JPH05146826A - Device for correcting roundness of pipe end part of steel pipe 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 securely straighten the distorted deformation at the pipe end part of the steel tube pile, especially, to uniformize the quality through adequate straightening in accordance with straightening amount and straightening patterns corresponding to the kinds. 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 provided with a hydraulic cylinder 15 pressing the inside face of the steel tube 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 and a data base which registers a straightening amount and a straightening pattern in accordance with the kind of the steel pipe sheet tube pile and can connect with a control program is mounted on a controller controlling each mechanism.

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 a side portion of a cylindrical steel pipe 2, and a slit P is formed in the joint portion O along the pipe axial direction. There is. 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 pressing force 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 such pressurization and pipe diameter measurement are repeated a plurality of times so that the pipe end portion becomes a perfect circle. I was doing some straightening work.

[0005]

However, according to the above-described conventional straightening method, it is necessary for an operator to carry in and install the hydraulic cylinder device or the like into the steel pipe sheet pile M, which is necessary for carrying in the hydraulic cylinder device or the like. In addition to spending a lot of effort and time,
It is easy for the setting of a hydraulic cylinder device or the like to shift to 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.

By the way, there are many types of steel pipe sheet piles that are actually handled, sometimes exceeding 100 types, and the correction pattern and the correction amount such as the correction position and angle are different values for each type of steel pipe sheet pile. Conventionally, the operator determines the optimum correction pattern and correction amount based on his experience and intuition, so when the type of steel pipe sheet pile changes, very high correction accuracy cannot be obtained at the beginning, especially for the operator. However, if the value changes, the correction results also vary greatly.

The present invention has been made to solve the above-mentioned problems, and aims at automation of positioning, pressurization control and pipe diameter measurement in a steel pipe sheet pile of a hydraulic cylinder device, etc., and is related to a deformed state of the steel pipe sheet pile. The pipe end can be straightened easily and accurately, and even if the type of steel pipe sheet pile changes, it is always properly and uniformly corrected according to the type to improve the quality. It is an object of the present invention to provide a pipe end roundness correcting device for a steel pipe sheet pile that can be achieved.

[0008]

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 to be able to move up and down on the pillar side and pressurizes the inner surface of the steel pipe sheet pile with a hydraulic cylinder device, and the pressure head is moved along the pipe axis of the steel pipe sheet pile so that the pressure head can move forward and backward. A pressure head advancing / retracting mechanism for positioning at a predetermined position in the sheet pile, a pressure head rotation driving mechanism for rotating a pressure head for pressing at a predetermined position in the steel pipe sheet pile around the pipe axis, and a pressure head side attachment It is provided with a pipe diameter measuring means for measuring the pipe diameter of the pressed portion of the steel pipe sheet pile, and the control device for controlling each of the above mechanisms registers and controls the correction amount and the correction pattern according to the type of the steel pipe sheet pile. A database that can be linked to a program In which the provided.

[0009]

According to the present invention having the above-described structure, the self-propelled carriage and the pressurizing head advancing / retreating mechanism allow the pressurizing head having the hydraulic cylinder device to be set easily and accurately at a predetermined position in the steel pipe sheet pile. 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. In particular, even if the number of types of steel pipe sheet piles is considerably large, the control device controls each mechanism according to the correction amount and correction pattern corresponding to the type of steel pipe sheet piles registered in the database, so Regardless of intuition, appropriate and accurate correction is always performed according to the type of steel pipe sheet pile.

[0010]

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 vertically movable. The up-and-down shaft 7 is attached to the upper side 6a of the column 6 and is driven up and down via a ball screw jack 10 driven by a motor 9. The amount of up-and-down movement is the rotation of the ball screw jack 10. Encoder 11 for detecting quantity
Controlled by the output of. A roller 12 is attached to the movable block 8 and guided by the 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 and which can be moved forward and backward along the pipe axis X of the steel pipe sheet pile M. A hydraulic cylinder device 15 that pressurizes 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 denotes a pressure head rotation drive mechanism for rotating the pressure head 22 around the pipe axis X of the steel pipe sheet pile M, and decelerating the rotational force of the motor 24 and the motor 24 to transmit the rotational force to the rotor 13. A reduction gear mechanism 25 and the like are provided, and the pressure head 22 is rotated at low speed and 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 is provided on the movable block 8 for guiding the shaft body 14 so that the shaft body 14 can move forward and backward.
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 is 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 pressure 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.

A personal computer 37, for example, is built in the control box 35 as a control device for automatically controlling each mechanism, and as shown in FIG. A database 102 for exchanging data is prepared. In the database 102, the correction amount determined based on the pipe diameter, the internal pressure, the joint position, etc. for each type of the steel pipe sheet pile M and set according to the type, and the correction pattern determined from the correction position and the pressing force are stored. With registration,
Setup change data and the like are also input, and the personal computer 37 takes in the data from the database 102 and executes the control program.

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 portion O is welded to the steel pipe N as shown in FIG. The operation of each mechanism is executed according to the control program of the personal computer 37. 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 inserted into the steel pipe sheet pile M by the shaft body 14. 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 carriage 1,
A relatively heavy object such as the pressure head 22 can be easily transported to the steel pipe sheet pile M side, and the pressure head advancing / retreating mechanism 32 automatically and accurately moves the pressure head 22 to a predetermined position in the steel pipe sheet pile M. Can be positioned.

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 moves 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 above pressurizing operation is continued until the steel pipe sheet pile M reaches a predetermined roundness. Here, since the pressing 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 in the reverse order of the above procedure, and then the carriage 1 is also retracted from the steel pipe sheet pile M.
When the type of the steel pipe sheet pile M is changed, the operator inputs the type of the steel pipe sheet pile M into the personal computer 37, and the data such as the correction pattern and the correction amount corresponding to the type is read from the database 102. The correction is performed accordingly. As a result, even if the type of the steel pipe sheet pile M changes, appropriate straightening corresponding to the type is automatically continued, and a product with high straightening accuracy can be uniformly obtained. In addition, the automation can be achieved by reading out the setup change data from the database 102.

[0022]

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. Further, since the pressure head in a state in which the steel pipe sheet pile is pressed from the inner surface is rotated by the pressure head rotating mechanism, even with respect to the distorted deformation of the steel pipe sheet pile, it is possible to perform appropriate correction, Further, since pressure control is performed while automatically measuring the pipe diameter during pressure correction, high-accuracy correction can be efficiently performed. Especially,
Since the correction amount and correction pattern according to the type of steel pipe sheet pile is registered in the database of the control device that controls each mechanism, even if the type of steel pipe sheet pile changes, the operator only needs to enter that type Appropriate correction is automatically performed, and quality uniformity can be realized.

[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 a conceptual diagram of a main part of a control device in the device.

FIG. 4 is an explanatory diagram of an operation of correcting a steel pipe sheet pile by a pressure head.

FIG. 5 is a diagram showing a modification of a conventional steel pipe sheet pile.

[Explanation of symbols]

 1 bogie 6 prop 15 hydraulic cylinder device 22 pressure head 23 pressure head rotation drive mechanism 32 pressure head advancing / retreating mechanism 34 pipe diameter measuring means 37 controller 102 database M steel pipe sheet pile X pipe axis

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[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 in the reverse order of the above procedure, and then the carriage 1 is also retracted from the steel pipe sheet pile M.
When the type of the steel pipe sheet pile M is changed, the operator inputs the type of the steel pipe sheet pile M into the personal computer 37, and the data such as the correction pattern and the correction amount corresponding to the type is read from the database 102. The correction is performed accordingly. As a result, even if the type of the steel pipe sheet pile M changes, appropriate straightening corresponding to the type is automatically continued, and a product with high straightening accuracy can be uniformly obtained. In addition, the automation can be achieved by reading out the setup change data from the database 102. 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;
With a pipe diameter measuring means attached to the pressure head side to measure the pipe diameter of the pressurizing portion of the steel pipe sheet pile, the control device for controlling each mechanism, the correction amount according to the type of the steel pipe sheet pile and A straightening device for a pipe end portion of a steel pipe sheet pile, wherein a database capable of registering a straightening pattern and connecting it to a control program is provided.