ES2235632B1 - IMPROVEMENTS INTRODUCED IN THE PATENT OF INVENTION 200202909 BY "SYSTEM OF CONTINUOUS EXCAVATION OF WALLS SCREEN". - Google Patents

Abstract

Improvements introduced in the invention patent 200202909 for "Continuous evacuation system of screen walls". The improvements consist in replacing the vertical conveyor in endless circuit of the main patent by an intermediate chamber (6) that participates in the material transport subsystem, chamber (6) of variable volumetry with the collaboration of cylinders (9 '' '' ) and provided with lower gates (7) and upper gates (7 ''), so that during the expansion of said chamber (6) the material penetrates into the chamber through the lower gates (7), which they are open, while in the contraction of said chamber, with the lower doors (7) closed and the upper doors (7 '') open, the material is propelled towards an evacuation tube (8) that ends said chamber (6) and which extends to the surface, achieving the evacuation of the material with an intermittent pumping effect.

Description

Improvements introduced in the invention patent nº 200202909 by: "Continuous wall excavation system screen."

Object of the invention

The present invention relates to a series of improvements introduced in the relative invention patent 200202909 turn to a continuous wall excavation system screen.

The improvements of the invention affect the camera of load of the transport subsystem, equipped with means for expand by receiving the ground extracted by the jaws and that subsequently it contracts to transport to the evacuated land, to the surface, through the evacuation tube.

Background of the invention

In the invention patent 200202909 it is described a continuous excavation system of screen walls, in which a spoon is used whose jaws have a system that drives the material to the ground towards a loading chamber equipped with anti-return gates, where an effect occurs Press-filtering of the material, with the consequent liquid and bentonite sludge removal through walls filters that delimit said chamber of press-filtering, following which there is a Exit section for pressed and liquid-free material and sludge to a continuous conveyor, consisting of a vertical conveyor in endless circuit.

In this way the system allows digging, extract and unload the material on the surface, continuously and without the need to interrupt the excavation to extract said material by moving the jaws to the surface, as conventionally.

Description of the invention

The improvements proposed by the invention allow eliminate the said continuous conveyor in endless circuit, with the consequent structural simplification that this implies.

To do this and more specifically the chamber of load goes on to act simultaneously as a camera press-filtered, and above it is set another camera belonging to the transport subsystem, which expands to receive the ground extracted from the jaws that It is equipped with gates, one for entry and one for exit, so that after filling this loading chamber and inverting the position of the floodgates, closing the lower one and opening the upper, the camera is compressed with the collaboration of cylinders hydraulics that assist it, causing in turn a compression of the material that is projected towards an evacuation tube, superior, in which said chamber ends, and which extends to the the land's surface.

In this way a displacement is achieved pulsating ground extracted by the jaws along the tube of evacuation, without the need for the vertical conveyor in circuit endless of the previous patent.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings where with illustrative and non-limiting nature, what has been represented next:

Figure 1.- Shows a representation schematic side elevation of the structure corresponding to excavation system of the invention, with the bucket in position of the beginning of the excavation.

Figure 2.- Shows a similar representation to the previous figure, at the end of the excavation phase and beginning of the phase of extracting the land from the jaws to the system of transport abroad.

Figure 3.- Shows, again according to a representation similar to the previous figures, the same set at the end of the extraction phase.

Figure 4.- Shows, finally, a new representation similar to the previous figures, but in which the set appears in transport phase from the bucket to Exterior.

Preferred Embodiment of the Invention

In view of the figures outlined you can observe how the screen wall continuous digging system object of the invention, is based on an excavation similar to that of a conventional spoon but with a series of improvements and innovations that allow the extraction of the land to be done in a way compressed and free of bentonite sludge, without having to climb the spoon to the surface.

More specifically, the spoon on which the excavation system object of the invention comprises a support structure (1) that is complemented by elements of guided (2), all as conventional, including jaws (3) whose function is to dig the ground, being able to have any appropriate geometry to effectively comply with the desired function

Well, from these characteristics, a of the improvements of the invention is that inside the bucket is provided a loading chamber (4) equipped with floodgates anti-return (5). Through the vertical movement of  the jaws (3), it is possible to introduce the terrain in the chamber of load (4), where, due to the pressure effect and given its innovative configuration with filter zones, the surplus liquid (water, bentonite and other elements in suspension), thus achieving that the terrain is consolidated and ready for transport.

Simultaneously to the vertical movement of the jaws (3), by effect of the cylinders (9 '), the chamber of load (6) of the transport subsystem expands, by means of cylinders (9``), to receive the ground extracted from them, specifically thanks to the existence in said chamber (6) of a lower or input gate (7), which will be open in said moment, and an exit gate (7 ') which in turn will be closed.

After filling the loading chamber (6) of the transport subsystem, the gates (7-7 ') they reverse their position, that is the lower gate closes and the upper one opens, and the chamber (6) is compressed by transporting the ground through the evacuation tube (8) to the surface.

During the stage of lowering of the jaws the anti-return gates (5) prevent the descent of the existing terrain in the loading chamber (4), allowing the jaw opening for a new excavation cycle and load, while the lower gate (7) of the subsystem of transport (6) closes, preventing the discharge of the evacuation (8).

The repetition of these cycles is driving the Compressed material to the surface.

The excavation, the vertical movement of the jaws (3) and transport subsystem (6) are performed through the action of said hydraulic cylinders (9), (9 '), (9``).

In this way an effect is achieved aspirant-impeller, from the loading chamber (4) to the evacuation tube (8), through said chamber intermediate (6) of the transport subsystem.

Claims (1)

1. Improvements introduced in the invention patent 200202909 for "Continuous evacuation system of screen walls", characterized in that above the chamber (4) defined between the jaws of the excavation bucket and above them, a second is established chamber (6), belonging to the subsystem of transport of the material towards the surface, this chamber being expandable by cylinders (9 '') and incorporating in its ends paths of entry and exit (7-7 '), so that in the filling phase of said chamber (6) the lower gates (7) are open and the upper gates (7 '), while in the discharge phase, in which the contraction of the chamber (6) occurs, the lower gates (7) they close and the upper ones (7 ') open, for displacement of the material housed in said chamber (6) towards an evacuation tube (8) that extends to the surface.