PIPE JOINT

• Main Authors: OKA KOHEI, MATSUBA HIROYUKI, MURAI TAKESHI, MONOTANE TAKESHI, SHIMIZU YOSHIRO
• Format: Patent
• Language: English; Japanese
• Published: 06.12.2018
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a pipe joint which has gap corrosion suppressed.SOLUTION: The present invention relates to a pipe joint comprising: first piping 1 having a male-side connection part 11 formed at a pipe end part; second piping 2 having a female-side connection part where a male-side connection part 21 can be inserted into the pipe end part; and a ring-shaped seal member 3 which is interposed to come into contact with an outer peripheral surface of the male-side connection part and an inner peripheral surface of the female-side connection part, facing each other when the male-side connection part is inserted into the male-side connection part, in a circumferential direction. The male-side connection part is provided with a first annular expanded pipe part 11a formed at an axial tip part thereof and a second annular expanded pipe part 11b formed on an axially rear side for the first annular expanded pipe part through a seal member mounting part 11c, and an outer peripheral surface part of the first annular expanded pipe part is provided with a plurality of circulation parts 11e in a spiral groove shape, which link a space in contact with an axial tip surface B of the first annular expanded pipe part to a fine space 11d formed between the first annular expanded pipe part of the seal member mounting part and a seal member mounted on the seal member mounting part, in a circumferential direction.SELECTED DRAWING: Figure 1 【課題】隙間腐食の発生が抑制された管継手を得る。【解決手段】管端部に形成された雄側接続部１１をもつ第一配管１と、管端部が雄側接続部２１を挿入可能な雌側接続部をもつ第二配管２と、雄側接続部を雌側接続部に挿入したときに対向する雄側接続部の外周面及び雌側接続部の内周面に周方向に沿って密着するように介在されるリング状のシール部材３を備えた管継手であって、前記雄側接続部には、その軸方向先端部に形成された第一の環状拡管部１１ａと、該第一の環状拡管部に対して軸方向後方側にシール部材装着部１１ｃを介して形成された第二の環状拡管部１１ｂとを設けると共に、第一の環状拡管部の外周面部に、該第一の環状拡管部の軸方向先端面Ｂに接する空間を、シール部材装着部における第一の環状拡管部と、該シール部材装着部に装着されたシール部材との間に形成された微小空間１１ｄに連通させる螺旋溝状の流通部１１ｅを周方向に複数設けた。【選択図】図１