CN212337206U - Double-cylinder loose-leaf clamping self-locking type cutting tooth coring drill cylinder - Google Patents

Abstract

The utility model provides a double-cylinder loose-leaf card is got from locking-type pick core drill section of thick bamboo, rotate loose-leaf, a plurality of self-locking mechanism and the unlocking device who corresponds with each set of self-locking mechanism including urceolus, inner tube, first reset spring, a plurality of. When the inner barrel is filled with the rock blocks, the inner barrel overcomes the pressure of the first return spring and moves upwards relative to the outer barrel, the tail end of the rotary flap at the bottom of the outer barrel can be gradually opened, and the self-locking mechanism can lock the positions of the inner barrel and the rotary flap, so that the rock blocks in the inner barrel are blocked, and the rock blocks are prevented from falling from the inner barrel. The unlocking rod of the unlocking device is pressed to unlock the position of the inner cylinder and the angle of the rotary flap, and rock unloading is completed. The utility model has the advantages of being simple in structure and convenient in operation and efficient. The rotary movable blade has no influence on the rotary drilling work of the outer barrel, the drilling resistance of the drilling barrel is small, and the drilling work efficiency is high. A guide strip and a guide groove which are matched in a sliding mode are arranged between the inner barrel and the outer barrel, a guide effect is provided for the movement of the inner barrel, and the inner barrel can be prevented from rotating circumferentially relative to the outer barrel.

Description

Double-cylinder loose-leaf clamping self-locking type cutting tooth coring drill cylinder

Technical Field

The utility model relates to a dig the drilling tool soon of rig soon, especially a double-cylinder loose leaf card is got from locking-type pick core and is bored a section of thick bamboo.

Background

The cutting tooth core-taking drill cylinder is a rotary drilling tool with more use, and is mainly used for drilling a hard rock body or a mixed soil layer with the hard rock body, and the cutting tooth core-taking drill cylinder is mainly used for cutting the rock body in the rotary drilling process and extracting the cut rock mass into a drill hole. When the cutting tooth core-taking drill barrel works, the pressure and the torque are transmitted to the drill barrel by the drill rod, the cutting tooth at the bottom of the drill barrel cuts a rock mass, the cut rock mass is continuously accumulated in the drill barrel along with the increase of the drilling depth, when the drill barrel is full of the broken rock mass and is tightly extruded, the drill barrel is lifted out of a drill hole, and after the drill barrel is lifted out, the drill rod of the drilling machine is rotated forwards and backwards to throw the broken rock mass out of the drill barrel for the next construction.

The existing cutting tooth core drilling barrel is of a single-wall barrel type structure, a cutting tooth at the bottom of the cutting tooth core drilling barrel can efficiently cut a rock body, but a drill hole cannot be thoroughly extracted from the rock body stored in the drilling barrel, and the existing cutting tooth core drilling barrel is mainly characterized in that a rock block clamping device is not arranged, so that compacted rock blocks fall off when the drilling barrel is filled with the rock block clamping device, and the coring efficiency is seriously influenced. In addition, when the drill barrel is thrown by the drilling machine in the process of unloading the rock mass outside the hole, broken rocks in the drill barrel easily impact the inner wall of the drill barrel, so that the construction environment is influenced by large and long-time noise.

The existing rotary drilling rig is generally only provided with a soil retaining mechanism at the bottom of a common drilling bucket special for a soft clay layer, for example, Chinese patent 201910653190.X discloses a rotary drilling rig, in the scheme, a drill bit door capable of being opened in a turnover mode is arranged at an opening at the bottom of the drilling bucket, a turnover device is also connected with a driving oil cylinder, the structure is complex, the operation steps are multiple, and the construction efficiency is not improved. In addition, chinese patent 201220354155.1 discloses a split-blade drill with a retaining mechanism, and this scheme changes the bucket tooth into a pick for the drilling of hard rock mass, and has increased the baffle mechanism for retaining soil at the opening of the drill bit bottom, and this baffle mechanism can retain soil, but can increase the resistance in the drilling process, and because its baffle has the effect of stopping up and down bidirectionally, the difficult entering of bold hard rock mass is in the drill bucket. Therefore, there is a need in the art for a drilling tool suitable for cutting hard rock mass, having simple structure, convenient operation and high efficiency, to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-cylinder loose-leaf card is got from locking-type pick core drill section of thick bamboo to solve the problem that proposes among the background art.

The utility model provides a double-cylinder loose-leaf card is got from locking-type pick core drill section of thick bamboo, includes urceolus, inner tube, first reset spring, a plurality of rotate loose-leaf, a plurality of set of self-locking mechanism and the unlocking device who corresponds with each set of self-locking mechanism:

the bottom of the outer cylinder is provided with cutting teeth for cutting a rock mass, the inner cylinder is arranged on the radial inner side of the outer cylinder, the inner space of the inner cylinder is used for accommodating the rock mass, and the inner cylinder can move up and down along the axial direction of the outer cylinder;

one end of the rotary flap is rotatably connected with the inner wall of the lower part of the outer barrel, a flap hole is arranged at the lower part of the inner barrel, when the inner barrel ascends relative to the outer barrel, the bottom edge of the flap hole pushes the tail end of the rotary flap to rotate upwards and gradually open and finally extend into the inner space of the inner barrel, and when the tail end of the rotary flap extends upwards into the inner space of the inner barrel, the tail end of the rotary flap can block a rock mass in the inner barrel; when the inner cylinder descends relative to the outer cylinder, under the action of the top edge of the movable leaf hole, the tail end of the rotary movable leaf rotates downwards to be gradually retracted and finally accommodated in the movable leaf hole, and when the tail end of the rotary movable leaf rotates downwards to be accommodated in the movable leaf hole, a rock mass in the inner cylinder can smoothly fall out downwards;

the first return spring is abutted between the top of the outer wall of the inner barrel and the top of the inner wall of the outer barrel and is used for abutting against the inner barrel along the axial downward direction of the outer barrel, so that the tail end of the rotary flap is always in a retracted state before the top of the inner wall of the inner barrel is not subjected to upward extrusion force of rocks;

the self-locking mechanism is arranged at the top of the outer barrel and comprises a self-locking rack, a rack mounting rod, a sliding fixture block and a self-locking spring, the lower end of the rack mounting rod is fixedly connected with the top wall of the inner barrel, the middle part of the rack mounting rod is arranged in a guide hole arranged at the top of the outer barrel in a penetrating manner, the rack mounting rod can move up and down relative to the outer barrel under the guide of the guide hole, the self-locking rack is arranged at the upper end of the rack mounting rod, the sliding fixture block can slide at the top of the outer barrel to be close to or away from the self-locking rack, one end of the sliding fixture block close to the self-locking rack is provided with a head matched with the tooth socket shape of the self-locking rack, one end of the sliding fixture block far away from the self-locking rack is connected with the self-locking spring, the self-locking spring pushes the sliding fixture block, the lower tooth surface is a plane, the top surface of the head part of the sliding fixture block is a plane, and the bottom surface is an inclined surface which is matched with the upper tooth surface of the self-locking rack in a sliding manner, so that the self-locking rack can move upwards under the action of upward thrust, the sliding fixture block is pushed away from the self-locking rack once when the self-locking rack moves upwards by the distance of one tooth, but the self-locking rack can be clamped by the sliding fixture block and cannot move downwards under the condition that the sliding fixture block does not interfere by external force, namely, the self-locking of the rack mounting rod and the inner cylinder is realized, and the;

when the inner barrel is filled with the rock blocks to enable the inner barrel to overcome the pressure of the first return spring and move upwards relative to the outer barrel, the self-locking rack can continuously push the sliding fixture block away from the self-locking rack through each inclined upper tooth surface sequentially arranged from top to bottom, and when the outer top wall of the inner barrel abuts against the inner top wall of the outer barrel and cannot move upwards any more, the head of the sliding fixture block is clamped in a certain tooth groove below the self-locking rack, and at the moment, the tail end of the rotating movable blade at the bottom of the outer barrel is in an open state to just block the rock blocks in the inner barrel so as to prevent the rock blocks from falling from the inner barrel;

the unlocking device is arranged at the top of the outer barrel and positioned above the sliding fixture block, the unlocking device comprises an unlocking rod capable of stretching up and down, a guide structure is arranged at the top of the sliding fixture block, the bottom of the unlocking rod is aligned with the guide structure at the top of the sliding fixture block, the unlocking rod is pressed downwards, the sliding fixture block can be moved towards the direction far away from the self-locking rack, and therefore the head of the sliding fixture block clamped in the tooth socket of the self-locking rack is separated from the tooth socket to realize unlocking of the inner barrel, namely the inner barrel can move downwards relative to the outer barrel, and the rotary flap is returned to a retracted state so as to discharge rock blocks in the inner barrel.

The rack mounting rod is provided with a blocking part which cannot penetrate through the guide hole, and after the inner cylinder descends to the position where the rotary flap is retracted, the blocking part of the rack mounting rod is blocked, so that the inner cylinder cannot descend any more.

The blocking part on the rack mounting rod can be the teeth at the lowest end of the self-locking rack on the rack mounting rod or a circle of blocking ring convexly arranged on the outer wall of the rack mounting rod.

Preferably, the guide structure at the top of the sliding clamping block is an inclined pressure-bearing surface arranged at the middle position of the top of the sliding clamping block.

Furthermore, the self-locking mechanism further comprises a shell arranged at the top of the outer wall of the outer barrel, the upper ends of the self-locking rack, the sliding clamping block, the self-locking spring and the rack mounting rod are arranged in the shell, the bottom of the unlocking rod extends into the shell through a through hole in the shell and is aligned with a guide structure at the top of the sliding clamping block, the unlocking device further comprises a second reset spring, the second reset spring is sleeved outside the unlocking rod, a blocking shoulder is arranged at a position, close to the middle of the unlocking rod, on the upper portion, the upper end of the second reset spring abuts against the blocking shoulder, the lower end of the second reset spring abuts against a flange arranged on the inner wall of the shell, and the second reset spring is used for enabling the unlocking rod to move upwards to the bottom of the unlocking rod to be separated from the sliding clamping block after external pressure is withdrawn, so that.

Furthermore, the first compound spring comprises a central spring positioned at the central position of the inner cylinder and the outer cylinder and a plurality of peripheral springs positioned on the radial periphery of the central spring and respectively sleeved at the lower ends of the rack mounting rods.

Furthermore, the rotary movable blades are a plurality of rotary movable blades which are distributed on the inner wall of the bottom of the outer cylinder in a central symmetry mode, and the self-locking mechanism and the unlocking device are also a plurality of sets which are distributed on the outer wall of the top of the outer cylinder in a central symmetry mode.

Preferably, the bottom edge and the top edge of the flap hole are both provided with inclined surfaces so as to facilitate the up-and-down movement of the inner cylinder.

Further, be provided with vertical conducting bar and guide slot between inner tube outer wall and the urceolus inner wall, the conducting bar matches with the guide slot slip, and guide slot and conducting bar on the one hand lead the up-and-down motion of inner tube, and on the other hand can carry out circumference spacing to the inner tube, prevents that the relative urceolus of inner tube from taking place circumferential direction.

The utility model discloses following beneficial effect has at least:

the utility model provides a binocular loose-leaf card is got from locking-type pick core drill section of thick bamboo fills up the rocky piece in the inner tube and makes the inner tube overcome first reset spring's pressure and when relative urceolus shifts up, the rotation loose-leaf end of urceolus bottom can be opened gradually, and self-locking mechanism can pin the inner tube with the position of rotating the loose-leaf, makes the rocky piece in the inner tube block to prevent that the rocky piece from dropping from the inner tube. The unlocking rod of the unlocking device is pressed to unlock the position of the inner cylinder and the angle of the rotary flap, and rock unloading is completed.

The utility model discloses an inside and outside binocular structure is set to from locking-type pick core drill section of thick bamboo to binocular loose leaf card for the rotation loose leaf that blocks the rock mass can be opened along with the rising of inner tube, and can pack up along with the decline of inner tube, rotates the loose leaf promptly and can fill up the automatic opening behind the rock mass in the inner tube, need not the manual work and open, when needing to unload the rock mass, presses down the unblock pole and can unblock, rotates the loose leaf and can pack up, simple structure, convenient operation and efficient. The rotary movable blade has no influence on the rotary drilling work of the outer barrel, the drilling resistance of the drilling barrel is small, and the drilling work efficiency can be further improved.

The utility model discloses a bore a section of thick bamboo and be provided with the gib block and the guide slot that slide matches between interior urceolus, can reciprocate to the axial of inner tube on the one hand and provide the guide effect, and on the other hand can prevent that the relative urceolus of inner tube from taking place circumferential direction.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a front view block diagram of a dual barrel loose leaf clamp self locking pick core drill barrel according to a preferred embodiment of the present invention;

FIG. 2 is a first view of a rotary flap of the dual barrel flap clamp of the preferred embodiment of the present invention taken from the lock type pick core drill barrel (the rotary flap is in a retracted state);

FIG. 3 is a second rotary flap structure view of the dual barrel flap clamp of the preferred embodiment of the present invention taken from the lock pick core drill barrel (the rotary flap is in an open position);

FIG. 4 is a top view of the inner and outer barrels of the dual barrel loose leaf clamp self locking pick core drill barrel of the preferred embodiment of the present invention;

fig. 5 is a front view of a dual barrel flap clamp of the preferred embodiment of the invention taken from the flap hole of a lock pick core drill barrel.

In the figure: 1-outer cylinder, 11-cutting pick, 12-rotating shaft, 13-guide hole, 14-connecting seat, 15-guide groove, 16-felt strip, 2-inner cylinder, 21-flap hole, 211-bottom edge, 212-top edge, 22-guide strip, 3-first return spring, 31-central spring, 32-peripheral spring, 4-rotating flap, 5-self-locking mechanism, 51-self-locking rack, 511-tooth space, 512-tooth, 513-upper tooth surface, 514-lower tooth surface, 52-rack mounting rod, 53-sliding fixture block, 531-head, 532-guide structure, 54-self-locking spring, 55-shell, 6-unlocking device, 61-unlocking rod, 611-retaining shoulder and 62-second return spring.

Detailed Description

The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Referring to fig. 1 to 4, a double-cylinder loose-leaf clamping self-locking type cutting tooth coring drill cylinder comprises an outer cylinder 1, an inner cylinder 2, a first reset spring 3, a plurality of rotary loose leaves 4, a plurality of sets of self-locking mechanisms 5 and unlocking devices 6 corresponding to each set of self-locking mechanisms:

the bottom of the outer cylinder is provided with cutting teeth 11 for cutting a rock mass, the inner cylinder is arranged on the radial inner side of the outer cylinder, the inner space of the inner cylinder is used for accommodating the rock mass, and the inner cylinder can move up and down along the axial direction of the outer cylinder;

in the embodiment, one end of the rotary flap is rotatably connected with the inner wall of the lower part of the outer cylinder through a rotating shaft 12, the lower part of the inner cylinder is provided with a flap hole 21, the inner cylinder is filled with rock blocks and upwards extrudes the inner cylinder until the outer top wall of the inner cylinder overcomes the elastic force of the first return spring 3, so that the inner cylinder is upwards displaced relative to the outer cylinder, the bottom edge of the flap hole pushes the tail end of the rotary flap to upwards rotate and gradually open and extend into the inner space of the inner cylinder, and when the tail end of the rotary flap upwards extends into the inner space of the inner cylinder, the tail end of the rotary flap can block the rock mass in; when the inner cylinder descends relative to the outer cylinder, under the pushing of the top edge of the flap hole, the tail end of the rotary flap rotates downwards to be gradually retracted and finally contained in the flap hole, and when the tail end of the rotary flap rotates downwards to be contained in the flap hole, the rock mass in the inner cylinder can smoothly fall out downwards;

in the embodiment, the first return spring is abutted between the top of the outer wall of the inner cylinder and the top of the inner wall of the outer cylinder, and the first return spring is used for abutting against the inner cylinder along the axial downward direction of the outer cylinder to keep the inner cylinder at an original position, so that the tail end of the rotary flap is always in a retracted state before the top of the inner wall of the inner cylinder is not subjected to upward extrusion force of rocks;

in this embodiment, the self-locking mechanism 5 is disposed at the top of the outer barrel, the self-locking mechanism includes a self-locking rack 51, a rack mounting rod 52, a sliding fixture 53 and a self-locking spring 54, the lower end of the rack mounting rod is fixedly connected to the top wall of the inner barrel, the middle portion of the rack mounting rod is inserted into the guide hole 13 disposed at the top of the outer barrel, the rack mounting rod can move up and down relative to the outer barrel under the guide of the guide hole, the self-locking rack is mounted at the upper end of the rack mounting rod, a sliding chute for sliding the bottom of the sliding block is disposed at the top of the outer wall of the outer barrel, the sliding fixture can slide in the sliding chute at the top of the outer wall of the outer barrel and approach or keep away from the self-locking rack, a head 531 matched with the tooth socket shape of the self-locking rack is disposed at one end of the sliding fixture close to the self-locking rack, the one In the groove 511, an upper tooth surface 513 of each tooth 512 of the self-locking rack is an inclined surface, a lower tooth surface 514 is a plane, the top surface of the head of the sliding fixture block is a plane, and the bottom surface of the head of the self-locking rack is an inclined surface matched with the upper tooth surface of the self-locking rack in a sliding manner, so that the self-locking rack can move upwards under the action of an upward thrust, the sliding fixture block is pushed away from the self-locking rack once when the self-locking rack moves upwards by the distance of one tooth, but under the condition that the sliding fixture block is not interfered by an external force, the self-locking rack can be clamped by the sliding fixture block and cannot move downwards, namely, the self;

when the inner barrel is filled with the rock blocks to enable the inner barrel to overcome the pressure of the first return spring and move upwards relative to the outer barrel, the self-locking rack can continuously push the sliding fixture block away from the self-locking rack through each inclined upper tooth surface sequentially arranged from top to bottom, and when the outer top wall of the inner barrel abuts against the inner top wall of the outer barrel and cannot move upwards any more, the head of the sliding fixture block is clamped in a certain tooth groove below the self-locking rack, and at the moment, the tail end of the rotating movable blade at the bottom of the outer barrel is in an open state to just block the rock blocks in the inner barrel so as to prevent the rock blocks from falling from the inner barrel;

in this embodiment, unlocking device 6 sets up at the urceolus top and is located the top of slip fixture block 53, unlocking device includes flexible unlocking lever 61 from top to bottom, and the top of slip fixture block is equipped with guide structure 532, the guide structure at slip fixture block top is aimed at to the bottom of unlocking lever, presses the unlocking lever downwards, can make the slip fixture block remove to the direction of keeping away from the auto-lock rack to can make the slip fixture block head of card in the auto-lock rack tooth's socket break away from the tooth's socket and realize the unblock of inner tube, even make the inner tube can move down relatively the urceolus, rotate the loose leaf and reply to the state of packing up, so that unload the detritus in the inner tube.

In this embodiment, the rack mounting rod is provided with a blocking portion that cannot pass through the guide hole, the blocking portion may be a tooth at the lowermost end of the self-locking rack on the rack mounting rod, and after the inner cylinder descends to the position where the rotary flap is retracted, the blocking portion of the rack mounting rod is blocked so that the inner cylinder cannot descend any more.

In this embodiment, the guiding structure 532 at the top of the sliding latch is an inclined pressure-bearing surface disposed at the middle position of the top of the sliding latch, and the bottom of the unlocking rod 61 may be disposed in a spherical structure to reduce friction with the guiding structure and reduce resistance.

In this embodiment, the self-locking mechanism further comprises a housing 55 disposed on the top of the outer wall of the outer cylinder, the upper ends of the self-locking rack, the sliding fixture block, the self-locking spring and the rack mounting rod are all disposed in the housing 55, the bottom of the unlocking rod extends into the shell through a through hole 551 on the shell to be aligned with the guide structure at the top of the sliding fixture block, the unlocking device also comprises a second return spring 62 which is sleeved on the periphery of the unlocking rod 61, a blocking shoulder 611 is arranged at the upper part of the middle of the unlocking rod, the upper end of the second reset spring is abutted against the blocking shoulder, the lower end of the second reset spring is abutted against a flange (not shown in the figure) arranged on the inner wall of the shell, and the second reset spring is used for enabling the unlocking rod to move upwards to the bottom of the unlocking rod to be separated from the contact with the sliding clamping block after external pressure is removed, so that the rack mounting rod and the inner cylinder can restart the next self-locking and unlocking cycle.

In this embodiment, the first compound spring 3 includes a central spring 31 located at the central position of the inner cylinder and the outer cylinder, and a plurality of peripheral springs 32 located at the radial periphery of the central spring and respectively sleeved at the lower ends of the rack mounting rods.

In this embodiment, the rotary flap is a plurality of centrally symmetrical flaps distributed on the inner wall of the bottom of the outer cylinder, and the flap holes at the bottom of the inner cylinder corresponding to the rotary flaps one by one are also centrally symmetrical. Referring to fig. 5, the top edge 212 of the hinge hole is a straight edge to facilitate the lifting of the hinge, and the bottom edge 211 of the hinge hole is a circular arc edge to facilitate the lifting under force and reduce the adhesion of soil. In addition, in order to facilitate the up-and-down movement of the inner cylinder, the bottom edge 211 and the top edge 212 of the flap hole are both arranged into inclined planes, and the inclined directions of the bottom edge 211 and the top edge 212 are both arranged as follows: the juncture of the outer wall of the inner cylinder, the bottom edge and the top edge is an upper large-diameter end, and the juncture of the inner wall of the inner cylinder, the bottom edge and the top edge is a lower small-diameter end.

In this embodiment, a connecting seat 14 for connecting a drill rod is disposed at a central position of an outer wall of the top of the outer cylinder, and the self-locking mechanism and the unlocking device are also a plurality of sets distributed on the periphery of the connecting seat 14 in a central symmetry manner. The peripheral springs 32 on the rack mounting rods are also arranged to be in a central symmetrical structure so as to provide uniform reset thrust for the inner barrel, effectively ensure the coaxiality between the inner barrel and the outer barrel and prevent the inner barrel from being blocked in the downward movement process.

In order to ensure the sliding between the inner cylinder and the outer cylinder and the working environment of each spring, a sealing ring is arranged between the rack mounting rod and the guide hole, and a sealing ring is also arranged between the unlocking rod and the through hole of the shell; the inner wall of the bottom of the outer barrel is provided with a circle of felt strips 16 above the rotary movable blade, and the felt strips are used for preventing gravel and broken stone from entering a gap between the inner barrel and the outer barrel from the bottom and preventing the inner barrel from being blocked.

Referring to fig. 4, in this embodiment, the outer wall of the inner cylinder is convexly provided with a guide strip 22, the inner wall of the outer cylinder is concavely provided with a guide groove 15, the guide strip is matched with the guide groove in a sliding manner, and the guide groove and the guide strip can guide the up-and-down movement of the inner cylinder on one hand and can circumferentially limit the inner cylinder on the other hand so as to prevent the inner cylinder from circumferentially rotating relative to the outer cylinder.

The utility model discloses a binocular loose leaf card is got from locking-type pick core and is bored a section of thick bamboo working process and principle roughly as follows:

in the drilling process, before rock blocks in the inner barrel are not filled, the top wall of the inner barrel is not extruded, the inner barrel keeps the original position under the pressure action of the first return spring, the rotary flap is in a retracted state at the moment, and the rock blocks in the inner barrel continue to increase. In the drilling process, the rock blocks in the inner barrel are gradually extruded until the top of the inner barrel is pushed to be gradually self-locked, and the movable leaves are gradually opened.

After the rock in the inner tube is filled up, the top wall of the inner tube is upwards extruded, the inner tube rises after the elasticity of the first return spring is overcome, the inner tube cannot rise again after the first return spring is compressed to a certain degree or is completely compressed, the sliding clamping block locks the inner tube through the self-locking rack, and at the moment, the rotating movable leaf is in an open state to block the rock in the inner tube, so that the rock is prevented from falling. It should be noted that, because the rock blocks compressed in the inner cylinder have a mutual blocking function, and the rock blocks are generally large, the area of the rotary flap does not need to be set to be large, the whole rock block can be blocked only by blocking a certain part of the rock block, and the blocking function is provided for the rock blocks around the whole rock block through the rock block.

After the rock mass in the inner tube is filled up, the drill rod is lifted upwards, the drill tube is lifted out for drilling, the lower end of a rotary turntable of the rotary drilling rig is provided with a disc, an unlocking rod can trigger the disc in the process of rising while drilling the drill tube to realize unlocking, after the unlocking, a sliding clamping block is separated from a self-locking rack, the inner tube drives the internal rock mass to move downwards together under the action of a first reset spring, and the inner tube is clamped by a rotating movable leaf and/or a self-locking tooth at the lowest end of the self-locking rack.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a double-cylinder loose leaf card is got from locking-type pick core drill section of thick bamboo which characterized in that, includes urceolus (1), inner tube (2), first reset spring (3), a plurality of rotates loose leaf (4), a plurality of sets of self-locking mechanism (5) and with each set of self-locking mechanism correspond unlocking device (6):

the bottom of the outer cylinder is provided with cutting teeth (11) for cutting a rock mass, the inner cylinder is arranged on the radial inner side of the outer cylinder, the inner space of the inner cylinder is used for accommodating the rock mass, and the inner cylinder can move up and down along the axial direction of the outer cylinder;

one end of the rotary flap is rotatably connected with the inner wall of the lower part of the outer barrel, a flap hole (21) is arranged at the lower part of the inner barrel, when the inner barrel ascends relative to the outer barrel, the bottom edge of the flap hole pushes the tail end of the rotary flap to rotate upwards and gradually open and finally extend into the inner space of the inner barrel, and when the tail end of the rotary flap extends upwards into the inner space of the inner barrel, the tail end of the rotary flap can block a rock mass in the inner barrel; when the inner cylinder descends relative to the outer cylinder, under the action of the top edge of the movable leaf hole, the tail end of the rotary movable leaf rotates downwards to be gradually retracted and finally accommodated in the movable leaf hole, and when the tail end of the rotary movable leaf rotates downwards to be accommodated in the movable leaf hole, a rock mass in the inner cylinder can smoothly fall out downwards;

the first return spring is abutted between the top of the outer wall of the inner barrel and the top of the inner wall of the outer barrel and is used for abutting against the inner barrel along the axial downward direction of the outer barrel, so that the tail end of the rotary flap is always in a retracted state before the top of the inner wall of the inner barrel is not subjected to upward extrusion force of rocks;

the self-locking mechanism is arranged at the top of the outer barrel and comprises a self-locking rack (51), a rack mounting rod (52), a sliding fixture block (53) and a self-locking spring (54), the lower end of the rack mounting rod is fixedly connected with the top wall of the inner barrel, the middle part of the rack mounting rod is arranged in a guide hole (13) formed in the top of the outer barrel in a penetrating manner, the rack mounting rod can move up and down relative to the outer barrel under the guide of the guide hole, the self-locking rack is arranged at the upper end of the rack mounting rod, the sliding fixture block can slide at the top of the outer barrel and is close to or far away from the self-locking rack, one end, close to the self-locking rack, of the sliding fixture block is provided with a head (531) matched with the tooth socket shape of the self-locking rack, one end, far away from the self-locking rack, of the sliding fixture block is connected with the self-, the upper tooth surface (513) of each tooth (512) of the self-locking rack is an inclined surface, the lower tooth surface (514) of the self-locking rack is a plane, the top surface of the head of the sliding fixture block is a plane, the bottom surface of the head of the self-locking rack is an inclined surface matched with the upper tooth surface of the self-locking rack in a sliding manner, so that the self-locking rack can move upwards under the action of upward thrust, the sliding fixture block is pushed away from the self-locking rack once when the self-locking rack moves upwards by the distance of one tooth, but under the condition that the sliding fixture block is not interfered by external force, the self-locking rack can be clamped by the sliding fixture block and cannot move downwards, namely;

when the inner barrel is filled with the rock blocks to enable the inner barrel to overcome the pressure of the first return spring and move upwards relative to the outer barrel, the self-locking rack can continuously push the sliding fixture block away from the self-locking rack through each inclined upper tooth surface sequentially arranged from top to bottom, and when the outer top wall of the inner barrel abuts against the inner top wall of the outer barrel and cannot move upwards any more, the head of the sliding fixture block is clamped in a certain tooth groove below the self-locking rack, and at the moment, the tail end of the rotating movable blade at the bottom of the outer barrel is in an open state to just block the rock blocks in the inner barrel so as to prevent the rock blocks from falling from the inner barrel;

unlocking device sets up at the urceolus top and is located the top of slip fixture block (53), unlocking device is including flexible unlocking lever (61) from top to bottom, and the top of slip fixture block is equipped with guide structure (532), the guide structure at slip fixture block top is aimed at to the bottom of unlocking lever, pushes down the unlocking lever, can make the slip fixture block remove to the direction of keeping away from the auto-lock rack to can make the slip fixture block head of card in the auto-lock rack tooth's socket break away from the tooth's socket and realize the unblock of inner tube, even make the inner tube can move down relatively the urceolus, rotate the loose leaf and reply to the state of packing up, so that unload the detritus in the inner tube.

2. The dual barrel flap snap-on self-locking pick core drill barrel of claim 1, wherein the rack mounting bar is provided with a stop portion that cannot pass through the guide hole, and wherein the stop portion of the rack mounting bar is stopped after the inner barrel is lowered until the rotary flap is retracted, so that the inner barrel cannot be further lowered.

3. The double-barrel loose-leaf clamping self-locking pick-up core drill barrel as claimed in claim 2, wherein the stopping part on the rack mounting rod can be the lowest teeth of the self-locking rack on the rack mounting rod or a ring of stopping ring protruding from the outer wall of the rack mounting rod.

4. The dual barrel loose-leaf clamp self-locking pick coring bit of claim 1, wherein the guide structure at the top of the sliding clamp block is an inclined bearing surface disposed at a middle position of the top of the sliding clamp block.

5. The dual barrel loose leaf clamp self-locking pick coring bit barrel of claim 1, the self-locking mechanism also comprises a shell (55) arranged at the top of the outer wall of the outer cylinder, the upper ends of the self-locking rack, the sliding fixture block, the self-locking spring and the rack mounting rod are all arranged in the shell, the bottom of the unlocking rod extends into the shell through the through hole on the shell and is aligned with the guide structure at the top of the sliding clamping block, the unlocking device also comprises a second return spring (62), the second return spring is sleeved outside the unlocking rod, a blocking shoulder (611) is arranged at the upper part of the middle of the unlocking rod, the upper end of the second reset spring is abutted against the blocking shoulder, the lower end of the second reset spring is abutted against a flange arranged on the inner wall of the shell, and the second reset spring is used for enabling the unlocking rod to move upwards to the bottom of the unlocking rod to be separated from the contact with the sliding clamping block after external pressure is removed, so that the rack mounting rod and the inner cylinder can restart the next self-locking and unlocking cycle.

6. The double-barrel loose-leaf clamp self-locking pick core drill barrel as claimed in claim 1, wherein the first complex spring comprises a central spring (31) located at the central position of the inner barrel and the outer barrel and a plurality of peripheral springs (32) located at the radial periphery of the central spring and respectively sleeved at the lower ends of the rack mounting rods.

7. The double-barrel flap snap-on self-locking pick core drill barrel as claimed in claim 1, wherein the rotary flaps are a plurality of rotary flaps arranged on the inner wall of the bottom of the outer barrel in a central symmetry manner, and the self-locking mechanism and the unlocking device are a plurality of sets arranged on the outer wall of the top of the outer barrel in a central symmetry manner.

8. The dual barrel flap card self locking pick coring bit of claim 1 wherein the bottom edge (211) and top edge (212) of the flap hole are each provided as an inclined surface to facilitate up and down movement of the inner barrel.

9. The double-barrel loose-leaf clamping self-locking type cutting pick core drill barrel as claimed in any one of claims 1-8, wherein a vertical guide strip (22) and a guide groove (15) are arranged between the outer wall of the inner barrel and the inner wall of the outer barrel, the guide strip is matched with the guide groove in a sliding mode, the guide groove and the guide strip guide up and down movement of the inner barrel on one hand, and can limit the inner barrel in the circumferential direction on the other hand, so that the inner barrel is prevented from rotating in the circumferential direction relative to the outer barrel.

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