JP3108671U - Elbow tube for feeding raw concrete made of low-alloy cast steel with a detection hole to notify the replacement time - Google Patents

Elbow tube for feeding raw concrete made of low-alloy cast steel with a detection hole to notify the replacement time Download PDF

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JP3108671U
JP3108671U JP2004006503U JP2004006503U JP3108671U JP 3108671 U JP3108671 U JP 3108671U JP 2004006503 U JP2004006503 U JP 2004006503U JP 2004006503 U JP2004006503 U JP 2004006503U JP 3108671 U JP3108671 U JP 3108671U
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detection hole
cast steel
alloy cast
low
elbow
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JP2004006503U
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祥裕 石井
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株式会社シバシン商会
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Abstract

【課題】コンクリート打設作業中において、エルボ管の破裂による生コンの飛散事故を防ぎ、安全性を優先した交換時期を知らせる検知穴付き低合金鋳鋼製生コンクリート圧送用エルボー管を提供する。
【解決手段】コンクリート打設作業中において、低合金鋳鋼製エルボ管の検知穴から、セメント・ミルクが湧出し破裂前に新品と交換することにより、生コン飛散事故を防ぎ安全性確保を図る。
【選択図】図5
The present invention provides an elbow pipe for feeding raw concrete made of low-alloy cast steel with a detection hole that prevents an accident of scattering of raw concrete due to the rupture of the elbow pipe during concrete placing work and notifies a replacement time giving priority to safety.
During concrete placing work, cement milk is spouted from a detection hole of a low alloy cast steel elbow pipe and is replaced with a new one before bursting, thereby preventing a live concrete scattering accident and ensuring safety.
[Selection] Figure 5

Description

考案の詳細な説明Detailed description of the invention

この考案は輸送管の形状が変化すると、コンクリートの流れの速度分布が変り、曲り管背面部は大きな流速を受け、同時に粗骨材図7−Cがかみあい直接、管内壁図5−TA、TBをこすり、大きな摩擦を生じるため、摩粍して配管の肉圧が図6−t1、t2の肉厚のように減肉し図7−Mのようにモルタル・ミルク漏れとともに霧散することになるので破断前に部品の交換時期を知らせる方法が不可欠だが、従来からあるエルボ管は構造用鋼管を熱間曲げ、又は冷間曲げ加工したものが主流で、出来なかった。
本案はその欠点を除くため考案されたものである。これを図面について説明すれば、生コンクリートの圧送圧力を直接受けるエルボの背面部は特にはげしい図6−t1、t2の肉厚のように配管が磨粍、減肉し破断寸前で交換するが、コスト削減の流れの中で、判断が誤まる場合が多く、その場合でも図7−M1、M2、M3の検知穴よりモルタル・ミルクが湧出す仕組のため、その時点で交換することにより霧散図7−Mや破断を防ぐことが出来る。
In this device, when the shape of the transport pipe changes, the velocity distribution of the concrete flow changes, the back of the bent pipe receives a large flow velocity, and at the same time the coarse aggregate Fig. 7-C meshes directly with the pipe inner wall diagram 5-TA, TB Since the friction is rubbed and the friction is generated, the wall pressure of the pipe is reduced as shown in FIGS. 6-t1 and t2, and the mortar and milk leak as shown in FIG. 7-M. Therefore, it is indispensable to inform the time of replacement of parts before breakage, but conventional elbow pipes are mainly made by hot bending or cold bending of structural steel pipes.
This plan was devised to eliminate the drawbacks. Explaining this with reference to the drawing, the back of the elbow that directly receives the pressure of ready-mixed concrete is replaced with a pipe that is particularly sharp as shown in FIGS. In the flow of cost reduction, the judgment is often wrong. Even in that case, because of the mechanism that mortar milk comes out from the detection hole of M1, M2, M3, mist scatter by replacing at that time 7-M and breakage can be prevented.

生コンクリート圧送用エルボ管で破断防止と軽量化の縞模様構造の背面図である。  It is a rear view of the stripe pattern structure of a fracture prevention and lightening in the elbow pipe for raw concrete pumping. 図1の右側から見たエルボ管の平面図である。  It is a top view of the elbow pipe seen from the right side of FIG. 図1の左側から見たエルボ管の平面図である。  It is a top view of the elbow pipe seen from the left side of FIG. 図3のエルボ管の正面図である。  It is a front view of the elbow pipe of FIG. 図4のB−B′概略的断面と検知穴要部拡大図である。  FIG. 5 is a schematic cross-sectional view taken along the line BB ′ of FIG. 4 and an enlarged view of a main part of a detection hole. コンクリート圧送の流速を直接受けるエルボ管の摩粍状態と考案に係る装置の要部概観的断面図である。  FIG. 3 is a schematic cross-sectional view of a main part of an apparatus according to a device and a state of wear of an elbow pipe that directly receives a flow rate of concrete pumping. 本考案の摩粍で検知穴からモルタル・ミルクが湧出す仕組を示す要部概観的断面図である。  It is principal part sectional drawing which shows the structure in which the mortar milk gushes out from a detection hole with the Maya of this invention.

符号の説明Explanation of symbols

▲1▼ 低合金鋳鋼品の90°エルボ管。
▲2▼ フランヂ(継手)部分(外径148φ)。
▲3▼ 破断防止用凹部の縞模様を示す。
▲4▼ 破断防止用凸部の縞模様を示す。
▲5▼ 低合金鋳鋼品エルボ管の使用前内径寸法(128φ)を示す。
▲5▼′ エルボ管の内径が磨粍、減肉し破断寸前内径寸法(134φ)を示す。
▲6A▼.▲6B▼.▲6C▼.検知穴3ヶ所を示す。
▲6A▼−▲6A▼″.▲6B▼−▲6B▼′.▲6C▼−▲6C▼′.検知穴部分拡大図を示す。
▲TA▼ 使用前のエルボ管内側の肉厚概略寸法(片肉7ミリメートル)を示す。
▲TB▼ 使用前のエルボ管背側凹部の肉厚概略寸法(片肉6ミリメートル)を示す。
▲TC▼ 使用前のエルボ管背側凸部の肉厚概略寸法(片肉9.5ミリメートル)を示す。
▲t1▼ 磨粍滅肉して厚みの限界に達したエルボ内側肉厚概略寸法(片肉3ミリメートル)を示す。
▲t2▼ 磨粍滅肉して厚みの限界に達したエルボ背側凹部肉厚概略寸法(片肉2ミリメートル)を示す。その時点で検知穴よりモルタル・ミルクが湧出し危険を知らせる肉厚である。
▲t3▼ 磨粍滅肉したエルボ背側凸部肉厚概略寸法(片肉5ミリメートル)を示す。
▲PC▼ 生コンクリート。
▲M▼ モルタル漏れとともに霧散する状態を示す。
▲M1▼,▲M2▼,▲M3▼,モルタル・ミルクが湧出す仕組を示す。
▲C▼ 粗骨材
(1) 90 ° elbow pipe made of low alloy cast steel.
(2) flange (joint) part (outer diameter 148φ).
(3) A striped pattern of a recess for preventing breakage is shown.
{Circle over (4)} A striped pattern of the fracture preventing convex portion is shown.
(5) Indicates the inner diameter (128φ) of the low alloy cast steel elbow before use.
(5) 'The inner diameter of the elbow tube is polished and thinned to indicate the inner diameter before breaking (134φ).
▲ 6A ▼. ▲ 6B ▼. ▲ 6C ▼. Three detection holes are shown.
(6A)-(6A) ". (6B)-(6B) '. (6C)-(6C)'.
▲ TA ▼ Shows the approximate thickness (7mm thickness) inside the elbow before use.
▲ TB ▼ Shows the approximate thickness (6 mm thickness) of the elbow tube back side recess before use.
(TC) Shows the approximate thickness (9.5 mm thickness) of the convex part on the back of the elbow tube before use.
(T1) The rough dimension of the inner thickness of the elbow that has reached the limit of thickness after grinding is shown (3 mm on one side).
(T2) The elbow dorsal recess thickness outline dimension (2 millimeters on one side) that has reached the limit of thickness after being polished. At that time, the mortar milk is coming out of the detection hole.
(T3) A rough dimension of the thickness of the elbow dorsal side convex portion (5 mm on one side) is shown.
▲ PC ▼ Ready-mixed concrete.
▲ M ▼ Shows the state of mist scattering with mortar leakage
▲ M1 ▼, ▲ M2 ▼, ▲ M3 ▼, shows the mechanism of mortar milk.
▲ C ▼ Coarse aggregate

Claims (1)

生コンクリート圧送用のエルボ管を低合金鋳鋼品にしてエルボの背面部に凸凹の縞模様の骨組にして破断防止と軽量化構造にした、生コンクリート圧送用エルボ管で、摩粍と減肉が、はげしい背面部に検知穴を設け、生コンクリートの摩粍で配管の肉厚が薄くなり、セメントミルクが検知穴より漏れ出して破断前にエルボ管の交換時期を知らせる仕組を特微とする生コンクリート圧送用エルボ管。  The elbow pipe for raw concrete is made of low-alloy cast steel, and the elbow pipe with uneven stripes on the back of the elbow to prevent breakage and reduce the weight. , With a detection hole on the backside, the thickness of the pipe is reduced by raw concrete wear, and cement milk leaks out of the detection hole and features a mechanism that informs the time to replace the elbow pipe before breaking. Elbow pipe for concrete pumping.
JP2004006503U 2004-09-24 2004-09-24 Elbow tube for feeding raw concrete made of low-alloy cast steel with a detection hole to notify the replacement time Expired - Fee Related JP3108671U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH043964U (en) * 1990-04-21 1992-01-14
JPH0582873U (en) * 1992-04-16 1993-11-09 三井石油化学工業株式会社 Food packaging bag for microwave heating
CN112976315A (en) * 2019-12-18 2021-06-18 山西大地华基建材科技有限公司 Dry-mixed mortar production system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH043964U (en) * 1990-04-21 1992-01-14
JPH0582873U (en) * 1992-04-16 1993-11-09 三井石油化学工業株式会社 Food packaging bag for microwave heating
CN112976315A (en) * 2019-12-18 2021-06-18 山西大地华基建材科技有限公司 Dry-mixed mortar production system

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