CN114109271B - Barrel drill for rotary drilling rig - Google Patents
Barrel drill for rotary drilling rig Download PDFInfo
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- CN114109271B CN114109271B CN202111284369.6A CN202111284369A CN114109271B CN 114109271 B CN114109271 B CN 114109271B CN 202111284369 A CN202111284369 A CN 202111284369A CN 114109271 B CN114109271 B CN 114109271B
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- 238000005553 drilling Methods 0.000 title claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a barrel drill for a rotary drilling rig, which comprises a barrel drill body, wherein the barrel drill body is provided with a top plate and a square sleeve; the cylindrical drill also comprises two arc-shaped righting plates; a semicircular end plate is fixed at the lower end of each arc-shaped centralizing plate, and two triangular notches of the two semicircular end plates are closed to form a rectangular through hole for the square sleeve to pass through; the lower surface of each semicircular end plate is provided with two straight cutting and an arc cutting; each half area of the top plate is provided with two y-direction jacks and one x-direction jack; the arc-shaped cutting of each semicircular end plate penetrates through and hooks the x-direction jack of the same side half area of the top plate, and the two straight cutting of each semicircular end plate are respectively inserted into the two y-direction jacks of the same side half area of the top plate; the four sides of the two arc-shaped righting plates are abutted against each other; the upper parts of the two arc-shaped centering plates are respectively provided with a connecting beam, one side connecting beam is provided with an upper mounting plate, the other side connecting beam is provided with a lower mounting plate, and the upper mounting plates are in threaded connection with the corresponding lower mounting plates. The barrel drill can effectively improve the drill-down verticality and is convenient to assemble.
Description
Technical Field
The invention relates to the technical field of pile foundation construction mechanical equipment, in particular to a cylindrical drill for a rotary drilling rig.
Background
The rotary drilling rig has the advantages of high work efficiency, no pollution, wide adaptive stratum and the like, and is widely and increasingly applied to pile foundation construction. In the construction process, the rotary drilling rig transmits torque and pressure to the barrel drill through the drill rod, and the barrel drill is used as a key component of the rotary drilling rig, so that the energy efficiency of the drilling rig is directly determined.
The traditional rotary drilling rig barrel drill comprises a barrel drill body with a downward opening, a cutting pick or a ball tooth is arranged on the bottom ring surface of the barrel drill body, a top plate is arranged at the top end of the barrel drill body, a square sleeve is arranged on the top plate, a square joint is arranged at the bottom end of a drill rod, the square joint stretches into the square sleeve, and the square joint and the square sleeve are fixed through two mutually perpendicular bolts; in order to strengthen the connection between the square sleeve and the cylindrical drill body, four triangular rib plates are welded at four corners of the square sleeve, namely, the vertical edge of each triangular rib plate is welded with the edge of one corner of the square sleeve, and the bottom edge of each triangular rib plate is welded with the top plate.
The working process of the barrel drill is as follows: the rotary drilling rig drives the drill rod so as to drive the cylindrical drill body to downwards drill, teeth on the bottom ring surface of the cylindrical drill body and the hard soil layer or the weathered basic rock layer are continuously ground and crushed to form an annular groove, and the annular groove is continuously deepened along with the drill tool to form a columnar soil core or rock core separated from the hard soil layer or the rock layer main body in the cylindrical drill body; when the length of the columnar soil core or rock core is developed to a certain value such as 0.8m, the soil core or rock core can be broken by the inclined plane of the inner wall of the barrel drill body, and then the drill rod is pulled out of the drill hole, so that the broken soil core or rock core in the barrel drill is thrown out.
The above-described barrel drill has the following problems in actual operation. The geological conditions of the hard soil layer or the weathered base stratum which are actually drilled are complex, and the hardness of the section of the drill collar of the barrel at different circumferential positions is often uneven, so that the resistance generated by the barrel drill is uneven, and the verticality of the drill is poor; or because of design defect of the rotary drilling rig, once the output power or output pressure of the drilling rig is too large, the perpendicularity of drilling of a drill rod is often caused, and the drilling is difficult to be carried out vertically, so in order to make up the design defect, two methods of sacrificing efficiency or increasing the dead weight of the drilling rig are generally adopted in the industry, or the output pressure and the output power of the drilling process are actively reduced, the drilling speed is slowed down, so that the vertical drilling is ensured, but the working efficiency is reduced, and the construction period is prolonged; or larger and heavier drills are used, but this increases the cost and energy consumption and places high demands.
It is also proposed in the industry to use a significantly larger height barrel drill to enhance the righting effect when running down, for example, a conventional barrel drill of 1 meter and a2 meter Gao Jiachang barrel drill to ensure vertical down. However, the above-mentioned assumption cannot be implemented in practical construction, and the bottleneck is that the height of the top end of the mast of the rotary drilling rig is fixed, the upper limit position of the top end of the drill rod is flush with the top end of the mast, that is, the upper limit height of the top end of the drill rod is fixed, so that the maximum ground clearance of the lower end of the drill rod is fixed, the height of the barrel drill installed on the drill rod cannot exceed the maximum ground clearance of the lower end of the drill rod, so that the common barrel drill can be smoothly installed, but the height of the lengthened barrel drill obviously exceeds the maximum ground clearance of the drill rod, and the assembly cannot be naturally performed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cylindrical drill for a rotary drilling rig, which can effectively improve the drill tripping verticality and is convenient to assemble.
The technical scheme of the invention is that the cylindrical drill for the rotary drilling rig comprises a cylindrical drill body, wherein the top end of the cylindrical drill body is provided with a top plate and a square sleeve for being in butt joint with a drill rod; the cylindrical drill also comprises two arc-shaped righting plates which are bilaterally symmetrical; a semicircular end plate is fixed at the lower end of each arc-shaped centralizing plate, a triangular notch is penetrated through the center of each semicircular end plate, and the two triangular notches of the two semicircular end plates are closed to form a rectangular through hole for the square sleeve to penetrate through; two straight cutting and an outwards turned arc cutting are arranged on the lower surface of each semicircular end plate, the arc cutting is positioned at an outer position on the width central line of the semicircular end plate, and the two straight cutting are respectively arranged at two sides of the width central line; the top plate is divided into a left half area and a right half area, and each half area of the top plate is provided with two y-direction jacks and one x-direction jack; the arc-shaped cutting of each semicircular end plate penetrates through and hooks the x-direction jack of the same side half area of the top plate, and the two straight cutting of each semicircular end plate are respectively inserted into the two y-direction jacks of the same side half area of the top plate; the four sides of the two arc-shaped righting plates are abutted against each other; the upper parts of the two arc-shaped centering plates are respectively provided with a connecting beam, one side of the connecting beam is connected with the Liang Xuantiao end to be provided with an upper mounting plate, the overhanging end of the connecting beam at the other side of the connecting beam is provided with a lower mounting plate, and the upper mounting plate and the corresponding lower mounting plate are mutually abutted and screwed.
Compared with the prior art, the barrel drill for the rotary drilling rig with the structure has the following advantages.
When the verticality is difficult to ensure in the drilling process of the cylindrical drill, lifting the cylindrical drill, enabling the top end of the cylindrical drill to be slightly higher than the ground, hoisting two arc-shaped righting plates, firstly tilting the arc-shaped righting plates to enable arc-shaped cutting slips on a semicircular end plate of the arc-shaped righting plates to be inserted into x-direction insertion holes of a corresponding half area of the cylindrical drill top plate, then swinging the arc-shaped righting plates to enable the arc-shaped cutting slips to be vertical, and synchronously inserting two straight cutting slips of the semicircular end plate into two y-direction insertion holes of the corresponding half area in the swinging process to be vertical; thus, the two arc-shaped centering plates are connected in a swinging way, and the four sides of the two arc-shaped centering plates are abutted one by one, so that a complete centering cylinder is closed; and the connecting beam of each arc-shaped righting plate and the connecting beam of the other arc-shaped righting plate are mutually overlapped and abutted in a vertical state, so that the upper mounting plate and the lower mounting plate of the overhanging ends of the two connecting beams can be locked by bolts to finish assembly.
According to the analysis, the centering device is convenient and quick to assemble, and only the arc cutting is clamped firstly, then the arc centering plate is swung to enable the arc cutting to be vertical, and the bolt of the upper connecting beam is locked; moreover, the application breaks through the conventional thinking of directly replacing the heightening barrel drill, so that the drill rod does not need to be lifted to the greatest extent to vacate the assembly space of the barrel drill like the prior art, and only the drill rod needs to be lifted up to a small extent to enable the top of the barrel drill to be level with the ground, and a centralizing barrel is additionally arranged on the top plate of the barrel drill with common height; after the centralizing cylinder is assembled, the lower end is firmly hooked by virtue of the arc-shaped cutting, the straight cutting is stably inserted, the middle part is abutted against each other by virtue of the side edges of the arc-shaped centralizing plate, and the upper end is locked by the triple butt joint structure of the connecting beam in a threaded manner, so that the firmness and the integrity of the connection of the centralizing cylinder and the cylinder drill body can be ensured; meanwhile, the effect of obviously heightening the height of the barrel drill is realized, the righting energy efficiency is strong, and the verticality of the barrel drill in the drilling process is obviously improved; the cylindrical drill ensures vertical down drilling, simultaneously does not reduce the down drilling speed, increases the dead weight and model of the drilling machine, saves energy, protects environment, has small requirements on sites and can not delay the construction period.
Preferably, the upper end of the inner circumferential surface of the left arc-shaped righting plate is welded with two connecting beams, and the upper end of the inner circumferential surface of the right arc-shaped righting plate is correspondingly welded with two connecting beams; the left connecting beam is used for fixing the lower mounting plate, and the right connecting beam is used for fixing the upper mounting plate; the upper mounting plate is provided with a round hole, the lower mounting plate is provided with a waist-shaped hole, and the upper mounting plate and the corresponding lower mounting plate are fixed through bolts penetrating through the round hole and the waist-shaped hole; therefore, the upper ends of the two arc-shaped straightening plates are fixed by means of butt joint of two groups of four connecting beams, the upper ends of the two arc-shaped straightening plates are stressed uniformly and firmly, and the integrity and the firmness are good; moreover, for each group of mutually-butted connecting beams, the waist-shaped holes are arranged, so that bolts can pass through the waist-shaped holes on the upper round holes and the lower round holes at the same time, and the installation is further convenient.
As another preferable mode, an arc-shaped notch for avoiding the top plate is formed in the area, located outside the arc-shaped cutting, of the semicircular end plate; therefore, when the arc-shaped cutting of the semicircular end plate is inserted into the x-direction jack of the same half area of the top plate, the arc-shaped straightening plate and the corner of the semicircular end plate interfere with touching the top plate, and the arc-shaped cutting is hooked, spliced and assembled.
As another preferable mode, a reinforcing plate is arranged in the barrel cavity of the barrel drill body and close to the top plate, and the reinforcing plate is welded with the side wall of the barrel drill body; the top plate is provided with a rectangular through hole, the square sleeve penetrates through the rectangular through hole, and the bottom end of the square sleeve is welded with the reinforcing plate; four triangular rib plates are welded on four edges of the square sleeve, the bottom edge of each triangular rib plate is welded with the reinforcing plate, and the welding seams extend from the square sleeve to the outer edge of the reinforcing plate; four straight-cut grooves extend from four corners of the rectangular through hole of the top plate, four triangular rib plates penetrate the top plate through the four straight-cut grooves, each triangular rib plate is welded with the groove wall of the corresponding straight-cut groove, and gaps exist between the outer end of each straight-cut groove and the outer edge of the top plate; the x-direction jack of each half area of the top plate is positioned in the gap between the y-direction straight notch of the same half area and the outer edge of the top plate.
Firstly, carrying out reverse analysis on the preferable structure, if a reinforcing plate is not arranged, the welding seam at the bottom edge of the triangular rib plate is required to be kept long enough to ensure the firmness of the square sleeve and the cylindrical drill body, namely, the welding seam is required to extend from the square sleeve to the outer edge of the top plate, so that the y-direction triangular rib plate is required to interfere and overlap with the x-direction jack, and the arc-shaped cutting cannot be inserted into and hooked with the x-direction jack; therefore, a fixing plate is creatively welded in the barrel cavity of the barrel drill body, the bottom end of the square sleeve and the bottom edge of the triangular rib plate are welded with the fixing plate, so that the welding seam of the bottom edge of the triangular rib plate extends from the square sleeve to the outer edge of the reinforcing plate, the sufficient bottom welding seam length is ensured, and the welding firmness of the square sleeve and the barrel drill body is ensured, namely the butt joint firmness of the barrel drill body and the drill rod is ensured; moreover, the middle part of the triangular rib plate is objectively led to pass through the top plate instead of the bottom end, so that the penetrating and welding length of the triangular rib plate and the top plate is smoothly shortened, the welding seam of the triangular rib plate and the top plate is successfully shortened to a reasonable range, a gap is reserved between the y-direction straight notch and the outer edge of the top plate, and the space for arranging the x-direction jack is just vacated, so that the arc-shaped cutting of each semicircular end plate is firmly hooked and clamped with the top plate, and the arc-shaped righting plate is firmly connected with the cylindrical drill body. In conclusion, the arc-shaped centering plate is firmly connected with the cylindrical drill body, and the square sleeve, the triangular rib plate and the cylindrical drill body are firmly welded, namely firm butt joint of the drill rod and the cylindrical drill body is ensured.
Drawings
Fig. 1 is a schematic view of a barrel drill for a rotary drilling machine according to the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 after being deflected by a certain angle.
Fig. 3 is a schematic view of the structure of the arc-shaped centering plate of the drum drill for the rotary drilling machine of the present invention when assembled.
Fig. 4 is a schematic view of the structure of fig. 3 after being deflected by a certain angle.
Fig. 5 is a schematic view of the barrel drill for the rotary drilling rig of the present invention with the arc-shaped centralizing plate removed.
Fig. 6 is a schematic view of the structure of fig. 5 with the top plate detached.
The drill body, 2, roof, 3, drilling rod, 4, square cover, 5, arc righting board, 6, semicircle end plate, 7, triangle breach, 8, straight cutting, 9, arc cutting, 10, y to jack, 11, x to jack, 12, tie beam, 13, upper mounting plate, 14, lower mounting plate, 15, bolt, 16, arc lack groove, 17, gusset plate, 18, rectangle via hole, 19, triangle rib plate, 20, pick, 21, bolt, 22, long slot, 23, straight lack groove are shown in the figure.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1 to 6, the barrel drill for the rotary drilling rig comprises a barrel drill body 1 with a downward opening, and a cutting pick 20 or a ball tooth is arranged on the bottom ring surface of the barrel drill body 1. The top end of the barrel drill body 1 is provided with a top plate 2 and a square sleeve 4 for being in butt joint with the drill rod 3; namely, the square sleeve 4 is provided with two groups of horizontal pin holes which are mutually perpendicular, the square joint at the bottom end of the drill rod 3 stretches into the square sleeve 4, and the square joint and the square sleeve 4 are fixed through two mutually perpendicular bolts 21.
The barrel drill also comprises two arc-shaped righting plates 5 which are bilaterally symmetrical; a semicircular end plate 6 is fixed at the lower end of each arc-shaped righting plate 5, and the arc-shaped righting plates 5 and the semicircular end plates 6 at the lower ends of the arc-shaped righting plates are integrated. The circle center of each semicircular end plate 6 is penetrated with a triangular notch 7, and the two triangular notches 7 of the two semicircular end plates 6 are closed to form a rectangular through hole for the square sleeve 4 to pass through. The lower surface of each semicircular end plate 6 is provided with two straight cutting bars 8 and an outwards turned arc cutting bar 9, wherein the arc cutting bar 9 is positioned at an outer position on the width central line of the semicircular end plate 6, namely, the arc cutting bar 9 is positioned on the width central line of the semicircular end plate 6 and the arc cutting bar 9 is close to the arc edge of the semicircular end plate 6; the area of the semicircular end plate 6 located outside the arc-shaped cutting 9 is provided with an arc-shaped notch 16 for avoiding the top plate 2. And two straight cutting bars 8 are respectively arranged at two sides of the width center line of the semicircular end plate 6.
The top plate 2 is divided into a left half area and a right half area, and each half area of the top plate 2 is provided with two y-direction jacks 10 and one x-direction jack 11; the arc-shaped cutting 9 of each semicircular end plate 6 penetrates through and hooks the x-direction insertion holes 11 of the same side half area of the top plate 2, and the two straight cutting 8 of each semicircular end plate 6 are respectively inserted into the two y-direction insertion holes 10 of the same side half area of the top plate 2. In popular terms, the arc-shaped cutting 9 and the straight cutting 8 of the left semicircular end plate 6 are inserted into the x-direction inserting hole 11 and the y-direction inserting hole 10 of the left half area of the top plate 2; the arc-shaped cutting 9 and the straight cutting 8 of the right semicircular end plate are inserted into the x-direction insertion hole 11 and the y-direction insertion hole 10 of the right half area of the top plate 2.
The four side edges of the two arc-shaped righting plates 5 are abutted against each other; i.e. the left side edge of the left arc straightening plate 5 abuts against the right side edge of the right arc straightening plate 5, and the right side edge of the left arc straightening plate 5 abuts against the left side edge of the right arc straightening plate 5.
The upper parts of the two arc-shaped centering plates 5 are respectively provided with a connecting beam 12, the overhanging end of one connecting beam 12 is provided with an upper mounting plate 13, the overhanging end of the other connecting beam 12 is provided with a lower mounting plate 14, and the upper mounting plate 13 and the corresponding lower mounting plate 14 are mutually abutted and screwed. Specifically, two connecting beams 12 are welded at the upper end of the inner circumferential surface of the left arc-shaped righting plate 5, and two connecting beams 12 are correspondingly welded at the upper end of the inner circumferential surface of the right arc-shaped righting plate 5; the left connecting beam 12 fixes the lower mounting plate 14 and the right connecting beam 12 fixes the upper mounting plate 13; the upper mounting plate 13 is provided with a round hole and the lower mounting plate 14 is provided with a kidney-shaped hole, and the upper mounting plate 13 and the corresponding lower mounting plate 14 are fixed by bolts 15 penetrating through the round hole and the kidney-shaped hole.
A reinforcing plate 17 is arranged in the barrel cavity of the barrel drill body 1 and close to the top plate 2, and the reinforcing plate 17 is welded with the side wall of the barrel drill body 1. The top plate 2 is provided with a rectangular through hole 18, the square sleeve 4 penetrates through the rectangular through hole 18, and the bottom end of the square sleeve 4 is welded with the reinforcing plate 17; four triangular rib plates 19 are welded to the four edges of the square sleeve 4, the bottom edge of each triangular rib plate 19 is welded to the reinforcing plate 17, and the welding lines extend from the square sleeve 4 to the outer edge of the reinforcing plate 17. Four straight-cut grooves 23 extend from four corners of the rectangular through hole 18 of the top plate 2, four triangular rib plates 19 penetrate through the top plate 2 through the four straight-cut grooves 23, each triangular rib plate 19 is welded with the groove wall of the corresponding straight-cut groove 23, and a gap exists between the outer end of each straight-cut groove 23 and the outer edge of the top plate 2. The x-direction insertion holes 11 of each half of the top plate 2 are positioned in the gap between the y-direction straight notch 23 of the same half and the outer edge of the top plate 2.
Of course, after the two semicircular end plates 6 are closed, four long slots 22 are also arranged at four corners of the rectangular through hole in the center, the square sleeve 4 passes through the rectangular through holes of the two semicircular end plates 6, and four triangular rib plates 19 pass through the two semicircular end plates 6 through the four long slots 22.
In the actual drilling process, in order to avoid increasing the drilling resistance of the left and right arc-shaped centralizing plates 5, spiral raised strips can be arranged on the outer circumferential surfaces of the two arc-shaped centralizing plates 5, so that scraping between the arc-shaped centralizing plates 5 and the wall of a drilling hole is reduced, and the side friction resistance of a barrel drill during the drilling is reduced.
Claims (4)
1. A cylindrical drill for a rotary drilling rig comprises a cylindrical drill body (1), wherein a top plate (2) and a square sleeve (4) for being in butt joint with a drill rod (3) are arranged at the top end of the cylindrical drill body (1); the method is characterized in that: the cylindrical drill also comprises two arc-shaped righting plates (5) which are bilaterally symmetrical; a semicircular end plate (6) is fixed at the lower end of each arc-shaped righting plate (5), a triangular notch (7) is penetrated through the center of each semicircular end plate (6), and the two triangular notches (7) of the two semicircular end plates (6) are closed to form a rectangular through hole for the square sleeve (4) to penetrate through; two straight cutting strips (8) and an outwards turned arc cutting strip (9) are arranged on the lower surface of each semicircular end plate (6), the arc cutting strip (9) is positioned at an outer position on the width central line of the semicircular end plate (6), and the two straight cutting strips (8) are respectively arranged on two sides of the width central line; the top plate (2) is divided into a left half area and a right half area, and each half area of the top plate (2) is provided with two y-direction jacks (10) and one x-direction jack (11); the arc-shaped cutting (9) of each semicircular end plate (6) penetrates through and hooks the x-direction jack (11) of the same side half area of the top plate (2), and the two straight cutting (8) of each semicircular end plate (6) are respectively inserted into the two y-direction jacks (10) of the same side half area of the top plate (2); the four sides of the two arc-shaped righting plates (5) are abutted against each other; the upper parts of the two arc-shaped centering plates (5) are respectively provided with a connecting beam (12), the overhanging end of one connecting beam (12) is provided with an upper mounting plate (13), the overhanging end of the other connecting beam (12) is provided with a lower mounting plate (14), and the upper mounting plate (13) and the corresponding lower mounting plate (14) are mutually abutted and in threaded connection;
When the perpendicularity is difficult to ensure in the drilling process of the barrel drill, the barrel drill is lifted up, so that the top end of the barrel drill is slightly higher than the ground, and then the two arc-shaped centering plates are assembled.
2. A drum drill for a rotary drilling rig according to claim 1, wherein: two connecting beams (12) are welded at the upper end of the inner circumferential surface of the left arc-shaped righting plate (5), and two connecting beams (12) are correspondingly welded at the upper end of the inner circumferential surface of the right arc-shaped righting plate (5); the left connecting beam (12) is used for fixing the lower mounting plate (14) and the right connecting beam (12) is used for fixing the upper mounting plate (13); the upper mounting plate (13) is provided with a round hole, the lower mounting plate (14) is provided with a kidney-shaped hole, and the upper mounting plate (13) and the corresponding lower mounting plate (14) are fixed through bolts (15) penetrating through the round hole and the kidney-shaped hole.
3. A drum drill for a rotary drilling rig according to claim 1, wherein: the area of the semicircular end plate (6) positioned outside the arc-shaped cutting (9) is provided with an arc-shaped notch (16) for avoiding the top plate (2).
4. A drum drill for a rotary drilling rig according to claim 1, wherein: a reinforcing plate (17) is arranged in the barrel cavity of the barrel drill body (1) and close to the top plate (2), and the reinforcing plate (17) is welded with the side wall of the barrel drill body (1); the top plate (2) is provided with a rectangular through hole (18), the square sleeve (4) penetrates through the rectangular through hole (18), and the bottom end of the square sleeve (4) is welded with the reinforcing plate (17); four triangular rib plates (19) are welded on four edges of the square sleeve (4), the bottom edge of each triangular rib plate (19) is welded with the reinforcing plate (17), and the welding seam extends from the square sleeve (4) to the outer edge of the reinforcing plate (17); four straight-cut grooves (23) are formed in four corners of the rectangular through hole (18) of the top plate (2) in an extending mode, four triangular rib plates (19) penetrate through the top plate (2) through the four straight-cut grooves (23), each triangular rib plate (19) is welded with the groove wall of the corresponding straight-cut groove (23), and gaps exist between the outer end of each straight-cut groove (23) and the outer edge of the top plate (2); the x-direction insertion holes (11) of each half area of the top plate (2) are positioned in the gap between the y-direction straight notch (23) of the same half area and the outer edge of the top plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284369.6A CN114109271B (en) | 2021-11-01 | 2021-11-01 | Barrel drill for rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284369.6A CN114109271B (en) | 2021-11-01 | 2021-11-01 | Barrel drill for rotary drilling rig |
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| Publication Number | Publication Date |
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| CN114109271A CN114109271A (en) | 2022-03-01 |
| CN114109271B true CN114109271B (en) | 2024-06-07 |
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