BG63113B1 - Disk submersible body - Google Patents

Abstract

The disk submersible body (10) can be applied in plants for aeration treatment of waste waters. It is produced by simplified technology, preserving its functions, and easy replacement of sectors which are damaged in given cases. Body (10) has a shaft (22) on which multiple circle-like disk (12) are radially fitted consisting of separate disk machined as sectors having the same radius, lock by connection rods (20) parallel to the axis, driven through radially positioned stands (18). Disks (12) by stretching components (16) fitted between them has precisely specified axial distance between them. The adjacent stretching components (16) fitted axially form intermediate spaces in which the individual sector disks (14) are meshed which are always locked between two adjacent, axially positioned, stretching components (16) by a tight connection. 22 claims, 5 figures

Description

Technical field

The invention relates to a disk submersible body with a shaft on which are arranged radially multiple circular, composed of separate sectors with the same radius disks secured by parallel to the axis, passed through radially arranged posts, tensioners, the disks having with the help of inserted between them stretching elements precisely defined axial distance from each other.

Disc submersible bodies are applicable in biological wastewater treatment plants, they are composed of numerous circular disks attached to a common shaft and serve as carriers intended to cover the microorganisms present in the wastewater.

BACKGROUND OF THE INVENTION

The discs of the submersible body are immersed in approximately half of their surface in a pool filled with biodegradable wastewater already cleared of mechanical contaminants. In this case, the two-bearing and motor-driven shaft rotates the submersible disks forming the submersible disc body so that a constantly new portion of the surface of each disc is submerged in the waste water and in contact with oxygen from the surrounding air. Each of the discs of the disk submersible body, therefore, represents the point of contact with the waste water and the surrounding air for the microorganisms stuck thereto.

Due to the large size of the discs, which reach up to three meters or more in diameter, the transport of disc submersible bodies is problematic and often impossible. As a result, submersible discs have been developed with submersible submersible disks, which are easier to handle not only in terms of transport, but also in terms of replacing a submersible disc in the event of damage.

To this end, [1] provides for submersible discs with submersible discs consisting of separate sectors, which overlap at the borders of their sectors and are supported by parallel to the axis, covering the overlapping sections of the disks and extending radially mounting rods. Between their axially adjacent submersible disks are disposable members which keep the submersible disks at a distance so that an intermediate distance is formed between the disks allowing the submerged surface of the disc to be wetted with waste water.

As much as it is appropriate to divide submersible disks into separate sectors, the disadvantage is that the sector disks used must always have precisely projecting openings, ie. special processing of the discs is inevitable. Another disadvantage is that in the event of the need to replace one disk sector on a disk, for example due to damage, all the connecting rods used to strengthen that sector must be removed in order to remove the damaged sector and fit it. the new sector.

It is an object of the invention to provide a disk-immersed body manufactured using simplified technology with retained function and easy replacement of damaged sectors in individual cases.

SUMMARY OF THE INVENTION

The task is solved by creating a disk-immersed body according to the invention by the characteristic features of claim 1 and the other sub-claims, in which further refinements and layouts are given.

According to the present invention, the axially adjacent spreading members form intermediate spaces in which the individual disk sectors engage. For this purpose, the disk sectors are respectively fastened between each of the two axially adjacent proximal stretching members with a power connection.

According to a preferred embodiment of the invention, the expansion members on one front face are provided with axial recesses and on the opposite front side are formed in accordance with the recesses of the hump. This form of the expanding members makes it possible, in the further embodiment of the invention, for the expansion members to have a plug connection with each other, with the recesses accommodating the inserted humps

According to the invention, the expansion members are circularly cylindrical with a diameter of at least 70 mm and a minimum axial thickness of 15 mm. This minimum thickness determines the axial distance between the disk sectors, wherein the recesses formed in the expansion members have a notch depth of 5 mm and the axially shaped ridges have a thickness of at least 6 mm.

Due to the holes falling out of the invention near the edges, it is preferable that the thickness of the sectors constituting the disks be between 1 mm and a maximum of 2.5 mm without damaging the plates, for example as a result of tearing openings. Due to the small thickness of the discs, it is also possible to increase the active surface of the disk submersible unit equipped with them without the need for additional structural measures.

According to another embodiment of the invention, the sector-composed disks are made of plastic, preferably polypropylene.

According to a particularly preferred embodiment of the invention, the disc-bound sectors are made of polypropylene filled with talcum flour, which increases the material stability. This is crucial because this ensures that the retaining (counterbalancing) forces exerted by the stressing tensile elements act on the sectoral disks.

There are no special requirements regarding the material of the tensile elements, but the production of these elements of plastic has proved to be advantageous, preferring to be thermoplastic, which allows them to be produced as injection molded plastic castings.

The tensioners provided for use in the disk submersible body according to the invention are preferably made of corrosion-resistant material, in particular high alloy stainless steel, for example austenitic steel, preferably type 1.4571, is provided as a material for tensioners.

The shaft intended for fixing the submersible disks is made in the form of a hollow shaft with a circular cross section and is made of weldable steel. For securing the radial supports for fixing and guiding the connecting rods, there are provided connecting plates which are evenly distributed along the perimeter of the shaft. and are welded to it.

According to one embodiment of the invention, a number of sector-mounted disks can be combined into one package.

According to another embodiment of the invention, protective stems may be provided along the perimeter of the disks, parallel to the axis of the shaft, which are connected to the radial supports and thus give the disc submersible bodies constituted by separate sectoral disks additional stability. Preferably, the guard stems are made of a tube with a rectangular cross-section.

Another preferred embodiment of the invention is characterized in that the radial supports are secured by polygonal couplings, wherein both the couplings and the protective stems, as well as the radial posts, are made of corrosion-resistant material, preferably of stainless steel.

This, as well as other preferred embodiments and enhancements of the invention are subject to the claims.

The advantage of a disk submersible body is that it is manufactured using simplified technologies with reserved function and easy replacement of damaged sectors in some cases.

Description of the attached figures

In more detail, the invention is illustrated by an exemplary embodiment of the disk immersion device represented in the accompanying drawings, of which:

Figure 1 is a cross-sectional view of a disk submersible body formed by composed of separate disk sectors and joined by radial supports on a hollow shaft;

FIG. 2 is a separate disk sector provided with radial supports;

3 is a longitudinal sectional view of a disk submersible body according to FIG. 1;

FIG. 4 is a longitudinal section of two adjacent extrusion members;

Figure 5 is a front view of a crucifix.

The following indications are used in the figures: 10 disk submersible body; 12 - immerse the disk; 14 - sector disk; 16 is a stretching member; 17 - through hole; 18 - connecting rod; 19 - tightening nut; 20 - radial stand; 22 - hollow shaft; 24 - recess; 26 - hump; 28 - safety stem; 29 - connecting stem; 30 - connection connection; 32 washer.

An exemplary embodiment of the invention

The disk submersible body of FIG. 1 is made up of discs 12, which, as can be seen from FIG. 3, are spaced axially apart from one another and are made up of separate sector discs 14.

The individual sectoral disks 14 border the radial sides face-to-face and are interconnected between the radially disposed expansion members 16, which take up the power-driven disk sectors 14 with each other.

The expansion members 16 have passage openings 17 through which the parallel rods 18, which extend parallel to the longitudinal axis of the disk submersible body, extend into the radial posts 20. The posts 20 are connected to a shaft 22 consisting of a larger diameter pipe and made like a hollow shaft.

The tilting members 16, which are shown in longitudinal section in FIG. 4, have in their front part certain shapes that allow the axially adjacent tilting elements 16 to be connected to each other. For this purpose, one end of the tilting element according to the invention has a recessed recess 24, while on the opposite front face of the extension member 16 is a cam 26 corresponding to the recess 24.

Preferably, the recesses 24 and the humps 26 have an elongated shape so that the relative torsions between our two adjacent members and the extension members connected to each other are excluded. Hence, a symmetrical, semi-circular surface which is substantially larger than that at the narrow ends of the recess 24 and respectively of the cam 26 and which serves as a support surface for the disc sectors 14 is obtained on both sides of the recess 24, respectively. .

This embodiment ensures that the sector disks inserted between adjacent spreading members are supported on the longitudinal side of the cam-shaped cam 16, 26 and thus that they can be loaded with sufficiently large holding (balancing) force.

As can be seen from FIGS. 1, 2 and 3, the radial supports 20 are provided at the same radial distance with the recesses 24 through which said connecting rods 18. The outer ends of the radial supports 20 are positioned for mechanical stabilization of the guard stems 28. , which are connected to the posts 20 by a bolt connection, as is apparent from FIG.

The individual radial supports 20 of a section may be provided with connecting stems 29 arranged parallel to the sector disks 14, i. transverse to the radial posts 20 to stabilize the beam-supported posts 20 from the central tube shaft.

FIG. 3 shows a longitudinal section of a disk submersible body according to the invention, which shows that the radial supports 20 are advantageously screwed onto the connecting plates 30, which are welded to the tube shaft 22.

In addition, the one shown in FIG. 1 is a circular ring 32 washer which is concentrically connected to the tube shaft 22 and is also screwed to the connecting plates. Preferably, the pipe shaft 22 and the connecting plates 30 are made of weldable steel, such as St 52-3 or St 37-2.

FIGS. 3 and 4 illustrate the principle of securing (anchoring) the sector disks 14 with the help of the expansion elements 16. The expansion elements are arranged as pearls on a row to one another on the coordinating connecting rod 18 with the same orientation, so that the humps 26 of one of the expansion members 16 and the corresponding recess 24 of the joints facing the expansion element 16 engage and engage with each other the corresponding sector disk 14. Using screws at the ends of the connecting rod 18, tightening nuts 19 and penetrating atita by the pull rod spacers 16 are wedge into each other, and thus the inserted therebetween segment discs 14.

Application of the invention

Replacing one or more sectorial disks 14 with the help of the fastening according to the invention is extremely easy. It is only necessary to loosen the mentioned and sector-specific tightening nuts 19 in order to obtain sufficient local axial clearance of the expansion members 16 and to allow the corresponding sectorial drive disk 14 radially outwards.

Then, the new sector disk 14 can be inserted in the opposite order in this way. Then only the corresponding tightening nuts need to be tightened again to lock the expansion elements to each other, respectively to the sectoral disks 14.

Generally, any submersible disc separation 12 is possible, but a single division should be provided for each submersible body. It is determined first of all by its size, ie. the larger the diameter of the submersible disk, the more sectors are provided to limit the size of the sectorial disks 12. Thus, it can be envisaged as an even division, preferably a division of 4 or 8 parts, whereby the sectors are 1/4 or 1/8 of the surface of the disk, and even divisions, such as 1/5 or 1/10.

In fact, the division into a larger number of sectors leads to an increase in the number of required radial supports 20, of the connecting rods 18 and of the extension members 16, but this may nonetheless prove more favorable for the whole installation, since the this installation sector drives will always be the same and transport and handling of smaller sizes will be easier.

Compared to the sector washers used so far, the terminal connection according to the invention is a significant facilitation, since the 18 holes required for the connecting rods are eliminated.

This facilitation is a significant advantage of the invention, in particular because, for the flawless installation, the openings in the sector discs must be adjusted exactly to the appropriate distances at which the connecting rods travel. Exact work requires extra work, which means extra installation time and costs.

Another notable feature of the invention relates to the selection of material for the submersible disks 12, respectively, sector disks 14 intended for use in the submersible discs 10 according to the invention.

Since, according to the invention, the sectoral disks 14 are secured solely by means of the clamping members 16 clamped together, the sectoral disks must be made of material of sufficient mechanical resistance to prevent the material of the sectoral disks 14 from being dragged by the compressive force and the loosening of the pre-tensioned (stretched) expansion members 16, respectively, sector disks 14.

For this purpose, the sectoral disks 14 are intended to be manufactured from talc-filled polypropylene flour, which, due to the addition of such flour, has a higher mechanical resistance and thus meets the requirements.

In this selection of the material according to the invention, it is also possible to mount thin-walled sectoral disks 14 having a wall thickness of about 1 to 2 mm in comparison with the traditional technique. Although the material consumption of each disc 12 is thus reduced by 50 to 70%, more submersible discs 12 can be fitted to each disc submersible body 12 than ever before, using thin-walled submersible disks 12 according to the invention. This creates a larger exchange surface, respectively a surface intended for covering, which significantly improves the efficiency of the installation of disk submersibles while maintaining its dimensions.

Claims (5)

Claims 1. A submersible disc body comprising a shaft having radially multiple circular disks consisting of separate sectorally shaped, sector disks of uniform radius, secured by parallel to the axis, passed through radially spaced connecting rods, such as disks through the nesting elements inserted between them are of a precisely defined axial distance with each other, characterized in that the spaced axial distances with each other, characterized in that the axially adjacent extending ones are the elements (16) form slots for engagement of the individual sector disks (14), and the sector disks (14) are always locked between two axially adjacent disposable expansion members (16) with a power connection. Disc-submersible body according to claim 1, characterized in that the spreading members (16) are provided with axial recesses (24) on their front side, and on their opposite front side they are shaped and fitted to the recesses (24). (26). Disk-immersed body according to claim 2, characterized in that the expansion members (16) are plugged together, with the recesses (24) accommodating the cam (26) inserted therein. Disk submersible body according to any one of the preceding claims, characterized in that the spreading members (16) are circularly shaped with a diameter of at least 70 mm and a minimum axial thickness of 15 mm. 5. A submersible body according to any one of the preceding claims, characterized in that the recesses (24) formed in the expansion members (16) have a notch depth of 5 mm. Disk submersible body according to any one of the preceding claims, characterized in that the axially shaped cam (26) has a thickness of at least 6 mm. Disc submersible body according to any one of the preceding claims, characterized in that the thickness of the discs (12) comprising sector discs (14) is at least 1 mm and maximum 2.5 mm. Disk immersion body according to any one of the preceding claims, characterized in that the sectoral disks (14) constituting the disks (12) are made of plastic. Disc submersible body according to any one of the preceding claims, characterized in that the component discs (12) of the sector discs (14) are made of polypropylene plates. Disk immersion body according to any one of the preceding claims, characterized in that the expansion members (16) are made of plastic. Disc sinking body according to claim 10, characterized in that the expansion members (16) are manufactured as injection molded plastic castings. 12. A submersible body according to any one of the preceding claims, characterized in that the connecting rods (18) are made of corrosion-resistant material. 13. Immersion body according to claim 12, characterized in that high alloy stainless steel is provided for the connecting rod material (18). 14. A disc-sinking body according to claim 13, characterized in that the connecting rods (18) are made of austenitic steel, for example type 1.4571. Disc-sinking body according to any one of the preceding claims, characterized in that the shaft (22) is formed as a hollow shaft with a circular or polygonal cross-section. 16. A submersible disc body according to claim 15, characterized in that the shaft (22) is made of weldable steel and that there are uniformly spaced joints for the radial supports (20) along its perimeter. Disc-sinking body according to any one of the preceding claims, characterized in that a number of discs (12) formed by sectors (14) are bundled. Disc-sinking body according to any one of the preceding claims, characterized in that along the perimeter of the disks (12) there are provided protective shafts (28) running parallel to the longitudinal axis of the shaft, which are connected to radial supports (20). 19. The disk submersible body according to claim 18, characterized in that the guard stems (28) are made of a tube with a rectangular cross-section. Disk submersible body according to any one of the preceding claims, characterized in that the radial supports (20) are secured by means of polygonal connecting stems (29). 21. A submersible body according to any one of claims 18 to 20, characterized in that the safety stems (28), the connecting stems (29) and the radial supports (20) are made of corrosion-resistant material, preferably stainless steel . Disc blade body according to one of the preceding claims, characterized in that each sector disk (14) is made of polypropylene filled with talcum flour.