JPH10292886A - Ball joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the inclination of a piping by a ball joint. SOLUTION: A holding device 35 is provided to a ball joint 2. The holding device 35 is furnished with an installing board 36 fixed to a lid 23; a bolt 37 provided to the installing board 36; a supporting member 38B to support the lower surface of a tube body 22; and a reverse U-shape bolt 41 to fix the tube body 22 to the supporting member 38B. The bolt 37 supports a supporting member 38A freely regulatable in its height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball joint connected in the middle of a pipe, and more particularly to a ball joint for preventing a pipe from being inclined due to an earthquake, the weight of the pipe itself, or the like.

[0002]

2. Description of the Related Art A ball joint of this kind, which is connected in the middle of various pipelines and allows relative movement (tilt, rotation, twist, etc.) of the pipeline, generally has a spherical or conical seating surface. A main body connected to one of the pipes, a pipe body having a ball fitted to the seat surface and connected to the other pipe, and a lid holding the ball and preventing the ball from coming off the main body; And so on. As a pipeline using such a ball joint,
For example, pipelines that expand and contract due to changes in the temperature of the outside air and the temperature of the transport fluid, pipelines that bend due to subsidence by equipment and tanks, and pipes that may move due to wind and flood damage or earthquake Examples include a line, a pipeline on which torsion or rotational force acts.

FIG. 4 is a schematic view showing a conventional example of a pipeline using such a ball joint, and FIG. 5 is a perspective view of a support frame. In these figures, 1a, 1b, 1c,
1d is a pipe constituting a pipeline, 2 is a pipe 1a to 1
d, a ball joint for connecting d, a seismic isolation side fixing point for fixing the pipe 1a to a building 4 such as a building or a structure, a ground (floor) side fixing point for fixing the pipe 1d to the ground 6, 7
Is a support frame for supporting an intermediate portion of the pipes 1b and 1c, 8 is a heat insulating material, and 9 is a metal plate covering the heat insulating material 8. The pipes 1b, 1c provided between the seismic isolation side and the ground side pipes 1a, 1d are cantilevered by connecting one end to the pipes 1a, 1d via the ball joint 2, respectively. Therefore, the other ends of the pipes 1b and 1c may be bent or inclined by the weight of the ball joint 2 or the pipe itself. In order to prevent this, an intermediate portion of the pipes 1b and 1c is supported by a support frame 7. The support frame 7 is generally made of a pipe or the like, and has a main body 7A for supporting the pipe from below, and a main body 7A.
A comprises a pair of legs 7B provided at both ends, and is installed on the floor.

[0004]

However, in the above-mentioned conventional pipeline, since the support frame 7 is installed on the floor, work for installing the support frame 7 is required. There was a problem that costs increased. In a narrow place, it is difficult to secure an installation space for the support frame 7, and there is a problem that installation is restricted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a ball joint in which a cantilevered pipe is prevented from being inclined. .

[0006]

In order to achieve the above object, a ball joint according to the present invention comprises a tube having a ball, a main body having a seating surface on which the ball is slidably fitted, and a main body having the same. A ball joint that connects the two pipes with a lid that is attached to and holds the ball,
A holding device for holding the pipe body is provided on the main body side. Therefore, there is no need to support the middle of the pipe with the support frame. Further, the present invention is characterized in that the holding device is attached to the lid. Therefore,
The lid can also be used as a mounting member for the holding device. Further, the present invention provides a mounting base having a holding device fixed to a lid, a height adjusting means provided on the mounting base, and a support member which supports a tubular body and whose height is adjusted by the height adjusting means. It is characterized by having. Therefore, the height, inclination and the like of the pipe can be adjusted by the height adjusting means. Further, the present invention is characterized in that the mounting base is provided integrally with the lid. Therefore, the number of parts can be reduced. Further, the present invention is characterized in that the mounting base is fixedly fastened to the main body together with the lid. Therefore, the lid and the mounting base can be simultaneously fixed to the main body. Further, the present invention is characterized in that the pipe is fixed to the upper surface of the support member by an inverted U-shaped fixing member. Therefore, the horizontal movement of the pipe can be reliably prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a schematic configuration diagram of a pipeline having a ball joint according to the present invention, FIG. 2 is a cross-sectional view showing one embodiment of the ball joint, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. In the drawings, components and the like shown in the section of the prior art are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. In these figures, the ball joint 2 itself is the same as the conventional one, but differs in that it has a holding device 35 described later. Hereinafter, the configurations and the like of the ball joint 2 and the holding device 35 will be described in detail.

The ball joint 2 is connected to one of the pipes 1.
a, a tube body 22 integrally provided with a ball 21 and flange-connected to the other pipe 1b, a lid 23 for holding the ball 21, and the like.

The main body 20 is composed of SCS13, SCPH2
The distal end is formed in a cylindrical body whose diameter is enlarged, and flanges 24a and 24b are integrally provided on the outer peripheral surfaces of both ends, and the base side flange 24a is connected to the one pipe 1
The lid 23 is fastened to the flange a by a plurality of bolts (not shown), and the lid 23 is fastened to the flange 24 b on the tip end side by a plurality of bolts 25. A spherical seat 2 which forms a part of a spherical surface is provided on the inner peripheral surface on the distal end side of the main body 20.
The ball 21 is rotatably fitted to the spherical seat 26 via a sealing member 27 made of an O-ring or the like.

The ball 21 is made of SCS13, STKM
The tube 22 is formed of a material such as 13A, the surface of which is plated, and attached to the outer peripheral surface of the distal end portion of the tube 22 by screwing. Therefore, a female screw portion 29 is formed on the inner peripheral surface of the through hole 28 formed at the center of the ball 21, and a male screw 30 formed on the outer peripheral surface of the distal end portion of the tube 22 in the female screw portion 29 is provided with an O-ring or the like. It is screwed via a seal member 31.

The tube 22 is made of SCS13, STPG37.
0 and the like, and has a flange 32 integrally formed on the outer peripheral surface on the base side.
2 is fastened to the flange of the other pipe 1b by a plurality of bolts (not shown).

In this embodiment, the ball 21 and the tube 22 are manufactured as separate members, and the ball 21 is attached to the tube 22 by screwing. However, the present invention is not limited to this. May be joined to the tube 22 by welding, or the ball 21 and the tube 22 may be integrally formed.

The holding device 35 is connected to the lid 24 by the bolt 25 and the flange 24 b of the main body 20.
And a mounting base 36 which is fixedly fastened to the mounting base 36. The mounting base 36 is a cylindrical mounting part 3 having a female screw formed on the inner peripheral surface.
6A, and a support member 38 is attached to the mounting portion 36A.
A bolt 37 serving as a height adjusting means for supporting A so that the height can be adjusted is screwed in, and loosening is prevented by a nut 39. The mounting base 36 is not limited to being manufactured separately from the lid 23, and may be formed integrally.

The support member 38A is formed in a cylindrical shape and has another support member 3 for supporting the lower surface of the tube 22 on the upper surface.
8B is provided and supported by the bolt 37. Therefore, a recess 40 into which the tip of the bolt 37 is inserted is formed at the center of the lower surface of the support member 38A. A fixing member 41 for fixing the support member 38B to the tube 22 is attached to the upper surface of another support member 38B. The fixing member 41 is formed of an inverted U-shaped bolt, and both ends of the fixing member 41 are supported by nuts 42.
Is fixed.

In the ball joint 2 having such a structure, since the pipe 22 is supported by the holding device 35, there is no possibility that the pipe 1b is inclined by its own weight or the like. Since the conventional support frame 7 and its installation work are not required, the cost of piping work can be reduced. In addition, since the holding device 35 has a simple structure and is arranged in the space below the tube 22,
It is not necessary to secure a large installation space as in the above, and plumbing can be performed even in a narrow place.

In the above-described embodiment,
Although the example in which the spherical seat 26 is formed as the seat surface of the main body 20 has been described, the present invention is not limited to this, and a conical seat may be used.

[0017]

As described above, the ball joint according to the present invention is provided with the holding device, and the tube is supported by the holding device. Therefore, the inclination of the pipe can be reliably prevented. It eliminates the need for a support frame or the like to be installed on the floor. Therefore, the plumbing work is easy and the construction cost can be reduced, and it is not necessary to secure a special installation space for the holding device, and the plumbing work can be performed even in a narrow place. Further, in the present invention, since the mounting base is provided integrally with the lid, the number of parts can be reduced. Further, in the present invention, since the mounting base is fixedly fastened to the main body together with the lid, the lid and the mounting base can be simultaneously fixed to the main body, and the mounting operation is easy. Further, in the present invention, since the pipe is fixed to the upper surface of the support member by the inverted U-shaped fixing member, the pipe can be reliably fixed, and the vertical and horizontal movements can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a pipeline including a ball joint according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a ball joint.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a schematic configuration diagram showing a conventional example of a pipeline using a ball joint.

FIG. 5 is a perspective view of a support frame.

[Explanation of symbols]

1a to 1d: Piping, 2: Ball joint, 3: Fixed point on seismic isolation side, 4: Building, 5: Fixed point on ground side, 6: Ground, 7
... Support frame, 20 ... Main body, 21 ... Ball, 22 ... Tube, 2
DESCRIPTION OF SYMBOLS 3 ... Lid, 26 ... Spherical seat, 35 ... Holding device, 36 ... Mounting stand, 37 ... Bolt, 38A, 38B ... Bearing member, 41 ...
Fixing member.

Claims (6)

[Claims] A ball joint comprising a tube having a ball, a body having a seating surface on which the ball is slidably fitted, and a lid attached to the body for holding the ball, and connecting two pipes. The ball joint according to claim 1, wherein a holding device for holding the pipe body is provided on the main body side. 2. The ball joint according to claim 1, wherein the holding device is attached to the lid. 3. The ball joint according to claim 2, wherein the holding device is fixed to the lid, a height adjusting means provided on the mounting base, and a tube is supported by the height adjusting means. A ball joint comprising a height-adjustable bearing member. 4. The ball joint according to claim 3, wherein the mounting base is provided integrally with the lid. 5. The ball joint according to claim 3, wherein the mounting base is fixedly fastened to the body together with the lid. 6. The ball joint according to claim 3, wherein the pipe is fixed to the upper surface of the support member by an inverted U-shaped fixing member.