Soft coal seam drilling device with supporting structure

Abstract

The utility model relates to the technical field of coal seam drilling, and discloses a soft coal seam drilling device with a supporting structure. The soft coal seam drilling device with the supporting structure comprises a bottom plate, a supporting piston is fixedly installed above the bottom plate, a ground nail is fixedly installed below the bottom plate, a supporting frame is fixedly installed above the bottom plate, a limiting pipe is fixedly installed in the supporting frame, a connecting frame is fixedly installed at the rear end of the limiting pipe, and the connecting frame is fixedly connected with the supporting piston. Due to the fact that the distance between the outer side face of the limiting ring and the axis of the driving shaft is increased at equal angles with the axis of the driving shaft as the reference, the distance between the outer wall of the limiting ring and the hole wall can be changed along with rotation of the limiting ring, meanwhile, the limiting ring and the residue guide ring are mutually embedded, and the relative pressure between residue soil and the hole wall can be changed along with drilling. In this way, certain pressure can be applied to the soil on the hole wall in the outward moving process of the muck, and therefore the effect of compacting the soil on the hole wall is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal seam drilling, in particular to a soft coal seam drilling device with a supporting structure. Background Art

[0002] Coal mine gas extraction is to drill into coal seams and gas concentration areas, connect the boreholes to special pipelines, and use extraction equipment to extract the gas in the coal seams and goafs to the ground for utilization; or discharge it into the total return air flow. Gas extraction is not only an important measure to reduce the amount of gas outburst during the mining process, prevent gas exceeding the limit and accumulation, and prevent gas explosions and coal and gas outburst accidents, but also can turn harm into benefit and be developed and utilized as a resource associated with coal.

[0003] The existing referenceable Chinese utility model patent has a publication number of CN218971183U, which discloses a soft coal seam extraction drilling device, and relates to a hole-making technology for directional drilling construction of soft coal seams in coal mines. A pilot drill bit is arranged inside the blade of the utility model, a first drill rod is arranged on the top of the pilot drill bit, a buffer is arranged on the top of the first drill rod, a first fixing ring is arranged on the top of the buffer, a first cylinder is arranged inside the first fixing ring, a second fixing ring is arranged on the top of the first cylinder, a second cylinder is arranged on the top of the second fixing ring, and a threaded cylinder is arranged on the surface of the second cylinder. The utility model arranges the outer surface of the drilling device, and the shape of the conical buffer of the base and the threaded cylinder on the surface of the cylinder makes the surrounding soil more compact during the drilling operation, thereby resulting in a high drilling rate, and can accurately control the drilling trajectory to avoid the problem of extraction blind areas and easy collapse of open holes.

[0004] Since the drilling device and the drill rod of the drilling rig are connected by bolts, the drilling device cannot enter the interior of the drilling rig, resulting in the rotating device possibly having the front and rear axes not in the same horizontal line due to the principle of gravity. This situation will cause the borehole to tilt downward. At the same time, the existing drilling device will set a threaded structure on the outside of the drilling device during the drilling process because it is necessary to discharge the debris. Since this method cannot apply pressure to the hole wall, the hole wall may collapse during the drilling process of soft coal seams. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a soft coal seam drilling device with a support structure, which has the advantages of being able to prevent the front end of the drilling device from sagging and being able to apply a certain pressure to the hole wall, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a soft coal seam drilling device with a support structure, comprising: a base plate, a supporting piston fixedly installed on the top of the base plate, a ground nail fixedly installed on the bottom of the base plate, a supporting frame fixedly installed on the top of the base plate, a limiting tube fixedly installed inside the supporting frame, a connecting frame fixedly installed on the rear end of the limiting tube, a fixing plate fixedly installed on the rear end of the connecting frame, a driving shaft movably installed inside the limiting tube, a supporting block fixedly installed inside the driving shaft, a slag guide ring and a limiting ring fixedly installed on the outside of the driving shaft, a connecting plate fixedly installed on the rear end of the driving shaft, a limiting block fixedly installed on the rear side of the connecting plate, a drill bit fixedly installed on the outside of the limiting block, and a drill tip fixedly installed on the rear end of the limiting block; the connecting frame can limit the position of the fixing plate.

[0009] As an optimal technical solution of the utility model, the base plate is symmetrically installed at the upper and lower ends of the support piston with the center of the support piston as a reference, and the support piston is symmetrically installed at the four corners of the top surface of the base plate with the center of the base plate as a reference. The base plates are movably connected through the support piston; the base plate can support the support piston.

[0010] As the preferred technical solution of the utility model, the ground nails are symmetrically installed at the four corners of the bottom surface of the bottom plate below the support piston with the center of the bottom plate as the reference, and the support frame is symmetrically installed at the front and rear sides of the top surface of the bottom plate above the support piston with the center of the bottom plate as the reference; the ground nails can increase the stability of the bottom plate.

[0011] As the preferred technical solution of the utility model, the limit tube is fixedly connected with the bottom plate above the support piston through the support frame, a cylindrical opening structure larger than the outer diameter of the slag guide ring is arranged at the center of the fixed plate, and the fixed plate is fixedly connected with the limit tube through the connecting frame; the fixed plate can limit the surface soil of the drilling working surface.

[0012] As an optimal technical solution of the utility model, the front end of the driving shaft is provided with an open hole structure connected to the drill rod, the slag guide ring is a spiral structure, the outer wall of the slag guide ring is in contact with the inner wall of the limiting tube, and a rotational connection is formed between the slag guide ring and the limiting tube; the driving shaft can drive the drill bit to rotate.

[0013] As a preferred technical solution of the utility model, the distance between the outer side surface of the limit ring and the axis of the drive shaft increases at equal angles based on the axis of the drive shaft, and the limit ring and the slag guide ring are interlocked; the limit ring can increase the relative pressure between the slag and the hole wall.

[0014] As a preferred technical solution of the utility model, the limit block is a conical structure, the limit block passes through the drill bit, and the limit block and the drill bit are fixedly connected through the limit block and the connecting plate; the drill bit and the drill tip can facilitate drilling.

[0015] Compared with the prior art, the utility model provides a soft coal seam drilling device with a support structure, which has the following beneficial effects:

[0016] 1. The utility model provides a limit ring, and the driving shaft can drive the slag guide ring and the limit ring to rotate during the rotation process. During the drilling process, the loose slag generated by the drilling will move forward under the guidance of the rotating limit ring. Since the distance between the outer side surface of the limit ring and the axis of the driving shaft increases at equal angles based on the axis of the driving shaft, the distance between the outer wall of the limit ring and the hole wall will change with the rotation of the limit ring. At the same time, the limit ring and the slag guide ring are interlocked, and the relative pressure between the slag and the hole wall will change with the drilling. This method can make the slag exert a certain pressure on the soil of the hole wall during the outward movement, thereby achieving the effect of compacting the soil of the hole wall.

[0017] 2. The utility model adopts the setting of the limiting tube. Since the outer wall of the slag guide ring contacts the inner wall of the limiting tube, and a rotational connection is formed between the slag guide ring and the limiting tube, and a fixed connection is formed between the slag guide ring and the driving shaft, the axis of the driving shaft will be limited by the limiting tube. Before the driving shaft enters the soil layer, the limiting tube can support the slag guide ring, thereby avoiding the situation where the horizontal heights of the front and rear ends of the driving shaft are inconsistent due to the influence of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure between the bottom plate and the limiting pipe of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the drive shaft of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the drill tip and the limit block of the utility model;

[0022] Among them: 1. bottom plate; 11. support piston; 12. ground nail; 13. support frame; 14. limit tube; 15. connecting frame; 16. fixed plate; 17. drive shaft; 18. support block; 19. slag guide ring; 110. limit ring; 111. connecting plate; 112. limit block; 113. drill bit; 114. drill tip. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 - Figure 4 In this embodiment, a soft coal seam drilling device with a support structure includes: a base plate 1, a support piston 11 is fixedly installed on the top of the base plate 1, a ground nail 12 is fixedly installed on the bottom of the base plate 1, a support frame 13 is fixedly installed on the top of the base plate 1, a limit tube 14 is fixedly installed inside the support frame 13, a connecting frame 15 is fixedly installed at the rear end of the limit tube 14, a fixed plate 16 is fixedly installed at the rear end of the connecting frame 15, a driving shaft 17 is movably installed inside the limit tube 14, a support block 18 is fixedly installed inside the driving shaft 17, a slag guide ring 19 and a limit ring 110 are fixedly installed on the outside of the driving shaft 17, a connecting plate 111 is fixedly installed on the rear end of the driving shaft 17, a limit block 112 is fixedly installed on the rear side of the connecting plate 111, a drill bit 113 is fixedly installed on the outside of the limit block 112, and a drill tip 114 is fixedly installed at the rear end of the limit block 112.

[0027] The bottom plate 1 is symmetrically installed at the upper and lower ends of the support piston 11 with the center of the support piston 11 as the reference. The support piston 11 is symmetrically installed at the four corners of the top surface of the bottom plate 1 with the center of the bottom plate 1 as the reference. The bottom plates 1 are movably connected through the support piston 11.

[0028] The ground nails 12 are symmetrically installed at the four corners of the bottom surface of the bottom plate 1 below the support piston 11 with the center of the bottom plate 1 as the reference, and the support frame 13 is symmetrically installed at the front and rear sides of the top surface of the bottom plate 1 above the support piston 11 with the center of the bottom plate 1 as the reference.

[0029] The limiting tube 14 is fixedly connected to the bottom plate 1 above the support piston 11 through the support frame 13. A cylindrical opening structure larger than the outer diameter of the slag guide ring 19 is provided at the center of the fixing plate 16. The fixing plate 16 is fixedly connected to the limiting tube 14 through the connecting frame 15.

[0030] The front end of the driving shaft 17 is provided with an open hole structure connected to the drill rod. The slag guide ring 19 is a spiral structure. The outer wall of the slag guide ring 19 contacts the inner wall of the limiting tube 14, and the slag guide ring 19 and the limiting tube 14 are rotationally connected.

[0031] The distance between the outer side surface of the limiting ring 110 and the axis of the driving shaft 17 increases at an equal angle based on the axis of the driving shaft 17 , and the limiting ring 110 and the slag guide ring 19 are interlocked.

[0032] The limiting block 112 is a conical structure. The limiting block 112 passes through the drill bit 113 . The limiting block 112 and the drill bit 113 are fixedly connected to the connecting plate 111 through the limiting block 112 .

[0033] Specifically, the base plate 1 can support the support piston 11, the support piston 11 can adjust the relative position between the base plates 1, the ground nails 12 can increase the stability of the base plate 1, the support frame 13 can support the limiting tube 14, the connecting frame 15 can limit the position of the fixing plate 16, the fixing plate 16 can limit the surface soil of the drilling working surface, the driving shaft 17 can drive the drill bit 113 to rotate, the supporting block 18 can increase the strength of the driving shaft 17, the slag guide ring 19 can facilitate the backward discharge of the slag generated by drilling, the limiting ring 110 can increase the relative pressure between the slag and the hole wall, the connecting plate 111 can connect the driving shaft 17 and the limiting block 112, the limiting block 112 can drive the drill bit 113 to rotate, and the drill bit 113 and the drill tip 114 can facilitate drilling.

[0034] When in use, it is necessary to make the rear end elevation of the fixing plate 16 contact with the vertical surface of the borehole, and then adjust the height of the limiting tube 14 by means of the supporting piston 11, so that the axis of the limiting tube 14 and the axis of the drill pipe are in the same straight line. Since the outer wall of the slag guide ring 19 contacts the inner wall of the limiting tube 14, and a rotational connection is formed between the slag guide ring 19 and the limiting tube 14, and a fixed connection is formed between the slag guide ring 19 and the driving shaft 17, the axis of the driving shaft 17 will be limited by the limiting tube 14. Before the driving shaft 17 enters the soil layer, the limiting tube 14 can support the slag guide ring 19, thereby avoiding the situation where the horizontal heights of the front and rear ends of the driving shaft 17 are inconsistent due to the influence of gravity. Afterwards, the driving shaft 17 is connected to the drill pipe of the drilling rig through the opening structure at the front end of the driving shaft 17. The machine can drive the driving shaft 17 to rotate, and the driving shaft 17 can drive the slag guide ring 19 and the limit ring 110 to rotate during the rotation. During the drilling process, the loose slag generated by the drilling will move forward under the guidance of the rotating limit ring 110. Since the distance between the outer side surface of the limit ring 110 and the axis of the driving shaft 17 increases at an equal angle based on the axis of the driving shaft 17, the distance between the outer wall of the limit ring 110 and the hole wall will change with the rotation of the limit ring 110. At the same time, the limit ring 110 and the slag guide ring 19 are interlocked with each other, and the relative pressure between the slag and the hole wall will change with the drilling. This method can make the slag exert a certain pressure on the soil of the hole wall during the outward movement, thereby achieving the effect of compacting the soil of the hole wall.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft coal seam drilling device with a support structure, characterized in that: include: A bottom plate (1), a support piston (11) is fixedly installed on the top of the bottom plate (1), a ground nail (12) is fixedly installed on the bottom of the bottom plate (1), a support frame (13) is fixedly installed on the top of the bottom plate (1), a limit tube (14) is fixedly installed inside the support frame (13), a connecting frame (15) is fixedly installed at the rear end of the limit tube (14), a fixing plate (16) is fixedly installed at the rear end of the connecting frame (15), and a driving mechanism (16) is movably installed inside the limit tube (14) A drive shaft (17) is provided, a support block (18) is fixedly installed inside the drive shaft (17), a slag guide ring (19) and a limit ring (110) are fixedly installed outside the drive shaft (17), a connecting plate (111) is fixedly installed at the rear end of the drive shaft (17), a limit block (112) is fixedly installed on the rear side of the connecting plate (111), a drill bit (113) is fixedly installed on the outer side of the limit block (112), and a drill tip (114) is fixedly installed at the rear end of the limit block (112).

2. A soft coal seam drilling device with a support structure according to claim 1, characterized in that: The bottom plate (1) is symmetrically mounted at the upper and lower ends of the support piston (11) with the center of the support piston (11) as a reference, and the support piston (11) is symmetrically mounted at the four corners of the top surface of the bottom plate (1) with the center of the bottom plate (1) as a reference. The bottom plates (1) are movably connected via the support piston (11).

3. The soft coal seam drilling device with a support structure according to claim 1, characterized in that: The ground nails (12) are symmetrically installed at the four corners of the bottom surface of the bottom plate (1) below the supporting piston (11) with the center of the bottom plate (1) as the reference, and the support frame (13) is symmetrically installed at the front and rear sides of the top surface of the bottom plate (1) above the supporting piston (11) with the center of the bottom plate (1) as the reference.

4. The soft coal seam drilling device with a support structure according to claim 1, characterized in that: The limiting tube (14) is fixedly connected to the bottom plate (1) above the supporting piston (11) via the supporting frame (13); a columnar opening structure larger than the outer diameter of the slag guide ring (19) is provided at the center of the fixing plate (16); and the fixing plate (16) is fixedly connected to the limiting tube (14) via the connecting frame (15).

5. The soft coal seam drilling device with a support structure according to claim 1, characterized in that: The front end of the driving shaft (17) is provided with an open hole structure connected to the drill rod, the slag guide ring (19) is a spiral structure, the outer wall of the slag guide ring (19) contacts the inner wall of the limit tube (14), and the slag guide ring (19) and the limit tube (14) are rotatably connected.

6. The soft coal seam drilling device with a support structure according to claim 1, characterized in that: The distance between the outer side surface of the limiting ring (110) and the axis of the driving shaft (17) increases at equal angles based on the axis of the driving shaft (17), and the limiting ring (110) and the slag guide ring (19) are interlocked.

7. The soft coal seam drilling device with a support structure according to claim 1, characterized in that: The limit block (112) is a conical structure, the limit block (112) passes through the drill bit (113), and the limit block (112) and the drill bit (113) are fixedly connected via the limit block (112) and the connecting plate (111).

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