Valve with diameter-reduced joint part, joint for diameter reduction, and pipe system using these valve and joint

Abstract

A valve easily and securely connectable to a pipe merely by tightening the housing thereof for diameter reduction without processing the connected portion of the valve, capable of absorbing vibration with a proper flexibility against the pipe joined thereto, and having excellent durability. The valve comprises a diameter-reduced joint part enabling the joining of pipes for each side independently of each other, capable of always maintaining the high sealability of the valve even when the valve is joined to and removed from the pipe, and manufacturable at advantageous cost. A sealing sleeve (3) formed of a rubber is stored in the diameter-reducible housing (2), and a valve mechanism (4) having a valve element (11) is built in the housing (2) so that flow passages in the housing (2) can be opened and closed and a flow can be controlled. The diameter-reduced joint part (18) reduces the diameter of the housing (2) to sealingly join the joining end part of the pipe (P) for joining with a sealing sleeve (3).

Description

technical field [0001] The present invention relates to a valve used for opening and closing of a flow path, flow control, etc., and particularly relates to a valve having a reducing joint portion and a reducing joint capable of hermetically joining a connecting pipe, and the valve and reducing joint using the valve and the reducing joint piping system. Background technique [0002] For example, for piping installed in air-conditioning equipment and plumbing facilities of building facilities, various piping components are combined according to installation conditions. It is necessary to install a valve with a predetermined function corresponding to the piping application. As a method of connecting the valve and the pipe, there are, for example: a flange connection method that is connected with bolts and nuts through a flange provided at the end; A threaded joint method in which the female thread part is joined; or a welding method in which the valve and the joint part of th...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned joining methods that are usually used are often restricted by the installation space of the piping. At this time, since the piping must be laid between the determined surfaces, the structure of the piping is complicated. In other cases, the piping should be bent before laying

As a result, not only piping stress occurs at joints such as valves and joints, but also the pipes joined to the valves do not have sufficient flexibility, causing problems in workability (see, for example, Figs. 1 and 2 of Patent Document 1).

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