CN202237429U - Filter tank - Google Patents

Abstract

A filter tank, including a water inlet system and an overflow system, is characterized in that it also includes a drainage tank arranged in the filter tank, and a floating ball is arranged in the drainage tank, and the water level on the drainage tank can be controlled by raising and lowering the water level. The drain hole of the drain is closed or opened to complete the discharge of backwash water. The utility model not only backwashes thoroughly, but also avoids material running when the backwash water intensity is high, and can adapt to the high-intensity backwash required by thick filter materials, double-layer and multi-layer filter materials, and the size and layout of the filter tank are not Limited by the equipment, the overall structure is compact, the construction and installation are simple, and it is easy to control.

Description

a filter

technical field

The utility model relates to a filter pool.

Background technique

A filter is a common structure in water treatment. V-shaped filters and flap filters are currently used more. When the filter is filtered to a certain stage, backwashing is required. The backwashing of the V-type filter adopts the method of air washing, air and water washing at the same time, and then water washing; The small holes at the bottom of the two V-shaped grooves enter the filter tank, sweep the surface of the filter layer, push the dirt and impurities recoiled from the filter layer to the drainage tank, and discharge them through the drainage tank together with the backwash sewage. After backwashing , the V-type filter enters the normal filtration stage. However, when the thickness of the filter material is relatively large or it is a double-layer filter material or a multi-layer filter material, the backwashing of the V-shaped filter tank is not complete, and there is a problem of filter material running out at the same time. The flap filter tank controls the backwashing water of the filter tank through the flap set on the drainage tank. After backwashing, the filter material needs to settle for about 20 seconds. After the light filter material sinks, the flap is opened to ensure that the light filter material will not be lost through the flap, and the dirt and impurities can be effectively discharged. Although the flap filter solves the problem of filter material running out, and the backwash is relatively thorough, but due to mechanical and control limitations, generally a single-cell filter uses one cylinder to drive two flaps, and the length of each flap is limited , which limits the width of the single cell filter.

Utility model content

The purpose of the utility model is to provide a filter tank with thorough backwashing and unlimited size.

The purpose of this utility model is achieved in this way, a filter tank, including a water inlet system and an overflow system, is characterized in that: it also includes a drain tank arranged in the filter tank, the drain tank is provided with a floating ball and can The drain hole on the drain tank is controlled to be closed or opened by the rise and fall of the water level, thereby completing the discharge of backwash water.

In order to further accurately control the drainage speed, the above-mentioned drainage tank is provided with a floating ball tank with independent water inlet and outlet control devices. The drain hole valve plate on the water tank is connected, and the closing or opening of the drain hole is realized through the lifting of the drain hole valve plate.

In order to control the lifting of the floating ball, a floating ball tank is provided in the drainage tank with independent water inlet and outlet control devices. The floating ball is placed in the floating ball tank and connected to the drain hole valve plate connect.

In order to ensure that the float tank will not enter water and the water level will not change when the backwash water is drained, thereby ensuring that the drain hole is always open, the wall of the float tank is higher than the upper edge of the drain hole.

In order to facilitate the sliding of the drain hole valve plate and accurately control the drainage volume, a track is provided on the wall of the drain tank, and the drain hole valve plate is arranged in the track and can slide up and down along the track.

The above-mentioned filter tank is also provided with a backwash air pipe and a backwash water pipe.

The above-mentioned backwash air pipe and backwash water pipe are connected to the backwash device, and the backwash device is arranged in the filter tank and is a water distribution air pipe or a filter head filter plate.

Both sides of the filter tank are provided with surface cleaning water pipes and a row of small water holes for cleaning the surface of the filter material. When the backwashing water is drained, the small water holes on the surface sweeping water pipe are opened to discharge the sweeping water, so that the suspended matter on the surface of the filter material can be more easily discharged from the filter tank.

The above-mentioned water inlet system includes a water inlet channel connected to the water inlet main pipe and is connected to the above-mentioned filter tank through a water inlet tank, and a drainage main channel is provided below the water inlet tank; And the float tank drain valve is connected with the main drainage channel.

A water inlet weir is provided between the water inlet tank and the filter tank, and a water inlet hole is arranged on the water inlet weir, and the wall of the above drainage tank is higher than the height of the water inlet weir, so as to ensure that there is no water in the drainage tank during normal filtration. Ingress of water.

A water inlet gate valve is provided between the water inlet main channel and the water inlet tank, a water inlet pneumatic gate valve is provided between the water inlet tank and the float tank, and a backwash drain pipe is provided on the drainage main channel.

The above-mentioned overflow system includes an overflow well connected with the filter tank, and the overflow well is connected with the filtered water outlet pipe through a clear water channel.

When filtering, the filtered water enters the main water inlet channel through the water inlet main pipe, the water inlet gate valve is opened, the filtered water enters the water inlet tank from the water inlet main channel, and the filtered water enters the filter tank through the water inlet hole on the water inlet weir to start the filtration process. During normal filtration, the water level of the floating ball tank is adjusted through the water inlet pneumatic gate valve and the drainage pneumatic gate valve to control the position of the floating ball, thereby controlling the position of the drain hole valve plate, so that the drain hole is in a closed state. The filtered water first flows into the overflow well, then flows into the clear water channel, and finally is discharged from the filtered water outlet pipe. When the head loss of the filter layer reaches a predetermined value, the filter starts to backwash. When backwashing, the drain hole is still closed. Wait 15-20 seconds after the backwashing is over, open the drainage pneumatic gate valve to drain water, so that the water level in the float tank will drop, and the float ball will drop with the water level and drive the drain hole through the connecting rod. The valve plate is lowered, thereby opening the drain hole, so that the backwash water in the tank is discharged to the drain tank through the drain hole, the backwash drain valve is opened, and the water in the drain tank is discharged to the main drainage channel, and then discharged through the backwash drain pipe . When the backwash water is drained, the surface sweeping water is turned on, making it easier to drain the suspended matter on the surface of the filter material. After the backwash is completed, close the drainage pneumatic gate valve, open the water inlet gate valve to enter water, so that the water level in the float tank rises, and at the same time the float rises and drives the drain hole valve plate to rise through the connecting rod, thereby closing the drain hole and starting Another round of filtering.

The utility model has the following beneficial effects: the utility model is provided with a drain tank in the filter tank and completes backwashing through the lifting and lowering of the floating ball. Material, double-layer and multi-layer filter materials require high-strength backwashing, and the size and layout of the filter tank are not limited by equipment, compact structure, simple construction and installation, and easy to control.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is a sectional view of Fig. 1A-A;

Fig. 3 is a sectional view of Fig. 1B-B;

Fig. 4 is a schematic diagram of the drainage tank structure;

Fig. 5 is a bottom view of Fig. 4 .

Detailed ways

Embodiment, referring to accompanying drawing, a kind of filter tank, comprises water inlet system and overflow system, is provided with drainage tank 17 in filter tank 7, is provided with float tank 16 in drain tank 17, and float ball 14 is placed in float tank 16 and is connected with the drain hole valve plate 12 arranged on the drain groove 17 wall through the connecting rod 15, the drain hole valve plate 12 lifts to open or close the drain hole 11 on the drain groove 17, and the float tank 16 wall is higher than the drainage hole. The upper edge of the hole 11; the wall of the drain groove 17 is provided with a track 13, and the drain hole valve plate 12 is arranged in the track 13 and can slide up and down along the track 13; the floating ball 14 and the drain hole valve plate 12 are all made of light, non-toxic materials , There is a sealing material to seal between the drain hole valve plate 12 and the valve seat.

The water inlet system includes a water inlet channel 2 connected to the water inlet main pipe 1 and is connected to the filter tank 7 through the water inlet tank 4. The water inlet tank 4 is provided with a drainage main channel 21; The flushing and draining valve 10 and the float tank draining valve 9, that is, the draining pneumatic gate valve, are connected to the main drainage channel 21; a water inlet weir 5 is provided between the water inlet tank 4 and the filter tank 7, and a water inlet hole is arranged at the bottom of the water inlet weir 5 6. The wall of the drainage tank 17 is higher than the height of the water inlet weir 5, the water inlet gate valve 3 is set between the water inlet main channel 2 and the water inlet tank 4, and the water inlet pneumatic gate valve is set between the water inlet tank 4 and the float tank 16 8. A backwash drainpipe 24 is provided on the main drainage channel 21 .

The filter tank is provided with a backwash air pipe 18 and a backwash water pipe 22 and is connected with the water distribution air pipe 26 or the filter head filter plate arranged in the filter tank 7 . Both sides of the filter tank 7 are provided with a surface sweeping water pipe 25 and have a row of small water holes for sweeping the surface of the filter material.

The overflow system includes an overflow well 20 connected to the filter tank 7 , and the overflow well 20 is connected to a filtered water outlet pipe 23 through a clear water channel 19 .

When filtering, the filtered water enters the water inlet channel 2 through the water inlet main pipe 1, and the water inlet gate valve 3 is opened. Pool 7 starts the filtering process. During normal filtration, the water level of the floating ball tank 16 is adjusted through the water inlet pneumatic gate valve 8 and the drainage pneumatic gate valve 9, and the position of the floating ball 14 is controlled to control the position of the drain hole valve plate 12 so that the drain hole 11 is in a closed state . The filtered water flows into the overflow well 20 first, then flows into the clear water canal 19, and finally discharges from the filtered water outlet pipe 23. When the water head loss of the filter layer reaches a predetermined value, the filter tank 7 is backwashed. During backwashing, the drainage hole 11 is still in a closed state, the filtered water outlet pipe 23 is closed, and the backwashing air pipe 18 and the backwashing water pipe 22 supply the air and water required for backwashing respectively. Flush with air and water at the same time, and finally backwash with water. Wait 15 to 20 seconds after the backwash is finished, open the drainage pneumatic gate valve 9 to drain water, so that the water level in the float tank 16 will drop, and the float 14 will drop with the water level and drive the drain hole valve plate 12 to drop through the connecting rod 15, thereby opening Drain hole 11, make the backwash water in pond 7 enter drain tank 17 through drain hole 11, open backwash drain valve 10, the water in drain tank 17 discharges to drainage main canal 21, discharges by backwash drainpipe 24 again . When the backwash water is drained, the surface sweeping water pipe 25 is opened. After the backwash is completed, the drainage pneumatic gate valve 9 is closed, and the water inlet gate valve 8 is opened to enter water, so that the water level in the float tank 16 rises, and the float ball 14 Rise and drive the drain hole valve plate 12 to rise through the connecting rod 15, thereby closing the drain hole 11, and the filter tank starts a new round of filtration.

Claims (10)

1. A filter, including a water inlet system and an overflow system, characterized in that: it also includes a drainage tank (17) arranged in the filter tank (7), and a floating ball ( 14) and the drain hole (11) on the drain tank (17) can be controlled to close or open by raising and lowering the water level, so as to complete the discharge of backwash water. 2. The filter according to claim 1, characterized in that: the drainage tank (17) is provided with a floating ball tank (16) with independent water inlet and outlet control devices, and the floating ball (14 ) placed in the float tank (16) and connected with the drain hole valve plate (12) provided on the drain tank (17) through the connecting rod (15), through the drain hole valve plate (12) The lifting realizes the closing or opening of the drain hole (11). 3. The filter tank according to claim 2, characterized in that: a track (13) is provided on the wall of the drain tank (17), and the drain hole valve plate (12) is set in the track (13) And can slide up and down along the track (13). 4. The filter tank according to any one of claims 1-3, characterized in that: it is also provided with a backwash air pipe (18) and a backwash water pipe (22); the backwash air pipe (18) and backwash water pipe (22) Connected to the backwashing device, which is set in the filter tank (7) and is a water distribution air pipe (26) or a filter head filter plate. 5. The filter according to claim 4, characterized in that: both sides of the filter (7) are provided with surface cleaning water pipes (25) and a row of small water holes for cleaning the surface of the filter material . 6. The filter according to claim 5, characterized in that: the water inlet system includes a water inlet main canal (2) connected to the water inlet main (1) and is connected to the filter through a water inlet tank (4) (7) connection, a drainage main channel (21) is provided under the water inlet tank (4); the drainage tank (17) and the ball float tank (16) pass through the backwash drain valve (10) and the ball float tank respectively The drain valve (9) is connected with the main drainage channel (21). 7. The filter according to claim 6, characterized in that: an inlet weir (5) is provided between the water inlet tank (4) and the filter (7), and an inlet weir (5) is provided with There are water inlet holes (6). 8. The filter according to claim 7, characterized in that: a water inlet gate valve (3) is provided between the water inlet main canal (2) and the water inlet tank (4), and the water inlet tank (4) and the water inlet tank (4) are A water inlet pneumatic gate valve (8) is provided between the float tanks (16), and a backwash drainpipe (24) is provided on the main drainage channel (21). 9. The filter according to claim 8, characterized in that: the wall of the drain tank (17) is higher than the height of the water inlet weir (5); the wall of the floating ball tank (16) is higher than the drain Hole (11) upper edge. 10. The filter tank according to claim 9, characterized in that: the overflow system includes an overflow well (20) connected to the filter tank (7), and the overflow well (20) passes through the clear water channel (19 ) is connected with the filter water outlet pipe (23).

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