JPH086546B2 - Device for detachably connecting a perforated tube to a rotary drive - Google Patents

Abstract

The invention relates to a simple device for releasably connecting a drill pipe to a rotary drive, the production, maintenance and use of which involve little expense. The device avoids the dangerous handling at a height of 6 to 8 m in the area of the rotary drive and at the top end of the drill pipe. The device according to the invention has a transmission means with which the torque can be transmitted over a relatively large distance, for example from the ground, to the connecting element, for example a push-in pin, which is guided in an axially displaceable manner in a connecting means at the rotary drive. This means is designed, for example, as a crankshaft and advantageously has a telescopic section as well as an element which can perform an angular movement, for example a steel rope of predetermined flexibility or a universal joint. The releasable connection between the transmission means and the displaceable push-in pin is formed by a hook on the transmission means and a ring on the connecting means, the ring being connected via a pivot pin to the rotationally-fixed push-in pin. <IMAGE>

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for releasably connecting a perforated tube or a perforated casing to a rotary drive of a boring device, for example.

[0002]

The creation of bored piles, support bores, casings, shafts and similar perforations is a function of the diameter and depth of the perforations, and in difficult soils, to prevent slippage of the ground or soil. Tubing required.

For this purpose, rotary drives for moving the perforated tube are used, for example rotary boring machines with forced rotary heads. Perforated tube of required length by connecting individual perforated tubes (length, 6-8m)
Forming a string or connecting a new perforated tube that is about to be installed with a rotary drive
Generally, screw bolts are used. To frictionally connect the new perforated tube to the rotary drive, the operator climbs the ladder at the connection point, for example, about 6-8 m high, and screws the bolt into the aligned openings of the perforated tube and the rotary drive. There must be. Since there are several connection points around the circumference of the rotary drive and the tube (diameter 600-1800 mm), the work of climbing the ladder and rotating the screw bolt has to be repeated quite often.

Extending the perforated tubing or removing the individual tubes when pulling out the tubing requires a relatively long working time, which is an obstacle to improving the working speed of boring. In addition, climbing ladders and performing work is dangerous and expensive to protect workers. Access to the connection points is more difficult in the case of sloping perforations.

DE-OS 36 42 387 discloses a drive means for a tubing system, in which a rotary drive device which is to be fitted to the upper perforated tube end in a mutually locked state is disclosed. Connection and disconnection are performed with the aid of radially displaceable coupling pins. These pins are automatically adjusted using a guide mechanism along with a servo drive. This adjustment can be done by a vent lever or a working cylinder, the piston rod end of which forms the joint pin. However,
Said means are complex from the point of view of construction and maintenance and have proven to be relatively disadvantageous in rough construction.
The impact and sludge action impair the operational reliability of many moving parts. These drawbacks are also present in the next variant of this coupling mechanism, which operates automatically with the boring drive. That is, if the joint pin and the threaded sleeve acting as a guide mechanism have the same threads and the torque is applied to the radially extending joint pin by the control drive, the gear rim, the pinion and the threaded sleeve, the joint pin is Is also guided through the perforated tube end and screwed into a threaded hole at the perforated tube end.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to relatively easily releasably connect a perforated tube to a rotary drive and at a limited cost to manufacture, maintain and use, especially during perforated tubing. An object is to provide a device that can reduce working time. The device can also avoid the risk of climbing and working up ladders to considerable heights conventionally encountered by drilling equipment operators.

[0007]

According to the invention, this object is achieved by the features stated in the characterizing part of claim 1 of the claims. That is, according to the present invention, the coupling element is guided in the casing of the rotary drive device by the torque action, and is displaced in the radial direction of the rotary drive device into the coupling opening of the perforated tube to remove the perforated tube and the rotary drive device. A freely connecting device, which transmits torque over a relatively long distance, can be connected to a connecting mechanism (20) provided on the rotary drive (15), and within this connecting mechanism (20). The coupling element such as the non-rotating cotter pin (28) is guided in the axial direction, and the torque transmission mechanism (1) includes an angularly movable element. Advantages and appropriate refinements will be apparent in the remaining claims and in the detailed technical description of the drawings.

[0008]

The basic idea of the invention is to connect and release the upper perforated tube end with respect to the rotary drive or with the rotary drive with respect to the ground, from the ground to the rotary drive at the upper perforated tube end. The torque is transmitted to the coupling mechanism having the coupling element fixed near the coupling opening portion of the rotary drive device by the transmission mechanism over the distance.

A coupling element which can be moved radially into the aligned connection opening of the upper perforated tube and which can be moved from this connection opening when released is a removable connection between the transmission mechanism and the connection mechanism on the rotary drive. (Advantageously consisting of a ring projecting radially from the coupling mechanism and a hook which can be inserted into said ring in mutual locking frictional condition at the upper end of the transmission mechanism), the coupling element comprising a transmission mechanism, for example a lower end. It is adjusted when it is rotated by operating a crank provided in the.

In order that the device according to the invention can be used effectively with different perforated tube lengths, it is advantageous to provide a transmission mechanism with at least one nesting part, for example a crankshaft. It is appropriate to configure the entire transmission mechanism as a nesting shaft. This length correction also simplifies handling and storage of the transmission mechanism.

According to the invention, the connection between the telescopic shaft or the crankshaft and the hook makes it possible to move the angle and transmit the torque to the hook inserted in the ring of the connection mechanism.

In particular, it is suitable to use a cardan joint or universal joint as a connecting element between the hook and the drive shaft (for example, a nesting shaft or a crankshaft). However, a spherical or rim joint is also suitable which is able to transfer the rotational movement of the crank drive by means of hooks and rings to the connecting element displaced by approximately 90 °, which causes a movement of the connecting element in a radial direction with respect to the bore tube axis. Is.

In a particularly advantageous construction, instead of an angularly movable joint, a steel cable, for example steel wound in a helical spring between a connecting rod (optionally with a telescoping part) and a hook.・
Use wire. Suitably the flexible steel cable is embedded in a wire envelope or leather hose.

The crankshaft or telescoping shaft slides in the tubular part (suitably located close to the lower end) by the actuation of the crank and the transmission mechanism is fully retained during the actuation of the crank.

The rotary drive device or the connecting mechanism of the present invention, which is fixed to the wall surface of the rotary drive device in the vicinity of the connection opening and projects outward in the radial direction, and is fixed by, for example, welding, has a circular ring shape. And a cotter pin or linch pin as a connecting element axially non-rotationally with respect to the casing axis, the perforation tube and the rotary drive axis being included. Can be displaced radially towards.

This non-rotating guide is preferably provided by a groove extending parallel to the casing axis on the inner surface of the casing and an adjusting spring which is slidably guided in the groove on the cotter pin. The longitudinal extension of the groove causes a maximum displacement of the cotter pin into and out of the connecting opening of the rotating tube as a function of the position of the adjusting spring in the cotter pin.

It is advantageous to show this displacement of the cotter pin into or out of the connecting opening of the rotating tube with the aid of a device that is visible to the operator at the lower end of the transmission mechanism.
For example, such a device may be a screw or threaded pin that is installed in the coupling mechanism and becomes visible as a function of the displacement of the cotter pin or that is free to slide within the aperture. . Advantageously, this display device has a colored part with a special mark.

In another form, the display element may slide within the opening and be displaced towards the rotary drive by the displacement of the cotter pin and finally into engagement.

The cotter pin is oriented axially, starting from the end of the blind hole-shaped cavity, remote from the rotary drive, and is provided with internal threads. A support pin is screwed into the space, and the support pin is rotatably mounted so as to have a region protruding from the cotter pin and is supported in the casing. The support pin area, which is guided to the casing cover, has an outer surface, which is preferably aligned with the casing. The outer surface is provided with a ring, which is suitably circular in shape and has an inner opening for receiving a transmission mechanism hook.

When the crank acts on the transmission mechanism, its rotational movement is transmitted via the hooks and rings to the support pin, which in turn transmits it to the cotter pin, which in turn causes the cotter pin of the perforated tube as a function of the direction of rotation. It moves out of or into the connection opening, which results in connection or release.

It is advantageous if a device is provided in the vicinity of the coupling mechanism which provides protection against mechanical damage, such a device being located, for example, above the coupling device and projecting laterally and radially. It may be configured as a welded arc stripper.

The advantage of the device according to the invention with a transmission for torque actuatable from the ground and with one connecting device per connecting opening fixed to the rotary drive is 6
This means that you can avoid the danger of climbing a ladder of ~ 8m and working there. The handling of this relatively simple device is not complicated and the coupling or disconnection work does not take long, so that the boring work can be performed quickly. Maintenance of the entire device does not cause any problems, and storage of the transmission mechanism, which only needs to be hooked to a particular connecting mechanism to connect and disconnect the perforated tube and the rotary drive, does not cause any problems.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the accompanying drawings.

FIG. 1 shows a transmission mechanism 1 as part of the device according to the invention for detachably connecting the perforated tube and the rotary drive.

At the lower end of the transmission mechanism 1 there is provided a hand crank 3 with a handle 5, the rotary movement of which is made possible by a nesting part 7 by means of a soldering steel cable 9 and a hook 11 (soldering to the cable 9). It is fixed by attaching).

This embodiment has two tubes as the nesting portion 7, but the number of nesting tubes is that length and the individual perforated tubes that must be connected to the rotary drive to make the perforated tube string. Depends on the length of. Holds the transmission mechanism 1 and cranks 3
The tubular sleeve that rotates the is not shown.

FIG. 2 is a schematic plan view of the connecting mechanism 20 in the axial direction, and FIG. 3 is a schematic sectional view taken along line III-III of FIG. The connection mechanism 20 is fixed to the outer wall of the rotary drive device 15 near the connection opening 24, and projects in the radial direction of the rotary drive device 15. The connecting mechanism 20 has a cylindrical casing 26 and a ring-shaped casing cover 22 provided at the tip of the casing 26. A cotter pin 28 and a support pin 36, which will be described in detail later, are provided in the casing 26 in the axial direction. The ring 30 is provided at the end of the support pin 36. The casing 26 is provided with a device 42 which indicates to the rotary drive 15 the connection of the perforated tube. This display device 4
2 is a perforated tube and a rotary drive device 15 not shown.
3 is a threaded pin showing the displacement of the linch pin or cotter pin 28 into the connection opening of FIG. As shown in FIG. 5, the display device 42 has its base end screwed to the cotter pin 28 and its front end provided with the slit 44 provided in the casing 26.
Projects outward through. And this display device 4
2 is a slit 4 along with the axial movement of the cotter pin 28.
The inside of 4 is moved in the direction shown by the arrow in the figure. This display device 4
When 2 slides to the specified position (indicated by A in the figure),
Due to the displacement of the cotter pin 28, it can be seen that it penetrates the opening 24 in the outer wall 15 of the rotary drive and the connecting opening of the perforated tube and that they are connected to each other.

An arcuate stripper 17 is fixed above the connecting mechanism 20 as a protection means for the connecting mechanism 20.

The arrow A in FIG. 2 indicates the direction of rotation of the ring 30, and the ring 30 is rotated by the transmission mechanism 1 acting as a drive shaft in conjunction with the rotation of the hook 11 (FIG. 1).

A non-rotating connecting element provided in the casing 26 of the connecting mechanism 20 and displaceable in the radial direction (axial direction of the casing 26) of the rotating drive device 15, that is, the rotating drive device side opening 24 for the cotter pin 28. Represents the connection opening of the rotary drive unit 15. Of the cotta pin 28,
The radial displacement from the opening 24 is set to at least the amount required for the insertion of the cotter pin 28 into the connecting opening of the perforated tube and thus the connection between the perforated tube and the rotary drive 15. The size of the opening 24 depends on the rotation prevention means,
Longitudinal groove 32 of casing 26 and cotter pin 2
8 and is determined by the adjusting spring 31 which is guided in the groove 32 by the thickness of the perforated tube (not shown).

This displacement of the cotter pin 28 is caused by the hook 11
It is caused by the operation of the crank 3 (Fig. 1) when the (Fig. 1) and the ring 30 are mutually locked and frictionally connected. This ring 30
The support pin 36 is fixed to the casing cover side end 34 by, for example, welding. The support pins 36 are mounted in the casing 26 by ball bearings 38 and supported in the casing cover 22 by the ends 34. The ring-shaped casing cover 22 is detachably connected to the casing 26 by, for example, a plurality of screw connection portions 40.

The torque transmission from the support pin 36 is performed by the tapered head 37 screwed into the blind hole-shaped inner hole 29 of the cotter pin 28 having the inner screw.

The arcuate stripper 17 is welded to the wall surface of the rotary drive device 15 above the connecting mechanism 20 and functions as a protective device for the connecting mechanism 20. The protection device may be of different construction.

FIG. 4 is a plan view of the coupling mechanism 20 in the radial direction of the rotary drive device 15. The casing cover 22 coupled to the casing 26 of the coupling mechanism 20 by the screw coupling portion 40 and the ring protruding in the radial direction. Thirty
One can see the end 34 of the support pin 36 with the fixed.

[0035]

In accordance with the present invention, the perforated tube is removably coupled to the rotary drive device in a relatively simple, manufacturable,
Limited maintenance and use, reduced work time, especially during drilling tubing, and avoids the risk of climbing ladders to considerable heights traditionally encountered by boring machine operators. It is possible to provide a device capable of doing so.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of a transmission mechanism.

FIG. 2 is a plan view in the axial direction of a connecting mechanism including a protection device.

FIG. 3 is a schematic cross-sectional view taken along the line III-III of FIG. 2 through a connecting mechanism.

FIG. 4 is a radial plan view of the coupling mechanism.

FIG. 5 is a schematic perspective view showing a display device of a coupling mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission mechanism 3 Crank 5 Handle 7 Nesting part 9 Steel cable 11 Hook 15 Rotary drive device 17 Bow stripper 20 Coupling mechanism 22 Casing cover 24 Opening 26 Casing 28 Cotta pin 29 Blind hole 30 Ring 32 Longitudinal groove 34 End Part 36 Support Pin 37 Tapered Head 40 Screw Connection Part 42 Display Device

Claims (9)

[Claims] 1. Rotating a perforated tube having a connecting opening
A device for removably connecting to a drive unit , comprising a connecting mechanism (20) formed on the rotary drive unit,
Can be connected to the connecting mechanism of the
And a torque transmitting mechanism (1) for transmitting, wherein the connecting mechanism, the rotary drive device by receiving a torque acting
Guided through the casing of the
Radial advance / retreat connection of the rotary drive into the mouth
And the torque transmission mechanism includes a variable angle element.
Device to collect. 2. The device according to claim 1, wherein the torque transmission mechanism (1) is configured as a crankshaft, which has at least one nesting part (7), the nesting part being movable in a variable angle. Device connected to a connecting hook (11). 3. The device according to claim 1, wherein
Angle as a variable element, the angle variable device characterized by joint or steel cables with flexible (9) is provided. 4. The device according to claim 1, wherein the torque transmission mechanism (1) and the coupling mechanism (2).
Ring (30) protruding in the radial direction of the rotary drive provided in the coupling mechanism (20) so that the hook (11) of the torque transmission mechanism (1) can be detachably coupled with the coupling mechanism (0).
A device characterized in that it can be inserted in a mutual locking frictional state. 5. The device according to claim 1, wherein the ring (3) in the coupling mechanism (20).
0) is fixed to a support pin axially mounted in the coupling mechanism (20), and the support pin has a tapered head (3
Device according to 7) screwed into the blind hole cavity (29) of the non-rotating cotter pin (28). 6. The device as claimed in claim 1, wherein the support pin (3) is provided via a bearing (38).
Device 6) is supported against the casing (26) of the coupling mechanism (20). 7. A device according to claim 1, wherein the rotation restraint of the cotter pin (28) is provided by a longitudinal groove (32) and a cotter pin (28) in the casing (26). Fixed adjustment spring (31)
A device characterized by being formed by. 8. The apparatus according to any one of claims 1 to 7, the display elements provided on the coupling mechanism (20) (42), connecting opening of the borehole tube by the displacement of the cotter pin (28) A device, characterized in that it shows a connection between the part and the rotary drive (15). 9. The apparatus according to any one of claims 1 to 8, the outer wall of the rotary drive (15), is provided with a form of protection devices bow-shaped stripper (17), which is connected A device which is fixed above the mechanism (20) and projects both radially and laterally.