Hydraulic clamp holder

Abstract

The utility model relates to a hydraulic clamp holder, and belongs to the technical field of drilling equipment. According to the technical scheme, the clamping device is composed of a left side structure and a right side structure which are symmetrically arranged, the front end of a cam is of a cam structure, the rear end of the cam is of a circular structure, the middle of the cam is connected through a cuboid, the front end of the cam is hinged to a slip bowl through a rotating shaft, and the rear end of the cam is slidably connected with a base through a sliding shaft; a powerful magnet is embedded in the cam and slides in a manner of being tangent to the cam; the slips of the left side structure and the right side structure are both semicircular and are combined together to form a slip structure with a hollow circle in the middle, and the slip structure is used for clamping a drill rod of a drilling machine. Through the combination of hydraulic clamping and self-weight clamping, the drill rod is clamped by hydraulic pressure in a shallow hole and is clamped by the self-weight of the drill rod in a deep hole, and when the clamp is limited in large size and a drilling machine is suddenly powered off, reliable self-locking can be realized, and the drill running accident is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hydraulic clamps, belong to drilling equipment technical field. BACKGROUND

[0002] Full hydraulic power head type drilling rig (also known as power head type full hydraulic drilling rig) is generally provided with hydraulic clamp, currently, commonly used hydraulic clamp can be divided into three categories according to the force exertion mode when slip acts, namely normally closed type, normally open type and hydraulic loose tight type.

[0003] Normally closed hydraulic clamp is mainly composed of disc spring, loosening oil cylinder, slip, pull rod and booster oil cylinder etc. Although it can realize mechanical clamping and hydraulic loosening, it is limited by disc spring size, and is mainly used for clamping of small and medium full hydraulic power head type drilling rig.

[0004] Normally open hydraulic clamp is compact in structure, reliable in work, convenient in replacing slip and maintenance, and adjustable in clamping force, and it has certain floating centering as a whole, but the floating is realized by pushing the clamp slip of hydraulic clamp through swing movement of drill pipe, which has abrasive effect on drill pipe, and when power is suddenly cut off, the clamp will be automatically opened without power, so reliable self-locking cannot be realized, causing running drill accident.

[0005] Hydraulic loose tight clamp relies on oil cylinder to provide clamping force to clamp drill pipe, and it is limited by drilling rig hydraulic capacity, when drilling is deep and drill pipe is heavy, sliding will occur between drill pipe and clamp, reliable self-locking cannot be realized, and serious running drill accident can be caused. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of hydraulic clamp, by the combination of hydraulic clamping and self-weight clamping, rely on hydraulic clamping drill pipe when shallow hole, rely on drill pipe self-weight clamping drill pipe when deep hole, when the size of clamp is limited and when drilling rig is suddenly cut off, reliable self-locking can be realized, running drill accident is avoided, and the above problems in the background art are solved.

[0007] The technical scheme of the utility model is:

[0008] The hydraulic clamp comprises a clamp and a driving oil cylinder arranged on a base, the clamp is composed of a left structure and a right structure arranged symmetrically, the left structure comprises a sliding shaft, a cam, a slip seat, a synchronous gear I, a slip and a rotating shaft, the front end of the cam is a cam structure, the rear end is a circular structure, and a cuboid is connected in the middle, the front end of the cam is hinged with the slip seat through the rotating shaft, and the rear end is slidingly connected with the base through the sliding shaft, the sliding shaft is arranged on a sliding groove of the base, and the slip seat is provided with the slip; the slips of the left structure and the right structure are both semicircular, and are combined to form a slip structure with a hollow circle, which is used for clamping a drill rod of a drilling machine; the sliding shafts of the left structure and the right structure are connected through the synchronous gear I and a synchronous gear II matched with each other; the sliding shafts, the rotating shaft, the cam, the slip seat and the sliding groove on the base of the left structure and the right structure form a four-bar linkage mechanism as a whole; the two ends of the driving oil cylinder are respectively hinged with the sliding shafts of the left structure and the right structure, the driving oil cylinder drives the sliding shafts to slide on the base, and then drives the cam to move up and down, and drives the slip to open and close.

[0009] Further, the driving oil cylinder is provided with a one-way lock, so that the oil pressure of the clamping system is stable after the drilling machine is powered off, and reliable clamping is realized.

[0010] Further, a circular hole is arranged at the center of the bottom plate of the base, and a drill rod guide sleeve is arranged in the circular hole; two pairs of ear plates are arranged on the two sides of the bottom plate respectively, and a sliding groove is arranged on each ear plate, the sliding shaft passes through the sliding groove, and the sliding shaft slides in the sliding groove.

[0011] Further, the middle of the slip structure is a hollow circle, a plurality of vertical long grooves are arranged on the inner wall of the hollow circle, the number of the long grooves is three or four according to the different diameters of the clamped drill rod, and alloy strips or triangular tooth structures are arranged in each long groove to increase the friction with the drill rod and clamp the drill rod.

[0012] Further, through holes are arranged on the synchronous gear I and the synchronous gear II of the left structure and the right structure, and the through holes are connected with the corresponding rotating shafts.

[0013] Further, a blind hole is arranged on the slip, and a strong magnet is embedded in the blind hole, and the strong magnet is in tangential contact with the cam.

[0014] When the cylinder rod of the driving oil cylinder is shortened, the sliding shafts of the left structure and the right structure slide inward, at this time, the cam drives the slip seat to move upward, under the action of the strong magnet of the slip, the cam drives the slip to move outward, and the drill rod is loosened; when the cylinder rod of the driving oil cylinder is elongated, the sliding shafts of the left structure and the right structure slide outward, at this time, the cam drives the slip seat to move downward, the cam drives the slip to move inward, and the drill rod is clamped;

[0015] In the shallow hole drilling, the drill pipe is lighter in weight, the clamping force generated by the drill pipe weight is smaller than the friction force between the drill pipe and the slips, and the drill pipe cannot be clamped, and mainly relies on the driving oil cylinder to provide the clamping force; in the deep hole drilling, the drill pipe is heavier in weight, when the cylinder rod of the driving oil cylinder is elongated to make the slips hold the drill pipe, the sliding shaft does not move the end of the sliding groove, the slip seat, the slip, the cam and the drill pipe are all in a suspended state, at this time, the slip tightly holds the drill pipe, the drill pipe drives the slip and the slip seat to move downward under the action of gravity, the cam drives the sliding shaft to move outward, and the support plate and the sliding shaft support the connecting rod structure at the same time, further clamping the drill pipe, and realizing the conversion of the clamping force from the hydraulic pressure to the weight.

[0016] The utility model discloses the beneficial effects are: adopt the driving oil cylinder as the initiative power source, distinguish from the normally closed type hydraulic clamp, not subject to the disc spring size, can design into the medium -large -size clamp, driving oil cylinder is equipped with one -way lock, and the clamping system oil pressure is stable, realizes reliable clamping, through the drill pipe's weight clamping drill pipe, and the drill pipe clamping is stable, through replacing the slip of different specifications to apply the drill pipe of different specifications, adopt the symmetrical structure, and equip synchronous gear guaranteeing that the slip seat is stable in lifting, and the structure is simple, and the scope of application is wide. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view of the utility model embodiment,

[0018] Figure 2 It is the top view of the utility model embodiment,

[0019] Figure 3 It is the base schematic view of the utility model embodiment,

[0020] Figure 4 It is the clamping state schematic view of the utility model embodiment,

[0021] Figure 5 It is the loosening state schematic view of the utility model embodiment,

[0022] In the drawing: base 1, sliding shaft 2, cam 3, slip seat 4, synchronous gear one 5, slip 6, rotating shaft 7, synchronous gear two 8, driving oil cylinder 9, one-way lock 10, bottom plate 11, ear plate 12, sliding groove 13, support plate 14, round hole 15, side plate 16, vertical long slot 17, triangular tooth structure 18, have strong magnet 19. PREFERRED EMBODIMENT

[0023] The utility model is further explained in connection with the drawings through the embodiment.

[0024] Refer to the attached Figures 1-5The embodiment provides a hydraulic clamp, which comprises a clamp and a driving oil cylinder 9 arranged on a base 1, the clamp is composed of a left structure and a right structure arranged symmetrically, the left structure comprises a sliding shaft 2, a cam 3, a slip bowl 4, a synchronous gear one 5, a slip 6 and a rotating shaft 7, the front end of the cam 3 is in cam structure, the rear end is in circular structure, and the middle part is connected by a cuboid, the front end of the cam 3 is hinged with the slip bowl 4 through the rotating shaft 7, and the rear end is slidably connected with the base 1 through the sliding shaft 2, the sliding shaft 2 is arranged on a sliding groove 13 of the base 1, the slip 6 is arranged on the slip bowl 4, a blind hole is arranged on the slip 6, a powerful magnet 19 is inlaid in the blind hole, and the powerful magnet 19 is in tangential contact with the cam 3; the slips of the left structure and the right structure are both in semicircular shape, and are combined to form a slip structure with a hollow circle, which is used for clamping a drill rod of a drilling machine; the rotating shafts of the left structure and the right structure are meshingly connected through the synchronous gear one 5 and a synchronous gear two 8 matched with each other; the sliding shafts, the rotating shafts, the cam, the slip bowl and the sliding groove on the base of the left structure and the right structure form a four-bar linkage mechanism as a whole; the two ends of the driving oil cylinder 9 are respectively hinged with the sliding shafts 2 of the left structure and the right structure, the driving oil cylinder 9 drives the sliding shafts 2 to slide on the base, drives the cam 3 to move up and down, and drives the slip 6 to open and close.

[0025] The left structure and the right structure are the same in structure and are arranged symmetrically.

[0026] Referring to the accompanying drawings Figure 2 The driving oil cylinder is provided with a one-way lock 10, so that the oil pressure of the clamping system is stable after the drilling machine is powered off, and reliable clamping is realized. The one-way lock 10 is a mechanism known in the art.

[0027] Referring to the accompanying drawings Figure 3 A round hole 15 is arranged at the center of the bottom plate 11 of the base 1, and a drill rod guide sleeve is arranged in the round hole 15. Two pairs of ear plates 12 are arranged on the two sides of the bottom plate respectively, a sliding groove 13 is arranged on each ear plate, the sliding shaft 2 passes through the sliding groove 13, and the sliding shaft slides in the sliding groove 13.

[0028] Referring to the accompanying drawings Figure 3 Support plates 14 are arranged between the ear plates 12, which are used for supporting the cam 3, so as to improve the stress of the sliding shaft.

[0029] Referring to the accompanying drawings Figure 2 The slip bowl 4 is composed of a bottom plate and two side plates 16, and the slip 6 slides between the two side plates. The side plates 16 are provided with through holes, and the rotating shaft 7 passes through the through holes.

[0030] Referring to the accompanying drawings Figure 4 and 5The middle of the slip-on structure is a hollow circle, and a plurality of vertical long grooves 17 are arranged on the inner wall of the hollow circle. According to the diameters of the clamped drill pipes, the number of the long grooves is three or four. An alloy strip or a triangular tooth structure 18 is arranged in each long groove to increase the friction with the drill pipe and clamp the drill pipe.

[0031] The left structure and the right structure are connected with the rotating shaft through the through holes in the synchronous gear one 5 and the synchronous gear two 8.

[0032] Referring to the drawings Figure 4 and 5 The left structure and the right structure are connected with the rotating shaft through the through holes in the synchronous gear one 5 and the synchronous gear two 8.

[0033] When the cylinder rod of the driving oil cylinder 9 is shortened, the sliding shafts 2 of the left structure and the right structure slide inward. At this time, the cam 3 drives the slip-on seat 4 to move upward, and the slip-on 6 moves outward under the action of the strong magnet 19, so that the drill pipe is loosened. When the cylinder rod of the driving oil cylinder 9 is lengthened, the sliding shafts 2 of the left structure and the right structure slide outward. At this time, the cam 3 drives the slip-on seat 4 to move downward, and the slip-on 6 moves inward, so that the drill pipe is clamped.

[0034] When the drill pipe is used for shallow hole drilling, the self-weight of the drill pipe is light, the clamping force generated by the self-weight of the drill pipe is smaller than the friction between the drill pipe and the slip-on, and the drill pipe cannot be clamped. The clamping force is mainly provided by the driving oil cylinder 9. When the drill pipe is used for deep hole drilling, the self-weight of the drill pipe is heavy. When the cylinder rod of the driving oil cylinder 9 is lengthened and the slip-on 6 clamps the drill pipe, the sliding shaft 2 does not move to the end of the sliding groove, and the slip-on seat 4, the slip-on 6, the cam 3 and the drill pipe are in a suspended state. At this time, the slip-on 6 tightly holds the drill pipe, and the drill pipe drives the slip-on 6 and the slip-on seat 4 to move downward under the action of gravity, so that the cam 3 drives the sliding shaft 2 to move outward, the support plate 14 and the sliding shaft 2 support the connecting rod structure at the same time, and the drill pipe is further clamped, so that the clamping force is changed from hydraulic pressure to self-weight.

[0035] In the embodiment, the bottom plate 11 of the base 1 is provided with a drill pipe guide sleeve at the center thereof. The two end ear plates 12 are provided with sliding grooves 13, and the sliding shafts 2 pass through the sliding grooves 13 and slide with the sliding grooves 13. The slip-on seat 4 is provided with a smooth notch plane, and the two slip-ons 6 of the left structure and the right structure slide on the notch plane. The two side plates of the slip-on seat 4 are provided with through holes, and the rotating shafts 7 pass through the through holes and are hinged. The cam 3 is provided with two through holes at the two ends thereof, and the rotating shafts 7 and the sliding shafts 2 pass through the through holes, respectively. The slip-on 6 is provided with two blind holes at the back thereof, and two strong magnets 19 are embedded in the blind holes and are in tangential contact with the cam 3, and the slip-on 6 slides with the cam 3. The middle part of the slip-on 6 is provided with a circular arc structure corresponding to the size of the clamped drill pipe, and an alloy strip or a triangular tooth structure 18 is arranged on the circular arc structure to increase the friction with the drill pipe and clamp the drill pipe. The two hinge ears of the driving oil cylinder 9 are connected with the corresponding sliding shafts 2, and are hinged.

[0036] The working principle is: when using, when the rodless cavity of driving oil cylinder 9 is connected with high pressure oil, the piston rod extends, the articulated sliding shaft 2 is reversely slid in the sliding groove 13 of the ear plate at both ends of the base 1, and then drives the cam 3 to move downward, the slips 6 are closed, and the drill pipe is clamped; similarly, when the rod cavity of the driving oil cylinder 9 is connected with high pressure oil, the piston rod retracts, the articulated sliding shaft 2 slides towards each other in the sliding groove 13 of the ear plate at both ends of the holder base 1, and then drives the cam 3 to move upward, the slips 6 are opened, and the drill pipe passes through smoothly; the driving oil cylinder 9 is provided with a one-way lock 10, which ensures that the oil pressure of the clamping system is stable after the drilling machine is powered off, and reliable clamping is realized;

[0037] Different specifications of drill pipes are suitable by replacing different specifications of slips 6; the symmetrical structure is adopted, and synchronous gear one 5 and synchronous gear two 8 are matched to ensure that the slip seat 6 is stable in lifting, the structure is simple, and the application range is wide.

Claims

1. A hydraulic clamp, characterized by: The utility model relates to a drilling pipe clamp, which comprises a base (1) and a driving oil cylinder (9) provided on the base (1), wherein the clamp is composed of a left structure and a right structure arranged symmetrically, the left structure comprises a sliding shaft (2), a cam (3), a slip seat (4), a synchronous gear one (5), a slip (6) and a rotating shaft (7), the cam (3) has a cam structure at the front end, a circular structure at the rear end and a cuboid connecting the front end and the rear end, the cam (3) is hinged to the slip seat (4) through the rotating shaft (7) at the front end, and the cam (3) is slidably connected to the base (1) through the sliding shaft (2) at the rear end, the sliding shaft (2) is arranged on a sliding groove (13) of the base (1), the slip seat (4) is provided with the slip (6), the slip (6) of the left structure and the right structure is semicircular, and the left structure and the right structure are combined to form a slip structure with a hollow circle, which is used for clamping a drilling pipe of a drilling machine, the rotating shafts of the left structure and the right structure are connected through the synchronous gear one (5) and a synchronous gear two (8) matched with each other, the sliding shaft, the rotating shaft, the cam, the slip seat and the sliding groove of the base of the left structure and the right structure form a four-bar linkage mechanism as a whole, the two ends of the driving oil cylinder (9) are respectively hinged to the sliding shafts (2) of the left structure and the right structure, the driving oil cylinder (9) drives the sliding shafts (2) to slide on the base, drives the cam (3) to move up and down, and drives the slip (6) to open and close.

2. A hydraulic clamp according to claim 1, characterized in that: The driving oil cylinder (9) is provided with a one-way lock (10).

3. A hydraulic clamp according to claim 1, wherein: The base (1) is provided with a circular hole (15) in the center of a bottom plate (11) and a drilling pipe guide sleeve is arranged in the circular hole (15), two pairs of ear plates (12) are arranged on both sides of the bottom plate (11), each ear plate (12) is provided with a sliding groove (13), the sliding shaft (2) passes through the sliding groove (13), and the sliding shaft (2) slides in the sliding groove (13).

4. A hydraulic clamp according to claim 1 or 2, characterised in that: The slip (6) is provided with a blind hole, a powerful magnet (19) is inlaid in the blind hole, and the powerful magnet (19) is in tangential contact with the cam (3).

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