WO1986003263A1 - Installation destinee a amortir les oscillations dans des systemes fermes de transport de liquides - Google Patents

Installation destinee a amortir les oscillations dans des systemes fermes de transport de liquides Download PDF

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Publication number
WO1986003263A1
WO1986003263A1 PCT/HU1985/000070 HU8500070W WO8603263A1 WO 1986003263 A1 WO1986003263 A1 WO 1986003263A1 HU 8500070 W HU8500070 W HU 8500070W WO 8603263 A1 WO8603263 A1 WO 8603263A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
damper
point
containers
container
Prior art date
Application number
PCT/HU1985/000070
Other languages
German (de)
English (en)
Inventor
György DEZSO^"
Mátyás FARKAS
Tibor Lakatos
Zsuzsanna KIGYÓSNÉ PINTÉR
Original Assignee
Energiagazdálkodási Intézet
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Energiagazdálkodási Intézet filed Critical Energiagazdálkodási Intézet
Publication of WO1986003263A1 publication Critical patent/WO1986003263A1/fr
Priority to DK357586A priority Critical patent/DK357586D0/da

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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
    • F16L55/05—Buffers therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves

Definitions

  • the invention relates to an arrangement for damping z. B. in the event of malfunctions occurring vibrations in closed liquid handling systems in which a circulation pump is provided and the pressure is kept at least at one point in the system between predetermined limits.
  • a typical example of the liquid conveying systems mentioned above are the district heating supply systems, in which the hot water is conveyed from a heating plant to the consumers via long pipelines of sometimes more than 100 km.
  • the hydraulic transient phenomena that arise in the event of malfunctions in the system and the consequent pressure waves cause the greatest difficulties in project planning, design and operation. It has been found that these phenomena and effects can catastrophically destroy the liquid delivery systems.
  • the transient phenomena arise when the circulation pump of the conveyor system fails, which can occur as a result of a technical fault in the pump or as a result of the failure of the power supply.
  • This creates significant pressure waves that pass through the system and affect each other Reflect point of the system.
  • the time elapsing before the arrival of the reflected pressure wave is called the main time, which is characteristic of a given system. In larger systems, this main time can e.g. B. 8 to 10 s.
  • the invention is based on the object of creating an arrangement for damping vibrations in closed water conveyor systems, with which the risk of destruction of the conveyor system can be eliminated without overdimensioning.
  • the invention is based on the knowledge that the above-mentioned object can be easily achieved if the occurrence of the transient phenomena in the water transport system is prevented.
  • At least one damper container which absorbs the vibrations is now switched on into the system by a check valve, a preload pressure being present in the damper container which is different from the pressure at the connection point of the damper container.
  • the prestressing pressures set in the individual damper containers being different from one another.
  • the preload pressure can be greater or smaller, the further the damper reservoir is from the connection point of the system.
  • the damper containers are seen in the flow direction in front of the circulating pump, the non-return valves allowing liquid inlet into the containers and the preload pressures being greater than the operating pressure at the connection point of the containers.
  • the damper containers can be inserted after the circulating pump, the non-return valves allowing liquid to be discharged from the containers and the pretensioning pressures being less than the operating pressure at the connection point.
  • damper tanks are provided with means for resetting the parameters set in the initial state. This reset can be done automatically or by hand. Under the funds, liquidity can result and inlets as well as compressed air inlets and outlets and suitable closure members.
  • FIG. 1 shows a known closed liquid conveying system based on the example of a sketched district heating supply system
  • FIG. 2 shows the pressure flow in the corner points of the system shown in FIG 4 shows the pressure sequence as in FIG. 2, but for the embodiment of FIG. 3.
  • FIG. 1 shows a simplified model of a district heating supply system, in which the pressure at point 1 is kept approximately constant, at least between certain limits. Between the points 1 and 2 of the system is a flow line 8, which can be assumed to be resilient due to the large length. A consumer is switched on between points 2 and 3. Between the points 3 and 4 is a return line, which is also flexible. A circulation pump 5 is provided between points 4 and 1. The constant pressure in point 1 is ensured with a wind boiler 6.
  • FIG. 2 To illustrate the pressure peaks of the system shown in FIG. 1, reference is made to FIG. 2.
  • the constant pressure of point 2 of cca. 8.5 bar increases to approx. 16 bar after the fault, the pressure of cca. 6.6 bar from point 3 to approx. 14.5 bar.
  • the pressure in point 1 is in the observed period due to the Wind boiler 6 remained constant.
  • FIG. 3 shows an embodiment of the liquid conveying system which has been further developed according to the invention, likewise using the example of district heating supply.
  • the system shown in Fig. 1 is hiebei supplemented with two damper tanks 10 and 11, which are connected to the system by check valves 12 and 13 at point 4. These damper tanks are switched on before the circulation pump 5, so that, in the sense of the invention, the ⁇ spare pressure in them is greater than the operating pressure in point 4, namely in the steam tank 11 is greater than in the tank 10.
  • the series-connected damper tanks 10 and 11 are separated from the system by such check valves 12 and 13, which allow the liquid to enter the containers 10 and 11, but prevent the backflow.
  • the pressure diagram of Fig. 4 The above is illustrated by the pressure diagram of Fig. 4.
  • the constant operating pressure of the conveyor system is around 12 bar
  • the preload pressure of the damper container 10 is set to 5 bar
  • that of the damper container 11 is set to 7 bar
  • the operating pressure in point 4 is 3 bar.
  • the preload pressures of the damper reservoirs 10 and 11 are therefore higher than the operating pressure of the connection point 4.
  • the pressure in point 4 begins to increase steeply until after approx. 1.5 s the preload pressure of 5 bar of the damper container 10 is reached.
  • the speed of the pressure wave then suddenly drops.
  • the preload pressure from the damper reservoir 11/7 bar / is approx. Reached 12 s.
  • the pressure from point 4 increases slowly until the constant operating pressure of 12 bar, the cca. is exceeded with 0.2 bar. anu It can be clearly seen that there are no vibrations and extreme pressure peaks.
  • the pressures in points 2 and 3 also increase with less than 1 bar than the constant operating pressure.
  • the pressure of point 1 is kept constant in the exemplary embodiment shown, which in practice is called pressure maintenance in the upper point. If it is a pressure maintenance in the lower point, the damper tanks are connected to the pressure side of the circulation pump 5, point 1. In this case the Disturbance as a pressure drop in point 1, the creation and speed of movement of which are to be delayed by the damper containers.
  • the check valves between point 1 and the series-connected damper containers are arranged in reverse order as before, so that an outflow from the containers is made possible. So if the pressure at point 1 becomes lower than the pre-load pressure in the damper tank located closer to the point, the outflow from this tank begins.
  • damper containers 10 and 11 The number of damper containers 10 and 11 is determined in each case according to the special features of the conveyor system. In the example shown in the figures, it was sufficient to use two damper containers 10 and 11 to absorb the resulting shock waves. However, additional damper tanks can be connected in series if necessary.
  • care can also be taken to ensure that the output parameters of the damper containers 10, 11 are set again after an expired fault, ie after the function of the damper containers 10, 11.
  • water connections, compressed air connections, bypass connections to the conveying system and suitable closure elements can be provided.
  • These means can also be driven automatically, and the reset can take place automatically after the fault.
  • the design and arrangement of such means are routine tasks for a person skilled in the art, so that they do not require a more detailed description.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Vibration Prevention Devices (AREA)
  • Pipeline Systems (AREA)

Abstract

Installation destinée à amortir les oscillations dans des systèmes fermés de transport de liquides, dans laquelle une pompe de circulation est prévue et où au moins à un endroit du système de transport la pression est maintenue entre des limites fixées. Conformément à l'invention, au moins un récipient d'amortissement (10, 11) qui amortit les oscillations est mis en communication avec le système de transport par une soupape de retenue (12, 13), qui permet d'assurer dans le récipient d'amortissement (10, 11) une pression de précharge qui est différente de la pression de fonctionnement du point de raccordement.
PCT/HU1985/000070 1984-11-29 1985-11-29 Installation destinee a amortir les oscillations dans des systemes fermes de transport de liquides WO1986003263A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK357586A DK357586D0 (da) 1984-11-29 1986-07-28 Anordning til daempning af svingninger i et lukket vaesketransportsystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU844404A HU191726B (en) 1984-11-29 1984-11-29 Connection arrangement of damping dashpot
HU4404/84 1984-11-29

Publications (1)

Publication Number Publication Date
WO1986003263A1 true WO1986003263A1 (fr) 1986-06-05

Family

ID=10967869

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1985/000070 WO1986003263A1 (fr) 1984-11-29 1985-11-29 Installation destinee a amortir les oscillations dans des systemes fermes de transport de liquides

Country Status (4)

Country Link
DE (2) DE3590605D2 (fr)
HU (1) HU191726B (fr)
SE (1) SE463933B (fr)
WO (1) WO1986003263A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825279A1 (de) * 1988-07-26 1990-02-01 Bayerische Motoren Werke Ag Hydraulikeinrichtung, insbesondere zur stabilisierung und niveauregelung eines fahrzeugs
DE4109450A1 (de) * 1991-03-22 1992-09-24 Teves Gmbh Alfred Schlupfgeregelte bremsanlage, insbesondere fuer kraftfahrzeuge
US5385395A (en) * 1991-03-22 1995-01-31 Alfred Teves Gmbh Slip-controlled brake system, especially for automotive vehicles
WO2000036329A1 (fr) * 1998-12-14 2000-06-22 Merck Patent Gmbh Systeme de transport de liquides sans pulsation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6158983A (en) * 1997-04-24 2000-12-12 Trw Inc. Pump having muffler for attenuating noise
DE19811400A1 (de) * 1998-03-16 1999-09-23 Smr De Haan Gmbh Vorrichtung zum Beschichten von Blechen oder Bändern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1225012B (de) * 1959-10-28 1966-09-15 Gewerk Eisenhuette Westfalia Anordnung zur Abschwaechung von in den Anschlussleitungen hydraulisch angetriebener Arbeitsmaschinen durch die Verzoegerung bewegter Massen auftretender Druckstoesse
US4312382A (en) * 1979-03-14 1982-01-26 Firma J. Wagner Gmbh Pressure peak compensator for pulsating streams of liquid
DE3300493A1 (de) * 1983-01-08 1984-07-12 Robert Bosch Gmbh, 7000 Stuttgart Druckversorgungseinrichtung fuer zwei verbraucher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1225012B (de) * 1959-10-28 1966-09-15 Gewerk Eisenhuette Westfalia Anordnung zur Abschwaechung von in den Anschlussleitungen hydraulisch angetriebener Arbeitsmaschinen durch die Verzoegerung bewegter Massen auftretender Druckstoesse
US4312382A (en) * 1979-03-14 1982-01-26 Firma J. Wagner Gmbh Pressure peak compensator for pulsating streams of liquid
DE3300493A1 (de) * 1983-01-08 1984-07-12 Robert Bosch Gmbh, 7000 Stuttgart Druckversorgungseinrichtung fuer zwei verbraucher

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825279A1 (de) * 1988-07-26 1990-02-01 Bayerische Motoren Werke Ag Hydraulikeinrichtung, insbesondere zur stabilisierung und niveauregelung eines fahrzeugs
DE4109450A1 (de) * 1991-03-22 1992-09-24 Teves Gmbh Alfred Schlupfgeregelte bremsanlage, insbesondere fuer kraftfahrzeuge
US5385395A (en) * 1991-03-22 1995-01-31 Alfred Teves Gmbh Slip-controlled brake system, especially for automotive vehicles
WO2000036329A1 (fr) * 1998-12-14 2000-06-22 Merck Patent Gmbh Systeme de transport de liquides sans pulsation
US6623248B1 (en) 1998-12-14 2003-09-23 Merck Patent Gmbh System for conveying liquids without pulsing

Also Published As

Publication number Publication date
HU191726B (en) 1987-03-30
SE8603230D0 (sv) 1986-07-28
SE8603230L (sv) 1986-07-28
DE3590605D2 (en) 1987-01-29
DE3590605C1 (de) 1990-05-17
SE463933B (sv) 1991-02-11

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