JPH05146825A - Device for correcting roundness of tube end part of steel tube sheet pile - Google Patents

Abstract

PURPOSE:To automatically press and straighten the deformation of a steel tube pile formed by welding and fixing a joint part to the side of the steel tube pile from the inside of the steel tube pile and to accurately straighten distorted deformation of the tube end part of the steel tube. CONSTITUTION:This device is provided with a pressing head reciprocating mechanism 32 which is mounted vertically movably on a column 6 of a self travelling carriage and advances a pressing head 22 with a hydraulic cylinder 15 pressing the inside face of the steel tub pile M to a prescribed position in the steel tube pile, a pressing head rotating drive 23 to rotate the pressing head 22 under a pressed state around the pipe axis X and a pipe diameter measuring means 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe used for straightening a pipe end portion of a steel pipe sheet pile when the steel pipe sheet piles are stacked in a plurality of stages in the pipe axis direction at a landfill site. The present invention relates to a roundness correcting device for a pipe end portion of a sheet pile.

[0002]

2. Description of the Related Art As is well known, sheet piles are used to form protective walls at landfill sites. Steel pipe sheet piles are used for strength reasons especially when the depth is deep. As shown in FIG. 4, the steel pipe sheet pile M is formed by providing a joint portion O on the side portion of the cylindrical steel pipe 2, and the joint portion O is provided with a slit P along the pipe axial direction. .. Then, the joint portion O of one steel pipe sheet pile M and the joint portion O of the other steel pipe sheet pile M are inserted into and engaged with both slits P to connect both steel pipe sheet piles M.

When forming a long steel pipe sheet pile, the steel pipe sheet piles M of a single pipe are sequentially welded and connected. However, since the steel pipe sheet pile M is deformed into an elliptical shape as indicated by a chain line with the direction corresponding to the joint O as the major axis, the pipe end is deformed due to thermal stress when welding and fixing the joint O to the steel pipe N. It becomes difficult to align the pipe ends of the steel pipe sheet pile.

For this reason, conventionally, an operator carries in a hydraulic cylinder device or the like into the pipe end portion of the steel pipe sheet pile M installed horizontally and vertically installs it at a deformed portion, and then operates the hydraulic cylinder device to operate the steel pipe. A pressure is applied from the inner surface side of the sheet pile M to the outside in the radial direction, after which the pipe diameter is measured, and this pressurization and pipe diameter measurement are repeated a plurality of times to correct the pipe end portion into a perfect circle. I was working.

[0005]

However, according to the above-mentioned conventional straightening method, since it is necessary for the operator to carry in and install the hydraulic cylinder device or the like into the steel pipe sheet pile M, the carrying-in of the hydraulic cylinder device or the like is required. And spend a lot of time on
It is easy for the hydraulic cylinder device or the like to be set at a predetermined position. Especially, since the hydraulic cylinder device applies pressure only in the vertical direction, it is difficult to correct the deformed one, and the operator sets the pressing force while measuring the pipe diameter at that time. Since this had to be done and repeated, the efficiency of the correction work was poor and the roundness accuracy was also poor.

The present invention has been made to solve the above-mentioned problems, and aims at automation of positioning, pressurizing control, pipe diameter measurement, etc. in a steel pipe sheet pile of a hydraulic cylinder device, etc., and relates to a deformed state of the steel pipe sheet pile. It is an object of the present invention to provide a straightening device for a pipe end portion of a steel pipe sheet pile, which can correct the pipe end portion easily and accurately.

[0007]

In order to achieve the above object, the present invention has a self-propelled carriage movable along the pipe axis of a steel pipe sheet pile installed in a horizontal direction, and a self-propelled carriage standing on the carriage. A pressure head that is supported so as to be able to move up and down on the column side and pressurizes the inner surface of the steel pipe sheet pile with a hydraulic cylinder device, and moves this pressure head so that it can move forward and backward along the pipe axis of the steel pipe sheet pile. A pressure head advancing / retreating mechanism for positioning at a position, a pressure head rotation driving mechanism for rotating a pressure head for pressing a predetermined position in the steel pipe sheet pile around the pipe axis, and a steel pipe sheet pile attached to the pressure head side. And a pipe diameter measuring means for measuring the pipe diameter at the pressurizing point.

[0008]

According to the present invention having the above-described structure, the pressure head having the hydraulic cylinder device is simply and accurately positioned and set at a predetermined position in the steel pipe sheet pile by the self-propelled carriage and the pressure head advancing / retreating mechanism. By further rotating the pressure head around the pipe axis, it is possible to properly correct even the distorted deformation of the steel pipe sheet pile, and the automatic measurement of the pipe diameter at the time of pressurization is achieved. The correction work can be speeded up and the correction can be performed accurately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are a side view and a front cross-sectional view excluding a pressing head portion, respectively, showing a pipe end roundness correcting device for a steel pipe sheet pile according to an embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a trolley, which travels on rails 2 laid along a pipe axis X of a steel pipe sheet pile M installed sideways via traveling wheels 3. The trolley 1 is provided with a motor 5 as a rotary drive mechanism device that transmits a rotational force to the traveling wheels 3 via the chain transmission mechanism 4 and the like, and is configured as a self-propelled trolley.

A gantry-shaped pillar 6 is erected on the trolley 1, and a movable block 8 connected to a lifting shaft 7 is held on the pillar so as to be lifted and lowered. The lifting shaft 7
Is attached to the upper side 6a of the pillar 6 and
The ball screw jack 10 driven by means is driven to move up and down, and the amount of vertical movement is an encoder 1 that detects the amount of rotation of the ball screw jack 10.
It is controlled by the output of 1. 12 is the movable block 8
Is a roller that is attached to and is guided by the support column 6.

The movable block 8 is provided with a shaft body 14 which is held by a rotor 13 mounted on the movable block 8 so as to be prevented from rotating and which can move back and forth along the pipe axis X of the steel pipe sheet pile M. A hydraulic cylinder device 15 that presses radially outward at a predetermined position in the steel pipe sheet pile M is attached to the tip of the shaft body 14 via a bracket 16 and a fixed shaft 17. Reference numerals 18 and 19 are pressure members, 20 is a load cell for measuring the load applied by the hydraulic cylinder device 15, and 21 is a potentiometer for detecting the operation amount of the hydraulic cylinder device 15. The hydraulic cylinder device 15
A pressure head 22 is configured by the pressure members 18, 19 and the like.

Reference numeral 23 is a pressure head rotation drive mechanism for rotating the pressure head 22 around the tube axis X of the steel pipe sheet pile M, and decelerates the rotational force of the motor 24 and the motor 24 to transmit the rotational force to the rotor 13. The reduction gear mechanism 25 and the like are provided, and the pressure head 22 is rotated at a low speed and a high torque via the rotor 13 and the shaft body 14. Two
Reference numeral 6 denotes a plurality of rollers mounted on the movable block 8 and rollingly supporting the rotor 13 on the outer peripheral side.

A guide body 27 for guiding the shaft body 14 so as to be able to move back and forth is laterally provided on the movable block 8.
The guide body 27 supports a screw feed shaft 28 for driving the shaft 14 forward and backward. Reference numeral 29 is a motor attached to the end of the guide body 27 via the pedestal 30, and 31 is a chain transmission mechanism for transmitting the rotational force of the motor 29 to the screw feed shaft 28. Head advancing and retreating mechanism 3 for advancing and retreating to a predetermined position of the steel pipe sheet pile M and positioning
2 is configured, and an encoder 33 is provided to detect the amount of forward / backward movement.

Reference numeral 34 denotes a pipe diameter measuring means, for example, a laser sensor, which is provided on the pressure head 22 side and measures the inner diameter of the pressed portion of the steel pipe sheet pile M at the time of pressurization, and the output and setting of this sensor 34. The pressing force is controlled by comparison with the value. Reference numeral 35 is a control box containing a controller (not shown) for controlling each mechanism, and 36 is a position detection sensor for detecting the moving position of the carriage 1, for example, a limit switch.

Next, the operation of the above configuration will be described. The steel pipe sheet pile M is deformed like a chain line when the joint member O is welded to the steel pipe N as shown in FIG. First, the motor 5 drives the wheels 3 to move the carriage 1 along the rails 2 to the pipe end portion of the steel pipe sheet pile M. The limit switch 36 detects that the carriage 1 has reached a predetermined position on the steel pipe sheet pile M. Then, the motor 9 drives the ball screw jack 10 to raise or lower the movable block 8 via the elevating shaft 7 so that the center of the pressing head 22 is aligned with the pipe axis X of the steel pipe sheet pile M. To do.

In this state, the motor 29 is driven to rotate the screw feed shaft 28 via the chain transmission mechanism 31 to advance the shaft body 14 supported by the movable block 8. The pressure head 22 is moved to the steel pipe sheet pile M by the shaft body 14.
Inserted inside. Since the encoder 33 detects the amount of rotation of the screw feed shaft 28, the amount of movement of the shaft body 14 is controlled from this amount of rotation, which causes the pressure head 22 to move as shown by the chain line in FIG. It is set at a predetermined position in the steel pipe sheet pile M. Here, since relatively heavy objects such as the pressure head 22 are mounted on the self-propelled trolley 1, relatively heavy objects such as the pressure head 22 can be easily transported to the steel pipe sheet pile M side. , Pressure head advancing / retreating mechanism 32
Thus, the pressure head 22 can be automatically and accurately positioned at a predetermined position in the steel pipe sheet pile M.

When the pressing head 22 is positioned at a predetermined position in the steel pipe sheet pile M, the hydraulic cylinder device 15 is operated to pressurize the inner surface of the steel pipe sheet pile M via the pressing members 18 and 19. The pressure load at this time is measured by the potentiometer 21 and adjusted. In this state, when the motor 24 is driven, the rotor 13 rotates via the reduction gear mechanism 25, so that the pressure head 22 also rotates around the pipe axis X of the steel pipe sheet pile M via the shaft body 14 as shown in FIG. Rotate. As a result, the radial strain of the steel pipe sheet pile M is corrected by the above pressing force. At this time,
The laser sensor 34 works to measure the inner diameter of the steel pipe sheet pile M, and based on this, the pressurizing operation is continued until the steel pipe sheet pile M reaches a predetermined roundness. Here, since the pressure head 22 is rotated, even if the steel pipe sheet pile M is deformed into a distorted shape, this can be properly corrected. Further, since the inner diameter of the steel pipe sheet pile M can be measured by the laser sensor 34 during the pressurizing operation by the pressure head 22, the straightening work can be performed with high efficiency and the steel pipe sheet pile M can be straightened with uniform accuracy.

When the correction of the steel pipe sheet pile M is completed, the pressing head 22 is retracted from the steel pipe sheet pile M by the procedure reverse to the above, and then the carriage 1 is also retracted from the steel pipe sheet pile M.

[0020]

As described above, according to the present invention, the pressure head mounted on the self-propelled carriage is automatically and accurately positioned and set at a predetermined position in the steel pipe sheet pile by the pressure head advancing / retreating mechanism. Furthermore, since the pressure head in a state where the steel pipe sheet pile is pressed from the inner surface is rotated by the pressure head rotating mechanism, even if the steel pipe sheet pile is deformed into a distorted shape, proper correction is possible. In addition, since pressure control is performed while automatically measuring the pipe diameter during pressure correction, correction with high accuracy can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of a pipe end roundness correcting device for a steel pipe sheet pile according to an embodiment of the present invention.

FIG. 2 is a front cross-sectional view showing a pipe end circularity correcting device for a steel pipe sheet pile according to an embodiment of the present invention, excluding a pressing head portion.

FIG. 3 is an explanatory diagram of an operation of correcting a steel pipe sheet pile by a pressure head.

FIG. 4 is a diagram illustrating a deformed state of a conventional steel pipe sheet pile.

[Explanation of Codes] 1 bogie 6 support 15 hydraulic cylinder device 22 pressure head 23 pressure head rotation drive mechanism 32 pressure head advancing / retreating mechanism 34 pipe diameter measuring means M steel pipe sheet pile X pipe axis

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[Procedure amendment]

[Submission date] February 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

When the correction of the steel pipe sheet pile M is completed, the pressing head 22 is retracted from the steel pipe sheet pile M by the procedure reverse to the above, and then the carriage 1 is also retracted from the steel pipe sheet pile M.
As described above, in this apparatus, the correction of the distorted steel pipe sheet pile into a perfect circle (appropriate shape) has been described in detail, but a cylindrical body of any shape is shaped into a predetermined shape (ellipse, etc.). It is also possible.

Claims (1)

[Claims] 1. A self-propelled trolley that can move along the pipe axis of a steel pipe sheet pile installed in a horizontal direction, and a hydraulic pressure on the inner surface of the steel pipe sheet pile that is supported so as to be able to move up and down on the side of a column that is erected on the trolley. A pressure head for applying pressure with a cylinder device; a pressure head advancing / retracting mechanism for moving the pressure head along the pipe axis of the steel pipe sheet pile so as to move the pressure head at a predetermined position of the steel pipe sheet pile; A pressure head rotation drive mechanism for rotating a pressure head for pressing a predetermined portion of the steel pipe sheet pile around the pipe axis;
A pipe end roundness correcting device for a steel pipe sheet pile, comprising: a pipe diameter measuring means attached to the pressure head side to measure a pipe diameter of a pressed portion of the steel pipe sheet pile.