NL9001055A - Liquid manure pits covering - is fitted between top rim of pit and grid floor, and periodically flushed - Google Patents

Abstract

The cover plates for liquid manure pits are of thermally insulated sandwich construction, and fit between the top rim of the pit wall (2) and a grid floor (13). The cover plates have a reversed pyramid shaped centre part (9) with a vertical discharge pipe (10), which reaches nearly to the bottom (8) of the manure pit (3). A central flushing arrangement periodically clears the plate (1) and bottom of grid floor (13).

Description

Dri.i f fertilizer cover plates.

The invention relates to slurry cover plates which serve to cover slurry cellars of stables, which are equipped with a slatted floor, in order to prevent the gases generated in the floating nest from entering the stable space. The construction consists of a cover plate which is provided with a manure collection section with a discharge pipe that extends close to the basement floor. The cover plate is placed between the top of the basement wall and the grille. In the I discharge tube there is a spraying device that periodically rinses the collection section. Because the plates rest on the walls of the basement and connect to each other, almost all gases generated in the manure are kept in the basement.

• It is usual to provide stables with a slatted floor with slurry cellars in which the manure is collected. These slurry cellars were periodically pumped empty and the manure is processed in one way or another. A problem here is the development of various gases in the slurry. These gases enter the stable floor I through the slatted floor. The discharge of these gases, including ammonia, methane and carbon dioxide, is carried out using the forced house ventilation. In most cases, the air used for barn ventilation must be heated. When the amount of unwanted gases can be limited in the stable space, the required quantity! fresh air is also reduced, thereby greatly limiting the energy required. It is also important to capture ammonia and methane as these gases are valuable and at the same time harmful to the environment. With the slurry cover plates it is possible to cover existing slurry cellars and to collect and process the gases and thereby minimize the amount of undesired gases in the house.

It is known in the art to cover the slurry in the basement with floating elements, however this system can only capture part of the gases. In addition, a fairly large amount of manure can remain on the floating elements and still develop gases that can enter the stable space.

The invention solves these problems by providing a slurry cover plate covering the cellar and collecting the manure coming through the grid and discharging it through a tube into the cellar. A spraying device periodically rinses the bottom of the grate, the collection area and the discharge pipe, which minimizes the amount of fresh manure in the house. Periodic rinsing will also ensure good drainage of the manure to the basement.

The invention is now discussed on the basis of the drawing.

Fig. 1 shows an overview of a stable floor with slurry cellar.

Fig. 2 shows a longitudinal section with insulated cover plates.

<1> denotes the slurry cover plate which is placed on the top edge of the wall (2) of the slurry cellar (3) with the level of the slurry (4). The lowest level is indicated at (5). The drain pipe (6) with the bottom end (7) reaches a small distance from the bottom (8) of the basement (3). The slurry cover plate (1) is provided with a short vertical tube (10) in the center of the inverted approximately pyramidal part (9). The drain pipe (6) fits around this pipe (10). The length of the drain pipe (6) can easily be adjusted to the depth of the basement (3). A continuous tube (11) is fixedly connected in the discharge pipe (6). A vertical spray pipe (12) is fixed to this pipe (11) in the center of the discharge pipe (6). This spray pipe (12) extends close to the bottom end of the discharge pipe (6) and upwards close to the grate floor (13). At the top end of the spray pipe (12) a sprinkler (14) is attached which can rinse the underside of the slatted floor (13) and at the same time brings the fresh manure in the pyramid-shaped part (9) to the discharge pipe (6). The rinsing opening at the bottom of the spray pipe (12) rinses the manure in the slurry cellar (3).

The flushing water is supplied by means of pipes that are connected to the pipe pieces (11) with couplings (16).

The slurry cover plates (1) are provided on one side with an offset edge (17) which interacts flush with the flat edge (18) of the adjacent slurry cover plate (1). Strips (19) are used to obtain a flat support for the slatted floor. It is also possible to countersink the connection (17) - (18), whereby the strips (19) are then omitted. The overlapping of the slurry cover plates makes it possible to compensate for small dimensional deviations.

If the slurry cellar (3) is used for manure fermentation or if it is necessary to keep it cool, the slurry cover plate (1) can be provided with a layer of insulating material (20), which is enclosed with a resistant layer (21). As a result, the cooling of the stable space can be further limited. With manure fermentation, a temperature in the slurry cellar (3) can be maintained that is independent of the temperature in the stable space.

The simple shape of the slurry cover plate components makes it possible to make them from the most suitable materials such as plastics or from galvanized sheet. The construction can easily be used in existing stables, with which a significant improvement in the quality of the extracted ventilation air can be realized.

Claims (1)

Slurry cover plates according to claims 1, 2 and 3, characterized in that the slurry cover plates (1) are provided on one side with an offset edge (17) with which the flat edge (18) of the next slurry cover plate (1) fits.