A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
STAND PIPE
PROBLEM TO BE SOLVED: To eliminate accidents involving a stand pipe connected to a water hydrant and others, such as fracture of a main pipe at a connection between the main pipe and a receptacle and jumping out of a dislocated engaging pawl caused by various types of force exerted, including vibration from an explosion of remnant air in a water pipe, water hammering that takes place when a valve is closed, reactive force from water at a time of spraying, etc.SOLUTION: A stand pipe for a water hydrant comprises a main pipe having a receptacle and an elbow having a hose connection port. An annular cylinder part that holds an outer peripheral surface of the main pipe is formed at a cylinder part of a connection member on the receptacle, the annular cylinder part extending from the cylinder part of the connection member provided with an inner screw, or being held so as to connect with the cylinder part of the connection member. The configuration of the stand pipe mitigates concentration of bending stress exerted on an outer screw part of the main pipe, and ensures safety.SELECTED DRAWING: Figure 1
【課題】 消火栓等に接続するスタンドパイプは、水道管に残る空気の炸裂による振動、弁の締切り時に発生するウォーターハンマー、放水による水の反動力等さまざまな力が作用し、主管と受け口部の部分から主管が破断する、係止め爪が外れて飛び出す等の事故があった。【解決手段】 受け口部を備えた主管と、ホース接続口を備えたエルボとで構成した消火栓用のスタンドパイプで、受け口部に設けてなる連結部材の筒部には、主管の外周面を抱持する環状筒部を形成し、環状筒部は、内螺子を備えた連結部材の筒部より延設する構成、又は連結部材の筒部に繋がるように抱持する構成とした消火栓用のスタンドパイプである。主管の外螺子部に作用する曲げ応力の応力集中を緩和できる。安全性が確保される。【選択図】 図１
STAND PIPE
PROBLEM TO BE SOLVED: To eliminate accidents involving a stand pipe connected to a water hydrant and others, such as fracture of a main pipe at a connection between the main pipe and a receptacle and jumping out of a dislocated engaging pawl caused by various types of force exerted, including vibration from an explosion of remnant air in a water pipe, water hammering that takes place when a valve is closed, reactive force from water at a time of spraying, etc.SOLUTION: A stand pipe for a water hydrant comprises a main pipe having a receptacle and an elbow having a hose connection port. An annular cylinder part that holds an outer peripheral surface of the main pipe is formed at a cylinder part of a connection member on the receptacle, the annular cylinder part extending from the cylinder part of the connection member provided with an inner screw, or being held so as to connect with the cylinder part of the connection member. The configuration of the stand pipe mitigates concentration of bending stress exerted on an outer screw part of the main pipe, and ensures safety.SELECTED DRAWING: Figure 1
【課題】 消火栓等に接続するスタンドパイプは、水道管に残る空気の炸裂による振動、弁の締切り時に発生するウォーターハンマー、放水による水の反動力等さまざまな力が作用し、主管と受け口部の部分から主管が破断する、係止め爪が外れて飛び出す等の事故があった。【解決手段】 受け口部を備えた主管と、ホース接続口を備えたエルボとで構成した消火栓用のスタンドパイプで、受け口部に設けてなる連結部材の筒部には、主管の外周面を抱持する環状筒部を形成し、環状筒部は、内螺子を備えた連結部材の筒部より延設する構成、又は連結部材の筒部に繋がるように抱持する構成とした消火栓用のスタンドパイプである。主管の外螺子部に作用する曲げ応力の応力集中を緩和できる。安全性が確保される。【選択図】 図１
STAND PIPE
スタンドパイプ
WATANABE TOMOYUKI (author) / KUBOTA YUJI (author) / ICHIKATAI TOSHIKAZU (author) / KITAGAWA SHIGEKI (author) / NODA RYOJI (author) / NODA TOSHIYUKI (author) / ICHIOKA YUSUKE (author) / MAEDA MOCHI (author)
2016-02-08
Patent
Electronic Resource
Japanese