CN210714523U - Drilling machine assembly for under-stroke up-down drill rod - Google Patents

Abstract

The utility model discloses a rig assembly for owe drilling rod about stroke, but including the frame, lateral sliding installs and be used for driving transmission drilling rod pivoted unit head, install the transmission drilling rod in the unit head in the frame, install the chuck that is used for the centre gripping or loosens transmission drilling rod in order to realize power connection or interrupt in the unit head tip, its characterized in that: the power head is driven by a horizontal driving device to slide transversely; the utility model discloses a main holder and vice holder press from both sides tightly, loosen the cooperation and combine the lateral sliding of unit head, can be so that this rig can carry out the operation of drilling rod and lower drilling rod under the operating mode that drilling rod length is greater than unit head propulsion stroke, after drilling rod length becomes long, need not redesign and change the rig, this rig economic nature is good, efficient.

Description

Drilling machine assembly for under-stroke up-down drill rod

Technical Field

The utility model relates to a colliery rig technical field, in particular to a rig assembly for owe stroke upper and lower drilling rod.

Background

The drill rods used by the coal mine drilling machine are usually connected by threads, and the process of adding the drill rods to the drilling axis of the drilling machine or taking the drill rods out of the drilling axis and completing corresponding threaded connection and disassembly is a very important process in the drilling process.

When the existing drilling machine is designed, the propelling stroke of a power head of the drilling machine must be larger than the length of a drill rod, and the drill rod can be installed in the drilling machine to be used for drilling. In the process of drilling up and down, a drill rod needs to be manually held to screw in threads, the drill rod needs to be in contact with a drilling machine for a long time, and the safety is poor.

The drilling machine assembly for the under-travel upper and lower drill rods is provided for solving the problems, the drilling machine can carry out the operation of the upper drill rod and the lower drill rod under the working condition that the length of the drill rod is larger than the propelling travel of the power head, the drilling machine does not need to be redesigned and replaced after the length of the drill rod is lengthened, and the drilling machine is good in economy and high in efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a rig assembly for owe stroke upper and lower drilling rod, this rig can carry out the operation of going up drilling rod and lower drilling rod under the operating mode that drilling rod length is greater than the unit head and impels the stroke, after drilling rod length becomes long, need not redesign and change the rig, this rig economic nature is good, efficient.

The utility model discloses a rig assembly for owe drilling rod about stroke, but including frame, lateral sliding install be used for driving transmission drilling rod pivoted unit head in the frame, install transmission drilling rod in the unit head, with the water swivel that the drilling rod is connected, install in the unit head tip be used for the centre gripping or loosen the chuck that transmission drilling rod connects or breaks off in order to realize power, its characterized in that: install the main gripper who is used for the downthehole drilling rod of centre gripping or treats the operation drilling rod in the frame and be used for the centre gripping to treat the vice gripper of operation drilling rod, vice gripper is located between main gripper and the chuck, the transmission drilling rod passes through its relative unit head lateral sliding of drilling rod horizontal drive, the unit head passes through its relative frame lateral sliding of unit head horizontal drive.

Further, the auxiliary gripper comprises an auxiliary gripper base arranged on the frame, a pair of slips longitudinally and symmetrically arranged on the auxiliary gripper base, and an auxiliary gripper driving device for driving the slips to longitudinally slide.

Furthermore, a limiting ring is fixedly connected to the transmission drill rod and used for abutting against one end, far away from the chuck, of the power head so as to limit the transverse moving distance of the transmission drill rod.

Furthermore, a clamping groove is transversely formed in the middle of the auxiliary clamp holder base, mounting holes penetrating through the outer side wall of the auxiliary clamp holder base are longitudinally formed in the two longitudinal sides of the clamping groove, and the slips are mounted in the mounting holes and driven to longitudinally slide through the auxiliary clamp holder driving device.

Further, the opposite sides of the pair of slip are arc structures matched with the excircle of the drill rod.

Furthermore, an anti-slip groove is axially formed in the arc surface of the slip.

Further, drilling rod horizontal drive device includes the pneumatic cylinder and articulates the fixing base on the pneumatic cylinder output shaft, the fixing base is fixed in on the power head, the pneumatic cylinder body articulates on the water swivel.

Further, the main holder is mounted on the main holder mounting seat, the main holder mounting seat comprises a horizontal mounting plate fixedly connected with the main holder, a support frame connected to the bottom of the mounting plate, and a connecting plate connected to the side of the support frame and extending vertically, and the connecting plate is connected to one transverse end of the rack.

Furthermore, an adjusting plate is further arranged between the supporting frame and the mounting plate and fixedly connected to the supporting frame and the mounting plate.

Furthermore, the connecting plate and the adjusting plate are provided with operating windows.

The utility model has the advantages that:

the utility model discloses a main holder and vice holder press from both sides tightly, loosen the cooperation and combine the lateral sliding of unit head, can make this rig carry out the operation of going up drilling rod and lower drilling rod under the operating mode that drilling rod length is greater than the unit head and impels the stroke, after drilling rod length becomes long, need not redesign and change the rig, this rig economic nature is good, efficient; the clamping and loosening operation of the auxiliary clamp are combined, the drill rod is only required to be placed into or taken out of the drilling machine manually, the drill rod does not need to be screwed manually, the manual operation amount is reduced, the drill structure can be taken out of the middle position of the drilling machine in parallel to be operated, the drill rod or a water braid does not need to be taken out from the rear of a power head, and the safety is better.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic diagram of a drill-up structure of a conventional drilling machine;

FIG. 2 is a schematic view of a prior art drill rig drill-down configuration;

FIG. 3 is a schematic view of the structure of the drilling machine of the present invention;

FIG. 4 is a schematic top view of the structure of FIG. 3;

FIG. 5 is a schematic view of the construction of the sub-holder;

FIG. 6 is a schematic structural view of a drill rod horizontal driving device;

FIG. 7 is a schematic view of the structure of the driving drill rod;

FIG. 8 is a schematic view of a main holder mount;

FIG. 9 is a schematic view of the structure I-I of FIG. 8;

fig. 10 is a schematic view of the structure of the upper drill of the present invention;

FIG. 11 is a schematic view of the structure of the present invention;

Detailed Description

FIG. 1 is a schematic diagram of a drill-up structure of a conventional drilling machine; FIG. 2 is a schematic view of a prior art drill rig drill-down configuration; FIG. 3 is a schematic view of the structure of the drilling machine of the present invention; FIG. 4 is a schematic top view of the structure of FIG. 3; FIG. 5 is a schematic view of the construction of the sub-holder; FIG. 6 is a schematic structural view of a drill rod horizontal driving device; FIG. 7 is a schematic view of the structure of the driving drill rod; FIG. 8 is a schematic view of a main holder mount; FIG. 9 is a schematic view of the structure I-I of FIG. 8; fig. 10 is a schematic view of the structure of the upper drill of the present invention; FIG. 11 is a schematic view of the structure of the present invention;

referring to fig. 1 and 2, the conventional drilling machine includes a frame 1, a power head 2, a chuck 3, a drive rod 4, a main gripper 5, a horizontal driving device of the power head, and other components, and the conventional drilling machine only has the main gripper and does not have an auxiliary gripper; the drilling machine is provided with only one set of horizontal driving device, namely a power head horizontal driving device, and the power head horizontal driving device is used for driving the power head to horizontally slide along the rack;

as shown in fig. 1, the basic steps of using the existing drilling machine to feed the drill rod from between the chuck and the main holder are as follows:

s1: fig. 1(a) shows an initial state of the drilling machine, in which the main holder clamps the drill rod 13 in the hole, and the chuck clamps the transmission drill rod 3, wherein the water braid is connected to the transmission drill rod, the power head is located at the extreme end of the propulsion stroke, i.e., the extreme right end in the drawing, assuming that the maximum propulsion stroke of the propulsion hydraulic cylinder of the horizontal driving device of the power head is S, the length of the male joint of the drill rod is a, and the length of the drill rod 14 to be operated is L'.

S2: as shown in fig. 1(a), a drill rod to be operated is manually placed between the chuck and the main holder, and the female thread at the right end of the drill rod to be operated is manually screwed into the male thread of the transmission drill rod as much as possible.

S3: as shown in fig. 1(b), the power head drives the transmission drill rod to rotate forward and move forward S' left under the driving of the horizontal driving device of the power head until the threads at the two ends of the drill rod to be operated are respectively screwed with the transmission drill rod and the drill rod in the hole.

S4: as shown in fig. 1(c), the main holder is released, and the drill normally drills for a stroke S ", S" + S ═ S.

S5: as shown in fig. 1(d), after completing the drilling of one propulsion stroke, the main gripper clamps the drill rod to be operated again, at this time, the drill rod to be operated moves inwards to become an in-hole drill rod in the next propulsion stroke, the chuck keeps clamping, the power head rotates reversely and retreats rightwards, so that the threaded connection between the transmission drill rod and the in-hole drill rod is loosened, the power head returns rightwards to the tail end of the propulsion stroke, and the drill rod to be operated is waited to be put into the drill-up of the next drill rod to be operated.

As can be seen from FIG. 1, the advance stroke S of the drill must satisfy S ≧ L' + a, otherwise the drill rod cannot be placed between the chuck and the main holder

The length of the space between the chuck and the main holder, b, and S-b + a,

therefore, when the power head is moved to the extreme end of the propulsion stroke to the right, the length b of the space between the chuck and the main holder must be b ≧ L ', or the next drill rod of the same length L' cannot be loaded into the drilling axis.

Therefore, the drilling machine can meet the conditions during design; when the length of the drill rod is larger than the stroke of the drilling machine, the drilling machine can not be used obviously, and the condition is called as 'under stroke'; when a longer drill rod needs to be used, the stroke of the drilling machine needs to be lengthened, and the drilling machine needs to be redesigned and manufactured, so that the economy is poor, and the efficiency is low; in addition, in the step S2, the drill rod to be operated needs to be manually held to screw in the thread, so that the drill rod needs to be in contact with the drilling machine for a long time, and the safety is poor;

as shown in fig. 2, the basic steps of using the existing drilling machine to drop the drill rod between the slave chuck and the master holder are as follows:

s1: as shown in fig. 2(a), in an initial state of lowering a drill rod, the main holder clamps the drill rod in the hole, the drill rod in the hole clamped by the main holder is the drill rod to be disassembled, namely the drill rod to be operated, the chuck clamps the transmission drill rod, the water braid is connected with the transmission drill rod, and the power head is located at the leftmost end of the propelling stroke;

s2: as shown in fig. 2(b), the main holder loosens the drill rod to be disassembled, the chuck keeps clamping, the power head retreats and drags the drill rod to be disassembled and the drill rod in other holes to retreat for a distance c, so that the chuck can clamp the drill rod to be disassembled after the transmission drill rod is disassembled;

s3: as shown in fig. 2(c), the main holder clamps the drill rod to be disassembled, the chuck keeps clamping, the power head reverses and retreats, and the thread between the transmission drill rod and the drill rod to be disassembled is loosened;

s4: loosening the transmission drill rod by the chuck, and manually drawing out the transmission drill rod and the water swivel from the rear end of the power head;

s5: as shown in fig. 2(d), the power head advances to the left and the chuck clamps the drill rod to be disassembled;

s6: as shown in fig. 2(e), the main gripper loosens the drill rod to be dismounted, the chuck keeps clamping the drill rod to be dismounted, the power head retreats and drags the drill rod to be dismounted and the drill rod in the other hole for a retreating distance d, d is not more than S-a, so that sufficient space can be ensured for dismounting the thread of the drill rod to be dismounted and the previous drill rod, at the moment, the drill rod to be dismounted is positioned on the right side of the main gripper, and the drill rod in the hole connected with the left end of the drill rod to be dismounted is positioned in;

s7: as shown in fig. 2(f), the main gripper clamps the drill rod in the hole connected with the left end of the drill rod to be disassembled, the chuck clamps the right end of the drill rod to be operated, the power head rotates reversely and retreats by a distance a, and the threaded connection between the drill rod in the hole and the drill rod to be operated is completely loosened;

s8: the drill rod to be disassembled is loosened by the chuck, and the drill rod to be disassembled is manually taken out;

s9: and the power head moves forward by a stroke S and returns to the foremost end leftwards, the drill rod in the hole at the moment is the drill rod to be disassembled in the next disassembling stroke, and the chuck clamps the drill rod to be disassembled at the moment to prepare for the next drilling rod descending circulation.

As can be seen from fig. 2(f), after the thread of the drill rod is completely loosened, the space for taking out the drill rod from the middle is actually insufficient, and the drill rod can be taken out only by tilting; the space in the middle tends to be reduced one by one along with the drilling process, the drill rod cannot be taken out even if the drill rod is inclined after a plurality of drill rods are disassembled, and the drill rod to be disassembled is clamped by the power head to be pushed into the hole for a certain distance, so that the space can be ensured to continuously meet the requirement for taking out the drill rod;

in step S4, the transmission drill rod and the water swivel need to be manually taken out from the rear of the power head, and at this time, the transmission drill rod and the water swivel are likely to slip out of the loosened chuck to hurt people, and especially, when drilling at a positive inclination angle, namely when drilling at a high left and a low right inclined angle by the illustrated drilling machine, the drilling machine also has a great potential safety hazard;

based on the technical problems of the existing drilling machine in the process of drilling up and down, as shown in fig. 3 to 9, the embodiment provides a drilling machine assembly for under-travel up and down drill rods, which comprises a frame 1, a power head 2 which is transversely slidably mounted on the frame and is used for driving a transmission drill rod to rotate, a transmission drill rod 3 mounted in the power head, a water braid 10 connected to the tail of the transmission drill rod, a chuck 4 mounted at the end of the power head and used for clamping or loosening the transmission drill rod to realize power connection or disconnection, a main holder 5 for holding a drill rod in the hole or a drill rod to be operated and an auxiliary holder 6 for holding a drill rod to be operated are mounted on the frame, the auxiliary gripper is positioned between the main gripper and the chuck, the transmission drill rod is driven by the drill rod horizontal driving device 7 to transversely slide relative to the power head, and the power head is driven by the power head horizontal driving device to transversely slide relative to the rack; referring to fig. 3, the horizontal direction is the left-right direction in fig. 3, the longitudinal direction is perpendicular to the horizontal direction, the same as the front-back direction in fig. 3, and the vertical direction is the up-down direction; the power head, the chuck, the main holder and the water swivel all adopt the existing structures, and detailed description is omitted; the drilling machine is provided with two sets of horizontal driving systems, wherein one set is a power head horizontal driving device, the other set is a drill rod horizontal driving device 7, the power head horizontal driving device is used for driving the power head to horizontally slide along a rack, the power head horizontal driving device is driven by a hydraulic cylinder, a cylinder body of the hydraulic cylinder is connected to the rack, a power output end is connected to the power head, the drill rod horizontal driving device is used for driving a transmission drill rod to horizontally slide relative to the power head, the drill rod horizontal driving device is connected between the power head and a water braid, the water braid can be driven to drive the transmission drill rod to transversely slide relative to the power head, and when the chuck loosens the transmission drill rod, the transmission drill rod can be driven by the drill rod horizontal; the drill rod to be operated is a drill rod to be lifted or a drill rod to be lowered; the drilling machine can carry out the operation of loading a drill rod and unloading the drill rod under the working condition that the length of the drill rod is greater than the propelling stroke of the power head by clamping and loosening the main clamp and the auxiliary clamp and combining the transverse sliding of the power head, the drilling machine does not need to be redesigned and replaced after the length of the drill rod is lengthened, and the drilling machine is good in economy and high in efficiency; the clamping and loosening operation of the auxiliary clamp are combined, the drill rod is only required to be placed into or taken out of the drilling machine manually, the drill rod does not need to be screwed manually, the manual operation amount is reduced, the drill structure can be taken out of the middle position of the drilling machine in parallel to be operated, the drill rod or a water braid does not need to be taken out from the rear of a power head, and the safety is better.

In this embodiment, the sub-gripper 6 comprises a sub-gripper base 6a mounted on the frame, a pair of slips 6b longitudinally symmetrically mounted on the sub-gripper base, and a sub-gripper driving device 6c for driving the slips to slide longitudinally; in this embodiment, a pair of auxiliary gripper driving devices is symmetrically installed on the auxiliary gripper and used for driving two slips respectively, the auxiliary gripper driving device of this embodiment adopts a hydraulic cylinder, and two output ends of the hydraulic cylinder are connected to the slips and drive the slips to slide longitudinally to form a gripping or releasing state.

In this embodiment, the driving drill rod 3 is fixedly connected with a limiting ring 8, and the limiting ring is used for abutting against one end of the power head 2, which is far away from the chuck, so as to limit the transverse moving distance of the driving drill rod; when the transmission drill rod moves to the limit position leftwards relative to the power head, the limiting ring abuts against the right end portion of the power head to limit further leftward movement of the transmission drill rod relative to the power head, the limiting ring can limit the transverse running distance of the transmission drill rod, damage or safety accidents of a drilling machine caused by forward excessive movement of the transmission drill rod are prevented, and the relative position of the limiting ring and the power head needs to be matched with the pushing stroke of the drill rod horizontal driving device.

In the embodiment, the middle part of the auxiliary holder base is transversely provided with a clamping groove 6d, two longitudinal sides of the clamping groove are longitudinally provided with mounting holes penetrating through the outer side wall of the auxiliary holder base, and the slips 6b are mounted in the mounting holes and driven to longitudinally slide by the auxiliary holder driving device; the auxiliary holder driving device is fixedly connected to the longitudinal side wall of the auxiliary holder base, the driving end extends into the mounting hole and is connected with the slips, the cross section of the mounting hole is matched with the outer contour shape of the slips, the cross section of the mounting hole is circular in the embodiment, the slips are of a cylindrical structure, and the mounting hole is used for guiding the slips in a sliding mode, so that the running accuracy and stability of the slips are improved; the main holder can use the existing holder structure and can also have the same structure as the auxiliary holder structure, and detailed description is omitted;

in this embodiment, the opposite sides of the pair of slip are arc structures matched with the outer circle of the drill rod; the contact surface with the drill rod to be operated is increased through the arc structure, and the clamping effect is improved;

in the embodiment, an anti-slip groove 6e is axially formed in the arc surface of the slip; the anti-slip groove is of a groove body structure with a triangular cross section, and the cross section of the anti-slip groove can be of other shapes, so that the clamping stability of the auxiliary clamping device is further improved through the structure;

in this embodiment, the drill rod horizontal driving device comprises a hydraulic cylinder 7a and a fixed seat 7b hinged to an output shaft of the hydraulic cylinder, the fixed seat is fixed on the power head, and a cylinder body of the hydraulic cylinder is hinged to the water braid; the fixed seat 7b is fixed at the rightmost end of the power head, namely one end far away from the chuck, the cylinder body of the hydraulic cylinder is hinged to a water swivel seat 7c, the water swivel seat 7c is fixed on a water swivel 10, the drill rod horizontal driving device is used for adjusting the relative position of a transmission drill rod and the power head, when the drill rod horizontal driving device works, the chuck is loosened, the transmission drill rod is pushed by the hydraulic cylinder 7a to transversely slide relative to the power head so as to adjust the length of the transmission drill rod extending out of the chuck, and the hydraulic cylinder 7a has a floating function in the retracting and extending directions, namely can self-adaptively extend under the action of external force with certain magnitude under the condition of no hydraulic;

in this embodiment, the main gripper is mounted on a main gripper mounting seat 9, the main gripper mounting seat 9 includes a horizontal mounting plate 9a for being fixedly connected with the main gripper, a supporting frame 9b connected to the bottom of the mounting plate, and a connecting plate 9c connected to the side of the supporting frame and extending vertically, and the connecting plate is connected to one transverse end of the rack; as shown in fig. 1, the main gripper mounting seat is connected to the left end of the rack, wherein the left end of the rack is connected with the gripper mounting plate 12, the connecting plate 9c is connected to the gripper mounting plate 12 through two groups of bolts arranged up and down, wherein each group of bolts comprises three bolts arranged horizontally and longitudinally, and the main gripper is an extension of the rack, so as to expand the space of an upper drill rod between the gripper and the chuck; the supporting frames 9b are two channel steel structures which are longitudinally and symmetrically connected to the bottom of the horizontal mounting plate, the opening ends of the channel steels are connected with supporting plates 9f, and the structural strength of the supporting frames is improved through the supporting plates; the auxiliary gripper is mounted on the auxiliary gripper mounting seat 11, the auxiliary gripper mounting seat 11 is composed of a support leg fixed on the support and a mounting frame mounted on the support leg, which is not described in detail specifically, and the mounting height of the auxiliary gripper is adjusted by the auxiliary gripper mounting seat;

in this embodiment, an adjusting plate 9d is further arranged between the support frame and the mounting plate, and the adjusting plate is fixedly connected to the support frame and the mounting plate; the height of the mounting seat of the main holder can be adjusted by replacing the adjusting plate with different thickness, so that the central axis of the main holder is adjusted;

in this embodiment, the connecting plate and the adjusting plate are provided with an operating window 9 e; the operation window is in a rectangular open pore structure, so that manual installation and operation are facilitated;

as shown in fig. 10, the basic steps of using the drill rig of the present invention to load a drill rod between the slave chuck and the master holder are as follows:

s1: as shown in fig. 10(a), in the initial state of the drilling machine, the main clamp clamps the drill rod in the hole, the chuck clamps the transmission drill rod, and the auxiliary clamp is released; putting a drill rod to be operated on the auxiliary holder and between the chuck and the main holder, wherein the front end of the drill rod to be operated is arranged in the auxiliary holder; the water braid is connected with a transmission drill rod, the total propulsion stroke of a hydraulic cylinder of the drill rod horizontal driving device is Sg, and the hydraulic cylinder extends out of Sg ', wherein Sg' is less than Sg, and the threaded joint of the transmission drill rod is just exposed out of the chuck; the power head is positioned at the tail end of the right side of the propelling stroke; assuming that a power head horizontal driving device pushes a hydraulic cylinder to have a propelling stroke S, the total length L of a drill rod to be operated is greater than S, the length of a male joint of the drill rod is a, and the space allowance k between a chuck and a main holder is k;

s2: as shown in fig. 10(b), the main holder clamps the drill rod in the hole, the chuck clamps the transmission drill rod, the auxiliary holder clamps the drill rod to be operated, and the power head drives the transmission drill rod to rotate forward and move forward a leftward under the driving of the pushing hydraulic cylinder of the horizontal driving device of the power head until the female thread at the rear end of the drill rod to be operated is screwed with the male thread at the left end of the transmission drill rod;

s3: as shown in fig. 10(c), the main gripper clamps the drill rod in the hole, the chuck clamps the transmission drill rod, the auxiliary gripper loosens the drill rod to be operated, and the horizontal driving device of the power head pushes the hydraulic cylinder to push the power head to drive the drill rod to be operated to rotate forward while advancing by a distance S1 which is k + a until the male thread at the left end of the drill rod to be operated is screwed with the female thread at the right end of the drill rod in the hole;

s4: as shown in fig. 10(d), the main gripper and the auxiliary gripper are released, the chuck is kept clamped, and the power head horizontal driving device pushes the hydraulic cylinder to advance the residual stroke S2-S1, so that the drill rod part to be operated enters the drill hole;

s5: as shown in fig. 10(e), the main gripper clamps the drill rod to be operated, the auxiliary gripper and the chuck are loosened, the transmission drill rod and the drill rod to be operated are clamped and fixed by the main gripper, the hydraulic cylinder of the horizontal driving device of the power head pushes the power head to retreat by a distance Sg 'relative to the transmission drill rod, the hydraulic cylinder of the horizontal driving device of the drill rod floats under the action of the retreating force of the power head to retract into the Sg', and meanwhile, due to the clamping and fixing of the main gripper on the transmission drill rod, the distance of the left end of the transmission drill rod extending out of the power;

s6: as shown in fig. 10(f), the main gripper is loosened, the chuck is clamped, the auxiliary gripper maintains the loosened state, and the horizontal driving device of the power head pushes the hydraulic cylinder to drive the power head to drill a distance Sg' leftward, so that drilling of a drill rod with the length of L is completed;

s7: as shown in fig. 10(g), at this time, the drill rod to be operated is fed into the hole to form the drill rod in the hole with the next drilling stroke, the main holder clamps the drill rod in the hole, the chuck clamps the transmission drill rod, the auxiliary holder is loosened, the power head rotates reversely and retreats, and the threaded connection between the transmission drill rod and the drill rod in the hole is loosened; the power head returns to the tail end of the propelling stroke rightwards to wait for placing the next drill rod to be operated; and then the hydraulic cylinder of the drill rod horizontal driving device retracts by Sg 'so that the transmission drill rod retracts to the distance of Sg' in the chuck, and at the moment, the transmission drill rod only exposes the joint.

As can be seen from fig. 10, the advance stroke S is less than the drill rod length L, so that the drilling machine completes the feeding of the drill rod with the length L in the case of under-stroke;

as can be seen from the above steps, the expansion length Sg 'of the hydraulic cylinder of the horizontal driving device during the drill rod feeding process has a fixed value range, and the minimum value of the expansion length Sg' is obtained by the above formula;

as shown in fig. 11, the basic steps of using the drill rig to drop a drill rod between the slave chuck and the master holder are as follows:

s1: as shown in fig. 11(a), in an initial state of the drilling machine, the main holder clamps the drill rod in the hole, the drill rod in the hole is the drill rod to be operated at the moment, the chuck clamps the transmission drill rod, and the auxiliary holder is released; the water braid is connected with the transmission drill rod, and the power head is positioned at the leftmost end of the propelling stroke; the drill rod clamped by the main clamping device at the moment is called a drill rod to be operated;

s2: as shown in fig. 11(b), the main gripper and the auxiliary gripper are loosened, the chuck keeps clamping the transmission drill rod, the power head moves backwards by a stroke S of the pushing hydraulic cylinder to reach the rightmost end of the stroke, and the drill rod to be operated and the drill rod in the rest hole are pulled backwards out S;

s3: as shown in fig. 11(c), the main holder is kept clamped, the auxiliary holder is released, the chuck is kept released, the hydraulic cylinder of the horizontal driving device for the drill rod is in a floating position, at this time, the drill rod to be operated and the transmission drill rod are clamped and fixed by the main holder, the hydraulic cylinder of the horizontal driving device for the power head drives the power head to move forward by a hydraulic cylinder stroke Sg relative to the drill rod to be operated, so that the transmission drill rod retracts into the chuck Sg, wherein Sg is greater than or equal to Sg '+ a, for convenience of describing S ═ Sg' + a in this embodiment, the threaded connection between the transmission drill rod and the drill rod to be operated is located in the chuck, that is, the transmission drill rod and the drill rod to be operated can;

s4: as shown in fig. 11(d), the main gripper and the auxiliary gripper are loosened, the chuck is clamped, the power head is driven by the horizontal driving device of the power head to move backwards (S3), so that the transmission drill rod, the drill rod to be operated and the drill rod in the hole are synchronously moved rightwards, and the threaded connection of the drill rod to be operated and the drill rod in the hole connected with the left end is arranged between the main gripper and the auxiliary gripper;

s5: as shown in fig. 11(e), the main gripper is clamped, the auxiliary gripper is loosened, the chuck clamps the transmission drill rod, the power head drives the drill rod to be operated to reverse, and the drill rod to be operated retreats by a distance a under the driving of a pushing hydraulic cylinder of a horizontal driving device of the power head, so that the drill rod to be operated is separated from the threaded connection part of the drill rod in the hole;

s6: as shown in fig. 11(f), the main holder clamps the drill rod in the hole, the auxiliary holder clamps the drill rod to be operated, the drill rod to be operated and the transmission drill rod are clamped and fixed by the auxiliary holder, the chuck is loosened, the hydraulic cylinder of the horizontal driving device of the power head drives the power head to move backward a relative to the drill rod to be operated, so that the transmission drill rod extends out of the chuck and is exposed out of the a, and the threaded connection between the transmission drill rod and the drill rod to be operated is positioned outside the chuck;

s7: as shown in fig. 11(g), the main holder clamps the drill rod in the hole, the auxiliary holder clamps the drill rod to be operated, the chuck clamps the transmission drill rod, the power head reverses and retreats for a distance a at the same time, and the threaded connection part of the drill rod to be operated and the transmission drill rod is disconnected;

s8: as shown in fig. 11(h), the auxiliary clamping device is loosened, the drill rod to be operated is taken out, the chuck is loosened, the hydraulic cylinder of the drill rod horizontal driving device retracts to Sg ', so that the exposed section of the transmission drill rod is increased by Sg', and then the chuck is kept clamped to prepare for the next drill rod circulation;

according to the conditions of an upper drill rod and a lower drill rod, the stroke Sg of a hydraulic cylinder of the power head horizontal driving device is more than or equal to Sg' + a, and S3 is less than or equal to Sg-3 a;

can know by figure 11, adopt the utility model discloses rig after the device optimization is under the condition that does not change drilling rod horizontal drive arrangement propulsion hydraulic cylinder stroke, still can realize middle upper and lower drilling rod earlier in owing the stroke operating mode, and the position of treating the operation drilling rod around and does not change, and the space between chuck and main holder does not have the trend that reduces.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. The utility model provides a rig assembly for owe stroke upper and lower drilling rod, includes the frame, but lateral sliding installs and be used for driving transmission drilling rod pivoted unit head, install the transmission drilling rod in the unit head, the water swivel of being connected with the drilling rod, install the chuck that the unit head tip is used for the centre gripping or loosens the transmission drilling rod in order to realize power connection or interrupt, its characterized in that: install the main gripper who is used for the downthehole drilling rod of centre gripping or treats the operation drilling rod in the frame and be used for the centre gripping to treat the vice gripper of operation drilling rod, vice gripper is located between main gripper and the chuck, the transmission drilling rod passes through its relative unit head lateral sliding of drilling rod horizontal drive, the unit head passes through its relative frame lateral sliding of unit head horizontal drive.

2. The drill assembly for under-stroking upper and lower drill pipes of claim 1, wherein: the auxiliary gripper comprises an auxiliary gripper base arranged on the frame, a pair of slips longitudinally and symmetrically arranged on the auxiliary gripper base and an auxiliary gripper driving device for driving the slips to longitudinally slide.

3. The drill assembly for under-stroking upper and lower drill pipes of claim 1, wherein: the transmission drill rod is fixedly connected with a limiting ring, and the limiting ring is used for abutting against one end, far away from the chuck, of the power head so as to limit the transverse moving distance of the transmission drill rod.

4. The drill assembly for under-stroking upper and lower drill pipes of claim 2, wherein: the auxiliary clamp holder is characterized in that a clamping groove is transversely formed in the middle of the auxiliary clamp holder base, mounting holes penetrating through the outer side wall of the auxiliary clamp holder base are longitudinally formed in the longitudinal two sides of the clamping groove, and the slips are mounted in the mounting holes and driven to longitudinally slide through an auxiliary clamp holder driving device.

5. The drill assembly for under-stroking upper and lower drill pipes of claim 2, wherein: the opposite sides of the pair of slips are arc structures matched with the excircle of the drill rod.

6. The drill assembly for under-stroking upper and lower drill pipes of claim 5, wherein: and an anti-slip groove is axially formed in the arc surface of the slip.

7. The drill assembly for under-stroking upper and lower drill pipes of claim 1, wherein: the drill rod horizontal driving device comprises a hydraulic cylinder and a fixing seat hinged to an output shaft of the hydraulic cylinder, the fixing seat is fixed on the power head, and a cylinder body of the hydraulic cylinder is hinged to the water swivel.

8. The drill assembly for under-stroking upper and lower drill pipes of claim 1, wherein: the main clamping device is installed on the main clamping device installing seat, the main clamping device installing seat comprises a horizontal installing plate, a supporting frame and a connecting plate, the horizontal installing plate is used for being fixedly connected with the main clamping device, the supporting frame is connected to the bottom of the installing plate, the connecting plate is connected to the side portion of the supporting frame and extends vertically, and the connecting plate is connected to one transverse end of the rack.

9. The drill assembly for under-stroking upper and lower drill pipes of claim 8, wherein: still be provided with the regulating plate between support frame and the mounting panel, the regulating plate links firmly on support frame and mounting panel.

10. The drill assembly for under-stroking upper and lower drill pipes of claim 9, wherein: and the connecting plate and the adjusting plate are provided with operating windows.

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