JP3315281B2 - Universal joint - Google Patents
Universal jointInfo
- Publication number
- JP3315281B2 JP3315281B2 JP32109894A JP32109894A JP3315281B2 JP 3315281 B2 JP3315281 B2 JP 3315281B2 JP 32109894 A JP32109894 A JP 32109894A JP 32109894 A JP32109894 A JP 32109894A JP 3315281 B2 JP3315281 B2 JP 3315281B2
- Authority
- JP
- Japan
- Prior art keywords
- packing
- joint
- thermal expansion
- universal joint
- connection portion
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/053—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces held in place by bolts passing through flanges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/06—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces
- F16L27/073—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces one of the cooperating surfaces forming the sealing means
Description
【０００１】[0001]
【産業上の利用分野】本発明は、特にガス配管用に用い
て、通常状態ではシール性が良く、火災時においても大
きな漏れを発生しない接続部が揺動自在な自在継手に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint which is used particularly for gas pipes, has a good sealing property under normal conditions, and does not cause a large leak even in a fire.
【０００２】[0002]
【従来の技術】従来、実公平１−２３０２２号公報で開
示されたごとく、膨張黒鉛入りの熱膨張ゴムパッキンを
装着した管継手がある。このものは、火災時に膨張黒鉛
入りのゴムパッキンが膨張して管継手内に充満し、配管
の漏れを低減するものである。また実開平１−１８００
８９号公報で、凹状球面と凸状球面を持つ部材間にシー
ルパッキンを介して互いに揺動自在に押輪を用いて連結
した自在継手がある。2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 1-20222, there is a pipe joint equipped with a thermal expansion rubber packing containing expanded graphite. This is to reduce the leakage of the pipe when the rubber packing containing the expanded graphite expands and fills the pipe joint at the time of fire. In addition, actual opening flat 1-1800
No. 89, there is a universal joint in which members having a concave spherical surface and a convex spherical surface are connected to each other via a seal packing so as to be swingable with each other using a press ring.
【０００３】[0003]
【発明が解決しようとする課題】そこで耐火シール性を
備えた自在継手を得ようとすると、単に前者の膨張黒鉛
入りゴムパッキンを後者の自在継手に装着すれば得られ
ると考えられるが、本発明者等が種々試験を行った結
果、膨張黒鉛入りゴムパッキンを自在継手内に装着する
場所によって火災試験での漏れ量が大きく変わり、所定
の場所以外に装着したのでは何ら膨張黒鉛入りゴムパッ
キンの効果が得られないことが判明した。In order to obtain a universal joint having a fire-resistant seal, it is thought that it can be obtained simply by attaching the former expanded rubber-filled rubber packing to the latter universal joint. As a result of various tests performed by the persons and others, the amount of leakage in the fire test greatly depends on the place where the rubber packing containing expanded graphite is installed in the universal joint. It turned out that no effect was obtained.
【０００４】例えば図２に示すごとく、熱膨張ゴムパッ
キン１をシールパッキン２の傍に並べて装着した場合、
火災時において連結部両側に装着してあるシールパッキ
ン２、３が消失し、熱膨張ゴムパッキン１が膨張する。
この熱膨張パッキン１はシールパッキン１の消失した場
所に膨張すると共に連結部の凸状球面部材４をシールパ
ッキン３側に押しやり、熱膨張ゴムパッキン１の収容空
間が大きく広がる。このため連結部内面４と凸状球面５
間を密封シール出来なくなり、熱膨張ゴムパッキン１に
よるシール効果が得られない問題がある。そこで本発明
は、熱膨張ゴムパッキンを所定の継手装着位置に設ける
ことによって火災時においても大きな漏れに至らず、通
常の使用状態で確実なシール性を発揮する揺動自在な自
在継手を提供するものである。For example, as shown in FIG. 2, when the thermal expansion rubber packing 1 is mounted side by side with the seal packing 2,
In the event of a fire, the seal packings 2 and 3 mounted on both sides of the connecting portion disappear, and the thermal expansion rubber packing 1 expands.
The thermal expansion packing 1 expands to the place where the seal packing 1 has disappeared, and at the same time, pushes the convex spherical member 4 of the connecting portion toward the seal packing 3 side, so that the accommodation space for the thermal expansion rubber packing 1 greatly expands. For this reason, the connecting portion inner surface 4 and the convex spherical surface 5
There is a problem that the sealing cannot be performed between the sealing members and the sealing effect by the thermal expansion rubber packing 1 cannot be obtained. Therefore, the present invention provides a swingable universal joint that does not cause a large leak even in the event of a fire by providing a thermal expansion rubber packing at a predetermined joint mounting position, and exhibits a reliable sealing property in a normal use state. Things.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨は、中央側
の端部内面に揺動連結部を設けた継手本体と、この揺動
連結部にシールパッキンを装着して嵌まり合う凸状球面
を有し、揺動連結部と揺動自在に連結された継手スリー
ブとからなる自在継手において、前記揺動連結部の連結
中央部内面に独立した凹溝を設け、この凹溝に膨張黒鉛
入りの熱膨張ゴムパッキンを装着し、前記揺動連結部に
装着したシールパッキンを揺動連結部に締結する押輪で
圧縮して前記継手本体と継手スリーブとを揺動自在に連
結したことを特徴とする自在継手である。SUMMARY OF THE INVENTION The gist of the present invention is to provide a joint body having a rocking connection on the inner surface at the center end, and a convex shape fitted with a seal packing mounted on the rocking connection. In a universal joint having a spherical surface and comprising a joint sleeve and a joint sleeve that is swingably connected, an independent concave groove is provided on an inner surface of a connection center portion of the rocking joint, and expanded graphite is formed in the concave groove. The joint body and the joint sleeve are swingably connected by mounting a heat-expanding rubber packing into the joint body and compressing the seal packing attached to the swing joint with a pressing ring fastened to the swing joint. It is a universal joint.
【０００６】[0006]
【作用】本発明は上記の構成の通りであって、膨張黒鉛
入りの熱膨張パッキンは継手本体の揺動連結部の連結中
央部に装着され、且つ揺動連結部の独立した凹溝内に装
着されている。また継手本体と継手スリーブとはシール
パッキンの圧縮によるシール状態で揺動自在に連結され
ている。従って例えば火災等の発生に際して、シールパ
ッキンが消失し熱膨張パッキンが膨張しても、連結中央
部に装着された熱膨張パッキンは継手スリーブの凸状球
面を互いに中心方向に押圧し、凸状球面が軸線方向シー
ルパッキンの消失側に押圧されて移動されることがな
い。また熱膨張パッキンは独立した凹溝内に装着してあ
るから、熱膨張パッキンの収容空間が広がらず、膨張し
た分は凸状球面とのシールに有効に働く。従って火災等
に際しても熱膨張パッキンの収容空間が変化しないの
で、熱膨張パッキンの熱膨張によって継手本体と継手ス
リーブ間の揺動連結部がシールされ、内部を流れる都市
ガス等の流体の漏れが防止される。The present invention is as described above, wherein the thermal expansion packing containing expanded graphite is mounted on the connection center of the swing connection portion of the joint body, and is provided in an independent groove of the swing connection portion. It is installed. The joint body and the joint sleeve are swingably connected in a sealed state by compression of the seal packing. Therefore, for example, in the event of a fire or the like, even if the seal packing disappears and the thermal expansion packing expands, the thermal expansion packing attached to the connection center presses the convex spherical surfaces of the joint sleeve toward each other in the center direction, and the convex spherical surface. Is not pressed and moved to the disappearing side of the axial seal packing. Further, since the thermal expansion packing is mounted in the independent groove, the accommodation space of the thermal expansion packing does not expand, and the expanded portion effectively works for sealing with the convex spherical surface. Therefore, the storage space of the thermal expansion packing does not change in the event of a fire, etc., and the thermal expansion of the thermal expansion packing seals the oscillating connection between the joint body and the joint sleeve, preventing leakage of fluid such as city gas flowing inside. Is done.
【０００７】[0007]
【実施例】以下本発明の実施例を図面を参照して説明す
る。図１は本発明の一実施例を示す自在継手の断面図で
ある。継手本体１０は端部に配管との接続用ねじ１１を
有し、中央側端部にフランジ部１２を有する。内面は継
手スリーブ２０の凸状球面２１を収容する揺動連結部と
なっており、シールパッキン３１を収容するパッキン収
容部１３とシールパッキン３２を収容するパッキン収容
部１４を有し、このパッキン収容部１３と１４との間に
独立した凹溝１５を設けてある。この凹溝１５は凸状球
面２１の中央部に位置し、揺動連結部の中央部に相当す
る。この凹溝１５には膨張黒鉛入りの熱膨張パッキン４
０を装着してある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a universal joint showing one embodiment of the present invention. The joint body 10 has a pipe connection screw 11 at an end and a flange 12 at a center end. The inner surface of the joint sleeve 20 serves as a swinging connecting portion for accommodating the convex spherical surface 21, and has a packing accommodating portion 13 for accommodating the seal packing 31 and a packing accommodating portion 14 for accommodating the seal packing 32. An independent groove 15 is provided between the parts 13 and 14. The concave groove 15 is located at the center of the convex spherical surface 21 and corresponds to the center of the swing connecting portion. The thermal expansion packing 4 containing expanded graphite is formed in the concave groove 15.
0 is attached.
【０００８】継手スリーブ２０は端部に配管との接続用
ねじ２２を有し、中央側端部に前記凸状球面２１を設け
て継手本体の揺動収容部内で揺動自在に収容されてい
る。押輪５０は小径側にパッキン押圧部５１を有したフ
ランジ状で、継手本体１０のフランジ部１２とボルト５
２で締結される。ボルト５２の締結によって押輪５０の
パッキン押圧部５１がシールパッキン３１を押圧し、シ
ールパッキン３１の押圧によって継手スリーブ２０の凸
状球面２１が奥側へ押されてシールパッキン３２を押圧
し、結局シールパッキン３１と３２が圧縮されて揺動収
容部内面と凸状球面２１の外面間をシールする。またこ
の状態で凸状球面２１が揺動収容部の中心に連結され
る。このため熱膨張パッキン４０は継手スリーブ２０の
揺動位置にかかわらず、常に凸状球面２１の中心軸上最
大径部に接している。The joint sleeve 20 has a screw 22 for connection to a pipe at an end thereof, and the convex spherical surface 21 is provided at a center end thereof, and is housed so as to be swingable in a swing housing portion of the joint body. . The press ring 50 has a flange shape having a packing pressing portion 51 on the small diameter side.
2 When the bolt 52 is fastened, the packing pressing portion 51 of the pressing wheel 50 presses the seal packing 31, and the pressing of the seal packing 31 presses the convex spherical surface 21 of the joint sleeve 20 to the back side to press the seal packing 32, and eventually the seal The packings 31 and 32 are compressed to seal between the inner surface of the swing housing portion and the outer surface of the convex spherical surface 21. In this state, the convex spherical surface 21 is connected to the center of the swing accommodation portion. For this reason, the thermal expansion packing 40 is always in contact with the largest diameter portion on the central axis of the convex spherical surface 21 irrespective of the swing position of the joint sleeve 20.
【０００９】通常継手スリーブ２０はシールパッキン３
１と３２の圧縮によるシール状態で継手本体１０に対し
て揺動自在に連結されている。火災時においてシールパ
ッキン３１と３２が消失しても、凹溝１５に装着した熱
膨張パッキン４０が膨張して継手スリーブ２０の凸状球
面２１の外面を埋めるので大きな漏れに至らない。また
熱膨張パッキン４０は凸状球面２１の中心軸上最大径部
を中心側に押圧するので、凸状球面２１が軸線上左右い
ずれかに移動して熱膨張パッキン４０の膨出空間が大き
くならず、熱膨張パッキン４０による耐火災性能が確保
される。Usually, the joint sleeve 20 is made of the seal packing 3.
The joints 1 and 32 are swingably connected to the joint body 10 in a sealed state by compression. Even if the seal packings 31 and 32 disappear in a fire, the thermal expansion packing 40 mounted in the concave groove 15 expands and fills the outer surface of the convex spherical surface 21 of the joint sleeve 20, so that no large leakage occurs. Further, since the thermal expansion packing 40 presses the largest diameter portion on the central axis of the convex spherical surface 21 toward the center, if the convex spherical surface 21 moves to the left or right on the axis and the swelling space of the thermal expansion packing 40 becomes large. Therefore, the fire resistance performance of the thermal expansion packing 40 is ensured.
【００１０】[0010]
【発明の効果】以上説明のごとく本発明は、火災等に際
しても熱膨張パッキンの収容空間が変化しないので、熱
膨張パッキンの熱膨張による継手本体と継手スリーブ間
の揺動連結部のシール性が維持され、継手内部を流れる
都市ガス等の流体の漏れを防止する。このため火災時の
二次災害等の問題が生じなく、安全性を確保した自在継
手である。As described above, according to the present invention, since the accommodation space of the thermal expansion packing does not change even in the event of a fire or the like, the sealing property of the swing connection between the joint body and the joint sleeve due to the thermal expansion of the thermal expansion packing is improved. It is maintained and prevents leakage of fluid such as city gas flowing inside the joint. For this reason, there is no problem such as a secondary disaster in the event of a fire, and the universal joint ensures safety.
【図１】 本発明の一実施例を説明する自在継手の断面
図である。FIG. 1 is a sectional view of a universal joint illustrating an embodiment of the present invention.
【図２】 従来の熱膨張パッキンを装着した自在継手を
示す断面図である。FIG. 2 is a sectional view showing a universal joint equipped with a conventional thermal expansion packing.
１０ 継手本体 １１ 接続ねじ １２ フランジ部 １３、１４ パ
ッキン収容部 １５ 溝部 ２０ 継手スリ
ーブ ２１ 凸状球面 ２２ 接続ねじ ３１、３２ シールパッキン ４０ 熱膨張パ
ッキン ５０ 押輪 ５１ パッキン
押圧部 ５２ ボルトDESCRIPTION OF SYMBOLS 10 Joint main body 11 Connection screw 12 Flange part 13, 14 Packing accommodation part 15 Groove part 20 Joint sleeve 21 Convex spherical surface 22 Connection screw 31, 32 Seal packing 40 Thermal expansion packing 50 Pressing ring 51 Packing pressing part 52 Bolt
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−200891（ＪＰ，Ａ) 実開 昭56−97684（ＪＰ，Ｕ) 実開 昭58−18179（ＪＰ，Ｕ) 実開 昭52−75920（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 27/04 F16L 27/06 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-200891 (JP, A) JP-A-56-97684 (JP, U) JP-A-58-18179 (JP, U) JP-A 52-2008 75920 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) F16L 27/04 F16L 27/06
Claims (1)
継手本体と、 この揺動連結部にシールパッキンを装着して嵌まり合う
凸状球面を有し、揺動連結部と揺動自在に連結された継
手スリーブとからなる自在継手において、 前記揺動連結部の連結中央部内面に独立した凹溝を設
け、この凹溝に膨張黒鉛入りの熱膨張ゴムパッキンを装
着し、前記揺動連結部に装着したシールパッキンを揺動
連結部に締結する押輪で圧縮して前記継手本体と継手ス
リーブとを揺動自在に連結したことを特徴とする自在継
手。1. A joint body having a swing connection portion provided on an inner surface of an end portion on a center side, and a convex spherical surface fitted and fitted with a seal packing on the swing connection portion. In a universal joint comprising a joint sleeve slidably connected, an independent concave groove is provided on an inner surface of a connection central portion of the oscillating connection portion, and a thermal expansion rubber packing containing expanded graphite is attached to the concave groove. A universal joint wherein the seal packing attached to the swing connection portion is compressed by a pressing wheel fastened to the swing connection portion, and the joint body and the joint sleeve are swingably connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32109894A JP3315281B2 (en) | 1994-12-26 | 1994-12-26 | Universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32109894A JP3315281B2 (en) | 1994-12-26 | 1994-12-26 | Universal joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08178150A JPH08178150A (en) | 1996-07-12 |
| JP3315281B2 true JP3315281B2 (en) | 2002-08-19 |
Family
ID=18128802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32109894A Expired - Fee Related JP3315281B2 (en) | 1994-12-26 | 1994-12-26 | Universal joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3315281B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985786A (en) * | 2019-12-23 | 2020-04-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Sphere connection compensation device for aircraft fuel system |
| CN114517836B (en) * | 2022-01-14 | 2024-04-12 | 玺智达精密电子(深圳)有限公司 | Composite water-swelling rubber ring |
-
1994
- 1994-12-26 JP JP32109894A patent/JP3315281B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08178150A (en) | 1996-07-12 |
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