WO2016086389A1

WO2016086389A1 - Automatic backwashing filter

Info

Publication number: WO2016086389A1
Application number: PCT/CN2014/093036
Authority: WO
Inventors: 苏俊
Original assignee: 苏俊
Priority date: 2014-12-04
Filing date: 2014-12-04
Publication date: 2016-06-09

Abstract

An automatic backwashing filter, comprising a shell (1) provided with at least two filtration chambers (12), a filter element (5) being provided in the filtration chamber (12), the shell also being provided with a liquid inlet (6), the liquid inlet (6) being in communication respectively with the space outside the filter element (5) in each filtration chamber, the space inside the filter element (5) being connected to a liquid discharge manifold (15) by means of liquid discharge valves (8, 9, 10), a liquid discharge valve (8, 9, 10) being provided on a liquid discharge pipe of each filtration chamber (12), the space inside the filter element (5) being connected respectively to a compressed air source by means of air intake valves (2, 3, 4), and the shell (1) being provided with a rotary valve core (7) forming a U-shape; when the rotary valve core (7) rotates, the rotary valve core (7) can disconnect or connect the channel between the liquid inlet (6) and any one of the filtration chambers (12), an air control residue discharge valve (14) being provided at the bottom part of an inner side of the rotary valve core (7); when the rotary valve core (7) disconnects the channel between a liquid inlet (6) and a corresponding filtration chamber (12), the U-shaped opening of the rotary valve core (7) faces the disconnected filtration chamber (12).

Description

Automatic backwash filter

Technical field

The present invention relates to a filtering device, and more particularly to a backwashable filtering device.

Background technique

In the prior art, there is a backwash filter, the structure mainly comprises a casing, the casing is provided with a liquid inlet and a liquid discharge port, and the casing is further provided with a filter cartridge, and the filter cartridge is provided with a plurality of filters. a core, the liquid inlet is connected to a space outside the filter core through a pre-filtration passage, and an inner space of the filter core is connected to the liquid discharge port through a filter passage; the liquid inlet is connected with an inlet valve and a slag discharge valve arranged in parallel The liquid discharge port is connected with an intake valve and a liquid discharge valve arranged in parallel, and the liquid inlet valve, the slag discharge valve, the intake valve and the liquid discharge valve are connected by an external pipe. When it is working normally, the liquid inlet enters the liquid, enters the filter cartridge through the filter channel, and after filtering through the filter core, the filter residue is blocked on the filter core, and the relatively clean liquid is discharged from the liquid discharge port through the filter passage. When backwashing is required, the inlet valve and the drain valve are closed, then the intake valve and the slag discharge valve are opened, and the compressed air is blown back to the filter core to discharge the filter residue from the slag discharge valve. The disadvantages are: firstly, the device is inconvenient to operate, and it is necessary to control a plurality of valves at the same time; secondly, due to the long pipe length, the slag discharge is not thorough and the work efficiency is low; thirdly, when the backwashing is performed, the filter is stopped. Work, affecting normal use, need to set a separate filter on the pipeline.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic backwashing filter which overcomes the deficiencies of the prior art so that it can automatically slag without cessation of use and more slag discharge.

The object of the present invention is achieved by an automatic backwashing filter comprising a housing provided with at least two filter chambers, a filter core disposed in the filter chamber, and a liquid inlet and a liquid inlet on the housing. The outer space of the filter core in each filter chamber is respectively connected, and the space in the filter core is connected to the liquid discharge main pipe through the drain valve, and a drain valve is arranged on the liquid discharge pipe of each filter chamber; the space in each filter core The air inlet valve is connected to the compressed air source; the housing is provided with a U-shaped rotary valve core, and when the rotary valve core rotates, the rotary valve core can block or open the passage between the liquid inlet and any filter chamber. The bottom of the rotary valve core is provided with an air-controlled slag discharge valve. When the rotary valve core blocks the passage between the liquid inlet and the corresponding filter chamber, the U-shaped opening of the rotary valve core faces the partitioned filter chamber.

When the device is working, part of the filter chamber is normally filtered. At this time, the corresponding intake valve and slag discharge valve are closed, the liquid discharge valve is opened, and the liquid inlet is filled. After filtering through the filter core, the filter residue is blocked outside the filter core. The clean liquid is discharged from the drain. The other part of the filter core is in a flushing state. At this time, the rotary valve core blocks the passage between the liquid inlet and the corresponding filter chamber, and the U-shaped opening of the rotary valve core faces the blocked filter chamber, and the corresponding drain valve of the corresponding filter chamber Closed, the intake valve is opened, and the air-controlled slag discharge valve is opened, and the compressed air is blown back to the filter core, so that the filter residue outside the filter core falls off, and then exits from the air-controlled slag discharge valve. The device realizes the regeneration of the filter. By rotating the rotary spool to a specific position, the filter cores in each filter chamber can be backwashed separately. Compared with the prior art, the invention has less liquid to be sealed during slag discharge, less waste, and high slag discharge efficiency, and the invention can realize automatic slag discharge, which can filter the entire filter without stopping the use of the filter. The filter cores are re-rinsed one by one. The device can be used as a sewage filter or an oil filter.

In order to ensure reliable use, there are three filter chambers, and the three filter chambers are distributed around the outer circumference of the rotary valve core. When one of the filter cores is backwashed, there are two filter cores that are normally filtered and used reliably.

In order to further ensure reliable use, the intake valve and the drain valve are both solenoid valves, and the intake valve and the drain valve corresponding to the same filter chamber are interlocked, and the two are not opened or closed at the same time. This will ensure that there will not be a large amount of air directly entering the drain main.

As a further improvement of the present invention, the air control slag discharge valve is connected with a control valve, and the valve of the control valve is supplied to the air control slag discharge valve via the check valve. The control valve can be used to control the air control slag valve to open or close, which is convenient for automatic control.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

Among them, 1 housing, 2, 3, 4 intake valve, 5 filter core, 6 inlet port, 7 rotary valve core, 8, 9, 10 drain valve, 11 check valve, 12 filter chamber, 13 drain Control valve, 14 air control slag valve, 15 discharge manifold.

detailed description

As shown in FIG. 1 , it is an automatic backwashing filter, and the casing 1 is provided with three filter chambers 12 , and the filter chamber 12 is provided with a filter core 5 , and the casing 1 is further provided with a liquid inlet 6 and a liquid inlet 6 respectively, the outer space of the filter core in each filter chamber 12 is connected, and the space in the filter core 5 is connected to the liquid discharge manifold 15 through the

liquid discharge valves

8, 9, 10, and one row is arranged on the liquid discharge pipe of each filter chamber. The liquid valve; the space in each filter core 5 is connected to the compressed air source via the intake valves 2, 3, 4 respectively; the housing 1 is provided with a U-shaped rotary valve core 7, and when the rotary valve core 7 rotates, the rotary valve The core 7 can block or open the passage between the inlet port 6 and any of the filter chambers; the bottom of the rotary valve core 7 is provided with an air-controlled slag discharge valve 14 that blocks the inlet port 6 and the corresponding filter chamber 12 In the case of the passage, the U-shaped opening of the rotary valve body 7 faces the blocked filter chamber 12; the three filter chambers 12 are distributed on the outer circumference of the rotary valve body 7. The above-mentioned intake valves 2, 3, 4 and the

liquid discharge valves

8, 9, 10 are all electromagnetic valves, and the corresponding intake valve and the discharge valve of the same filter chamber 12 are interlocked, and the two are not turned on or off at the same time, in this figure When the intake valve 2 is opened, the drain valve 9 is closed. When the intake valve 2 is closed, the drain valve 9 is opened, and the rest are similar; the air control slag discharge valve 14 is connected with the control valve 13 and the valve of the control valve 13 After that, the gas slag discharge valve 14 is supplied to the air through the check valve 11.

During operation, part of the filter chamber 12 is normally filtered. At this time, the corresponding intake valves 2, 3, 4 and the slag discharge valve are closed, the

discharge valves

8, 9, 10 are opened, the liquid inlet 6 is filled, and the filter 5 is filtered. Thereafter, the filter residue is blocked outside the filter core 5, and the relatively clean liquid is discharged from the drain port. The other part of the filter core 5 is in a flushing state, at this time, the rotary valve core 7 blocks the liquid inlet 6 and the corresponding passage between the filter chamber 12, the U-shaped opening of the rotary valve core 7 faces the blocked filter chamber 12, and the

corresponding drain valves

8, 9, 10 of the corresponding filter chamber 12 are closed, and the intake valves 2, 3 4, open, and the air control slag discharge valve 14 is opened, the compressed air back blows the filter core 5, so that the filter residue outside the filter core 5 falls off, and then leaves the device from the air control slag discharge valve 14 to realize the flushing regeneration of the filter. By rotating the rotary spool 7 to a specific position, the filter cartridge 5 in each filter chamber 12 can be backwashed separately. The device can perform backwashing regeneration of the filter element 5 of the entire filter one by one without stopping the use of the filter.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed by the present invention, those skilled in the art can make some substitutions for some of the technical features without any creative labor according to the disclosed technical content. Modifications, such substitutions and modifications are within the scope of the invention.

Claims

The utility model relates to an automatic backwashing filter, which is characterized in that it comprises a casing provided with at least two filter chambers, a filter core is arranged in the filter chamber, and a liquid inlet is arranged on the casing, and the liquid inlets are respectively connected to the filter chambers. In the outer space of the filter core, the space inside the filter core is connected to the liquid discharge pipe through the drain valve, and a drain valve is arranged on the drain pipe of each filter chamber; the space in each filter core is respectively passed through the intake valve and a compressed air source is connected; a U-shaped rotary valve core is disposed in the housing, and when the rotary valve core rotates, the rotary valve core can block or open a passage between the liquid inlet and any filter chamber; the rotary valve core The inner bottom portion is provided with an air-controlled slag discharge valve. When the rotary valve core blocks the passage between the liquid inlet and the corresponding filter chamber, the U-shaped opening of the rotary valve core faces the partitioned filter chamber.
An automatic backwashing filter according to claim 1, wherein there are three filter chambers, and the three filter chambers are distributed around the outer circumference of the rotary spool.
An automatic backwashing filter according to claim 1 or 2, wherein the intake valve and the drain valve are both solenoid valves, and the intake valve and the drain valve corresponding to the same filter chamber are interlocked, They are not turned on or off at the same time.
The automatic backwashing filter according to claim 1 or 2, wherein the air control slag discharge valve is connected with a control valve, and the valve of the control valve is supplied to the air control slag discharge valve via the check valve. .