US 6,183,216 B2Granted

Arrangement for long-distance conveying of thick matter

AssigneePutzmeister Aktiengesellschaft

InventorErnst Bachner

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Abstract

The invention concerns an arrangement for conveying thick matter, in particular liquid concrete. The arrangement comprises a pump (12) which is to be charged on the input side with thick matter to be conveyed, and a distributor (10) which can be connected via a high-pressure feed line (20) to the pressure joint (30) of the pump (12) and preferably takes the form of a tunnel shuttering distributor. The high-pressure feed line (20) is connected both on the pump side and the distributor side to a pipe-switching device (22, 24) which can in each case be switched alternatively between two connections (26, 32, 40, 44). The pump-side pipe-switching device (22) is connected at its one connection (26) to the pressure joint (30) of the pump (12) and at its other connection (32) to the pressure joint (36) of a pressure medium pump (16) which can be acted upon by low-viscosity pressure medium via a reservoir (18). The distributor-side pipe-switching device (24) is connected by one of its connections (40) to the distributor (10) an by its other connection (44) via a return line (45) to the reservoir (18) of the pressure medium pump (16). In order to prevent the distributor side form being acted upon erroneously, the distributor-side pipe-switching device (24) can be switched over as a function of a change of material occurring in the in-coming flow and conveyed material.

Claims11

Dependent claims

An arrangement for long-distance conveying of thick matter, comprising:

a thick matter pump (12), the input of which is adapted to be charged with the thick matter to be conveyed, the output of which is connected via a connection (26) to the thick matter input of a first pipe switching device (22),
a pressure medium pump (16) which is adapted to be charged with a low-viscosity pressure medium by way of a reservoir (18), the output of which is connected via a connection (32) to the pressure medium input of said first pipe switching device (22),
a single high pressure conveyor line (20),
said first pipe switching device connected via said high pressure conveyor line (20) to a second pipe switching device (24), said first pipe switching device adapted to alternatingly connect said high pressure conveyor line (20) to said first pipe switching device thick matter input and to said first pipe switching device pressure medium input;
said second pipe switching device (24) adapted to switching the connection of said high pressure conveyor line (20) alternatingly between two outputs (40, 44),
wherein one of said second pipe switching device (24) outputs (40) is connected to a thick matter distributor (10) and the other of said outputs (44) is connected to the reservoir (18) of the pressure medium pump (16) by way of a return feed line (45), and
wherein said second pipe-switching device (24) is adapted to being switched in response to a material change occurring in the incoming material flow.

4 more elements

Dependencies are inferred from the claim text.