CN213573944U

CN213573944U - Novel telescopic drill rod for down-the-hole drill

Info

Publication number: CN213573944U
Application number: CN202022566550.3U
Authority: CN
Inventors: 王龙; 佟晓亮; 朱家麒; 耿天志; 毕聪; 何晓超
Original assignee: Sinohydro Foundation Engineering Co Ltd
Current assignee: Sinohydro Foundation Engineering Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-29
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses a novel flexible drilling rod is used to down-the-hole drill, including the drill bit, drilling rod body and drill rod joint, the drilling rod body includes outer dead lever and interior movable rod, driving motor is installed at the work cavity top of outer dead lever, install adjusting screw on driving motor's the output shaft, the inside processing of interior movable rod has the internal thread groove, the internal thread inslot is installed to the adjusting screw spiro union, damper is installed to the lower extreme of interior movable rod, damper includes the upper fixed plate, the bottom plate, a damper, go up uide bushing and lower uide bushing, go up the uide bushing and install the buffer beam down, be provided with several rings of silicon columns on the inner wall of a damper, all install the conductive coil on the every silicon column, install the magnet corresponding with the silicon column on the rod cover of buffer beam, the lower extreme at the buffer beam is installed through stop gear to the drill bit connecting axle. The device has the advantages of reasonable structure, simple and convenient adjustment, long service life, good part interchangeability and high reliability.

Description

Novel telescopic drill rod for down-the-hole drill

Technical Field

The utility model relates to a down-the-hole drill technical field, concretely relates to down-the-hole drill is with novel flexible drilling rod.

Background

The down-the-hole drill is an impact rotary drill, the internal structure of which is different from that of a common rock drill, the gas distribution and piston reciprocating mechanisms of which are independent, the front end of which is directly connected with a drill bit and the rear end of which is connected with a drill rod. When drilling, the impactor is submerged into the hole, and the piston in the impactor reciprocates to strike the drill bit shank through the air distribution device, so that the drill bit impacts the hole bottom rock. The high-speed rotation of the impactor in the hole is realized by a single rotating mechanism, namely an electric motor or a pneumatic rotating device outside the hole through a drill rod connected to the rear end of the impactor. The drill rod of the drilling machine plays a role in lifting weight in the process of drilling, the torque of the drilling machine is transmitted to the drill bit to realize drilling, and the drill rod bears very complex load and almost simultaneously bears the stress of pulling, pressing, twisting, bending and the like in the drilling process. Therefore, the drill rod is critical to the drilling work. In the prior art, the drilling rod is mostly telescopic structure, but current telescopic drilling rod structure is comparatively complicated, has following not enough in the in-process of use: firstly, the adjustment of the drill rod is manual adjustment, the adjustment is complicated, the adjustment length of the telescopic drill rod is limited, and the adaptability is not strong; secondly, the existing drill rod can generate great vibration up and down in the drilling process, the drill rod does not have the shock absorption capacity, and the drill rod can be broken and twisted in the using process, so that the service life of the drill rod is greatly reduced; thirdly, the existing drill rod and the drill bit are basically in threaded connection, so that the drill rod and the drill bit are convenient to disassemble, assemble and replace, but the situations that the connection strength is not enough and the drill bit is easy to loosen exist in the using process. Therefore, it is an objective need to develop a novel telescopic drill rod for a down-the-hole drill with reasonable structure, simple and convenient adjustment, long service life, good part interchangeability and high reliability.

Disclosure of Invention

An object of the utility model is to provide a novel flexible drilling rod for down-the-hole drill that rational in infrastructure, adjust simple and convenient, long service life, part interchangeability are good, the reliability is high.

The utility model aims to realize the purpose, which comprises a drill bit, a drill rod body and a drill rod joint, wherein the drill rod body comprises an outer fixed rod and an inner movable rod, the drill rod joint is arranged at the top of the outer fixed rod, a working cavity is processed inside the outer fixed rod along the vertical direction of the outer fixed rod, a driving motor is arranged at the top of the working cavity, an adjusting screw is arranged on an output shaft of the driving motor, the inner movable rod is movably arranged in the working cavity, an inner thread groove is processed inside the inner movable rod along the vertical direction of the inner movable rod, the adjusting screw is screwed and arranged in the inner thread groove, a damping mechanism is arranged after the lower end of the inner movable rod extends out of the working cavity, the damping mechanism comprises an upper fixed plate, a lower fixed plate and a damping cylinder, the upper fixed plate is arranged at the top of the damping cylinder through screws, the, the coaxial uide bushing and the lower uide bushing of being provided with in the surge drum, go up uide bushing fixed mounting on the fixed plate, uide bushing fixed mounting is on the bottom plate down, movable mounting has the buffer beam between last uide bushing and the lower uide bushing, install buffer spring between the upper end of buffer beam and the fixed plate, the lower extreme of buffer beam is worn out to be located the below of bottom plate behind the bottom plate, the equipartition is provided with several rings of silicon post about the inner wall of surge drum, every ring of silicon post quantity is 3 at least, all install the conductive coil on the every silicon post, and install the rod cover on the buffer beam who lies in the surge drum, install the magnet corresponding with the silicon post on the rod cover, the connecting axle is installed to the upper end of drill bit, the lower extreme at the buffer beam is installed through stop gear in the upper end.

Further, stop gear includes pull rod and pull ring, and the inside vertical processing of lower extreme of buffer rod has the slot, and the symmetry is provided with spacing hole on the buffer rod of slot both sides, and the upper portion of connecting axle transversely runs through the processing and has the mounting hole, and the connecting axle cartridge is in the slot, and the mounting hole is corresponding with spacing hole position, and the pull rod cartridge is in spacing downthehole, and the stopper is installed to the one end of pull rod, installs the gag lever post that inserts in the mounting hole on the stopper, the other end of pull rod be located the buffer rod outside and with pull ring fixed connection, preferably, the diameter of gag lever post is less than the aperture of mounting hole, the diameter of stopper is greater than the aperture of mounting. And a return spring is arranged on the pull rod, one end of the return spring is fixedly connected with the limiting block, and the other end of the return spring is fixedly connected with the hole bottom of the limiting hole.

Furthermore, a plurality of groups of auxiliary springs are uniformly arranged between the upper guide sleeve and the upper end of the rod sleeve and between the lower guide sleeve and the lower end of the rod sleeve.

Only, the end plate is installed to the lower extreme of outer fixed rod, processes on the end plate to have the through-hole with the work cavity intercommunication, installs wear ring in the through-hole, and the outer wall and the wear ring sliding fit of interior movable rod.

Further, a guide groove is vertically processed in a working cavity outside the inner movable rod, a plurality of guide rods are uniformly distributed in the guide groove, a sliding plate is arranged on the outer wall of the upper portion of the inner movable rod, and the sliding plate is slidably mounted on the guide rods and is in sliding fit with the guide rods.

Compared with the prior art, the utility model has the advantages of: firstly, adjusting screw and interior movable rod adopt threaded connection's mode, only need control driving motor corotation or reversal, through adjusting screw and interior movable rod threaded connection's interact. The inner movable rod can ascend or descend in the working cavity by adjusting the forward rotation or the reverse rotation of the screw rod, so that the length of the drill rod body can be adjusted, the requirements of the drill rod bodies with different lengths can be met, and the adaptability of the drill rod is improved; secondly, the end part of the drill rod is provided with a damping mechanism which can greatly slow down the vertical vibration generated by the upper drill rod body and the lower drill rod body in the drilling process, so that the phenomena of distortion and breakage of the drill rod bodies are avoided, and the service life of the drill rod bodies can be greatly prolonged; thirdly, the traditional connection mode of the drill bit and the drill rod body is changed, the connection strength between the drill rod body and the drill bit can be ensured under the condition that the drill rod body and the drill bit are convenient to disassemble and replace, and the phenomenon that the drill bit is loosened in the drilling process is avoided. The utility model has the advantages of reasonable structure, simple and convenient adjustment, long service life, good part interchangeability and high reliability, and is easy to popularize and use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a connection structure of the damping mechanism 4, the limiting mechanism 2 and the drill bit 1;

in the figure, 1-a drill bit, 2-a limiting mechanism, 21-a limiting hole, 22-a pull ring, 23-a pull rod, 24-a limiting block, 25-a reset spring, 26-a limiting rod, 27-a mounting hole, 3-a connecting shaft, 4-a damping mechanism, 41-a lower fixed plate, 42-a damping cylinder, 43-a silicon column, 44-a conductive coil, 45-an upper guide sleeve, 46-an upper fixed plate, 47-a buffer spring, 48-a buffer rod, 49-a magnet, 410-a rod sleeve, 411-a lower guide sleeve, 412-an auxiliary spring, 5-an inner thread groove, 6-an outer fixed rod, 7-an inner movable rod, 8-an adjusting screw rod, 9-a guide rod, 10-a guide groove, 11-a sliding plate and 12-a driving motor, 13-drill pipe joint, 14-end plate.

Detailed Description

The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.

As shown in fig. 1-2, the utility model comprises a drill bit 1, a drill rod body and a drill rod joint 13, wherein the drill rod body comprises an outer fixed rod 6 and an inner movable rod 7, the drill rod joint 13 is arranged at the top of the outer fixed rod 6, a working cavity is processed inside the outer fixed rod 6 along the vertical direction of the outer fixed rod 6, a driving motor 12 is installed at the top of the working cavity, the driving motor 12 is the prior art, a positive and negative motor is selected as the driving motor 12, an adjusting screw 8 is installed on an output shaft of the driving motor 12, the inner movable rod 7 is movably installed in the working cavity, an inner thread groove 5 is processed inside the inner movable rod 7 along the vertical direction of the inner movable rod 7, the adjusting screw 8 is installed in the inner thread groove 5 in a threaded manner, a damping mechanism 4 is installed after the lower end of the inner movable rod 7 extends out of the working cavity, the damping mechanism 4 comprises an upper fixing plate 46, a lower fixing plate 41 and a damping cylinder 42, wherein the upper fixing plate 46 is mounted at the top of the damping cylinder 42 through screws, the lower fixing plate 41 is mounted at the bottom of the damping cylinder 42 through screws, an upper guide sleeve 45 and a lower guide sleeve 411 are coaxially arranged in the damping cylinder 42, the upper guide sleeve 45 is fixedly mounted on the upper fixing plate 46, the lower guide sleeve 411 is fixedly mounted on the lower fixing plate 41, a buffer rod 48 is movably mounted between the upper guide sleeve 45 and the lower guide sleeve 411, a buffer spring 47 is mounted between the upper end of the buffer rod 48 and the upper fixing plate 46, the lower end of the buffer rod 48 penetrates through the lower fixing plate 41 and is located below the lower fixing plate 41, a plurality of circles of silicon columns 43 are uniformly distributed on the inner wall of the damping cylinder 42 up and down, the number of silicon columns 43 in each circle is at least 3, and each silicon column 43 is provided with a conductive coil, and a rod sleeve 410 is arranged on the buffer rod 48 positioned in the shock absorption cylinder 42, a magnet 49 corresponding to the silicon column 43 is arranged on the rod sleeve 410, the upper end of the drill bit 1 is provided with a connecting shaft 3, and the upper end of the connecting shaft 3 is arranged at the lower end of the buffer rod 48 through a limiting mechanism 2.

When in use, after the drill rod joint 13 is connected with a drilling machine, the driving motor 12 is started, the driving motor 12 only needs to be controlled to rotate forwards or reversely, the inner movable rod 7 can ascend or descend in the working cavity by the interaction of the threaded connection of the adjusting screw rod 8 and the inner movable rod 7 and the forward rotation or reverse rotation of the adjusting screw rod 8, so that the length of the drill rod body can be adjusted, the drilling machine can be controlled to drill holes after the length of the drill rod body is adjusted, the drill bit 1 can generate larger vibration during drilling, the vibration generated by the drill bit 1 can be transmitted to the buffer rod 48, at the moment, part of the vibration of the drill rod body can be counteracted under the action of the buffer spring 47, meanwhile, the magnet 49 synchronously vibrates under the action of the buffer rod 48, and in the moving process of the magnet 49, the generated magnetic field can cut the lead coil 44, the current is generated in the conductive coil 44, so that a magnetic field which hinders the buffer rod 48 from moving up and down is generated in the conductive coil 44, the vibration of the buffer rod 48 is further reduced, the phenomena of twisting and breaking of the drill rod body are avoided, and the service life of the drill rod can be greatly prolonged.

Further, the limiting mechanism 2 comprises a pull rod 23 and a pull ring 22, a slot is vertically processed in the lower end of the buffer rod 48, limiting holes 21 are symmetrically arranged on the buffer rod 48 at two sides of the slot, a mounting hole 27 is transversely processed on the upper portion of the connecting shaft 3 in a penetrating manner, the connecting shaft 3 is inserted in the slot, the mounting hole 27 corresponds to the limiting hole 21, the pull rod 23 is inserted in the limiting hole 21, a limiting block 24 is installed at one end of the pull rod 23, a limiting rod 26 inserted in the mounting hole 27 is installed on the limiting block 24, the other end of the pull rod 23 is located on the outer side of the buffer rod 48 and is fixedly connected with the pull ring 22, the limiting mechanism 2 changes the traditional connection mode of the drill bit 1 and the drill rod body, and can ensure the connection strength between the drill rod body and the drill bit 1 under the condition that the drill rod body and the drill bit 1 can be detached and replaced, the phenomenon that the drill bit 1 is loosened in the drilling process is avoided, when the drill bits 1 of different specifications need to be replaced, the pull ring 22 is pulled at the same time, the limiting rod 26 is pulled out of the mounting hole 27, at the moment, the connecting shaft 3 is separated from the slot, then after the drill bits 1 of other specifications are replaced, the connecting shaft 3 is inserted into the slot again, after the mounting hole 27 is aligned with the limiting hole 21, the pull ring 22 is loosened, the limiting rod 26 is inserted into the mounting hole 27, the connecting shaft 3 can be fixed on the buffer rod 48, the adjustment and the use are convenient, in order to ensure the connection stability of the connecting shaft 3 and the buffer rod 48, preferably, the diameter of the limiting rod 26 is smaller than the aperture of the mounting hole 27, the diameter of the limiting block 24 is larger than the aperture of the mounting hole 27, in addition, in order to enable the limiting block 24 to be tightly attached to the joint of the mounting hole 27 and the limiting hole 21, the reset spring, one end of the return spring 25 is fixedly connected with the limiting block 24, and the other end of the return spring is fixedly connected with the bottom of the limiting hole 21.

Furthermore, a plurality of groups of auxiliary springs 412 are uniformly arranged between the upper guide sleeve 45 and the upper end of the rod sleeve 410 and between the lower guide sleeve 411 and the lower end of the rod sleeve 410, the auxiliary springs 412 have a certain vibration reduction function, and the auxiliary springs 412 can absorb the vibration of the buffer rod 48 to effectively protect the drill rod body and the drill bit 1.

Further, in order to avoid dust in the drilling process from entering the working cavity, the lower end of the outer fixing rod 6 is provided with an end plate 14, a through hole communicated with the working cavity is formed in the end plate 14, the end plate 14 can prevent dust from entering the working cavity, a wear-resistant ring is installed in the through hole, and the outer wall of the inner movable rod 7 is in sliding fit with the wear-resistant ring.

Further, vertical processing has guide way 10 in the work cavity in the interior movable rod 7 outside, many guide bars 9 are installed to the equipartition in the guide way 10, be provided with slide 11 on the outer wall on interior movable rod 7 upper portion, slide 11 slidable mounting on guide bar 9 and with guide bar 9 sliding fit, the slide 11 and the guide bar 9 of setting can play the effect of direction at the in-process that rises or descends to interior movable rod 7, let interior movable rod 7 can both keep rectilinear movement all the time.

Claims

1. The utility model provides a novel flexible drilling rod is used to down-the-hole drill, includes drill bit (1), drilling rod body and tool joint (13), its characterized in that:

the drilling rod body includes outer dead lever (6) and interior movable rod (7), drilling rod joint (13) set up the top of outer dead lever (6), the inside of outer dead lever (6) is processed along the vertical direction of outer dead lever (6) and is had the work cavity, driving motor (12) are installed at the top of work cavity, install adjusting screw (8) on the output shaft of driving motor (12), interior movable rod (7) movable mounting is in the work cavity, the inside of interior movable rod (7) is processed female thread groove (5) in the vertical direction along interior movable rod (7), in female thread groove (5) are installed in adjusting screw (8) spiro union, install damper (4) after the lower extreme of interior movable rod (7) stretches out the work cavity, damper (4) include upper fixed plate (46), The damping cylinder comprises a lower fixing plate (41) and a damping cylinder (42), wherein the upper fixing plate (46) is installed at the top of the damping cylinder (42) through screws, the lower fixing plate (41) is installed at the bottom of the damping cylinder (42) through screws, an upper guide sleeve (45) and a lower guide sleeve (411) are coaxially arranged in the damping cylinder (42), the upper guide sleeve (45) is fixedly installed on the upper fixing plate (46), the lower guide sleeve (411) is fixedly installed on the lower fixing plate (41), a buffer rod (48) is movably installed between the upper guide sleeve (45) and the lower guide sleeve (411), a buffer spring (47) is installed between the upper end of the buffer rod (48) and the upper fixing plate (46), the lower end of the buffer rod (48) penetrates out of the lower fixing plate (41) and then is located below the lower fixing plate (41), a plurality of rings of silicon columns (43) are uniformly distributed on the inner wall of the damping cylinder (42) from top to bottom, every silicon post (43) quantity of circle is 3 at least, all installs conductive coil (44) on every silicon post (43), and installs rod cover (410) on buffer rod (48) that lie in damper cylinder (42), install magnet (49) corresponding with silicon post (43) on rod cover (410), connecting axle (3) are installed to the upper end of drill bit (1), the lower extreme at buffer rod (48) is installed through stop gear (2) in the upper end of connecting axle (3).

2. The novel telescopic drill rod for the down-the-hole drill according to claim 1, characterized in that: stop gear (2) are including pull rod (23) and pull ring (22), the inside vertical processing of lower extreme of buffer lever (48) has the slot, the symmetry is provided with spacing hole (21) on buffer lever (48) of slot both sides, the upper portion of connecting axle (3) transversely runs through the processing and has mounting hole (27), connecting axle (3) cartridge is in the slot, and mounting hole (27) and spacing hole (21) position are corresponding, pull rod (23) cartridge is in spacing hole (21), stopper (24) are installed to the one end of pull rod (23), install gag lever post (26) that insert in mounting hole (27) on stopper (24), the other end of pull rod (23) be located the buffer lever (48) outside and with pull ring (22) fixed connection.

3. The novel telescopic drill rod for the down-the-hole drill according to claim 2, characterized in that: the diameter of the limiting rod (26) is smaller than the aperture of the mounting hole (27), and the diameter of the limiting block (24) is larger than the aperture of the mounting hole (27).

4. The novel telescopic drill rod for the down-the-hole drill according to claim 2, characterized in that: and a return spring (25) is installed on the pull rod (23), one end of the return spring (25) is fixedly connected with the limiting block (24), and the other end of the return spring is fixedly connected with the bottom of the limiting hole (21).

5. The novel telescopic drill rod for the down-the-hole drill according to claim 1, characterized in that: a plurality of groups of auxiliary springs (412) are uniformly arranged between the upper guide sleeve (45) and the upper end of the rod sleeve (410) and between the lower guide sleeve (411) and the lower end of the rod sleeve (410).

6. The novel telescopic drill rod for the down-the-hole drill according to claim 1, characterized in that: the lower extreme of outer dead lever (6) is installed end plate (14), processing has the through-hole with the work cavity intercommunication on end plate (14), install wear-resisting ring in the through-hole, the outer wall and the wear-resisting ring sliding fit of interior movable rod (7).

7. The novel telescopic drill rod for the down-the-hole drill according to claim 1, characterized in that: vertical processing has guide way (10) in the work cavity in interior movable rod (7) outside, many guide bars (9) are installed to the equipartition in guide way (10), be provided with slide (11) on the outer wall on interior movable rod (7) upper portion, slide (11) slidable mounting on guide bar (9) and with guide bar (9) sliding fit.