JPS6187020A - Steel pipe sheet pile cutting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for cutting "-f'L fc copper pipe sheet piles driven into underwater ground, etc., at a predetermined level.

[Conventional technology and its problems]

Traditionally, the typical underwater cutting method for steel pipe sheet piles is
Discutter methods, grindstone cutter methods, oxygen arc fusing methods, etc. are known. However, among these methods, although the disk cutter method and the grindstone cutter method can properly cut the sheet pile g (copper pipe part), when trying to cut to the joint part, cutting continues in the circumferential direction of the copper pipe sheet pile, and the cutter Also, the inside of the joint is filled with sealing material, which may cause damage to the
When cutting the joint, the cutting resistance between the sealing material and the steel part (joint body) is different, which can also cause damage to the joint.

In addition, with the oxygen arc method, there is a problem in that if the concrete adheres to the intended cutting position and the rust builds up, it will cause arcing and rips in the middle, which will impede arc generation. It is necessary to remove adhering concrete paste and rust in advance, and cutting the joint as described above is particularly difficult due to such adhesion.

As described above, in all conventional methods, it is virtually difficult to cut the joints, and for this reason, the joints are subjected to some kind of pre-cutting process, which is called pre-cutting, based on the cutting position of the main sheet pile. is normal. However, due to problems with the ground, etc., the cutting position of the main sheet pile may not be as expected, and in this case, the meaning of the above pre-cut is lost and the steel pipe sheet pile above the n1 cutting position cannot be pulled out. Put it away.

The present invention addresses these problems of the conventional method and aims to provide a device that can appropriately cut the joint portion as well as the sheet pile main pipe.

[Means and operations for solving the problem] For this reason, the present invention employs a water jet cutting method and has the following specific configuration. That is, the present invention has a main body and a plurality of abutting members that can move forward and backward at a plurality of locations in the circumferential direction and vertical direction of the main body, and each of the abutting members is brought into pressure contact with the inner wall of the steel pipe sheet pile so as to be able to come into contact with and separate from the inner wall of the steel pipe sheet pile. It has a retaining means to be held in the body, has a female screw part at the upper end, has a water jet nozzle attachment part at the lower part, and is held in the center part of the main body through the upper part so as to be horizontally rotatable and slidable in the earthwork direction. a nozzle holder, a rotation fr)+ , l-<H device of the nozzle holder, and a device that is vertically and rotatably held by a fixed part on the main body side and screwed into the female screw part from the lower end side. A lifting drive device for a nozzle holder consisting of a screw shaft, a motor for driving the rotation of the screw shaft, and a clutch provided between the output shaft of the motor and the screw shaft, and a mounting portion of the front tube holder. Its basic characteristics are that it consists of a water jet nozzle which is arranged to be movable in the radial direction of the pipe pile, and a fluid supply means for supplying fluid such as high pressure water to the water jet nozzle from outside the apparatus.

Such a device is suspended from the upper end of the main sheet pile inside the main pipe, and is held in any cylinder within the main pipe by pressing each abutting member, which is a holding means, against the inner wall of the main pipe. The nozzle holder is moved up and down by a lifting drive, and the cutting position of the water jet nozzle is adjusted.

During the cutting process, the clutch of the lifting drive device may be disconnected.
The screw shaft is set so that it can rotate freely together with the nozzle holder, and the fluid supply means supplies high-pressure water, aprecip, etc. to the water jet nozzle, and at the same time, the nozzle holder is rotated by the rotary air blower FN. Cutting is performed by moving the blade.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The device of the present invention includes a main body (1), a holding means (2) for holding and fixing the main body to the inner wall of the main sheet pile pipe, a nozzle holder (3) that is rotatably and vertically slidable on the main body, and Rotation drive device for nozzle holder! (4) a nozzle holder lifting/lowering drive device (5), a water jet nozzle (6) attached to the nozzle holder, and a fluid supply means for supplying fluid to the water jet nozzle from outside the device (
7) consists of n5.

The main body (1) has an outer cylindrical part (8 inches) in the center, and a flange-shaped support part (9) Q(l) is provided at the upper and lower ends of the outer cylindrical part (8)
is formed.

The holding means (2) has contact members 0p which can move forward and backward in the radial direction of the main body (1) at a plurality of locations in the circumferential direction and the vertical direction of the main body (1). Hydraulic system (
6) The main body (1) is arranged at four positions in the circumferential direction of the upper and lower support portions (8) αq so as to be driven by the main body (1).

The nozzle holder (3) has an upper part structured as a cylindrical part 0, and a lower part has a mounting part α41 extending in the horizontal direction for mounting and storing a water jet nozzle. There is. Such a nozzle holder (3) is connected to the outer cylindrical part (1) of the main body (1) via the upper cylindrical part α3.
8) Bearing in a circle (15a) (151))! It is rotatably held through the. Further, a cylindrical portion α3 projecting upward from the outer cylindrical portion (8) is fitted with a diameter αQ, and a female screw portion α is provided at the upper end of the cylindrical portion α3.

The nozzle holder (3) can slide up and down with respect to the main body (1), so its cylindrical part α→ is in contact with the inner ring of the Daekia αQ and the bearing (ISA) (15b). In addition to being able to slide in the axial direction, these members are prevented from rotating relative to each other via keys, keyways, and splines.In this embodiment, the cylindrical part (2) has a keyway ( 131) is provided, and a key is provided in the mounting hole of the n1 large gear αQ and the inner surface of the bearing inner ring.

In addition, in this embodiment, the mounting portion 0 is a storage cylinder (18a) (18b)' which extends in the opposite direction. r, and each storage cylinder 0→ communicates with the cylindrical part αj.

Any number of storage cylinders α can be provided depending on the number of water jet nozzles to be provided.

The rotation drive device (4) is fixed to the main body (1).1. A small gear 91) is attached to the output shaft of the motor (a) so as to mesh with the Ohkia Be, and the n1 nozzle holder (3) can be rotated. ing. Incidentally, ``(Incorporated)'' is a turning position detector connected to the output shaft (■).

The elevating drive device (5) has a support section (9) of the main body (1).
) vertically and bearings (
A screw shaft (c) is held rotatably through a screw shaft (not shown) and is inserted into the female threaded portion 07) of the nozzle holder from its lower end, a motor for rotating the screw shaft (c), It consists of a clutch H) provided between the motor output shaft and the screw shaft. The power shaft (c) from the motor side and the screw shaft are connected to a bevel gear (
I have contacted you via (a)) (g). (31) is a bearing member.

The water jet nozzle (6) is installed in a storage cylinder α which is a mounting portion α at the bottom of the nozzle holder. In this embodiment, water jet nozzles (6a) and (6b) are installed in a pair of storage cylinders extending in opposite directions so that fluid can be injected onto the inner wall of the sheet pile main pipe in opposite directions.
is arranged. Each water jet nozzle (6)
is responsible for advancing and retracting the sheet pile in the radial direction, and for this reason, a slide base (32) is fixed to each storage cylinder ◇ ink pad fL,
The nozzle body (33) is slidably attached to the slide base (32) via slide fittings (30 pieces).The main body is fixed to the storage tube a way on the back of the slide fitting (34). The rod (36) of the cylinder device (35) is connected so that the nozzle body (33) can be made to come out and go out of the front opening (181) of the storage tube α, and can be moved forward and backward in the direction of the inner wall.

Figure 3 shows the cross-sectional structure of the nozzle body (33).
A nozzle hole (37) is formed at the tip, and a high-pressure water supply port (38) and an abrasion supply port (39) are separately provided at the rear.

The fluid supply means (7) is constituted by a flexible hose, and the hose is led from outside the device (*outside the pipe sheet pile) into the storage tube through the cylindrical part of the nozzle holder (3). It is connected to the nozzle body (33). Class 2a hoses are used for high-pressure water and apresip (abrasive material).

In other drawings, (40) is a suspension rope for suspending or hoisting the entire device inside the main sheet pile pipe.
1) It is connected to the top of the n.

Further, (41) is a stopper ring fixed to the cylindrical portion.

In addition, in the present invention, water jet nozzle (6) tm
By providing multiple nozzles in one direction, the cutting speed can be increased accordingly, and for this reason, the above-mentioned nozzles can be provided in three or more directions, but in some cases, it is also possible to have a configuration in which nozzles are provided in one location. It is.

Next, how to use the device of the present invention will be explained.

The device is suspended from the upper end of the main sheet pile pipe (A) by means of a hanging rope (40) to the intended cutting position inside the pile. Ql) is pushed out by the hydraulic system (2) n, % of the main sheet pile (A)
(a), thereby holding and fixing the device (a) against the inner wall (b).

In this state +;1. Fine level adjustment of I section is done.
In other words, the motor (c) of the lifting drive device (5) rotates the screw shaft (c) via the clutch (b) and the bevel gear, and by this, the p nozzle holder (3) The nozzle moves upward while sliding against the main body (1), and the nozzle position is adjusted. With conventional equipment,
The level Thu of such a cutting position must be achieved by completely releasing the holding means and raising and lowering it using a suspension rope, and the adjustment work required a long time, but with the device of the present invention, 5. Place the device body on the inner wall. It is possible to fix the level at 4 and then adjust the level while it remains in the next state, and the adjustment work can be done in a short time. Further, the nozzle body (33), which is in the retracted position within the storage cylinder (I frame), is advanced to approach the inner wall (a) to a predetermined position.

Next, the cutting operation begins; in this case, the clutch is first disengaged to allow the screw shaft H to rotate freely relative to the motor side. Then, high pressure water (3000-4000 Kg/'cn? 8 degrees) and abrasive water are supplied to the water jet nozzles (6a) and (6b) through the supply means (7), and the mixed fluid is sent from the nozzles to the sheet pile. Inject it toward the inner wall of the main pipe, and drive the motor of the rotation drive device (4).
The nozzle holder (3) is rotated through the large gear αet and the water jet nozzles (6a) and (6b)'
! The steel pipe sheet pile is cut in the circumferential direction by rotating the steel pipe sheet pile in the circumferential direction. The high-pressure water and apresive are fed under pressure to the nozzle via a pressure intensifier installed on the ground and a supply means (7). In this embodiment, cutting is completed when the nozzle holder (3) has rotated approximately 18 degrees.

In such a cutting method of the present invention, since the cutting means is a high-pressure fluid sprayed from a nozzle, the sheet pile main (A)
Appropriate cuts are made not only at the joints but also at the joints.

Note that in the present invention, any fluid can be selected as the fluid for the water jet nozzle, and for example, high-pressure water itself can be used as the cutting fluid.

[Efficacy of invention]

According to the present invention described above, f'L uses a surface pressure fluid injected from a water jet nozzle as a cutting means, and the jet nozzle can be appropriately rotated along the inner surface of the brass pipe sheet pile. It has the advantage of being able to appropriately and easily cut steel pipe sheet piles, including parts, in the local direction, and also being able to adjust the level for cutting while the main body of the device is fixed to the inner wall of the main sheet pile. Therefore, there is no need to pre-cut the joint part as in the conventional method, and cutting work can be carried out efficiently and reliably by simply performing level adjustment work in a short time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view, and FIG. 3 is a longitudinal sectional view of a nozzle body. In the figure, (1) is the main body, (2) is the holding means, and (3) is the main body.
is a nozzle holder, (4) is a rotating drive device, (5) is a lifting drive device, (6a) (6b) is a water jet nozzle, (7) is a fluid supply means, α is a contact member, and αη is a The female thread part, (c) shows the screw shaft, and ■ shows the clutch. Patent applicant: Nippon Kokan Co., Ltd. Inventor: Jun Hiroshi Kato Acting patent attorney: Sho Yoshihara
Kiyodai Takahashi 1
Figure 2

Claims (1)

[Claims] The main body has a plurality of abutting members that can move forward and backward in the circumferential direction and the vertical direction of the main body, and each of the abutting members is brought into pressure contact with the inner wall of the steel pipe sheet pile so as to be able to come into contact with and separate from the inner wall of the steel pipe sheet pile. It has a holding means to be held on the inner wall of the sheet pile, a female screw part at the upper end, a water jet nozzle attachment part at the lower part, and can be horizontally rotated and slid vertically through the upper part to the center of the main body. A held nozzle holder, a rotation drive device for the nozzle holder, a screw shaft held perpendicularly and rotatably by a fixed part on the main body side and screwed into the female threaded part from the lower end thereof; A lift drive device for a nozzle holder consisting of a motor for driving the rotation of the screw shaft and a clutch provided between the output shaft of the motor and the screw shaft, and a mechanism for advancing and retracting the copper pipe sheet pile in the radial direction at the mounting part of the nozzle holder. A steel pipe sheet pile cutting device comprising a water jet nozzle that can be arranged and a fluid supply means for supplying fluid such as high pressure water to the water jet nozzle from outside the device.