JP3017488B1 - Fitting tube - Google Patents

Abstract

In a housing type pipe joint, it is extremely difficult to connect a butt portion between pipes such as branch pipes. SOLUTION: In a housing type pipe joint, a fastening ring is attached only inside one of inner circumferential edges of both ends in the cylindrical axial direction, and a rubber sleeve is attached without attaching a fastening ring inside the other. And a fitting pipe having a ring-shaped protrusion formed on the outer periphery of the end fitted into the notch, and the ring-shaped protrusion of the fitting pipe is cut into a notch of a pipe joint mechanism. And the fitting tube is integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting pipe in which a pipe joint mechanism for connecting pipes is integrated.

2. Description of the Related Art There is a housing type in which a discontinuous end is tightened while a constant gap is maintained in a pipe-to-pipe connected to one of conventional pipe fittings.

A housing of this kind of pipe joint has a bolt fastening mechanism at a cylindrical portion where one end in the circumferential direction is discontinuous, and has an inner circumferential edge at both ends in the cylindrical axial direction. It has a structure in which the inner diameter is reduced by tightening bolts, and has a steel sealing ring with a sealing rubber sleeve for the tube to be connected to the inner surface and a claw portion that bites into the tube, and by tightening the housing The rubber sleeve comes into close contact with the entire circumference of the pipe end, and the claw bites into the outer circumference of the pipe so as to oppose the pull-out force.

[0004] Pipe fittings of this kind are described, for example, in German Patent No. 2
No. 428107, Japanese Patent Publication No. 55-25316,
JP-B-57-50994, JP-B-2-53669
As described in the above publication, there is a practically satisfactory connection between opposed tubes.

[0005] As a method of connecting the branch pipes, there are a method of piercing the middle of the pipe and connecting the branch pipe there, and a method of simultaneously connecting the pipe to the butt portion of the pipe-to-pipe. There is a casting type as a pipe joint to be used.

[0006] However, in the case of the housing type pipe joint, a pipe joint for branch pipes, which is more reliable, is rarely seen. This seems to be due to the fact that the housing is manufactured by press-molding stainless steel or a steel plate, so that it is difficult to integrally manufacture the housing, and that simply connecting the branch portions lacks reliability.

[0007]

SUMMARY OF THE INVENTION The present invention relates to the above housing type pipe joint, which can be applied not only to a straight pipe but also to all branch pipes such as a 45 degree elbow, a 90 degree elbow, and a different diameter cheese. An object of the present invention is to provide a fitting tube in which a pipe joint mechanism is integrated.

[0008]

The object of the present invention is to form a ring-shaped protrusion on the outer periphery of an end, and the ring-shaped protrusion is bolted to a discontinuous portion of a cylindrical housing whose one end in the cylindrical direction is discontinuous. It has a fastening mechanism, is mounted on the inner surface of the housing is mounted a rubber sleeve for close contact with a cutout formed inside one edge in the cylindrical axial direction of the housing, and a fastening ring is mounted inside the other edge. The problem is solved by providing a fitting tube that is fitted into the cutout portion of the pipe joint mechanism to be integrated.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 has a fastening mechanism including a fastening plate 11, a fastening bolt 12, and the like at a cylindrical discontinuous portion where one end in the circumferential direction is discontinuous, and has edges 13 at both ends in the axial direction. 1 shows a pipe joint mechanism 10 equipped with a steel sealing ring 3 having a rubber sleeve 2 for sealing a pipe to be connected to the inner surface of a housing 1 and a pawl 31. As will be described later, the tightening ring 3 is attached to only one inside of the inner peripheral edge 13 at both ends in the axial direction of the cylindrical shape, and is not attached to the other inside. As will be described later, the rubber sleeve 2 has a cutout portion 21 inside the other edge portion 13 for fitting the annular protrusion 61 of the fitting tube 6 having the annular protrusion 61 formed on the outer surface at the end. Is formed.

Here, the fitting tube is a tube having a shape that maintains a straight tube, a tube that produces an angle of 45 degrees, 90 degrees, or the like, a tube that changes a branch or a pipe diameter, such as a socket, 45 degrees. Elbow, 90-degree elbow, cheese of different diameter, and the like.

FIGS. 2 to 4 each show a pipe joint mechanism 10.
2 shows a structure in which the fitting tube 6 is integrated. In these examples, the fitting tube 6 has a ring-shaped protrusion 61 formed on the outer periphery of the end by bulging. here,
The fitting tube 6 uses a socket for connecting a straight tube in FIG. 2, a 90-degree elbow for connecting the tube at a right angle in FIG. 3, and a different diameter cheese for connecting a branch tube in FIG. ing.

The details of the fitting tube in which the pipe joint mechanism thus constructed is integrated will be described with reference to FIGS.

The pipe joint mechanism 10 has a rubber sleeve 2 and a tightening pipe 3 mounted thereon. The fastening tube 3 is mounted only inside one of the edges 13 at both ends in the cylindrical direction of the housing 1, and the rubber sleeve 2 is cut inside the other edge 13 at the both ends in the cylindrical shape of the housing 1. A notch 21 is formed. The notch 21 may be formed by providing a space between the edge 13 and the rubber sleeve 2 as in this example, and a circular recess may be formed in the rubber sleeve 2 along the peripheral surface. May be formed.

The fitting tube 6 is formed with a ring-shaped protrusion 61 on the outer periphery at both ends by bulging. Needless to say, the annular projection 61 does not have to be formed by bulging.

The rubber sleeve 21 may be a normal rubber packing, but the sealing effect due to the elasticity of the rubber decreases in proportion to the increase in pressure. Therefore, in the present invention, a cavity 22 is provided at the center to improve the sealing performance by pressure.

The pipe joint mechanism 10 and the fitting pipe 6 thus formed are integrated by fitting the annular projection 61 of the fitting pipe 6 into the notch 21 formed in the pipe joint mechanism 10. In order to fit the annular projection 61 of the fitting pipe 6 into the notch 21 of the fitting mechanism 10, the fastening mechanism including the fastening plate 11, the fastening bolt 12, and the like of the fitting mechanism 10 shown in FIG. Do. In the drawing, the fitting tube 6 is shown by a socket, but the structure other than the socket has the same structure of integrating the pipe joint mechanism 10 and the fitting tube 6.

In the fitting pipe in which the pipe joint mechanism thus formed is integrated, the pipes are connected as follows.

First, the tightening of the housing 1 of the pipe joint mechanism 10 is released, and the pipe 5 to be connected to the pipe joint mechanism 10 is inserted from the side of the edge 13 where the fitting pipe 6 is not connected, as shown in FIG. I do. After the tube 5 has been inserted, FIG.
The housing 1 of the pipe joint mechanism 10 is tightened by the tightening mechanism as shown in FIG. When the housing 1 is tightened, the rubber sleeve 2 mounted on the housing 1 comes into close contact with the outer peripheral surfaces of the tube 5 and the fitting tube 6, and the claws 31 of the tightening ring 3 bite into the outer peripheral surface of the tube 5. Although the drawing shows only one of the connected pipes, the pipes connected to each other may be connected in the same procedure.

[0020]

The present invention has been made as described above.
It has the following effects.

Since the fitting is a fitting having a structure in which a fitting pipe is connected to a fitting mechanism, the fitting is not limited to a straight pipe, and all branch pipes such as a 45-degree elbow, a 90-degree elbow, and a different-diameter cheese are used. , Branch pipes and the like.

The connection side with the pipe to be connected has a structure in which a fastening ring with a claw is attached as in the past, but the connection between the pipe joint mechanism and the fitting pipe is made in the cutout portion of the rubber sleeve of the pipe joint mechanism. Since the annular projection of the fitting tube is fitted into the fitting tube, the fitting tube can be prevented from being removed from the fitting mechanism.

Since the fitting pipe is connected to one end of the pipe joint mechanism in the axial direction of the cylindrical shape, the pipes to be connected can be positioned simply by being inserted. It is no longer necessary to mark the tube to confirm the insertion length as when inserting a tube to be inserted. Further, the pipe is not twisted and attached at the time of work, and construction errors are greatly reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of a pipe joint mechanism according to the present invention.

FIG. 2 is a front view showing an example in which the pipe joint mechanism and the fitting pipe according to the present invention are integrated.

FIG. 3 is a front view showing another example in which the pipe joint mechanism and the fitting pipe according to the present invention are integrated.

FIG. 4 is a front view showing another example in which the pipe joint mechanism and the fitting pipe according to the present invention are integrated.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is an enlarged view of a part shown in FIG. 5B.

FIG. 7 is an explanatory diagram showing a connection procedure of a pipe to be connected.

FIG. 8 is an explanatory diagram showing a connection procedure of a pipe to be connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 10 Fitting mechanism 11 Clamping plate 12 Bolt 13 Edge 2 Rubber sleeve 21 Notch 22 Cavity 3 Clamping ring 31 Claw 5 Tube 6 Fitting tube 61 Ring projection

Claims (1)

(57) [Claims] An annular projection is formed on the outer periphery of an end, and the annular projection has a bolt fastening mechanism at a discontinuous portion of a cylindrical housing having one end discontinuous in a cylindrical direction. The notch of the pipe joint mechanism having a structure in which a sealing rubber sleeve having a notch formed inside one edge of the cylindrical shape in the axial direction of the housing is mounted, and a tightening ring is mounted inside the other edge. A fitting tube characterized by being fitted into and integrally formed with the fitting tube.