WO2016093376A1

WO2016093376A1 - Casing rotator

Info

Publication number: WO2016093376A1
Application number: PCT/KR2014/011997
Authority: WO
Inventors: 이상식; 이상태
Original assignee: (주)부마씨이
Priority date: 2014-12-08
Filing date: 2014-12-08
Publication date: 2016-06-16

Abstract

The present invention relates to a casing rotator and, more particularly, to a casing rotator configured such that, even if the verticality of a casing and the verticality of the rotator itself are not aligned with each other, load on a bearing can be distributed, thereby protecting the bearing. The casing rotator according to the present invention comprises a lower frame means, a middle frame means, an upper frame means, a clamping cylinder, and a post means. The lower frame means comprises a lower frame, which has a through-hole formed therein such that a casing can be inserted therein; an outrigger installed on the lower frame such that the lower frame can be maintained horizontally, with regard to the ground, and supported; and a retainer unit installed on the lower frame such that the casing, which has been inserted into the through-hole, can be retained. The middle frame means comprises a middle frame, which is positioned on the upper portion of the lower frame, and which has a through-hole formed therein such that the casing can be inserted; a driving motor installed in the middle frame; a reduction gear unit for reducing the driving rate of the driving motor and transferring the same; a clamp body, which has a through-hole formed therein such that the casing can be inserted therein, and which is coupled to the reduction gear unit to be able to rotate by means of the reduction gear unit; and a driving bearing installed on the middle frame to be able to support the clamp body. The upper frame means comprises an upper frame, which is positioned on the upper portion of the middle frame, and which has a through-hole formed therein such that the casing can be inserted therein; a wedge clamp inserted into the clamp body so as to grasp the casing; and an upper bearing installed on the upper frame so as to support the wedge clamp. The clamping cylinder, in order move the upper frame up/down, has one end fixed to the upper frame and the other end fixed to the middle frame such that the same can protract/retract. The post means comprises: a guide post installed on the middle frame; a lower guide installed on the lower frame to be able to slide along the guide post; a crowd cylinder having one end fixed to the lower guide and the other end fixed to the guide post such that the same can protract/retract, thereby enabling the middle frame to move up/down; and an upper guide fixed to the upper frame such that, when the guide post moves up/down, the same is guided.

Description

Casing rotator

The present invention relates to a casing rotator, and more particularly, to a casing rotator capable of distributing a load on a bearing even when the verticality of the casing and the intermediate frame of the rotator do not match. .

Rotators are equipment for foundation work, which is one of the many pieces of equipment that drives the casing under the ground. Although it is relatively easy to secure the verticality of the casing, it has been preferred at construction sites, but the equipment price is higher than that of the casing oscillator which does the same work, and the heavy load according to the complex geological conditions is not high. The construction site where is required has been rejected.

However, the geological conditions are relatively simple and are continuously used in the field where the work is possible at light load.

Korean Patent No. 10-0758113 discloses a method for constructing a large-diameter pile in the field using underwater casing rotator.

The casing rotator is excavated using a casing, so it is important to match the verticality of the casing with the rotator. An object of the present invention is to provide a casing rotator capable of adjusting the verticality of the casing by using the upper guide and the lower guide.

In addition, the casing rotator has a problem that if the verticality of the casing and the rotator is not accurate, an excessive load acts on the upper bearing and the lower bearing to damage the bearing. An object of the present invention is to provide a casing rotator capable of preventing an excessive force from acting on the upper bearing and the lower bearing even if the axes of the intermediate frame and the upper frame do not coincide.

The casing rotator according to the present invention includes a lower frame means, an intermediate frame means, an upper frame means, a clamping cylinder and a post means. The lower frame means for fixing the lower frame is formed through holes through which the casing can be inserted, the outrigger installed in the lower frame to support the lower frame horizontally from the bottom, and the casing inserted into the through hole It is provided with a retainer portion installed in the lower frame to be. The intermediate frame means is located in the upper portion of the lower frame and the intermediate frame is formed through holes through which the casing can be inserted, the drive motor installed in the intermediate frame, the reduction gear unit for reducing the transmission speed of the drive motor and And a clamp body coupled to the reduction gear portion so that the through hole into which the casing can be inserted is formed and rotated to the reduction gear portion, and a driving bearing installed in the intermediate frame to support the clamp body. . The upper frame means is located in the upper portion of the intermediate frame and the upper frame is formed through holes through which the casing can be inserted, the wedge clamp is inserted into the clamp body for holding the casing, the wedge clamp to support the It has an upper bearing installed in the upper frame. The clamping cylinder is fixed to the upper frame and the other end is fixed to the intermediate frame in order to move the upper frame up and down. The post means includes a guide post installed at the intermediate frame, a lower guide installed at the lower frame to slide along the guide post, one end of which is fixed to the lower guide, and the other end of which is fixed to the guide post. And a crowded cylinder that is stretchable to move the frame up and down, and an upper guide fixed to the upper frame to guide the guide post when the guide post moves up and down.

In the casing rotator, the guide post preferably includes an upper guide post installed on an upper portion of the intermediate frame and a lower guide post disposed on a lower portion of the intermediate frame so as to be inserted into the upper guide.

Further, in the casing rotator, the upper guide is preferably formed through the through hole. In this case, the post means further includes a guide housing surrounding the upper guide and an elastic member installed in the guide housing to be inserted into the support hole to support the upper guide post.

In the casing rotator, the elastic member is preferably any one of a leaf spring, a coil spring or rubber.

Or in the casing rotator, the elastic member includes a pressurizing body for pressurizing the upper guide post at the support hole, a hydraulic cylinder having a support spring therein and installed in the guide housing, and one end of which is hinged to the pressurizing body. And a piston inserted into the inlet cylinder so as to pressurize the upper guide post and supported by the support spring.

In the casing rotator, the lower guide and the crowd cylinder are preferably integrally formed. In this case, the outrigger is installed in the lower guide.

According to the present invention, since the guide post slides along the upper guide and the lower guide, it is possible to match the verticality of the casing and the rotator.

In addition, according to the present invention, it is possible to reduce the load acting on the upper bearing and the lower bearing by buffering the overload generated by pressing the guide post with a leaf spring or a pressing body and the axis of the upper frame and the intermediate frame do not coincide. Therefore, an excessive load on the upper bearing and the lower bearing can be prevented from acting.

1 is a perspective view of one embodiment of a casing rotator in accordance with the present invention;

2 is a front view of the embodiment shown in FIG.

3 is a plan view of the embodiment shown in FIG.

4 is a side view of the embodiment shown in FIG.

5 is a perspective view of the lower frame means of the embodiment shown in FIG.

Figure 6 is a perspective view of the intermediate frame means of the embodiment shown in Figure 1,

7 is a perspective view of the upper frame means of the embodiment shown in FIG.

8 is a perspective view of a cross section of the embodiment shown in FIG. 1, FIG.

9 is an enlarged partial view of FIG. 8;

10 is a cross-sectional view of the embodiment shown in FIG. 1,

11 is an enlarged partial view of FIG. 10;

12 is a cross-sectional view taken from the direction A-A of FIG. 2,

13 is a sectional view of the post means of the embodiment shown in FIG.

14 is another conceptual view of the post means;

15 is a cross-sectional view of FIG.

16 is another conceptual view of the post means;

17 is another conceptual view of the post means.

10: lower frame means 11: lower frame

13: Outrigger 17: Retainer part

17a: retainer 17b: retainer cylinder

20: middle frame means 21: middle frame

23: drive motor 25: reduction gear unit

27: clamp body 29: drive bearing

30: upper frame means 31: upper frame

33: wedge clamp 35: upper bearing

40: clamping cylinder 50: post means

51: guide post 51a: upper guide post

51b: Lower guide post 53: Lower guide

55: crowd cylinder 57: upper guide

57a: support hole 59: guide housing

61: leaf spring 63: pressurized body

65: guide housing 67: hydraulic cylinder

69: support spring 71: piston

An embodiment of a casing rotator according to the present invention will be described with reference to FIGS. 1 to 13.

The casing rotator according to the present invention includes a lower frame means 10, an intermediate frame means 20, an upper frame means 30, a clamping cylinder 40, and a post means 50.

The lower frame means 10 includes a lower frame 11, an outrigger 13, and a retainer portion 17. The lower frame 11 has a through hole 11a through which a casing can be inserted. The outrigger 13 is installed in the lower frame so as to support the lower frame 11 horizontally from the bottom. The retainer portion 17 is installed in the lower frame 11 so as to fix the casing inserted into the through hole 11a. The retainer portion 17 is provided with a retainer 17a and a retainer cylinder 17b capable of wrapping the casing to fix the casing. When the retainer cylinder 17b contracts, the retainer 17a wraps and fixes the casing.

The intermediate frame means 20 includes an intermediate frame 21, a drive motor 23, a reduction gear portion 25, a clamp body 27, and a drive bearing 29. The intermediate frame 21 is positioned above the lower frame 11 and has a through hole through which a casing can be inserted.

The drive motor 23 is installed in the intermediate frame 20. The reduction gear unit 25 decelerates and transmits the driving speed of the driving motor 23. To this end, the reduction gear unit 25 may be composed of a reducer, pinion, idle. Since the drive motor 23 rotates at a high speed, it is transmitted by decelerating it. Clamp body 27 is formed in the through-hole through which the casing can be inserted is coupled to the reduction gear portion 25 to rotate to the reduction gear portion (25). The clamp body 27 is coupled to the reduction gear unit 25 by a gear, and when the reduction gear unit 25 rotates, the clamp body 27 rotates. In addition, the clamp body 27 is formed with an inclined groove so that the wedge clamp 33 described below can be inserted therein. The driving bearing 29 is provided with an intermediate frame 21 to support the clamp body 27. Therefore, when the drive motor 23 rotates, the reduction gear 25 decelerates the drive speed of the drive motor 23 to rotate the clamp body 27. Since the clamp body 27 is supported by the driving bearing 29, the clamp body 27 may rotate with respect to the intermediate frame 21.

The upper frame means 30 has an upper frame 31, a wedge clamp 33, and an upper bearing 35. The upper frame 31 is positioned above the intermediate frame 21 and has a through hole 31a through which a casing can be inserted. The wedge clamp 33 is inserted into the clamp body 27 serves to grip the casing. Since the groove of the clamp body 27 into which the wedge clamp 33 is inserted is inclined, when the wedge clamp 33 is inserted, the wedge clamp 33 moves inward in the radial direction. Accordingly, when the wedge clamp 33 is inserted, the casing inserted into the clamp body 27 can be gripped. The upper bearing 35 is installed on the upper frame 31 to support the wedge clamp 33. Thus, the wedge clamp 33 can rotate with respect to the upper frame 31.

The clamping cylinder 40 is stretchable, and one end is fixed to the upper frame 31 and the other end is fixed to the intermediate frame 21 to move the upper frame 31 up and down. Therefore, when the clamping cylinder 40 expands and contracts, the upper frame 31 moves up and down with respect to the intermediate frame 21. First, when the clamping cylinder 40 is reduced, the upper frame 31 is lowered, and thus the wedge clamp 33 is inserted into the clamp body 27 to grip the casing inserted into the clamp body 27. When the clamping cylinder 40 is extended, the upper frame 31 is raised. In this case, the wedge clamp 33 is pulled out of the clamp body 27 so that the casing is separated from the wedge clamp 33.

The post means 50 includes a guide post 51, a lower guide 53, a crowd cylinder 55, and an upper guide 57.

The guide post 51 is installed in the intermediate frame 21. At this time, the guide post 51 is composed of an upper guide post 51a and a lower guide post 51b, the upper guide post 51a is fixed to the upper part of the intermediate frame 21, and the lower guide post 51b is an intermediate frame. It is fixed to the lower part of 21.

The lower guide 35 is inserted into the lower guide post 51b and installed on the lower frame 11 so as to slide along the lower guide post 51b.

The crowd cylinder 55 is fixed at one end to the lower guide 53 and the other end to the guide post 51, and is stretched to allow the intermediate frame 21 to move up and down. That is, when the crowd cylinder 55 is extended, the intermediate frame 21 is raised relative to the lower frame 11, and when the crowd cylinder 55 is reduced, the intermediate frame 21 is lowered relative to the lower frame 11.

The upper guide 57 is fixed to the lower part of the upper frame 31 so that the upper guide post 51a is inserted and slid when the guide post 51 moves up and down. Therefore, the guide post 51 moves up and down when the cloud cylinder 55 is stretched and guided along the lower guide 53 and the upper guide 57.

On the other hand, the outrigger 13 is installed in the lower frame 11, but may be installed in the lower guide 57 as in this embodiment.

The operation of the present embodiment will be described below. First, the upper frame 31 is lowered by shrinking the clamping cylinder 40 to excavate the casing.

The wedge clamp 33 is then inserted into the clamp body 27 so that the wedge clamp 33 grips the casing. And the drive motor 23 is operated to rotate the clamp body (27). The clamp body 27, the wedge clamp 33 and the casing rotate. The clamp body 27 is supported on the intermediate frame 21 by the drive bearing 29, the wedge clamp 33 is supported on the upper frame 31 by the upper bearing 35. When the crowd cylinder 55 is contracted, the upper frame 57 and the intermediate frame 21 are lowered, and the casing is excavated. When the crowd cylinder 55 shrinks, the guide post 51 may be guided along the upper guide 57 and the lower guide 53 to descend.

Meanwhile, in the case of the casing rotator illustrated in FIGS. 1 to 13, when the verticality of the casing and the rotator does not coincide with each other, an excessive load is generated on the drive bearing 29 and the upper bearing 35, thereby driving the bearing 29 and the upper bearing. 35 is liable to be damaged.

In this case, the posting means 50 may further include a guide housing 59 and an elastic member in order to prevent excessive loads from being generated in the driving bearing 29 and the upper bearing 35.

First, in the case of FIGS. 14 and 15, the elastic member is composed of a leaf spring 61. In this case, the post means 50 further includes a guide housing 59 and a leaf spring 61. At this time, the upper guide 57 is formed with a plurality of support holes 57a penetrating the outer circumferential direction along the circumferential direction. The guide housing 59 surrounds the upper guide 57. The leaf spring 61 is supported by the guide housing 59 and inserted into the support hole 57a to support the upper guide post 51a. In this case, when the central axis of the casing is shifted from the central axis of the rotator, the guide post 51 is shifted so that the leaf spring 61 supports it. Therefore, it is possible to reduce the load on the driving bearing 29 and the upper bearing 35.

Next, in the case of FIG. 16, the elastic member includes a pressurizing body 63, a hydraulic cylinder 67, and a piston 71. Also in this case, the upper guide 57 is formed with a plurality of support holes 57a penetrating the outer circumferential direction along the circumferential direction. The pressing body 63 presses the upper guide post 51a at the position where the support hole 57a is formed. The inlet cylinder 67 and the piston 71 allow the pressurizing body 63 to pressurize the upper guide post 51a. For this purpose, the hydraulic cylinder 67 is installed in the guide housing 65 and has a support spring 69 therein. The piston 71 is inserted into the hydraulic cylinder 67 so that one end is supported by the support spring 69 and the other end is coupled to the press body 63. In the present embodiment, the pressing body 63 presses the upper guide post 51a by the force of the support spring 69. Therefore, when the shaft of the guide post 51 is shifted, the force is transmitted to the support spring 69 and absorbed. Meanwhile, the hydraulic cylinder 67 prevents the piston 71 from moving rapidly by acting as attenuation when the fluid is embedded in the piston 71 to move. As the elastic member, other shock absorbers such as coil springs or rubber may be used in addition to the embodiments described above.

1 to 13, the lower guide 53 and the crowd cylinder 55 are separately formed so that the crowd cylinder 55 is inserted into the lower guide 53. However, as shown in FIG. 17, the crowd cylinder and the lower guide may be integrally formed as shown in FIG. 17.

Claims

A lower frame having a through hole into which a casing can be inserted, an outrigger installed in the lower frame to support the lower frame horizontally from a floor, and the lower frame to fix the casing inserted into the through hole A lower frame means having a retainer portion installed at the lower portion;

An intermediate frame having a through hole through which the casing can be inserted, the drive motor installed in the intermediate frame, a reduction gear unit for reducing and transmitting a driving speed of the drive motor, and the casing therein; Intermediate frame means having a through-hole that can be inserted and the clamp body coupled to the reduction gear portion to rotate to the reduction gear portion, and a drive bearing installed in the intermediate frame to support the clamp body;

An upper frame having a through hole through which the casing can be inserted, a wedge clamp inserted into the clamp body to hold the casing, and an upper portion installed on the upper frame to support the wedge clamp; Upper frame means having bearings,

An elastic clamping cylinder having one end fixed to the upper frame and the other end fixed to the intermediate frame to move the upper frame up and down;

A guide post installed on the intermediate frame, a lower guide installed on the lower frame to slide along the guide post, one end of which is fixed to the lower guide, and the other end of which is fixed to the guide post so that the middle frame is moved up and down. A casing rotator, comprising: a post means having a crowded cylinder which is movable to move and an upper guide fixed to the upper frame to guide the guide post when the guide post is in motion.
The method of claim 1,

The guide post has a casing rotator comprising an upper guide post installed on the upper portion of the intermediate frame to be inserted into the upper guide, and a lower guide post provided on the lower portion of the intermediate frame.
The method of claim 2,

The upper guide is a through hole is formed,

The casing rotator further comprises a guide housing surrounding the upper guide and an elastic member inserted into the support hole to support the upper guide post.
The method of claim 3,

The elastic member is a casing rotator, characterized in that any one of a leaf spring, coil spring or rubber.
The method of claim 3, wherein the elastic member

Pressing body for pressing the upper guide post in the support hole,

A hydraulic cylinder having a support spring therein and installed in the guide housing;

A casing rotator, comprising: a piston hinged to one end of the press body and inserted into the inlet cylinder to be supported by the support spring so that the press body pressurizes the upper guide post.
The method according to any one of claims 1 to 5,

The lower guide and the crowd cylinder is formed integrally,

The outrigger casing rotator, characterized in that installed in the lower guide.