KR20190046102A - Method for steel pipe head cutting and arranging - Google Patents

Abstract

The present invention relates to a steel pipe head cutting and arranging method as a method for cutting a head of a steel pipe which is installed in the ground and exposed to the ground and arranging the cut steel pipe. The steel pipe head cutting and arranging method comprises: a display step of irradiating the exposed head of the steel pipe with a laser to display a cutting position; a moving step of moving a cutting means for cutting the steel pipe by gas or plasma and a fixing means for holding the cutting means in a state in which the cutting means is disposed on the steel pipe by a moving means to the steel pipe; a recognition step of receiving the laser reflected on the head of the steel pipe and recognizing the position where the laser is reflected on the steel pipe as a cutting position; a disposing step of disposing the cutting means at the cutting position of the steel pipe by the fixing means; a cutting step of performing a cutting operation by the cutting means along the circumference of the steel pipe based on the cutting position; and an arranging step of lifting the cut portion of the steel pipe in a state where the fixing means is fixed to the cut portion of the steel pipe, moving the cut portion to a loading place, and arranging the cut potion. The present invention can shorten the working time, reduce the labor force, and improve the efficiency of the cutting operation and work productivity in cutting the head of the steel pipe exposed to an upper part of the ground, can ensure the horizontal quality of the cut surface during the cutting operation of the head of the steel pipe, and can prevent a safety accident when cutting the head of the steel pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for cutting and arranging a steel pipe head,

More particularly, the present invention relates to a method for cutting and cleaning a steel pipe head, which is capable of cutting a exposed head of a steel pipe by using a gas or a plasma after marking a cutting position on the steel pipe, The present invention relates to a method of cutting and arranging a head.

In general, foundation work is preceded by foundation pile construction in order to secure the supporting capacity of the ground.

Steel pipes may be used for the files used in foundation work.

In order to put the steel pipe, firstly, a hole is formed with a digging drill and a method of embedding it (embedding type method) or a method of embedding it directly in the ground with a hanger (type type method) is used. Thereafter, when the embedding or type work of the steel pipe is completed, the steel pipe is pushed up to a predetermined depth where the foundation work is performed. At this time, the head of the buried steel pipe is cut.

The work process of the above steel pipe can be divided into three types: penetration of the pile using the embedding type / type method, head part of the upper part of the steel pipe, and securing of the supporting force by connecting the ground and upper structure. Here, the theorem of the upper part of the steel pipe is to cut the upper part of the steel pipe in order to adjust the level of the foundation in the pile foundation construction after the penetration of the steel pipe into the ground.

When cutting the upper part of the steel pipe as described above, the operator cuts the steel pipe pile directly by using a gas cutting machine, marks the cutting line through the measurement, and attaches the head reinforced steel cap to the upper part of the cut surface, And a method of cutting steel pipe piles using an automatic cutter using gas or plasma by installing a cutting assistant device on the outer or inner peripheral surface of the steel pipe pile after the cutting line marking on the steel pipe pile

There is a problem that the accuracy of the position display in which the worker manually proceeds to display the cutting position is deteriorated.

In addition, when the worker cuts directly by a cutter, there are problems such as occurrence of a safety accident (such as a pincushion), occurrence of a safety accident such as a labor strike or an electric shock accident, and a horizontal state failure of a cutting surface according to skill of a laborer.

In the case of cutting a steel pipe pile using an automatic cutter, the guide rail used in the automatic cutter may be deformed or the durability of the cutting device may be deteriorated due to the high heat generated in the automatic cutter, There is a problem of non-uniformity. In addition, since the automatic cutter must be repeatedly installed and dismantled on the steel pipe, there is a problem that productivity and convenience are deteriorated.

In addition, in order to arrange the cut portion of the steel pipe, it is required to insert a predetermined lifting equipment into the cutting operation.

Particularly, when the length of the steel pipe to be cut is long, it is necessary to cut the steel pipe several times in order to facilitate the movement and arrangement, and thus it is difficult to ensure work productivity and convenience.

In addition, in order to lift the steel pipe, the steel pipe is lifted by using a rope to a predetermined lifting machine. However, there is a problem that a falling accident occurs due to a problem such as loosening of the rope.

The prior art of the present invention is exemplified by the registered patent 10-0978374.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method of cutting a steel pipe exposed at an upper portion of a paper surface by irradiating a laser beam to a steel pipe at a position spaced apart from the steel pipe, And to provide a method of cutting and arranging a head of a steel pipe which can be carried out.

It is another object of the present invention to provide a method of cutting and arranging a steel pipe to be cut in which cutting quality is secured by moving at a constant speed around a steel pipe during a cutting operation of a head of a steel pipe, .

In addition, the present invention is characterized in that a fixing means fixed to a steel pipe is connected to an arm end of an excavator so as to perform stable cutting during a cutting operation of the steel pipe, and at the same time, The present invention provides a method of cutting and arranging a steel pipe head which can be moved by moving the steel pipe to a predetermined position.

According to an aspect of the present invention, there is provided a method of cutting a head of a steel pipe exposed to the ground and cutting a cut steel pipe, the method comprising: irradiating a head of the exposed steel pipe with a laser to display a cutting position ; A moving step of moving cutting means for cutting the steel pipe by gas or plasma and fixing means for holding the cutting means in a state in which the cutting means is disposed on the steel pipe by the moving means to the steel pipe; A recognition step of receiving the laser reflected on the head portion of the steel pipe and recognizing the position where the laser is reflected on the steel pipe as a cutting position; A disposing step of disposing the cutting means at a cutting position of the steel pipe by the fixing means; A cutting step of performing a cutting operation by the cutting means along the circumference of the steel pipe based on the cutting position; And a cleaning step of lifting the cut portion of the steel pipe in a state where the fixing means is fixed to the cut portion of the steel pipe and moving the cut portion to the loading place and arranging the cut portion.

The display step may be carried out by a laser leveler disposed at a position spaced apart from the steel pipe.

The recognition step may be performed by the laser receiver that receives the laser reflected from the surface of the steel pipe and outputs a signal corresponding to the laser reflection position.

The moving means may comprise an excavator.

The fixing means and the cutting means may be connected to the arm of the excavator.

The cutting means may include a gas cutter or a plasma cutter that moves along the circumference of the steel tube and performs cutting.

The fixing means includes a first fixing portion connected to an end portion of the excavator arm and a second fixing portion connected to an end portion of the excavator arm and spaced apart from the upper portion of the first fixing portion by a predetermined distance, 2 < / RTI >

The first fixing part and the second fixing part may be in the form of a clamp which surrounds the outer circumference of the steel pipe on both sides of the steel pipe.

The first fixing part and the second fixing part may be fixed to the outside of the steel pipe in a hydraulic cylinder.

According to the present invention as described above, a laser beam is irradiated to a steel pipe at a position spaced apart from the steel pipe during a cutting operation of the steel pipe exposed at the top of the ground, and the cutting position is displayed.

Further, according to the present invention, during the cutting operation of the head of the steel pipe, the steel pipe is moved at a constant speed around the steel pipe, and cutting is performed, thereby ensuring the cutting quality of the steel pipe cut surface.

In addition, the present invention is characterized in that a fixing means fixed to a steel pipe is connected to an arm end of an excavator so as to perform stable cutting during a cutting operation of the steel pipe, and at the same time, The steel pipe can be moved to a predetermined position and loaded.

1 is a flowchart showing the construction of a method of cutting and arranging a steel pipe head according to the present invention.
FIG. 2 is a view showing a configuration of a head cutting and sorting apparatus used for performing the method of cutting and arranging the steel pipe head shown in FIG. 1. FIG.
3 is a perspective view showing the connection relationship between the cutting means and the fixing means used in the present invention.
4 is a bottom perspective view showing the connection relationship between the cutting means and the fixing means used in the present invention.
5 and 6 are views showing a steel pipe cutting operation according to the present invention.
7 and 8 are views showing the movement and loading of the cut steel pipe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart showing the construction of a method of cutting and arranging a steel pipe head according to the present invention.

1, a method of cutting and arranging a steel pipe head according to an embodiment of the present invention includes a display step ST110, a movement step ST120, a recognition step ST130, a placement step ST140, a cutting step ST150, , And an organizing step (ST160).

FIG. 2 is a view showing a configuration of a head cutting and sorting apparatus used for carrying out the method of cutting and arranging the steel pipe head shown in FIG. 1, and is an example of a connection relationship between a laser level machine, cutting means, .

The display step ST110 is a step of displaying the cutting position with respect to the exposed head of the steel pipe 1 which is the object of cutting work.

Here, the cut position indication may be performed using a laser leveler 110 for irradiating a laser having a predetermined output and a predetermined wavelength.

That is, after the laser leveler 110 is disposed at a position spaced apart from the steel pipe 1, which is the object of cutting work, the laser leveler 110 is operated to irradiate a laser beam to the cut position of the steel pipe 1 The cutting position can be displayed. The irradiated laser beam is reflected on the surface of the steel pipe 1, and the reflected laser beam can be recognized by using a predetermined recognition device. This will be described later.

2, the cutting position is indicated by a line along the circumference of the steel pipe 1. This is to indicate that cutting is performed along the cut position irradiated with the laser, But does not leave a predetermined physical marking at the cutting position of the steel pipe 1. In this case,

The moving step ST120 is a step of moving the cutting means 130 and the fixing means 140 around the steel pipe 1 by using a predetermined moving means. Here, the moving means may include an excavator 150.

A connecting body 154 having a substantially hexahedron shape may be disposed at an end of the arm 152 of the excavator 150 to facilitate connection of the cutting means 130 and the fixing means 140 to be described later.

The cutting means 130 and the securing means 140 may be connected to the end of the arm 152 of the excavator 150.

The cutting means 130 and the fixing means 140 will be described later.

The recognition step ST130 is a step of recognizing the position where the laser beam is reflected by the steel pipe 1 as a cutting position after the laser beam is irradiated from the laser leveler 110 to the steel pipe 1, .

The cutting position recognition can be performed by the laser receiver 120 which receives the reflected laser included in the cutting means 130 described later in the steel pipe 1. [ Here, since the laser receiver is a publicly known technology such as that disclosed in Japanese Patent Laid-open No. 10-1689268, a detailed description thereof will be omitted.

The laser receiver receives a laser beam reflected from the steel pipe 1 and then outputs a signal corresponding to a position where the laser beam is reflected on the steel pipe 1. [

The placing step ST140 is a step of placing the cutting means 130 used for cutting the steel pipe 1 by the predetermined fixing means 140 at the cutting position on the steel pipe 1 and maintaining the arrangement state thereof.

The cutting means 130 and the fixing means 140 are connected to the end of the arm 152 of the excavator 150 so that when the fixing means 140 is fixed to the steel pipe 1, 1). When the cutting means 130 and the fixing means 140 are arranged, the cutting means 130 is preferably arranged on the cutting position recognized in the recognition step ST130.

During the cutting operation of the steel pipe 1, the fixing means 140 is held in a fixed state on the steel pipe 1, and the cutting means 130 can also maintain the position.

The cutting step ST150 is a step of cutting the steel pipe 1 around the steel pipe 1 based on the cutting position in the steel pipe 1 recognized by using the laser receiver 120 .

Here, the cutting means and the fixing means will be described.

Fig. 3 is a perspective view showing the connection relationship between the cutting means and the fixing means used in the present invention, and Fig. 4 is a bottom perspective view showing the connection relationship between the cutting means and the fixing means used in the present invention.

3 and 4, the cutting means 130 includes a laser receiver 120, first and second cutting arms 131 and 132, a moving rail 134, and a plasma cutter 136.

The laser receiver 120 receives the laser reflected from the surface of the steel pipe 1 after being irradiated to the steel pipe 1 from the position display unit 110 and recognizes the position where the laser beam is reflected by the steel pipe 1 as a cut position And outputs a predetermined signal indicating the cutting position.

The laser receiver 120 is disposed in front of the connector 154 and may be disposed between the first and second cutting arms 131 and 132 and the first fixing unit 140A described later.

At this time, it is preferable that the laser receiver 120 is arranged as close as possible to the plasma cutter 136, which will be described later, which performs the cutting operation.

One end of each of the first and second cutting arms 131 and 132 is rotatably connected to both ends of the arm 152 of the excavator 150 by a connecting body 154, (1). ≪ / RTI > Here, the first and second cutting arms 131 and 132 may be in the form of a clamp having the same size and curvature.

The first and second cutting arms 131 and 132 are connected to the first and second clamp arm operating portions 143A and 144A described later so that the first and second cutting arms 131 and 132 are connected to the first and second cutting arms 131 and 132, The first and second clamp arm actuating portions 143A and 144A may be arranged to surround the steel pipe 1 according to the operation of the second clamp arm actuating portions 143A and 144A.

At this time, the inner circumference of the first and second cutting arms 131 and 132 may be spaced apart from the outer circumferential surface of the steel pipe 1 by a predetermined distance.

The movable rail 134 is bent and formed into an arc shape having a predetermined curvature. The moving rail 134 is disposed movably along the first and second cutting arms 131 and 132 at the lower portion of the first and second cutting arms 131 and 132. [ At this time, it is preferable that the curvature of the movable rail 134 is equal to the curvature of the first and second cutting arms 131 and 132 to facilitate the movement of the movable rail 134. A predetermined motor (not shown) may be disposed for movement of the movable rail 134.

The moving rail 134 moves along the circumference of the steel pipe 1 at a lower portion of the first and second cutting arms 131 and 132 so that a steel pipe cutting operation by the plasma cutting machine 136 described later can be performed.

The plasma cutter 136 is disposed toward the steel pipe 1 from the lower portion of the movable rail 134.

The plasma cutter 136 may be disposed in at least one or more numbers below the movable rail 134.

In the plasma cutter 136, a predetermined plasma is generated to perform a cutting operation on the steel pipe 1. When the plasma is generated in the plasma cutter 136, the movable rail 134 can move at a predetermined speed under the first and second cutting arms 131 and 132.

Here, although it is described that the plasma cutting machine is used for cutting the steel pipe, a gas cutting machine may be used according to the user's need.

In addition, the securing means 140 is connected to the end of the arm 152 of the excavator 150. At this time, the fixing means 140 is disposed at a position higher than the cut portion 130. Therefore, when the steel pipe 1 is cut at a predetermined position, the fixing means 140 is held in a fixed state on the cut portion of the steel pipe 1. [

The securing means 140 includes a first securing portion 140A and a second securing portion 140B which are disposed at upper and lower ends of the arm 152 of the excavator 150 at a certain distance from each other.

The first fixing portion 140A is connected to the end of the arm 152 of the excavator 150 and is fixed on the outer circumference of the steel pipe 1 during the cutting operation.

The first fixing portion 140A includes first and second clamp arms 141A and 142A and first and second clamp arm operation portions 143A and 144A.

The first and second clamp arms 141A and 142A have a predetermined size and are in the form of a clamp that closely surrounds the outer circumference of the steel pipe 1 on both sides and is rotatably connected to both ends of the arm 152 of the excavator 150 do. The first and second clamp arms 141A and 142A preferably have the same size and shape.

It is preferable that the diameters of the first and second clamp arms 141A and 142A are formed to correspond to the diameter of the steel pipe 1.

Each of the first and second clamp arm operating portions 143A and 144A is connected at one end to one end of the arm 152 of the excavator 150 and the other end is connected to the rear of the first and second clamp arms 141A and 142A Lt; / RTI > Therefore, the first and second clamp arms 141A and 142A can clamp the steel pipe 1 by the operation of the first and second clamp arm operating portions 143A and 144A.

The first and second clamp arm actuating portions 143A and 144A are connected to the first and second cutting arms 131 and 132 at the other lower end thereof so that the first and second clamp arm actuating portions 143A and 144A The first and second cutting arms 131 and 132 may be arranged to surround the cutting position of the steel pipe 1 in cooperation with the operation of the first and second cutting arms 131 and 132.

The first and second clamp arm operating portions 143A and 144A may include a hydraulic cylinder.

The second fixing part 140B is connected to the end of the arm 152 of the excavator 150 and is disposed at a distance from the upper part of the first fixing part 140A.

The second fixing portion 140B is fixed to the portion to be cut of the steel pipe 1 together with the first fixing portion 140A so that the steel pipe 1 is cut so that the cut portion can be balanced and moved .

The second fixing portion 140B includes third and fourth clamp arms 141B and 142B and third and fourth clamp arm actuating portions 143B and 144B.

In the figure, the first and second clamp arms 141A and 142A include two unit arms, and the third and fourth clamp arms 141B and 142B are shown to include a single unit arm, The number of unit arms included in the clamp arm of the first embodiment can be variously set according to the needs of the user.

The third and fourth clamp arms 141B and 142B and the third and fourth clamp arm operation portions 143B and 144B are connected to the first and second clamp arms 141A and 142A, (143A, 144A), detailed description thereof will be omitted.

Here, it is preferable that the first and second clamp arm actuating parts 143A and 144A and the third and fourth clamp arm actuating parts 143B and 144B cooperate with each other.

5 and 6 are views showing a steel pipe cutting operation according to the present invention.

5, a cutting means 130 and a fixing means 140 are disposed on a steel pipe 1, and the plasma cutting device 136 is disposed toward a cutting position.

6, a moving rail 134 is moving along the first and second cutting arms 131 and 132 below the first and second cutting arms 131 and 132 and the plasma cutter 136 is moved along the first and second cutting arms 131 and 132, It is shown that the steel pipe 1 is cut along the circumference thereof.

The rounding step ST160 is a step of moving the steel pipe 1A cut by the cutting means 130 to a predetermined position and then stacking the steel pipe 1A.

The clean-up step (ST160) can be performed as follows.

7 and 8 are views showing the movement and loading of the cut steel pipe.

When the cutting operation for the steel pipe 1 is completed, the fastening means 140 lifts the cut steel pipe 1A while being fixed to the cut steel pipe 1A.

Thereafter, the operator moves the excavator 150 to a predetermined position where the steel pipe is arranged. At this time, if the length of the cut steel pipe 1A is more than a predetermined length, the operator moves the position of the fixing means 140 to the intermediate portion of the cut steel pipe 1A, So that the fixing means 140 including the pipe 140B is fixed to the middle portion of the cut steel pipe 1A.

Referring to FIG. 8, it can be seen that the steel pipe 1 is moved to a predetermined position in a state where the first and second fixing portions 140B hold the cut steel pipe 1A.

Here, the second fixing portion 140B is installed so as to be movable in a direction away from the first fixing portion 140A so as to grasp the cut steel pipe 1A more stably. When the cutting operation is completed, the second fixing part 140B unravels the steel pipe and moves in a direction away from the first fixing part 140A (upward direction in FIG. 7) Retain again. In this case, the gap between the first fixing part and the second fixing part is sufficiently secured, and the steel pipe can be transported in a state of holding it more stably. A moving actuator such as a hydraulic cylinder for transferring the first fixing part to the first fixing part may be mounted on one side of the second fixing part.

When the steel pipe 1A cut by the operation of the arm 152 of the excavator 150 is rotated and moved horizontally, the cut steel pipe 1A can be moved and stacked while maintaining the balance.

Thereafter, the operator can rotate the arm 152 of the excavator 150 to keep the steel pipe 1 horizontal, and then load and collect the steel pipe 1 in order.

According to the present invention as described above, a cutting operation can be performed by displaying a cutting position by displaying a laser beam on a steel pipe at a position spaced apart from the steel pipe during a cutting operation of the steel pipe exposed at the top of the ground, The cutting quality of the cut surface of the steel pipe can be secured by cutting the steel pipe at a constant speed around the steel pipe during the cutting operation of the steel pipe. In addition, the present invention is characterized in that a fixing means fixed to a steel pipe is connected to an arm end of an excavator so as to perform stable cutting during a cutting operation of the steel pipe, and at the same time, The steel pipe can be moved to a predetermined position and loaded.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Cutting and arranging of steel pipe head
110: Excavator stage body 120: Laser receiver
130: cutting means 140: fixing means
150: Excavator

Claims (9)

A method for cutting a head of a steel pipe which is installed in the ground and exposed to the ground,
A display step of irradiating a head of the exposed steel pipe with a laser to display a cutting position;
A moving step of moving cutting means for cutting the steel pipe by gas or plasma and fixing means for holding the cutting means in a state in which the cutting means is disposed on the steel pipe by the moving means to the steel pipe;
A recognition step of receiving the laser reflected on the head portion of the steel pipe and recognizing the position where the laser is reflected on the steel pipe as a cutting position;
A disposing step of disposing the cutting means at a cutting position of the steel pipe by the fixing means;
A cutting step of performing a cutting operation by the cutting means along the circumference of the steel pipe based on the cutting position;
And a cleaning step of lifting the cut portion of the steel pipe in a state where the fixing means is fixed to the cut portion of the steel pipe, and moving the cut portion to the loading place. The method according to claim 1,
In the displaying step,
And a laser leveler disposed at a location spaced apart from the steel pipe. 3. The method of claim 2,
Wherein,
And a laser receiver for receiving the laser reflected from the surface of the steel pipe and outputting a signal corresponding to a laser reflection position. The method according to claim 1,
Wherein the moving means includes an excavator. 5. The method of claim 4,
Wherein the fixing means and the cutting means comprise:
And cutting and arranging the steel pipe to be connected to the arm of the excavator. 5. The method of claim 4,
The cutting means includes:
And a gas cutter or a plasma cutter moving along the periphery of the steel pipe and performing cutting. 5. The method of claim 4,
Wherein,
A first fixing part connected to an end of the excavator arm,
And a second fixing part connected to the end of the excavator arm and spaced apart from the upper part of the first fixing part and interlocked with the first fixing part. 8. The method of claim 7,
Wherein the first fixing part and the second fixing part comprise:
And a tongue-like cut-away portion for covering the outer periphery of the steel pipe at both sides of the steel pipe. 9. The method of claim 8,
After the cutting step, the second fixing portion unclamps the steel pipe, moves in a direction to separate the first fixed rotor, and then grasps the steel pipe again, and then cuts and arranges the steel pipe to move the steel pipe .

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