CN2489855Y

CN2489855Y - Differential pressure centrifugal self-cleaning filter

Info

Publication number: CN2489855Y
Application number: CN 01235264
Authority: CN
Inventors: 席立达
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-07
Filing date: 2001-06-07
Publication date: 2002-05-08
Anticipated expiration: 2011-06-07

Abstract

The utility model relates to a differential pressure centrifugal self-cleaning filter, which is characterized in that: a control circuit which controls work status of a magnetic valve(7) and a motor(6) according to the signal of the pressure pickups(9),(10) is arranged inside a circuit box(8) on a shell body(2); the shell body(2) with an outlet(1) and an infall(4) is provided with a barrel-shaped sieve(5) inside, the outlet(1) is only be connected and communicated with the cavity of the sieve(5); the sieve(5) is arranged inside of the impellers(3) drove by a motor(6); two sensors(10),(9) are arranged at the position of the infall(4) and the outlet(1); the bottom of the shell body(2) is provided with a wash water magnetic valve(7). The utility model uses the working way of outside filtration, has a strong self-cleaning function, can realize the self-cleaning and escaping from the dirt, has low bulk, low cost, convenient arrangement and broad sphere of application.

Description

Self-cleaning differential pressure centrifugal filter

The utility model relates to the filter that is used to prevent pipeline blockage, gets rid of the pipeline dirt.

In the prior art, pipe-line system is to be stranded the major issue of scratching people because of the water quality reason causes the system failure always, has occurred existing various filter product thus.Because these products are being deposited drawback in varying degrees, cause effect not satisfactory (as filtering unclean, no self-cleaning function), have much room for improvement.

The purpose of this utility model is, designs a kind of self-cleaning differential pressure centrifugal filter, and it can in time and effectively remove the dirt that adheres to screen surface, has good self-cleaning function, thereby makes it have good filtration.

The technical solution of the utility model is, described self-cleaning differential pressure centrifugal filter has the housing that the control circuit box has been installed, the control circuit of accepting two pressure sensor signals and controlling blowdown magnetic valve and motor power break-make according to this places described control circuit box, one end of described housing is a delivery port and water inlet is arranged on this housing, its design feature is, the tubular filter screen is housed in the described housing, the delivery port inboard of described housing only directly is connected with this tubular filter screen inner chamber through an end of this tubular filter screen, be equipped with in the described tubular filter screen by the described electric motor driven impeller that is installed in the housing other end, described two pressure sensors are installed the water inlet and the delivery port position of housing respectively, and the described blowdown magnetic valve of an end and housing intracavity inter-connection is installed in housing bottom.

Make below in conjunction with accompanying drawing and to further specify.

Description of drawings:

Fig. 1 is the overall structure of vertically analysing and observe of the present utility model;

Fig. 2 is a kind of example structure block diagram of control circuit;

Fig. 3 is a kind of embodiment actual track figure of comparator circuit among Fig. 2;

Fig. 4 is a kind of embodiment actual track figure of amplifier circuit among Fig. 2;

Fig. 5 is a kind of embodiment actual track figure of A/D change-over circuit among Fig. 2;

Fig. 6 is a kind of embodiment actual track figure of Drive and Control Circuit among Fig. 2.

In described accompanying drawing:

The 1-delivery port, 9, the 10-pressure sensor

The 2-housing, the 11-comparator,

The 3-impeller, 12, the 15-amplifier,

The 4-water inlet, 13, the 16-A/D change-over circuit,

5-tubular filter screen, the 14-input equipment,

The 6-motor, the 17-microprocessor,

8-control circuit box, the 18-Drive and Control Circuit.

As shown in Figure 1, the utility model has the housing (2) that control circuit box (8) have been installed, the control circuit (prior art structure) of accepting two pressure sensors (9) (10) signal and controlling blowdown magnetic valve (7) and motor (6) on/off according to this places described control circuit box (8), housing (2) one ends are delivery ports (1) and this housing (1) is provided with water inlet (4), its design feature is, tubular filter screen (5) is housed in the housing (2), and the delivery port (1) of housing (2) inboard (being the right side of this delivery port (1) among Fig. 1) only directly is connected with this filter screen (5) inner chamber through tubular filter screen (5) one ends, and (to be described tubular filter screen (5) with the same water inlet in space (4) between shell (2) inwall directly be communicated with and just communicate with delivery port (1) after must be via filter screen (5), the left side of the outside of described delivery port (1)-be delivery port among Fig. 1 (1) is communicated with external drainpipe through flange), the impeller (3) that is driven by the described motor (6) that is installed in housing (2) other end is housed in the tubular filter screen (5), two pressure sensors (10) (9) are installed in the position of the water inlet (4) and the delivery port (1) of housing (2) respectively, and the blowdown magnetic valve (7) of an end and housing (2) intracavity inter-connection is installed in housing (2) bottom.

Can adopt the interlock circuit of prior art to realize described blowdown control procedure, Fig. 2 promptly is the control circuit block diagram of a kind of embodiment.As known in the figure, the composition of described control circuit is, can detect respectively within the tubular filter screen (5), the pressure sensor of external pressure (9) (10) is delivered to comparator (11) with detection signal and is carried out the comparison of differential pressure value and setting value, the output signal of comparator (11) is delivered to A/D change-over circuit (3) and is carried out analog-to-digital conversion after amplifier (12) amplifies, data signal after the conversion is to deliver to Drive and Control Circuit (18) after the microprocessor IC2 (17) of AT89C51 handles through model, by the break-make of the working power of this circuit (18) control blowdown magnetic valve (7) and motor (6); The design of pressure parameter is delivered to amplifier (15) through setting input (14), and signal amplifies after A/D change-over circuit (16) is changed, and microprocessor (17) (AT89C51 chip IC 2) is sent in its output.

Operation principle of the present utility model is that referring to Fig. 1, sewage is sent into shell (2) inner chamber by water inlet (4), is discharged by delivery port (1) after tubular filter screen (5) filters; Dirt then is retained down by described filter screen (5) and sticks to its outer surface, the dirt that adheres to along with filter screen (5) outer surface increases, opening of sieve is blocked by dirt, current are not smooth, will between described water inlet/(4) and delivery port (1), form the pressure differential (water inlet hydraulic pressure is higher) of water, this differential pressure is recorded by pressure sensor (9) (10), if surpassing, this differential pressure sets the differential pressure upper limit, then control circuit sends corresponding control signal, connect the power supply of blowdown magnetic valve (7) and motor (6), make valve (7) open and make motor (6) impeller (3) rotation at a high speed, thereby the water body that drives in the whole filtering net (5) rotates with a fixed angular speed, the rotation current under action of centrifugal force by outside filter screen, throwing away in the described filter screen, form powerful back flush current thus, rapidly, effectively the dirt that adheres on the filter screen (5) is washed away totally, and discharge from the sewage draining exit that blowdown magnetic valve (7) is housed with the sewage form; Along with the carrying out of this cleaning process, the inside and outside described differential pressure of filter screen (5) reduces gradually, and until almost disappearing, this moment, control circuit promptly sent the working power that signal turn-offs magnetic valve (7) and motor (6), and filter enters the normal filtration duty.By described structure and principle as can be known, this device has adopted and the diverse outside filtering type working method of conventional filter, be that treatment sewage is flowed into outward by filter screen, filter the back clean water by seeing off in the filter screen, utilize the motion of impeller (3) to change the physical state of fluid, greatly improved the self-cleaning function of filter.

As known from the above, the utility model is a kind of self-cleaning differential pressure centrifugal filter, can realize automatically cleaning and need not manually-operated, cleans that filtered water continues to flow in the blowdown process, greatly facilitates the user, has saved expense.Device volume is little, take up an area of less, easy for installation, reduce investment outlay, applied widely, can be used for water system, various cooling water, industry and municipal sewage treatment etc., practical.

Embodiment: according to the described filter of accompanying drawing and said structure, shell (2) overall dimensions (diameter * length) is φ 450 * 900mm, and the setting differential pressure is 0.8kg/cm ², working power is that 220V, 50HZ exchange, and adopts control circuit structure shown in Figure 2; Wherein the side circuit of comparator (11) and amplifier (12) (15) is respectively Fig. 3 and shown in Figure 4; Fig. 5 is the side circuit of A/D change-over circuit (13) (16), wherein AD676 chip IC ₁Be A/D converter, arrow M is the analog signal input port.Fig. 6 is the actual track of Drive and Control Circuit (18), and its output can drive executive component (as electromagnetic relay) and realize the power supply of valve (7) and motor (6) is controlled.This device also can adopt other control circuit form to realize described control function.

Claims

1, a kind of self-cleaning differential pressure centrifugal filter, the housing (2) that control circuit box (8) have been installed is arranged, the control circuit of accepting two pressure sensors (9) (10) signal and controlling blowdown magnetic valve (7) and motor (6) on/off according to this places control circuit box (8), housing (2) one ends are delivery ports (1) and this housing (1) is provided with water inlet (4), it is characterized in that, tubular filter screen (5) is housed in the housing (2), the delivery port (1) of housing (2) is inboard only directly to be connected with this filter screen (5) inner chamber through tubular filter screen (5) one ends, the impeller (3) that is driven by the described motor (6) that is installed in housing (2) other end is housed in the tubular filter screen (5), two pressure sensors (10) (9) are installed in the position of the water inlet (4) and the delivery port (1) of housing (2) respectively, and the described blowdown magnetic valve (7) of an end and housing (2) intracavity inter-connection is installed in housing (2) bottom.