Hydraulic broaching device for permeability improvement of mechanical caving coal seam

Abstract

The invention relates to the technical field of hole expanding devices, in particular to a hydraulic hole expanding device for mechanical hole forming coal seam anti-reflection, which comprises a drill rod main body, a control adjusting assembly and a restraining assembly, one side of the drill rod main body is provided with an assembling base, one side of the assembling base is provided with a hole forming assembly, and the hole forming assembly comprises a hole expanding cutter box, a water spraying drill bit and two cutter wings. When the chambering cutter box and the drill rod body are used in cooperation, the water spraying drill bit and the drill rod body are combined and pulled oppositely, the chambering cutter box is synchronously fixed and combined, replacement and maintenance of the water spraying drill bit and the chambering cutter box in the later period are improved, cost is reduced, and then the cutter wings are adjusted and installed through the control adjusting assembly. The hydraulic control core rod is not communicated with the position of the cutter wing, pollutants in a coal seam do not affect normal hydraulic movement and water supply operation of the hydraulic control core rod in the construction process, and the constraint assembly is matched, so that the cutter wing is convenient to disassemble and replace, and the installation stability between the assembly base and the reaming cutter box is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of hole expanding devices, in particular to a hydraulic hole expanding device for mechanical hole making and permeability enhancement of coal seams. Background Art

[0002] The hole-making process is widely used in coal mine production systems. It is mainly divided into hydraulic punching hole-making and in-hole high-pressure mechanical hole-making. At present, the common technology for preventing rock burst and gas disasters is to use high-pressure hydraulic power to cut the coal seam to increase permeability;

[0003] In the prior art, the utility model patent with authorization announcement number CN212508087U provides a push rod jacking reamer, which adopts a mechanical jacking control structure for application. The reamer can be opened by pushing it open only through the transmitted mechanical thrust to expand the hole and create a hole, avoiding the risks caused by the use of high pressure. It can control the hinged blade to unfold from the blade chamber through the mechanical pushing core rod and the hinged plate to realize the expansion of different coal seams. However, when this design is used, since the coal seam to be permeable is relatively soft and high-pressure water is fed into the drill bit, the coal slag and soil produced by drilling can easily enter the active position of the core rod through the blade connection position, thereby affecting the service life and possibly causing the leakage of the high-pressure water delivered from the center, resulting in insufficient water pressure and other phenomena. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic hole-expanding device for mechanically creating coal seams to increase permeability, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a hydraulic hole expansion device for mechanical hole-making coal seam permeability enhancement, comprising:

[0006] A drill rod body, one side of which is provided with an assembly base, one side of which is provided with a hole-forming component, the hole-forming component comprising a hole-expanding knife box, a water jet drill bit and two blade wings, one side of the water jet drill bit penetrates the hole-expanding knife box and is fixedly connected to the assembly base, and the two blade wings are movably plugged into the two sides of the hole-expanding knife box respectively;

[0007] A control and adjustment component, the control and adjustment component includes a hydraulic control core rod, two adjustment plates and four control gear sleeves, the hydraulic control core rod is movably plugged into the drill rod body, the two adjustment plates are respectively arranged on both sides of the reaming knife box, and the knife wings are connected to the adjustment plates;

[0008] A constraint component is inserted into the four sides of the assembly base and the reaming knife box, and the constraint component includes four constraint stabilizing rods.

[0009] Preferably, one side of the reaming tool box is in contact with the assembly base, and an extended assembly sleeve is provided on the side of the reaming tool box away from the assembly base, a prismatic groove is provided on one side of the extended assembly sleeve, and a prismatic docking rod is horizontally provided on one side of the water jet drill bit, and the prismatic docking rod is inserted into the prismatic groove of the extended assembly sleeve.

[0010] Preferably, an assembling screw is horizontally provided at the center of one side of the prismatic docking rod, the assembling screw movably passes through the center of the reaming knife box and is provided with an external thread, and the diameter of the assembling screw is smaller than the diameter of the prismatic docking rod.

[0011] Preferably, a push groove is provided in the assembly base, one side of the hydraulic control core rod passes through the center of the drill rod body and is inserted into the push groove and is provided with a sealing insert, a combined thread groove is provided through the center of one side of the assembly base located at the push groove, the assembly base is sleeved with the external thread of the assembly screw through the combined thread groove, the hydraulic control core rod is horizontally connected to the center of one side of the push groove and is provided with a sealing insert, and the sealing insert is connected to the assembly screw through a plurality of sealing rings.

[0012] Preferably, the upper and lower sides of the reaming knife box are respectively provided with storage grooves, the two blade wings are respectively placed in the two storage grooves, a synchronization key hole is provided on one side of the blade wing, and self-rotation tooth grooves are provided on both sides of the synchronization key holes close to the two blade wings in the reaming knife box, and four control gear sleeves are respectively rotatably inserted into the four self-rotation tooth grooves, and a removal and replacement groove is provided on one side of the reaming knife box located at the self-rotation tooth groove and away from the storage groove, and both sides of the control gear sleeve are respectively inserted into the receiving groove and the removal and replacement groove through the sealing shaft on both sides of the self-rotation tooth groove.

[0013] Preferably, a spline groove is provided through the center of the control gear sleeve, and the spline groove of the control gear sleeve is arranged corresponding to the synchronous key hole of the blade wing. The centers of the two control gear sleeves on one side of the reaming tool box are horizontally penetrated by a spline shaft, and the blade wing is connected to the spline shaft through the synchronous key hole.

[0014] Preferably, a control cavity is vertically connected between two adjacent rotating tooth grooves in the reaming knife box, and two adjustment plates are movably inserted into the two control cavities respectively. Two guide rods are horizontally provided on the side of the control cavity away from the assembly base. The adjustment plate is provided with a guide plate on one side of the two guide rods, and the guide plate is movably sleeved on the two guide rods, and a reset spring is sleeved on one side of the guide rods.

[0015] Preferably, a plurality of toggle teeth are symmetrically provided on one side of the adjustment plate close to the control gear sleeve, and one side of the two control gear sleeves are respectively inserted into the control inner cavity and meshed with the toggle teeth of the adjustment plate.

[0016] Preferably, the assembly base is provided with docking grooves on both sides close to the control inner cavity and connected to the push groove, one side of the two adjustment plates respectively moves through the control inner cavity and the docking groove and is inserted into the push groove, and contact plates are provided on both sides of the hydraulic control core rod located in the push groove, and the side of the adjustment plate inserted into the push groove is in contact with the contact plate.

[0017] Preferably, one side of the disassembly groove and the four sides of the assembly base are horizontally provided with rod grooves, one side of the four constraint stabilizing rods respectively movably penetrates the four rod grooves of the assembly base and is inserted into the rod groove of the reaming tool box, one side of the rod groove located in the disassembly groove is respectively abutted against the side of the spline shaft located in the disassembly groove, and a constraint bolt is provided on one side of the rod groove where the reaming tool box is inserted into the rod groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the reaming cutter box is used in conjunction with the drill rod body, the reaming cutter box is synchronously fixed and combined through the combined pulling between the water jet drill bit and the drill rod body, thereby improving the later replacement and maintenance of the water jet drill bit and the reaming cutter box and reducing costs. The blade is then adjusted and installed through the control adjustment component so that the hydraulic core rod is not connected to the blade position. During the construction process, pollutants in the coal seam will not affect the normal hydraulic activity and water delivery operation of the hydraulic core rod. In addition, the constraint component is used to facilitate the removal and replacement of the blade and strengthen the installation stability between the assembly base and the reaming cutter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the local episiotomy structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of part A;

[0023] Figure 4 This is a schematic diagram of the connection structure of the adjustment plate of the present invention;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of part B;

[0025] Figure 6 This is an exploded view of the blade wing of the present invention in the state of hole expansion;

[0026] Figure 7 It is an exploded diagram of the structure connection of the present invention;

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of the C site.

[0028] In the figure: drill rod body 1, assembly base 2, reaming knife box 3, extension assembly sleeve 4, water jet drill bit 5, prismatic docking rod 6, assembly screw 7, hydraulic core rod 8, push groove 9, sealing insert 11, storage groove 12, knife wing 13, synchronization key hole 14, self-rotation tooth groove 15, control tooth sleeve 16, spline shaft 17, control inner cavity 18, guide plate 19, guide rod 20, return spring 21, adjustment plate 22, docking groove 23, contact plate 24, rod groove 25, constraint stabilizing rod 26, replacement groove 28. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-Figure 8 , this application provides the following technical solutions.

[0031] The jacking tool 3 of the embodiment of the present invention is provided with a plurality of jacking tools 1, a plurality of jacking tools 1 are provided on the jacking tool box 3, and a plurality of jacking tools 1 are provided on the jacking tool box 3. The jacking tool box 3 is provided with a plurality of jacking tools 1 and a plurality of jacking tools 1 are provided on the jacking tool box 3. The jacking tool box 3 is provided with a plurality of jacking tools 1 and a plurality of jacking tools 1 are provided on the jacking tool box 3.

[0032] An assembly screw 7 is horizontally arranged at the center of one side of the prismatic docking rod 6. The assembly screw 7 movably penetrates the center of the reaming knife box 3 and is provided with an external thread, and the diameter of the assembly screw 7 is smaller than the diameter of the prismatic docking rod 6. A push groove 9 is opened in the assembly base 2. One side of the hydraulic core rod 8 penetrates the center of the drill rod body 1 and is inserted into the push groove 9 and is provided with a sealing insert 11. A combined thread groove is opened at the center of one side of the assembly base 2 located at the push groove 9. The assembly base 2 is sleeved with the external thread of the assembly screw 7 through the combined thread groove. The hydraulic core rod 8 is horizontally connected to the center of the push groove 9 on one side. A sealing insert 11 is provided, and the sealing insert 11 is connected to the plug-in assembly screw 7 through a plurality of sealing rings. When the reaming tool box 3 needs to be connected to the assembly base 2, the prismatic docking rod 6 of the water jet drill bit 5 is inserted into the prismatic groove of the extended assembly sleeve 4, and the assembly screw 7 is extended out of the reaming tool box 3, and is rotated and combined with the assembly base 2 through the external thread. As the thread is tightened, the reaming tool box 3 is combined, pressed and aligned with the assembly base 2. The setting of the prismatic docking rod 6 can provide torsional stability when the drill pipe body 1 drives the reaming tool box 3, the extended assembly sleeve 4 and the water jet drill bit 5 to rotate.

[0033] A control and adjustment component is set to adjust and control the blade wing 13 to meet the needs of different hole expansion diameters. The control and adjustment component includes a hydraulic core rod 8, two adjustment plates 22 and four control gear sleeves 16. The hydraulic core rod 8 is movably inserted into the drill rod body 1. The two adjustment plates 22 are respectively arranged on both sides of the hole expansion knife box 3. The blade wing 13 is connected to the adjustment plate 22. The upper and lower sides of the hole expansion knife box 3 are respectively provided with storage grooves 12. The two blade wings 13 are respectively placed in the two storage grooves 12. A synchronization key hole 14 is opened on one side of the blade wing 13. Self-rotation tooth grooves 15 are opened on both sides of the synchronization key hole 14 near the two blade wings 13 in the hole expansion knife box 3. The four control gear sleeves 16 are respectively rotatably inserted into the four self-rotation tooth grooves 15. The hole expansion knife box 3 is located at the self-rotation tooth grooves 15 and away from the storage grooves. A disassembly groove 28 is provided on one side of 12, and the two sides of the control gear sleeve 16 are respectively inserted into the receiving groove 12 and the disassembly groove 28 through the sealing shaft through the two sides of the rotation gear groove 15. The center of the control gear sleeve 16 is penetrated by a spline groove, and the spline groove of the control gear sleeve 16 is corresponding to the synchronous key hole 14 of the blade wing 13. The centers of the two control gear sleeves 16 on one side of the reaming knife box 3 are horizontally penetrated and inserted with a spline shaft 17, and the blade wing 13 is sleeved with the spline shaft 17 through the synchronous key hole 14. When the control gear sleeve 16 rotates, the spline shaft 17 can be used to symmetrically control the reaming knife box 3 to be flipped, so that the blade wing 13 extends out of the receiving groove 12, and the reaming diameter changes. In addition, the independent receiving groove 12 design prevents external mud from contaminating the hydraulic core rod 8 during the reaming operation.

[0034] A control inner cavity 18 is vertically connected and opened between two adjacent self-rotating tooth grooves 15 in the reaming knife box 3. Two adjustment plates 22 are movably inserted into the two control inner cavities 18 respectively. Two guide rods 20 are horizontally arranged on the side of the control inner cavity 18 away from the assembly base 2. The adjustment plates 22 are located on one side of the two guide rods 20 and are each provided with a guide plate 19. The guide plates 19 are movably sleeved with the two guide rods 20, and a return spring 21 is sleeved on one side of the guide rods 20. The adjustment plates 22 can maintain the basic position in the control inner cavity 18 through the guide plates 19 and the guide rods 20.

[0035] A plurality of toggle teeth are symmetrically provided on one side of the adjustment plate 22 close to the control gear sleeve 16. One side of the two control gear sleeves 16 are respectively inserted into the control inner cavity 18 and meshed with the toggle teeth of the adjustment plate 22. Both sides of the assembly base 2 close to the control inner cavity 18 are connected to the push groove 9 and are provided with docking grooves 23. One side of the two adjustment plates 22 respectively moves through the control inner cavity 18 and the docking groove 23 and is inserted into the push groove 9. Contact plates 24 are provided on both sides of the hydraulic control core rod 8 located in the push groove 9, and one side of the adjustment plate 22 inserted in the push groove 9 abuts against the contact plate 24. When the hydraulic control core rod 8 pushes the contact plate 24 to push the adjustment plate 22 to move in the control inner cavity 18, the control gear sleeve 16 is controlled to rotate synchronously under the toggle action of the toggle teeth, and then the blade 13 is controlled to flip out of the storage groove 12 under the action of the spline bar of the spline shaft 17.

[0036] In this embodiment: when the hole expansion operation is performed, high-pressure water is fed into the hydraulic core rod 8, and the hydraulic pushing device controls the horizontal movement of the hydraulic core rod 8. During this period, the drilling equipment controls the drill rod body 1, the hole expansion knife box 3, the extension assembly sleeve 4 and the water jet drill bit 5 to rotate, and the high-pressure water is injected from the water jet drill bit 5 through the sealing insert 11 and the assembly spiral tube 7. The horizontal movement of the hydraulic core rod 8 controls the contact plate 24 to horizontally control the adjustment plate 22, and then under the meshing action of the toggle tooth and the control gear sleeve 16, the spline shaft 17 and the blade 13 are controlled to be flipped and adjusted to achieve different degrees of hole expansion operations.

[0037] Embodiment 2: On the basis of embodiment 1, a constraint component is provided to stably maintain the combined state of the assembly base 2 and the reaming knife box 3, and at the same time, the position of the spline shaft 17 can be constrained and limited. The constraint component is plugged into the four sides of the assembly base 2 and the reaming knife box 3, and the constraint component includes four constraint stabilizing rods 26. One side in the disassembly groove 28 and the four sides of the assembly base 2 are horizontally provided with rod grooves 25. One side of the four constraint stabilizing rods 26 respectively movably penetrates the four rod grooves 25 of the assembly base 2 and is plugged into the rod groove 25 of the reaming knife box 3. One side of the rod groove 25 placed in the disassembly groove 28 is respectively abutted against one side of the spline shaft 17 placed in the disassembly groove 28. The rod groove 25 is located on one side of the reaming knife box 3 and is plugged into the rod groove 25, and a restraining bolt is provided. A restraining block is provided at the rod groove 25 away from the reaming knife box 3, and the cross-sectional area of ​​the restraining block is larger than the cross-sectional area of ​​the rod groove 25. When the restraining stabilizing rod 26 is plugged into the rod groove 25 of the reaming knife box 3, the restraining stabilizing rod 26 abuts against the side of the spline shaft 17, and limits the two ends of the spline shaft 17 where the two control gear sleeves 16 are plugged, and does not affect the rotation activity of the spline shaft 17, so that the spline shaft 17 and the blade wing 13 can be replaced conveniently. At the same time, the restraining stabilizing rod 26 abuts against the side of the replacement groove 28, so as to maintain the combined state of the assembly base 2 and the reaming knife box 3 and improve the support strength for rotation.

[0038] 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 hydraulic hole expansion device for mechanical hole-making coal seam permeability enhancement, characterized in that: include: A drill rod body (1), wherein an assembly base (2) is provided on one side of the drill rod body (1), a hole forming assembly is installed on one side of the assembly base (2), and the hole forming assembly comprises a hole expanding knife box (3), a water jet drill bit (5) and two blade wings (13), one side of the water jet drill bit (5) passes through the hole expanding knife box (3) and is fixedly connected to the assembly base (2), and the two blade wings (13) are respectively movably plugged into two sides of the hole expanding knife box (3); A control and adjustment component, the control and adjustment component comprising a hydraulic control core rod (8), two adjustment plates (22) and four control gear sleeves (16), the hydraulic control core rod (8) is movably inserted into the drill rod body (1), the two adjustment plates (22) are respectively arranged on both sides of the reaming knife box (3), and the knife wing (13) is connected to the adjustment plate (22); A constraint component is inserted into the four sides of the assembly base (2) and the reaming knife box (3), and the constraint component includes four constraint stabilizing rods (26).

2. A hydraulic hole-expanding device for mechanical hole-making coal seam permeability enhancement according to claim 1, characterized in that: One side of the hole-expanding knife box (3) is fitted with the assembly base (2); an extended assembly sleeve (4) is provided on the side of the hole-expanding knife box (3) away from the assembly base (2); a prismatic groove is provided on one side of the extended assembly sleeve (4); a prismatic docking rod (6) is horizontally provided on one side of the water jet drill bit (5); and the prismatic docking rod (6) is plugged into the prismatic groove of the extended assembly sleeve (4).

3. A hydraulic hole-expanding device for mechanically cavitating coal seam permeability enhancement according to claim 2, characterized in that: An assembling screw tube (7) is horizontally arranged at the center of one side of the prismatic docking rod (6). The assembling screw tube (7) movably passes through the center of the hole expansion knife box (3) and is provided with an external thread. The diameter of the assembling screw tube (7) is smaller than the diameter of the prismatic docking rod (6).

4. A hydraulic hole-expanding device for mechanically cavitating coal seam permeability enhancement according to claim 3, characterized in that: The assembly base (2) is provided with a push groove (9), one side of the hydraulic control core rod (8) penetrates through the center of the drill rod body (1) and is plugged into the push groove (9) and is provided with a sealing insert (11), a combined thread groove is provided through the center of one side of the assembly base (2) located at the push groove (9), the assembly base (2) is sleeved with the external thread of the assembly screw tube (7) through the combined thread groove, the center of the hydraulic control core rod (8) located at one side of the push groove (9) is horizontally connected with a sealing insert tube (11), and the sealing insert tube (11) is connected and plugged into the assembly screw tube (7) through a plurality of sealing rings.

5. A hydraulic hole-expanding device for mechanical hole-making and coal seam permeability enhancement according to claim 4, characterized in that: The reaming knife box (3) is provided with receiving grooves (12) on the upper and lower sides respectively, and two blade wings (13) are respectively placed in the two receiving grooves (12); a synchronous key hole (14) is provided on one side of the blade wing (13); self-rotating tooth grooves (15) are provided on both sides of the synchronous key hole (14) close to the two blade wings (13) in the reaming knife box (3); four control gear sleeves (16) are respectively rotatably inserted into the four self-rotating tooth grooves (15); a disassembly groove (28) is provided on one side of the reaming knife box (3) located at the self-rotating tooth groove (15) and away from the receiving groove (12); and both sides of the control gear sleeve (16) are inserted into the receiving groove (12) and the disassembly groove (28) through the sealing shaft respectively.

6. A hydraulic hole-expanding device for mechanical hole-making and coal seam permeability enhancement according to claim 5, characterized in that: The center of the control gear sleeve (16) is penetrated by a spline groove, and the spline groove of the control gear sleeve (16) is arranged corresponding to the synchronous key hole (14) of the blade wing (13). The centers of the two control gear sleeves (16) on one side of the hole expansion knife box (3) are horizontally penetrated by a spline shaft (17), and the blade wing (13) is sleeved with the spline shaft (17) through the synchronous key hole (14).

7. A hydraulic hole-expanding device for mechanical hole-making and coal seam permeability enhancement according to claim 6, characterized in that: The expansion knife box (3) is provided with a control inner cavity (18) vertically connected between two adjacent self-rotating tooth grooves (15), two adjustment plates (22) are movably inserted into the two control inner cavities (18), two guide rods (20) are horizontally arranged on one side of the control inner cavity (18) away from the assembly base (2), the adjustment plate (22) is provided with a guide plate (19) on one side of the two guide rods (20), the guide plate (19) is movably sleeved with the two guide rods (20), and a return spring (21) is sleeved on one side of the guide rods (20).

8. A hydraulic hole-expanding device for mechanical hole-making and coal seam permeability enhancement according to claim 7, characterized in that: A plurality of shifting teeth are symmetrically arranged on one side of the adjustment plate (22) close to the control gear sleeve (16); one side of the two control gear sleeves (16) is respectively inserted into the control inner cavity (18) and meshed with the shifting teeth of the adjustment plate (22).

9. A hydraulic hole-expanding device for mechanical hole-making and coal seam permeability enhancement according to claim 8, characterized in that: Both sides of the assembly base (2) close to the control inner cavity (18) are connected to the push groove (9) and are provided with docking grooves (23); one side of the two adjustment plates (22) respectively movably penetrates the control inner cavity (18) and the docking groove (23) and is inserted into the push groove (9); both sides of the hydraulic control core rod (8) located in the push groove (9) are provided with contact plates (24), and the side of the adjustment plate (22) inserted into the push groove (9) is in contact with the contact plate (24).

10. A hydraulic hole-expanding device for mechanically cavitating coal seam permeability enhancement according to claim 9, characterized in that: One side of the disassembly groove (28) and four sides of the assembly base (2) are horizontally provided with rod grooves (25); one side of four constraining stabilizing rods (26) respectively movably penetrates through the four rod grooves (25) of the assembly base (2) and is inserted into the rod groove (25) of the hole expansion knife box (3); one side of the rod groove (25) disposed in the disassembly groove (28) is respectively abutted against one side of the spline shaft (17) disposed in the disassembly groove (28); and a constraining bolt is provided on one side of the rod groove (25) of the hole expansion knife box (3) that is inserted into the rod groove (25).

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