JPH0353104Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a pipe connecting device.

[Conventional technology]

Conventionally, when connecting the inlet of an instantaneous water heater and a water pipe via a supplementary pipe, for example, a cap nut 2 fitted at the end of one pipe 1 is connected to the inlet or the water pipe, as shown in FIG. It is screwed into branch port 3.

In order to prevent water leakage in this case, a retaining flange 4 for the cap nut 2 that extends outward from the edge of the supplementary pipe 1 and a protruding tube 5 that extends from this flange 4 are provided, and the outer side of the protruding tube 5 is provided. After fitting the annular packing 6 into the inlet and the protruding tube 5 inside the inlet or branching port 3, the packing 6 is sandwiched between the flange 4 and the end face of the inlet or branching port 3 by screwing in the cap nut 2. At the same time, the protruding tube 5 prevents the packing 6 from escaping inward during clamping.

[The problem that the idea attempts to solve]

Since the double-walled flange that overlaps the end of the supplementary pipe and the protruding tube are connected together,
There was a problem in that the processing was time-consuming and caused a significant increase in costs.

[Means to solve the problem]

In order to solve the above problems, this invention includes a cap nut fitted outside the end of one pipe so as to be screwed into the end of the other pipe, and a cap nut that extends outward from the edge of the one pipe. a flange for locking the cap nut to prevent it from coming out; a cylindrical body with one end fitted inside the end of the one pipe so that the other end fits inside the end of the other pipe; It consists of a stopper provided at the end to position the fitted cylinder, and a packing fitted on the outside of the cylinder.

[Effect]

A cylindrical body is fitted inside the end of one pipe, and one end edge of the cylindrical body is brought into contact with a stopper.

Next, the other end of the cylinder protruding from one pipe is fitted into the end of the other pipe, and a cap nut is screwed into the other pipe to connect the opposite ends of both pipes.

〔Example〕

As shown in the figure, a cap nut 12 is fitted on the outside of the end of one pipe 11.

The above-mentioned cap nut 12 is attached to a flange 13 extending outwardly from the end edge of one pipe 11 so as to prevent it from coming off.

14 is the other pipe; this other pipe 14
A threaded portion 15 into which a cap nut 12 is screwed is provided on the outer periphery of the end portion.

Reference numeral 16 denotes a cylinder whose one end is fitted inside the other end of one pipe 11, and this cylinder 16 is stopped by abutting one end edge with a stopper 17 provided on the inner periphery of one pipe 11. , the other end of the cylindrical body 16 protrudes from one end of the pipe 11.

The above-mentioned stopper 17 is connected to one of the illustrated pipes 1.
1. Instead of the annular protrusions provided on the inner periphery, protrusions may be arranged in a scattered manner.

Reference numeral 18 denotes a packing fitted to the outside of the other end of the cylindrical body 16.

Next, the connection method will be explained.

After fitting the other end of the cylindrical body 16 into the end of the other pipe 14, the cap nut 12 on the one pipe 11 side is screwed into the threaded portion 15 of the other pipe 14, and the flange 13 and the other pipe 14 are screwed together. The packing 18 is clamped by the end faces of the cylinder body 16 to prevent leakage, and the cylinder body 16 prevents the packing from escaping inward due to the clamping pressure.

In the case shown in the figure, cylinders 16 with the same diameter are used, but when both pipes have different diameters, cylinders with different diameters are used.

Further, the other pipe 14 may be an inlet of an instantaneous water heater, a branch of a water supply, or the like.

〔effect〕

As described above, according to the connecting device according to this invention, one end side of the cylindrical body is fitted inside the end of one pipe, and the cylindrical body prevents deformation of the packing from the end of the one pipe. Since the other end is protruded, there is no need to bend the cylindrical body that protrudes from the flange of one pipe.

Therefore, it is possible to significantly reduce costs.

Furthermore, when one end of the cylinder is fitted into one pipe, one end edge of the cylinder is brought into contact with the stopper on the inner periphery of the one pipe, and the other end of the cylinder is stopped from the end of the one pipe. The end side can be in a protruding state.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the connecting device according to this invention, Fig. 2 is an exploded perspective view showing the main parts of the same, and Fig. 3 is an exploded perspective view showing the main parts of the same.
The figure is a longitudinal sectional front view showing a conventional connecting device. 11, 14...pipe, 12...bag nut, 1
3...flange, 15...screw part, 16...cylindrical body, 17...stopper, 18...packing.

Claims (1)

[Scope of utility model registration request] A cap nut fitted on the outside of the end of one pipe so as to be screwed into the end of the other pipe, and a flange for engaging the cap nut to prevent it from falling out and extending from the edge of the one pipe and protruding outward. , a cylindrical body whose one end is fitted inside the end of the one pipe so that the other end is fitted inside the end of the other pipe, and a stop positioning of the cylindrical body fitted into the end of the one pipe. A connecting device consisting of a stopper provided to perform the connection and a packing fitted on the outside of the cylinder.