CS239083B1 - Suction mouth for suction dredgers - Google Patents

Abstract

The invention concerns a suction mouth for suction excavators, which is intended mainly for work in a wide range and in a high seam, on shaly soils, which may also be deeply embedded. The essence of the suction mouth, which consists of one or more chambers, is that a screen is continuously and firmly connected to the bottom of the blade, which is overhanging above the nozzle wall, from which auxiliary transport water jets. In this case, the nozzle wall and the bottom of the blade chamber create a nozzle cavity, which is open towards the outlet opening of the chamber. This arrangement increases the efficiency of the suction mouth.

Description

(54)

Suction mouth for suction dredgers

The solution concerns the suction mouth for suction dredgers, which is intended mainly for working in wide and high seams, on certain soils, which can be easily hastened. The essence of the suction mouth, which consists of one or more chambers, is that a diaphragm is connected continuously and firmly to the bottom of the blade, which is overhanging above the nozzle wall, from which auxiliary transport water flows. At the same time olona. the nozzle wall and the bottom of the blade chamber form a nozzle cavity which is open towards the outlet opening of the chamber. This arrangement increases the efficiency of the suction mouth.

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239 083

239 083

The invention relates to a suction mouth for suction dredgers and is intended mainly for working in wide engagement and high seam.

The known suction orifices with a mechanical disconnecting effect on the soil and an internal hydraulic conveying effect on the soil consist of one or more chambers. The soil disengaged by the knife at the inlet opening of the suction mouth proceeds along the knife end to the bottom of the blade, from where it falls along the nozzle wall to the bottom of the chamber where it enters the jet of water flowing from the nozzle wall nozzles and transported further to the outlet opening of the chamber.

The disadvantage of this device is that during the extraction of some types of soil and with a relatively large distance between the nozzles in the nozzle wall, a certain amount of soil accumulates near the nozzle wall, in the wedge between two adjacent spray cones of water. This causes undesirable friction of the water jets from the nozzles on this accumulated soil, which reduces the disintegration and transport ability of the water in the spray cones and can sometimes lead to the nozzles sticking.

These drawbacks are overcome by the suction mouth of the invention, which consists in that a diaphragm is connected continuously and firmly to the bottom of the blade, which overhangs the nozzle wall, the orifice, nozzle wall and chamber bottom forming a nozzle cavity which is open to the outlet opening of the chamber.

The advantage of the device according to the invention is that the soil does not fall from the bottom of the coulter to the bottom of the chamber just along the nozzle wall, but from the bottom of the coulter moves further down the aperture, above the tops of the spray cones and above the former soil accumulations at the bottom of the chamber; larger diameters of the spray cones and smaller or no spaces without the transport effect of the jet of water. This eliminates the accumulation of soil

239 083 at the bottom of the chamber near the nozzle wall;

accumulated soil and eliminates the risk of sticking nozzles

An example according to the invention is shown in the drawings, wherein Fig. 1 is a longitudinal section of the suction mouth and Fig. 2 is a top view of the suction mouth.

The suction mouth is formed by one or more chambers 1. The chamber 1 has an inlet opening 2 in the front, which in its lower part is designed as a knife 3. On the front 8 of the knife 3 is continuously connected the bottom of the blade 2. 12 there is a nozzle wall 11 with nozzles 6, the orifice 12 being hung above the nozzle wall 11. The nozzles 4 are connected to a water distributor 7, which is located below the bottom of the blade 5. The nozzle wall 11 is further connected with the bottom 9 of the chamber 1. in the working position of the suction mouth, it is lower than the bottom of the blade 5 and the orifice 12. Thus, the orifice 12, the nozzle wall 11 and the bottom 9 of the chamber 1 form a nozzle cavity 13 around the nozzles 6. the jet of water thus acts towards the outlet opening 4 of the chamber 1.

The device operates in such a way that the suction mouth is pressed into engagement with the soil which it cuts with a knife. The uncoupled soil moves along the blade end 8 of the chamber 1 into the interior of the chamber 1, proceeds along the bottom of the coulter 5 and along the adjacent orifice plate 12 to its free edge 14. Here the soil falls to the bottom 9 of the chamber 1 and cones 10 which are directed towards the outlet opening 4 and the soil is conveyed in this direction. Since the point of origin of the hydraulic conveying action on the soil is preferably moved further away from the nozzles by the orifice 12 in the sense of the jet of water and the increasing diameter of the spray cone 10, this reduces or completely eliminates 1, which leads to an increase in the efficiency of the suction mouth.

Claims (1)

SUBJECT OF THE INVENTION 239 083 Suction mouth for suction dredgers, consisting of one or more chambers having an outlet opening at the rear and an inlet opening at the front with a knife located at the bottom, which passes into the bottom of the blade, to which a nozzle wall with nozzles and water distributor is connected which is then connected to the bottom of the chamber, characterized in that a diaphragm (12) which is overhung above the nozzle wall (11) is connected continuously and firmly to the bottom of the blade (5), wherein the diaphragm (12), the nozzle wall (11) and the dao (9) of the chamber (Ί) forms a nozzle cavity (13) which is open towards the outlet nlmu of the opening (4) of the chamber (1).