JPH02195094A - Seal material for pipe joint - Google Patents
Seal material for pipe jointInfo
- Publication number
- JPH02195094A JPH02195094A JP1591389A JP1591389A JPH02195094A JP H02195094 A JPH02195094 A JP H02195094A JP 1591389 A JP1591389 A JP 1591389A JP 1591389 A JP1591389 A JP 1591389A JP H02195094 A JPH02195094 A JP H02195094A
- Authority
- JP
- Japan
- Prior art keywords
- sealing material
- fluid
- elastic body
- rubber
- seal material
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 239000005060 rubber Substances 0.000 claims abstract description 22
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 239000003566 sealing material Substances 0.000 claims description 38
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000009969 flowable effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 13
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 5
- 229920005549 butyl rubber Polymers 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 3
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- 229920002379 silicone rubber Polymers 0.000 abstract description 2
- 239000004945 silicone rubber Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- 239000005077 polysulfide Substances 0.000 description 2
- 150000008117 polysulfides Polymers 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Joints With Pressure Members (AREA)
- Gasket Seals (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は崩脂ライニングされたパツキン型継手、殊に
メカニカル管継手と、これに接続する管体とのシール工
法に使用される管継手用シール材に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to a packing-type joint with a grease-absorbing lining, particularly for a pipe joint used in a sealing method between a mechanical pipe joint and a pipe connected thereto. This relates to sealing materials.
〈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或は防蝕は、この部分の
外側をテープでスパイラル状に巻き付けたり、熱収縮性
チューブで被覆して加熱収縮させる方法や、接続部に螺
合したナツトによりゴムバッキングまたは0リングを締
め付ける等の方法が採用されていた。<Prior art> Waterproofing or corrosion protection of the connection between a pipe that transports fluids such as gas or liquid and a joint pipe that connects the pipes can be achieved by wrapping the outside of this part in a spiral shape with tape. Methods such as covering the connector with a heat-shrinkable tube and shrinking it by heating, or tightening a rubber backing or an O-ring with a nut screwed onto the connecting portion have been adopted.
〈発明が解決しようとする課題〉
しかしながら最近の管体は、防蝕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(、
継手もメカニカル継手が多(使用され、その防蝕方法と
して従来のテープ巻き付けや熱収縮チューブの被覆が行
なわれているが、これらの被覆では施工性が悪(、満足
な結果が得られていないのが現状である。<Problem to be solved by the invention> However, many recent pipes have a lining layer made of synthetic resin etc. formed on the surface of the steel pipe for the purpose of corrosion prevention.
Mechanical joints are often used for joints, and conventional methods of protecting against corrosion include wrapping them with tape or covering them with heat-shrinkable tubes, but these coverings have poor workability (and have not yielded satisfactory results). is the current situation.
一方、樹脂ライニングされたパツキン型継手と管体との
水密方法として、管継手内のパツキンでシールする工法
があるが、これも曲げや、引張り時の水密性が不充分で
ある等の問題があった。On the other hand, as a watertight method for sealing resin-lined gasket-type joints and the pipe body, there is a method of sealing the pipe body with gaskets inside the pipe joint, but this method also has problems such as bending and insufficient watertightness during tension. there were.
一方、これらの問題点を解決するために、加圧により変
形する中空の環状成形体の中に加圧により流出する半流
動性のシール材を充填し、管継手に螺合する締付は環に
より、前記成形体を加圧変形させてシール材料を押し出
し、締付は環と管体との間隙を閉塞密閉する方法が最近
提案されている。しかしこの方法においても、間隙への
シール材の均一な流入がむづかしく、またしばしば環状
成形体の変形によるシール不良が発生し満足するもので
はなかった。On the other hand, in order to solve these problems, a semi-fluid sealing material that flows out under pressure is filled into a hollow annular molded body that deforms under pressure. Recently, a method has been proposed in which the molded body is deformed under pressure to extrude the sealing material, and the gap between the ring and the tube is closed and sealed by tightening. However, even with this method, it is difficult to uniformly flow the sealing material into the gap, and sealing failures often occur due to deformation of the annular molded body, so that it is not satisfactory.
〈課題を解決するための手段〉
この発明は、上記の問題点を解決するべく検討の結果な
されたものである。即ち、この発明は加圧により変形す
る可撓性ゴムまたはプラスチック材料からなる環状成形
体の周縁中空部にシール材を充填してなる管継手用シー
ル材であって、該成形体の閉口側中空部に実質的に非流
動性のゴム弾性体を、次いでその開口部側に半流動性シ
ール材を充填してなる複層構造の管継手用シール材を提
供するものであり、この管継手用シール材を用いること
によって、管継手に螺合する締付は環により前記成形体
を加圧変形させてシール材料を押し出し、締付は環と管
体との間隙を閉塞密閉することにより、環状成形体の変
形もなく良好なシール効果が得られることを見出したも
のである。<Means for Solving the Problems> The present invention has been made as a result of studies to solve the above problems. That is, the present invention provides a sealing material for a pipe joint, which is formed by filling a peripheral hollow portion of an annular molded body made of a flexible rubber or plastic material that deforms under pressure with a sealing material, the hollow portion on the closed side of the molded body being filled with a sealing material. The present invention provides a sealing material for a pipe fitting having a multi-layer structure in which a substantially non-flowing rubber elastic body is filled in the opening side of the rubber elastic body, and a semi-fluid sealing material is then filled in the opening side of the sealing material. By using a sealing material, tightening to screw into the pipe joint pressurizes and deforms the molded body with the ring to push out the sealing material, and tightening is performed by closing and sealing the gap between the ring and the pipe body. It has been discovered that a good sealing effect can be obtained without deformation of the molded body.
く作用〉
この発明の管継手用シール材は、第1図に断面図として
示すように環状の成形体Bの周縁中空部に充填するシー
ル材5として、該中空部の閉口側中空部に実質的に非流
動性のゴム弾性体8を、次いで開口部7側の中空部に半
流動性のシール材6を用いた複層構造からなるものであ
る。Function> The sealing material for a pipe joint of the present invention is used as a sealing material 5 to be filled in a hollow portion at the periphery of an annular molded body B, as shown in a cross-sectional view in FIG. It has a multilayer structure using a semi-fluid rubber elastic body 8 and a semi-fluid sealing material 6 in the hollow portion on the opening 7 side.
この発明で環状成形体Bの閉口部側中空部に充填する実
質的に非流動性のゴム弾性体8は、その圧縮回復率が5
0%以上、好ましくは65%以上を示すものがよい。こ
れ以下では万一環状成形体が変形した場合それを修復す
る能力に欠は好ましくないためである。In this invention, the substantially non-fluid rubber elastic body 8 filled in the hollow part on the closed side of the annular molded body B has a compression recovery rate of 5.
Those exhibiting 0% or more, preferably 65% or more are good. This is because if it is less than this, the ability to repair the deformation of the circular molded product is not desirable.
更に、このゴム弾性体8は粘着性を有しているほうがシ
ール性に優れる。その理由は成形体と弾性体との間の密
着性が優れるためと考えられる。Furthermore, the rubber elastic body 8 having adhesive properties has better sealing properties. The reason for this is thought to be that the adhesion between the molded body and the elastic body is excellent.
環状成形体Bの中空部へのゴム弾性体8と半流動性シー
ル材6との充填比率は体積比で1:4〜4:1の範囲に
あるのが好ましい。この範囲以外では良好なシール性が
得られない。The filling ratio of the rubber elastic body 8 and the semi-fluid sealing material 6 into the hollow portion of the annular molded body B is preferably in the range of 1:4 to 4:1 in terms of volume ratio. Good sealing performance cannot be obtained outside this range.
この発明に用いられる非流動性のゴム弾性体8としては
ウレタン、アクリル、EPT(エチレンプロピレンター
ポリマー)、NBRにトリル−ブタジェンゴム)、シリ
コーンなど公知の材料が用いられる。しかしながら、圧
縮回復率、粘着性などを考えるとウレタンが最も好まし
い。しかし、非粘着性弾性体の表面に粘着性ポリマーを
コートしたものでも同様の効果が得られるので大部分の
弾性体が使用される。また弾性体の弾性率を適当な範囲
にコントロールするためにポリマーを独立発泡させるこ
とも有力な手段である。As the non-fluid rubber elastic body 8 used in this invention, known materials such as urethane, acrylic, EPT (ethylene propylene terpolymer), NBR (tolyl-butadiene rubber), and silicone are used. However, urethane is most preferable in terms of compression recovery rate, adhesiveness, etc. However, the same effect can be obtained even if the surface of a non-tacky elastic body is coated with a sticky polymer, so most elastic bodies are used. In addition, in order to control the elastic modulus of the elastic body within an appropriate range, it is also an effective means to cause the polymer to foam independently.
次に、この発明で用いる半流動性のシール材6としては
、20℃における見掛は粘度が10”〜106ボイズの
ものが好ましい。このようなシール材としてはブチルゴ
ム系、シリコーンゴム系、ウレタン系、ポリサルファイ
ド系、EPT系など公知のものが使用される。Next, the semi-fluid sealing material 6 used in the present invention preferably has an apparent viscosity of 10'' to 106 voids at 20°C.Such sealing materials include butyl rubber, silicone rubber, and urethane rubber. Known materials such as polysulfide, polysulfide, and EPT are used.
〈実施例〉 以下、実施例によりこの発明の詳細な説明する。<Example> Hereinafter, this invention will be explained in detail with reference to Examples.
実施例1
第1図の構造を有する環状成形体の閉口側中空部に圧縮
回復率が75%の粘着性を有するウレタン系弾性体を挿
入する。次にその上の開口部側に見掛は粘度が3 X
10’ボイスのブチルゴム系半流動性シール材を注入す
る。弾性体とシール材の比率は1:1とした。Example 1 A urethane-based elastic body with adhesiveness and a compression recovery rate of 75% was inserted into the hollow part on the closed side of an annular molded body having the structure shown in FIG. Next, on the opening side above it, the apparent viscosity is 3
Inject a 10' voice butyl rubber semi-fluid sealant. The ratio of the elastic body to the sealing material was 1:1.
かくして中空部にウレタン系弾性体とブチルゴム系半流
動性シール材を充填した環状成形体を第2図に示すよう
に該成形体内の充填シール材の開口部7が締付は環りの
側となるように外挿する。As shown in FIG. 2, the annular molded body whose hollow part is filled with the urethane elastic material and the butyl rubber semi-fluid sealing material is tightened so that the opening 7 of the filled sealing material in the molded body is tightened on the side of the ring. Extrapolate so that
続いて、はぼ馬蹄形を有し、内周面に複数個の係合突起
を有するロックリング9、硬質ゴムまたはプラスチック
からなる押さえリング10およびゴム等からなる断面は
ぼ台形状の環状パツキン11をそれぞれ管体Cに外挿す
る。Next, a lock ring 9 having a horseshoe shape and having a plurality of engagement protrusions on its inner peripheral surface, a holding ring 10 made of hard rubber or plastic, and an annular packing 11 made of rubber or the like and having a trapezoidal cross section are attached. Extrapolate to tube C, respectively.
一方、管継手Aは環状パツキン11を抱持する拡径部1
2を具えると共に外周部分には、締付は環りの内ねじ3
に螺合する外ねじ13が刻設されている。On the other hand, the pipe joint A has an enlarged diameter portion 1 that holds the annular packing 11.
2, and the outer circumferential part is tightened with an internal thread 3 of the ring.
An external thread 13 is provided which is screwed into the external thread 13.
このように構成されてなる管継手Aには、前記の如く締
付は環D、環状の成形体B、ロックリング9、押えリン
グ10及び環状バッキング11等が管体Cに外挿され第
2図の如(管継手Aに挿入されるのである。As described above, the pipe joint A configured in this manner includes a tightening ring D, an annular molded body B, a lock ring 9, a retaining ring 10, an annular backing 11, etc., which are inserted into the pipe body C and a second As shown in the figure (it is inserted into pipe joint A).
次に第3図に示す如(、締付は環りと、管継手Aとをね
じ結合させることにより、環状パツキン11は管継手A
の拡径部12内に正大密嵌されて管体Cを流れる流体へ
のシール効果が得られると共に、馬蹄形のロックリング
9は締付は環りの締付けによりほぼ円形に変形して係合
突起が管体Cのライニング層に食い込んで管体Cを確実
に固定するものである。Next, as shown in FIG.
The horseshoe-shaped lock ring 9 is tightly fitted into the enlarged diameter portion 12 of the tube body C to obtain a sealing effect against the fluid flowing through the tube body C, and the horseshoe-shaped lock ring 9 is deformed into a substantially circular shape by tightening the ring to form an engaging protrusion. This is what bites into the lining layer of the tubular body C and securely fixes the tubular body C.
更に、締付は環りの順次締付けにより環状の成形体Bは
締付は環りの拡径部2内の傾斜面1で均一に押圧されて
変形し、第3図に示すように周縁中空部に充填したシー
ル材料5を開口部7から所要量押し出し、環りと管体C
との間隙内を充填して上記間隙を閉鎖密閉し、ロックリ
ング9の腐食等を防止するものである。Furthermore, as the rings are sequentially tightened, the annular molded body B is uniformly pressed and deformed by the inclined surface 1 in the enlarged diameter part 2 of the ring, and as shown in FIG. Push out the required amount of sealing material 5 filled in the part from the opening part 7, and remove the ring and the pipe body C.
This fills the gap between the lock ring 9 and the lock ring 9 to close and seal the gap to prevent corrosion of the lock ring 9 and the like.
このようにして、この発明の管継手用シール材を用いて
管体と管継手をシールしたものは良好な密閉性が得られ
優れた水密性を示した。In this way, the pipe body and the pipe joint were sealed using the sealing material for pipe joints of the present invention, and good sealing performance was obtained, showing excellent watertightness.
実施例2
実施例1と同様の環状成形体に粘着性のある圧縮回復率
が80%のアクリル系弾性体を充填し、つぎにEPT系
半流動性シール材を充填した。その比率はl:3と3:
1の2種類とした。このシール材を用いて実施例1と同
様の方法で管の継手をシールしたものはいづれも良好な
水密性を示した。Example 2 The same annular molded body as in Example 1 was filled with a sticky acrylic elastic material having a compression recovery rate of 80%, and then filled with an EPT semi-fluid sealing material. The ratio is l:3 and 3:
There are two types: 1. All pipe joints sealed with this sealing material in the same manner as in Example 1 exhibited good watertightness.
比較例1
実施例1と同様のもので弾性体を使用せずに、すべて半
流動性シール材で充填したものでは十分なシール性は得
られず、水漏れが起こった。Comparative Example 1 A product similar to Example 1, but filled entirely with a semi-fluid sealing material without using an elastic body, could not provide sufficient sealing performance and water leaked.
なお、この発明で用いる非流動性ゴム弾性体は、50%
以上の圧縮回復率を有するものであるが、この圧縮回復
率は10mm厚の弾性体試料を50%圧縮し50℃で7
2時間放置後、試料を取り出し圧縮力を取り除き20℃
×65%RH雰囲気中に30分放置したのち、次式
圧縮テスト後の厚さ(mm)710mm X 100(
%)=圧縮回復率
により求めたものである。Note that the non-flowable rubber elastic body used in this invention has a content of 50%
This compression recovery rate is as follows when compressing a 10 mm thick elastic sample by 50% at 50°C.
After leaving for 2 hours, take out the sample and remove the compressive force at 20°C.
After leaving it in an atmosphere of ×65% RH for 30 minutes, the thickness (mm) after the following formula compression test was 710 mm × 100 (
%)=calculation recovery rate.
第1図は個の発明のシール材の構造を示す縦断面図、第
2図および第3図はこの発明のシール材を用いた管継手
のシール状態を示す縦断面図である。
B・・・環状成形体 5・・・シール材
6・・・半流動性シール材 7・・・開口部8
・・・非流動性ゴム弾性体FIG. 1 is a longitudinal sectional view showing the structure of the sealing material of the invention, and FIGS. 2 and 3 are longitudinal sectional views showing the sealed state of a pipe joint using the sealing material of the invention. B... Annular molded body 5... Sealing material 6... Semi-fluid sealing material 7... Opening 8
...Non-flowable rubber elastic body
Claims (4)
ク材料からなる環状成形体の周縁中空部にシール材を充
填してなる管継手用シール材であって、前記成形体の閉
口側中空部に実質的に非流動性のゴム弾性体を、次いで
その開口部側に半流動性シール材を充填してなる複層構
造の管継手用シール材。(1) A sealing material for a pipe joint, which is formed by filling a peripheral hollow part of an annular molded body made of a flexible rubber or plastic material that deforms under pressure with a sealing material, the sealing material being filled in the hollow part on the closing side of the molded body. A sealing material for pipe fittings having a multi-layer structure made of a substantially non-fluid rubber elastic body and then filling the opening side with a semi-fluid sealing material.
ある請求項(1)記載の管継手用シール材。(2) The sealing material for pipe fittings according to claim (1), wherein the non-flowable rubber elastic body has a compression recovery rate of 50% or more.
)または(2)記載の管継手用シール材。(3) Claim (1) in which the non-flowable rubber elastic body has adhesive properties.
) or the sealing material for pipe joints described in (2).
比率が体積比で1:4〜4:1の範囲である請求項(1
)記載の管継手用シール材。(4) Claim (1) wherein the filling ratio of the non-fluid rubber elastic body and the semi-fluid sealing material is in the range of 1:4 to 4:1 by volume.
) Seal material for pipe fittings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1591389A JPH02195094A (en) | 1989-01-24 | 1989-01-24 | Seal material for pipe joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1591389A JPH02195094A (en) | 1989-01-24 | 1989-01-24 | Seal material for pipe joint |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02195094A true JPH02195094A (en) | 1990-08-01 |
Family
ID=11902021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1591389A Pending JPH02195094A (en) | 1989-01-24 | 1989-01-24 | Seal material for pipe joint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02195094A (en) |
-
1989
- 1989-01-24 JP JP1591389A patent/JPH02195094A/en active Pending
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