JP2005282184A - Joint for metallic cylindrical material such as steel pipe for pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint having a structure capable of excellently putting a steel pipe for a pile and a joint in an aligning state without using a special jig, capable of holding a required route interval, and capable of eliminating temporary welding without causing a defect in a welding deep part. <P>SOLUTION: This joint has an inclined face part 4 for a groove for forming an annular groove 3 for welding, a fitting projection part 5 for backing, and padding parts 6, etc. of at least three places at an interval in the peripheral direction. The respective padding parts 6, etc. have a tapered inclined face part 7 and an abutting part 8. A predetermined route interval R is formed in a state of allowing an end surface such as the steel pipe for the pile to abut on the abutting part 8 of the respective padding parts 6, etc. A temporary joining state for welding is formed by fitting of an end part such as the steel pipe for the pile to the tapered inclined face parts 7, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a joint for a metal cylinder such as a steel pipe for piles.

  For example, as shown in FIG. 8, when a joint 52 made of cast steel is attached to the end of the pile steel pipe 51 by welding, the end face of the steel pipe 51 is connected to the joint 52 as shown in FIGS. It has been conventionally performed to provide an annular groove slope portion 54 that forms an annular groove 53 for welding with a portion.

  However, in the structure as described above, when the steel pipe 51 and the joint 52 are brought into a butted state, the axis A of the steel pipe 51 and the axis B of the joint 52 are easily displaced in parallel as shown in FIG. As shown in FIG. 8 (d), the axis A of the steel pipe 51 and the axis B of the joint 52 are liable to be shifted in angle, and therefore, a special jig is used to prevent such shift. There was a problem that had to be.

  In addition, there is a problem that a special jig is required to maintain the root interval, a problem that a temporary welding must be performed before the main welding, and there is a possibility of causing a defect in the temporary welding part. There is also a problem in that there is a risk of causing a defect in the welded deep portion because it is welded without any problems.

  In view of the conventional problems as described above, the present invention can successfully align a metal cylinder such as a steel pipe and a joint without using a special jig and a necessary route. Providing joints for metal cylinders such as steel pipes for piles, which can maintain the gap, eliminate the possibility of causing defects in the weld depth, and eliminate temporary welding The task is to do.

The above problem is a joint that is attached by welding to the end of a metal cylinder,
An annular groove slope portion that forms an annular groove for welding with the end surface portion of the tubular material, and a fitting convex portion for backing that fits into the end portion of the tubular material in an internally fitted state. Provided,
In the boundary portion between the groove slope portion and the fitting convex portion, a built-up portion is provided in at least three places spaced in the circumferential direction,
Each build-up part has a tapered slope that regulates the parallel displacement between the axis of the cylinder and the axis of the joint, and the end face of the cylinder makes contact with the angle between the axis of the cylinder and the axis of the joint. And a predetermined route interval is formed between the end portions of the cylinder members in a state in which the end surfaces of the cylinder members are in contact with the contact portions of the build-up portions. It is solved by a joint for metal cylinders such as steel pipes for piles, which is characterized by being made.

  In this joint, at the boundary portion between the groove slope portion and the fitting convex portion, there are at least three places where there are circumferentially spaced portions, and each of the build-up portions has a tapered slope portion and a contact portion. Since the end of the cylinder is brought into contact with the abutting part through the tapered slope of each build-up part, the parallel deviation and angle between the axis of the cylinder and the axis of the joint are provided. Therefore, the cylindrical member and the joint can be well aligned without using a special jig.

  In addition, since a predetermined route interval is formed between the end of the tubular member and the end of the tubular member in a state where the end surface of the tubular member is in contact with the contact portion of each build-up portion, a special jig is used. Even if it is not used, a necessary route interval can be maintained. Moreover, since the fitting convex part for the back | bag fitted to the end part of a cylinder material is fitted in an internal fitting state, the possibility that a defect may arise in a welding deep part can be eliminated. Of course, since the built-up portions are provided at intervals in the circumferential direction, they do not hinder welding or welding quality.

  In the above-mentioned joint, when a temporarily joined state for welding is formed by fitting the end of the tubular material to the tapered slope portion provided in each build-up portion, For this reason, it is possible to eliminate temporary welding for the purpose, and it is possible to eliminate the occurrence of defects accompanying temporary welding.

  Further, in the above-described joint, when the fitting convex portion is provided in multiple stages and each of the built-up portions is provided in multiple stages corresponding to the tapered inclined surface portion and the contact portion, a plurality of different wall thickness sizes and the like are provided. It can be used for various types of cylinders and is not only economical, but can be easily realized with a reasonable structure.

  Furthermore, when the above-mentioned joint is made of a cast product and each build-up part is integrally formed by casting, it has fine structural parts such as a tapered slope part and a contact part for centering and maintaining a root interval. The overlaid portion can be provided in the joint with high accuracy and easy molding.

  Since the present invention is as described above, a metal tube such as a steel pipe and a joint can be well aligned without using a special jig, and a necessary route interval can also be obtained. In addition, it is possible to eliminate the possibility of causing a defect in the weld deep portion, and it is possible to eliminate temporary welding.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  A joint 1 according to the first embodiment shown in FIGS. 1 to 3 is a joint that is welded to the end of a steel pipe 2 for piles. It is made up of.

  The joint 1 has an annular groove for forming an annular groove 3 for welding between the base end portion thereof, that is, the end portion on the side where the pile steel pipe 2 is attached, with the end face portion of the pile steel pipe 2. A slope portion 4 for use is provided, and a fitting convex portion 5 for backing that is fitted in an end fitting state to the end portion of the pile steel pipe 2 is integrally provided.

  And in the boundary part of the slope part 4 for groove | channels and the fitting convex part 5, the built-up parts 6 ... are provided in four places spaced apart in the circumferential direction at dotted | punctate form. Each build-up portion 6 is integrally formed by casting at the time of casting the joint 1, and a tapered slope portion 7 that regulates a parallel shift between the axis A of the pile steel pipe 2 and the axis B of the joint 1. And an abutting portion 8 for restricting the angular deviation between the axis A of the pile steel pipe 2 and the axis B of the joint 1 by bringing the end face of the pile steel pipe 2 into contact with each other, and the pile steel pipe 2 A predetermined route interval R is formed between the end faces of the pile steel pipes 2 in a state where the end faces thereof are brought into contact with the contact portions 8 of the respective built-up portions 6.

  Moreover, the taper slope part 7 of each build-up part 6 ... can be in the temporary joining state for the joint 1 and the steel pipe 2 for piles by welding by fitting the edge part of the steel pipe 2 for piles. As such, the arrangement relationship and inclination angle thereof are determined.

  What is necessary is just to perform joining of said joint 1 and the steel pipe 2 for piles as follows. That is, the joint 1 and the steel pipe 2 for piles are turned sideways, or one of them is vertically oriented so that one of them is up and the other is down, and the fitting convex portion 5 of the joint 1 is connected to the end of the steel pipe 2 for piles. The end surface of the pile steel pipe 2 is brought into contact with the contact portion 8 of each build-up portion 6 as shown in FIG.

  As a result, the axis A of the pile steel pipe 2 and the axis B of the joint 1 are aligned with each other without using a special jig, and are in a state of alignment without parallel deviation or angular deviation. At the same time, the tapered slope portion 7 of each build-up portion 6 is in a state where it is strongly in contact with the end portion of the pile steel pipe 2, and the pile steel pipe 2 and the joint 1 are temporarily attached for welding without being temporarily welded. Joined state. Further, as shown in FIG. 3 (c), a predetermined route interval R is formed between the pile steel pipe 2 and the joint 1, and the back portion of the welding annular groove 3 between the pile steel pipe 2 and the joint 1. The fitting convex portion 5 exists in this, and the fitting convex portion 5 is in a state where it can work as a backing for welding. If welding annular groove 3 is welded over the entire circumference in this state, pile steel pipe 2 and joint 1 are joined and integrated.

  Thus, according to the joint 1 described above, the pile steel pipe 2 and the joint 1 can be well aligned without using a special jig, and the necessary route interval R is also maintained. In addition, it is possible to eliminate the possibility of causing defects in the weld deep portion by the backing by the fitting convex portion 5, and it is possible to eliminate defects associated with temporary welding.

  The joint 1 of the second embodiment shown in FIGS. 4 to 7 is provided with two fitting projections 5 in multiple stages, as shown in FIG. Two sets of tapered slope portions 7 and contact portions 8 are provided in the portion 6 in multiple stages, and each of the pile steel pipes of the thick, pile steel pipe 2 and thin pile steel pipe 2 is aligned. Then, holding of the root interval R, backing, and temporary joining are performed so that welding can be easily performed with good quality.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the joint 1 for a steel pipe for piles is shown. However, the joint of the present invention is not limited to a pile, for example, various modified pipes other than a circle such as a pillar, a truss, a pole, or a square pipe, It goes without saying that it can be widely used as a joint for various metal pipes that can be welded other than steel.

The joint of 1st Embodiment is shown, A figure (I) is a base end top view, A figure (B) is a front view. It is an enlarged side view of a built-up part. Figure (a) is a front view showing the joint and the steel pipe for piles in a separated state, Figure (b) is a front view of the built-up part with the joint and the steel pipe for piles fitted, and Figure (c) is the joint and the pile. It is a partial front view other than the build-up part of the state which fitted the steel pipe for operation. The joint of 2nd Embodiment is shown, A figure (I) is a base end top view, A figure (B) is a front view. It is an enlarged side view of a built-up part. Fig. (A) is a front view showing the joint and pile steel pipe in a separated state. Figure (b) is a build-up with the joint and pile steel pipe engaged. The front view in a part and a figure (C) are partial front views other than the build-up part of the state which fitted the joint and the steel pipe for piles. Figure (A) is a front view showing the joint and the pile steel pipe in a separated state, and (B) is the meat with the joint and the pile steel pipe fitted together. A front view and a figure (c) in a filling part are partial front views other than a build-up part in the state where a joint and a steel pipe for piles were fitted. Drawing (a)-figure (d) are front views which show the relation between the conventional joint and the steel pipe for piles, respectively.

Explanation of symbols

1 ... Fitting 2 ... Steel pipe for pile (metal cylinder)
DESCRIPTION OF SYMBOLS 3 ... Annular groove 4 ... Slope part for groove | channel 5 ... Fitting convex part 6 ... Overlaying part 7 ... Tapered slope part 8 ... Contact part A ... Axis line B ... Axis line R ... Route space | interval

Claims (4)

A joint that is welded to the end of a metal cylinder,
An annular groove slope portion that forms an annular groove for welding with the end surface portion of the tubular material, and a fitting convex portion for backing that fits into the end portion of the tubular material in an internally fitted state. Provided,
In the boundary portion between the groove slope portion and the fitting convex portion, a built-up portion is provided in at least three places spaced in the circumferential direction,
Each build-up part has a tapered slope that regulates the parallel displacement between the axis of the cylinder and the axis of the joint, and the end face of the cylinder makes contact with the angle between the axis of the cylinder and the axis of the joint. And a predetermined route interval is formed between the end portions of the cylinder members in a state in which the end surfaces of the cylinder members are in contact with the contact portions of the build-up portions. A joint for metal cylinders such as steel pipes for piles, characterized by being made.   The steel pipe for piles according to claim 1, wherein a temporary joining state for welding is formed by fitting the end portion of the tubular member to the tapered slope portion provided in each of the build-up portions. Fittings for metal tubes such as   The fitting convex portion is provided in multiple stages, and each build-up portion is provided in multiple stages in which a tapered slope portion and a contact portion correspond to each other. Joint for tubular materials.   The joint for metal cylinder materials, such as a steel pipe for piles, as described in any one of Claims 1 thru | or 3 which consists of castings, and each said build-up part is integrally formed by casting.

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