SK126298A3 - Aeration means for a tank filled with liquid - Google Patents

Abstract

The invention relates to aeration means for a tank filled with liquid. Said means has an air supply line (5) which runs into an air diffuser (2) to which distribution lines (4) for supplying of air to the tank are connected, gaps being arranged vertically between said distribution lines (4), the opposing ends thereof being fastened to a rear cross beam (3). The air diffuser (2) and the rear cross beam (3) are connected to each other by a connection beam (1) which forms a hollow tube arranged between the distribution lines (4). The connection beam (1) is arranged symmetrically in relation to the distribution lines, and its interior is separated from the inner chambers of the diffuser (2) and the rear cross beam (3). The inner chamber of the air diffuser (2) is connected to the inner chamber of the rear cross beam (3) by the distribution lines (4). The frame of the means is provided with the upper section (12") of at least one stabiliser (12), the lower section thereof being fastened to the tank floor.

Description

Device for aerating the liquid tank

Technical field

BACKGROUND OF THE INVENTION The invention relates to a device for aerating a liquid tank comprising an air supply line leading to a manifold, to which air distribution pipes are connected to the liquid tank, between which there are vertical gaps in the vertical direction and which are fixed at the opposite end wherein the distributor and the rear cross member are interconnected by the longitudinal connecting beams with which they form the frame of the device.

BACKGROUND OF THE INVENTION Point of attachment to perforated

The devices for aerating the liquid tanks comprise distribution tubes, e.g. in the form of perforated hoses through which air is supplied to the tank. The distribution pipes are mounted in the frame of the aeration device and run side by side along the bottom of the tank. The frame is formed by a horizontally arranged manifold into which the air supply duct, the rear cross member and the longitudinal connecting beams are fixed, which are fixed on one side to the distributor and on the other side to the rear cross member. The inner space of the distributor in the form of a cylindrical tube is connected to the inner space of the individual distribution tubes. The inner space of the manifolds is terminated at opposite ends in the rear cross member. The distribution tubes are all along their length and along the entire circumference.

There is thus a relatively intense aeration of the liquid both above the aeration device and partly in the region of the bottom of the tank, as long as the distribution pipes are at a sufficient height above the bottom. This is achieved by arranging the seating sockets attached to the frame of the device.

If these aeration devices are used in flowing or forced-circulation waters, their design has the disadvantage of increasing the water flow resistance by bypassing the flat rear crossbar or lateral longitudinal beams of the frame, which in turn leads to a decrease in aeration intensity and increased energy consumption. water circulation.

There are also known designs of aeration devices whose frame is formed by two strips of plastic material. The two strips are welded on top of each other except for the perforated portions forming the aeration tubes and the tubular portions through which the support cables, which also serve as a load, pass.

However, these aeration devices are applicable to smaller aeration devices and are unsuitable for use at the bottom of the tank due to the restriction of air passage from the space between the bottom and the aeration device to the entire tank space.

When using known aeration devices, especially in tanks with running water, they are swiveled or carried away from their installation at the bottom of the tank. To stabilize the installation of the device at the bottom of the tank, towing ropes are therefore used to lift and lower the device from the bottom or at the bottom of the tank, by means of which the device is pushed through the sockets. These measures contribute to the stabilization of the device in only one direction, while in a direction perpendicular to it, which is the direction of fluid flow, they are relatively ineffective.

It is an object of the present invention to design an aeration device that achieves high aeration rates in both upright and flowing liquid tanks, while being easily applicable to different aeration sizes and capacities while allowing stable installation at the bottom of the flowing liquid tank.

on the bottom of the tank, connected to the bottom

SUMMARY OF THE INVENTION

The principle of the aeration device according to the invention consists in that the connecting beam, which is a part of the frame, is at least one fixed strut extending between the distribution tubes. The connecting beam is preferably a hollow tube of cylindrical cross section extending symmetrically between the distribution pipes and separated by its interior from the interior of the rear cross member and the distributor. A reinforcing member is provided within the joining beam, the outer edges of which bear against the inner surface of the joining beam. The distributor and the rear cross member are of cylindrical cross-section and their internal spaces are interconnected by means of distribution tubes. Cross beams are attached to the connecting beam, through which the distribution tubes pass. The frame is provided with an upper part of at least one stabilizer, the lower part of which is fixed to the bottom of the tank. The upper portion is formed by at least one side portion connected to the connecting bridge, the side portion having a support surface disposed opposite the support surface of the lower portion. Optionally, the upper portion is formed by one plate provided with at least one support surface disposed opposite the support surface of the lower portion. The lower part of the stabilizer extends through a traction cable, the end of which is attached to the upper part. At its exit from the bottom of the stabilizer, the tow cable is routed through the protective tube.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings show schematically the aeration device according to the invention, wherein FIG. 1 shows a plan view of the device, FIG. 2 shows a side view of the device according to FIG. 1, FIG. 3 shows a partial longitudinal section through the apparatus of FIG. 1, FIG. 4 is a partial cross-sectional view of the apparatus of FIG. 1, FIG. 5 shows an alternative embodiment of an aeration device, FIG. 6 shows a cross-section A-A of the apparatus of FIG. 5, FIG. 7 shows schematically another alternative embodiment of the aeration device, FIG. Fig. 8 shows a partial cross-section of a device with a reinforcing element; 9 shows a partial longitudinal section through a stabilizer device, FIG. 10 shows a section B-B of the device of FIG. 9, FIG. Fig. 11 shows a partial cross-section of a device with an alternative embodiment of a stabilizer; 12 shows the embodiment of FIG. 5 with an alternative location of the stabilizer; FIG. 13 is a side sectional view of the device of FIG. FIG. 16 shows devices with a trigger arrangement arranged on both sides, and FIG.

shows a side view of the device of FIG. 16th

12, FIG. 14 shows 12, FIG. 15 shows an alternative embodiment with a one-sided trigger

DETAILED DESCRIPTION OF THE INVENTION

The distribution pipes 4, formed by diaphragm hoses perforated all around and over their entire length, are connected to the distributor 2 and the opposite ends to the rear cross member 3. Both the distributor 2 and the rear cross member 2 are formed by cylindrical tubes whose internal spaces are interconnected by distributing The hollow rear cross member 3 and its connection to the manifold 2 serve to equalize the pressure in the hose assembly, resulting in more even aeration over their entire length. The air supply duct 5 flows into the distributor 2. The distributor 2 and the rear cross member 3 are fixed to each other by means of at least one connecting beam 2 arranged substantially perpendicular to the distributor 2. The connecting beam 2 is also formed by a cylindrical tube and extends between the distribution tubes 4. Preferably the connecting beam is one and arranged symmetrically with respect to all the distribution pipes 4, so that together with the distributor 2 and the rear cross member 2 they form the backbone of the aeration device. The inner space of the connecting beam 1 is separated from the inner space of the distributor 2 and the rear cross member 3. The backbone construction ensures simple and quick assembly of the entire aeration device, while using cylindrical tubes on all parts of the frame allows improved bypassing of the whole device. lateral direction. The basic strength of the aeration device can be strengthened with respect to the construction length by inserting a reinforcing member 11 into the interior of the connecting beam 1, thereby not adversely affecting the by-pass of the device with liquid. The stiffening member 11 abuts with its outer edges on the inner surface of the joining beam 2. The distribution tubes 4 pass between the distributor 2 and the rear crossbeam 2 through holes in the crossbars 6. which are fixed to the joining beam 2. Preferably the crossbars 6 are made of plastic. their rounded shape and very smooth surface in all cross-sections contribute to improving the liquid by-pass of the device. The frame is provided with sockets 7, which are attached to the sides of the distributor 2 and the rear cross member 3 and serve to adjust the device to the bottom of the tank.

The connecting beam 2 in the form of a cylindrical tube can advantageously be used for connection with the tow rope 8 (Fig. 4) for pulling the aeration device on the bottom of the tank, its mass together with the material which can be placed in its interior load equipment. In FIG. 6, the inner space of the connecting beam X is filled with bulk material 9, e.g. It is also possible to use a liquid which is pumped from the interior of the connecting beam X before lifting the aeration device from the tank, as a load in the interior of the connecting beam X.

The symmetrical arrangement of the connecting beam 1 thus allows the entire device to be balanced without over-tilting, thereby also allowing the frame to be easily attached by means of the connecting beam X to the tank holding elements.

The design of the aeration device also allows its easy applicability in circular tanks, where the spacing of the connection of the distribution pipes 4 to the distributor 2 may be different from the spacing of the connection of the distribution pipes 4 to the rear cross member 3 (Fig. 7).

As shown in FIG. 9, the upper part 12 * * of the stabilizer 12 is fixed to the distributor 2, the lower part 12 'of which is fixed to the bottom of the tank. The upper part 12 '' consists of two lateral parts 14 which are welded perpendicular to the axis of the distributor 2 and connected together by means of a jumper 15. The jumper 15 is situated above the lower part 12 'and serves to grip the lower end of the tow rope 8 by means. screw joint. The traction cable of the clay serves to lift and lower the device from and to the tank, passing through the guide arranged at the bottom 12 'and, as it exits from this guide, goes up, out of the tank. The side portions 14 are provided with abutment surfaces 16 which are opposed to opposite abutment surfaces arranged at the bottom 12 '. With this arrangement, the device is stabilized in a direction perpendicular to the axis of the distribution tubes 4. Depending on the flow direction of the liquid in the tank, one of the two pairs of support surfaces always abuts one another. It is also possible to seat all the support surfaces of both pairs simultaneously. The towing rope 8 is, after leaving the stabilizer 12, passed through a protective tube XX which prevents it from being coated with impurities which, when seated on the towing rope 8, would prevent it from passing through the lower part 12 * of the stabilizer 12. is it possible by its movement in the direction of the axis of the tow rope č?

loosen any dirt.

As shown in FIG. 11, it is possible to form a stabilizer 12 in the region of the connecting beam X, whereby its upper portion 12 * * can be formed in one piece welded perpendicular to the connecting beam X, which extends parallel or perpendicular to the distribution tube 4.

The number and distribution of the stabilizers 12 on the frame of the device is dependent on the fluid flow ratios in the tank, whereby it is possible to use their stabilizing function not only in the flow direction of the liquid, but also in the direction perpendicular thereto or in some other directions. The stabilizers 12 can also be used in the function of the sockets 7 to adjust the device to the bottom of the tank, both individually and in combination with the sockets 7 with respect to the flexibility of the frame of the device.

Claims (10)

PATENT CLAIMS 1. A device for aerating a liquid tank, comprising an air supply line leading to a manifold to which the air distributor tubes for the liquid tank are connected, with vertical gaps in the vertical direction and fixed at the opposite end to the rear a cross-member, the splitter and the rear cross-member being interconnected by the longitudinal connecting beams with which they form the frame of the device, characterized in that the connecting beam (1) which is part of the frame is at least one fixed strut extending between the distribution tubes (4). Liquid tank aeration device according to claim 1, characterized in that the connecting beam (1) is a hollow cylindrical cross-section extending symmetrically between the distribution pipes (4) and separated by its interior from the interior of the rear cross member (3) and the distributor. (2). A device for aerating a liquid tank according to claim 1 and 2, characterized in that a reinforcing member (11) is provided within the connecting beam (1), the outer edges of which bear against the inner surface of the connecting beam (1). Liquid tank aeration device according to claims 1 to 3, characterized in that the distributor (2) and the rear cross member (3) are of cylindrical cross-section and their internal spaces are connected by means of distribution pipes (4). A device for aerating a liquid tank according to claims 1 to 4, characterized in that cross members (6) are attached to the connecting beam (1) through which the distribution tubes (4) pass. The apparatus for aerating a liquid tank according to claim 1 to 5, characterized in that the frame is provided with an upper part (12 '') of at least one stabilizer (12) whose lower part (12 '') is fixed to the bottom of the tank. Liquid tank aeration device according to claims 1 to 6, characterized in that the top part (12 '') is formed by at least one side part (14) connected to the connecting bridge (15), the side part (14) being provided with a support surface (16) disposed opposite the support surface of the bottom (12 '). The apparatus for aerating a liquid tank according to claim 1 to 6, characterized in that the upper part (12 '') is formed by a single plate provided with at least one support surface (16) arranged opposite the support surface of the lower part (12 '). Apparatus for aerating a liquid tank according to claims 1 to 8, characterized in that the lower part (12 ´) of the stabilizer (12) extends through a traction cable (8), the end of which is attached to the upper part (12 ´). Device for aerating a liquid tank according to claim 9, characterized in that the pulling cable (8) is passed through the protective tube (13) at its outlet from the lower part (12 ').