JP2002061782A - Joint for interconnecting pipes having different standard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connection joint capable of firmly and simply interconnecting pipes different in standard. SOLUTION: In an integrally formed joint having two or more connection ports, at least one of the connection ports is formed based on the outside size of a pipe having standard different from that of other connection port. Since at least one of the connection ports of an integrally formed fitting is formed based on the outside diameter size of a pipe having a standard different from that of the other connection port, no part being unstable in terms of strength is present and firm connection is practicable. Further, since it is sufficiently well that only connection between a pipe and a fitting is effected, execution is simple to make and a cost required for connection of a pipe is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting pipes manufactured according to different standards.

[0002]

2. Description of the Related Art Regarding the manufacture of pipes, DIN standard, JI
There are standards established for each country, such as the S standard,
Shapes, material properties, etc. are defined. Especially for the dimensions,
There are variations among the standards, and they are not standardized between the standards. For example, for a tube having a nominal diameter of 3 / 4B, the outer diameter is 25 mm in the DIN standard and the JIS standard is 26 mm. In the case of nominal diameter 2B, the outer diameter is 63 mm (DIN standard) and the outer diameter is 6 mm.
0mm (JIS standard), 110mm outside diameter (D
(IN standard) and 114 mm in outer diameter (JIS standard).

[0003] In the plant field, since imported products from abroad are often used for equipment such as pumps and filters, the outlet pipes provided in the equipment are manufactured to DIN standard dimensions, and are connected after the outlet pipe. Pipes made in Japan,
That is, there are many combinations of pipes that use pipes manufactured according to JIS standard dimensions.

Conventionally, when connecting tubes having different standards, a special flange joint as shown in FIG. 3 has been manufactured. That is, the flange portion 71 is formed to the DIN standard size, and the ring-shaped flange 70 having the inner diameter of the JIS standard tube outer diameter is externally fitted and fixed to the end of the JIS standard tube 30. The side is
A flange joint 60 conforming to DIN standard was bonded to the end of the pipe, the flange joint 60 was joined to the ring-shaped flange 70 via a packing 83, and the connection was established by fixing with a bolt 81 and a nut 82.

[0005]

However, in the above-mentioned prior art, there is a problem that the contact area between the ring-shaped flange 70 and the JIS standard tube 30 is small, and the strength of the fixed portion becomes unstable. In addition, since a flange is used for connecting the pipes, there is a problem that the operation is troublesome.

According to the present invention, pipes having different standards are firmly
Another object of the present invention is to provide a pipe connection joint that can be easily connected.

[0007]

SUMMARY OF THE INVENTION The present invention is an integrally formed joint having two or more connection ports, wherein at least one of the connection ports has a standard different from that of the other connection ports. It was formed based on the diameter dimension.

(Operation) In the present invention, at least one of the connection ports formed integrally is formed based on a pipe outer diameter dimension different from that of the other connection ports. There is no unstable part, and the connection can be made firmly. Further, since only the connection between the pipe and the joint needs to be performed, the construction is simple, and the cost required for connecting the pipe is low.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a joint for connecting different standard pipes, showing one embodiment of the present invention. Reference numeral 10 denotes a joint for connecting different standard pipes, and in this embodiment, a two-way joint having two connection ports with a pipe. One connection port is a DIN standard port 11 formed to the same diameter as a pipe based on the DIN standard, and the other connection port is a JIS standard port 12 formed to the same diameter as a pipe based on the JIS standard. Then, the two connection ports, the DIN standard port 11 and the JIS standard port 12, are formed integrally via an adjusting portion 13 arranged at the center. The adjusting unit 13 adjusts the difference between the DIN standard port 11 and the JIS standard port 12 because the diameter is different.

The joint 10 for connecting different standard pipes may be integrally formed by injection molding or the like, or a DIN standard short pipe and a JIS standard short pipe may be bonded to the adjusting section 13 with an adhesive or heat fusion. It may be formed by bonding.

FIG. 2 is a sectional view showing an example of piping using one embodiment of the present invention. Reference numeral 20 denotes a DIN standard tube manufactured based on the DIN standard. For example, a mounting pipe provided in a pump, a filter (not shown), or the like corresponds to this. When connecting a JIS standard pipe 30 manufactured based on the JIS standard to the DIN standard pipe 20, a joint 10 for connecting different standard pipes is used.

A DIN standard joint 50 is joined to the end of the DIN standard tube 20, and the DIN standard port 11 of the different standard tube connection joint 10 is joined to the other end of the DIN standard joint 50.
The inside diameter of the connection port of the DIN standard joint 50 is formed according to the outside diameter of the DIN standard pipe, and enables connection between the DIN standard pipes. Therefore, since the DIN standard port 11 has the same diameter as the DIN standard pipe 20 manufactured based on the DIN standard, the DIN standard joint 50 can be connected by a normal piping construction method.

On the other hand, the other end of the joint 10 for connecting different standard pipes, that is, the JIS standard port 12 is connected to the JIS standard joint 5.
1 is joined. The inner diameter of the connection port of the JIS standard fitting 51 is formed in accordance with the outer diameter of the JIS standard pipe.
This enables connection between IS standard pipes. Therefore, the JIS standard port 12 has the same diameter as the JIS standard pipe 20 manufactured based on the JIS standard, so that the JIS standard joint 51 can be connected by a normal piping construction method. Then, the pipe end of the JIS standard pipe 30 is inserted into the other end of the JIS standard joint 51 and joined. In this way, if the joint 10 for connecting different standard pipes is used, the DIN standard pipe 20 and J
It can be easily connected to the IS standard pipe 30.

Although the embodiment of the present invention has been described above, the present invention can also be implemented in the following modified form. First, in the above-described embodiment, the type of the joint is a two-way joint. However, it is apparent that the present invention can be applied to a joint having three or more connection ports. In this case, at least one of the connection ports may be formed based on a pipe outer diameter dimension different from that of the other connection ports. For example, if there are three connection ports, one combination is formed based on the DIN standard, and the other two are formed based on the JIS standard. Of course, all three may be formed based on different standards. As for the standards, the DIN standard and the JIS standard have been exemplified, but there are also ASTM standards and the like.
The present invention is not limited to the types of standards, and any standards may be used.

[0015]

As described in detail above, according to the present invention, since the joint structure is simple, there is no portion that becomes unstable in strength, and the connection can be made firmly. Further, since only the connection between the pipe and the joint needs to be performed, there is an effect that the construction is simple and the cost required for connecting the pipe is reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint for connecting different standard pipes, showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an example of piping using one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DIN standard port 2 JIS standard port 3 Adjustment part 10 Joint for different standard pipe connection 20 DIN standard pipe 30 JIS standard pipe 50 DIN standard joint 51 51 JIS standard joint

Claims (1)

[Claims] An integrally formed joint having two or more connection ports, wherein at least one of the connection ports is formed based on a pipe outer diameter dimension different from that of the other connection ports. A joint for connecting different standard pipes.