FI113524B - Adjustable outlet valve for water purification basin flush water - Google Patents

Abstract

Outlet valve (2), for water which has flushed-clean filter materials (4, 5) of differing densities in a water purification basin (1), comprising a fixed lower tube (11) with an upper tube (10) inside it which acts as a weir, has the upper tube (10) movable in accordance with the sedimentation of the filter materials (4, 5). The upper tube is steered along guides inside the tubes. A guard fitted in the upper part of the movable tube prevents filter material reaching the outlet (33). A scraper attached to the lower tube prevents dirt coming between the movable and fixed tubes. The scraper is of preformed polyethylene.

Description

113524

Spolavloppsventil

The invention relates to a flush drain valve for cleaning filter material in a water purification pool.

In wastewater treatment, the dirty liquid is conducted through a number of different cleaning stages, through a number of basins. At the final cleaning stage, the water to be cleaned is led through e.g. a sand or active collage. In order to use the filter bearings with the best possible effect, these must be cleaned regularly. This is generally done so that the filter layers are mixed in water and sedimented, whereby the dirt collected in the liquid, the flock, is separated liquid on the surface or as lighter than the filter material. During the sedimentation, the sand first settles to the bottom and then e.g. active carbon. After this, the water cleaning can be continued in the same way as before cleaning the filter bearings.

In order to provide the best possible separation ability when cleaning the filter bearings, various types of dirt drainage devices have been used. You can use a stripper, but its use is cumbersome in large basins, you can use overflow edges in the periphery, but in such ports filter layers * · easily among the flock of water. It is particularly difficult to prevent the escape of activated carbon or the corresponding substance, which is apparent; : due to small differences in density.

With the aid of the valve construction of the invention, a crucial is made; : improvement of the above mentioned disadvantages. In order to realize: this valve is characterized by what is stated in the claims.

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As an advantage of the invention, it can be considered that during the rinsing of the filter layers, filter material should be mixed in the wastewater.

The height of the valve can be adjusted steplessly. The control pipes of the valve are protected against wear or operational difficulties caused by the dirty water. The separation of the activated carbon or the corresponding light material from the water and from the accumulated dirt of the filter layers is improved.

In the following, the invention is described in detail with reference to the accompanying drawings.

Figure 1 shows a water purification pool in side view, in which a flush drain valve is placed in the middle of the basin (walkway, pool and valve).

Figure 2 shows figure 1's water treatment pool seen from above.

Figure 3 shows the lower part of the flush drain valve from the side.

Figure 4 shows an enlargement of Figure 3's upper part.

Figure 5 shows the moving part of Figure 1 of the flush drain valve.

Figure 6 shows the shape of the valve orifice of Figure 5.

Figure 7 is the flush drain valve seen from above, and

Figure 8 shows the seal between the fixed and movable part of the valve tube.

Figure 1 presents a water filter pool 1, in the center of which is a drain valve 2, which is operated with compressed air. The water to be purified is measured at the basin from feed hatch 3. The purified '·. the water discharges through the drain pipe after passing through the filter bed. ; ·. branches 4 and 5. The filter layers, which are sand and activated carbon, lie on each other. The lower layer is the sand layer 5, which lies on * ·,. The nozzle bottom 6, and on the sand layer 5 has been placed the active collar layer 4, * * · **, the surface of which is below the lowest position of the adjustable flush discharge orifice valve. The total thickness of the filter bearings is * about \ .5 m. The flush drain valve has been bumped in the pool bottom 7 and from above in the dock 8. Tili the drain valve 2 hears a movable pipe • · • J 10, which can be controlled into the fixed pipe 11. Figure 1 on::: The flush drain valve's right side shows the upper position of the valve, where the water is cleaned by passing it through the filter. When the filter layers are cleaned, the filter layers are mixed in the water and dried! : sediment, for draining the dirty water, the drain valve is used so that one begins to lower the adjustable pipe 10 of the valve downwards at a rate ': *: as the sedimentation progresses.

Figure 2 shows the cleaning basin 1 seen from above. The beam 9 is attached to the basin, which is further connected along the bridge 8 to the edge of the basin.

Figures 3-8 show in more detail the design of the flush drain valve. The fixed pipe portion of the flush drain valve 2 is bifurcated so that the lower portion 12 is narrower than the upper portion 13. In the upper portion 13, the pipe 10 can move so that it stays in the narrow portion 12 in its lower position. When using compressed air systems, the position is limited by piston stop. In order to control the movement, in the movable tube 10 guide heels 14 and 15 are provided in the upper and lower parts, in this case a total of four. The guide heel 14 and 15 of the tube are guided inside the upper part 13 of the vertically mounted guide tubes 16 and 17 along which the tube 10 is guided. The guide tubes or rods 16 and 17 are fixed in their lower part in the lower part 12 of the pipe and fixed from their upper part e.g. by bolting in the bridge 8.

Figure 4 shows an enlargement of the sealing connection in the upper part 13 of the valve fixed pipe and the movable pipe 10. In Figure 8 a seal 20 is placed between the flanges 18 and 19 of the upper part 13 and these have been pressed together with the screw connection 21, with the aid of which the pipe 10 is placed in the upper connection of the relevant part, a scraper 22, the purpose of which is to clean the surface of the pipe 10 when the pipe is slid downwards, and in addition to keep the space between the pipes *, clean. The scraper 22 is made of e.g. molded welded polyethylene.

Figures 5 and 6 show a particularly advantageous construction *. ; of the upper part of the entile, which more effectively prevents the activated carbon from entering the wastewater. The stopper 23 is attached to the:: movable tube 10 overflow flange 24. The stopper consists of two: Γ; contacting surfaces 25, 26. It surrounds the upper part of the valve.

The wastewater is liked above the meeting place. Surfaces 25 and 26 are shown facing il; each other essentially at right angles. The stopper surface 26, along which; · 1 the dirt water is diverted to the valve, is the longest side, whose · · .1 rise is about 9 percent and is preferably between 5-15 percent, *: 1: advantageously between 8-10 percent. The stopper is attached to the flange of the pipe 24. Between the stopper and the flange is the seal 28. It has been found that the activated carbon particles settle on the surface 26 so that their access to the valve's discharge pipe is prevented.

113524 4

Figure 7 shows the construction of the valve seen from above. The compression plates of the compressed air cylinder are indicated by noon 30, in the middle of which the compressed air cylinder is fixed in drawbar 31 so that the movable tube can be controlled.

The invention has been described with reference to only one of its advantageous pre-processing examples. A variety of variants are possible within the scope of the invention as defined by the appended claims. In the construction of the valve control tube, different preamplings can be applied to the inside of the tube. The shape of the pool can vary. The diameter of the valve fixed tube can be the same throughout its length, as long as the fixing of the guide tube can be realized. The thickness of the filter material may vary.

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Claims (8)

A liquid drain valve (2) for cleaning a filter material (4, 5) of different density in a water purification basin (1), comprising a fixed lower tube (11) and a movable upper tube (10) over which the waste water is discharged downwards. (33), characterized in that the movable tube (10) is arranged to be moved within the lower tube (11) so that the upper movable tube (10) is adjustable according to the settling of the filter medium. Valve according to Claim 1, characterized in that the upper tube (10) can be guided by guiding means (14, 15, 16, 17) arranged inside the tubes (10, 11). Valve according to claim 2, characterized in that the lower tube (11) has guide tubes (16, 17) and the movable tube (10) has guide holes (14, 15). 1 »·. '. Valve according to Claim 1, characterized in that a stop (23) is formed at the upper part of the valve moving pipe (10) at the overflow edge to prevent the filter material from entering the discharge pipe (33). . * · * • Valve according to claim 4, characterized! in that a scraper (22) is mounted on the upper end of the lower tube, which is mounted against the outer surface of the movable tube (10) thereby preventing dirt from reaching between the movable tube (10) and the fixed tube (11). Valve according to claim 5, characterized in that the scraper (22) is molded polyethylene or the like. 7, 113524 Valve according to Claim 1, characterized in that the stop (23) extending around the overflow edge is formed by two inclined surfaces (25, 26) whose interface forms a point over which dirty liquid must pass to enter the outlet (33). Valve according to claim 7, characterized in that of the inclined surfaces (25, 26) the pitch of the basin side surface (26) is 5-15%, preferably 6-10% and most preferably 8-10%. I · »t