JPH09159072A - Formed ring sealant used for pipe joint sealing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a formed ring sealant used for a pipe joint sealing method which forms a joint part having superior waterproof and anticorrosion effects. SOLUTION: In this sealing method, a clamp ring (B), a formed ring sealant (C), a fastening fitting (D), a presser ring (E) and a ring packing (F) are externally fitted around a pipe body (A), the pipe body (A) is inserted into a pipe joint(G) so as to be connected thereto by a screw, the formed ring sealant (C) is deformed by pressurization, and a sealant 6 is pushed out into a clearance formed between the clamp ring (B) and the pipe body (A) so as to chokingly seal it. In this case, the external wall 15 of a formed body 11 constituting the formed ring sealant (C) is either separated from the formed main body or formed into an easily breakable wall so that deformation and breakage of the formed body in clamping can be prevented and the sealant can be surely pressed out into the clearance between the clamp ring (C) and the pipe body (A).

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、樹脂ライニング
されたパッキン型継手、特にメカニカル管継手とこれに
接続する管体とのシール工法に使用される環状成形シー
ル材の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-lined packing type joint, and more particularly to an improvement of an annular molded seal material used in a sealing method for a mechanical pipe joint and a pipe body connected to the mechanical pipe joint.

【０００２】[0002]

【従来の技術】ガス、液体等の流体を輸送する管体と、
該管体相互を接続する継手管との接続部の防水あるいは
防食は、この部分の外側をテープでスパイラル状に巻き
つけたり、熱収縮チューブで被覆して加熱収縮させる方
法や、接続部に螺合したナットによりゴムパッキングま
たは０リングを締め付ける等の方法が採用されている。2. Description of the Related Art A pipe for transporting a fluid such as gas or liquid,
For waterproofing or anticorrosion of the joint with the joint pipe that connects the pipes to each other, the outside of this part can be spirally wound with tape, covered with a heat shrink tube to heat shrink, or screwed to the joint. A method such as tightening rubber packing or O-ring with the nut is adopted.

【０００３】最近の管体は防食の目的のために鋼管表面
に合成樹脂等でライニング層を形成したものが多く、継
手もメカニカル継手が多く使用されているが、その防食
方法としての従来のテープ巻きつけや熱収縮チューブの
被覆では施工性が悪く、満足な結果が得られていないの
が現状である。Many of the recent pipes have a lining layer made of synthetic resin or the like on the surface of the steel pipe for the purpose of anticorrosion, and mechanical joints are often used as joints. Conventional tapes are used as an anticorrosion method. At present, satisfactory workability has not been obtained due to poor workability in winding or covering the heat shrinkable tube.

【０００４】一方、樹脂ライニングされたパッキン型管
継手との水密方法として、管継手内のパッキンでシール
する工法があるが、曲げ、引張り時の水密性は不十分な
ものであった。On the other hand, as a watertight method with a resin-lined packing type pipe joint, there is a method of sealing with a packing inside the pipe joint, but the watertightness at the time of bending and pulling was insufficient.

【０００５】そこで、半流動性シール材料を充填してな
る環状成形シール材を用い、管とねじ結合し、その締め
付けにより該シール材を圧縮変形させることにより、成
形体中の半流動性シール材が管と管体との間隙に押出さ
れ、その間隙を密閉する工法を特願昭６０−１６９５６
３号によって提案した。Therefore, an annular molding sealing material filled with a semi-fluid sealing material is screwed to a pipe, and the sealing material is compressed and deformed by the tightening, whereby the semi-fluid sealing material in the molded body is compressed. Is extruded into the gap between the pipe and the pipe, and the method for sealing the gap is disclosed in Japanese Patent Application No. 60-16956.
Proposed by No. 3.

【０００６】さらに、上記工法では、その締め付け時に
留め金具が環状シール材を押しつぶす場合が生じ、その
ために環状成形シール材の位置を移動させたり、変形、
破損させ、適正なシール材の充填がなされない状態が発
生する事態が見い出され、これに対応するため、特願昭
６４−１５７１２号で、環状成形シール材に用いられて
いる成形体の形状及び材質を検討したシール材を提案し
た。Further, in the above-mentioned construction method, the fastening member sometimes crushes the annular sealing material at the time of tightening, and therefore, the position of the annular molding sealing material is moved or deformed,
It has been found that a situation occurs in which the sealing material is damaged and the sealing material is not properly filled. To cope with this, in Japanese Patent Application No. 64-15712, the shape and shape of the molded body used for the annular molding sealing material and We proposed a sealing material whose material was considered.

【０００７】[0007]

【発明が解決しようとする課題】しかしながら、締め付
け時の管体と継手管とのクリアランス等により、一部に
極度な圧縮変形がかかり、成形体の外周部が変形、破損
し、良好な防食効果を得ることが困難であるという問題
がある。However, due to the clearance between the pipe body and the joint pipe at the time of tightening, some parts are subjected to extreme compressive deformation, and the outer peripheral portion of the molded product is deformed and damaged, resulting in a good anticorrosion effect. Is difficult to obtain.

【０００８】上記締め付け時に環状成形シール材が変
形、破損してしまう原因としては、空隙部にテーパ（角
度）があり、成形体の外周部が追従しないことおよび締
め付け時に管体と管継手との間にクリアランスが有り、
変動しながら圧縮されてゆくため外周部が追従しないこ
と、などがあげられる。The cause of the deformation and damage of the annular molded seal material during the above-mentioned tightening is that the gap has a taper (angle) so that the outer peripheral portion of the molded body does not follow, and the tube and the pipe joint during tightening. There is clearance between
The outer periphery does not follow because it is compressed while changing.

【０００９】上記の点にかんがみ、管体と管継手とのシ
ール工法において、留め金具が環状成形シール材に食い
込み、または、環状成形シール材を破壊に至らしめる事
を防止するため、環状シール材に用いられている成形体
の形状について検討した結果、この発明に至ったもので
ある。In view of the above points, in the sealing method of the pipe body and the pipe joint, in order to prevent the fastener from cutting into the annular molded seal material or causing the annular molded seal material to be broken, the annular seal material is prevented. As a result of studying the shape of the molded product used in, the present invention has been achieved.

【００１０】そこで、この発明の課題は、成形体の形状
の特定化あるいは材質の一部または全部を変更して特定
した外形構造とし、留め金具の固定、成形体への留め金
具の侵入防止を図ると共に、成形体外周部の変形、破損
を防止し、シール材としての効果を損うことのないよう
な成形体を提供することにある。Therefore, an object of the present invention is to specify the shape of the molded body or to change the part or all of the material to have the specified outer structure to fix the fastener and prevent the fastener from entering the molded body. Another object of the present invention is to provide a molded product which prevents deformation and damage of the outer peripheral portion of the molded product and does not impair the effect as a sealing material.

【００１１】[0011]

【課題を解決するための手段】上記のような課題を解決
するため、この発明は、環状成形シール材を構成する成
形体の外面壁を成形体本体から分離するか易破壊壁とし
た構成を採用したものである。In order to solve the above problems, the present invention has a structure in which an outer wall of a molded body forming an annular molded sealing material is separated from a molded body or is an easily destructible wall. It was adopted.

【００１２】ここで、成形体本体は、内面壁と端壁から
なり、外面壁とで断面コ字状に形成され、その内部にシ
ール材を充填することにより環状成形シール材を構成し
ている。Here, the molded body is composed of an inner wall and an end wall, and is formed in a U-shaped cross section with the outer wall, and a ring-shaped molded sealing material is formed by filling the inside with a sealing material. .

【００１３】[0013]

【発明の実施の形態】以下、この発明の実施の形態を図
示例と共に説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１４】図２は、この発明の環状成形シール材を用
いる管継手シール工法の具体的な構造を示し、管体Ａに
締め付け環Ｂと環状成形シール材Ｃ、リング状の留め金
具Ｄ、押えリングＥ、環状パッキングＦの順に外嵌挿
し、最後に管継手Ｇを挿入し、締め付け環Ｂを回転させ
て管継手Ｇに結合させるようになっている。FIG. 2 shows a concrete structure of a pipe joint sealing method using the annular molding sealing material of the present invention, in which a tightening ring B and an annular molding sealing material C, a ring-shaped fastener D, and a presser are attached to a tubular body A. The ring E and the annular packing F are externally fitted in this order, and finally the pipe joint G is inserted, and the tightening ring B is rotated to be coupled to the pipe joint G.

【００１５】前記締め付け環Ｂは、先端内周を傾斜面１
とした拡径部２の内周に内ねじ３を該設し、外周部全体
に合成樹脂のライニング層４を設けて形成され、管継手
Ｇは先端が拡径され、その外周面に内ねじ３を螺合する
外ねじ５が形成され、内部に環状パッキンＦを収納する
ようになっている。The tightening ring B has an inclined surface 1 on the inner circumference of the tip.
The inner diameter of the expanded diameter portion 2 is provided with the inner screw 3 and the outer peripheral portion is provided with the lining layer 4 of synthetic resin. An outer screw 5 for screwing 3 together is formed so that the annular packing F is housed inside.

【００１６】図２の状態で締め付け環Ｂを回転させなが
ら管継手Ｇにねじ込んでいくと、締め付け環Ｂの傾斜面
１が環状成形シール材Ｃの外周を圧縮し、これによって
シール材６が押し出されて流動し、図３に示すように、
締め付け環Ｂと管体Ａとの間隙内を充填し、継手内部の
金属の腐食を防止するものである。When the tightening ring B is screwed into the pipe joint G while rotating the tightening ring B in the state shown in FIG. 2, the inclined surface 1 of the tightening ring B compresses the outer periphery of the annular molded seal material C, whereby the seal material 6 is pushed out. And flow, and as shown in Figure 3,
The gap between the tightening ring B and the pipe A is filled to prevent corrosion of the metal inside the joint.

【００１７】図１（ａ）乃至（ｃ）は、上記管継手シー
ル工法に用いる環状成形シール材Ｃの具体的な構造を示
している。FIGS. 1 (a) to 1 (c) show a concrete structure of an annular molding seal material C used in the pipe joint sealing method.

【００１８】図１（ａ）に示す環状成シール材Ｃは、断
面コ字状の成形体１１と、この成形体１１の内部に充填
した粘性シール材６とからなり、成形体１１は、内面壁
１２と端壁１３でＬ字状に形成した成形体本体１４と、
外面壁１５との組み合せからなり、外面壁１５は成形体
本体１４と分離され、締め付け時の圧力に応じて成形体
本体１４と移動を異なるものとし、変形や破損に耐える
構造になっている。The annular sealing material C shown in FIG. 1 (a) comprises a molded body 11 having a U-shaped cross section and a viscous sealing material 6 filled in the molded body 11. A molded body 14 formed in an L shape by the face wall 12 and the end wall 13,
The outer wall 15 and the outer wall 15 are combined with each other, and the outer wall 15 is separated from the molded body 14 and moves differently from the molded body 14 depending on the pressure at the time of tightening.

【００１９】図１（ｂ）に示す環状成形シール材Ｃは、
成形体本体１４の端壁１３と外面壁１５の連接部分の外
周に凹溝を設け、残した部分を薄肉厚の易破壊部１６と
した構造を有し、外面壁１５を移動可能にしている。The annular molding sealing material C shown in FIG. 1 (b) is
The outer wall 15 has a structure in which a concave groove is provided on the outer periphery of the connecting portion between the end wall 13 of the molded body 14 and the outer surface wall 15 and the remaining portion is formed as a thin and easily destructible portion 16 to make the outer surface wall 15 movable. .

【００２０】図１（ｃ）に示す環状成形シール材Ｃは、
成形体本体１４内に充填した粘性シール材６の外周に粉
体１７やワックスを適当な厚さで塗布、圧着等の表面処
理を行なって外面壁１５を形成した構造になっている。
上記粉体１７を使用する場合、一般的にタルク、炭酸カ
ルシウム、デンプン等、剥離効果があるものを用いれば
よく、場合により、吸水、吸油効果があってもよい。The annular molded seal material C shown in FIG. 1 (c) is
The outer wall 15 is formed by applying powder 17 or wax to the outer periphery of the viscous sealing material 6 filled in the molded body 14 with an appropriate thickness and performing surface treatment such as pressure bonding.
When the powder 17 is used, it is generally possible to use one having a peeling effect such as talc, calcium carbonate, starch or the like, and it may have a water absorbing or oil absorbing effect depending on the case.

【００２１】上記のように、環状成形シール材Ｃの成形
体１１における外面壁１５を成形体本体１４から分離す
るか易破壊壁とすることにより、締め付け環Ｂを管継手
Ｇに結合するとき、成形体本体１４が留め金具Ｄとの圧
接により変形しても、外面壁１５は成形体本体１４の変
形に影響を受けることがなく、締め付け環Ｂの傾斜面１
に沿うことになり、これにより、粘性シール材６を締め
付け環Ｂと管体Ａの間隙内へ確実に充填させることがで
き、良好な防水、防食効果を有する継目部を形成するこ
とができる。As described above, when the tightening ring B is joined to the pipe joint G by separating the outer surface wall 15 of the molded body 11 of the annular molded sealing material C from the molded body 14 or by making it an easily destructible wall, Even if the molded body 14 is deformed by pressure contact with the fastener D, the outer surface wall 15 is not affected by the deformation of the molded body 14, and the inclined surface 1 of the tightening ring B is
By virtue of this, the viscous sealing material 6 can be surely filled in the gap between the tightening ring B and the tubular body A, and a seam having good waterproof and anticorrosive effects can be formed.

【００２２】[0022]

【発明の効果】以上のように、この発明によると、環状
成形シール材の成形体における外面壁を成形体本体から
分離するか易破壊壁としたので、締め付け環と管継手の
結合時に外面壁は締め付け環の傾斜面に沿うことにな
り、留め金具の侵入および食い込みを防止することがで
き、かつ締めつけ時の成形体本体の変形、破損も防止す
ることができ、これによって良好な防水、防食効果を有
する継目部を形成することができる。As described above, according to the present invention, since the outer surface wall of the molded body of the annular molded sealing material is separated from the molded body or made into the easily destructible wall, the outer surface wall is formed when the tightening ring and the pipe joint are connected. Since it will follow the inclined surface of the tightening ring, it can prevent the fasteners from entering and biting, and also prevent the deformation and damage of the molded body during tightening, which results in good waterproofing and corrosion protection. It is possible to form an effective seam.

【図面の簡単な説明】[Brief description of the drawings]

【図１】（ａ）乃至（ｃ）は、この発明に係る環状成形
シール材のそれぞれ異なった構造と留め金具の関係を示
す拡大断面図。1 (a) to 1 (c) are enlarged cross-sectional views showing the relationship between different structures and fasteners of an annular molded seal material according to the present invention.

【図２】この発明の環状成形シール材を用いてシール工
法を実施する状態を縦断面図。FIG. 2 is a vertical cross-sectional view showing a state in which a sealing method is carried out using the annular molded sealing material of the present invention.

【図３】同上の実施後の結合状態を示す縦断面図。FIG. 3 is a vertical cross-sectional view showing a combined state after the same as above.

【符号の説明】[Explanation of symbols]

Ａ 管体 Ｂ 締め付け環 Ｃ 環状成形シール材 Ｄ 留め金具 Ｅ 押えリング Ｆ 環状パッキン Ｇ 管継手 １ 傾斜面 ２ 拡径部 ３ 内ねじ ４ ライニング層 ５ 外ねじ ６ シール材 １１ 成形体 １２ 内面壁 １３ 端壁 １４ 成形体本体 １５ 外面壁 １６ 易破壊部 １７ 粉体 A pipe body B tightening ring C annular molding seal material D fastening metal fitting E ring ring packing G pipe joint 1 inclined surface 2 expanded part 3 inner screw 4 lining layer 5 outer screw 6 sealing material 11 molded body 12 inner surface wall 13 end Wall 14 Main body 15 Outer wall 16 Easily destructible part 17 Powder

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 管体に締め付け環、環状成形シール材、
留め金具、押えリングおよび環状パッキンを外嵌すると
共に、前記管体の端部を管継手に挿入し、管継手と締め
付け環をねじ結合して前記シール材を加圧変形させ、締
め付け環と管体の間隙に押出して該間隙を閉塞密閉する
管継手シール工法において、環状成形シール材を構成す
る成形体の外面壁を成形体本体から分離するか易破壊壁
としたことを特徴とする管継手シール工法に用いる環状
成形シール材。1. A tightening ring on a tubular body, an annular molded seal material,
The fitting, the presser ring, and the annular packing are externally fitted, and the end of the pipe body is inserted into the pipe joint, and the pipe joint and the tightening ring are screwed to deform the sealing material under pressure, and the tightening ring and the pipe are attached. In a pipe joint sealing method of extruding into a body gap and sealing the gap, a pipe joint characterized in that an outer wall of a molded body forming an annular molded sealing material is separated from a molded body or is made into an easily destructible wall. Ring-shaped sealing material used in the sealing method.