CN112252989A - Ultra-large-diameter rotary drilling bit - Google Patents
Ultra-large-diameter rotary drilling bit Download PDFInfo
- Publication number
- CN112252989A CN112252989A CN202011004109.4A CN202011004109A CN112252989A CN 112252989 A CN112252989 A CN 112252989A CN 202011004109 A CN202011004109 A CN 202011004109A CN 112252989 A CN112252989 A CN 112252989A
- Authority
- CN
- China
- Prior art keywords
- cutting
- chassis
- opening
- plate
- closing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
Landscapes
- 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
A rotary drilling bit with an ultra-large diameter comprises a barrel, a cutting disc and an opening and closing device, wherein the barrel and a chassis form an openable connection, a chassis reinforcing box body is arranged on the chassis, a cutting disc reinforcing plate is welded in the middle of the lower surface of the cutting disc, and a central shaft penetrates through the chassis, the chassis reinforcing box body, the cutting disc and the cutting disc reinforcing plate; the lower surface of the cutting disc is provided with a cutting toothed plate reinforcing rib; the inclination angle beta of the cutting toothed plate relative to the cutting disc is 45-60 degrees; the cylinder, the upper disc and the base disc are designed with reinforcing structures. The advantages of the invention are as follows: 1. the strength and the working reliability of the cutting toothed plate are improved, and the stress of the cutting toothed plate is relatively reduced; 2. the double-lining-plate structure at the position where the rotary shaft sleeve is arranged on the cylinder body reduces the risk of tearing of a connecting welding seam; 3. the double opening and closing mechanism can ensure the construction safety and the chassis opening and closing stability; 4. the structure of the cylinder, the chassis and the upper disc is strengthened, so that the rigidity and the wear resistance of the cylinder, the chassis and the upper disc are improved, and the requirement of large load capacity is met.
Description
Technical Field
The invention relates to a rotary drilling device, in particular to an ultra-large-caliber rotary drilling bit for a rotary drilling rig.
Background
With the rapid development of economy and science and technology, super high-rise buildings, medium-and large-span bridges, ports, channel docks, ocean engineering and the like appear in large quantities, so that the basic design and construction face huge challenges. The foundation construction of large civil engineering piles is an important basic link in civil engineering. At present, a rotary drilling rig is important equipment for pile foundation construction, along with the continuous expansion of civil engineering, the performance of the rotary drilling rig is also continuously improved, and a rotary drilling bit matched with the rotary drilling rig needs to improve the structural design so as to meet the requirement of pile foundation construction with an ultra-large caliber (usually more than three meters). The drill bit is dug soon to super large bore drilling speed is fast, the effort that bears is big, dig efficiently, and the drill bit is dug soon to traditional structure can't adapt to the working condition that the drill bit was dug soon to super large bore, and the drill bit is mainly dug soon to the current has following problem: 1. the rigidity and the wear resistance of the cylinder, the upper disc and the lower disc are insufficient, and the bearing state is easy to deform in a mode; 2. the cutting disc tooth plate lacks a reliable protective structure, and the situations of tooth falling or tooth plate fracture and the like are easy to occur; 3. the welding seam is easy to tear due to the weak connecting structure of the cylinder and the chassis, and the risk that the bottom plate falls off in the construction process is stored; 4. the opening and closing mechanism has small bearing capacity, is easy to deform and has low regulation and limiting accuracy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the ultra-large-diameter rotary drilling bit which is high in reliability, long in service life and good in safety performance.
The problems of the invention are solved by the following technical scheme:
an ultra-large-diameter rotary drilling bit comprises a cylinder, a cutting disc and an opening and closing device, wherein the upper part of the cylinder is fixedly connected with an upper disc, the center of the upper disc is fixedly provided with a square head, the lower part of the cylinder and a base disc form openable and closable connection through a rotating shaft, the base disc is connected with the cutting disc through a central shaft, the cutting disc is provided with two rows of cutting toothed plates, each cutting toothed plate is respectively positioned on two sides of the central shaft, and each cutting toothed plate is provided with;
the chassis is provided with a chassis reinforced box body, the chassis reinforced box body extends from the part of the chassis close to the rotating shaft to the center of the chassis in the radial direction, the chassis reinforced box body is composed of a chassis rib plate and a chassis cover plate, the chassis rib plate is welded on the upper surface of the chassis, and the chassis cover plate is welded on the chassis rib plate; the middle part of the lower surface of the cutting disc is welded with a cutting disc reinforcing plate, and a central shaft passes through the chassis, the chassis reinforcing box body, the cutting disc and the cutting disc reinforcing plate;
four radial upper disc rib plates are welded on the top surface of the upper disc, an angle reinforcing plate is welded at the joint of the bottom surface of the upper disc and the cylinder body, and vertically and horizontally staggered upper disc pressure-bearing rib plates are arranged on the bottom surface of the upper disc;
the lower surface of the cutting disc is also provided with a plurality of cutting toothed plate reinforcing ribs, the head ends of the cutting toothed plate reinforcing ribs are connected with the back of the cutting toothed plate, and the tail ends of the cutting toothed plate reinforcing ribs extend towards the edge of the cutting disc body; the cutting toothed plate is obliquely arranged relative to the cutting disc, and the inclination angle beta is 45-60 degrees;
a muck inlet groove is formed in the upper part of the cutting disc corresponding to the cutting toothed plate, and the length of the muck inlet groove is 60% -80% of that of the cutting toothed plate;
the lower part of the periphery of the barrel is distributed with a transmission block, the upper part of the transmission block is welded with the edge of the chassis, the lower part of the transmission block touches the chassis, the upper part and the lower part of the outer wall of the barrel are distributed with a plurality of wear-resistant strips, and the wear-resistant strips are positioned at the welding seams of the barrel.
Above-mentioned drill is dug soon to super large bore, every cutting pinion rack back sets up three cutting pinion rack strengthening ribs, and the height of each cutting pinion rack strengthening rib is decremented by head end to tail end.
According to the rotary drilling bit with the ultra-large diameter, the opening and closing device comprises two sets of opening and closing mechanisms, and a power head limiting rod and an upper limiting plate which are fixed on the upper disc, wherein the upper limiting plate is fixed on the upper disc through two supporting plates; the height of the impact cap in an un-pressed state is higher than that of the power head limiting rod; the opening and closing mechanism comprises a collision cap, an upper opening and closing rod, an opening and closing connecting rod, a lower opening and closing rod, a movable hook seat, a fixed hook seat and an opening and closing hook, the collision cap is fixedly connected with the top of the upper opening and closing rod, the lower end of the upper opening and closing rod is hinged with the opening and closing connecting rod, one end of the opening and closing connecting rod is hinged with the lower opening and closing rod, the lower part of the lower opening and closing rod is fixedly connected with the movable hook seat, the movable hook seat is hinged with one end of the opening and closing hook, which is far away from a hook head, the middle part of the opening and closing hook is hinged with the; the lower part of the collision cap is provided with a guide table, the guide table is in sliding fit with the shaft hole of the upper limiting plate, the diameter of the collision cap is larger than that of the guide table, an opening-closing rod spring is sleeved on the upper opening-closing rod, and two ends of the upper opening-closing rod spring respectively touch and press the guide table and the upper disc.
The ultra-large-diameter rotary drilling bit further comprises a guide sleeve, the guide sleeve is welded with the cylinder wall, and the lower opening and closing rod penetrates through the guide sleeve and is in sliding fit with the guide sleeve.
Above-mentioned drill bit is dug soon to super large bore, the articulated balancing piece stopper of connecting rod one end that opens and shuts, and balanced stopper is the trapezoidal of invering, and the top surface and the hanging wall of balancing piece stopper constitute the going upward spacing to the motion that opens and shuts.
The drill bit is dug soon to super large-caliber, the installation position that the barrel corresponds the rotation axis is equipped with penetrating section of thick bamboo wall hole, the inside and outside side in section of thick bamboo wall hole is equipped with interior welt and outer welt relative barrel wall slope respectively, the upper portion and the barrel seam of inside and outside welt, two rotation axis side covers are welded in the barrel lower part outside, the lower part and the rotation axis side cover seam of inside and outside welt, rotatory axle sleeve seam chassis, rotatory axle sleeve is located between two rotation axis side covers, the rotation axis passes rotation axis side cover and rotatory axle sleeve.
In the ultra-large-caliber rotary drill bit, the inclination angle a1 of the inner lining plate relative to the cylinder wall is 8-12 degrees, and the inclination angle a2 of the outer lining plate relative to the cylinder wall is 4-6 degrees.
According to the rotary drilling bit with the ultra-large caliber, the wall hole of the cylinder is an arc-shaped hole, the inner lining plate and the outer lining plate are arc-shaped plates, and shaft sleeve yielding grooves are formed in straight edges of the lower portions of the inner lining plate and the outer lining plate.
According to the ultra-large-diameter rotary drilling bit, the outer side end of each rotating shaft side sleeve is an inclined end face, and the end part, corresponding to the rotating shaft, in each rotating shaft side sleeve is provided with the limiting bolt.
According to the working characteristics of the large rotary drilling rig, the invention carries out improved design aiming at solving the problems of the conventional rotary drilling bit, and the advantages of the rotary drilling bit are embodied in the following aspects: 1. the arrangement of a plurality of cutting toothed plate reinforcing ribs effectively improves the strength and the working reliability of the cutting toothed plate; the angle between the cutting toothed plate and the cutting disc is reduced, and the stress of the cutting teeth is relatively reduced; the cutting disc is provided with the muck inlet slot, so that the efficiency of muck entering and exiting the cylinder is improved, and repeated drilling is avoided; 2. the inclined inner lining plate and the inclined outer lining plate are arranged at the position where the rotary shaft sleeve is arranged on the cylinder body, so that on one hand, the connection strength of the cylinder body and the chassis is improved by the two layers of lining plates, and on the other hand, the inclined lining plates and the rotary shaft side sleeve are designed to be in inclined connection, so that the stress state is changed, and the risk of tearing of a connection welding line is reduced; 3. the double opening and closing mechanism can ensure the construction safety and the chassis opening and closing stability; each limit structure of the opening and closing device can accurately control the action displacement of the opening and closing hook and the opening and closing movement mechanism, so that the working accuracy is improved; 4. the reinforced design of the reinforcing rib plate structures of the cylinder body, the chassis and the upper disc improves the rigidity and the wear resistance of the cylinder body, the upper disc and the chassis, and meets the requirement of large load capacity.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of the cutting disk coupled to the base plate;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic view of the construction of a cutting disk;
FIG. 7 is a view in the direction C of FIG. 6;
FIG. 8 is a view from the direction B of FIG. 6;
figure 9 is a schematic diagram of the angle of inclination of the cutting tooth plate relative to the cutting disc;
FIG. 10 is a schematic view of the structure of the opening and closing device;
FIG. 11 is a schematic structural view of the opening and closing mechanism;
FIG. 12 is a view in the direction D of FIG. 1;
FIG. 13 is a cross-sectional view (partial) of FIG. 12 taken along line E-E;
FIG. 14 is a sectional view showing a connection relationship between the rotary shaft, the sleeve and the rotary shaft side sleeve;
FIG. 15 is a schematic view of the construction of the outer liner;
fig. 16 is a schematic view of the structure of the inner liner plate.
The reference numbers in the figures are: 1. a square head; 2. a power head limiting rod; 3. an upper plate rib plate; 4. hanging the plate; 4-1, angle reinforcing plates, 4-2, upper disc pressure-bearing rib plates, 5 and wear-resistant strips; 6. a barrel; 6-1, cylinder wall holes; 7. a cutting disk; 8. gauge protection teeth; 9. a support plate; 10. an upper opening and closing rod spring; 11. a crash cap; 12. an upper limiting plate; 13. a chassis; 14. a torque transmission block; 15. a chassis reinforcing box body; 16. a central shaft; 17. cutting a toothed plate; 18. cutting teeth; 19. a central shaft sleeve; 20. cutting a disk stiffener; 21. a central shaft sleeve; 22. a central cutting tooth; 23. cutting a toothed plate reinforcing rib; 24. a muck inlet slot; 25. an upper opening and closing rod; 26. a folding connecting rod; 27. a balance limiting block; 28. a lower opening and closing rod; 29. a guide sleeve; 30. a movable hook base; 31. fixing the hook seat; 32. opening and closing the hook; 33. a rotating shaft; 34. an inner liner plate; 35. an outer liner; 36. rotating the shaft sleeve; 37. a rotating shaft side sleeve; 38. and a limiting bolt.
Detailed Description
Referring to fig. 1 and 2, the present invention includes a cylinder 6, a cutting disc 7, and an opening and closing device. An upper plate 4 is fixedly connected to the upper part of the cylinder, a square head 1 is fixed to the center of the upper plate, and the drilling machine is connected with the drill bit through the square head 1. The upper disc is an important part for connecting the cylinder body and bearing, four upper disc rib plates 3 which are distributed in a radial shape are welded on the top of the upper disc, and the upper disc rib plates are respectively welded with the upper disc and the square head hoop so as to improve the square head strength. Four corner reinforcing plates 4-1 which are approximately triangular are welded at the joint of the bottom surface of the upper disc and the cylinder, and the corner reinforcing plates can enhance the deformation resistance of the cylinder and the connection reliability with the upper disc; the bottom surface of the upper plate is provided with criss-cross upper plate pressure-bearing rib plates 4-2. The lower parts of two adjacent upper disc pressure-bearing rib plates are welded by rib plates to form a box body structure (not shown in the figure), so that the protective cylinder body is not easy to deform. The structure can bear huge torque generated when the square head rotates during the working of the drill bit, and lower pressure generated when the drill bit works is supported, so that the protective barrel is not deformed, and the safety of the drill bit and the working reliability are improved.
Referring to fig. 1, the lower part of the cylinder and the chassis form an openable and closable connection through a rotating shaft, and the chassis is connected with a cutting disc 7 through a central shaft. The cylinder is a reference part of the drill bit, the ultra-large-diameter rotary drill bit has very important requirements on the rigidity and the wear resistance of the cylinder, the lower part of the periphery of the cylinder is distributed with the torque transmission block 14, the upper part of the torque transmission block is welded with the edge part of the chassis, the lower part of the torque transmission block is in contact with the chassis, and the torque transmission capacity can be improved by arranging the torque transmission block. A plurality of wear strips 5 are unevenly distributed on the upper portion and the lower portion of the outer wall of the cylinder body, and the wear strips are distributed on each welding line of the outer wall of the cylinder body, so that the wear resistance of the cylinder body is improved, and accidents caused by tearing of the welding lines are prevented.
Referring to fig. 2-5, the chassis is a basic structural member for mounting the cutting disc and the load-bearing slag, and in order to improve the strength and rigidity of the chassis and the connection strength with the cutting disc, a rectangular chassis reinforcement box body 15 is arranged on the chassis, extends from the part of the chassis close to the rotating shaft to the center of the chassis in the radial direction, and consists of a chassis rib plate and a chassis cover plate, wherein the chassis rib plate is welded on the upper surface of the chassis, and the chassis cover plate is welded on the chassis rib plate. The middle part of the lower surface of the cutting disc is welded with a cutting disc reinforcing plate 20, and the cutting disc reinforcing plate can enhance the rigidity of the cutting disc, improve the bending resistance of the central shaft sleeve and prolong the service life of the central shaft sleeve. The central shaft 16 passes through the chassis reinforcing box, the chassis, the cutting disc and the cutting disc reinforcing plate to connect the cutting disc with the chassis.
Referring to fig. 6-9, the cutting disc is a rotary digging part of the drill bit, and the outline of the cutting disc is two connected fan-shaped. The central shaft passes through the cutting disc and is provided with a central bush 19 at its lower part, which central bush is connected with a central cutting tooth 22 for centering the drilling. Two cutting toothed plates 17 are distributed on both sides of the central shaft, and a row of cutting teeth 18 are distributed on each cutting toothed plate. The edge that the cutting dish is close to the cutting pinion rack is equipped with guarantor's footpath tooth 8, and guarantor's footpath tooth can be to the hole wall rule circle. For the cutting disc of the ultra-large-diameter rotary drilling bit, the cutting toothed plate needs to bear large impact load, and in order to solve the problem that the cutting toothed plate is easy to damage, the lower surface of the cutting disc is provided with a plurality of cutting toothed plate reinforcing ribs 23, the head end of each cutting toothed plate reinforcing rib is connected with the back of the cutting toothed plate, the tail end of each cutting toothed plate reinforcing rib extends towards the edge of the cutting disc body, and the height of each cutting toothed plate reinforcing rib is gradually reduced from the head end to the tail end. In the illustrated embodiment, three cutting tooth plate reinforcing ribs are provided at the back of each cutting tooth plate. The cutting toothed plate reinforcing ribs can greatly enhance the rigidity and strength of the cutting toothed plate, so that the cutting toothed plate can bear larger load in the drilling process, and the cutting toothed plate is prevented from deforming or breaking. As can be seen from fig. 9, the cutting toothed plate is obliquely arranged relative to the cutting disc, and the cutting toothed plate is obliquely arranged relative to the cutting disc body, the inclination angle of the cutting toothed plate relative to the cutting disc body is reasonably set by the invention, so that the stress of the cutting toothed plate is relatively reduced, and the inclination angle beta of the cutting toothed plate relative to the cutting disc body is 45-60 degrees. According to the invention, the upper part of the cutting disc corresponding to the cutting toothed plate is provided with the muck inlet groove 24, and the length of the muck inlet groove is 60-80% of the length of the cutting toothed plate. The dregs inlet groove can increase the dregs inlet, improve the efficiency of dregs entering and exiting the barrel, facilitate the dregs entering and exiting the barrel, and avoid repeated drilling.
Referring to fig. 1, 3, 10 and 11, the opening and closing device for opening and closing the base plate and the cutting plate of the present invention comprises two sets of opening and closing mechanisms, and a power head limiting rod 2 and an upper limiting plate 12 fixed on the upper plate. The upper limiting plate is fixed on the upper plate through two supporting plates 9, the power head limiting rod is used for preventing the power head from being pressed down excessively, and the height of the collision cap 11 in a non-pressed state is higher than that of the power head limiting rod. The two sets of opening and closing mechanisms are arranged side by side so as to improve the stability and reliability of opening and closing actions. Each opening and closing mechanism comprises an impact cap 11, an upper opening and closing rod 25, an opening and closing connecting rod 26, a lower opening and closing rod 28, a movable hook seat 30, a fixed hook seat 31 and an opening and closing hook 32. The collision cap is fixedly connected with the top of the upper opening-closing rod, the lower end of the upper opening-closing rod is hinged with the opening-closing connecting rod, one end of the opening-closing connecting rod is hinged with the lower opening-closing rod, the lower part of the lower opening-closing rod is fixedly connected with a movable hook seat, the movable hook seat is hinged with one end of the opening-closing hook, which is far away from the hook head, the middle part of the opening-closing hook is hinged with a fixed hook seat, the fixed hook seat is fixed with the barrel, and the hook head of the opening-closing hook is. The lower part of the collision cap is provided with a guide table 11-1 which is in sliding fit with the shaft hole of the upper limiting plate so as to ensure the vertical movement of the upper opening-closing rod. The diameter of the collision cap is larger than that of the guide table, the height of the guide table determines the movement stroke of the upper opening and closing rod, and excessive opening and closing hook opening caused by excessive movement is avoided. An upper opening and closing rod spring 10 is sleeved on the upper opening and closing rod, and two ends of the upper opening and closing rod spring respectively touch and press the guide table and the upper disc. When the power head presses down the collision cap, the upper opening and closing rod spring can play a role in buffering stress, and when the barrel body lower disc is closed, the upper opening and closing rod spring can play a role in resetting the upper opening and closing rod. The device is also provided with a guide sleeve 29, the guide sleeve is welded with the cylinder wall, and the lower opening-closing rod penetrates through the guide sleeve and is in sliding fit with the guide sleeve. The guide sleeve can realize motion guide to the lower opening-closing rod and the movable hook seat so as to keep the lower opening-closing rod and the movable hook seat to move vertically. One end of the opening and closing connecting rod is hinged with a balance block limiting block 27, the balance limiting block is in an inverted trapezoid shape, and the top surface of the balance block limiting block and the upper wall form an upward limit for the opening and closing movement mechanism. Compared with the prior art, the opening and closing device can ensure the construction safety of the ultra-large-diameter drill bit and the opening and closing stability of the chassis; each limit structure can accurately control the action displacement of the opening and closing hook and the opening and closing movement mechanism, and the working accuracy is improved. The working process of the opening and closing device is as follows: the chassis of the rotary drilling rig is closed in the excavation process, the cutting disc is in contact with the ground, the excavated dregs continuously enter the barrel, after the dregs are filled in the barrel, the drilling rig stops rotating, the drill bit is lifted to the position above the ground and rotates to the position where the dregs are stacked, the power head is used for pressing down the collision cap, the collision cap drives the upper opening and closing rod to move downwards, the upper opening and closing rod drives the opening and closing connecting rod to move downwards, the opening and closing connecting rod drives the lower opening and closing rod and the movable hook seat to move downwards, the movable hook seat pushes the opening and closing hook to rotate, the cutting disc and the chassis are opened, and the dregs are poured out; after the dregs are cleaned, the drill bit is lowered to close the cutting disc and the chassis, the spring of the upper opening-closing rod resets to drive the upper opening-closing rod to move upwards, the opening-closing hook is buckled with the hook of the chassis again, and the rotary drilling bit enters the hole to continue working.
Referring to fig. 12 to 16, the rotary shaft 33 of the rotary drill has the function of connecting the cylinder and the chassis, so that the chassis and the cutting disc can be opened and closed relative to the cylinder, thereby discharging the residue soil. For the rotary drilling bit with the ultra-large caliber, the connection strength and the connection structure of the rotating shaft are important problems. The connecting plate of the conventional connecting structure is vertically welded with the rotary shaft sleeve, so that the welding seam is easy to tear. The invention processes a through cylinder wall hole 6-1 at the installation position of the cylinder corresponding to the rotating shaft 33, an inner lining plate 34 and an outer lining plate 35 which are inclined relative to the cylinder wall are respectively arranged at the inner side and the outer side of the cylinder wall hole, the inner lining plate needs to be ensured not to exceed the outer diameter of a drill bit to avoid interference on the work of the drill bit, and the inclination angle a1 of the inner lining plate relative to the cylinder wall is 8-12 degrees. The outer lining plate should not exceed the periphery of the cylinder body; the inclination angle a2 of the outer lining board relative to the cylinder wall is 4-6 degrees. The upper parts of the inner lining plate and the outer lining plate are welded with the cylinder body, the outer side of the lower part of the cylinder body is welded with two rotating shaft side sleeves 37, the lower parts of the inner lining plate and the outer lining plate are welded with the rotating shaft side sleeves, a rotating shaft sleeve 36 is welded with the chassis, the rotating shaft sleeve is positioned between the two rotating shaft side sleeves, and the rotating shaft 33 passes through the rotating shaft side sleeves and the rotating shaft sleeve. According to the structure, on one hand, the double-layer plate structure of the inner lining plate and the outer lining plate improves the connection strength of the cylinder body and the side sleeve of the rotating shaft; and on the other hand, the inner lining plate and the outer lining plate are obliquely arranged, so that the risk of tearing of the welding seam of the connecting vertical plate can be reduced. The cylinder wall hole is an arc hole, the inner lining plate and the outer lining plate are both arc plates, and shaft sleeve abdicating grooves are formed in straight edges of the lower portions of the inner lining plate and the outer lining plate so as to avoid influence on rotation of the shaft sleeve when the chassis is opened and closed. The outer end of each rotating shaft side sleeve is an inclined end face. A stopper bolt 38 for restricting the axial movement of the rotary shaft is provided in each rotary shaft side sleeve.
Claims (9)
1. The utility model provides a drill bit is dug soon to super large bore, includes barrel (6), cutting dish (7) and opens and shuts the device, barrel upper portion rigid coupling hanging dish (4), hanging dish center fixed square head (1), barrel lower part and chassis (13) constitute through the rotation axis and can open and shut the connection, and the chassis is connected cutting dish (7) through the central axis, and the cutting dish is equipped with two rows of cutting pinion racks (17), and the cutting pinion rack is located the center pin both sides respectively, is equipped with cutting teeth (18) on each cutting pinion rack, its characterized in that:
a chassis reinforcing box body (15) is arranged on the chassis (13), the chassis reinforcing box body extends from the part of the chassis close to the rotating shaft to the center of the chassis in the radial direction, the chassis reinforcing box body is composed of a chassis rib plate and a chassis cover plate, the chassis rib plate is welded on the upper surface of the chassis, and the chassis cover plate is welded on the chassis rib plate; a cutting disc reinforcing plate (20) is welded in the middle of the lower surface of the cutting disc, and a central shaft (16) penetrates through the chassis, the chassis reinforcing box body, the cutting disc and the cutting disc reinforcing plate;
four radial upper disc upper rib plates (3) are welded on the top surface of the upper disc, an angle reinforcing plate (4-1) is welded at the joint of the bottom surface of the upper disc and the cylinder, and criss-cross upper disc pressure-bearing rib plates are arranged on the bottom surface of the upper disc;
the lower surface of the cutting disc is provided with a plurality of cutting toothed plate reinforcing ribs, the head ends of the cutting toothed plate reinforcing ribs (23) are connected with the back of the cutting toothed plate, and the tail ends of the cutting toothed plate reinforcing ribs extend towards the edge of the cutting disc body; the cutting toothed plate is obliquely arranged relative to the cutting disc, and the inclination angle beta is 45-60 degrees;
a muck inlet groove (24) is formed in the upper part of the cutting disc corresponding to the cutting toothed plate, and the length of the muck inlet groove is 60% -80% of that of the cutting toothed plate;
the lower part of the periphery of the cylinder body is distributed with a transmission block (14), the upper part of the transmission block is welded with the edge of the chassis, the lower part of the transmission block touches the chassis, the upper part and the lower part of the outer wall of the cylinder body are distributed with a plurality of wear-resistant strips (5), and the wear-resistant strips are positioned at the welding seams of the cylinder body.
2. The ultra-large caliber rotary drilling bit according to claim 1, characterized in that: three cutting pinion rack strengthening ribs are arranged at the back of each cutting pinion rack, and the height of each cutting pinion rack strengthening rib is decreased progressively from the head end to the tail end.
3. The ultra-large caliber rotary drilling bit according to claim 1, characterized in that: the opening and closing device comprises two sets of opening and closing mechanisms, a power head limiting rod (2) and an upper limiting plate (12), wherein the power head limiting rod and the upper limiting plate are fixed on the upper disc; the height of the impact cap in an un-pressed state is higher than that of the power head limiting rod; the opening and closing mechanism comprises a collision cap (11), an upper opening and closing rod (25), an opening and closing connecting rod (26), a lower opening and closing rod (28), a movable hook seat (30), a fixed hook seat (31) and an opening and closing hook (32), the collision cap is fixedly connected with the top of the upper opening and closing rod, the lower end of the upper opening and closing rod is hinged with the opening and closing connecting rod, one end of the opening and closing connecting rod is hinged with the lower opening and closing rod, the lower part of the lower opening and closing rod is fixedly connected with the movable hook seat, the movable hook seat is hinged with one end of the opening and closing hook, which is far away from a hook head, the middle part of the opening and closing hook is hinged with the fixed hook seat; the lower part of the collision cap is provided with a guide table (11-1), the guide table is in sliding fit with the shaft hole of the upper limiting plate, the diameter of the collision cap is larger than that of the guide table, an opening-closing rod spring (10) is sleeved on the upper opening-closing rod, and two ends of the upper opening-closing rod spring respectively touch and press the guide table and the upper disc.
4. The ultra-large caliber rotary drilling bit according to claim 3, characterized in that: the opening and closing mechanism also comprises a guide sleeve (29), the guide sleeve is welded with the cylinder wall, and the lower opening and closing rod penetrates through the guide sleeve and is in sliding fit with the guide sleeve.
5. The ultra-large caliber rotary drilling bit according to claim 4, characterized in that: one end of the opening and closing connecting rod is hinged with a balance block limiting block (27), the balance limiting block is in an inverted trapezoid shape, and the top surface of the balance block limiting block and the upper wall form an upward limit for the opening and closing movement mechanism.
6. The ultra-large caliber rotary drilling bit according to claim 1, characterized in that: the barrel is provided with a through barrel wall hole (6-1) corresponding to the installation position of the rotating shaft (33), the inner side and the outer side of the barrel wall hole are respectively provided with an inner lining plate (34) and an outer lining plate (35) which are inclined relative to the barrel wall, the upper parts of the inner lining plate and the outer lining plate are welded with the barrel, the outer side of the lower part of the barrel is welded with two rotating shaft side sleeves (37), the lower parts of the inner lining plate and the outer lining plate are welded with the rotating shaft side sleeves, a rotating shaft sleeve (36) is welded with a chassis, the rotating shaft sleeve is positioned between the two rotating shaft side sleeves, and the rotating shaft (33) penetrates.
7. The ultra-large caliber rotary drilling bit according to claim 6, characterized in that: the inclination angle a1 of the inner lining plate relative to the cylinder wall is 8-12 degrees, and the inclination angle a2 of the outer lining plate relative to the cylinder wall is 4-6 degrees.
8. The ultra-large caliber rotary drilling bit according to claim 7, characterized in that: the cylinder wall hole is an arc hole, the inner lining plate and the outer lining plate are both arc plates, and shaft sleeve abdicating grooves are formed in straight edges of the lower portions of the inner lining plate and the outer lining plate.
9. The ultra-large caliber rotary drilling bit according to claim 8, characterized in that: the outer side end of each rotating shaft side sleeve is an inclined end surface, and a limit bolt (38) is arranged in each rotating shaft side sleeve and corresponds to the end part of the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004109.4A CN112252989B (en) | 2020-09-22 | 2020-09-22 | Ultra-large-diameter rotary drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004109.4A CN112252989B (en) | 2020-09-22 | 2020-09-22 | Ultra-large-diameter rotary drilling bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112252989A true CN112252989A (en) | 2021-01-22 |
| CN112252989B CN112252989B (en) | 2022-11-01 |
Family
ID=74232912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011004109.4A Active CN112252989B (en) | 2020-09-22 | 2020-09-22 | Ultra-large-diameter rotary drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112252989B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323582A (en) * | 2021-05-26 | 2021-08-31 | 王天勇 | Square percussion drill structure, rotary excavating machine drill bit with same and application |
| CN115839218A (en) * | 2023-02-20 | 2023-03-24 | 陕西晖煌建筑劳务有限公司 | Highway construction rotary drilling device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203925295U (en) * | 2014-01-02 | 2014-11-05 | 天津市八方工程机械设备有限公司 | A kind of revolving dug drill bit |
| CN203925292U (en) * | 2014-03-18 | 2014-11-05 | 天津市八方工程机械设备有限公司 | A kind of revolving dug reaming bit |
| CN106468141A (en) * | 2015-08-18 | 2017-03-01 | 天津市八方工程机械设备有限公司 | A kind of long-spiral drilling machine reducing rotary digging drill bit |
| CN106481278A (en) * | 2015-09-02 | 2017-03-08 | 宜昌朝阳建设工程有限责任公司 | A kind of rotary digging drill bit |
| CN110644485A (en) * | 2019-09-05 | 2020-01-03 | 江苏科技大学 | Bottom-expanding rotary drilling bit capable of placing protective cylinder |
| CN210033290U (en) * | 2019-04-30 | 2020-02-07 | 武汉南方岩土工程技术有限责任公司 | Rotary drilling bit for drilling of rotary drilling bored pile |
| CN111173455A (en) * | 2020-01-21 | 2020-05-19 | 中铁四局集团建筑工程有限公司 | Needle tube type extrusion drill bit for rotary drilling rig |
-
2020
- 2020-09-22 CN CN202011004109.4A patent/CN112252989B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203925295U (en) * | 2014-01-02 | 2014-11-05 | 天津市八方工程机械设备有限公司 | A kind of revolving dug drill bit |
| CN203925292U (en) * | 2014-03-18 | 2014-11-05 | 天津市八方工程机械设备有限公司 | A kind of revolving dug reaming bit |
| CN106468141A (en) * | 2015-08-18 | 2017-03-01 | 天津市八方工程机械设备有限公司 | A kind of long-spiral drilling machine reducing rotary digging drill bit |
| CN106481278A (en) * | 2015-09-02 | 2017-03-08 | 宜昌朝阳建设工程有限责任公司 | A kind of rotary digging drill bit |
| CN210033290U (en) * | 2019-04-30 | 2020-02-07 | 武汉南方岩土工程技术有限责任公司 | Rotary drilling bit for drilling of rotary drilling bored pile |
| CN110644485A (en) * | 2019-09-05 | 2020-01-03 | 江苏科技大学 | Bottom-expanding rotary drilling bit capable of placing protective cylinder |
| CN111173455A (en) * | 2020-01-21 | 2020-05-19 | 中铁四局集团建筑工程有限公司 | Needle tube type extrusion drill bit for rotary drilling rig |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323582A (en) * | 2021-05-26 | 2021-08-31 | 王天勇 | Square percussion drill structure, rotary excavating machine drill bit with same and application |
| CN113323582B (en) * | 2021-05-26 | 2023-11-28 | 王天勇 | Square impact drill structure, rotary drilling machine drill bit with square impact drill structure and application |
| CN115839218A (en) * | 2023-02-20 | 2023-03-24 | 陕西晖煌建筑劳务有限公司 | Highway construction rotary drilling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112252989B (en) | 2022-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112252989B (en) | Ultra-large-diameter rotary drilling bit | |
| US4407376A (en) | Under-reaming pile bore excavator | |
| WO2021068557A1 (en) | Rotary drilling rig power head and corresponding rotary drilling rig | |
| CN202117556U (en) | Auger driller for moulding concrete piles with different depth and shapes | |
| CN202031080U (en) | Hole drilling, disc rotationally-expanding and hole cleaning all-in-one machine | |
| CN213898855U (en) | Rotary drilling bit for large rotary drilling rig | |
| CN114277834B (en) | Wind power single pile foundation and construction method | |
| CN112709535A (en) | Rotary drilling rig and drill bit thereof | |
| CN202227346U (en) | Construction device for full casing construction method | |
| CN109025809A (en) | More power guide position linkage combination drill tools, preparation method and pile-type | |
| CN213898854U (en) | Barrel chassis opening and closing device for ultra-large-diameter rotary drilling bit | |
| CN102155157B (en) | Spiral drilling machine for forming concrete piles of different depths and shapes | |
| CN204608862U (en) | The quiet shoveling equipment of fluid pressure type | |
| CN219638773U (en) | Auxiliary reaming device for casing pipe discharging and additionally installed with rotary drilling bit | |
| CN209228300U (en) | Link combination drill tool for more power guide positions | |
| CN208533598U (en) | Digging arm and excavating equipment | |
| CN201411308Y (en) | Self-powered up-open type fan-shaped gate skip | |
| CN107448153B (en) | Dig stake machine drilling rod soon | |
| CN217327164U (en) | Construction device for rotary digging of super-thick pebble layer | |
| CN206753495U (en) | The back taper stepped ramp type stake of CFG reducings and drilling tool | |
| CN220955442U (en) | Drilling tool for rotary-digging filling pile machine | |
| CN220955466U (en) | Rotary drilling bucket device capable of taking out soil quickly | |
| CN206801467U (en) | A kind of reaming rig | |
| CN220226717U (en) | Pile drilling and expanding integrated pile machine for club-footed pile | |
| CN108149646A (en) | Door machine integrates dam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |