CN110872936B - Double-cylinder movable blade clamp self-locking type pick core drill cylinder - Google Patents
Double-cylinder movable blade clamp self-locking type pick core drill cylinder Download PDFInfo
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- CN110872936B CN110872936B CN201911360595.0A CN201911360595A CN110872936B CN 110872936 B CN110872936 B CN 110872936B CN 201911360595 A CN201911360595 A CN 201911360595A CN 110872936 B CN110872936 B CN 110872936B
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- 239000011435 rock Substances 0.000 claims abstract description 74
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000000903 blocking effect Effects 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 210000003781 tooth socket Anatomy 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 48
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000002689 soil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention provides a double-cylinder loose leaf clamp self-locking pick core drill cylinder which comprises an outer cylinder, an inner cylinder, a first reset spring, a plurality of rotary loose leaves, a plurality of sets of self-locking mechanisms and unlocking devices corresponding to the self-locking mechanisms. When the inner cylinder is filled with rock mass to enable the inner cylinder to move upwards relative to the outer cylinder against the pressure of the first reset spring, the tail end of the rotating movable blade at the bottom of the outer cylinder can be gradually opened, and the self-locking mechanism can lock the positions of the inner cylinder and the rotating movable blade, so that the rock mass in the inner cylinder is blocked, and the rock mass is prevented from falling from the inner cylinder. And the unlocking rod of the unlocking device is pressed, so that the locking of the position of the inner cylinder and the angle of the rotary movable blade can be released, and the rock unloading is completed. The invention has simple structure, convenient operation and high efficiency. The rotary movable blades have no influence on the rotary drilling work of the outer cylinder, the drilling resistance of the drilling cylinder is small, and the drilling work efficiency is high. The guide strip and the guide groove which are matched in a sliding way are arranged between the inner cylinder and the outer cylinder, so that a guide effect is provided for the movement of the inner cylinder, and the inner cylinder can be prevented from rotating circumferentially relative to the outer cylinder.
Description
Technical Field
The invention relates to a rotary drilling tool of a rotary drilling rig, in particular to a double-cylinder movable blade clamping self-locking pick core drilling cylinder.
Background
The pick core drill barrel is a rotary drilling tool with more use, is mainly used for drilling hard rock or a mixed soil layer with the hard rock, is mainly used for cutting the rock in the rotary drilling process and extracting the cut rock to drill holes, is of a single-wall micro-cone barrel type structure, is provided with picks for cutting the rock at the bottom, is provided with a water outlet, is connected with a drill rod of the rotary drilling machine through a square tenon bolt structure, and receives pressure and torque transmitted by the drill rod. When the cutting pick coring drilling barrel works, the drill rod transmits pressure and torque to the drilling barrel, the cutting pick at the bottom of the drilling barrel cuts rock, along with the increase of drilling depth, the cut rock is continuously piled in the drilling barrel, when the broken rock blocks are filled with the drilling barrel and compacted, the drilling barrel is lifted out of the drilling hole, and after the drilling barrel is lifted out, the positive and negative rotary drill rod throws the broken rock blocks out of the drilling barrel for next construction.
The existing pick core drilling barrel is of a single-wall barrel type structure, and the picks at the bottom of the pick core drilling barrel can efficiently cut rock, but can not thoroughly extract the rock stored in the drilling barrel to drill holes, mainly because the pick core drilling barrel is not provided with a rock block clamping device, the compacted broken rock blocks fall in the process of being filled with the drilling barrel and being lifted upwards, and the coring efficiency is seriously affected. In addition, when the drilling machine is utilized to swing the drilling cylinder in the rock unloading process outside the hole, broken rock in the drilling cylinder easily impacts the inner wall of the drilling cylinder, so that longer-time noise is generated, and the construction environment is influenced.
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, the scheme of the rotary drilling rig is disclosed in Chinese patent 201910653190.X, a drill bit door capable of being turned and opened is arranged at the opening at the bottom of the drilling bucket, and a turning device is also connected with a driving oil cylinder, so that the rotary drilling rig is complex in structure, more in operation steps and unfavorable for improving the construction efficiency. In addition, chinese patent 201220354155.1 discloses a split drill with a soil retaining mechanism, in which the cutter teeth are replaced by picks for drilling hard rock, and a baffle mechanism for soil retaining is added at the opening of the bottom of the drill, which can retain soil but increase the resistance in the drilling process, and the large hard rock is difficult to enter the drill because of the vertical bidirectional blocking effect of the baffle. Therefore, there is a need in the art for a drilling tool that is suitable for hard rock cutting, has a simple structure, is convenient to operate, and has high efficiency, so as to solve the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide a double-cylinder loose-leaf clamp self-locking pick core drill cylinder, which solves the problems in the background technology.
A double-cylinder movable blade clamp is taken from locking-type pick core drill cylinder comprises an outer cylinder, an inner cylinder, a first reset spring, a plurality of rotary movable blades, a plurality of sets of self-locking mechanisms and unlocking devices corresponding to each set of self-locking mechanisms:
the bottom of the outer cylinder is provided with a cutting pick for cutting rock, 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, and the inner cylinder can move up and down along the axial direction of the outer cylinder;
One end of the rotary movable blade is rotatably connected with the inner wall of the lower part of the outer cylinder, a movable blade hole is formed in the lower part of the inner cylinder, when the inner cylinder ascends relative to the outer cylinder, the bottom edge of the movable blade hole pushes the tail end of the rotary movable blade to rotate upwards to be opened gradually and finally extend into the inner space of the inner cylinder, and when the tail end of the rotary movable blade extends upwards into the inner space of the inner cylinder, the tail end of the rotary movable blade can block rock mass in the inner cylinder; when the inner cylinder descends relative to the outer cylinder, under the action of the top edge of the movable blade hole and/or under the action of self gravity or resilience force, the tail end of the movable blade rotates downwards to be gradually retracted and finally accommodated in the movable blade hole, and when the tail end of the movable blade rotates downwards to be accommodated in the movable blade hole, the rock mass in the inner cylinder can smoothly drop downwards;
The first return spring is propped between the top of the outer wall of the inner cylinder and the top of the inner wall of the outer cylinder, and is used for propping against the inner cylinder along the axial downward direction of the outer cylinder, so that the tail end of the rotary movable blade 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 rock;
The self-locking mechanism is arranged at the top of the outer cylinder, the self-locking mechanism comprises a self-locking rack, a rack mounting rod, a sliding clamping block and a self-locking spring, the lower end of the rack mounting rod is fixedly connected with the top wall of the inner cylinder, the middle part of the rack mounting rod is arranged in a guide hole arranged at the top of the outer cylinder in a penetrating way, the rack mounting rod can move up and down relative to the outer cylinder under the guide of the guide hole, the self-locking rack is arranged at the upper end of the rack mounting rod, the sliding clamping block can slide at the top of the outer cylinder and is close to or far away from the self-locking rack, one end of the sliding clamping block, which is close to the self-locking rack, is provided with a head matched with the tooth groove shape of the self-locking rack, the sliding clamping block is connected with the self-locking spring, the head of the sliding clamping block moves towards the direction, which is close to the self-locking rack, so that the head of the sliding clamping block is clamped into the tooth groove of the self-locking rack, the upper tooth surface of each tooth is a plane, the head top surface of the sliding clamping block is a plane, and the bottom surface of the self-locking rack is a sliding plane, the self-locking rack is matched with the upper tooth surface of the self-locking rack under the guide action of the upward thrust, the self-locking tooth surface, and the self-locking clamping block can move up on the top the inner cylinder, and the self-locking rack is not interfered with the self-locking rack, and can move down, but the self-locking clamping block is not slide down, and can slide down, and move down, and cannot slide block, and move, and against the self-locking block, and against the tooth bar, and against the tooth rack, and against the self-locking rack, and against self-locking device without the self locking rack, and against self locking top;
When the inner cylinder is filled with rock blocks so that the inner cylinder overcomes the pressure of the first reset spring and moves upwards relative to the outer cylinder, the self-locking rack can continuously push the sliding clamping blocks away from the self-locking rack through each inclined upper tooth surface which is sequentially arranged from top to bottom, and when the outer top wall of the inner cylinder is propped against the inner top wall of the outer cylinder and cannot move upwards any more, the head of the sliding clamping block is clamped in a tooth slot which is positioned below the self-locking rack, at the moment, the tail end of a rotating movable blade at the bottom of the outer cylinder is in an open state, and the rock blocks in the inner cylinder are just blocked so as to prevent the rock blocks from falling from the inner cylinder;
The unlocking device is arranged at the top of the outer cylinder and is positioned above the sliding clamping block, the unlocking device comprises an unlocking rod which can stretch up and down, the top of the sliding clamping block is provided with a guide structure, the bottom of the unlocking rod is aligned with the guide structure at the top of the sliding clamping block, the unlocking rod is pressed downwards, the sliding clamping block can move in a direction away from the self-locking rack, the head of the sliding clamping block clamped in the tooth slot of the self-locking rack is separated from the tooth slot, the unlocking of the inner cylinder is realized, the inner cylinder can move downwards relative to the outer cylinder, and the movable blade is rotated to return to a stowing state, so that the rock mass in the inner cylinder can be discharged.
The rack mounting rod is provided with a blocking part which cannot pass through the guide hole, and the inner cylinder descends to the position where the rotating movable blade is retracted, and the blocking part of the rack mounting rod is blocked to prevent the inner cylinder from continuously descending.
The blocking part on the rack mounting rod can be the tooth 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 guiding structure at the top of the sliding clamping block is an inclined bearing surface arranged at the middle position of the top of the sliding clamping block.
Further, the self-locking mechanism further comprises a shell arranged at the top of the outer wall of the outer cylinder, the self-locking rack, the sliding clamping block, the self-locking spring and the upper end of the rack installation rod are arranged in the shell, the bottom of the unlocking rod stretches into the shell through a through hole in the shell to align to 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 the position, close to the middle, of the unlocking rod, of the second reset spring, 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 until the bottom of the unlocking rod is separated from contact with the sliding clamping block after external pressure is removed, so that the rack installation rod and the inner cylinder can restart the next self-locking and unlocking cycle.
Further, the first compound spring comprises a central spring positioned at the central positions of the inner cylinder and the outer cylinder and a plurality of peripheral springs positioned at the radial periphery of the central spring and respectively sleeved at the lower ends of the rack mounting rods.
Furthermore, the rotating movable blades are a plurality of sleeves 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 a plurality of sleeves 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 movable blade hole are both provided with inclined planes 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, conducting bar and guide slot slip match, and the guide slot is directed the up-and-down motion of inner tube with the conducting bar on the one hand, and on the other hand can carry out the circumference spacing to the inner tube, prevents that the relative urceolus of inner tube from taking place circumference rotation.
The invention has at least the following beneficial effects:
the invention provides a double-cylinder movable blade clamp self-locking pick core drill barrel, when the inner barrel is filled with rock blocks to enable the inner barrel to move upwards relative to the outer barrel against the pressure of a first reset spring, the tail end of a rotary movable blade at the bottom of the outer barrel can be gradually opened, and a self-locking mechanism can lock the positions of the inner barrel and the rotary movable blade to enable the rock blocks in the inner barrel to be blocked, so that the rock blocks are prevented from falling from the inner barrel. And the unlocking rod of the unlocking device is pressed, so that the locking of the position of the inner cylinder and the angle of the rotary movable blade can be released, and the rock unloading is completed.
The double-cylinder movable blade clamp is arranged into an inner-outer double-cylinder structure, the rotary movable blade for blocking the rock blocks can be opened along with the ascending of the inner cylinder and can be retracted along with the descending of the inner cylinder, namely, the rotary movable blade can be automatically opened after the inner cylinder is filled with the rock blocks, the rotary movable blade is not required to be opened manually, the unlocking rod is pressed to unlock when the rock blocks are required to be unloaded, and the rotary movable blade can be retracted. 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 drill barrel is provided with the guide bars and the guide grooves which are matched in a sliding manner between the inner barrel and the outer barrel, so that on one hand, the guide bars and the guide grooves can provide a guide effect for the axial up-and-down movement of the inner barrel, and on the other hand, the inner barrel can be prevented from rotating circumferentially relative to the outer barrel.
In addition to the objects, features and advantages described above, 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 included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a front view block diagram of a dual barrel flapper taken from a lock pick core drill barrel in accordance with a preferred embodiment of the present invention;
FIG. 2 is a diagram of the structure of a rotary flap of a double-barrel flap card of the preferred embodiment of the present invention taken from a lock pick core drill barrel (the rotary flap in a stowed condition);
FIG. 3 is a second rotary flap structure diagram of a double barrel flap card of the preferred embodiment of the present invention taken from a lock pick core drill barrel (rotary flaps in an open state);
FIG. 4 is a top view block diagram of the inner and outer barrels of a dual barrel flapper self-locking pick core drill barrel in accordance with a preferred embodiment of the present invention;
Fig. 5 is a front view block diagram of a dual barrel flapper taken from a flapper bore of a locking pick core drill barrel in accordance with a preferred embodiment of the present invention.
In the figure: 1-outer cylinder, 11-pick, 12-rotating shaft, 13-guiding hole, 14-connecting seat, 15-guiding groove, 16-felt strip, 2-inner cylinder, 21-movable blade hole, 211-bottom edge, 212-top edge, 22-guiding strip, 3-first reset spring, 31-center spring, 32-peripheral spring, 4-rotating movable blade, 5-self-locking mechanism, 51-self-locking rack, 511-tooth socket, 512-tooth, 513-upper tooth surface, 514-lower tooth surface, 52-rack mounting rod, 53-sliding fixture, 531-head, 532-guiding structure, 54-self-locking spring, 55-shell, 6-unlocking device, 61-unlocking rod, 611-shoulder and 62-second reset spring.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 1 to 4, a double-cylinder loose leaf clamp is taken from a locking pick core drill barrel, which comprises an outer barrel 1, an inner barrel 2, a first reset spring 3, a plurality of rotating 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 a cutting pick 11 for cutting 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 a rotary movable blade is rotatably connected with the inner wall of the lower part of the outer cylinder through a rotating shaft 12, a movable blade hole 21 is formed in the lower part of the inner cylinder, rock blocks are filled in the inner cylinder to upwards extrude the inner cylinder until the top wall outside the inner cylinder overcomes the elastic force of a first reset spring 3, so that the inner cylinder is upwards displaced relative to the outer cylinder, the bottom edge of the movable blade hole pushes the tail end of the rotary movable blade to upwards rotate to gradually open and extend into the inner space of the inner cylinder, and when the tail end of the rotary movable blade upwards extends into the inner space of the inner cylinder, the tail end of the rotary movable blade can block the rock blocks in the inner cylinder; when the inner cylinder descends relative to the outer cylinder, the tail end of the rotary movable blade rotates downwards to be gradually retracted and finally accommodated in the movable blade hole under the pushing of the top edge of the movable blade hole, and when the tail end of the rotary movable blade rotates downwards to be accommodated in the movable blade hole, rock mass in the inner cylinder can smoothly drop downwards;
In the embodiment, the first reset spring is propped 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 reset spring is used for propping the inner cylinder along the axial downward direction of the outer cylinder, so that the inner cylinder keeps an original position, and the tail end of the rotary movable blade 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 rock;
In the embodiment, the self-locking mechanism 5 is arranged at the top of the outer cylinder, the self-locking mechanism comprises a self-locking rack 51, a rack mounting rod 52, a sliding clamping 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 cylinder, the middle part of the rack mounting rod is arranged in a guide hole 13 arranged at the top of the outer cylinder in a penetrating way, the rack mounting rod can move up and down relative to the outer cylinder under the guide of the guide hole, the self-locking rack is arranged at the upper end of the rack mounting rod, a sliding groove for sliding the bottom of the sliding block is arranged at the top of the outer wall of the outer cylinder, the sliding clamping block can slide in the sliding groove at the top of the outer wall of the outer cylinder and is close to or far away from the self-locking rack, one end of the sliding clamping block close to the self-locking rack is provided with a head 531 matched with the shape of the tooth groove of the self-locking rack, the end of the sliding clamping block, which is far away from the self-locking rack, is connected with the self-locking spring 54, the self-locking spring pushes the sliding clamping block to move towards the direction close to the self-locking rack so that the head of the sliding clamping block is clamped into a tooth slot 511 of the self-locking rack, the upper tooth surface 513 of each tooth 512 of the self-locking rack is an inclined surface, the lower tooth surface 514 is a plane, the top surface of the head of the sliding clamping block is a plane, the bottom surface is an inclined surface which is in sliding matching with the upper tooth surface of the self-locking rack, so that the self-locking rack can move upwards under the upward thrust action, and the sliding clamping block is pushed away from the self-locking rack once every time when the self-locking rack moves upwards by one tooth distance, but the self-locking rack can not be clamped by the sliding clamping block under the condition that the sliding clamping block is not interfered by external force, namely, the self-locking of a rack mounting rod and an inner barrel is realized, and the inner barrel cannot move downwards relative to the outer barrel;
When the inner cylinder is filled with rock blocks so that the inner cylinder overcomes the pressure of the first reset spring and moves upwards relative to the outer cylinder, the self-locking rack can continuously push the sliding clamping blocks away from the self-locking rack through each inclined upper tooth surface which is sequentially arranged from top to bottom, and when the outer top wall of the inner cylinder is propped against the inner top wall of the outer cylinder and cannot move upwards any more, the head of the sliding clamping block is clamped in a tooth slot which is positioned below the self-locking rack, at the moment, the tail end of a rotating movable blade at the bottom of the outer cylinder is in an open state, and the rock blocks in the inner cylinder are just blocked so as to prevent the rock blocks from falling from the inner cylinder;
In this embodiment, unlocking device 6 sets up at the urceolus top and is located the top of sliding fixture 53, unlocking device includes the unlocking lever 61 that can stretch out and draw back from top to bottom, and the top of sliding fixture is equipped with guide structure 532, the guide structure at sliding fixture top is aimed at to the bottom of unlocking lever, and the locking lever is pushed down, can make the sliding fixture to keeping away from the direction removal of auto-lock rack to can make the sliding fixture head that blocks in 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 relative to the urceolus, rotate the movable leaf and reply to the state of packing up, so as to discharge the rock mass in the inner tube.
In this embodiment, be provided with the location of stopping that can not pass the guiding hole on the rack installation pole, stop the position and can be the tooth of the lower extreme of auto-lock rack on the rack installation pole, the inner tube descends to and rotates the movable leaf and pack up the back, and the location of stopping of rack installation pole is stopped and makes the inner tube unable to descend again.
In this embodiment, the guiding structure 532 at the top of the sliding block is an inclined bearing surface disposed at the middle position of the top of the sliding block, and the bottom of the unlocking rod 61 may be configured as a spherical structure, so as to reduce friction with the guiding structure and reduce resistance.
In this embodiment, the self-locking mechanism further includes a housing 55 disposed at the top of the outer wall of the outer cylinder, the self-locking rack, the sliding fixture block, the self-locking spring and the upper end of the rack mounting rod are disposed in the housing 55, the bottom of the unlocking rod extends into the housing through a through hole 551 on the housing to align to the guiding structure at the top of the sliding fixture block, the unlocking device further includes a second return spring 62, the second return spring is sleeved on the periphery of the unlocking rod 61, a shoulder 611 is disposed at a position of the unlocking rod, the upper end of the second return spring abuts against the shoulder, the lower end abuts against a flange (not shown in the figure) disposed on the inner wall of the housing, and the second return spring is used for enabling the unlocking rod to move upwards until the bottom of the unlocking rod is separated from contact with the sliding fixture 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 positions 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 rotating flaps are a plurality of flaps which are distributed on the inner wall of the bottom of the outer cylinder in a central symmetry manner, and the flap holes at the bottom of the inner cylinder which are in one-to-one correspondence with the rotating flaps are also distributed in a central symmetry manner. Referring to fig. 5, to facilitate lifting of the flap, the top edge 212 of the flap aperture is straight and the bottom edge 211 of the flap aperture is rounded to facilitate forced lifting and reduce soil adhesion. 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 provided with inclined surfaces, and the inclined directions of the bottom edge 211 and the top edge 212 are respectively set as follows: so that the junction of the outer wall of the inner cylinder and the bottom edge and the top edge is an upper large-diameter end, and the junction of the inner wall of the inner cylinder and 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 the center of the outer wall of the top of the outer cylinder, and the self-locking mechanism and the unlocking device are also a plurality of sleeves 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 in a central symmetrical structure so as to provide uniform reset thrust for the inner cylinder, effectively ensure the coaxiality between the inner cylinder and the outer cylinder and prevent the inner cylinder from blocking 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; a circle of felt strips 16 are arranged on the inner wall of the bottom of the outer cylinder above the rotary movable blades and used for preventing gravel and broken stone from entering a gap between the inner cylinder and the outer cylinder from the bottom, and preventing the inner cylinder from being blocked.
Referring to fig. 4, in this embodiment, the outer wall of the inner cylinder is convexly provided with a guide bar 22, the inner wall of the outer cylinder is concavely provided with a guide groove 15, the guide bar is slidably matched with the guide groove, the guide groove and the guide bar guide the up-and-down movement of the inner cylinder on one hand, and on the other hand, the inner cylinder can be circumferentially limited to prevent the inner cylinder from rotating circumferentially relative to the outer cylinder.
The working process and principle of the double-cylinder loose leaf clamp self-locking type pick core drill cylinder are approximately as follows:
In the drilling process, before the 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 reset spring, the rotating movable blades are in a retracted state at the moment, and the rock blocks in the inner barrel are continuously increased. In the drilling process, the rock in the inner cylinder is gradually extruded until the top of the inner cylinder is pushed to be gradually self-locked, and the movable blades are gradually opened.
After the rock in the inner tube is filled up, the roof of the inner tube is extruded upwards, after the elasticity of the first reset spring is overcome, the inner tube rises, after the first reset spring is compressed to a certain degree or is completely compressed, the inner tube can not rise any more, the sliding clamping block locks the inner tube through the self-locking rack, at the moment, the rotating movable blade is in an open state, the rock in the inner tube is blocked, and the rock is prevented from falling. It should be noted that since the individual rock masses held down in the inner barrel are blocked by each other and the rock masses are generally relatively large, the area of the rotary flaps need not be so large that a single block of rock mass is blocked by only blocking a portion of the rock mass and a blocking effect is provided to surrounding rock masses by the rock mass.
After the rock in the inner barrel is filled, the drill rod is lifted upwards to lift the drilling barrel out of the drilling hole, the disc is arranged at the lower end of the rotary turntable of the rotary drilling rig, the unlocking rod can trigger the disc to unlock in the ascending process of the drilling barrel, the sliding clamping block is separated from the self-locking rack after unlocking, the inner barrel drives the inner rock to move downwards together under the action of the first reset spring until the inner barrel is clamped by the rotary movable blade and/or is clamped by the self-locking tooth at the bottommost end of the self-locking rack, at the moment, the rotary movable blade is completely retracted, the blocking effect of the rock is removed, and the rock continuously falls downwards under the downward inertia effect of the rotary movable blade to finish rock unloading.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The double-cylinder movable blade clamp is taken from a locking type pick core drill cylinder and is characterized by comprising an outer cylinder (1), an inner cylinder (2), a first reset spring (3), a plurality of rotary movable blades (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 a cutting pick (11) for cutting 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 movable blade is rotatably connected with the inner wall of the lower part of the outer cylinder, a movable blade hole (21) is formed in the lower part of the inner cylinder, when the inner cylinder ascends relative to the outer cylinder, the bottom edge of the movable blade hole pushes the tail end of the rotary movable blade to rotate upwards to be gradually opened and finally extend into the inner space of the inner cylinder, and when the tail end of the rotary movable blade extends upwards into the inner space of the inner cylinder, the tail end of the rotary movable blade can block rock mass in the inner cylinder; when the inner cylinder descends relative to the outer cylinder, under the action of the top edge of the movable blade hole and/or under the action of self gravity or resilience force, the tail end of the movable blade rotates downwards to be gradually retracted and finally accommodated in the movable blade hole, and when the tail end of the movable blade rotates downwards to be accommodated in the movable blade hole, the rock mass in the inner cylinder can smoothly drop downwards;
The first return spring is propped between the top of the outer wall of the inner cylinder and the top of the inner wall of the outer cylinder, and is used for propping against the inner cylinder along the axial downward direction of the outer cylinder, so that the tail end of the rotary movable blade 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 rock;
the self-locking mechanism is arranged at the top of the outer cylinder and comprises a self-locking rack (51), a rack mounting rod (52), a sliding clamping 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 cylinder, the middle part of the rack mounting rod is arranged in a guide hole (13) arranged at the top of the outer cylinder in a penetrating way, the rack mounting rod can move up and down relative to the outer cylinder under the guide of the guide hole, the self-locking rack is arranged at the upper end of the rack mounting rod, the sliding clamping block can slide at the top of the outer cylinder and is close to or far away from the self-locking rack, one end of the sliding clamping block close to the self-locking rack is provided with a head (531) matched with the tooth socket shape of the self-locking rack, one end of the sliding clamping block far away from the self-locking rack is connected with the self-locking spring (54), the self-locking spring pushes the sliding clamping block to move towards the direction close to the self-locking rack so that the head of the sliding clamping block is clamped into a tooth slot (511) of the self-locking rack, an upper tooth surface (513) of each tooth (512) of the self-locking rack is an inclined surface, a lower tooth surface (514) of the self-locking rack is a plane, the top surface of the head of the sliding clamping block is a plane, and the bottom surface of the head of the sliding clamping block is an inclined surface which is in sliding fit with the upper tooth surface of the self-locking rack, so that the self-locking rack can move upwards under the upward thrust action, the sliding clamping block is pushed away from the self-locking rack once every time the self-locking rack moves upwards by one tooth distance, but under the condition that the sliding clamping block is not interfered by external force, the self-locking rack can not be clamped by the sliding clamping block, namely the self-locking of a rack mounting rod and the inner barrel is realized, and the inner barrel cannot move downwards relative to the outer barrel;
When the inner cylinder is filled with rock blocks so that the inner cylinder overcomes the pressure of the first reset spring and moves upwards relative to the outer cylinder, the self-locking rack can continuously push the sliding clamping blocks away from the self-locking rack through each inclined upper tooth surface which is sequentially arranged from top to bottom, and when the outer top wall of the inner cylinder is propped against the inner top wall of the outer cylinder and cannot move upwards any more, the head of the sliding clamping block is clamped in a tooth slot which is positioned below the self-locking rack, at the moment, the tail end of a rotating movable blade at the bottom of the outer cylinder is in an open state, and the rock blocks in the inner cylinder are just blocked so as to prevent the rock blocks from falling from the inner cylinder;
The unlocking device is arranged at the top of the outer cylinder and is positioned above the sliding clamping block (53), the unlocking device comprises an unlocking rod (61) which can stretch up and down, the top of the sliding clamping block is provided with a guide structure (532), the bottom of the unlocking rod is aligned with the guide structure at the top of the sliding clamping block, the unlocking rod is pressed downwards, the sliding clamping block can move in the direction away from the self-locking rack, and therefore the head of the sliding clamping block clamped in the tooth slot of the self-locking rack can be separated from the tooth slot to unlock the inner cylinder, namely the inner cylinder can move downwards relative to the outer cylinder, and the movable blades are rotated to return to a retracted state so as to discharge rock blocks in the inner cylinder;
The rack mounting rod is provided with a blocking part which cannot pass through the guide hole, and the inner cylinder descends until the rotating movable blade is retracted, and the blocking part of the rack mounting rod is blocked so that the inner cylinder cannot descend any more;
The guide structure at the top of the sliding clamping block is an inclined bearing surface arranged at the middle position of the top of the sliding clamping block;
the bottom edge (211) and the top edge (212) of the movable blade hole are both provided with inclined planes so as to facilitate the up-and-down movement of the inner barrel.
2. The double-barrel loose-leaf clamp self-locking pick core drill barrel according to claim 1, wherein the blocking part on the rack mounting rod can be the tooth at the lowest end of the self-locking rack on the rack mounting rod or a circle of blocking ring protruding from the outer wall of the rack mounting rod.
3. The double-cylinder loose-leaf clamp self-locking pick core drill cylinder according to claim 1, wherein the self-locking mechanism further comprises a shell (55) arranged at the top of the outer wall of the outer cylinder, the self-locking rack, the sliding clamping block, the self-locking spring and the upper end of the rack mounting rod are all arranged in the shell, the bottom of the unlocking rod stretches into the shell through a through hole in the shell to align with a guide structure at the top of the sliding clamping block, the unlocking device further comprises a second reset spring (62), the second reset 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 be out of 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.
4. The self-locking pick core drill barrel of claim 1, wherein the first return spring comprises a central spring (31) located at the central positions 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 sleeved at the lower ends of the rack mounting rods respectively.
5. The double-cylinder loose-leaf clamp self-locking pick core drill cylinder according to claim 1, wherein the rotating loose-leaf is a plurality of loose-leaf clamps 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 a plurality of sleeves which are distributed on the outer wall of the top of the outer cylinder in a central symmetry mode.
6. The self-locking pick core drill barrel according to any one of claims 1-5, wherein a vertical guide bar (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 bar is matched with the guide groove in a sliding manner, the guide groove and the guide bar guide the up-and-down movement of the inner barrel on one hand, and the inner barrel can be limited 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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| CN111734299B (en) * | 2020-06-23 | 2022-05-03 | 天明(南京)智能装备科技有限公司 | Drilling process for large-diameter geological drilling |
| CN113176110B (en) * | 2020-08-26 | 2022-11-22 | 广东南方检测有限公司 | Highway quality testing gets core machine with type of cuting |
| CN113237693B (en) * | 2021-05-14 | 2022-07-29 | 河南省有色金属地质矿产局第一地质大队 | Energy-saving geological exploration drilling machine sampling equipment |
| CN116659939B (en) * | 2023-07-25 | 2023-10-13 | 河南中投建设有限公司辉县市分公司 | Assembled building grouting hole quality detection device |
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