CN216240498U - Jaw-type drill rod disassembling and assembling pliers - Google Patents

Abstract

The utility model discloses jaw type drill rod disassembling and assembling pliers which comprise a slewing bearing, a telescopic arm, calipers, a friction driving device and the like. The slewing bearing comprises a base and a slewing body. The revolving body is in running fit with the base; one end of the telescopic arm is connected with the revolving body and is driven by an oil cylinder to do one-stage or multi-stage telescopic motion; the caliper comprises a static caliper claw, a movable caliper claw and a clamping oil cylinder. The static clamp claw is connected with the other end of the telescopic arm and is horizontally arranged in a clamp shape with the movable clamp claw. The clamping oil cylinder is arranged in the static gripper; the friction driving device comprises friction wheels, a hydraulic motor, a speed reducer and the like, is divided into two groups, is symmetrically distributed relative to the telescopic arm, and is respectively connected with the static clamp claw and the movable clamp claw. The friction wheel is driven to rotate by the hydraulic motor. The hydraulic motor is provided with a hydraulic pressure source by a hydraulic system. The jaw type drill rod disassembling and assembling clamp has large driving torque and can meet the requirement of disassembling a large jaw type drill rod joint.

Description

Jaw-type drill rod disassembling and assembling pliers

Technical Field

The utility model belongs to the technical field of large engineering drillers, and particularly relates to jaw-type drill rod disassembling and assembling pliers.

Background

In the prior art, a large-scale engineering drilling machine adopts a drill rod in the work of a drilling process of transmitting power, protecting a wall by mud and washing a well by reverse circulation of compressed air. Because the jaw type drill rod joint has large bearing capacity, high reliability and quick disassembly, a large engineering drilling machine uses more drill rods with the jaw type joint. Along with the continuous improvement of the capacity of a drilling machine, the torque force required to be overcome for disassembling the jaw type drill rod joint is larger and larger, manual disassembly is adopted in the prior art, and the requirement cannot be met.

The publication No. CN2674073Y proposes a hydraulic clamp, but the jaw type drill rod dismounting clamp has lower freedom degree and larger occupied space.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the jaw type drill rod dismounting clamp provided by the embodiment of the utility model has the advantages of high driving power, strong adaptability, flexibility, capability of solving the dismounting problem of a large jaw drill rod, simple operation and compact structure.

The jaw type drill rod dismounting clamp comprises a rotary support, a telescopic arm, a caliper, a friction wheel driving device, a hydraulic system and the like.

The rotary support mainly comprises a base and a rotary body, wherein the base is fixed on a chassis or other parts of the drilling machine, and the rotary body can horizontally rotate around the base;

the telescopic arm is formed by nesting two hollow rods or a plurality of hollow rods, a driving oil cylinder of the telescopic arm is arranged in a cavity of the telescopic arm, the large end of the horizontally arranged telescopic arm is fixedly connected with the revolving body, the telescopic arm is driven by the oil cylinder to do one-stage or multi-stage telescopic motion, and the small end of the telescopic arm is fixedly connected with the calipers;

the caliper mainly comprises two jaws and a clamping oil cylinder, wherein each jaw is in a curved rod shape, and the two jaws are horizontally arranged in a pincerlike manner and are driven by the clamping oil cylinder to relatively open and close;

the inner openings of the two jaws are fixedly connected with friction driving devices, each friction driving device drives a friction wheel to rotate by a hydraulic motor, the friction driving devices of the two jaws are symmetrically arranged relative to the axis of the telescopic arm, the two jaws clamp a drill rod joint needing to rotate through the friction wheels under the action of a clamping oil cylinder during working, a bus of each friction wheel is superposed with an excircle bus of the driven drill rod joint, and all the friction wheels drive the drill rod joint needing to rotate to a certain angle towards the same direction, so that the teeth in the jaw-type drill rod joint are embedded or separated.

A friction braking device is arranged between a base of the slewing bearing and the slewing body, the friction braking device comprises a friction plate, a pre-tightening spring, an unlocking oil cylinder and the like, the pre-tightening spring applies positive pressure to the friction plate to generate braking torque to implement slewing braking on the slewing body, when the unlocking oil cylinder acts, the pre-tightening spring is further compressed, the pre-tightening spring is separated from the friction plate, and braking on the slewing body is released.

In the embodiment of the utility model, one of the two jaws of the caliper is a static jaw, the other jaw is a movable jaw, one end of a clamping oil cylinder is hinged with the static jaw, the other end of the clamping oil cylinder is hinged with the movable jaw, the static jaw is fixedly connected with the small end of the telescopic arm, a slideway vertical to the telescopic arm is arranged on the static jaw, and the movable jaw can reciprocate under the pushing of the clamping oil cylinder along the slideway of the static jaw so as to realize the clamping and loosening actions of the two jaws.

In the embodiment of the utility model, when the friction wheel driving device is used for driving multiple friction wheels on the same jaw, each friction wheel device is not directly fixed on the jaw but installed on the base frame, and the base frame is designed according to the principle of a balance beam, so that the pressure uniform loading of the multiple friction wheels on the same jaw can be realized, namely, the hinge pins are hinged between the base frame and between the base frame and the jaw on the same jaw, and the hinge pins are parallel to the friction wheel shafts. In order to increase the driving torque of each friction wheel and reduce the volume of each friction wheel, a speed reducer is arranged in each friction wheel, and the speed reducer has the basic structure of a planetary speed reducer, namely a sun wheel, a planetary carrier and an internal gear.

In each working cycle of the jaw type drill rod dismounting clamp, the drill rod dismounting clamp can automatically and completely position a drill rod joint by manually adjusting the rough position of the dismounting clamp and depending on the slipping of a friction plate in a slewing bearing inner slewing body friction braking device and the floatability of a telescopic arm driving oil cylinder.

The hydraulic system is an integration of a hydraulic pump station, a hydraulic control system and an electric control system, and is fixed at a position above the drilling machine where the drilling machine is convenient to operate.

Has the advantages that:

by adopting the technical scheme, the special disassembly and assembly device for the jaw type drill rod of the large engineering drilling machine solves the disassembly and assembly problem of the large jaw type drill rod. The friction wheel is adopted for driving, so that the drilling rig can quickly enter a station during working and can quickly leave the station after working is finished, and the equipment can be almost suitable for any large drilling machine adopting a jaw type drilling rod and embodies the characteristic of strong adaptability; when the jaw-type drill rod disassembling and assembling clamp is used, only simple telescopic arm stretching and hydraulic motor rotating operations are needed, and the jaw is used for automatically and accurately positioning a drill rod, so that the jaw-type drill rod disassembling and assembling clamp has the characteristics of simplicity and convenience in operation and flexibility; various oil cylinders, speed reducers and the like are all designed in a built-in mode, so that the jaw type drill rod dismounting tongs have the characteristic of compact structure.

Drawings

FIG. 1 is a front view of jaw-type pipe-handling pliers according to an embodiment of the present invention;

FIG. 2 is a top view of a jaw-type drill rod dismantling clamp according to an embodiment of the present invention;

FIG. 3 is a schematic view of a friction driving device of a jaw-type drill rod dismantling tong according to an embodiment of the present invention;

fig. 4 is an enlarged view of the chassis and the swiveling mechanism of the jaw-type pipe dismantling tong according to the embodiment of the present invention.

Reference numerals:

a slewing bearing flange 1; a base 2; arotator 3; a rollingbearing 4; afriction plate 5; pre-tightening the spring 6; an unlocking oil cylinder 7; alarge end flange 8; a firsthollow bar 9; a second hollow bar 10; a third hollow shaft 11; a small end flange 12; a two-stagetelescopic oil cylinder 13; ahinge shaft 14, a hinge shaft 15 and a key 16; astationary jaw 17; amovable jaw 18; aspherical hinge pad 19; aclamping cylinder 20; a hinge shaft 21; ahinge shaft 22; ahinge shaft 23; abase frame 24; ahydraulic motor 25; asun gear 26; acarrier 27; a planet wheel 28; a friction wheel (internal gear) 29, anupper half shaft 31, and a lower half shaft 32; a nylon column 33; a flange 34.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

As shown in fig. 1, 2 and 3, in order to solve the above technical problem, the present invention adopts the following technical solutions: a jaw type drill rod disassembling and assembling clamp comprises a rotary support, a telescopic arm, calipers, a friction wheel driving device, a hydraulic system and the like.

As shown in fig. 1, the slewing bearing is mainly composed of a base 2, aslewing body 3, and the like. The base 2 is fixed on a chassis or other parts of the drilling machine through a slewing bearing flange 1, a rollingbearing 4 is arranged between theslewing body 3 and the base 2, and theslewing body 3 can rotate horizontally around the base 2. A friction braking device is arranged between a base 2 of a slewing bearing and aslewing body 3, the friction braking device is arranged in a cavity of theslewing body 3 and comprises afriction plate 5, a pre-tightening spring 6, an unlocking oil cylinder 7, a seat frame and an upper gland, thefriction plate 5 comprises an outer tooth friction plate and an inner tooth friction plate, an outer spline of the outer tooth friction plate is meshed with an inner spline of the seat frame, an inner spline of the inner tooth friction plate is meshed with an outer spline of a gear sleeve, the outer tooth friction plate and the inner tooth friction plate are sequentially and alternately stacked, the pre-tightening spring 6 is installed inside the unlocking oil cylinder 7, and the unlocking oil cylinder 7 is respectively connected with the seat frame, the upper gland and an adjusting nut. A pre-tightening spring 6 arranged in an unlocking oil cylinder 7 applies positive pressure to thefriction plate 5 to generate braking torque to implement rotary braking on therotary body 3. When the unlocking cylinder 7 acts, the pre-tightening spring 6 is further compressed, the pre-tightening spring 6 is disengaged from thefriction plate 5, and the braking of the revolvingbody 3 is released.

As shown in fig. 1 and 2, the telescopic boom is formed by three round tubes which are nested, and is respectively a first hollow rod 9 (fixed arm), a second hollow rod 10 (primary boom), and a third hollow rod 11 (secondary boom), and can perform secondary telescopic, and a drivingoil cylinder 13 of the telescopic boom is a secondary telescopic oil cylinder and is arranged in a cavity of the telescopic boom. One end of thetelescopic oil cylinder 13 is hinged with thebig end 14 of the fixed arm, and the other end is hinged with the tail end 15 of the secondary arm. The big end of the telescopic arm horizontally arranged is fixedly connected with the revolving body through abig end flange 8, the small end of the telescopic arm is fixedly connected with the caliper through a small end flange 12, and the telescopic arm is driven by anoil cylinder 13 to do two-stage telescopic motion. In order to limit the relative rotation between the arms of the telescopic arm, the firsthollow rod 9 and the second hollow rod 10 are respectively provided with a key slot, keys 16 corresponding to the key slots are respectively fixed on the second hollow rod 10 and the third hollow rod 11, and each key 16 slides in the key slot to adapt to the telescopic motion of the telescopic arm.

As shown in fig. 2, the caliper is mainly composed of two jaws (astationary jaw 17 and a movable jaw 18) and aclamping cylinder 20. One end of the clampingoil cylinder 20 is hinged with thestatic gripper 17 through a hinge shaft 21, and the other end is hinged with themovable gripper 18 through ahinge shaft 22. Thestatic tong claws 17 are connected with the small end flange of the telescopic arm, and square hole-shaped slideways perpendicular to the telescopic arm are arranged on the static tong claws. One end of themovable jaw 18 is embedded in the slideway of thefixed jaw 17 and can reciprocate along the slideway under the push of the clampingcylinder 20 so as to realize the clamping and loosening actions of the two jaws. Each jaw is in a folded arm shape, and the two jaws are arranged in a horizontal pincer shape.

As shown in fig. 2 and 3, two friction driving devices are respectively arranged at the inner openings of each jaw. The two friction driving devices of the same jaw are not directly fixed on the jaw, but are arranged on abase frame 24, and thebase frame 24 is designed according to the principle of a balance beam, so that the pressure uniform loading of the two friction wheels 29 on the same jaw can be realized. Thehinge 23 of the pin shaft is arranged between thebase frame 24 and the claw, and thehinge 23 of the pin shaft is parallel to the axis of the friction wheel 29. The friction driving devices of the two jaws are symmetrically arranged in a horizontal plane relative to the axis of the telescopic arm, and the two jaws clamp a drill rod joint needing to rotate under the action of the clampingoil cylinder 20 through the friction wheels 29 during work. The generatrix of each friction wheel 29 is superposed with the excircle generatrix of the driven drill rod joint, and all the friction wheels 29 drive the drill rod joints needing to rotate for a certain angle towards the same direction, thereby realizing the embedding or the separation of the teeth in the jaw type drill rod joint. In order to increase the drive torque of each friction drive and to make it compact, the friction wheel 29 is provided with a reduction gear, which has the basic structure of a planetary reduction gear, namely asun gear 26, planet gears 28, aplanet carrier 27 and an annulus gear 29, and is characterized in that theplanet carrier 27 is fixed to thebase frame 24, the friction wheel 29 is also an annulus gear, and the friction wheel 29, which is also an annulus gear, is driven by thehydraulic motor 25 to rotate relative to thebase frame 24 via the reduction gear. Thebase frame 24 is of an integral open structure to facilitate the installation of the friction wheel assembly including the speed reducer from the opening of thebase frame 24. Theplanet carrier 27 is supported at both ends by an upper half-shaft 31 and a lower half-shaft 32, respectively, into holes in an upper box plate and a lower box plate of thebase frame 24, respectively, and the friction wheels are supported on the two half-shafts 31 and 32 by means ofroller bearings 30. A cross-stitch nylon pin 33 is arranged between the matching cylindrical surfaces of the lower half shaft 32 and theplanet carrier 27 so as to realize the transmission of the reaction torque of theplanet carrier 27 to the friction wheel 29, and the reaction torque is finally transmitted to thebase frame 24 because the lower half shaft 32 is connected with a lower box plate flange 34 of thebase frame 24.

In each working cycle of the jaw type drill rod dismounting clamp, the automatic accurate positioning of the drill rod joint by the drill rod dismounting clamp can be realized only by manually adjusting the initial position of the dismounting clamp and depending on the slipping of thefriction plate 5 in the slewing bearing inner slewing body friction braking device and the floatability (determined by a hydraulic system) of the telescopic armdriving oil cylinder 13.

The motion control of each oil cylinder and each hydraulic motor is realized by a hydraulic system. The hydraulic system is an integration of a hydraulic pump station, a hydraulic control system and an electric control system, and is fixed at a position above the drilling machine where the drilling machine is convenient to operate.

The utility model is used as auxiliary operation equipment when a large-scale engineering drilling machine adopts a jaw type drill rod, solves the difficulty of dismounting the large-scale jaw type drill rod, and has the advantages of strong adaptability, compact structure, flexibility, easy operation and the like.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model and it is intended to cover in the claims the utility model as defined in the appended claims.

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "rear", "upper", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.

Claims (7)

1. The utility model provides a jaw formula drilling rod dismouting pincers which characterized in that includes:

the rotary support comprises a base and a rotary body, the base is fixed on a chassis or other parts of the drilling machine, and the rotary body is in rotating fit with the base;

the clamp comprises two clamp claws and a clamping oil cylinder, the two clamp claws are arranged in a clamp shape and are matched in a sliding manner, and the clamping oil cylinder can drive the two clamp claws to open or close;

one end of the telescopic arm is connected with the revolving body; the other end of the telescopic arm is connected with the calipers;

a plurality of friction wheel drive, friction wheel drive includes friction wheel, decelerator and hydraulic motor, a plurality of friction wheel drive establish the back mouth department of two claws, and respectively with two claws are connected, a plurality of friction wheel drive are relative the axis symmetric distribution of flexible arm, hydraulic motor is used for the drive the friction wheel rotates, the generating line of friction wheel and the coincidence of tooth formula drilling rod joint's excircle generating line.

2. The jaw-type drill rod dismantling tong of claim 1, characterized in that: the telescopic arm comprises a plurality of hollow rods and a driving oil cylinder, the hollow rods are mutually nested to form a cavity and have different inner diameters, the hollow rods are mutually nested to form a large-diameter end and a small-diameter end, the driving oil cylinder is arranged in the cavity, the large-diameter end of each hollow rod is connected with the revolving body, and the small-diameter end of each hollow rod is connected with the caliper.

3. The jaw-type drill rod dismantling tong of claim 2, characterized in that: the two clamp claws are respectively a static clamp claw and a movable clamp claw, one end of the clamping oil cylinder is hinged with the static clamp claw, the other end of the clamping oil cylinder is hinged with the movable clamp claw, the static clamp claw is connected with the small-diameter end of the telescopic arm, a slide way is arranged on the static clamp claw, the movable clamp claw can reciprocate along the slide way, and the clamping oil cylinder is used for driving the movable clamp claw to reciprocate.

4. The jaw-type drill rod dismantling tong of claim 3, characterized in that: the friction braking device comprises friction plates, a pre-tightening spring, an unlocking oil cylinder, a seat frame and an upper pressing cover, the friction plates comprise outer tooth friction plates and inner tooth friction plates, the outer tooth friction plates and the inner tooth friction plates are sequentially and alternately stacked, the outer tooth friction plates are meshed with the seat frame in a matched mode, the pre-tightening spring is installed inside the unlocking oil cylinder, and the unlocking oil cylinder is respectively connected with the seat frame, the upper pressing cover and an adjusting nut.

5. The jaw-type drill rod dismantling tong of claim 4, characterized in that: the clamp is characterized in that a base frame is further arranged at the inner openings of the two clamp claws, the base frame is connected with the clamp claw pin shafts, the friction wheels are arranged on the base frame, and the pin shafts are parallel to the friction wheel shafts.

6. The jaw-type drill rod dismantling tong of claim 5, characterized in that: the friction wheel is internally provided with a speed reducer, the speed reducer comprises a sun wheel, a planet carrier and an internal gear, the planet carrier is fixedly connected with the base frame, the friction wheel is used as the internal gear and is opposite to the hydraulic motor under the drive of the hydraulic motor through a speed reducer, two ends of the planet carrier are respectively supported in holes of an upper box plate and a lower box plate of the base frame by an upper half shaft and a lower half shaft, the friction wheel is supported on the two half shafts through roller bearings, the planet wheel is respectively engaged with the internal gear, and the sun wheel is respectively engaged with the planet wheel.

7. The jaw-type drill rod dismantling tong of claim 6, characterized in that: the driving oil cylinder, the clamping oil cylinder, the hydraulic motor and the unlocking oil cylinder are all controlled by a hydraulic system.

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