JPH071357U - Airtight stopper for perforation hole in pipe wall - Google Patents
Airtight stopper for perforation hole in pipe wallInfo
- Publication number
- JPH071357U JPH071357U JP7447992U JP7447992U JPH071357U JP H071357 U JPH071357 U JP H071357U JP 7447992 U JP7447992 U JP 7447992U JP 7447992 U JP7447992 U JP 7447992U JP H071357 U JPH071357 U JP H071357U
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- JP
- Japan
- Prior art keywords
- pipe
- hole
- plug
- wall
- airtight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
(57)【要約】 （修正有）
【目的】管側壁に形成された穿孔穴を弾性栓体で閉塞す
る際に、管内部に突出物を出すことがなく、また管内の
圧力に十分抗して密閉状態が得られる気密栓を提供す
る。
【構成】管壁穿孔穴２に対する嵌合部９の内端面９ａを
管１の内壁面に沿った曲面形状とした弾性栓体４を、内
外両面にあてがった内面板５と外面板６で圧縮挾持して
穿孔穴への嵌合部を外径方向に膨脹するようにした気密
栓３で、内面板は弾性栓体の内端面に沿った曲面形状を
有し、この内面板に植設したボルト７を弾性栓体の中央
部に形成した貫通孔１０及び外面板の挿通孔１１を通し
て突出させ、締付ナット８を螺合した。
(57) [Summary] (Modified) [Purpose] When the perforation hole formed in the side wall of the pipe is closed with an elastic plug, no protrusion is made inside the pipe, and the pressure inside the pipe is sufficiently resisted. Provided is an airtight stopper capable of obtaining a sealed state. [Structure] An elastic plug body (4) having an inner end surface (9a) of a fitting portion (9) for a bore hole (2) in a curved surface along the inner wall surface of a tube (1) is compressed by an inner surface plate (5) and an outer surface plate (6) applied to both inner and outer surfaces. It is an airtight plug 3 that is sandwiched so as to expand the fitting portion into the drilled hole in the outer diameter direction. The inner surface plate has a curved shape along the inner end surface of the elastic plug body, and is planted in this inner surface plate. The bolt 7 was projected through the through hole 10 formed in the central portion of the elastic plug and the insertion hole 11 of the outer plate, and the tightening nut 8 was screwed.
Description
【０００１】[0001]
本考案は、ガス配管等の管体側壁に穿孔穴を形成した場合において、この穿孔 穴を閉塞するために使用する気密栓に関するものである。 The present invention relates to an airtight plug used to close a perforation hole when a perforation hole is formed in a side wall of a pipe such as a gas pipe.
【０００２】[0002]
管体端末の開口部を密封シールする閉塞栓は、各種の構造体が提供されている が、管側壁に形成した穿孔穴の閉塞栓については、ほとんど提案がなされていな いのが現状である。 Various types of structures are provided for the obstruction plugs that hermetically seal the opening of the tubular body end, but at present, most proposals have not been made for the obstruction plugs for the perforation holes formed in the pipe side wall. .
【０００３】 ところで、ガス配管における低圧鋳鉄管の継手部漏洩対策として、低圧本管継 手活管修繕工法（ライブジョイントシール工法）が開発されている。これは、活 管状態（ガスを流したまま）で管の内面から継手部を検知してシールする工法で 、低圧本管に管径の１／２程度の穿孔穴をあけ、ランチャーを取り付けてガスを 漏らさない状態でパッカーを挿入し、継手部を検知した後、ガス圧によってパッ カーを膨脹させ、シール剤を継手隙間のヤーン部分に注入してシールすることに よって、継手漏洩の修繕及び予防を行うものである。By the way, a low-pressure main pipe joint live pipe repair method (live joint seal method) has been developed as a countermeasure against leakage of the joint portion of the low-pressure cast iron pipe in the gas pipe. This is a construction method that detects the joint from the inner surface of the pipe in the active pipe state (while gas is flowing) and seals it. After inserting the packer without leaking gas and detecting the joint, expand the packer by the gas pressure and inject the sealant into the yarn part of the joint gap to seal the joint. It is to prevent.
【０００４】 低圧本管に管径の１／２程度の穿孔穴をあけるには、ランチャー取付台とノー ブローカバーを管の穿孔部が中心になるように固定した後、穿孔工具を使って穿 孔するが、穿孔後、次の作業に移るまでの間、ガスの多量流出によってノーブロ ーカバーが膨脹するなどの不具合が発生するのを防止するため、穿孔穴は一旦閉 じておかなければならない。また、継手間隙にシール剤を注入し終ってランチャ ーを取り外した後は、穿孔穴を完全な閉塞状態に保っておかなければならない。 そのためにはゴムなどの弾性体で成形された栓体によって穿孔穴を閉塞すること が必要で、この栓体による有効な閉塞状態が得られるか否かが上記低圧本管継手 活管修繕工法の一つの重要なポイントとなっている。To make a hole of about 1/2 the diameter of the low pressure main pipe, fix the launcher mount and no blow cover so that the hole of the pipe is at the center, and then use a drilling tool. Although the holes are formed, the holes must be closed once in order to prevent problems such as expansion of the no-blowing cover due to a large amount of gas outflow between the holes and the next work. In addition, after the sealant has been injected into the joint gap and the launcher is removed, the hole must be kept completely closed. For that purpose, it is necessary to close the perforation hole with a plug body made of an elastic material such as rubber. Whether or not an effective closed state can be obtained with this plug body is determined by the above-mentioned low-pressure main joint live pipe repair method. This is one important point.
【０００５】[0005]
ところで、このような弾性栓体によって有効な密封閉塞状態を得ることについ ての困難性の一は、管の側壁に穿孔穴が設けられる点にある。栓体を開口部に圧 入して固定する方法としては、例えば、図５に示すように、瓶の口に用いられる コーン状のゴム栓、コルク栓等のような弾性栓体１２をその摩擦抵抗のみで固定 するものが最も簡単な方法といえる。しかし、管の端末開口部の閉塞においては 比較的容易であるが、鋳鉄管や鋼管の側壁に管径の１／２程度の径の穿孔穴を開 けたときの開口部の周壁面積は、鋳鉄管や鋼管の肉厚部分によって得られるのみ で極めて小さく、栓体と開口部内壁との摩擦抵抗によって栓体を固定することは 難しく、管内を流れるガスの圧力（約２３０ｍｍＡｑ）によって栓体は開口部か ら抜け出てしまう。 By the way, one of the difficulties in obtaining an effective sealed closed state by such an elastic plug is that a perforation hole is provided in the side wall of the pipe. As a method for press-fitting and fixing the stopper in the opening, for example, as shown in FIG. 5, the elastic stopper 12 such as a cone-shaped rubber stopper or cork stopper used for the mouth of the bottle is rubbed. The simplest method is to fix it only with a resistor. However, although it is relatively easy to close the end opening of the pipe, the peripheral wall area of the opening when the perforation hole of about 1/2 the pipe diameter is opened in the side wall of the cast iron pipe or steel pipe is It is extremely small because it is obtained only by the thick part of the pipe or steel pipe, and it is difficult to fix the plug due to the frictional resistance between the plug and the inner wall of the opening. The pressure of the gas flowing in the pipe (about 230 mmAq) causes the plug to open. Get out of the department.
【０００６】 管内部にシール用部材を突設して栓体とシール用部材の摩擦抵抗面積を増大さ せることも考えられるが、ガス配管においては採用することはできない。すなわ ち、管の内面に突起物などが突出していると、本管の更新を目的とする樹脂ライ ニング等の施工時に、管の内面を研磨するピグやラニイングピグを通過させるの に障害となる。It is possible to increase the frictional resistance area between the plug and the sealing member by providing a sealing member inside the pipe, but this cannot be adopted in gas piping. That is, if a projection or the like is projected on the inner surface of the pipe, it will be an obstacle to pass a pig for polishing the inner surface of the pipe or a running pin when the resin lining for the purpose of renewing the main pipe is installed. .
【０００７】 従って、上記のように突設部材を設けて栓体を機械的に固定するような方法も 選べない。また、栓体は継手間隙にシール剤を注入し終わってランチャーを取り 外した後、穿孔穴を閉じておくためにも用いられるが、この場合、通常ランチャ ー取付台と共に低圧本管に固定した状態で埋設されるので、配管内に対する栓体 自体の突出も認められない。従って図３のように弾性栓体１２の内方部が管内に 突出するような閉塞状態をとることはできない。Therefore, the method of mechanically fixing the stopper by providing the protruding member as described above cannot be selected. The plug is also used to close the perforation hole after the sealant has been injected into the joint gap and the launcher has been removed.In this case, it is usually fixed to the low pressure main pipe together with the launcher mount. Since it is buried in the state, no protrusion of the plug itself into the pipe is observed. Therefore, as shown in FIG. 3, the elastic plug 12 cannot be closed so that the inner part of the elastic plug 12 projects into the pipe.
【０００８】 そこで、この考案の目的とするところは、管側壁に形成された穿孔穴を密閉シ ールする気密栓において、管内部に突出物を出すことがなく、また管内の圧力に 十分抗して密閉状態が得られる気密栓を提供するところにある。Therefore, an object of the present invention is to provide an airtight plug that seals a perforation hole formed in a side wall of a pipe without causing a protrusion in the pipe and sufficiently resisting the pressure inside the pipe. The present invention is to provide an airtight stopper which can be sealed.
【０００９】[0009]
上記目的達成のため、本考案においては、管壁の穿孔穴に嵌合した弾性栓体の 嵌合部を外部的手段によって外径方向に膨脹し、嵌合部外周面を穿孔穴周壁面に 圧接シールするようにしたことを特徴としている。 In order to achieve the above object, in the present invention, the fitting portion of the elastic plug body fitted in the bore hole of the pipe wall is expanded in the outer diameter direction by an external means, and the outer peripheral surface of the fitting portion is made into the peripheral wall surface of the bore hole. The feature is that it is designed to be pressure-contacted and sealed.
【００１０】 すなわち、本考案に係る管壁穿孔穴の気密栓は、管壁穿孔穴を閉塞する弾性栓 体と、この弾性栓体を内外両面から挾持し、穿孔穴に嵌合した弾性栓体の嵌合部 を外部的手段によって外径方向に膨脹して嵌合部外周面を穿孔穴周壁面に圧接シ ールする手段とで構成されるもので、さらに詳しくは、管壁穿孔穴に対する嵌合 部の内端面を管の内壁面に沿った曲面形状とし、中央部に貫通孔を設けた弾性栓 体と、この弾性栓体の内端面に沿った曲面形状を有し、前記貫通孔を通して栓体 外面から突出させるボルトを植設した内面板と、ボルトの挿通孔を有し、栓体外 面に当てがわれる外面板と、前記ボルトに螺合する締付ナットとの組み合わせか らなり、ナットの締め付けにより、穿孔穴に嵌合した弾性栓体の嵌合部を外径方 向に膨脹して嵌合部外周面を穿孔穴周壁面に圧接シールするようにしたことを特 徴とするものである。That is, an airtight plug for a pipe wall perforation hole according to the present invention includes an elastic plug body that closes the pipe wall perforation hole and an elastic plug body that holds the elastic plug body from both inside and outside and fits into the perforation hole. Means for expanding the fitting part of the fitting part in the outer diameter direction by an external means to press-contact the outer peripheral surface of the fitting part with the peripheral wall surface of the hole for drilling. The inner end surface of the fitting part has a curved surface shape along the inner wall surface of the pipe, and the elastic plug body has a through hole in the center part, and the curved shape along the inner end surface of the elastic plug body. It consists of a combination of an inner surface plate with a bolt that projects from the outer surface of the plug body, an outer surface plate that has a bolt insertion hole and is applied to the outer surface of the plug body, and a tightening nut that is screwed into the bolt. By tightening the nut, the fitting part of the elastic plug that fits in the hole is diametrically oriented. The feature is that the outer peripheral surface of the fitting portion is pressed against the peripheral wall surface of the perforation hole to be sealed by pressure.
【００１１】 弾性栓体は合成ゴムのような高分子弾性材料から成形するのが望ましく、弾性 栓体を挾持する内面板及び外面板は、金属、硬質プラスチックいずれでも良い。 また、弾性栓体の嵌合部外周面を管壁穿孔穴に向って先細りのテーパー面とすれ ば、穿孔穴に対する圧入が容易である。The elastic plug body is preferably molded from a polymeric elastic material such as synthetic rubber, and the inner surface plate and the outer surface plate for holding the elastic plug body may be either metal or hard plastic. Further, if the outer peripheral surface of the fitting portion of the elastic plug is tapered toward the hole for piercing the pipe wall, it is easy to press fit into the hole.
【００１２】 管内壁面の曲率（Ｒ 1）、弾性栓体の内端面の曲率（Ｒ 2）及び内面板の曲率 （Ｒ 3）は、Ｒ 1＝Ｒ 2≧Ｒ 3の関係が望ましい。特に管壁が薄い場合、Ｒ 2＞ Ｒ 3とすれば、弾性栓体の嵌合部が外径方向に膨脹するとともに、内端面周側縁 が穿孔穴周囲の管内壁面に圧接されるため、栓の抜けが防止される。The curvature (R 1) of the inner wall surface of the pipe, the curvature (R 2) of the inner end surface of the elastic plug and the curvature (R 3) of the inner surface plate desirably satisfy the relationship of R 1 = R 2 ≧ R 3. Especially when the pipe wall is thin, if R 2> R 3 is satisfied, the fitting portion of the elastic plug expands in the outer diameter direction and the peripheral edge of the inner end surface is pressed against the inner wall surface of the pipe around the perforation hole. The stopper is prevented from coming off.
【００１３】[0013]
上記のような気密栓を使用した場合、管壁穿孔穴は、嵌合部の内端面が管の内 壁面に沿った曲面形状を有する弾性栓体で閉塞されるため、管内に突出物のない 閉塞状態が得られる。 When the above-mentioned airtight plug is used, the inner wall of the fitting part of the hole for piercing the pipe wall is closed by the elastic plug that has a curved shape along the inner wall surface of the pipe, so there is no protrusion inside the pipe. A closed state is obtained.
【００１４】 また、締付ナットを締め付けることにより、嵌合部を径方向外側に膨脹して嵌 合部外周面を穿孔穴周壁面に圧接するため、管内圧が作用した場合にも管内の圧 力に十分抗して完全な密閉状態が得られる。Further, by tightening the tightening nut, the fitting portion expands outward in the radial direction to press the outer peripheral surface of the fitting portion against the peripheral wall surface of the perforation hole. A perfect seal can be obtained by sufficiently resisting the force.
【００１５】 したがって、本考案による気密栓を使用すれば、ガス配管における継手部漏洩 対策として開発された低圧本管継手活管修繕工法を有効に実施し得るとともに、 各種管壁の穿孔穴を効果的に閉塞することができる。Therefore, the use of the airtight plug according to the present invention makes it possible to effectively carry out the low-pressure main pipe joint live pipe repairing method developed as a countermeasure for the joint leakage in the gas pipe, and also to make holes in various pipe walls effective. Can be occluded.
【００１６】[0016]
以下、添附図面に示した実施例について説明する。 Hereinafter, embodiments shown in the accompanying drawings will be described.
【００１７】 図１は、本考案に係る管壁穿孔穴の気密栓の一実施例をその使用状態において 示した縦断面図で、１はガス配管における低圧鋳鉄管等の管体、２はこの管体１ の管壁に形成した穿孔穴、３はこの穿孔穴２を閉塞している気密栓である。FIG. 1 is a vertical cross-sectional view showing an embodiment of an airtight plug for a hole for piercing a pipe wall according to the present invention in a use state, wherein 1 is a pipe body such as a low pressure cast iron pipe in a gas pipe, and 2 is this. The perforated holes 3 formed in the tube wall of the tubular body 1 are airtight plugs that close the perforated holes 2.
【００１８】 気密栓３は、図示の通り、合成ゴム材料からなる弾性栓体４を主体とし、この 弾性栓体４を内外両面から挾持した内面板５と外面板６、及び内面板５に植設さ れたボルト７とこのボルトに螺合する締付ナット８によって構成されている。As shown in the figure, the airtight plug 3 is mainly composed of an elastic plug body 4 made of a synthetic rubber material, and the elastic plug body 4 is planted on an inner surface plate 5, an outer surface plate 6 and an inner surface plate 5 sandwiched from both inner and outer surfaces. It is composed of a bolt 7 provided and a tightening nut 8 screwed onto the bolt.
【００１９】 弾性栓体４は、管壁穿孔穴２に対する嵌合部９の内端面９ａが管の内壁面に沿 った曲面形状に構成され、中央部にはボルト７を挿通する貫通孔１０が形成され ている。内面板５は弾性栓体の内端面に沿った曲面形状を有し、外面板６にはボ ルト７の挿通孔１１が形成されている。なお、弾性栓体４の外周面は穿孔穴２に 向って先細りのテーパー面とされ、穿孔穴２に対する圧入を容易としている。The elastic plug body 4 has a curved surface shape in which the inner end surface 9 a of the fitting portion 9 for the pipe wall bore hole 2 is along the inner wall surface of the pipe, and the through hole 10 through which the bolt 7 is inserted is formed in the central portion. Has been formed. The inner surface plate 5 has a curved shape along the inner end surface of the elastic plug body, and the outer surface plate 6 is formed with an insertion hole 11 for the bolt 7. The outer peripheral surface of the elastic plug 4 is a tapered surface that tapers toward the hole 2 to facilitate press fitting into the hole 2.
【００２０】 管壁穿孔穴２を閉塞する場合、弾性栓体４の嵌合部９を管壁穿孔穴２に圧入し て、締付ナット８を締付ければ、内面板５と外面板６によって弾性栓体４が圧縮 される反面、外径方向に膨脹するので嵌合部外周面が穿孔穴２の周壁面に圧接さ れて強固なシール状態が得られ、弾性栓体４による管壁穿孔穴２の密封シールが 完了する。なお、弾性栓体４に鍔部ないし段部を設けて嵌合部９の嵌合深さを規 制しておけば、弾性栓体４が管内部に突出する懸念がない。When the pipe wall drilling hole 2 is closed, the fitting portion 9 of the elastic plug body 4 is press-fitted into the pipe wall drilling hole 2 and the tightening nut 8 is tightened, whereby the inner surface plate 5 and the outer surface plate 6 are used. While the elastic plug 4 is compressed, it expands in the outer diameter direction, so that the outer peripheral surface of the fitting portion is pressed against the peripheral wall surface of the perforation hole 2 to obtain a strong sealing state, and the elastic plug 4 perforates the pipe wall. The hermetic seal of hole 2 is completed. If the elastic plug body 4 is provided with a flange or a step to control the fitting depth of the fitting portion 9, there is no concern that the elastic plug body 4 projects into the pipe.
【００２１】 また、この例では管内壁面の曲率（Ｒ 1）、弾性栓体の内端面の曲率（Ｒ 2） 及び内面板の曲率（Ｒ 3）は、Ｒ 1＝Ｒ 2＝Ｒ 3としているが、前述の通り、管 壁が薄い場合には、Ｒ 1＝Ｒ 2＞Ｒ 3とすることが望まれる。Further, in this example, the curvature (R 1) of the inner wall surface of the pipe, the curvature (R 2) of the inner end surface of the elastic plug and the curvature (R 3) of the inner surface plate are R 1 = R 2 = R 3. However, as described above, when the tube wall is thin, it is desired that R 1 = R 2> R 3.
【００２２】 次に、この気密栓を用いて管壁穿孔穴を閉塞してその密封シール状態をテスト した結果を示す。Next, the results of testing the hermetically sealed state by closing the bore hole of the pipe wall using this airtight plug will be shown.
【００２３】 ［実験例１］ 管口径（Ａ）２００mm、管厚（Ｔ）１１mm、穿孔穴径１００mmとした管のシー ル状況をテストした。使用した気密栓の諸元は次の通りである。[Experimental Example 1] The seal condition of a pipe having a pipe diameter (A) of 200 mm, a pipe thickness (T) of 11 mm, and a hole diameter of 100 mm was tested. The specifications of the airtight stopper used are as follows.
【００２４】 栓体の最大径（Ｄ）＝（Ａ）×（１／２）＋８＝１０８mm 栓体内端面の曲率（Ｒ 2）＝管内壁面の曲率（Ｒ 1）＝内面板の曲率（Ｒ 3) 栓体中心部の厚み＝（Ｔ）×２．５＝２７．５mm 栓体の外周面の傾斜角度＝１１° このような気密栓を穿孔穴に圧入し、内面板と外面板間で締付けた後、管の内 圧を０．３ｋｇ／ｃｍ2 まで上げたが、気密栓は穿孔穴から抜けること無く良好 な密封シール状態が得られた。Maximum diameter of plug (D) = (A) × (1/2) + 8 = 108 mm Curvature of the end face of the plug (R 2) = curvature of tube inner wall (R 1) = curvature of inner surface plate (R 3 ) Thickness of central part of plug = (T) x 2.5 = 27.5 mm Inclination angle of outer peripheral surface of plug = 11 ° Such an airtight plug is press-fitted into the hole and tightened between the inner and outer plates. After that, the internal pressure of the tube was increased to 0.3 kg / cm 2 , but the airtight stopper did not come out from the perforation hole and a good hermetically sealed state was obtained.
【００２５】 ［実験例２］ 管口径（Ａ）２００mm、管厚（Ｔ）６mm、穿孔穴径１００mmとした管のシール 状況をテストした。使用した気密栓の諸元は次の通りである。[Experimental Example 2] The sealing condition of a pipe having a pipe diameter (A) of 200 mm, a pipe thickness (T) of 6 mm, and a hole diameter of 100 mm was tested. The specifications of the airtight stopper used are as follows.
【００２６】 栓体の最大径（Ｄ）＝（Ａ）×（１／２）＋８＝１０８mm 栓体内端面の曲率（Ｒ 2）＝管内壁面の曲率（Ｒ 1）＞内面板の曲率（Ｒ 3) （栓体内端面の円弧半径＝管内壁面の円弧半径＝１００mm） （内面板の円弧半径＝１５０mm） 栓体中心部の厚み＝（Ｔ）×４＝２４mm 栓体の外周面の傾斜角度＝８° このような気密栓を穿孔穴に圧入し、内面板と外面板間で締付けた後、管の内 圧を０．３ｋｇ／ｃｍ2 まで上げたが、気密栓は穿孔穴から抜けること無く良好 な密封シール状態が得られた。Maximum diameter of plug (D) = (A) × (1/2) + 8 = 108 mm Curvature of end face of plug (R 2) = curvature of inner wall of pipe (R 1)> curvature of inner plate (R 3 ) (Arc radius of the end face of the stopper = Arc radius of the inner wall surface of the pipe = 100 mm) (Arc radius of the inner plate = 150 mm) Thickness of the center of the stopper = (T) x 4 = 24 mm Angle of inclination of the outer peripheral surface of the stopper = 8 ° After press-fitting such an airtight plug into the hole and tightening it between the inner and outer plates, the internal pressure of the pipe was raised to 0.3 kg / cm 2 , but the airtight plug did not come out from the hole and was good. A good hermetically sealed condition was obtained.
【００２７】[0027]
以上詳述したところから明らかな通り、本考案に係る管壁穿孔穴の気密栓は、 管壁に形成された穿孔穴を閉塞シールする場合において、管内に突出物を生じる ことがなく、しかも外部手段によって弾性栓体の嵌合部を外径方向に膨脹するこ とによって、嵌合部外周面を穿孔穴周壁面に圧接シールするようにしたので、管 内圧力に抗して良好な閉塞シール状態が得られるものであり、ガス配管における 継手部漏洩対策として開発された低圧本管継手活管修繕工法を有効に実施し得る とともに、各種管壁の穿孔穴も効果的に閉塞し得るものである。 As is clear from the above detailed description, the airtight plug for the perforation hole of the pipe wall according to the present invention does not produce a protrusion in the pipe when the perforation hole formed in the pipe wall is closed and sealed, and the external By expanding the fitting portion of the elastic plug in the outer diameter direction by means of the means, the outer peripheral surface of the fitting portion is pressed against the peripheral wall surface of the hole to seal, so that a good closed seal can be achieved against the internal pressure of the pipe. It is possible to effectively carry out the low-pressure main pipe joint live pipe repair method developed as a countermeasure for joint leakage in gas pipes, and also to effectively block the drill holes in various pipe walls. is there.
【図１】本考案に係る管壁穿孔穴の気密栓の一実施例を
その使用状態において示した縦断面図。FIG. 1 is a vertical cross-sectional view showing an embodiment of an airtight stopper of a hole for piercing a pipe wall according to the present invention in its use state.
【図２】同平面図。FIG. 2 is a plan view of the same.
【図３】同気密栓の分解状態を示す縦断面図。FIG. 3 is a vertical sectional view showing a disassembled state of the airtight stopper.
【図４】同気密栓における弾性栓体とボルト付内面板の
側面図。FIG. 4 is a side view of an elastic plug body and an inner plate with bolts in the airtight plug.
【図５】従来の弾性栓体の一例を示す縦断面図。FIG. 5 is a vertical cross-sectional view showing an example of a conventional elastic plug body.
１……管体 ２……穿孔穴 ３……気密栓 ４……弾性栓体 ５……内面板 ６……外面板 ７……ボルト ８……締付ナット ９……嵌合部 ９ａ…内端面 １０…貫通孔 １１…挿通孔 1 ... Pipe 2 ... Drilled hole 3 ... Airtight plug 4 ... Elastic plug 5 ... Inner surface plate 6 ... Outer surface plate 7 ... Bolt 8 ... Tightening nut 9 ... Fitting part 9a ... Inside End surface 10 ... Through hole 11 ... Insertion hole
Claims (2)
された穿孔穴を密閉シールする気密栓において、管壁穿
孔穴に対する嵌合部の内端面を管の内壁面に沿った曲面
形状とし、中央部に貫通孔を設けた弾性栓体と、この弾
性栓体の内端面に沿った曲面形状を有し、前記貫通孔を
通して栓体外面から突出させるボルトを植設した内面板
と、ボルトの挿通孔を有し、栓体外面に当てがわれる外
面板と、前記ボルトに螺合する締付ナットとの組み合わ
せからなり、ナットの締め付けにより、穿孔穴に嵌合し
た弾性栓体の嵌合部を外径方向に膨脹させて嵌合部外周
面を穿孔穴周壁面に圧接シールするようにした管壁穿孔
穴の気密栓。1. An airtight plug for hermetically sealing a bore hole formed in a side wall of various pipe bodies such as a cast iron pipe and a steel pipe, wherein an inner end face of a fitting portion for the pipe wall bore hole is a curved surface along an inner wall face of the pipe. An elastic plug having a shape and a through hole in the center, and an inner surface plate having a curved shape along the inner end surface of the elastic plug and having bolts protruding from the outer surface of the plug through the through hole. , A combination of an outer surface plate having a bolt insertion hole and applied to the outer surface of the plug body, and a tightening nut screwed to the bolt, and by tightening the nut, the elastic plug body fitted in the drilled hole is formed. An airtight plug for a bore hole in a pipe wall, in which the fitting portion is expanded in the outer diameter direction so that the outer peripheral surface of the fitting portion is pressure-contacted with the peripheral wall surface of the bore hole.
率よりも小さい請求項１記載の気密栓。2. The airtight stopper according to claim 1, wherein the curvature of the inner surface plate is smaller than the curvature of the inner end surface of the elastic stopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7447992U JPH071357U (en) | 1992-10-26 | 1992-10-26 | Airtight stopper for perforation hole in pipe wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7447992U JPH071357U (en) | 1992-10-26 | 1992-10-26 | Airtight stopper for perforation hole in pipe wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH071357U true JPH071357U (en) | 1995-01-10 |
Family
ID=13548453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7447992U Pending JPH071357U (en) | 1992-10-26 | 1992-10-26 | Airtight stopper for perforation hole in pipe wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH027515U (en) * | 1988-06-30 | 1990-01-18 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0346716A (en) * | 1989-07-14 | 1991-02-28 | Yamatake Honeywell Co Ltd | Switch with failure previewing function |
-
1992
- 1992-10-26 JP JP7447992U patent/JPH071357U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0346716A (en) * | 1989-07-14 | 1991-02-28 | Yamatake Honeywell Co Ltd | Switch with failure previewing function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH027515U (en) * | 1988-06-30 | 1990-01-18 |
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