FR2654182A1 - Shock-absorber for horizontal pipework elements which can be positioned freely - Google Patents

Shock-absorber for horizontal pipework elements which can be positioned freely Download PDF

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Publication number
FR2654182A1
FR2654182A1 FR8914505A FR8914505A FR2654182A1 FR 2654182 A1 FR2654182 A1 FR 2654182A1 FR 8914505 A FR8914505 A FR 8914505A FR 8914505 A FR8914505 A FR 8914505A FR 2654182 A1 FR2654182 A1 FR 2654182A1
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FR
France
Prior art keywords
pipe
plate
cushions
shock
shock absorber
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.)
Granted
Application number
FR8914505A
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French (fr)
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FR2654182B1 (en
Inventor
Bourcier Pierre
Pauchet Arnaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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Filing date
Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to FR8914505A priority Critical patent/FR2654182B1/en
Publication of FR2654182A1 publication Critical patent/FR2654182A1/en
Application granted granted Critical
Publication of FR2654182B1 publication Critical patent/FR2654182B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F16L3/205—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 having supporting springs
    • F16L3/2053—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 having supporting springs the axis of each spring being parallel with the direction of the movement of the pipe
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/035—Noise absorbers in the form of specially adapted hangers or supports

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Shock absorber for horizontal pipe, characterised in that it includes an immobile support (1) including two sets (3, 3') of shock-absorbing pads (4) located on either side of a lightweight vertical plate (10) provided with a central opening (11) through which the horizontal pipe (13) passes, the said plate (10) being pressed on both sides by the pads (4) and being capable of sliding vertically whilst remaining orthogonal to the pipe (13). When the mean position of the pipe 13 changes, the intermediate plate 10 slides with respect to the support 1. No static stress therefore remains in the pipe 13.

Description

On connaît des amortisseurs pour tuyaux mais ceux-ci créent des efforts statiques dans les tuyaux ce qui est nuisible à leur bonne tenue en service. Pipe dampers are known, but these create static forces in the pipes, which is detrimental to their good performance in service.

L'amortisseur selon la revendication 1 permet de protéger contre les vibrations un tuyau horizontal pouvant subir des déplacements statiques importants sans créer d'efforts statiques dans celle-ci. The damper according to claim 1 makes it possible to protect against vibration a horizontal pipe which can undergo significant static displacements without creating static forces therein.

La plaque intermédiaire solidaire du tuyau peut glisser dans un plan vertical entre les coussins du support en subissant une force de frottement. Ainsi cette plaque prend une nouvelle position lorsque le tuyau subit des déplacements statiques, elle vibre autour de sa position d'équilibre lorsque le tuyau subit une sollicitation dynamique basse fréquence et elle s'immobilise du fait de son inertie lorsque le tuyau subit une sollicitation dynamique haute fréquence. The intermediate plate integral with the pipe can slide in a vertical plane between the cushions of the support by undergoing a frictional force. Thus this plate takes a new position when the pipe undergoes static displacements, it vibrates around its equilibrium position when the pipe undergoes dynamic low frequency stress and it stops due to its inertia when the pipe undergoes dynamic stress high frequency.

L'invention sera mieux comprise à la lumière de la description qui va suivre dans laquelle la figure 1 représente une vue éclatée de l'amortisseur selon l'invention. The invention will be better understood in the light of the description which follows, in which FIG. 1 represents an exploded view of the damper according to the invention.

La figure 2 représente une vue, dans l'axe du tuyau de l'amortisseur selon l'invention avec une partie du support et de la plaque intermédiaire arrachée. 2 shows a view, in the axis of the shock absorber pipe according to the invention with a part of the support and the intermediate plate torn off.

La figure 3 représente une coupe d'un coussin du support. Figure 3 shows a section through a support cushion.

L'amortisseur selon l'invention comporte un support 1 immobile soit fixé à une structure fixe soit suspendu. Dans ce dernier cas il possède une masse importante telle que ni les déplacements statiques ni les vibrations du tuyau 13 puissent provoquer son déplacement.The damper according to the invention comprises a stationary support 1 either fixed to a fixed structure or suspended. In the latter case it has a large mass such that neither the static displacements nor the vibrations of the pipe 13 can cause its displacement.

Le support 1 est constitué de deux plaques verticales 2,2' reliées par des tirants 21 qui les maintiennent écartées d'une distance donnée. Chacune de ces plaques 2,2' est munie intérieurement d'un groupe 3,3' de quatre coussins amortisseurs 4. The support 1 consists of two vertical plates 2,2 'connected by tie rods 21 which keep them spaced apart by a given distance. Each of these plates 2,2 'is internally provided with a group 3,3' of four shock-absorbing cushions 4.

Chaque coussin 4 comporte un logement 5 solidaire d'une des plaques 2,2' et une éponge métallique 6 disposée dans le logement 5 au-dessus d'un ressort 7. L'éponge 6 est fixée au ressort 7 par une vis 8. Une vis de réglage 9 permet en modifiant la longueur du ressort 7 de régler la force que chaque coussin 4 exerce sur une plaque intermédiaire 10 disposée entre les deux groupes 3 et 3' de coussins 4. Cette plaque intermédiaire 10 est choisie très légère et comporte une ouverture centrale 11. Each cushion 4 comprises a housing 5 secured to one of the plates 2,2 ′ and a metal sponge 6 disposed in the housing 5 above a spring 7. The sponge 6 is fixed to the spring 7 by a screw 8. An adjusting screw 9 makes it possible, by modifying the length of the spring 7, to adjust the force that each cushion 4 exerts on an intermediate plate 10 disposed between the two groups 3 and 3 'of cushions 4. This intermediate plate 10 is chosen to be very light and has a central opening 11.

Sur cette plaque 10 sont montés trois coussins amortisseurs 12, 12', 12" dont les axes sont disposés dans un plan vertical perpendiculaire au tuyau 13 et sont dirigés vers le centre de l'ouverture 11. On this plate 10 are mounted three shock-absorbing cushions 12, 12 ', 12 "whose axes are arranged in a vertical plane perpendicular to the pipe 13 and are directed towards the center of the opening 11.

Deux coussins 12, 12' sont constitués chacun d'une éponge métallique 14 fixée par une vis sur une base 15 commune, solidaire de la plaque 10. Two cushions 12, 12 'each consist of a metal sponge 14 fixed by a screw on a common base 15, integral with the plate 10.

Le troisième coussin 12" est constitué d'une éponge métallique 16 fixée sur une base 17. La base 17 est mobile verticalement par rapport à la base 15 et est poussée vers celle-ci par un dispositif à ressort 18. The third cushion 12 "consists of a metal sponge 16 fixed on a base 17. The base 17 is movable vertically relative to the base 15 and is pushed towards the latter by a spring device 18.

Les trois coussins 12, 12', 12" viennent emprisonner le tuyau 13. Pour améliorer le contact entre les éponges 14, 16 et le tuyau 13, celles-ci sont munies de plaques métalliques 19, 20. The three cushions 12, 12 ', 12 "trap the pipe 13. To improve the contact between the sponges 14, 16 and the pipe 13, these are provided with metal plates 19, 20.

Les plaques 2 et 2' sont munies d'une ouverture centrale 22, 22' à travers laquelle passe le tuyau 13. Ces ouvertures 22,22' ainsi que l'ouverture 11 sont reliées un bord de la plaque correspondante 2,2', 10 par une découpe qui permet le passage du tuyau. The plates 2 and 2 'are provided with a central opening 22, 22' through which the pipe 13 passes. These openings 22, 22 'as well as the opening 11 are connected to an edge of the corresponding plate 2.2', 10 by a cutout which allows the passage of the pipe.

Le tuyau horizontal 13 a une masse M entre deux points de supportage. The horizontal pipe 13 has a mass M between two support points.

La plaque intermédiaire 10 avec ses coussins 12, 12', 12" très légère par rapport à la masse du tuyau est choisie inférieure à M .  The intermediate plate 10 with its cushions 12, 12 ', 12 "very light compared to the mass of the pipe is chosen to be less than M.

5
La plaque intermédiaire 10 est insérée entre les deux groupes 3, 3' de coussins 4 du support 1. Celui-ci dans la mesure où il n'est pas fixé à une structure fixe doit avoir une masse importante par rapport à la masse du tuyau (par exemple supérieure à 5M). 5
The intermediate plate 10 is inserted between the two groups 3, 3 'of cushions 4 of the support 1. The latter, insofar as it is not fixed to a fixed structure, must have a large mass relative to the mass of the pipe (for example greater than 5M).

Lorsque la position moyenne du tuyau 13 change, la plaque intermédiaire 10 glisse par rapport au support 1. Aucune contrainte statique ne persiste alors dans le tuyau 13. When the average position of the pipe 13 changes, the intermediate plate 10 slides relative to the support 1. No static stress then persists in the pipe 13.

Lorsque le tuyau 13 vibre avec des fréquences basses (inférieures ou égales à la première fréquence propre du tuyau), la plaque intermédiaire 10 est entraînée. Le déplacement relatif entre la plaque 10 et le support 1 provoque une dissipation d'énergie due aux efforts générés par le frottement de la plaque sur les coussins 4. When the pipe 13 vibrates with low frequencies (less than or equal to the first natural frequency of the pipe), the intermediate plate 10 is driven. The relative displacement between the plate 10 and the support 1 causes a dissipation of energy due to the forces generated by the friction of the plate on the cushions 4.

Le réglage des ressorts 7 permet de choisir à partir de quel niveau de sollicitation le mouvement relatif de la plaque 10 et du support débute. On réglera de préférence ces ressorts 7 de façon que la force de frottement totale soit de l'ordre du poids de la tuyauterie 13 (M.G). The adjustment of the springs 7 makes it possible to choose from which stress level the relative movement of the plate 10 and of the support begins. These springs 7 will preferably be adjusted so that the total friction force is of the order of the weight of the pipe 13 (M.G).

La présence des ressorts 7 permet en outre d'assurer le contact des coussins 4 avec la plaque 10 s'il y a usure des coussins 4', cette usure consécutive au frottement étant inévitable. The presence of the springs 7 also makes it possible to ensure the contact of the cushions 4 with the plate 10 if there is wear of the cushions 4 ′, this wear consecutive to friction being inevitable.

Lorsque la fréquence des vibrations est plus élevée la plaque 10 s'immobilise sous l'effet de sa propre inertie. Il y a dissipation d'énergie dans les coussins 12, 12', 12" appliqués au tuyau 13. Le seul effort statique appliqué au tuyau par l'amortisseur selon l'invention est donc le poids de la plaque intermédiaire 10.  When the vibration frequency is higher, the plate 10 stops under the effect of its own inertia. Energy dissipates in the cushions 12, 12 ′, 12 "applied to the pipe 13. The only static force applied to the pipe by the damper according to the invention is therefore the weight of the intermediate plate 10.

Claims (3)

Revendications:Claims: 1/ Amortisseur de tuyau horizontal caractérisé en ce qu'il comporte un support immobile (1) comportant deux groupes (3, 3') de coussins amortisseurs (4) disposés de part et d'autre d'une plaque (10) verticale légère munie d'une ouverture centrale (11) à travers laquelle passe le tuyau horizontal (13), ladite plaque (10) étant pressée sur ses deux côtés par les coussins (4) et pouvant coulisser verticalement en restant orthogonale au tuyau (13), la plaque (10) étant munie autour de son ouverture (11) de plusieurs coussins amortisseurs (12, 12', 12") dont les axes sont dans un plan vertical orthogonal au tuyau (13) et sont dirigés vers le centre de l'ouverture (11), leur écartement étant réglable pour venir emprisonner le tuyau (13).1 / Horizontal pipe damper characterized in that it comprises a stationary support (1) comprising two groups (3, 3 ') of damping cushions (4) arranged on either side of a light vertical plate (10) provided with a central opening (11) through which the horizontal pipe (13) passes, said plate (10) being pressed on its two sides by the cushions (4) and being able to slide vertically while remaining orthogonal to the pipe (13), the plate (10) being provided around its opening (11) with several shock-absorbing cushions (12, 12 ', 12 ") whose axes are in a vertical plane orthogonal to the pipe (13) and are directed towards the center of the opening (11), their spacing being adjustable so as to trap the pipe (13). 2/ Amortisseur selon la revendication 1 caractérisé en ce que les coussins amortisseurs (12, 12', 12") montés sur la plaque (10) sont fixés sur des bases (15, 17) dont certaines (15) sont fixées sur la plaque (10), la ou les autres (17) étant mobiles par rapport à ladite plaque (10) et étant appliquée(s) dans la direction du ou des bases fixes (15) par des moyens à ressort (18). 2 / Shock absorber according to claim 1 characterized in that the shock absorber cushions (12, 12 ', 12 ") mounted on the plate (10) are fixed on bases (15, 17) some of which (15) are fixed on the plate (10), the other (s) (17) being movable relative to said plate (10) and being applied (s) in the direction of the fixed base (s) (15) by spring means (18). 3/ Amortisseur selon l'une des revendications précédentes caractérisé en ce que les coussins (4) enserrant la plaque intermédiaire (10) comportent des moyens (7, 9) permettant de régler leur pression sur la plaque (10). 3 / Shock absorber according to one of the preceding claims characterized in that the cushions (4) enclosing the intermediate plate (10) comprise means (7, 9) for adjusting their pressure on the plate (10).
FR8914505A 1989-11-06 1989-11-06 SHOCK ABSORBER OF HORIZONTAL ELEMENTS OF FREE POSITIONING PIPES. Expired - Lifetime FR2654182B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8914505A FR2654182B1 (en) 1989-11-06 1989-11-06 SHOCK ABSORBER OF HORIZONTAL ELEMENTS OF FREE POSITIONING PIPES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8914505A FR2654182B1 (en) 1989-11-06 1989-11-06 SHOCK ABSORBER OF HORIZONTAL ELEMENTS OF FREE POSITIONING PIPES.

Publications (2)

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FR2654182A1 true FR2654182A1 (en) 1991-05-10
FR2654182B1 FR2654182B1 (en) 1992-01-10

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FR8914505A Expired - Lifetime FR2654182B1 (en) 1989-11-06 1989-11-06 SHOCK ABSORBER OF HORIZONTAL ELEMENTS OF FREE POSITIONING PIPES.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789707A (en) * 1993-12-01 1998-08-04 N.V. Raychem S.A. Sealing device
CN113048292A (en) * 2021-02-07 2021-06-29 嵊州市浙江工业大学创新研究院 Multi-applicability pipeline friction vibration damper

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB535823A (en) * 1938-12-10 1941-04-23 Gen Spring Corp Improvements in spring supports particularly for pipe lines
EP0048598A2 (en) * 1980-09-24 1982-03-31 Korfund Dynamics Corporation Vibration isolation system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB535823A (en) * 1938-12-10 1941-04-23 Gen Spring Corp Improvements in spring supports particularly for pipe lines
EP0048598A2 (en) * 1980-09-24 1982-03-31 Korfund Dynamics Corporation Vibration isolation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789707A (en) * 1993-12-01 1998-08-04 N.V. Raychem S.A. Sealing device
CN113048292A (en) * 2021-02-07 2021-06-29 嵊州市浙江工业大学创新研究院 Multi-applicability pipeline friction vibration damper

Also Published As

Publication number Publication date
FR2654182B1 (en) 1992-01-10

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