CN212054544U

CN212054544U - Lifting device for rotary drilling rig

Info

Publication number: CN212054544U
Application number: CN202020505194.1U
Authority: CN
Inventors: 聂伟荣
Original assignee: Individual
Current assignee: Hunan Shengshitong Technology Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-12-01
Anticipated expiration: 2030-04-08

Abstract

The utility model relates to an elevator for a rotary drilling rig, which comprises an upper joint, a middle sleeve and a lower joint, wherein the middle sleeve is fixedly connected with the lower joint, the upper joint comprises an integrally connected central shaft, the central shaft extends into an inner cavity of the middle sleeve to be rotationally connected with the middle sleeve, an angular contact bearing is arranged on a stepped shaft at the tail end of the central shaft, and an elastic gasket is arranged between one side of an outer ring of the angular contact bearing, which is far away from the upper joint, and the lower joint; the utility model discloses an above-mentioned setting for the drilling tool is when excavating harder foreign matter and producing ascending shake, because of the elastic gasket and angular contact bearing's existence, especially because of the elastic property of elastic gasket itself, elastic gasket will make lower clutch and top connection keep relative position always in the axial, when the shake takes place, the lower clutch will together upwards shake with the top connection and do not produce the cluster between each other and move, thereby prolong the utility model discloses dig the life of lifting mechanism for the drilling machine soon.

Description

Lifting device for rotary drilling rig

Technical Field

The utility model belongs to the technical field of engineering machine tool, concretely relates to dig elevator for rig soon.

Background

The elevator for the rotary drilling rig is a key part widely used in the field of rotary drilling rigs, and mainly plays a role in unloading the torsion generated by a drilling tool at the lower end so as to prolong the service life of a steel wire hung at the upper end; the existing market generally uses a combination mode of a plurality of single-row angular contact ball bearings to realize the rotary connection of an upper joint and a lower joint of a rotary joint, for example, a rotary drilling elevator with patent application number 201520297410.7, which comprises an upper connector 1, a cylinder 6, a bearing 7 and an end cover 4, wherein the upper connector 1 is matched with 5 angular contact bearings and axially fixed by a fixing nut 8, the fixing nut 8 is fixed with the upper connector 1 at the end face through a screw 9, the cylinder 6 is matched with the bearing 7, the cylinder 6 is connected with the end cover 4 through a fixing screw 2 and a spring gasket 3, the bearing 7 is axially positioned with the end cover 4 through a shaft shoulder in the cylinder 6, wherein one angular contact bearing far away from the fixing nut 8 is installed in a back-to-back mode, as shown in fig. 3. When the conventional rotary drilling elevator is actually installed, the end cover 4 can be completely attached to the cylinder 6 under the pressing of the fixing screw 2 and the spring gasket 3, but the convex ring on the inner wall of the end cover 4 for abutting against the angular contact bearing outer ring cannot be completely attached to the bearing outer ring, and a mounting gap is reserved during processing so that the end cover 4 and the cylinder 6 are completely attached to prevent the inner cavity of the elevator from being unsealed, so that when the rotary drilling elevator is actually used, particularly when a drilling tool excavates hard foreign matters to generate upward shaking, the cylinder 6 and the upper connector 1 can move due to the mounting gap, and the rotary drilling elevator is easy to damage; secondly, a plurality of angular contact bearings are mounted on the same stepped shaft, and the angular contact bearings are easy to rub against each other, so that the service life of the rotary drilling elevator is shortened.

SUMMERY OF THE UTILITY MODEL

For the problem that the elevator that the friction that the cluster that exists and the bearing each other leads to among the above-mentioned prior art is fragile is solved, the utility model provides an it uses the elevator to dig rig soon, aims at reducing or even eliminates foretell cluster to structurally stop the possibility of bearing each other friction each other, thereby prolong the life of elevator.

The technical solution of the utility model is that: the utility model provides a dig elevator for rig soon, includes top connection, middle cover, lower clutch, middle cover and lower clutch fixed connection, the top connection includes the center pin of body coupling, the center pin stretches into in the inner chamber of middle cover rather than rotate and be connected, be equipped with angular contact bearing on the terminal step shaft of center pin, one side of top connection, be equipped with the elastic gasket with the lower clutch are kept away from to angular contact bearing's outer lane.

Furthermore, two deep groove ball bearings and a thrust bearing are sleeved on the central shaft.

Further, be equipped with first step axle, second step axle, third step axle, fourth step axle on the center pin between from the top connection to terminal step axle, rotate on first step axle and the fourth step axle and be connected with deep groove ball bearing, the epaxial thrust bearing that is equipped with of second step, threaded connection has and is used for fixing on the third step the swivel nut of thrust bearing, be equipped with on the intermediate sleeve inner wall and hang the knot the bulge loop that thrust bearing is close to top connection one side.

Further, the thrust bearing is a self-aligning thrust roller bearing.

Further, the elastic gasket is a polyurethane gasket.

The utility model has the advantages that:

the utility model discloses a setting of the contact bearing in the terminal ladder epaxial corner of center pin and the setting of this angular contact bearing and top connection between the elastic gasket for when the drilling tool is excavating harder foreign matter and is producing ascending shake, because of the existence of elastic gasket and angular contact bearing, especially because of the elasticity attribute of elastic gasket itself, the elastic gasket will make lower clutch and top connection keep relative position always in the axial, when the shake takes place, the lower clutch will shake with the top connection together upwards and do not produce the play of moving each other, thereby prolong the utility model discloses the life of rotary drilling rig is with elevator; through the installation of each step shaft epaxial bearing, avoided installing a plurality of axles in same step shaft, from structural possibility of stopping bearing each other friction, further extension the utility model discloses the life of elevator.

Drawings

Fig. 1 is a schematic structural diagram of an elevator of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of an elevator of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of a rotary drilling elevator with application number 201520297410.7.

Detailed Description

The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1, the structure of the present invention is: a rotary drilling rig elevator comprises an upper joint 11, an intermediate sleeve 12 and a lower joint 13, wherein the intermediate sleeve 12 and the lower joint 13 are fixedly connected through threads, the upper joint 11 comprises a central shaft 14 which is integrally connected, the central shaft 14 extends into an inner cavity of the intermediate sleeve 12 to be rotatably connected with the intermediate sleeve, specifically, the central shaft 14 is provided with a first stepped shaft 14a, a second stepped shaft 14b, a third stepped shaft 14c, a fourth stepped shaft 14d and a tail end stepped shaft 14e from top to bottom, the first stepped shaft 14a and the fourth stepped shaft 14d are both rotatably connected with deep groove ball bearings 15, the outer ring of the deep groove ball bearing 15 on the first stepped shaft 14a is in interference fit with the inner wall of the intermediate sleeve 12, the deep groove ball bearing 15 is axially fixed by a retainer ring arranged on the upper side and the lower side of the deep groove ball bearing 15 on the fourth stepped shaft 14d and is in interference fit with the inner wall of the lower joint 13, the upper side of the deep groove ball bearing 15 is limited by the shaft shoulder of the stepped shaft, and the lower side is limited by a shaft retaining ring on the shaft and is axially fixed; the second stepped shaft 14b is provided with a thrust bearing 16, the upper side of the thrust bearing 16 is limited and fixed by the shaft shoulder of the stepped shaft, the lower side of the thrust bearing 16 is limited and axially fixed by a threaded sleeve 17 which is fixedly connected with the third stepped shaft 14c through threads, a convex ring 12a for hanging and buckling is arranged on the inner wall of the middle sleeve 12 corresponding to the thrust bearing 16, and the convex ring 12a is mainly used for transmitting the load on the lower joint 13 to the thrust bearing 16 and finally to the upper joint 11 which is integrated with the central shaft 14; the cover is equipped with angular contact bearing 18 of assembly dorsad on the terminal step shaft 14e of center pin 14, angular contact bearing 18's downside, with lower clutch 13 within a definite time be equipped with elastic gasket 19, angular contact bearing 18's upside is restricted by the shaft shoulder of this step shaft, the downside quilt elastic gasket 19 supports to lean on the restriction, because of elastic gasket 19 itself elastic property, whether take place the shake from top to bottom, elastic gasket makes lower clutch and top connection keep relative position always in the axial, when the shake takes place promptly, the lower clutch will shake upwards together with the top connection and do not produce the cluster between each other, thereby the extension the utility model discloses dig the life of drill elevator soon.

In this embodiment, like most of the elevators, a plurality of sealing rings are provided between the rotating gaps of the upper joint 11 and the intermediate sleeve 12 to prevent the leakage of the lubricating oil in the inner cavity and the intrusion of external silt.

Preferably, the thrust bearing 16 is a self-aligning thrust roller bearing.

Preferably, the elastic pad 19 is a polyurethane pad.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 in that a sleeve 20 is further provided on the second stepped shaft 14b and below the thrust bearing 16, one deep groove ball bearing 15 is sleeved on an outer wall of the sleeve 20, an isolation flange 20a is further provided on an upper outer wall of the sleeve 20, an upper inner ring of the deep groove ball bearing 15 is limited by the isolation flange 20a, and a lower side thereof is limited by a shaft retaining ring on the sleeve 20 and is axially fixed; the upper side of the thrust bearing 16 is limited and fixed by the shaft shoulder of the second step shaft 14b, the lower side is limited and fixed axially by the screw sleeve 17 which is connected and fixed with the adjacent third step shaft 14c in a threaded manner by abutting against the shaft sleeve 20, similarly, a convex ring 12a for hanging and buckling is arranged on the inner wall of the middle sleeve 12 corresponding to the thrust bearing 16, and the convex ring 12a is mainly used for transmitting the load on the lower joint 13 to the thrust bearing 16 and finally to the upper joint 11 which is integrated with the central shaft 14.

In use, taking example 1 as an example, under normal operation conditions, the lower joint 13 is connected with the intermediate sleeve 12 and rotates together with the drill, and the self weight of the drill acts on the thrust bearing 16 through the convex ring 12a on the intermediate sleeve 12, so that the self weight is transmitted to the upper joint 11 integrated with the central shaft 14 and finally transmitted to the hoisting steel wire rope connected to the upper end of the upper joint 11. When the lower joint 13 receives upward force suddenly, it acts on angular contact bearing 18 through elastic gasket 19, and finally acts on top connection 11, and this in-process, elastic gasket 19 is because of the elastic property of itself for the link at its upper and lower both ends is always in by the extrusion state, and elastic gasket makes lower joint and top connection keep relative position all the time in the axial promptly, even take place the shake, lower joint and top connection also together upward movement do not produce the cluster between each other, thereby prolong the utility model discloses dig the life of drill with elevator soon.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The utility model provides a rotary drilling rig is with elevator, includes top connection (11), middle cover (12), lower clutch (13), middle cover (12) and lower clutch (13) fixed connection, top connection (11) are including center pin (14) of body coupling, center pin (14) stretch into the inner chamber of middle cover (12) and rotate rather than be connected, its characterized in that, be equipped with angular contact bearing (18) on terminal step shaft (14e) of center pin (14), one side of top connection (11) is kept away from to the outer lane of angular contact bearing (18), with lower clutch (13) within a definite time be equipped with elastic gasket (19).

2. The elevator for the rotary drilling rig as recited in claim 1, wherein the central shaft (14) is further sleeved with two deep groove ball bearings (15) and a thrust bearing (16).

3. The elevator for the rotary drilling rig according to claim 2, wherein a first stepped shaft (14a), a second stepped shaft (14b), a third stepped shaft (14c) and a fourth stepped shaft (14d) are arranged on the central shaft (14) from the upper joint (11) to the tail end stepped shaft (14e), the first stepped shaft (14a) and the fourth stepped shaft (14d) are connected with the deep groove ball bearing (15) in a rotating mode, a thrust bearing (16) is arranged on the second stepped shaft (14b), a threaded sleeve (17) used for fixing the thrust bearing (16) is connected onto the third stepped shaft (14c) in a threaded mode, and a convex ring (12a) used for hanging and buckling the thrust bearing (16) on one side close to the upper joint (11) is arranged on the inner wall of the middle sleeve (12).

4. The elevator for the rotary drilling rig according to claim 3, wherein the thrust bearing (16) is a self-aligning thrust roller bearing.

5. The elevator for a rotary drilling rig according to claim 4, characterized in that the elastic washer (19) is a polyurethane pad.