DE2212763B1

DE2212763B1 - SWITCHING AND MIXING VALVE

Info

Publication number: DE2212763B1
Application number: DE19722212763
Authority: DE
Inventors: Ewald Kraft
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-03-16
Filing date: 1972-03-16
Publication date: 1973-06-28
Also published as: DE2212763C2

Description

Ein Ausführungsbeispiel der Erfindung wird an Hand der F i g. 1 bis 5 erläutert. Es zeigt F i g. 1 den Längsschnitt durch die Rohrweiche, An exemplary embodiment of the invention is illustrated with reference to FIGS. 1 to 5 explained. It shows F i g. 1 the longitudinal section through the transfer tube,

F i g. 7 eine Draufsicht auf die Platte nebst Welle bei strichpunktiert dargestelltem Rohrweichen-Gehäuse, F i g. 3 den Querschnitt durch die Rohrweiche, jedoch bei ungeschnittener Platte, F i g. 4 eine abgewandelte Ausführungsform der Platte und F i g. 5 die Rohrweiche in einer zum Mischen geeigneten Stellung. F i g. 7 shows a plan view of the plate together with the shaft at dash-dotted lines shown transfer tube housing, F i g. 3 the cross section through the transfer tube, but with the uncut plate, FIG. 4 shows a modified embodiment of FIG Plate and fig. 5 the transfer tube in a position suitable for mixing.

Die Rohrweiche besitzt das einstückige, rohrförmige Gehäuse 1. Von diesem geht radial der mittlere Rohrabschnitt 2 aus. Symmetrisch zu diesem sind in Gegenüberlage die Rohrabschnitte3, 4 an dem Gehäuse 1 angesetzt. Sämtliche Rohrabschnitte2, 3, 4 tragen endständige Flansche 5 zum Anschluß an entsprechende Rohrleitungen. The transfer tube has the one-piece, tubular housing 1. From the middle pipe section 2 emanates from this radially. Are symmetrical about this opposite the pipe sections 3, 4 attached to the housing 1. All pipe sections2, 3, 4 carry terminal flanges 5 for connection to corresponding pipelines.

Der in die Bohrung 1' des Gehäuses 1 mündende Durchströmkanal 6 bildet jenseits des Treffpunktes mit dieser Bohrung die wegführenden Durchströmkanäle 7, 8 aus, die zufolge der Rohrabschnitte 3, 4 gabelförmig wegführen. Die Durchströmkanäle6, 7, 8 haben gleich großen Querschnitt. The through-flow channel 6 which opens into the bore 1 'of the housing 1 forms on the other side of the point of contact with this borehole, the throughflow channels 7 leading away, 8, which lead away fork-shaped according to the pipe sections 3, 4. The flow channels6, 7, 8 have the same cross-section.

Das Verschlußteil der Rohrweiche ist als drehbar gelagerte Platte 9 mit elliptischer Umfangsform ausgebildet. Diese Platte 9 wird von einer den Treffpunkt der Durchströmkanäle 6, 7, 8 zentral kreuzenden Welle 10 in einer solchen Neigungsstellung getragen, daß sie sich in den beiden Extrem-Öffnungsstellungen siehe F i g. 1, jeweils zwischen der einen Mündungskante 11 bzw. 11' des mittleren Durchströmkanals 6 zur gegenüberliegenden Stirnfläche 12 des zwischen den gabelförmig wegführenden Durchströmkanälen angeordneten Zwischenabschnittes 13 erstreckt. The closure part of the transfer tube is a rotatably mounted plate 9 formed with an elliptical circumferential shape. This plate 9 is one of the meeting point of the throughflow channels 6, 7, 8 centrally intersecting shaft 10 in such an inclined position worn that they are in the two extreme opening positions see F i g. 1, respectively between the one mouth edge 11 or 11 'of the central throughflow channel 6 to opposite end face 12 of the through-flow channels leading away in the form of a fork arranged intermediate portion 13 extends.

Zufolge der im Durchmesser gleich großen Durchströmöffnungen befindet sich die den mittleren Durchströmkanal 6 zugekehrte Plattenhälfte in der Ebene der geradlinig zum Treffpunkt verlaufenden Mündungskante 11 bzw. 11'. Da die stirnseitige Umfangs-Randfläche 14 der Platte 9, ausgehend von der Zone der kleinsten Ellipsenachsex zu den Ellipsenscheitelzonen hin in sich kontinuierlich und in entgegengesetztem Sinne verändernden Neigungswinkel zur Platten-Ebene ausgerichtet ist. wird eine parallele Anlage der Umfangs-Randfläche 14 an der Wandung der Durchströmkanäle 7, 8 erzielt. Der Neigungswinkel der Platte in ihren Extrem-öffnungsstellungen ist so gewählt, daß die dem mittleren Durchströmkanal 6 zugekehrte Plattenhälfte in Dekkung mit der jeweiligen Mündungskante 11 bzw. 11' gelangt. Eine der Bohrung 1' genau angepaßte Um- fangs-Randfläche läßt sich beispielsweise einfachst durch Überdrehen derselben mittels einer Drehbank erzeugen. As a result of the through-flow openings of the same size in diameter the middle throughflow channel 6 facing plate half in the plane of the Muzzle edge 11 or 11 'running straight to the meeting point. Since the frontal Circumferential edge surface 14 of the plate 9, starting from the zone of the smallest axis of the ellipse towards the ellipse apex zones continuously and in opposite directions Meaning changing angle of inclination is aligned to the plane of the plate. will be a parallel contact of the peripheral edge surface 14 on the wall of the throughflow channels 7, 8 scored. The angle of inclination of the plate in its extreme opening position is chosen so that the plate half facing the central throughflow channel 6 in Cover with the respective mouth edge 11 or 11 'arrives. One of the hole 1 ' precisely adapted environment The catch edge surface can be easily turned over, for example produce the same by means of a lathe.

Der Teilbogen der Umfangs-Randfläche der anderen Plattenhälfte liegt im Bereich der Randkante 15 bzw. 15' des Zwischenabschnittes 13 an. Hierdurch wird ein günstiger Strömungsweg zwischen dem mittleren Rohrabschnitt 2 und dem jeweils wegführenden Rohrabschnitt 3 bzw. 4 erreicht. The partial arc of the peripheral edge surface of the other half of the plate lies in the area of the marginal edge 15 or 15 'of the intermediate section 13. This will a favorable flow path between the middle pipe section 2 and the respective Reaching away pipe section 3 and 4, respectively.

Die Plattenwelle 10 lagert in Stopfen 16, 17, die stirnseitig in die Bohrung 1' des Gehäuses 1 eingesetzt sind. Ein sich an der Stirnfläche des rohrförmigen Gehäuses 1 abstützender Bund 18 begrenzt die Einsteckbewegung. Zugleich kann dieser Bund 18 zur Befestigung der Stopfen 16, 17 an dem Gehäuse 1 dienen. The plate shaft 10 is supported in stoppers 16, 17, the end face in the bore 1 'of the housing 1 are inserted. One located on the end face of the tubular Housing 1 supporting collar 18 limits the insertion movement. At the same time, this can The collar 18 is used to fasten the plugs 16, 17 to the housing 1.

Gegen axiale Verschiebung ist die Welle 10 durch entsprechende Ringe 19 gesichert. The shaft 10 is protected against axial displacement by means of appropriate rings 19 secured.

Um auch einen günstigen Strömungsverlauf in dem der Platte gegenüberliegenden Bereich zu erhalten, bilden die Stopfen mit ihren Stirnflächen solche Wandungsabschnitte 20 aus, derart, daß hierdurch ein Übergang zwischen dem mittleren Rohrabschnitt und den beiden anderen Rohrabschnitten erzielt wird. Die Spurgerade G der Wandungsabschnitte 20 verläuft etwa parallel zur Neigungsstellung der Platte in deren Extrem-Öffnungsstellung. Jedoch endet die SpurgeradeG in einem solchen Abstand von der Mündungskante 11 bzw. 11', daß die Drehung der Platte nicht beeinträchtigt wird. In order to also have a favorable flow path in the one opposite the plate To obtain area, the stoppers form such wall sections with their end faces 20 in such a way that this creates a transition between the central pipe section and the other two pipe sections. The straight track G of the wall sections 20 runs approximately parallel to the inclined position of the plate in its extreme open position. However, the straight track G ends at such a distance from the mouth edge 11 or 11 'that the rotation of the plate is not affected.

Gemäß Fig. 1 tritt das dem Durchströmkanal 6 zugeführte Medium vollständig aus dem Durchströmkanal 7 aus. Soll dagegen das Medium durch den Durchströmkanal 8 geschickt werden, so ist eine Drehung der Platte um 1800 vorzunehmen, siehe strichpunktierte Darstellung in Fig. 1. Soll mittels der erfindungsgemäßen Rohrweiche eine Mischung zweier verschiedener Medien vorgenommen werden, ist die Platte in eine Zwischenstellung zu drehen, welche dem Mischungsverhältnis entspricht. Fig.5 zeigt eine um 900 gedrehte Platte9, was ein Mischungsverhältnis von 1:1 bedeutet. Das Mischungsverhältnis kann durch entsprechende Drehstellung der Platte stufenlos variiert werden. Die Wandungsabschnitte 20 verhindern, daß nach beendetem Mischungsvorgang Reste in der Rohrweiche verbleiben. According to FIG. 1, the medium supplied to the throughflow channel 6 occurs completely from the throughflow channel 7. If, however, the medium should pass through the flow channel 8 are sent, the plate must be rotated by 1800, see dash-dotted lines Representation in Fig. 1. Shall be a mixture by means of the diverter valve according to the invention two different media are made, the plate is in an intermediate position to turn which corresponds to the mixing ratio. Fig. 5 shows a rotated by 900 Plate9, which means a mixing ratio of 1: 1. The mixing ratio can be can be varied continuously by turning the plate accordingly. The wall sections 20 prevent residues from remaining in the transfer tube after the mixing process is complete.

Gemäß F i g. 4 ist in der Platte 9 in der Umfangs-Randfläche 14' eine Nut 21 zur Aufnahme eines Dichtungsringes 22 eingearbeitet. um auch bei flüssigen Medien gute Abdichtwerte zu erhalten. According to FIG. 4 is in the plate 9 in the peripheral edge surface 14 ' a groove 21 for receiving a sealing ring 22 is incorporated. around even with liquid Media to obtain good sealing values.

Claims

Claims: 1. Switching and mixing valve with one in the area the meeting point of the three cylindrical flow channels converging in one plane valve closure part rotatably mounted on a shaft that centrally crosses the meeting point, characterized in that the valve closure part as a plate (9) with an elliptical Circumferential shape is formed, which is arranged in such an inclination to the shaft (10) -t, - that they are in their extreme opening positions between a mouth edge (11 or 11 ') of the central through-flow channel (6) of the three through-flow channels and the opposite inner wall (12) of the two leading away between the fork-shaped other through-flow channels (7 and 8) lying intermediate section (13) extends.

2. Switching and mixing valve according to claim 1, characterized in that that the peripheral edge surface (14) of the plate (9) is circular-cylindrical in the direction of the actuation axis runs.

3. Switching and mixing valve according to claim 1, characterized in that that in the extreme opening positions of the mouth edge (11 or 11 ') of the former Durchströmkaals (6) facing away from the area of the peripheral edge surface (14) of the plate (9) each at a mouth edge (15 or 15 ') facing the intermediate section (13) one of the other two flow channels (7 or 8) is applied.

The invention relates to a switching and mixing valve with an im Area of the meeting point of the three cylindrical converging in one plane Through-flow channels rotatably mounted on a shaft that centrally crosses the meeting point Valve closure part.

It is known, such designs, in particular for heating systems to use. The boiler flow fluid and the heating return fluid become two through-flow channels supplied, while the third through-flow channel as a drain connection for the heating flow fluid serves. By means of the rotatably mounted valve closure part in the form of a plug can be the temperature of the heating flow fluid flowing into the heat exchangers regulated or controlled.

However, such a configuration is essentially only suitable a mixing of similar media, in particular liquids of different Temperatures. Influence the curve pieces provided on the valve closure part the flow temperature characteristic is favorable. However, leave the known configurations no mixing of different types of media, especially for example granular ones Media. The valve closure part also decreases in relation to the flow channels a large design, which increases the mixing performance, i.e. the flow rate of Medium, diminished.

The invention is based on the object of a generic switchover and Mfs'chvintil of simple construction, such that when used as a mixing valve two different media can be mixed in the best possible way; furthermore that should Valve closure part to the flow channels have a relatively small design.

This object is achieved by the invention specified in claim 1.

The subclaims represent advantageous embodiments of the inventive Solution.

As a result - such an embodiment is a generic switchover and mixing valve created, which is particularly suitable for mixing two different types Media is suitable. Is that designed as a plate with an elliptical circumferential shape Valve closure part in its extreme open position, no mixing yet occurs on. To the valve closure part from one to the other extreme open position the shaft carrying the plate is to be turned by 1800. The respective angle of rotation the shaft or the plate determines the mixing ratio of the two the fork-shaped arranged through-flow channels flowing in, which then flow through the middle, the fork-shaped arranged through-flow channels opposite Leave the flow channel through the mixing valve.

Is z. B. the valve closure part from the one extreme open position rotated by 900, the mix ratio is 1: 1. Starting from this The mixing ratio is then varied. The negligence of the In its extreme open position, the plate is selected so that unfavorable flow zones are avoided. Due to the plate-shaped design of the valve closure part the flow rate is reduced only insignificantly. Incidentally, this allows Design compared to the flow cross-section a small dimension of the invention Switching and mixing valve. If the medium is fed to the middle flow channel, can this completely through one or the other leading away through-flow channel step out. However, it is also possible with an intermediate position of the plate Incoming medium evenly aitf 'to distribute both outgoing flow channels. The intermediate section extending between the two throughflow channels leading away corresponds to the extension of the plate in relation to the longitudinal axis of the shaft, see above that there is a spatially extremely favorable utilization.

The circular-cylindrical peripheral edge surface also contributes to this the plate. The latter is supported on the bore wall of the valve housing, so that relatively thin material is used for the plate for various purposes can be. If great importance is attached to adequate sealing, we recommend thicker material for the plate. In the peripheral edge area could then a Groove for inserting a sealing ring can be provided. Otherwise the arrangement is the flow channels as well as the orientation or the inclination of the plate are selected in such a way that that in the extreme open positions of the plate there are no so-called dead zones, this means that there is a favorable flow path.