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A platform for research: civil engineering, architecture and urbanism
STEEL PIPE SCREW JOINT AND MANUFACTURING METHOD OF STEEL PIPE SCREW JOINT
To achieve weight reduction in a body part by reducing wall thickness and increasing strength, and to increase tensile strength of a steel pipe.SOLUTION: A steel pipe screw joint has: a pin 2 in which a male screw 2A is formed on an outer surface of a first steel pipe 10A; and a box 3 in which a female screw 3A which can be screwed with the male screw 2A of the pin 2 is formed on an inner surface of a second steel pipe 10B. In a screw row of the pin 2 and the box 3, screw row taper parts 21, 31 are formed which are inclined with respect to a pipe axis O of the steel pipe 10 at a screw row taper angle θ1. A minimum inner diameter D1 of the pin 2 is smaller than a steel pipe inner diameter D2 of body parts 11A, 11B excluding the pin 2 and the box 3 out of the steel pipe 10. The pin 2 has a pin continuously-provided part 22 which is inclined by a pin taper angle θ2 from a male screw terminal 21a of the male screw 2A to the pin body part 11A. The pin taper angle θ2 is equal to or less than two times the screw row taper angle θ1.SELECTED DRAWING: Figure 2
【課題】薄肉化および高強度化することで本体部の軽量化を図ることができ、鋼管の引張強度を高めることができる。【解決手段】第１鋼管１０Ａの外面に雄ねじ２Ａが形成されたピン２と、第２鋼管１０Ｂの内面にピン２の雄ねじ２Ａに螺合可能な雌ねじ３Ａが形成されたボックス３と、を有し、ピン２とボックス３のねじ列は、鋼管１０の管軸Ｏに対してねじ列テーパー角度θ１で傾斜したねじ列テーパー部２１、３１が形成され、ピン２の最小内径Ｄ１は、鋼管１０のうちピン２とボックス３とを除く本体部１１Ａ、１１Ｂの鋼管内径Ｄ２より小さく、ピン２は、雄ねじ２Ａの雄ねじ終端２１ａからピン本体部１１Ａにかけてピンテーパー角度θ２だけ傾斜したピン連設部２２を有し、ピンテーパー角度θ２は、ねじ列テーパー角度θ１の２倍以下である構成の鋼管ねじ継手を提供する。【選択図】図２
STEEL PIPE SCREW JOINT AND MANUFACTURING METHOD OF STEEL PIPE SCREW JOINT
To achieve weight reduction in a body part by reducing wall thickness and increasing strength, and to increase tensile strength of a steel pipe.SOLUTION: A steel pipe screw joint has: a pin 2 in which a male screw 2A is formed on an outer surface of a first steel pipe 10A; and a box 3 in which a female screw 3A which can be screwed with the male screw 2A of the pin 2 is formed on an inner surface of a second steel pipe 10B. In a screw row of the pin 2 and the box 3, screw row taper parts 21, 31 are formed which are inclined with respect to a pipe axis O of the steel pipe 10 at a screw row taper angle θ1. A minimum inner diameter D1 of the pin 2 is smaller than a steel pipe inner diameter D2 of body parts 11A, 11B excluding the pin 2 and the box 3 out of the steel pipe 10. The pin 2 has a pin continuously-provided part 22 which is inclined by a pin taper angle θ2 from a male screw terminal 21a of the male screw 2A to the pin body part 11A. The pin taper angle θ2 is equal to or less than two times the screw row taper angle θ1.SELECTED DRAWING: Figure 2
【課題】薄肉化および高強度化することで本体部の軽量化を図ることができ、鋼管の引張強度を高めることができる。【解決手段】第１鋼管１０Ａの外面に雄ねじ２Ａが形成されたピン２と、第２鋼管１０Ｂの内面にピン２の雄ねじ２Ａに螺合可能な雌ねじ３Ａが形成されたボックス３と、を有し、ピン２とボックス３のねじ列は、鋼管１０の管軸Ｏに対してねじ列テーパー角度θ１で傾斜したねじ列テーパー部２１、３１が形成され、ピン２の最小内径Ｄ１は、鋼管１０のうちピン２とボックス３とを除く本体部１１Ａ、１１Ｂの鋼管内径Ｄ２より小さく、ピン２は、雄ねじ２Ａの雄ねじ終端２１ａからピン本体部１１Ａにかけてピンテーパー角度θ２だけ傾斜したピン連設部２２を有し、ピンテーパー角度θ２は、ねじ列テーパー角度θ１の２倍以下である構成の鋼管ねじ継手を提供する。【選択図】図２
STEEL PIPE SCREW JOINT AND MANUFACTURING METHOD OF STEEL PIPE SCREW JOINT
鋼管ねじ継手および鋼管ねじ継手の製造方法
AGATA ATSUSHI (author) / TSURU EIJI (author) / KAMEYAMA MOTONORI (author) / MATSUFUJI YUICHI (author) / NAKAJIMA TAKUMI (author) / NAKAJIMA MASARU (author) / NISHIDA MITSUGI (author)
2024-10-04
Patent
Electronic Resource
Japanese
| European Patent Office | 2023
| European Patent Office | 2022