CN217652672U - Drill bit of reverse circulation drilling machine - Google Patents

Abstract

The utility model discloses a reverse circulation drill bit, which comprises an excavating head, wherein the excavating head is provided with a rotary rod for driving the excavating head to rotate, a muck collecting barrel is arranged above the excavating head, and the rotational sleeve of the muck collecting barrel is sleeved on the rotary rod and is coaxially arranged with the rotary rod; a blocking plate is fixedly arranged at a position close to the top end in the residue soil collecting barrel, the blocking plate is sleeved outside the rotating rod, a plurality of uniformly distributed filtering holes are formed in the blocking plate, and the filtering holes are of a funnel-shaped structure; the rotating rod is fixedly provided with a shifting plate, and the shifting plate is positioned below the blocking plate and is not limited to be close to the blocking plate; according to the scheme, the blocking plate is arranged in the residue soil collecting cylinder, the residue soil collecting cylinder is divided into two parts, the blocking plate is provided with the filtering hole, and crushed stone and muddy water in the residue soil collecting cylinder are separated and filtered; simultaneously, the shifting plate is arranged on the rotary rod, so that broken stones in the residue soil collecting barrel are shifted, the broken stones are prevented from plugging the filter holes, and slurry can be quickly discharged through the rotary rod.

Description

Drill bit of reverse circulation drilling machine

Technical Field

The utility model relates to a rig drill bit technical field, concretely relates to reverse circulation rig drill bit.

Background

The reverse circulation drilling machine is a common pile foundation drilling construction device, the working principle of the reverse circulation drilling machine is that a drilling machine rotating device drives a drill rod and a drill bit to rotate to crush rock soil, then a reverse circulation deslagging mode is utilized, namely, during drilling, mud passes through a well head from a mud pit and enters a well bottom in a self-retained mode, then rock debris is carried by the mud, the mud returns to the well head through the hollow part of the drill rod, and is discharged to the mud pit through a water tap and a slag discharge pipe, sediment is precipitated and then flows into the well for circulation again, and the drill bit is an important part of the reverse circulation drilling machine.

In the construction of highway bridge and culvert pile foundations, the reverse circulation drilling bored concrete pile is an important technology for the construction of modern highway bridge pile foundations, and belongs to the construction technology of the bored concrete pile.

In the prior art, slurry is continuously pumped out of the bottom of a hole from the center of a drill rod by a slurry pump, so that the slurry generates continuous descending flow velocity outside the drill rod in the hole, and particles such as sand and stone generated by drilling are taken out; the traditional drill bit is simple in structure, when slurry is discharged, the water outlets on the drill bit and the rotary rod are easily blocked by the slag and the crushed stone, so that the slurry cannot be rapidly discharged, and the drilling construction progress and the drilling quality are influenced; and, traditional drill bit can only grind the big particle diameter drilling mud into the tiny particle, can't directly collect great dregs rubble, and drilling efficiency in this regard is low, and is big to the drill bit friction loss, has slowed down the construction progress, reduces the life of device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the above-mentioned problem among the prior art, provide a reverse circulation rig drill bit.

The technical scheme of the utility model is that:

a reverse circulation drill bit comprises an excavating head, wherein a rotary rod for driving the excavating head to rotate is mounted on the excavating head, and the reverse circulation drill bit is characterized in that a muck collecting barrel is arranged above the excavating head, is rotatably sleeved on the rotary rod and is coaxially arranged with the rotary rod; a blocking plate is fixedly arranged at a position close to the top end inside the muck collecting barrel, the blocking plate is sleeved outside the rotary rod, a plurality of uniformly distributed filtering holes are formed in the blocking plate, and the filtering holes are of a funnel-shaped structure; the rotating rod is fixedly provided with a shifting plate, and the shifting plate is located below the blocking plate and is not limited to be close to the blocking plate.

Preferably, a plurality of steel ropes which are uniformly distributed are arranged in the residue soil collecting cylinder close to the opening at the bottom end, one end of each steel rope is fixed on the inner wall of the residue soil collecting cylinder, and the other end of each steel rope penetrates through a limiting lantern ring arranged in the residue soil collecting cylinder and then is installed in the cylinder wall of the residue soil collecting cylinder; the limiting lantern ring is sleeved on the rotating rod and rotates relative to the rotating rod.

Preferably, the inside of the rotating rod is of a hollow structure, a water inlet penetrating through the rotating rod is formed in the outer wall of the rotating rod, the water inlet is located above the blocking plate, and the shape and size of the water inlet are consistent with those of the small port of the filtering hole.

Preferably, a second bearing is fixedly mounted on the limiting lantern ring, and the second bearing is sleeved on the rotating rod; the limiting lantern ring is provided with steel rope mounting holes which are uniformly distributed, and the steel ropes penetrate through the steel rope mounting holes.

Preferably, the wall of the slag collecting barrel is provided with a vertically arranged screw rod mounting hole, and the top end of the screw rod mounting hole penetrates through the top surface of the slag collecting barrel; and a stop block is fixed at the bottom of the screw rod mounting hole, and the end part of the steel rope penetrates through the inner wall of the residue soil collecting barrel, extends into the screw rod mounting hole and is overlapped on the top end surface of the stop block.

Preferably, a fastening screw for pressing the steel cable is installed in the screw installation hole, and the bottom end of the fastening screw is in contact with the steel cable.

The utility model has the advantages that:

the utility model provides a reverse circulation drill bit, through installing the dregs collector cylinder on the rotary rod, accomodate great dregs rubble to set up the baffler in the dregs collector cylinder, separate into two parts to the dregs collector cylinder, and through seting up the filtration pore on the baffler, separate the filtration to rubble and muddy water in the dregs collector cylinder; meanwhile, a shifting plate is fixedly arranged on the rotary rod to shift the broken stones in the muck collecting barrel, so that the filtering holes are prevented from being blocked by the broken stones, and the slurry can be quickly discharged through the rotary rod;

through set up a plurality of steel cables that are circumference evenly distributed in the dregs collecting vessel, the network structure that forms at the opening part of dregs collecting vessel, the dregs rubble of being convenient for on the one hand enters into the dregs collecting vessel through the extrusion force, and on the other hand blocks the dregs rubble that enters into in the dregs collecting vessel, prevents that it from falling back to the well drilling, causes the influence to the cutting head.

Drawings

FIG. 1 is a schematic view of a first construction of a reverse circulation drill bit according to the present invention;

FIG. 2 is a second schematic structural view of the drill bit of the reverse circulation drilling machine

FIG. 3 is a schematic view of a third structure of a reverse circulation drill bit provided by the present invention;

fig. 4 is a schematic structural view of the muck collecting cylinder provided by the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 3;

FIG. 6 is an enlarged view of portion A of FIG. 3;

fig. 7 is a schematic view of the cutting head structure provided by the present invention;

in the figure, 1, a residue soil collecting cylinder; 101. a screw mounting hole; 102. a thread block; 103. a stopper; 104. a rotating rod mounting hole; 105. a first bearing; 106. a sawtooth opening; 107. a through hole;

11. a barrier plate; 111. a filtration pore;

12. a limiting lantern ring; 121. steel rope mounting holes; 122. a second bearing;

13. a steel cord;

2. opening a chisel head; 201. a support; 202. a main drill rod; 203. a drilling tool holder; 204. a blade; 205. a conical head; 206. a connector; 207. limiting slots;

3. fixing the sleeve; 301. a cavity;

4. rotating the rod; 401. a water inlet; 402. dialing a plate;

5. fastening a screw rod;

6. and (5) fixing the bolt.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention to be solved clearer, the present invention is further explained with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

It is to be understood that the terms "horizontal, vertical, top, bottom, end, side, above, below" and the like are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

As shown in fig. 1 to 7, the utility model relates to a reverse circulation drill bit, including the cutting head 2, for punching and excavating, the rotary rod 4 is installed on the cutting head 2, the rotary rod 4 is coaxial with the cutting head 2, and the rotary rod 4 is fixedly installed between the rotary plate 4 and the cutting head 2 through the fixing bolt 6, the rotary rod 4 is driven by the drill to axially rotate, and then the cutting head 2 is driven to rotate, so as to realize excavating and excavating soil; in addition, a slag collecting barrel 1 is arranged above the cutting head 2, the slag collecting barrel 1 is sleeved on a rotating rod 4, the opening of the slag collecting barrel 1 is arranged downwards, the slag collecting barrel 1 and the rotating rod 4 are coaxially arranged, a fixing sleeve 3 coaxially arranged with the slag collecting barrel 1 is installed on the top surface of the slag collecting barrel 1, the end part of the rotating rod 4 is located in a cavity 301 of the fixing sleeve 3, the fixing sleeve 3 is used for being installed and connected with a drilling machine, the effect of the fixing sleeve is that a slag collecting drill bit is positioned when the drilling machine is installed, on the other hand, the end part of the rotating rod 4 is protected, and the damage of the part of the rotating rod 4 connected with the drilling machine is avoided; by arranging the residue soil collecting cylinder 1, large-particle broken stone impurities are collected after the earth surface soil is excavated by the excavating head 2; in addition, a plurality of steel ropes 13 which are uniformly distributed are arranged in the position, close to the bottom opening end, in the muck collecting cylinder 1, one end of each steel rope 13 is fixedly welded on the inner wall of the muck collecting cylinder 1, and the other end of each steel rope 13 penetrates through a limiting lantern ring 12 arranged in the muck collecting cylinder 1 and then is installed in the cylinder wall of the muck collecting cylinder 1; the limiting lantern ring 12 is sleeved on the rotating rod 4 and can rotate relative to the rotating rod 4, and the position of the limiting lantern ring 12 in the muck collecting barrel 1 corresponds to the position of the steel rope 13, so that the steel rope 13 is in a horizontal state before passing through the limiting lantern ring 12 and after passing through the limiting lantern ring 12; through a plurality of evenly distributed's of setting steel cable 13, bottom open end at dregs collector 1 forms network structure, because steel cable 13 has certain toughness, when cutting head 2 produces great dregs rubble at the in-process of cutting excavation, pass behind the network structure that steel cable 13 formed with great dregs rubble through pressure, enter into the inside of dregs collector 1, avoid in work engineering, the dregs rubble constantly sinks, cause wearing and tearing to cutting head 2, improve cutting head 2's life and well drilling quality.

It should be noted that, as shown in fig. 2 to 4, in the specific embodiment of the present invention, a rotating rod mounting hole 104 for the rotating rod 4 to pass through is formed on the top end surface of the muck collecting cylinder 1, a first bearing 105 is disposed in the rotating rod mounting hole 104, an outer ring of the first bearing 105 is fixed on an inner wall of the rotating rod mounting hole 104, and an inner ring thereof is fixedly sleeved on the rotating rod 4, the rotating rod 4 is rotatably mounted on the muck collecting cylinder 1 by disposing the first bearing 105, and when the rotating rod 4 rotates, the muck collecting cylinder 1 can keep relatively still; in addition, a blocking plate 11 is fixedly installed at a position close to the top end in the residue soil collecting cylinder 1, the blocking plate 11 is a circular plate and completely covers the inside of the residue soil collecting cylinder 1, and the inside of the residue soil collecting cylinder 1 is divided into an upper area and a lower area; in addition, the blocking plate 11 is sleeved on the rotating rod 4 and is in clearance fit with the rotating rod 4, so that the rotating rod 4 and the blocking plate 11 can rotate relatively without being blocked; still set up a plurality of evenly distributed's filtration hole 111 on baffler 11, filter hole 111 and be the big funnel type structure in the little top in bottom, its effect is filtered great dregs rubble, makes the dregs rubble that enters into in dregs surge drum 1 persist in the below cavity of dregs surge drum 1, and simultaneously, the structural design who filters hole 111 and leaks hopper-shaped can effectively avoid dregs rubble card in filtering hole 111, avoids causing the influence to the filter effect.

Further, as shown in fig. 2 and fig. 3, in the embodiment of the present invention, the rotating rod 4 is provided with a strip-shaped shifting plate 402, the shifting plate 402 is horizontally disposed, and one end of the shifting plate 402 is fixedly mounted on the rotating rod 4; in addition, the other end of the shifting plate 402 is arranged close to the inner wall of the muck collecting barrel 1, and the rotating rod 4 drives the shifting plate 402 to rotate, so that the rotating area range of the shifting plate 402 can completely cover all the filtering holes 111; in addition, the shifting plate 402 is located below the blocking plate 11, the top surface of the shifting plate 402 is infinitely close to the bottom surface of the blocking plate 11, and the rotating rod 4 drives the shifting plate 402 to rotate, so that the shifting plate 402 peels off the residue soil crushed stone clamped at the port of the filtering hole 111, and the phenomenon that water flow cannot flow into the upper area of the residue soil collecting barrel 1 from the lower area of the residue soil collecting barrel 1 after the filtering hole 111 is blocked by the residue soil crushed stone is avoided.

It should be explained that, as shown in fig. 2 and fig. 3, in the embodiment of the present invention, the upper half inside the rotating rod 4 is a hollow structure, and a water inlet 401 is disposed on the outer wall of the rotating rod 4 and penetrates through the rotating rod 4, the water inlet 401 is communicated with the internal cavity of the rotating rod 4, the muddy water flows into the internal cavity of the rotating rod 4 from the water inlet 401, and the muddy water in the rotating rod 4 is pumped out by a water pump on the drilling machine; in addition, the water inlet 401 is arranged above the blocking plate 11 and in the cavity above the residue soil collecting cylinder 1 and used for discharging muddy water, and the residue soil broken stones are blocked by the blocking plate 11, so that the residue soil broken stones are prevented from entering the cavity above the residue soil collecting cylinder 1 and further blocking the water inlet 401; in addition, the shape and size of the water inlet 401 are consistent with the shape and size of the small port at the bottom of the filter hole 111, which is used for enabling the muddy water passing through the filter hole 111 to smoothly enter the internal cavity of the rotating rod 4 from the water inlet 401, thereby further avoiding the occurrence of blockage of the water inlet 401.

It should be further noted that, as shown in fig. 3 and fig. 6, in the specific embodiment of the present invention, a second bearing 122 is fixedly mounted on the position-limiting sleeve ring 12, the second bearing 122 is coaxially disposed with the position-limiting sleeve ring 12, an outer ring of the second bearing 122 is fixed on the position-limiting sleeve ring 12, an inner ring of the second bearing 122 is fixedly sleeved on the rotating rod 4, and by disposing the second bearing 122, the position-limiting sleeve ring 12 can rotate relative to the rotating rod 4 after being mounted on the rotating rod 4; in addition, a plurality of steel rope mounting holes 121 which are uniformly distributed circumferentially are formed in the limiting sleeve ring 12, the steel rope mounting holes 121 are arranged close to the edge of the limiting sleeve ring 12 and are positioned between the bearing II 122 and the edge of the limiting sleeve ring 12, and the steel ropes 13 are bent after penetrating through the steel rope mounting holes 121 by arranging the steel rope mounting holes 121 and are finally mounted in the inner wall of the muck collecting barrel 1; in addition, the number and the positions of the steel rope mounting holes 121 correspond to those of the steel ropes 13, and the steel ropes 13 can be kept in a horizontal state after penetrating through the steel rope mounting holes 121, so that the phenomenon that the steel ropes 13 are bent obliquely is avoided, the stability of the space between the steel ropes 13 is improved, and the slag and broken stones are better filtered and blocked.

It should be further explained that, as shown in fig. 4 and 5, in the embodiment of the present invention, a plurality of threaded rod mounting holes 101 are formed in the circumferential wall of the muck collecting cylinder 1, the threaded rod mounting holes 101 are uniformly distributed in the circumferential wall, the threaded rod mounting holes 101 are vertically arranged, the top end of the threaded rod mounting hole 101 penetrates through the top end of the muck collecting cylinder 1, and the bottom end of the threaded rod mounting hole 101 corresponds to the height of the position where the steel rope 13 is fixed on the inner wall of the muck collecting cylinder 1; in addition, the number and the positions of the threaded rod mounting holes 101 correspond to those of the steel ropes 13, through holes 107 corresponding to the free ends of the steel ropes 13 are formed in the inner wall of the muck collecting barrel 1, and the through holes 107 are communicated with the threaded rod mounting holes 101 and used for enabling the free ends of the steel ropes 13 to penetrate through and extend into the threaded rod mounting holes 101; in addition, a stopper 103 is fixedly installed at the bottom of the threaded rod installation hole 101, the height of the top surface of the stopper 103 corresponds to the horizontal height of the through hole 107, and the free end of the steel cable 13 is placed on the top surface of the stopper 103 after extending into the threaded rod installation hole 101.

Further, as shown in fig. 3 to 5, in the embodiment of the present invention, a fastening screw 5 is installed in the threaded rod installation hole 101, and a threaded block 102 adapted to the fastening screw 5 is fixedly disposed in the threaded rod installation hole 101, and through the mutual engagement between the fastening screw 5 and the threaded block 102, when the fastening screw 5 rotates relative to the threaded block 102, the height of the fastening screw 5 in the threaded rod installation hole 101 is adjusted; when the fastening screw 5 rotates downwards, the bottom end of the fastening screw 5 is in contact with the top surfaces of the steel rope 13 and the stop block 103, the steel rope 13 is clamped through the fastening screw 5 and the stop block 103, and the phenomenon that the steel rope 13 loosens and falls off is avoided.

Furthermore, as shown in fig. 7, in the embodiment of the present invention, the cutting head 2 includes a support 201 in an annular structure, a diameter of the support 201 is consistent with a diameter of the muck collecting cylinder 1, and the support 201 is coaxially disposed with the muck collecting cylinder 1, a main drill rod 202 is disposed at a central axis position of the support 201, the main drill rod 202 is vertically disposed, and is fixedly connected between the main drill rod 202 and the support 201 through a plurality of drill frames 203 uniformly and symmetrically distributed, the drill frames 203 are obliquely disposed, so that top ends of the drill frames 203 are fixedly connected with the support 201, bottom ends of the drill frames 203 are fixedly connected with bottom ends of the main drill rod 202, and in addition, a plurality of uniformly distributed blades 204 are fixed on the drill frames 203 for performing cutting and drilling work, and a conical head 205 is fixed on a bottom end surface of the main drill rod 202 for guiding the whole cutting head 2, thereby facilitating drilling and cutting; in addition, a connector 206 coaxial with the main drill rod 202 is fixedly installed at the top end of the main drill rod 202, the connector 206 is adapted to be inserted into the bottom of the rotary rod 4, and the connector 206 and the rotary rod 4 are coaxially arranged; seted up spacing slot 207 on the outer wall of connector 206 for with the installation of 6 adaptations of fixing bolt, after fixing bolt 6's tip ran through rotary rod 4, with the installation of the spacing slot 207 adaptations on the connector 6, and then fix the position between rotary rod 4 and the connector 206, make rotary rod 4 drive connector 206 and rotate, realize the rotation of slotting head 2.

The utility model discloses the working process and the principle of device:

the utility model provides a sediment soil collection drill bit for reverse circulation drilling machine when using, pass the free end of steel cable 13 in steel cable mounting hole 121 on the spacing lantern ring 12 earlier, wear the free end of steel cable 13 into through-hole 107 on the sediment soil collecting vessel 1 inner wall afterwards, and stretch into the free end of steel cable 13 into threaded rod mounting hole 101 in sediment soil collecting vessel 1 inner wall, make the free end of steel cable 13 place on the top surface of dog 103, rotate fastening screw 5 afterwards, make it move down in threaded rod mounting hole 101, and clamp with the free end of steel cable 13 together with baffle 103; then, a fixed sleeve 3 and a rotary rod 4 are arranged on a reverse circulation drilling machine, and an excavating head 2 is arranged at the bottom end of the rotary rod 4 through a fixed bolt 6; the reverse circulation drilling machine is started to drive the rotary rod 4 and the excavating head 2 to rotate and excavate, and large-volume broken slag in the excavating process is collected into the slag collecting cylinder 1, so that the excavating head 2 is prevented from being damaged and abraded, the service life of the excavating head 2 is prolonged, and the subsequent drilling quality is improved; and finally, after the cutting is finished, lifting the muck collecting drill bit, rotating the fastening screw 5, loosening the free end of the steel rope 13 to draw out the steel rope 13, and dumping and treating muck and crushed stone in the muck collecting cylinder 1.

The foregoing description of the specific embodiments of the present invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise form disclosed, and it is apparent that numerous changes and modifications may be made in the foregoing description, the examples having been selected and described to illustrate the specific principles and practical application of the invention, to thereby enable one skilled in the art to make and use the invention in various embodiments and with various modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (6)

1. A drill bit of a reverse circulation drilling machine comprises an excavating head (2), wherein a rotary rod (4) for driving the excavating head (2) to rotate is mounted on the excavating head (2), and the reverse circulation drilling machine is characterized in that a muck collecting barrel (1) is arranged above the excavating head (2), and the muck collecting barrel (1) is rotatably sleeved on the rotary rod (4) and is coaxially arranged with the rotary rod (4); a blocking plate (11) is fixedly installed at a position close to the top end inside the muck collecting barrel (1), the blocking plate (11) is sleeved outside the rotating rod (4), a plurality of uniformly distributed filtering holes (111) are formed in the blocking plate (11), and the filtering holes (111) are of a funnel-shaped structure; a shifting plate (402) is fixedly mounted on the rotating rod (4), and the shifting plate (402) is located below the blocking plate (11) and is not limited to be close to the blocking plate (11).

2. The drill bit of the reverse circulation drilling machine according to claim 1, characterized in that a plurality of steel ropes (13) which are uniformly distributed are arranged inside the slag soil collecting cylinder (1) and close to the opening at the bottom end, one end of each steel rope (13) is fixed on the inner wall of the slag soil collecting cylinder (1), and the other end of each steel rope (13) penetrates through a limiting sleeve ring (12) arranged in the slag soil collecting cylinder (1) and then is installed in the cylinder wall of the slag soil collecting cylinder (1); the limiting lantern ring (12) is sleeved on the rotating rod (4) and rotates relatively between the rotating rods (4).

3. The reverse circulation drill bit of the drilling machine according to claim 1, characterized in that the inside of the rotating rod (4) is a hollow structure, a water inlet (401) penetrating through the rotating rod (4) is formed on the outer wall of the rotating rod (4), the water inlet (401) is positioned above the baffle plate (11), and the shape and size of the water inlet (401) are consistent with the shape and size of the small port of the filtering hole (111).

4. A reverse circulation drill bit according to claim 2, characterized in that a second bearing (122) is fixedly mounted on the limiting collar (12), and the second bearing (122) is sleeved on the rotating rod (4); the limiting sleeve ring (12) is provided with steel rope mounting holes (121) which are evenly distributed, and the steel ropes (13) penetrate through the steel rope mounting holes (121).

5. The drill bit of the reverse circulation drilling machine according to claim 2, characterized in that a vertically arranged screw rod mounting hole (101) is formed in the wall of the slag collecting cylinder (1), and the top end of the screw rod mounting hole (101) penetrates through the top surface of the slag collecting cylinder (1); a stop block (103) is fixed at the bottom of the screw mounting hole (101), and the end part of the steel rope (13) penetrates through the inner wall of the residue soil collecting cylinder (1), extends into the screw mounting hole (101), and is overlapped on the top end face of the stop block (103).

6. A drill bit of a reverse circulation drill according to claim 5, characterized in that a fastening screw (5) for pressing said steel cord (13) is installed in said screw installation hole (101), and the bottom end of said fastening screw (5) is in contact with said steel cord (13).

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