Downward drilling reverse circulation water blowing device for gas control

Abstract

The utility model discloses a gas control down drilling reverse circulation water blowing device which comprises a hole sealing pipe and further comprises a drainage assembly, the drainage assembly comprises a gas inlet pipe arranged on the outer side of the hole sealing pipe, a water blowing pipe is arranged in the hole sealing pipe, a water outlet pipe is arranged on the outer side of the hole sealing pipe, and a connecting part is arranged at the end, away from the water blowing pipe, of the hole sealing pipe; the fixing assembly comprises a fixing ring arranged on the outer side of the hole sealing pipe, multiple sets of positioning rods are symmetrically connected to the outer side of the fixing ring in a penetrating and inserting mode, and pushing parts are symmetrically arranged at the top of the fixing ring; the fixing assembly is arranged on the outer side of the hole sealing pipe, the pushing parts symmetrically arranged at the top of the fixing ring in the fixing assembly are used for driving the positioning rod to move, and therefore the positioning rod protrudes out of the surface of the fixing ring and extrudes the hole wall of a drill hole, the hole sealing pipe and the hole wall of the drill hole are positioned and fixed, and shaking of the hole sealing pipe is avoided; and sealing treatment and later drainage operation at the joint of the hole sealing pipe and the drill hole are affected.

Description

Technical Field

[0001] The utility model relates to the field of coal mine construction equipment, in particular to a reverse circulation water blowing device for downward drilling in gas control. Background Technique

[0002] During coal mine construction, water accumulation in the borehole is likely to occur due to the construction process. At the same time, after some boreholes encounter rock, they are connected with the rock mass fissures, resulting in water inrush sources in the boreholes. The accumulated water in the downward boreholes cannot drain out by gravity on its own. When the static pressure of the accumulated water in the borehole is greater than the gas pressure of the coal seam, the accumulated water will form an isolation layer between the coal seam and the gas drainage system, affecting gas drainage.

[0003] Regarding the reverse circulation water blowing device for downward drilling in gas control with the application number 201921920799.0, by improving the water blowing device, changing its water blowing method from positive circulation to reverse circulation, the water blowing effect is significantly improved. Using the straw principle, the problems of less water blowing and poor effect of the original water blowing device are solved.

[0004] However, when installing the above device, since there is no positioning and fixing component on the outer side of the sealing pipe, after the installer holds the sealing pipe and inserts it into the borehole, and then fills and seals the gap between the sealing pipe and the borehole wall. During the sealing process, due to the reason of holding the sealing pipe, the sealing pipe will be squeezed and offset relative to the central axis of the borehole. The sealing pipe at the offset position will change the insertion position of the sealing pipe and the water surface inside the borehole, affecting the subsequent drainage operation. Therefore, in order to solve the shaking problem during the sealing process of the sealing pipe, a reverse circulation water blowing device for downward drilling in gas control is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a reverse circulation water blowing device for downward drilling in gas control to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A reverse circulation water blowing device for downward drilling in gas control, including a sealing pipe, and further including:

[0007] A drainage component, the drainage component includes an air inlet pipe arranged on the outer side of the sealing pipe, a water blowing pipe is arranged inside the sealing pipe, a water outlet pipe for connecting the water blowing pipe is arranged on the outer side of the sealing pipe, and a connecting part is arranged at one end of the sealing pipe far away from the water blowing pipe;

[0008] A fixing component, the fixing component is used for positioning and fixing the sealing pipe and the inner wall of the sealing section of the borehole. The fixing component includes a fixing ring arranged on the outer side of the sealing pipe, a plurality of groups of positioning rods are symmetrically inserted and connected on the outer side of the fixing ring, and a pushing part for pushing the positioning rods to move is symmetrically arranged at the top of the fixing ring.

[0009] Preferably, the pushing part includes a worm gear inserted and connected to the top of the fixed ring. A worm wheel is meshed on the side of the worm gear. A connecting ring is sleeved in the middle of the worm wheel. A bidirectional threaded rod is sleeved in the middle of the connecting ring. Both ends of the bidirectional threaded rod are threadedly inserted and connected to the ends of the positioning rods.

[0010] Preferably, threaded holes are provided at the ends of the positioning rods for the threaded insertion of the bidirectional threaded rod.

[0011] Preferably, a rotating groove is provided at the insertion part of the worm gear and the fixed ring, and the worm wheel is arranged inside the rotating groove.

[0012] Preferably, movable grooves are provided on the side of the fixed ring for the movement of the positioning rods.

[0013] Preferably, an internal hexagonal ring block is provided at the top of the worm wheel for the rotation of the worm gear.

[0014] Preferably, the connecting part includes a flange plate arranged at the end of the hole-sealing pipe.

[0015] The technical effects and advantages of the present utility model:

[0016] The present utility model is provided with a fixing assembly on the outer side of the hole-sealing pipe. By using the pushing parts symmetrically arranged on the top of the fixed ring in the fixing assembly to drive the positioning rods to move, the positioning rods protrude from the surface of the fixed ring and squeeze against the hole wall of the drilling hole, thereby positioning and fixing the hole-sealing pipe and the hole wall of the drilling hole, avoiding the shaking of the hole-sealing pipe and affecting the sealing treatment at the connection between the hole-sealing pipe and the drilling hole and the subsequent drainage operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole of the present utility model.

[0018] Figure 2 is a first schematic sectional view of the whole of the present utility model.

[0019] Figure 3 is a sectional view of the fixing assembly of the present utility model.

[0020] Figure 4 is a second schematic sectional view of the whole of the present utility model.

[0021] In the figure: 1. Hole-sealing pipe; 101. Water outlet pipe; 102. Air inlet pipe; 103. Flange plate; 2. Water blowing pipe; 3. Fixed ring; 301. Rotating groove; 302. Movable groove; 4. Positioning rod; 401. Threaded hole; 5. Pushing part; 501. Worm gear; 5011. Internal hexagonal ring block; 502. Worm wheel; 503. Connecting ring; 504. Bidirectional threaded rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention provides a downhole drilling reverse circulation water blowing device for gas control as shown in Figures 1-4 which includes a sealing pipe 1, and also includes a drainage assembly and a fixing assembly;

[0024] It should be noted that a connecting portion is provided at one end of the sealing pipe 1 away from the water blowing pipe 2. The connecting portion includes a flange 103. The flange 103 is arranged at the end of the sealing pipe 1, and the flange 103 can be connected to a valve to keep the sealing pipe 1 in a closed state;

[0025] Specifically, the drainage assembly includes an air inlet pipe 102 arranged outside the sealing pipe 1. A water blowing pipe 2 is arranged inside the sealing pipe 1, and a water outlet pipe 101 for connecting the water blowing pipe 2 is arranged outside the sealing pipe 1;

[0026] It should be noted that both the air inlet pipe 102 and the water outlet pipe 101 are provided with tapered openings to facilitate the subsequent binding and fixing of the pipes. The air inlet pipe 102 is used to introduce air, and the water in the drilling hole is forced to flow out along the water blowing pipe 2 through the pressure difference;

[0027] Specifically, the fixing assembly includes a fixing ring 3 arranged outside the sealing pipe 1, and a plurality of positioning rods 4 are symmetrically inserted and connected to the outside of the fixing ring 3;

[0028] It should be noted that the fixing assembly is used to position and fix the sealing pipe 1 and the inner wall of the drilling hole sealing section. A break groove is opened on the outside of the sealing pipe 1. The fixing ring 3 is welded and fixed to the sealing pipe 1 and the water blowing pipe 2 by using the break groove. An activity groove 302 is opened on the side of the fixing ring 3 for the movement of the positioning rod 4;

[0029] A pushing portion 5 for pushing the positioning rod 4 to move is symmetrically arranged on the top of the fixing ring 3;

[0030] Specifically, the pushing portion 5 includes a worm 501 inserted and connected to the top of the fixing ring 3. A worm gear 502 is meshed on the side of the worm 501. A connecting ring 503 is sleeved in the middle of the worm gear 502. A bidirectional threaded rod 504 is sleeved in the middle of the connecting ring 503. Both ends of the bidirectional threaded rod 504 are threadedly inserted and connected to the ends of the positioning rod 4;

[0031] It should be noted that a thread is provided at the connection between the worm 501 and the worm wheel 502, and the rest of the parts are smooth surfaces. An internal hexagonal ring block 5011 is provided at the top of the worm wheel 502, and the internal hexagonal ring block 5011 is used for the rotation of the worm 501. A rotation groove 301 is provided at the intersection of the worm 501 and the fixed ring 3. The worm wheel 502 is arranged inside the rotation groove 301. The worm 501 penetrates the inner wall of the rotation groove 301. From Figure 3 it can be seen that a bearing is provided at the intersection of the worm 501 and the inner wall of the rotation groove 301 on the side away from the internal hexagonal ring block 5011. The middle of the bearing is welded and fixed to the outer side of the worm 501, and the outer side of the bearing is welded and fixed to the inner wall of the rotation groove 301, thereby limiting the position of the worm 501. The connection between the worm wheel 502 and the connection ring 503 is welded and fixed. The connection ring 503 is welded and fixed to the bidirectional threaded rod 504. An annular protrusion is provided on the inner wall of the moving groove 302, and the annular protrusion is inserted and connected to the outer side of the bidirectional threaded rod 504, thereby limiting the position of the bidirectional threaded rod 504;

[0032] A threaded hole 401 is provided at the end of the positioning rod 4, and the threaded hole 401 is used for the threaded insertion of the bidirectional threaded rod 504;

[0033] It should be noted that the cross-section of the positioning rod 4 is rectangular to prevent it from rotating synchronously with the bidirectional threaded rod 504;

[0034] During actual use, the positioning rod 4 is driven to move by the pushing parts 5 symmetrically arranged at the top of the fixed ring 3 in the fixing assembly. The rotating worm 501 drives the worm wheel 502 to rotate, so that the rotating bidirectional threaded rod 504 drives the positioning rod 4 to move, so that the positioning rod 4 protrudes from the surface of the fixed ring 3 and presses against the drilling hole wall, thereby positioning and fixing the sealing pipe 1 and the drilling hole wall, and preventing the sealing pipe 1 from shaking, which affects the sealing treatment at the connection between the sealing pipe 1 and the drilling hole and the subsequent drainage operation.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reverse circulation water blowing device for downward drilling in gas control, including a hole sealing pipe (1), characterized in that, It further includes: A drainage component, the drainage component includes an air inlet pipe (102) arranged outside the plugging pipe (1), a water blowing pipe (2) is arranged inside the plugging pipe (1), a water outlet pipe (101) for connecting the water blowing pipe (2) is arranged outside the plugging pipe (1), and a connecting part is arranged at one end of the plugging pipe (1) away from the water blowing pipe (2); A fixing component, the fixing component is used for positioning and fixing the plugging pipe (1) and the inner wall of the drilled hole sealing section, the fixing component includes a fixing ring (3) arranged outside the plugging pipe (1), a plurality of groups of positioning rods (4) are symmetrically inserted and connected outside the fixing ring (3), and a pushing part (5) for pushing the positioning rods (4) to move is symmetrically arranged at the top of the fixing ring (3).

2. The downhole reverse circulation water blowing device for gas control according to claim 1, characterized in that, The pushing part (5) includes a worm (501) inserted and connected to the top of the fixing ring (3), a worm gear (502) is meshed on the side of the worm (501), a connecting ring (503) is sleeved in the middle of the worm gear (502), a bidirectional threaded rod (504) is sleeved in the middle of the connecting ring (503), and both ends of the bidirectional threaded rod (504) are threadedly inserted and connected to the ends of the positioning rods (4).

3. The downhole reverse circulation water blowing device for gas control according to claim 2, characterized in that A threaded hole (401) is opened at the end of the positioning rod (4), and the threaded hole (401) is used for the threaded insertion of the bidirectional threaded rod (504).

4. A downhole reverse circulation water blowing device for gas control according to claim 2, characterized in that, A rotating groove (301) is opened at the insertion part of the worm (501) and the fixing ring (3), and the worm gear (502) is arranged inside the rotating groove (301).

5. The downhole reverse circulation water blowing device for gas control according to claim 2, characterized in that, An activity groove (302) is opened at the side of the fixing ring (3), and the activity groove (302) is used for the movement of the positioning rod (4).

6. The downhole reverse circulation water blowing device for gas control according to claim 2, wherein, An internal hexagonal ring block (5011) is arranged at the top end of the worm gear (502), and the internal hexagonal ring block (5011) is used for the rotation of the worm (501).

7. A reverse circulation water blowing device for downward drilling in gas control according to claim 1, characterized in that, The connecting part includes a flange plate (103), and the flange plate (103) is arranged at the end of the plugging pipe (1).

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