JPS6155422A - Shock absorber - Google Patents
Shock absorberInfo
- Publication number
- JPS6155422A JPS6155422A JP17635884A JP17635884A JPS6155422A JP S6155422 A JPS6155422 A JP S6155422A JP 17635884 A JP17635884 A JP 17635884A JP 17635884 A JP17635884 A JP 17635884A JP S6155422 A JPS6155422 A JP S6155422A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- shock absorber
- axial direction
- support base
- outer tube
- 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
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
-
- 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
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
- F16L3/215—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction the movement being hydraulically or electrically controlled
- F16L3/217—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction the movement being hydraulically or electrically controlled hydraulically
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は配管等の被支持物を支持基礎部に対して常に所
定位置に保持する緩衝装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a shock absorbing device that always holds a supported object such as a pipe in a predetermined position relative to a support base.
一般に、原子力発電プラント等の各種プラントには、流
体送給用の種々の配管が設けられている。Generally, various types of plants such as nuclear power plants are provided with various types of piping for fluid delivery.
そして、これらの配管等を緩＊装置を用いて支持基礎部
に保持してプラントの安全運転を確保している。These pipes, etc. are then held on the supporting foundation using a loosening device to ensure safe operation of the plant.
この緩衝装置には、配管等の熱膨張や自重等を支承する
のみならず、地震やウォータハンマ等による急激な動き
に対しても配管等を安全に支承するという機能を備えて
いることが要求されている。This shock absorber is required to have the ability to not only support the thermal expansion and dead weight of the piping, etc., but also to safely support the piping, etc. against sudden movements caused by earthquakes, water hammer, etc. has been done.
すなわち、緩速移動については何ら緩衝作用を行なわず
、急速移動についてのみ緩衝作用を行なう必要がある。That is, it is necessary to perform no buffering action for slow movement, but only for rapid movement.
第３図はこの種の従来の緩衝装置を示す。FIG. 3 shows a conventional shock absorber of this type.
この緩衝装置１は、配管２を支持基礎部３に対して支持
するように形成されている。すなわち、作動液体（例え
ば、作動油）５が充填されているシリンダ４内にピスト
ン６を内装し、ピストンロッド７をブラケット８を介し
て支持基礎部３に連結し、前記シリンダ４を配管２に巻
着したパイプクランプ９に連結して形成されている。そ
して、ピストン６は外嵌ルたシール材１０をもってシリ
ンダ４の内周面ど軸方向摺動自在にかつ液密状にして内
装されており、その中間部には分割した左右のシリンダ
室４ａ、４ｂを連通する軸方向の小孔１１が穿設されて
いる。This shock absorber 1 is formed to support a pipe 2 with respect to a support base 3. That is, a piston 6 is installed inside a cylinder 4 filled with a working fluid (for example, working oil) 5, a piston rod 7 is connected to the support base 3 via a bracket 8, and the cylinder 4 is connected to the piping 2. It is connected to the wrapped pipe clamp 9. The piston 6 is housed inside the cylinder 4 with a sealing material 10 fitted on the outside so that it can freely slide in the axial direction on the inner circumferential surface of the cylinder 4 and in a liquid-tight manner. A small hole 11 in the axial direction is bored through which the 4b communicates with each other.
この緩衝装置１は、配管２が熱膨張により支持基礎部３
に対して緩速で相対移動する場合には、ピストン６、シ
ール材１０により分割されている各シリンダ室４．ａ、
４ｂ内の作動液体５が小孔１１を通して円滑に移動する
ので、配管２の熱膨張を許容して支持する。一方、地震
等にｊ；り配管２が支持基礎部３に対して急速に相対移
動する場合には、ピストン６およびシール材１０がシリ
ンダ４内を急速移動する時に、小孔１１が各シリンダ室
４ａ、４ｂ間の作動液体５の移動に対してダンパ作用を
発揮し、配管２の急速な相対移動を減衰させる。これに
より緩衝装置１は配管２を地震時においても所定位置に
保持することができる。In this shock absorber 1, the piping 2 is caused by thermal expansion at the support base 3.
When moving relative to each other at a slow speed, each cylinder chamber 4. is divided by the piston 6 and the sealing material 10. a,
Since the working liquid 5 in 4b moves smoothly through the small holes 11, the piping 2 is supported while allowing thermal expansion. On the other hand, if the piping 2 rapidly moves relative to the support foundation 3 due to an earthquake, etc., when the piston 6 and sealing material 10 rapidly move inside the cylinder 4, the small holes 11 will be inserted into each cylinder chamber. It exerts a damper effect on the movement of the working liquid 5 between 4a and 4b, and damps the rapid relative movement of the pipe 2. Thereby, the shock absorber 1 can hold the pipe 2 in a predetermined position even during an earthquake.
ところが、この従来の緩衝装置においては液密性確保の
ためにシール材１０を用いているので、長期間使用する
とシール材１０が劣化して液密性が悪くなり、ｉｔ！ｌ
震時における初期の減衰性能を維持することが不可能と
なり、そのシール材１０の交換を余儀なくされている。However, since this conventional shock absorber uses a sealing material 10 to ensure liquid tightness, when used for a long period of time, the sealing material 10 deteriorates and the liquid tightness deteriorates, causing IT! l
It becomes impossible to maintain the initial damping performance during an earthquake, and the sealing material 10 has to be replaced.
そして、シール材１０の劣化はシリンダ４の外部からは
観察することができないので、緩衝装置１自身を頻繁に
分解し、点検する必要がある。また、このシール材１０
の交換および点検を行なうには、シリンダ４内から作動
液体５を完全に抜き取り、シリンダ４外にピストン６と
共に取り出さなければならず、この時に作動液体５が漏
洩するおそれがある。また、この交換、点検作業は、原
子炉建屋内で行なわなければならないので、作業員が被
曝してしまうおそれがあった。Since the deterioration of the sealing material 10 cannot be observed from the outside of the cylinder 4, it is necessary to frequently disassemble and inspect the shock absorber 1 itself. In addition, this sealing material 10
In order to replace and inspect the piston 6, it is necessary to completely remove the working fluid 5 from the cylinder 4 and take it out of the cylinder 4 together with the piston 6. At this time, there is a risk that the working fluid 5 may leak. Furthermore, since this replacement and inspection work had to be done inside the reactor building, there was a risk that the workers would be exposed to radiation.
また、従来はダンパ作用を行なわせる小孔１１− ３
＝
に代えて、例えば、特公昭１６−１３４６号公報（特許
第１４． ／１．６２２号明細書）に示すようにオリフ
ィス部内壁面に螺旋突條や凹凸溝を形成したり、実公昭
７８−１７８２１号公報に示すようにピストンの外周面
に環状溝や軸方向溝を形成したりしているが、構造が複
雑であり、また、そのダンパ作用は作動液体の移動流路
を絞ることによって発揮させるものであった。また、実
公昭３５−１４８５７号公報には、作動液体を中心部か
ら排出する導出孔を有する突起に対してシリンダを進退
さ−Ｕてダンパ作用を行なう装置が示されているが、構
成が複雑であった。In addition, conventionally, a small hole 11-3 for performing a damper action is used.
= Instead of, for example, spiral protrusions or uneven grooves may be formed on the inner wall surface of the orifice portion as shown in Japanese Patent Publication No. 16-1346 (Patent No. 14./1.622), or As shown in Japanese Patent No. 17821, an annular groove or an axial groove is formed on the outer circumferential surface of the piston, but the structure is complicated and the damper effect is achieved by narrowing the movement flow path of the working fluid. It was something to do. Furthermore, Japanese Utility Model Publication No. 35-14857 discloses a device that performs a damper action by moving a cylinder back and forth against a protrusion that has an outlet hole for discharging working fluid from the center, but the structure is complicated. Met.
本発明はこれらの点に鑑みてなされたものであり、経年
変化にＪ：つで劣化する部分がなく、長期に亘って良好
な減衰作用を行なうことができ、しかも分解、点検等の
頻度を極めて少なくすることのできる緩衝装置を提供す
ることを目的とする。The present invention has been made in view of these points, and has no parts that deteriorate over time, can provide good damping effect over a long period of time, and can reduce the frequency of disassembly and inspection. It is an object of the present invention to provide a shock absorbing device that can be extremely reduced in size.
本発明の緩衝装置は、作動液体が充填されているシリン
ダと、軸方向相対移動自在にして前記シリンダ内に内装
されるとともに支持基礎部と被支持物との間に展張され
る相互に周方向微小間隙を介して遊嵌されている内外筒
であって、前記軸方向相対移動速度が大きい場合に前記
周方向微小間隙内に形成される前記作動液体の液膜の粘
性摩耗により緩衝力を作用させる内外筒とにより形成し
たことを特徴とする。The shock absorber of the present invention includes a cylinder filled with a working liquid, and a mutually circumferentially movable cylinder which is internally disposed within the cylinder and extends between a support base and a supported object. The inner and outer cylinders are loosely fitted through a minute gap, and when the axial relative movement speed is high, a buffering force is exerted by the viscous wear of the working liquid film formed in the circumferential minute gap. It is characterized by being formed with an inner and outer cylinder.
以下、本発明の実施例を第１図および第２図について説
明する。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.
第１図および第２図は本発明の一実施例を示す。1 and 2 show one embodiment of the invention.
本実施例の緩衝装置２１は従来と同様に被支持物として
の配管２と支持基礎部３との間に展張されており、その
シリンダ２２内には相互に軸方向相対移動自在にして内
筒２３と外筒２４とが設けられている。この内筒２３は
シリンダ２２に固着されており、パイプクランプ９を介
して配管２に連結されている。また、外筒２４はシリン
ダ２２を貫通するロッド２５およびブラケット８を介し
て支持基礎部３に連結されている。そして、内筒２３と
外筒２４とは相互に周方向微小間隙２６を介して遊嵌さ
れており、この周方向微小間隙２６はシリンダ２２内に
充填されている作動液体２７の粘性摩擦にＪ、す、内筒
２３と外筒２４とが急速に軸方向相対移動づ′る場合に
ダンパ作用を発揮し、緩速に軸方向相対移動づ°る場合
にはダンパ作用を発揮しない大きざに形成されている。The shock absorber 21 of this embodiment is extended between the pipe 2 as a supported object and the support base 3 as in the conventional case, and an inner cylinder 22 is provided in the cylinder 22 so as to be able to move relative to each other in the axial direction. 23 and an outer cylinder 24 are provided. This inner cylinder 23 is fixed to the cylinder 22 and connected to the pipe 2 via a pipe clamp 9. Further, the outer cylinder 24 is connected to the supporting base part 3 via a rod 25 passing through the cylinder 22 and a bracket 8. The inner cylinder 23 and the outer cylinder 24 are loosely fitted into each other through a circumferential minute gap 26, and this circumferential minute gap 26 is created by the viscous friction of the working fluid 27 filled in the cylinder 22. When the inner cylinder 23 and the outer cylinder 24 move rapidly relative to each other in the axial direction, a damper effect is exerted, and when the inner cylinder 23 and outer cylinder 24 move slowly relative to each other in the axial direction, the damper effect is not exerted. It is formed.
次に、本実施例の作用を説明する。Next, the operation of this embodiment will be explained.
周方向微小間隙２６内の作動液体２７の液膜は、内筒２
３と外筒２４とが軸方向に相対移動する場合には、内筒
２３の外周面と外筒２４の内周面とに粘性摩擦力を作用
さゼる。この時、その軸方向相対移動が、配管２の熱膨
張に基づくもので緩速な場合には、前記粘性Ｉ！１１力
は極めて小ざいので、内筒２３と外筒２４とは何の抵抗
もなく円滑に相対移動し、配管２を良好に支持する。一
方、その１１１１方向相対移動が、地震等に基づくもの
で急速な場合には、前記粘性摩擦力が極めて大きくなり
、その相対移動を阻止η′る抵抗力として作用し、この
ダンパ作用により配管２は支持基礎部３に対して地震時
においても所定位置に保持される。Ｊ：って、配管２等
が異常振動をして破断することなども有効に防止され、
安全＋！１が高いものとなる。The liquid film of the working liquid 27 in the circumferential minute gap 26 is
3 and the outer cylinder 24 move relative to each other in the axial direction, a viscous frictional force is applied to the outer peripheral surface of the inner cylinder 23 and the inner peripheral surface of the outer cylinder 24. At this time, if the relative movement in the axial direction is based on the thermal expansion of the pipe 2 and is slow, the viscosity I! Since the force 11 is extremely small, the inner tube 23 and the outer tube 24 smoothly move relative to each other without any resistance, supporting the pipe 2 well. On the other hand, if the relative movement in the 1111 direction is rapid due to an earthquake or the like, the viscous frictional force becomes extremely large and acts as a resistance force that blocks the relative movement, and this damper action causes the piping to is maintained in a predetermined position relative to the support foundation 3 even during an earthquake. J: So, it effectively prevents abnormal vibration and breakage of piping 2, etc.
Safety+! 1 is higher.
このように本発明の緩衝装置は、内外筒を周方向微小間
隙を介して軸方向相対移動自在に遊嵌させ、その周方向
微小間隙内における作動液体の液膜による粘性摩擦によ
ってダンパ作用を行なわせるものであるから、経年変化
により劣化する構成部材がなく、長期に亘って常に良好
な減衰作用を発揮して、配管等の被支持物を所定位置に
保持することができ、しかも、分解、点検作業の頻度を
極めて少なくすることができ、作業員の被曝低減を図る
ことができる等の効果を奏する。As described above, in the shock absorbing device of the present invention, the inner and outer cylinders are loosely fitted through a circumferential minute gap so as to be relatively movable in the axial direction, and a damper action is performed by the viscous friction caused by the working liquid film within the circumferential minute gap. Because there are no structural parts that deteriorate due to aging, it can always exert a good damping effect over a long period of time, and can hold supported objects such as piping in a predetermined position. It is possible to extremely reduce the frequency of inspection work, and there are effects such as being able to reduce the radiation exposure of workers.
第１図は本発明の緩衝装置の一実施例を示す縦断側面図
、Ｍ２図は第１図のＵ−４線に沿った断面図、第３図は
従来の緩衝装置を示す縦断側面図＝ ７ −
である。
２・・・配管（被支持物）、３・・・支持基礎部、２１
・・・緩衝装置、２３・・・内筒、２４・・・外筒、２
５・・・ロッド、２６・・・周方向微小間隙、２７・・
・作動液体。Fig. 1 is a longitudinal side view showing one embodiment of the shock absorbing device of the present invention, Fig. M2 is a cross-sectional view taken along line U-4 in Fig. 1, and Fig. 3 is a longitudinal side view showing a conventional shock absorbing device. 7-. 2... Piping (supported object), 3... Support foundation, 21
...Buffer device, 23...Inner cylinder, 24...Outer cylinder, 2
5... Rod, 26... Circumferential minute gap, 27...
- Working fluid.
Claims (1)
移動自在にして前記シリンダ内に内装されるとともに支
持基礎部と被支持物との間に展張される相互に周方向微
小間隔を介して遊嵌されている内外筒であって、前記軸
方向相対移動速度が大きい場合に前記周方向微小間隙内
に形成される前記作動液体の液膜の粘性摩擦により緩衝
力を作用させる内外筒とを有する緩衝装置。 ２、内筒はシリンダ内面に固着されており、外筒はその
シリンダ内を移動自在にして前記内筒に遊嵌されており
、前記内筒は前記シリンダを介して被支持物に連結され
ており、前記外筒は前記シリンダを貫通するロッドを介
して支持基礎部に連結されていることを特徴とする特許
請求の範囲第１項記載の緩衝装置。[Scope of Claims] 1. A cylinder filled with a working liquid, and a mutually circumferential cylinder that is movable relative to each other in the axial direction and is installed inside the cylinder and extends between the support base and the supported object. The inner and outer cylinders are loosely fitted with a small gap in the direction, and when the relative movement speed in the axial direction is large, the buffering force is exerted by the viscous friction of the liquid film of the working liquid that is formed in the small gap in the circumferential direction. A shock absorber having an inner and outer cylinder to be actuated. 2. The inner cylinder is fixed to the inner surface of the cylinder, the outer cylinder is movable within the cylinder and loosely fitted to the inner cylinder, and the inner cylinder is connected to the object to be supported via the cylinder. 2. The shock absorbing device according to claim 1, wherein the outer cylinder is connected to a support base via a rod passing through the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17635884A JPS6155422A (en) | 1984-08-24 | 1984-08-24 | Shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17635884A JPS6155422A (en) | 1984-08-24 | 1984-08-24 | Shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6155422A true JPS6155422A (en) | 1986-03-19 |
Family
ID=16012210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17635884A Pending JPS6155422A (en) | 1984-08-24 | 1984-08-24 | Shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6155422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63217078A (en) * | 1987-03-04 | 1988-09-09 | 株式会社 青木建設 | Air dome antiseptic livestock barn |
| US7404548B2 (en) * | 2005-08-10 | 2008-07-29 | Illinois Tool Works Inc. | Dampening clip assembly |
-
1984
- 1984-08-24 JP JP17635884A patent/JPS6155422A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63217078A (en) * | 1987-03-04 | 1988-09-09 | 株式会社 青木建設 | Air dome antiseptic livestock barn |
| US7404548B2 (en) * | 2005-08-10 | 2008-07-29 | Illinois Tool Works Inc. | Dampening clip assembly |
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