EP1071897A1 - Garniture pour l'inversion du sens d'ecoulement d'un milieu - Google Patents

Garniture pour l'inversion du sens d'ecoulement d'un milieu

Info

Publication number
EP1071897A1
EP1071897A1 EP99913177A EP99913177A EP1071897A1 EP 1071897 A1 EP1071897 A1 EP 1071897A1 EP 99913177 A EP99913177 A EP 99913177A EP 99913177 A EP99913177 A EP 99913177A EP 1071897 A1 EP1071897 A1 EP 1071897A1
Authority
EP
European Patent Office
Prior art keywords
openings
chambers
primary
connections
housing
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.)
Withdrawn
Application number
EP99913177A
Other languages
German (de)
English (en)
Inventor
Hermann Heeren
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.)
BERKENBUSCH Stefan
Original Assignee
BERKENBUSCH Stefan
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 BERKENBUSCH Stefan filed Critical BERKENBUSCH Stefan
Publication of EP1071897A1 publication Critical patent/EP1071897A1/fr
Withdrawn legal-status Critical Current

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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves

Definitions

  • the invention relates to a fitting for reversing the direction of flow of a medium, with a housing which has two primary connections, namely an inlet and outlet for the medium, and two secondary connections connected by a secondary line, and with a valve arrangement accommodated in the housing for exchanging the connections between the primary and secondary connections.
  • Such fittings are used, for example, in piping systems for heat exchangers, in the tubes of which cleaning brushes are moved back and forth by periodically reversing the direction of flow of the medium.
  • separate valve fittings are used that are electrically coupled. In small and medium-sized systems, however, the effort for piping can be significantly reduced if only one fitting is used for the flow reversal.
  • a simple example of such a valve is a four-way valve, the rotating plug of which connects two of the four ways.
  • a crossover of the pipes is inevitable.
  • a disadvantage of these known fittings is that the total length of the required seals is relatively large, so that correspondingly high costs arise, and, especially at relatively high system pressures, a satisfactory seal in the end positions of the valve member is difficult to achieve, so that not inconsiderable Leakage losses can occur.
  • the displacement path of the piston In the case of an axial piston, the displacement path of the piston must also be relatively large, so that a correspondingly high level of wear occurs and the efficiency of the valve is also impaired by relatively long switching times.
  • these disadvantages can only be largely avoided if the rotary lobe has a relatively complicated shape, which causes correspondingly high manufacturing costs.
  • the object of the invention is to create a fitting of the type mentioned at the outset, which is of compact construction and simple to produce and is distinguished by good sealing properties and short switching times.
  • the housing is divided by partitions into two primary chambers, each of which is assigned to one of the primary connections, and two secondary chambers, each of which is assigned to one of the secondary connections, in that each primary chamber has a partition with an opening each of the secondary chambers has in common, and that the valve arrangement is formed by two separate valve members, each of which alternately opens and closes two of the openings.
  • valve members which can however be driven synchronously, can achieve a considerable structural simplification of the valve without the connected pipelines having to cross one another.
  • the short travel ranges of the two valve elements also shorten the switching times and reduce wear.
  • the sealing properties of the valve are improved, since in principle only the edges of the four openings in the partition walls need to be sealed.
  • valve members can optionally be designed as rotary pistons or as axial pistons.
  • the design as a rotary lobe enables simple manufacture.
  • the rotary pistons can be designed simply as hollow cylinders, which are accommodated in the associated chambers of the housing in a rotatable and media-tight manner and have two axially offset openings in their wall, which, depending on the angular position, are aligned with one of the openings in the walls of the chamber.
  • the openings in the rotary lobes or the partition walls of the chamber need only be so far offset from one another in the circumferential direction that one opening is securely closed when the other opening is fully open. Consequently, the rotary angles of the rotary pistons required for switching need only be correspondingly small, so that wear is minimized and short switching times are made possible.
  • each valve member is simply formed by two swash plates arranged obliquely on a common axis, each of which is arranged in an opening of a dividing wall positioned at the same angle obliquely to the axis of rotation, so that they either release or close the opening depending on the angular position .
  • the embodiment with axial pistons has the advantage that wear on the sealing surfaces can be minimized and, in addition, a high sealing effect can be achieved by pressing the valve members against the sealing surfaces. Since the two valve members designed as axial pistons each move in opposite directions to one another, the hydrostatic forces occurring on the two axial pistons cancel each other out in the event of a pressure drop in the secondary circuit, so that, similarly to rotary piston fittings, no high forces are required to move the valve members in their respective end positions to hold and / or to move them from the end position when switching.
  • FIG. 1 shows a longitudinal section through a fitting according to a first embodiment.
  • Fig. 2 is a side view of one of two rotary pistons of the valve
  • FIG. 3 shows a section along the line III-III in Fig. 2.
  • Figures 4 - 6 a rotary piston according to a modified embodiment in a front view, side view and top view;
  • FIG. 7 shows a section through a fitting according to a second exemplary embodiment
  • Fig. 8 shows the valve of Figure 7 in plan view.
  • FIG. 10 A - C perspective views of a valve plate of the fitting according to FIG. 9 in different positions.
  • the fitting shown in Fig. 1 has a housing 10 with an oval-cylindrical jacket 12, which is closed at the upper and lower ends by plates 14, 16.
  • a partition 18 arranged halfway between the plates 14, 16 divides the housing 10 into an upper chamber 20 and a lower chamber 22.
  • each tube 24, 26 forms a chamber 32, which will be referred to below as the primary chamber, while the chambers 20 and 22 are referred to as secondary chambers.
  • the lower ends 34, 36 of the tubes 24 and 26 are referred to as primary connections.
  • the primary connection 34 forms an inlet for a liquid or gaseous medium, while the primary connection 36 forms an outlet for this medium.
  • a secondary connection 38, 40 is formed in the jacket 12 within each of the secondary chambers 20, 22.
  • the secondary connections 38 and 40 are connected to one another by a secondary line S shown in FIG. 2, for example the tube system of a heat exchanger. bound.
  • two openings 42, 44 are recessed, each of which lies in one of the secondary chambers 20, 22 and are offset from one another in the circumferential direction by an angle of, for example, 90 ° or slightly more than 90 °.
  • the opening 42 is only indicated by dashed lines, since it is invisible in the cut part of the tube 24.
  • the openings 42 and 44 are arranged symmetrically to the longitudinal center plane of the housing 10, and both face the interior of the housing 10.
  • the tube 36 has two openings 46 and 48, which are arranged point-symmetrically to the openings 42 and 44. Through openings 42, 44, 46 and 48, each primary chamber 32 is connected to each of the secondary chambers 20, 22.
  • Each of the tubes 24, 26 serves to rotatably receive a rotary piston 50, the structure of which is shown in FIG. 3.
  • the rotary piston has the shape of a hollow cylinder 52 which is open at the lower end and closed at the upper end, in the jacket of which two openings 54, 56 are cut out, which are at the same height as the openings 42 and 44 or 46 and 48 and have approximately the same internal width how these have openings.
  • Each opening 54, 56 is surrounded by a gasket 58, which seals on the inner surface of the tube 24 and 26, respectively.
  • An additional circumferential seal 60 between the openings 54 and 56 ensures that the rotary piston 50 is centered in the relevant primary chamber 32.
  • a shaft 62 extending from the upper end of the rotary piston can be rotated and is passed through the shaft bushing 30 in the plate 28 in a media-tight manner.
  • FIG. 2 shows the hollow cylinders 52 of the two rotary pistons inserted into the tubes 24 and 26.
  • the opening 54 of the rotary piston in the tube 24 is so angularly offset from the opening 42 of the tube that there is no overlap.
  • the primary chamber 32 formed in the interior of the tube 24 is thus sealed off from the secondary chamber 20.
  • the openings 54 and 46 of the rotary piston and the tube are aligned, so that the secondary chamber 20 is connected to the primary chamber 32 formed in the interior of the tube 26. Since the openings 44 and 48 are arranged angularly offset from the openings 42 and 46, however, the openings 56 of the rotary pistons have the same azimuth as the openings.
  • the conditions in the lower secondary chamber 22 are just reversed.
  • the medium introduced via the opening 34 thus passes through the opening 44 into the secondary chamber 22 and from there via the secondary connection 40 into the secondary line S.
  • the medium flowing back from the secondary line reaches the secondary connection 38 upper secondary chamber 20 and from there via opening 46 to outlet 36.
  • the shafts 62 of the two rotary pistons are coupled to one another by a gear, not shown, so that they can be driven in opposite directions.
  • a gear not shown
  • the opening 42 of the tube 24 is opened through the opening 54 of the rotary piston, and in the other tube 26 the Opening 46 blocked by the rotary piston.
  • the conditions in the lower secondary chamber 22 also reverse accordingly.
  • the medium introduced via the inlet 34 then passes through the upper opening 42 into the upper secondary chamber 20 and now flows in the opposite direction to the previous flow direction, from the secondary connection 38 to the secondary connection 40, through the secondary line S. From the secondary connection 40, the medium passes through the lower secondary chamber 22 and the opening 48 again to the outlet 36.
  • the two rotary pistons 50 therefore only need to be rotated by a relatively small angle in order to reverse the direction of flow in the secondary line.
  • the rotary pistons do not have to overcome the pressure of the medium, so that only small actuating forces are required. Only small forces are required to fix the rotary lobes in their respective end positions.
  • the valve has a compact structure and facilitates the pipeline routing in that both the primary connections 34 and 36 and the secondary connections 38 and 40 each lie in one plane. While in the example shown the secondary connections 38 and 40 are arranged on the same side of the housing 10, it is optionally also possible to arrange the secondary connections on opposite sides of the housing. In general, the secondary connections can be arranged at any point on the jacket 12.
  • FIGs 4 to 6 show a modified embodiment of the rotary piston 50.
  • an S-shaped plate 64 is fastened to the shaft 62, which appears circular in the plan view according to FIG. 6 and seals on its entire circumferential edge on the inner surface of the tube 24 or 26. With its approximately vertically extending central region, the plate 64 thus separates the two openings 42 and 44 or 46 and 48, so that only one of these openings is connected to the inlet 34 and the outlet 36, respectively. Switching here requires the two rotary pistons to be turned by 180 ° each.
  • FIGS. 7 and 8 show a fitting in which the valve members are not designed as rotary pistons, but as axial pistons 66.
  • Each axial piston 66 has a piston rod 68 which is axially displaceable in the housing 10 and which carries two conical frustoconical valve disks 70 which are arranged in mirror image to one another.
  • the lower ends of the piston rods 68 are slidably held in guides 72 fixed to the housing and in the region of their upper ends they are led out of the housing 10 in a media-tight manner by means of passages 74.
  • a pinion 76 With the help of a pinion 76, the two piston rods 68 can be driven synchronously and in opposite directions.
  • the housing 10 has cambered upper and lower floors 78, which are each flanged together with the cylindrical jacket 12 with the interposition of a partition 80.
  • the various parts of the housing 10 are held together in a pressure-resistant manner by tie rods 81.
  • the secondary chambers 20 and 22 are each delimited by one of the bottoms 78 and the associated partition 80.
  • the secondary connections 38 and 40 lie on opposite sides of the housing.
  • the inlet 34 and the outlet 36 are formed here diametrically opposite one another in the jacket 12.
  • the two primary chambers 32 are separated from one another by a partition 82 arranged at right angles between the two partition walls 80.
  • the openings 42 and 44 are formed opposite one another in the partition walls 80, so that they can be closed alternately by the valve plate 70 of the left axial piston 66. The same applies to the openings 46 and 48 on the side of the outlet 36.
  • Fig. 9 shows an embodiment that in terms of the structure of the housing is similar to the embodiment of Fig. 7, but in which the valve members are again designed as rotary pistons 50.
  • the partition walls 80 are arranged at right angles to one another and are each set at an angle of 45 ° to the longitudinal axis of the housing 10.
  • each rotary piston 50 carries two swash plates 84 which are also set at an angle of 45 ° to the axis of the shaft 62 and which are arranged in the openings 42, 44, 46 and 48 in such a way that they either open these openings depending on the angular position close or release. In the open position, these swash plates 84 also act as guide plates that support the deflection of the flow of the medium.
  • the valve is switched by synchronously rotating both shafts 62 in the same or opposite direction by 180 °.
  • the movement carried out by the swash plates 84 is illustrated in FIGS. 10 A, 10 B and 10 C in 45 ° steps.
  • Each swashplate is provided on its edge with a seal, not shown, which seals on the inner edge of the associated opening (e.g. 42).
  • the functions of the primary and secondary chambers are interchangeable.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention concerne une garniture pour l'inversion du sens d'écoulement d'un milieu. La garniture selon l'invention comprend une enveloppe (10) présentant deux raccords primaires, à savoir une entrée et une sortie (36) pour le milieu, et deux raccords secondaires (38, 40) reliés par un conduit secondaire (S), ainsi qu'un système de valve situé dans l'enveloppe et servant à permuter les connexions entre les raccords primaires et secondaires. La garniture selon l'invention est caractérisée en ce que des parois de séparation (18, 24, 26; 80, 82) partagent l'enveloppe (10) en deux chambres primaires (32) à chacune desquelles est affecté un des raccords primaires (34, 36) et en deux chambres secondaires (20, 22) à chacune desquelles est affecté un des raccords secondaires (38, 40), en ce que chaque chambre primaire partage une paroi de séparation (24, 26; 80) munie d'une ouverture (42, 44, 46, 48) avec chacune des chambres secondaires (20, 22), et en ce que le système de valve est formé par deux éléments de valve séparés (50; 66) qui ouvrent et ferment alternativement deux des ouvertures (42, 44; 46, 48).
EP99913177A 1999-02-20 1999-02-20 Garniture pour l'inversion du sens d'ecoulement d'un milieu Withdrawn EP1071897A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1999/001114 WO2000049317A1 (fr) 1999-02-20 1999-02-20 Garniture pour l'inversion du sens d'ecoulement d'un milieu

Publications (1)

Publication Number Publication Date
EP1071897A1 true EP1071897A1 (fr) 2001-01-31

Family

ID=8167221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99913177A Withdrawn EP1071897A1 (fr) 1999-02-20 1999-02-20 Garniture pour l'inversion du sens d'ecoulement d'un milieu

Country Status (2)

Country Link
EP (1) EP1071897A1 (fr)
WO (1) WO2000049317A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10058516B4 (de) * 2000-11-24 2006-09-07 Audi Ag Mehrwegeventil
DE202006004749U1 (de) 2006-03-24 2006-06-29 Bürkert Werke GmbH & Co. KG Vorrichtung und Ventilkombination zur Fließumkehr von strömenden Medien
US9273450B2 (en) 2012-06-22 2016-03-01 Kohler Mira Limited Plumbing fixture with heating elements
GB2568271B (en) 2017-11-09 2020-04-22 Kohler Mira Ltd A plumbing component for controlling the mixture of two supplies of water

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1044523B (it) * 1975-07-18 1980-03-31 Gilardini Spa Valvola deviatrice a sei vie per liquidi
DE2608469A1 (de) 1976-02-27 1977-09-01 Vaillant Joh Kg Vier-wege-mischventil
US4312381A (en) * 1980-03-27 1982-01-26 Aladdin Heating Corporation Air flow damping system
US4469131A (en) * 1982-07-12 1984-09-04 Traylor Paul L Spool valve
DE3430860C2 (de) 1984-06-15 1994-08-25 Mesroc Gmbh Mehrwege-Armatur zum Umlenken von Strömungsrichtungen und/oder Regeln von Fördermengen von in Rohrleitungssystemen geführten, gasförmigen oder flüssigen Medien, insbesondere bei Röhrenwärmeaustauschern
IL72458A (en) 1984-07-20 1990-07-12 Arie Gur Flow diverter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0049317A1 *

Also Published As

Publication number Publication date
WO2000049317A1 (fr) 2000-08-24

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