. The cooperation of the nut 13 and the screw 11 can make the extruded tube 9 detach from the main tube 1, and since the inner sleeve 15 is connected to the extruded tube 9 by a threaded connection, it will drive the pressure guide plate 6 to move toward the elastic sealing ring 8, thereby forming a thrust on the elastic sealing ring 8, so that the elastic sealing ring 8 is detached from the main tube 1. In order to enable the pressure guide plate 6 to continuously apply force to the elastic sealing ring 8 until it is detached from the main tube 1, in this embodiment, the length of the screw 11 is set to L1, the length of the extruded tube 9 is set to L2, and the length of the elastic sealing ring 8 is set to L3, L1=L2+L3.

[0035] When replacing the elastic sealing ring 8, first remove the entire device from the hole sealer, and then drive the elastic sealing ring 8 to gradually disengage from the main pipe 1. When the elastic sealing ring 8 extends to the outside of the main pipe 1, the screw 11 and the nut 13 are disengaged at this time. First, rotate the extruded tube 9 in the opposite direction relative to the inner sleeve 15 to remove it, and then remove the old elastic sealing ring 8. Then, apply force to the inner sleeve 15 toward the inside of the main pipe 1, and the limit block 19 will move out of the limit groove 21. Finally, the entire inner sleeve 15 can be taken out from one side of the flange 3. Finally, put the new elastic sealing ring 8 into the main pipe 1, and install the extruded tube 9 on the main pipe 1 again, so that the extruded tube 9 moves toward the inside of the main pipe 1 to squeeze and fix the new elastic sealing ring 8 and the retaining ring 7.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water-stopping diversion device for water-control drilling construction, comprising a main pipe (1) and a diversion pipe (2) arranged to be connected perpendicular to the main pipe (1) and connected to the hole sealer via a flange (3), characterized in that: A retaining ring (7) is fixedly connected to the interior of the main pipe (1); an extrusion pipe (9) is provided at the opening of one end of the main pipe (1) away from the flange (3); an elastic sealing ring (8) is installed between the retaining ring (7) and the extrusion pipe (9); the extrusion pipe (9) slides along the axial direction of the main pipe (1) to extrude the elastic sealing ring (8); A pressure guide plate (6) having a diameter matching that of the drill pipe is provided at one end of the retaining ring (7) facing away from the elastic sealing ring (8). A ring groove is formed inwardly on the side of the retaining ring (7) facing the elastic sealing ring (8). An extrusion ring (14) is provided inside the ring groove. The extrusion ring (14) is connected to the pressure guide plate (6) via two connecting columns (12). The two connecting columns (12) penetrate the retaining ring (7) and are slidably connected thereto. The pressure of the water inside the borehole acts on the pressure guide plate (6), thereby causing the extrusion ring (14) to squeeze the elastic sealing ring (8).

2. The water-stopping diversion device for water control drilling construction according to claim 1 is characterized in that: The end of the main pipe (1) facing the flange (3) is regarded as the inner side, and the end facing the extrusion pipe (9) is regarded as the outer side as the reference direction. The plane where the pressure guide plate (6) is located is located outside the plane where the diverter pipe (2) is located.

3. The water-stopping diversion device for water control drilling construction according to claim 2, characterized in that: One end of the pressure guide plate (6) facing the flange (3) is an inclined surface, and the inclined surface is arranged to be inclined in the direction of the diversion pipe (2).

4. The water-stopping diversion device for water control drilling construction according to claim 1, characterized in that: The inner diameter of the retaining ring (7) and the inner diameter of the top of the extrusion tube (9) are both smaller than the inner diameter of the elastic sealing ring (8); Both ends of the extruded tube (9) are integrally formed with ear plates (10), and the ends of the two ear plates (10) are fixedly connected with screw rods (11). A mounting plate (4) is fixed at the position corresponding to the two screw rods (11) on the tube wall of the main tube (1), and a nut (13) is rotatably mounted on each mounting plate (4). The screw rod (11) extends toward the nut (13), penetrates the mounting plate (4), and is threadably connected to the nut (13).

5. The water-stopping diversion device for water control drilling construction according to any one of claims 1 to 4, characterized in that: A one-way valve (5) is hingedly connected to the end of the shunt pipe (2). The one-way valve (5) opens when it is rotated away from the main pipe (1) and closes when it is rotated toward the main pipe (1).

6. The water-stopping diversion device for water control drilling construction according to claim 4, characterized in that: The invention also includes an inner sleeve (15) designed to be separated from the main pipe (1), one end of the inner sleeve (15) is integrally connected with a plurality of arc-shaped pipes (18), a limiting block (19) is formed at the edge of the end of each arc-shaped pipe (18), and a limiting groove (21) is formed on the inner wall of the pressure guide plate (6) to match the limiting block (19), and when the inner sleeve (15) is inserted into the interior of the main pipe (1), the limiting block (19) is embedded in the limiting groove (21) so that the two form a one-way clamping structure; The other end of the inner sleeve (15) is a closed structure with an inner six-hole (17) at its center. An outer thread (16) is formed on the outer wall of the end, and an inner thread (20) adapted thereto is formed on the inner wall of the extrusion tube (9).

7. The water-stopping diversion device for water control drilling construction according to claim 6, characterized in that: The length of the screw (11) is L1, the length of the extrusion tube (9) is L2, and the length of the elastic sealing ring (8) is L3, where L1 = L2 + L3.

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