Presses – With drain means for expressed liquid – Drainage through or along pressure surface
Patent
1991-04-05
1993-01-05
Hornsby, Harvey C.
Presses
With drain means for expressed liquid
Drainage through or along pressure surface
100118, 100151, 100226, 1341041, 210401, B30B 906, B30B 924
Patent
active
051760738
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase of PCT/DE 90/00724 filed Sep. 25, 1990 and based, in turn, upon German National Application P 3932098.1 filed Sep. 26, 1989.
FIELD OF THE INVENTION
The invention relates to a press for dewatering of a mat of solid matter consisting of goods to be pressed.
BACKGROUND OF THE INVENTION
Dewatering presses disclosed in the German Patent (DE 31 35 651) and including the return means for the lath grate band as well as the return means for the sealing band are mounted on or within a press frame. Furthermore, a means is provided for cleaning of the lath grate band. As a result, the lath grate band and the sealing band can be detached from one another outside press platens. In such the structure the cleaning means operates in the clear space and is usually designed as spray nozzles or the like. The sealing band can also be cleaned in this manner.
For the mesh band, separate cleaning means are provided along the band's recirculating path. The structure has been proven to be successful. However, the apparatus also requires an additional means for cleaning the lath grate band or the sealing band which are part of the dewatering platen press. The use of such additional means for cleaning is not economical.
OBJECTS OF THE INVENTION
It is therefore, the object of the invention to provide the dewatering press improving a cleaning in a simple and economical manner.
SUMMARY OF THE INVENTION
The press according to the invention includes an upper press section and a lower press section, a powered mesh band or sieve band guided through the dewatering press via stationary arrayed drums and receiving the mat of solid matter, an endless lath grate band running on a return means, and an endless sealing band circulating via return means and guided around the lower press section. The interstice between the laths in the lath grate band represents a drain slot through which the water, extruded during the pressing, runs off. The sealing band prevents the water to run off out of control. In order to avoid resting of the solid matter the lath grate band according to the invention is guided through a cleaning basin, which is placed below the dewatering press. The two machine frames can be made as a unitary frame. According to the invention, the cleaning means are not components of the dewatering press but a separate part of the assembly characterized by a simple structure. As a result of the basin, a very effective cleaning can be carried out in a simple manner. For this purpose, the cleaning basin can be filled with a cleaning water. One of the advantages of the present invention is the use of cleaning nozzles and/or cleaning brushes. It is also within the framework of the invention to likewise carry the sealing band through the cleaning basin providing effective cleaning of the former. Further, the mesh band can also be cleaned in the cleaning basin.
Still another advantage of the press according to the invention is the cyclical work of the dewatering press which is a dewatering platen press. It is understood that in this case the lath grate band and the sealing band, during the return motion of the opened dewatering platen press, do not experience disturbing wear effects due to the absence of contact with other machine parts. For this purpose the band may be suitably displaced within the stationary machine frame. In addition, the bands can be aligned exactly at the level of the lower platen press by means of an adjustment mechanism.
Another embodiment according to the invention shows the dewatering press realized as a continuous press operating in a sustained manner.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features and advantages of my invention will become more readily apparent from the following description, reference being made to the accompanying highly diagrammatic drawing in which:
FIG. 1 is a side view of one embodiment of the press according to the invention;
FIG. 1a is an enlarged cross sectional view of the detail
REFERENCES:
patent: 602620 (1898-04-01), Flory et al.
patent: 3459122 (1969-08-01), Pastoors et al.
patent: 3680476 (1972-08-01), Pfeiffer
patent: 3705546 (1972-12-01), Gunkel
patent: 3720159 (1973-03-01), Gunkel
Dubno Herbert
G. Siempelkamp GmbH & Co.
Gerrity Stephen F.
Hornsby Harvey C.
Kateshov Yuri
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