KR20030072690A - Apparatus for pipe clamping of pipe welding machine - Google Patents

Abstract

PURPOSE: A pipe clamping device for a pipe welder is provided to reduce the size and weight of a cylinder rod and a cylinder by distributing load applied to the cylinder rod into a guide rod. CONSTITUTION: A pipe clamping device includes a supporter, at least one fixing clamp(10), at least one moving clamp(30), at least one guide rod(110), and at least one pair of cylinders(81,82) and cylinder rods(71,72). The fixing clamp(10) is fixed to the supporter. The moving clamp(30) relatively moves with respect to the fixing clamp(10). The guide rod(110) is fixed to the fixing clamp(10) in order to guide a moving route of the moving clamp(30). The cylinders(81,82) and the cylinder rods(71,72) are fixed to both fixing clamp(10) and the moving clamp(30) so as to supply driving force to the moving clamp(30).

Description

Apparatus for pipe clamping of pipe welding machine}

The present invention relates to a pipe clamping device of a pipe fusion machine, and more particularly, to reduce the overall size by improving the structure of the clamping device, and to reduce the weight and to secure the fusion of the pipe by removing the unstable elements such as twisting of the pipe during welding It relates to a pipe clamping device that can be made.

Pipe pipes have recently been widely used in city gas pipes, transport pipes for various chemicals, and various drain pipes, and many researches have been conducted on fusion technologies for welding pipe sections to connect these pipes and applying heat to them. Development is taking place.

1 is a perspective view for showing the overall structure of a conventional pipe welding machine.

Figure 1 shows a structure of a general pipe welding machine, a clamping device for firmly supporting the pipe (P1) (P2) so as not to move during the welding operation, and the cross-section of the pipe (P1) (P2) chamfered contact respectively Chamfering means (F) for improving the welding efficiency by increasing the area, and heating means (not shown) interposed in the cross section of the pipe (P1) (P2) to melt the cross section of the pipe (P1) (P2) It is.

The clamping device is hydraulically driven about the first and second cylinder rods 131 and 132 having a predetermined length and arranged in parallel, and the first and second cylinder rods 131 and 132. A plurality of semi-circular clampers lower surfaces 135, 136, and 137, which are fixed at predetermined intervals to the cylinders 133 and 134 which are moved by each other, to support one side of the pipes P1 and P2 , (138) and a plurality of semicircular split type clamper upper surfaces coupled to the clamper lower surfaces 135, 136, 137, and 138, respectively, to support the other sides of the pipes P1 and P2. 139, 140, 141, and 142 and the clamper upper surfaces 139, 140, 142, and 143, respectively, coupled to both sides of the clamper upper surfaces 139, 140, and 141. ), (142) clamping knobs (144), (144 '), (145), (145'), (146) for fixing to the clamper bottom (135), (136), (137) and (138) , 146 ', 147, and 147'.

A series of processes for welding the pipes P1 and P2 using the general pipe welder as described above will be described.

The state between the clamping lower surfaces 135, 136, 137 and 138 and the clamper upper surfaces 139, 140, 141 and 142 via the pipes P1 and P2. Clamping top (139), (140), (141), (142) on both sides of the tightening knobs (144, (144 '), (145), (145'), (146), (146 '), ( 147 and 147 'are tightened to firmly fix the pipes P1 and P2, respectively.

In this manner, in the state where the pipes P1 and P2 are fixed with the clamping device, the both ends of the pipes P1 and P2 are chamfered by the chamfering means F, and then the pipes P1 and P2 are again heated by the heating means. Both end surfaces are heated and melted, and the pipes P1 and P2 are pressurized and welded with a predetermined force to face the inside.

After that, both end surfaces of the pipes P1 and P2 are connected and fixed in a solid state by welding, and the work is completed by removing the clamping device from the pipes P1 and P2.

At this time, for fusion operation, the joining of both chamfered and heated sections is performed by the movement of the cylinder rods 131 and 132 and the hydraulic cylinders 133 and 134 which are moved by hydraulic pressure around the cylinder rod. . The hydraulic cylinders 133 and 134 are fixedly coupled to the clamper lower surfaces 135 and 136 on the pipe P1 side, and the cylinder rods 131 and 132 are clamper lower surfaces for fixing the pipe P2. 137 and 138, but the cylinders 133 and 134 are reciprocated by hydraulic action about the cylinder rods 131 and 132, and thus the clamper lower surfaces 135 and 136. Reciprocates with respect to the lower surfaces 137 and 138 of the clamper, and presses them in the face-to-face contact direction at the time of joining.

However, in order to be fusion-bonded to each other in the conventional pipe fusion machine, the cylinders 133 and 134 reciprocate along the cylinder rods 131 and 132 with a clamping device fixed to the pipe P1. Since the movement of the cylinder rods 131, 132 becomes large, the weight is much. In addition, the cylinder rods 131 and 132 reciprocate the cylinders under heavy load, thereby causing damage to the surface of the cylinder rods.

In addition, tighten the tightening knobs 144, 144 ', 145, 145', 146, 146 ', 147, and 147' to fix the pipes P1 and P2. In the process of tightening, there is a difference in the degree of tightening, the non-uniformity, the fixing clamps are lifted up in the process of tightening occurs, the pipe contact surface is distorted, the correct fusion does not occur.

Therefore, the present invention is to solve such problems, an object of the present invention is to distribute the load on the cylinder rod to the guide rod to reduce the size of the cylinder rod and cylinder to reduce the overall size and weight of the pipe To provide a pipe clamping device of the welding machine.

In addition, the pipe clamping device of the pipe fusion splicer to equalize the pressure applied to the pipe by the tightening handle, and to prevent the phenomenon that the pipe shape is distorted when the clamp placed below is lifted when the clamps are tightened by the tightening handle. It is to provide.

1 is a perspective view for showing the overall structure of a conventional pipe welding machine.

Figure 2 is a perspective view for showing the overall configuration of one embodiment of the present invention. 3 is a front view of one embodiment of the present invention.

4 is a rear view of an embodiment of the present invention.

5 is a cross-sectional view taken along the line AA ′ of FIG. 4.

Features of the present invention for achieving the above objects,

Pedestal formed on the bottom;

At least one fixing clamp fixed to the pedestal;

At least one movable clamps which are in relative motion with respect to the fixed clamps;

At least one guide rod fixed to the fixed clamps and configured to guide a movement path of the movable clamps through a portion of the movable clamps;

And at least one pair of cylinders and cylinder rods fixed to the fixed clamp and the movable clamp to provide power to cause the relative movement of the movable clamp relative to the fixed clamp.

Further, in the present invention, the fixed clamps and the movable clamps are separated into upper and lower surfaces, one side of which is hinged to the guide rod as a hinge axis, the other side is bolted to the upper surface when dismantling the bolt It is preferable to be able to rotate by separating from the lower surface.

In addition, in the present invention, one side of the upper surface is connected to the circular ring surrounding the guide rod, it is preferable that the tightening means can be tightened the upper surface and the circular ring.

Further, in the present invention, it is preferable that bushings are installed at the inner peripheral surface of the circular ring, the lower surface adjacent to the circular ring, and the contact portion of the guide rod.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, specific details are shown in the following description, which is provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. Will be self-evident. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 is a perspective view for showing the overall configuration of one embodiment of the present invention, Figure 3 is a front view of an embodiment of the present invention, Figure 4 is a back view of an embodiment of the present invention, Figure 5 is a 4A A cross-sectional view of the line 'A'.

2 shows that the clamping device 100 includes two fixed clamps 10 and 20 having upper and lower surfaces having a curved surface formed therein so as to be able to bite the pipe therein, and the movable clamps ( 30) and 40 are made up of two pieces. In addition, cylinder rods 71 and 72 are fixed to both sides of the fixed clamp 20 adjacent to the movable clamp 30 among the fixed clamps, with the cylinder rods 71 and 72 at the center thereof. Cylinders 81 and 82 are installed to reciprocate. At this time, the cylinders 81 and 82 are fixed to both sides of the lower surfaces 31 and 41 of the movable clamps 30 and 40 so that the cylinder rods 71 and 72 are driven by hydraulic pressure. When the cylinders 81 and 82 reciprocate, the movable clamps 30 and 40 move relative to the fixed clamps 10 and 20.

In addition, the guide rods 110 and 120 are penetrated through both sides of the lower surfaces of the fixed clamps 10 and 20 and the movable clamps 30 and 40 in the longitudinal direction. At this time, the lower surfaces 11, 21 and the guide rods 110, 120 of the fixed clamps are fixed by being fixed, but the guide rods 110 through which the lower surfaces 31, 41 of the movable clamps penetrate. Since 120 is not fixed, the movable clamps 30 and 40 are moved along the guide rods 110 and 120 when the movable clamps 30 and 40 are moved.

Therefore, the load of the moving clamps applied to the cylinder rod is distributed because it moves along the guide rods 110 and 120.

In addition, the lower surface 11 of the fixed clamp 10 is fixed to the first pedestal 50, and the lower surface 21 of the fixed clamp 20 is fixed to the second pedestal 51.

Between the first pedestal 50 and the second pedestal 51 is fixed so that the gap is adjusted by the gap adjusting rod (52). Further, a vertical bent portion 53 is formed at the end of one end of the second pedestal 51 to limit the movement distance of the movement clamp 40.

In addition, the upper and lower surfaces of the clamps 10, 20, 30, and 40 are hinged with the guide rod 120 as the rotation axis, so that the upper surface with the guide rod 120 as the center It is designed to be opened and closed with respect to. At this time, the upper and lower surfaces of each of the clamps of the guide rods 120, the circular ring (13), (23), (33), (43) is installed to be rotatable while wrapping the guide rods 120, Circular rings (13), (23), (33), and (43) have bolt grooves (14), (24), (34), and (44) with threaded grooves on the top (12), (22), (32). ) And 42 are protruded to the outside, and the tightening nuts 15, 25, 35, and 45 are screwed to the protrusion to be tightened. At this time, the steel bushing 26 is installed in the inner ring (13), (23), (33), (43), and the eastern bushing (27), ( 28) is installed.

In addition, as in the front view of FIG. 3, the other side of the upper surfaces 12, 22, 32, 42, 42 and lower surfaces 11, 21, 31, and 41 that are not hinged are penetrated. Ball is formed to open and close the bolts (19), (29), (39), (49) is fastened, when you want to separate the upper and lower bolts (19), (29), (39), (49) Loosen to rotate about the hinge shaft (guide rod: 120) to open the upper surface from the lower surface.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

According to the present invention having the above configuration and object,

(1) The guide rod and the cylinder rod share the load to support the weight of the clamps and the weight of the pipes, thereby extending the life of the cylinder rod.

(2) In addition, due to the weight sharing, the weight and size of the device can be greatly reduced, resulting in miniaturization.

(3) It is possible to shorten the time of pipe fusion construction by disassembling the upper and lower surfaces by connecting one side to the hinge and shortening the time for joining.

(4) When the upper and lower surfaces are tightened by the circular ring surrounding the guide rod and the bushings inside the circular ring, the lower surface is lifted on the upper surface to prevent distortion of the cross section of the pipe. Can be reduced.

Claims (4)

Pedestal formed on the bottom; At least one fixing clamp fixed to the pedestal; At least one movable clamps which are in relative motion with respect to the fixed clamps; At least one guide rod fixed to the fixed clamps and configured to guide a movement path of the movable clamps through a portion of the movable clamps; And at least one pair of cylinders and cylinder rods fixed to said fixed clamp and said movable clamp to provide power to cause said movable clamp relative to said fixed clamp. The method of claim 1, wherein the fixing clamps and the movable clamps are separated into upper and lower surfaces, one side of which is hinged to the guide rod as a hinge axis, the other side is bolted to disassemble the bolt Pipe clamping device for pipe welding, characterized in that the upper surface can be rotated by separating from the lower surface. According to claim 2, One side of the upper surface is connected to the circular ring surrounding the guide rod, the pipe fusion pipe clamp device, characterized in that the fastening means for tightening the upper surface and the circular ring is installed. 4. The pipe clamp device for pipe welding according to claim 3, wherein bushings are installed at the inner circumferential surface of the circular ring, the lower surface adjacent to the circular ring, and a contact portion of the guide rod.