JPH0989171A - Adapter for hose joint, and flange joint part attaching structure for pipe using adapter for hose joint and hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abrasion of an inner surface rubber layer, so as to extend the life of a hose, by effectively preventing the inner surface rubber layer in the flange part of a rubber hose from projecting into the hose. SOLUTION: An adapter 13 for preventing an inner surface rubber layer 8 in a flange part 3 of a rubber hose 1 from projecting into the rubber hose 1 when the flange part 3 of the rubber hose 1 and a flange part 4 of a pipe 2 are fastened and fixed by a fastening member 6 is provided on a flange joint part G between the pipe 2 and the rubber hose 1. The adapter 13 is constituted of a pipe-shaped body 14 to be brought in contact with the inner surface side of the flange joint part G, and a flange part projecting outward from the outer periphery of the pipe-shaped body 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint adapter and a structure for mounting a flange joint portion between a pipe and a hose using the hose joint adapter, and more particularly, to abrading inner surface rubber at an end flange of the hose. The present invention relates to a hose joint adapter that is effectively prevented, and a flange joint mounting structure for a pipe and a hose using the hose joint adapter.

[0002] Conventionally, when pneumatically transporting a transported material such as cement or sandy powdery material, a long rubber hose having a flange at its end and a terminal flange such as a metal pipe at the end of this rubber hose. Is connected, and a predetermined fluid pressure (for example, 10 to 30 Kgf / cm ² ) is caused to flow in the rubber hose and the pipe to transport the package. By the way, as shown in FIG. 4, the structure of the conventional connecting portion between the rubber hose 1 and the pipe 2 is such that the contact surfaces of the rubber flange portion 3a and the metal flange portion 3b of the rubber hose 1 and the flange portion 4 of the pipe 2 are joined. Then, the fastening members 6 such as bolts and nuts are inserted through the plurality of bolt insertion holes 5 formed in the flange portions 3a, 3b, and 4 to be fastened and fixed.

[0003]

However, when the rubber flange portion 3a and the metal flange portion 3b of the rubber hose 1 and the flange portion 4 of the pipe 2 are fastened and fixed by the fastening members 6 such as bolts and nuts, the fastening force causes
As shown in the X portion of FIG. 4, the rubber flange portion 3a of the rubber hose 1 bulges into the rubber hose 1, and an annular protrusion 7 is generated to form a step.

As a result, the transported material flowing in the rubber hose 1 and the pipe 2 at a predetermined pressure collides with the projecting portion 7 to generate turbulent airflow at the step portion, and the inner rubber layer 8 is worn in a short period of time to cause hose damage. There was a problem of shortening the life. The present invention has been devised in view of such conventional problems, and when the flange portion of the rubber hose and the flange portion of the pipe are fastened and fixed by a fastening member, the inner rubber layer in the flange portion of the rubber hose is Can be effectively prevented from protruding to the inside to prevent abrasion of the inner rubber layer to extend the life of the hose, and fine adjustment such as centering at the flange joint between the pipe and the hose can be easily performed. It is an object of the present invention to provide a hose joint adapter that can be used, and a flange joint attachment structure for a pipe and a hose using the hose joint adapter.

[0005]

In order to achieve the above object, the present invention provides a flange joint between a pipe and a hose,
An adapter is provided that includes a tubular body that abuts the inner surface side of the flange joint portion between the pipe and the hose, and a flange portion that projects outward from the outer periphery of the tubular body and that is interposed between the flange joint surfaces of the pipe and the hose. That is the summary.

The end portion of the tubular body is preferably formed in a taper shape from the outer peripheral surface toward the inner wall surface. Further, the present invention includes a tubular body that covers the inner surface side of the flange joint between the pipe and the hose between the flange joints between the pipe and the hose, and a flange portion that projects outward from the outer peripheral surface of the tubular body. The gist of the present invention is to use an adapter for a hose joint, characterized in that the flange joint between the pipe and the hose is clamped and fixed by a clamp fixing means with the adapter interposed. .

The present invention is constructed as described above, and is a mounting structure for a flange joint between a pipe and a hose, wherein the inner surface of the flange joint between the pipe and the hose is attached to the flange joint between the pipe and the hose. Since a tubular body that abuts on the pipe and a flange portion that projects outward from the outer circumference of the tubular body and that is interposed between the flange joint surfaces of the pipe and the hose are provided, the flange portion of the rubber hose and the flange of the pipe are provided. The inner rubber layer at the flange portion of the rubber hose can be prevented from protruding into the hose even when it is fastened and fastened with the fastening member.As a result, the inner rubber layer is prevented from wearing and the hose life is extended. Can be done. Further, it is possible to easily perform fine adjustment such as centering at the flange joint between the pipe and the hose.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 shows an enlarged half cross-sectional view of a flange joint between a rubber hose 1 and a pipe 2 according to the present invention.
The inner rubber layer 8 is covered with the outer rubber layer 10 via the reinforcing layer 9, and the flange portion 3 of the rubber hose 1 is integrally formed with a rubber flange portion 3a and a metal flange portion 3b on the outer side thereof. .

Through holes 11 for inserting fastening members 6 such as bolts and nuts are formed in the flange portion 3 at predetermined intervals in the circumferential direction. Further, in the flange portion 4 of the pipe 2, a through hole 12 for inserting a plurality of fastening members 6 such as bolts and nuts is formed corresponding to the through hole 11 formed in the flange portion 3 of the rubber hose 1 described above. Has been done.

At the flange joint portion G between the pipe 2 and the rubber hose 1, the flange portion 3 of the rubber hose 1 and the pipe 2 are attached.
The inner rubber layer 8 of the flange portion 3 of the rubber hose 1 is fastened to the flange portion 4 of the rubber hose by the fastening member 6.
Adapter 1 to prevent rubber from protruding into the rubber hose 1
3 is interposed. As shown in FIGS. 1 to 3, the adapter 13 has a tubular body 14 that abuts on the inner surface side of the flange joint portion G between the pipe 2 and the rubber hose 1, and projects outward from the outer periphery of the tubular body 14, and A flange portion 15 having a through hole 15a for inserting a plurality of fastening members 6 interposed between the flange joint surface Ga of the pipe 2 and the rubber hose 1, and the end portion 14 of the tubular body 14
a is formed in a taper shape from the outer peripheral surface toward the inner wall surface.

The end portion 14a of the tapered tubular body 14
Is to enable the powdery transported material flowing inside the rubber hose 1 and the pipe 2 to smoothly flow without receiving flow resistance. Adapter 1 according to the present invention
3 is configured as described above, and as a method of attaching the flange joint portion G between the pipe 2 and the rubber hose 1 using this adapter 13, the adapter 13 formed in advance to a predetermined size is used. It is interposed between the flange joint portion G of and.

That is, one of the tubular bodies 14 of the adapter 13 is inserted into the pipe 2 having the flange portion 4 or one end of the rubber hose 1 having the flange portion 3, and one side surface of the flange portion 15 is inserted. The flange portion 4 of the pipe 2 or the flange joint surface Ga of the flange portion 3 of the rubber hose 1 is brought into contact with. In addition, the other end of the pipe 2 or the rubber hose 1 is fitted to the other end of the tubular body 14 of the adapter 13, and the other side surface of the flange portion 15 is attached to the flange joint surface Ga of the flange portion 4 or the flange portion 3 of the pipe 2 or rubber hose 1. Abut.

From this state, the flange portion 4 of the pipe 2, the rubber flange portion 3a and the metal flange portion 3b of the rubber hose 1, and the flange portion 15 of the adapter 13 interposed therebetween are connected to the plurality of through holes 11. , 12 and 15a
In a state where and are aligned, the fastening members 6 such as bolts and nuts are respectively inserted and tightened and fixed. Even if the rubber flange portion 3a of the rubber hose 1 is tightened and fixed by the fastening member 6 as described above, the inner rubber layer 8 of the rubber hose 1 is fixed.
Since the inner surface of the flange portion is pressed by the tubular body 14 of the adapter 13 without forming a step and covering the inner surface side of the flange joint portion G, it does not project into the rubber hose 1.

[0014]

As described above, according to the present invention, a tubular body abutting on the inner surface side of the flange joint between the pipe and the hose between the flange joints between the pipe and the hose as described above, and an outward direction from the outer periphery of the tubular body. Since an adapter consisting of a flange portion that protrudes from the flange and is interposed between the flange joint surfaces of the pipe and the hose is provided, when the flange portion of the rubber hose and the flange portion of the pipe are tightened and fixed by the fastening member, It is possible to effectively prevent the inner surface rubber layer from protruding into the hose, prevent the inner surface rubber layer from being worn, and extend the life of the hose.In addition, fine alignment such as centering at the flange joint part between the pipe and the hose. There is an effect that adjustment can be easily performed.

[Brief description of drawings]

FIG. 1 is an enlarged half sectional view of a flange joint portion between a rubber hose and a pipe according to the present invention.

FIG. 2 is an overall perspective view of an adapter.

FIG. 3 is a partially enlarged sectional view of an adapter.

FIG. 4 is an enlarged half sectional view of a conventional flange joint between a rubber hose and a pipe.

[Explanation of symbols]

 1 Rubber Hose 2 Pipe 3 Flange Part 3a Rubber Flange Part 3b Metal Flange Part 4 Flange Part 6 Fastening Member 8 Inner Rubber Layer 9 Reinforcement Layer 10 Outer Rubber Layer 11, 12 Through Hole 13 Adapter 14 Tubular Body 14a Terminal 15 Flange 15a Through Hole G Flange joint part Ga Flange joint surface

Claims (3)

[Claims] 1. A tubular body that abuts an inner surface side of a flange joint between the pipe and the hose between the flange joints between the pipe and the hose, and projects outward from an outer periphery of the tubular body,
Also, an adapter for a hose joint, which is provided with an adapter including a flange portion interposed between the flange joint surfaces of the pipe and the hose. 2. The hose joint adapter according to claim 1, wherein the end portion of the tubular body is formed in a tapered shape from the outer peripheral surface toward the inner wall surface. 3. A mounting structure of a flange joint portion between a pipe and a hose, wherein a pipe provided with a flange and a flange of a rubber hose are brought into contact with each other and clamped and fixed by a clamp fixing means. Between the parts, a tubular body covering the inner surface side of the flange joint part between the pipe and the hose, and an adapter consisting of a flange part projecting outwardly on the outer peripheral surface of the tubular body is interposed, and the pipe and the hose A structure for mounting a flange joint between a pipe and a hose using a hose joint adapter, characterized in that the flange joint is clamped and fixed by a clamp fixing means with an adapter interposed.