HU202608B - Apparatus for removing lumpy floating contaminations from sewage - Google Patents

Abstract

The device has a curved grid built into a grid cabinet (1) (5) is a floating, solid, dirt-free dirt, for example garbage, drift, etc. survives, sewage and - further subjected to further cleaning. A litter mechanism (3) is removed from the grid (5) to catch the garbage that has been caught with a comb (20) it is flexibly tensioned and downward movement the comb (20) can be turned out of the grid rods, a it can be turned back to its operating position for upward movement. Thanks to the elastic tension of the comb (20) he turns out of the bars if he is too big or, and / or, with a trash piece tensioned between the bars, then leaving the obstacle returns to operating position. (Figure 1)

Description

The present invention relates to an apparatus for removing pieces of floating impurities from waste water.

It is known that in wastewater treatment plants or installations the first purification unit is a trash grid, which retains larger pieces of dirt. Wire gratings placed in the sewerage path, according to the technological requirements, can be flat or curved grids and are fixed. While grid cleaning and grid removal, especially on smaller sites, has previously been done manually, however, machine grid cleaning and deburring have become more prevalent, which was common in larger sites. However, purifiers for such large grids require a lot of space, require considerable manufacturing experience and sophisticated technological equipment, are complex in structure, require special expertise to repair and maintain.

In the case of especially smaller sewage treatment plants, the cleaning of widespread curved grids (arc grilles) is carried out by means of a fixed comb moving in a circular path, if it is not done manually. The arc grille passes through a straight section flush with the bottom of an art object such as a cupboard, with the disadvantage that the litter that arrives with sewage is arranged in a lattice direction and that a substantial part of it flows between the comb teeth along with flowing sewage; this means that the mud trap is not or only partially capable of performing its function. A further disadvantage is that the comb is very sensitive; Large pieces of rubbish, especially when trapped between grid bars, can cause tooth tolerance, engine burns, or other machine failure.

It is an object of the present invention to provide a grid trap for wastewater treatment with a low installation and operating cost, simple construction and handling, maximum operational safety, fault-tolerant installation in existing and new wastewater treatment plants.

The present invention is based on the discovery that when using a comb-moving comb that is parallel to the longitudinal direction of the lattice and which, by its elastic pre-tension and articulated attachment, can deflect larger debris pieces and configured to hold the comb between the bars of the grid as it moves upward, but moving downwards outside the bars, the possibility of failure is practically excluded. It is further recognized that the method of operation of the comb described above can be rationally provided by means of articulated rod mechanisms and linear actuators, preferably pneumatic or hydraulic cylinders.

Based on these findings, the object of the present invention has been solved by means of an apparatus having a grid at least partially enclosed, preferably in a grid; an opening for supplying the wastewater to be treated, an opening for discharging wastewater and for removing contaminated lumps in the confined space, and an actuating mechanism having a comb mechanism, and having a comb mechanism, it is connected to its rigid support structure in and out of the lattice sticks, and the comb is resiliently tensioned in its operating position between the lattice sticks; preferably the support structure of the trash removal mechanism is a support frame. In an exemplary embodiment, the comb is hinged to the grid end of the tension bar attached to the support structure of the debris removal mechanism and to the holding device, while a tension member is connected to the other end of the tension bar. Preferably, the tension member comprises a spring mechanism or a hydraulic or pneumatic cylinder.

According to a further feature of the invention, the comb has an arm perpendicular to the plane of the teeth and is hinged to the outer end of the tension bar while the hinges joining the comb to the support structure are located above the hinge end of this rigid arm. It may also be advantageous if the support structure and the tension bar are connected by means of a connecting arm which is hinged to both the support structure and the tension bar.

Another advantageous embodiment of the apparatus is characterized in that it has a curved grid which is connected to the bottom plate of the grid receiving space, e.g. a grid cabinet, with a starting angle of 20-80 °, preferably about 40 ", and is movable up and down about an axis. The axis is preferably the geometric center of the arc. in the case of a curved lattice, the apparatus preferably has a garbage disposal device having a swiveling sliding mechanism which is pivotable in space about an axis extending over the lattice, with an outer end along the upper end of the lattice and an upwardly movable sliding blade; and connected to the upper end of the grid by an obliquely downwardly extending guide which is guided through or fits in the opening for discharging trapped debris; in this case, it is expedient that the sliding plate is fixed to the frame.

Finally, according to another aspect of the invention, the actuator of the debris removal mechanism is preferably a hydraulic or pneumatic cylinder, the piston rod of which is connected to the support or to the shaft by means of an actuator.

The invention will now be described in more detail with reference to the accompanying drawings, which show preferred embodiments of the apparatus and some structural details.

In the drawings, Figure 1 is a side elevational view of the apparatus;

Figure 2 is a plan view of an embodiment of the apparatus;

Figure 3 is a sectional view taken along line A-A in Figure 2.

The apparatus of Fig. 1, for example, has a steel plate closed grid 1 with a feed opening 21 for the raw sewage outlet at one end and two outlet openings 22,23 at the other end; an outlet 22 serves to discharge filtered wastewater and an outlet 23 to discharge trapped litter. The 21st

EN 202608 Β Inlet opening can be opened, closed by means of 2 closing devices movable up and down.

For example, the lattice cabinet 1 has an arcuate lattice 5 made of flat iron bars with its lower end fitting to the bottom plate of the lattice cabinet 1 near the outlet 22 on the inlet side 21. The grid 5 is concave in the direction of the flow of waste water indicated by the arrow h. The projection height H of the grid 5 is greater than the height of the waste water level v.

In front of the grid 5 (in the direction of flow h) there is arranged a debris removal mechanism, denoted as a whole by reference numeral 3, to the end of which a comb 20 is fitted between the rods of the grid 5. The squeegee mechanism 3 has a support frame 26 and a tension rod 12 which comprises a tension member 18 formed by a spring structure in the embodiment of Fig. 1.

Said comb 20 is connected by means of hinges 10 and 11 to the support frame 26 and tension rod 12 and is actuated by the tension member 18 to be rotatable and reciprocal of the bars 5 and, as will be described later, the tension member 18 allows the elastic deflection of the comb 20 when traveling upward or colliding with a piece of debris trapped between the rods of the grid 5. The deburring mechanism 3 can be rotated about the axis 9 in accordance with the double arrow i; the trajectory of the comb 20 is illustrated by this double arrow.

Connected to the upper end of the curved lattice 5 is an oblique debris slider 6 having a slope opposite to that of the lattice, the lower end of which is fitted to the outlet 23. The debris scraper is formed by a solid sheet or wall, so that behind it is anhydrous space above the opening 23. In the upper area of the debris scraper 6 is mounted a debris ejector 4 which can be moved in a curved path around the axis 16 according to the / double arrow and cooperates with the debris removal mechanism 3 as described below.

The U-shaped grid bypass 7 is located outside the grid 1 and at one end extends downstream of the curved grid 5 and at the other end behind the grid 5 into the grid 1.

The actuator 8, which in the present embodiment is constituted by a hydraulic or pneumatic cylinder, serves to move the squeezing mechanism 3 on the curved path of the double arrow. To its pivotable pivot bar, which is movable according to arrow d, there is an articulated link 19 which is secured at its other end to the shaft 9 mentioned, for example, wedged to the shaft. A stop 24 is provided at the bottom, and a stop 25 is provided at the upper to limit the movement of the squeegee mechanism 3.

The apparatus of Figure 1 operates as follows:

the raw sewage coming from the pressure line, naturally with the open position of the shut-off device 2, flows through the inlet 21 into the grid 1 in accordance with the arrow and flows along the curved grid 5 along the h in the direction of arrow h. The trash remains on the grid 5 and the filtered waste water is gravitationally discharged from the grid 1 through the opening 22 behind the grid in the direction of arrow b.

The actuator 8 for actuating the collector mechanism 3 is actuated by means of feed air or oil; the structure starts automatically and stops automatically when the supply air or pressurized oil is closed. The supporting frame 26 and the tension rod 12 together with the comb 20 make an alternate movement between the lower and upper end points of the curved grid 5 (indicated by dashed lines in the lower and upper end positions in FIG. 1) according to this double arrow. This movement is caused by the actuator and the lever (d arrows); alternating movement of the cylinder 8 during operation between two end positions is controlled by limit switches (not shown) and check valves.

As the comb 20 moves upward, its teeth fit between the bars of the grid 5, i.e. the comb moves between the bars and carries the trash caught by the grate. The semi-skidding device 4, which can move about the axis 16 in a curved path according to the double arrow f, has a lower end position in which its outer end occupies a position, preferably directly below the upper end of the grid 5, when the comb position has not yet been reached while moving up. When the comb 20 advances upwardly against the deburring device 4, it is pushed forward by itself, and at the common upper end of the grid and debris scraper 6, the debris deflector 4 feeds the debris hopper 6 at the end of its movement with the comb 20 enters the opening 23 and passes through the lattice cabinet 1, corresponding to the arrow c. As the debris removal mechanism 3 moves downward, the debris ejection device 4, under its own weight, follows this movement and returns to its lower end position; its movement is limited by a stop (not shown). Otherwise, in Figure 1, the debris ejector 4 is shown in its upper end, which delivers the debris to the carriage 6.

At the upper end point, the comb 20, which is pivotable upwardly around the pin 10, is tipped by the tension member 18 from its position between the bars and held in this tilted position while the debris removal mechanism 3 moves downwardly, i.e. it does not pull out debris. At the lower end of the grid 5, the tension member 18 then tilts the comb 20 to its position between the grid bars and, during the next upward movement period, the comb again removes debris from the grid as described above.

The comb can be tilted at the upper end point by means of a pin (not shown) and, during downward movement, by a cleaning comb (which can be held in this position, e.g. by proper operation of the tension member 18), before another lower position (not shown). ) tap can be tilted back between the bars and the cleaning cycle can start again.

If the comb 20 is facing upwards and / or if it encounters a piece or pieces of debris trapped between the barbs, the biasing member 18 will deflect around the hinge 10 as it will be ejected, since the biasing member 18 will hold the comb flexibly . After overcoming the obstacle, the tension member 18 then forces the comb 20 back into its normal position, that is, between the bars.

The collector mechanism 3 - the comb 20, of course - is only operable when the

A pump for feeding wastewater through the orifice 21 to the grid 1 also operates.

THE 2. 3 and 3, the embodiment of the device is slightly different from that of FIG. 1, in greater detail, and the components already described are denoted by the reference numerals already used in FIG. 1 and the reference letters are used as appropriate.

The support frame 26 of the debris removal mechanism 3 is in this case formed by the longitudinal supports 26a, 26b and the cross stiffeners 26c, 26d and the whole frame can be rotated about the axis 9 (eu). At the outer end of the frame structure 26, the hinges 10a (indicated by a dotted line in FIG. 2) are connected to the longitudinal brackets 26a, 26b, around which the comb 20 can be rotated in accordance with arrow k in FIG. and can be turned back and forth. The comb 20 has a lever 27 perpendicular to its longitudinal direction (rigidly connected to the comb), the end of which is connected to the outer end of the tension rod 12 by a joint 11. As shown in Fig. 2, the tension bar 12 extends in the middle (in the vertical geometric center plane of the grid 5), where the cylindrical member constituting the actuator 8 is also inclined. The piston rod 8a of the latter is connected to the frame 26 by its outer end by means of a joint 13, in particular by its cross-brace 26d, which extends for approx. in the upper third. The upper end of the actuator cylinder 8b of the actuator 8, in turn, is pivotally connected to the shaft 29.

As shown in Fig. 3, a tension rod 12 is connected to the frame structure 26 by means of a linking arm 15 and hinges 14a, 14b, the upper end of which is joined by a clamping member 18 formed by a hydraulic or pneumatic cylinder. The latter is also hinged to the bracket bracket 30 with its upper end, which bracket is rigidly attached to the frame structure 26. The lower end of the tension rod 12 is connected at the lower end 27 with a hinge (Fig. 3).

In the whole embodiment of this embodiment, the waste disposal device 4 is formed by a frame 4a that can be pivotally rotated about the axis 16 and a shutter plate 4b attached to its outer end. On the underside of the frame there is a stop 28 which engages with the support frame 26 of the debris removal mechanism 3 when it reaches up to the debris removal device 4.

Referring now to FIG. 2, the gear unit is also depicted and designated 17.

As shown in Figure 3, the arcuate grid 5 is not connected to the bottom plate of the grid chamber 1 by a horizontal section, as is conventional in prior art solutions, but has a starting angle (tangent angle) of 20-50 °, preferably about 40. *. As a result, debris coming from sewage does not "settle" and the comb can remove it from the grid with maximum efficiency.

The operation of the apparatus of Figs. 2 and 3 is substantially the same as that of Fig. 1: the actuator 8 keeps the debris removal mechanism 3 in an alternating motion on the curved path indicated by this double arrow. As the frame structure 26 moves upward, the teeth of the comb 20 are inserted between the rods of the curved grid 5, pushing up the trash from the sewage with the grid. Frame hand 26 pushes it up against itself against frame 4a of trowel 4, and at the upper end of grid 5, slider 4b pushes trash accumulated on grid 5 to arrow 6 in accordance with arrow c. The upwardly moving comb 20 is elastically tensioned by the cylinder 18 in its position as shown in Figure 3, so that when the comb strikes a larger or / and trapped debris piece, it rotates rearwardly around the hinges 10 against the resilient force of the cylinder 18. , then leaving the obstacle forces the cylinder to return to operating position.

When the deburring mechanism 3 reaches the intended upper point of its path, the actuator 8 is reversed, i.e. the piston rod 8a is pushed out and the deburring mechanism 3 is forced downwardly; while changing the direction of movement while retracting the piston rod of the cylinder 18, the comb 20 is rotated out of the bars and held in this position until the mechanism 3 moves downward. At the intended lower end of the path (e), the actuator 8 is again actuated in the reverse sense, that is, the piston rod 8a is retracted, whereby the mechanism 3 will move upward, thus initiating the previously described garbage catching cycle. At the same time as the operating direction of the device 8 is changed, the comb 20 is reciprocated between the bars and retracted again by proper operation of the cylinder 18.

The operation of the apparatus of Figures 2 and 3 described above is preferably carried out automatically.

Advantageous effects of the invention may be summarized as follows:

the device according to the invention can also be operated in low load ranges, which at present usually only involve manual trash removal. The risk of injury to the comb is completely eliminated. The equipment can be easily modified to meet changing technology needs, as the wedge width can be changed by replacing the grille and cleaning comb at minimal cost. The plant is highly automated and requires no supervision. The cleaning speed can be set according to technological requirements. The apparatus is simple and thus achievable with relatively modest production capacity; the need for repair and maintenance is low. The curved design of the lattice is such that there is no risk of the former "settling" of the litter and passing through the lattice. When the raw sewage arrives via a discharge line, both the sewage and the litter can be gravitationally transferred when the grid is installed high. The equipment can also be adapted as a treatment plant for existing wastewater treatment plants without significant additional (construction) costs.

The invention is, of course, not limited to the examples detailed above, but may be practiced in various ways within the scope of the claims, for example in the case of a flat grid.

Claims (11)

PATENT CLAIMS Apparatus for removing pieces of floating impurities from waste water, the equipment of which is at least partially enclosed, preferably in a lattice cabinet EN 202 608 Β a grille, an opening for the discharge of wastewater to be treated in the enclosure, an outlet for the discharge of wastewater and the removal of trapped litter, and a trap with a comb mechanism attached to the actuator, the comb (20) is connected to the rigid support structure of the debris removal mechanism (3) to allow it to be rotated and rotated from the rods (5), and the comb (20) is elastically tensioned in its operating position between the rods. Apparatus according to claim 1, characterized in that the support structure of the debris removal mechanism (3) comprises a support frame (26). (Figures 2 and 3) Apparatus according to claim 1 or 2, characterized in that the comb (20) is provided with hinges (10,11) at the end (5) of the tension bar (12) connected to the support device (26) of the debris removal mechanism and to the support device. engaged while a tension member (18) is connected to the other end of the tension rod (12). (Figures 1-3) Apparatus according to claim 3, characterized in that the tension member (18) comprises a spring structure. (Figure 1) Apparatus according to claim 3, characterized in that the tension member (18) is a hydraulic or pneumatic cylinder. (Figures 2 and 3) 6. Apparatus according to any one of claims 1 to 3, characterized in that the comb (20) has an arm (27) perpendicular to the plane of the teeth, to which the outer end of the tension bar (12) and the comb (20) are connected to the support (26). ) switching joints (11) are located above the end of this rigid arm (27) comprising the joint 811). (Figure 3) 7. Device according to any one of claims 1 to 3, characterized in that the support structure (26) and the tension bar (12) are connected by means of a connecting arm (15) which is hinged (14a, 14b) to both the support structure (26) and the tension bar (12). connected. (Figure 3) 8. Apparatus according to any one of claims 1 to 4. characterized in that it has a curved grid (5) which is connected to the bottom plate of the grid receiving space, for example grid cabinet (1), with a starting angle (a) of 20-80 *, preferably about 40 ', and ) with a curved path corresponding to its arc, being movable up and down about an axis (9). (Figures 1 and 3) Apparatus according to claim 8, characterized in that it is able to rotate in space about an axis (16) above the grid (5), with its outer end along the upper end of the grid (5) and along the inner side of the grid (5). having a downwardly movable trap blade actuated by an up and down trash removal mechanism (4) and connected to the upper end of the grid (5) by an obliquely downward slanting means (6) through an opening (23) for discharging trapped debris. lead out or match. (Figures 1 and 3) Apparatus according to claim 9, characterized in that the sliding plate (4b) is fixed to the frame (4a). (Figure 3) 11. Apparatus according to any one of claims 1 to 5, characterized in that the actuator (8) of the debris removal mechanism (3) is a hydraulic or pneumatic cylinder, the piston (8a) of which is connected to the support (26) or to the shaft (9). . (Figures 3 and 1, respectively)