A kind of pipe internal cutting deviceTechnical field
The utility model relates to cutting equipments, relate in particular to a kind of pipe internal cutting device.
Background technique
Contain earth layer of solitary stone in some regional geologies during Bridge Pile Foundation Construction, boulder layer is generally present in completely decomposedRock stratum top, when constructing completely decomposed, strongly weathered sand-rock, after rock pillar is gradually drilled scarfing cinder in hole, hole wall rock stratum occursDischarge sliding, generally causes undergauge and probe stone generates, and undergauge can be solved using reversed cleaning bottom of hole cutter, and stone of popping one's head in is meshThe a great problem of preceding pile foundation construction, probe stone cause useful area reduction drill bit in hole that can not above mention causing lock of tool drilling.
In order to solve the problems, such as probe stone bit freezing, the stone excision that need to will be popped one's head in using telescopic drill bit is come constraint relief (probe stoneWithin 60m depth, can be handled using artificial diving), and covering the premise bored is that original drilling rod is cleaned out to drilling,Since depth is more than 60m, and in slurry environment, therefore drilling rod need to be cut off using a kind of method of machine cuts, then be proposedDrilling.And lack such specialty cuts equipment at present.
Utility model content
The technical problem to be solved by the utility model is to provide one kind can be from the cutter device of pipe internal cutting pipeline.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution: a kind of pipe internal cutting device, includingDrive rod, tool apron and more than one cutting mechanism, the cutting mechanism include tool holder and blade；The drive rod is fixed to be connectedIt connects on the tool apron so that for driving the tool apron to rotate, the knife rest eccentric rotary is mounted on the tool apron, the knifePiece is fixedly connected on the knife rest；
Under rounding state, the blade of the blade holder turns to the knife rest and thereon outward without departing from the tool apron,Under cut state, by tool apron described in the drive rod rotation, the knife rest turns to institute thereon under the influence of centrifugal forceIt states blade and exceeds the tool apron outward.
Further, the tool apron includes two pieces of circular base slabs that are symmetrical and being spaced apart, the cutting mechanismIt is arranged between two pieces of circular base slabs, the drive rod is fixedly connected on the appearance of one of circular base slabFace center.
Further, the tool apron further includes the Y shape linking rib being connected between two pieces of circular base slabs.
Further, the cutting mechanism is for configuration three, and three cutting mechanisms are along the circumferential equal of the drive rodEven distribution.
Further, the drive rod includes the body of rod and the knock-off joint that is fixedly connected on the tool apron, the body of rodIt is connected on the knock-off joint.
Further, the rotation axis of the knife rest is parallel to the rotation axis of the drive rod.
Further, the knife rest includes upper clamp plate and lower clamp plate, and the blade is clamped in the upper clamp plate and describedBetween lower clamp plate.
Further, the blade is rounded.
Further, the blade is in discount vibram outlet shape.
The beneficial effects of the utility model are embodied in:
The utility model transmits kinetic energy with drive rod and is cut by the means of centrifugal action from the inside of drilling rod, knifePiece can be bonded drilling rod tube wall with the going deep into voluntarily adjusting position of cutting always, and not only cutting efficiency is high, and effect is reliable, andAnd can easily be protruded into drilling rod after cutting mechanism gathering, it does not need to follow blade to protrude into drilling rod power source yet, as long asGround drives drive rod rotation, and it is very convenient to operate, and terrestrial operation is implemented without security risk.
The utility model is applicable to bit freezing when depth is more than the pile foundation construction of 60m, and the drilling rod in hole is cut off and then mentionedIt drills out, it is ensured that cover the smooth implementation of brill, release probe stone bit freezing constraint to be last, successfully drill bit proposition is laid a good foundation.
The utility model is applicable to drilling rod machine cuts in deep hole mud, and certainly, the utility model is applicable not only to existingThere is the drilling rod that technology is mentioned, the utility model can be used in the cutting of the tubuloses such as drilling rod, casing under other deep hole environment.
Detailed description of the invention
Fig. 1 is the usage state diagram (vertical profile) of an embodiment of the present invention.
Fig. 2 is the usage state diagram (vertical view) of an embodiment of the present invention.
The label of each component in attached drawing are as follows: 11 bodies of rod, 21 circular base slabs, 22Y shape linking rib, press from both sides on 31 12 knock-off jointsPlate, 32 lower clamp plates, 4 blades, 5 drilling rods.
Specific embodiment
It is described in detail the utility model below with reference to the accompanying drawings.It should be noted that in the absence of conflict, this ShenPlease in embodiment and embodiment in feature can be combined with each other.
Referring to Fig. 1 and Fig. 2.
The utility model pipe internal cutting device, including drive rod, tool apron and more than one cutting mechanism, the cuttingMechanism includes tool holder and blade 4；The drive rod is fixedly connected on the tool apron to be used to that the tool apron to be driven to rotate, describedKnife rest eccentric rotary is mounted on the tool apron, and the blade 4 is fixedly connected on the knife rest；
Under rounding state, the blade 4 of the blade holder turns to the knife rest and thereon outward without departing from the tool apron,Under cut state, by tool apron described in the drive rod rotation, the knife rest turns to institute thereon under the influence of centrifugal forceBlade 4 is stated outward beyond the tool apron.
In use, first collapsing cutting mechanism in knife rest, (i.e. the blade of blade holder turns to knife rest and thereon does not surpass outwardTool apron out), then tool apron is transferred from by cutting drilling rod inner cavity to design cutting part by manipulation drive rod, high speed is revolved laterTurn drive rod, cutting mechanism is thrown away that (i.e. the blade that turns under the influence of centrifugal force thereon of knife rest is outside by centrifugal force effectBeyond tool apron), blade contact forms friction with by cutting drill pipe wall, is bored by friction cuttings to by cutting drill pipe wallBar, and the part that blade exceeds tool apron outward deeply can voluntarily expand fitting drilling rod tube wall always with cutting outward,Finally drilling rod is cut off.
The working principle of cutting mechanism in order to facilitate understanding, in Fig. 2, the cutting mechanism on right side is shown as blade cutting drilling rodThe state of tube wall, the cutting mechanism of upper left are shown as the state of blade cutting drill pipe wall, and lower-left is shown as cutting mechanism gatheringState.
In one embodiment, the tool apron includes two pieces of circular base slabs 21 that are symmetrical and being spaced apart, described to cutCutting mill structure is arranged between two pieces of circular base slabs 21, and the drive rod is fixedly connected on one of circular supportThe outer surface center of plate 21.This design, structurally reasonable, cutting mechanism can collapse between two pieces of circular base slabs, obtainEffective protection, and conveniently moved up and down in drilling rod, practicability is preferable.
In one embodiment, the tool apron further includes the Y shape linking rib being connected between two pieces of circular base slabs 2122.For Y shape linking rib for two pieces of circular base slab intervals to link together, structure is more stable, reliable, while again will notSpace too many between the two is occupied, retains enough installation spaces for cutting mechanism.
In one embodiment, the cutting mechanism is for configuration three, week of three cutting mechanisms along the drive rodTo being uniformly distributed.It designs in this way, structurally reasonable, cutting efficiency is higher, and effect is more preferable.
Preferably, three cutting mechanisms are located in three angles of Y shape linking rib 22.Structure is more stable,Reliably.
In one embodiment, the drive rod includes the body of rod 11 and the knock-off joint being fixedly connected on the tool apron 12,The body of rod 11 is connected on the knock-off joint 12.It designs in this way, more can need to dismount the body of rod, practicability is more preferable.
In one embodiment, the knife rest includes upper clamp plate 31 and lower clamp plate 32, and the blade 4 is clamped in the upper folderBetween plate 31 and the lower clamp plate 32.In this way design, structure is stronger, and have dismountable function, it is easy to repair moreIt changes.
In one embodiment, the blade 4 is rounded.It designs in this way, regardless of the angle of blade, can guarantee and boreRod tube wall is effectively bonded and is cut.
In one embodiment, the blade 4 is in discount vibram outlet shape.It designs in this way, effect is same as above, and the part of missing is for stepping downY shape is connected the structures such as rib.
In one embodiment, the rotation axis of the knife rest is parallel to the rotation axis of the drive rod, the blade perpendicular toThe rotation axis of the drive rod.It designs in this way, structure is more reasonable, and cutting effect is more preferable.
It should be understood that example as described herein and embodiment are not intended to limit the utility model only for explanation, thisField technical staff can make various modifications or variation according to it, within the spirit and principle of the utility model, madeAny modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this utility model.