DE1945483C

DE1945483C - Rotary flap valve, especially for concrete delivery pumps

Info

Publication number: DE1945483C
Authority: DE
Inventors: Karl Dipl Ing 7024 Bernhausen Schlecht
Original assignee: Putzmeister GmbH, Chur (Schweiz)
Publication date: 1972-12-14

Description

Steuerelemente, beispielsweise mit Hilfe eines Hydraulikzylinders, um seine Achse geschwenkt und gleichzeitig die Bewegungsrichtung der beiden Förderkolben umgekehrt. Dieses Spiel wiederholt sich in umgekehrter Richtung nach jedem vollen Hub der beiden Förderkolben.Control elements, for example with the help of a hydraulic cylinder, pivoted about its axis and at the same time the direction of movement of the two delivery pistons vice versa. This game is repeated in the opposite direction after each full stroke of the two delivery pistons.

Der rückwärtige, einen Stutzen zum Anschluß der Druckförderleitung aufweisende Teil des Ventilgehäuses ist mittels eines Flansches 7 mit dem zylinseitigen Teil des Ventilgehäuses verbunden, so daß das Ventilgehäuse zum Zweck der Reinigung leicht zugänglich ist. Hierdurch ergeben sich gleichzeitig kurze Abmessungen für den Versand und Transport der Einzelteile der Vorrichtung.The rear part of the valve housing which has a connecting piece for connecting the pressure delivery line is connected by means of a flange 7 to the cylinder-side part of the valve housing, so that the valve housing is easily accessible for cleaning. This results at the same time short dimensions for shipping and transporting the individual parts of the device.

Zwischen jeweils einer Seitenwand des rückwärtigen Ventilgehäuses und dem gegen diese Wand anliegenden Flügel 5 der Drehklappe bildet sich ein winkelförmiger Totraum, in dem sich während des Druckhubes Fördergut ansammelt, das eine zusätzliche Abdichtung des Saugraumes bewirkt. Hierdurch wird verhindert, daß das Fördergut bei seiner Bewegung durch das Ventilgehäuse Flüssigkeit verliert und infolge von Verdickung das Ausstoßen in die Druclcförderleitung erschwert oder womöglich zu Verstopfungen Anlaß gibt. Between each side wall of the rear valve housing and the one resting against this wall Wing 5 of the rotary flap forms an angular dead space in which during the Pressure stroke conveyed material accumulates, which is an additional Sealing of the suction chamber causes. This prevents the material being conveyed during its movement Liquid loses through the valve housing and, as a result of thickening, it is expelled into the pressure delivery line difficult or possibly cause constipation.

Bei dem in Fig. 2 dargestellten Ausfuhrungsbeispiel ergibt sich ein besonders günstiger großer An-In the exemplary embodiment shown in FIG. 2, there is a particularly favorable, large

saugquerschnitt, der das Ansaugen des Fördergutes in die unmittelbar an das Ventilgehäuse heranreichenden Förderzylinder 11 und 12 erleichtert. Während des Druckhubes wird die Förderung des Fördergutes in die tiefer gelegene Auslaßöffnung 13suction cross section, which is the suction of the conveyed material into the delivery cylinders 11 and 12 which reach directly to the valve housing. During the pressure stroke, the conveyed material is conveyed into the lower outlet opening 13

erleichtert. Aus Fig. 2 ist des weiteren ersichtlich, daß die Flügel 15 der um die im wesentlichen waagerecht angeordnete Achse 14 gelagerten Drehklappe die Bewegung des Fördergutes nicht behindern.facilitated. From Fig. 2 it can also be seen that that the wings 15 of the substantially horizontal arranged axis 14 mounted rotary flap do not hinder the movement of the material to be conveyed.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

Wing of the rotary flap in a manner known per se. Claims: are arranged at an angle to one another. Optimal conditions for the output of the conveying

1. At the end faces of two goods in one plane during the pressure stroke, delivery cylinder S arranged parallel to one another if the axis of rotation of the valve flap is essentially flanged Rotary flap valve, which the two borrowed perpendicular to the one conveyed by the two cylinder cylinders The öffin is arranged alternately with a plane going from above the valve housing opening suction channel angle of the two flap wings is here and one on the two conveyor cylinders advantageously chosen so that in the two opposite side to the valve housing an- io end positions of the flap each have a wing parallel Flanged pressure channel connects and a two- to the end face of a delivery cylinder is while has winged rotary flap, characterized in that the other wing is parallel to the side wall of the slide, that the wings (5, 15) of the upper housing is so that the flow cross-section Rotary flap ejected in a manner known per se in the winch during the Dnickhub'es are arranged to each other. 15. good in the area of the valve body no

2. Rotary flap valve according to claim 1, which is narrowed. This arrangement also results in characterized in that the axis (4) of the voltage advantages in sealing the pressure and Rotary flap (5) essentially perpendicular to the suction flow cross-sections. Since here the Kondurch the axes of the delivery cylinders (1, 2) were not formed against a concrete mixture, for example Level is arranged. Ao changes will also increase the risk of constipation

3. Rotary flap valve according to claim 1, counteracted.

characterized in that the axis (14) of the same advantages arise in particular when

Rotary flap (15) essentially parallel to the suction stroke when the arrangement of the rotary flap in the

Axes of the delivery cylinder (11, 12) and the slide housing is made so that the axis of the

lassstutzen (13) centrally below this conveying »5 rotary flap parallel to the axes of the two conveying

cylinder is arranged. the cylinder runs. Such an embodiment results in a particularly large intake cross

cut as the suction cylinder with its full

Cross-section directly into the intake funnel or

The invention relates to a stirrer arranged on the end faces of two over the slide valve housing Forwerk containers arranged parallel to one another opens into a plane. This arrangement is above The cylinder flanged butterfly valve, which is also of particular advantage when the outlet die two delivery cylinders alternately with a socket of the valve housing on the back of the Suction and pressure channel connects and a slide valve housing is arranged so that the conveyor has two wings Has rotary flap, in particular for 35 line extends in the direction of the delivery cylinder. Concrete delivery pumps, in which the viscous For- Such a design is special because of its dergut from a mostly short design above the valve housing advantageously arranged in such concrete Feed hopper alternately used in pumps on a motor vehicle the delivery cylinder is sucked and then built into one of the. Here, the An and Abmon valve housing Connected delivery line printed 40 animals from delivery line parts at the start of work will. and omitted at the end of work.

These rotary flap valves usually have a double-leaf rotary flap in the drawing, both of which are of the same size and are shown schematically. It shows
Wing together with the axis of rotation in one plane F i g. 1 a horizontal cross-section through the lying. In German Auslegeschrift 1 296 524, 45 valve housings in the axis plane of the delivery cylinder, such a rotary flap valve, are explained and illustrated. 2 shows a vertical section through the valve, housing with an essentially horizontally arranged

However, this design of the rotary valve has the rotary valve axis.

various disadvantages. If the flap is arranged in such a way that its axis of rotation is perpendicular to the play through 50, the material to be conveyed is alternately from the plane beneath the two conveying cylinders 1 and 2 laid down by the axes of the two conveying cylinders, This results in a line 3 sucked in or pressed into the pressure conveying arrangement in the longitudinal direction of the conveying cylinder for the entire suction channel 6. The intake duct 6 opens into the relatively large dimensions, which are disadvantageous when installed in the space between the two conveying pumps of this type on motor vehicles. 55 cylinders expanding part of the valve housing. If the flap is placed in the 4-way housing in such a way that the axis of rotation is parallel to the longitudinal axis of the two delivery cylinders, the axis of rotation is parallel to the vertical axis 4 of the two delivery cylinders, resulting in a rotating flap mounted in a bar closed, while the other wings of the rotary flap are parallel to the end of the conveyed material during the pressure stroke due to the necessary deflection. Space on the side of the pressure pipe 3 be-The invention is therefore based on the object, limits The suction process is avoided by avoiding these disadvantages and the valve slide, not shown, by the Anso so that the conveyed material, in particular the suction channel slips Conveyed goods and the others during the pressure stroke, only weakly and evenly, favors the large cross-section that is presented to it,
result in curved flow paths. If the two pistons of the delivery cylinder 1 reach their end position according to the invention with a slide and 2, the rotary flap 5 is achieved in an above-mentioned manner in that the known manner by means of known switching and