CN112479401A - Sewage and filter screen cleaning system and filter self-cleaning method - Google Patents

Abstract

A sewage and filter screen cleaning system comprising: the sewage treatment device comprises a sewage tank, a first water pump, an ultrafiltration membrane filter, a clear water tank, a second water pump and a control circuit, wherein a filter screen is arranged on the sewage tank; the control circuit is used for controlling the first water pump to pump the water in the sewage tank to the ultrafiltration membrane filter and then discharge the water to the clean water tank, and is also used for controlling the second water pump to pump the water in the clean water tank to the ultrafiltration membrane filter and the filter screen to clean the ultrafiltration membrane filter and the filter screen. The ultrafiltration membrane filter and the filter screen can be automatically cleaned by the clear water in the clear water extraction tank, so that the filter element does not need to be replaced manually at regular intervals, the sewage tank does not need to be cleaned manually at frequent regular intervals, and the filter screen is not easy to block.

Description

Sewage and filter screen cleaning system and filter self-cleaning method

Technical Field

The application belongs to the technical field of cleaning equipment, and particularly relates to a sewage filtering system and a self-cleaning method of a filter.

Background

The first stage of the traditional cleaning and filtering system is precipitation and filtration, and larger and heavier impurities can be precipitated to the bottom of the sewage tank; the second stage is a stainless steel mesh filter which is a pre-pump filtering device and prevents large-particle impurities from entering a filtering pipeline to damage a filtering water pump; the third stage to the fifth stage are micron-sized filter element filters, sewage enters the multi-stage filter element filters, dirt is blocked by the filter elements and is left in the filter element container, and clear water is discharged from the clear water port.

Therefore, the traditional cleaning and filtering system needs to replace the filter element manually at regular intervals according to the sewage condition, the replacement is generally carried out once in 1-3 months, the material consumption and labor cost are high, the replacement process is very complicated, workers can contact dirty water, and the automation degree is low; in the first-stage precipitation filtration, a large amount of dirt and impurities can be accumulated in a sewage tank, frequent and regular manual cleaning is needed, and the cleaning is very inconvenient in a sealed tank; in the second-stage stainless steel mesh filtration, the filter is easily blocked by dirt (large-particle impurities such as plastic sheets, hairs and paper sheets) floating in water, water flow is not smooth, a water pump is easily blocked, and the service life of the filter system is shortened.

Disclosure of Invention

The application aims to provide a cleaning system and a filter self-cleaning method, and aims to solve the problems that a traditional cleaning and filtering system needs to replace a filter element regularly and manually, a sewage tank needs to be cleaned frequently and regularly, and a filter screen is easy to block.

A first aspect of an embodiment of the present application provides a sewage and filter screen cleaning system, including:

the sewage tank is provided with a filter screen opposite to the sewage inlet;

a water inlet of the first water pump is arranged in the box body of the sewage tank;

the water inlet of the ultrafiltration membrane filter is connected with the water outlet of the first water pump through a first pipeline, the water inlet of the ultrafiltration membrane filter is communicated with a second pipeline, and the outlet of the second pipeline is opposite to the filter screen;

the water outlet of the ultrafiltration membrane filter is opposite to the box body of the clean water box;

a water inlet of the second water pump is arranged in the box body of the clean water box, and a water outlet of the second water pump is connected with a sewage outlet of the ultrafiltration membrane filter through a third pipeline; and

and the control circuit is connected with the first water pump and the second water pump, and is used for controlling the first water pump to pump water in the sewage tank to the ultrafiltration membrane filter to discharge the water to the clean water tank after filtering and also used for controlling the second water pump to pump water in the clean water tank to the ultrafiltration membrane filter and the filter screen to clean the ultrafiltration membrane filter and the filter screen.

In one embodiment, the sewage tank is provided with a sewage outlet and a first water level sensor connected with the control circuit.

In one embodiment, the clean water tank is provided with a second water level sensor connected with the control circuit.

In one embodiment, the first pipeline, the second pipeline and the third pipeline are respectively provided with a water flow controller.

In one embodiment, the sewage treatment device further comprises a sewage absorption water motor and an absorption device, the sewage absorption water motor is connected with the sewage inlet through a pipeline, and the sewage absorption water motor drives the absorption device to absorb sewage and discharge the sewage to the sewage inlet.

In one embodiment, the method further comprises the following steps:

a water inlet of the third water pump is connected with a water outlet of the clean water tank through a fourth pipeline;

the clear water filter screen is arranged in the fourth pipeline; and

and the cleaning device is connected with the water outlet of the third water pump.

In one embodiment, a water flow controller is arranged on the fourth pipeline.

A second aspect of the embodiments of the present application provides a self-cleaning method for a filter based on the above-mentioned sewage and filter screen cleaning system, the self-cleaning method for a filter includes:

detecting a first water level of the sewage tank and a second water level of the clean water tank;

and if the water level is lower than a first preset value and the second water level is higher than a second preset value, starting the second water pump to enable clean water to enter the ultrafiltration membrane filter from the clean water tank to flush the ultrafiltration membrane filter, and enabling water for flushing the ultrafiltration membrane filter to flow out of a water inlet of the ultrafiltration membrane filter and pass through the second pipeline to flush the filter screen.

According to the sewage and filter screen cleaning system and the filter self-cleaning method, the ultrafiltration membrane filter and the filter screen can be self-cleaned by extracting the clean water from the clean water tank, so that the filter element does not need to be replaced manually at regular intervals, the sewage tank does not need to be cleaned manually at frequent regular intervals, and the filter screen is not easy to block.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a sewage and filter screen cleaning system according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a sewage and filter screen cleaning system according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 shows a schematic structural diagram of a sewage and filter screen cleaning system provided in an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, which are detailed as follows:

the sewage and filter screen cleaning system can be applied to cleaning robots, sewage treatment equipment and the like, and comprises a sewage tank 2, a filter screen 3, a first water pump 4, an ultrafiltration membrane filter 5, a clean water tank 6, a second water pump 7 and a control circuit 8.

A filter screen 3 opposite to the sewage inlet 1 is arranged on the sewage tank 2; the water inlet of the first water pump 4 is arranged in the box body of the sewage tank 2; a water inlet of the ultrafiltration membrane filter 5 is connected with a water outlet of the first water pump 4 through a first pipeline 9, a water inlet of the ultrafiltration membrane filter 5 is communicated with a second pipeline 10, and an outlet of the second pipeline 10 is opposite to the filter screen 3; the water outlet of the ultrafiltration membrane filter 5 is opposite to the box body of the clean water box 6; a water inlet of the second water pump 7 is arranged in the box body of the clean water box 6, and a water outlet of the second water pump 7 is connected with a sewage outlet of the ultrafiltration membrane filter 5 through a third pipeline 11; the control circuit 8 is connected with the first water pump 4 and the second water pump 7, and the control circuit 8 is used for controlling the first water pump 4 to pump water in the sewage tank 2 to the ultrafiltration membrane filter 5 for filtering and then discharging the water to the clean water tank 6, and is also used for controlling the second water pump 7 to pump water in the clean water tank 6 to the ultrafiltration membrane filter 5 and the filter screen 3 for cleaning the ultrafiltration membrane filter 5 and the filter screen 3.

The filter screen 3 is arranged on the upper part of the sewage tank 2, and large and heavy impurities, large-particle dirt and the like can be blocked in the filter screen 3 during filtering and cannot enter the bottom of the sewage tank 2. Thereby can not lead to sewage case 2 to have a large amount of great heavier impurity and large granule dirt to pile up, need frequently wash, thereby also avoided filter screen 3 to be blockked up simultaneously and lead to the water route to block up, the risk of pump stalling. And the filter screen 3 can be replaced regularly according to the dirty condition of the ground. Compared with the method for replacing the mesh bag of the filter screen 3 and the method for cleaning the sewage tank 2, the method does not need to consume extra clear water, does not need to be cleaned frequently, and is more convenient and simpler to maintain. The ultrafiltration membrane filter 5 supports washing dirt, dirt accumulated in the ultrafiltration membrane filter 5 can be washed out, and the ultrafiltration membrane filter can be recycled for about 3 years according to the condition of sewage.

Fig. 2 shows a schematic structural diagram of a sewage and filter screen cleaning system according to another embodiment of the present application, and for convenience of description, only the parts related to the present embodiment are shown, which are detailed as follows:

the sewage tank 2 is provided with a sewage outlet 13 and a first water level sensor 12 connected with the control circuit 8, and the first water level sensor 12 is used for detecting the sewage level of the sewage tank 2. The clean water tank 6 is provided with a second water level sensor 14 connected with the control circuit 8, and the second water level sensor 14 is used for detecting the clean water level of the clean water tank 6. The first pipeline 9, the second pipeline 10 and the third pipeline 11 are respectively provided with a water flow controller. The water flow controller is commonly an electromagnetic water valve and an electric ball valve, and aims to control a water flow switch or control the flow of water flow.

In one embodiment, the sewage and filter screen 3 cleaning system further comprises a sewage suction motor 15 and an absorption device 16, the sewage suction motor 15 is connected with the sewage inlet 1 through a pipeline, and the sewage suction motor 15 drives the absorption device 16 to absorb the sewage and discharge the sewage to the sewage inlet 1. The sewage suction motor 15 is usually a fan, and the absorption device 16 is a water scraping strip/suction rake.

In one embodiment, the sewage and filter screen 3 cleaning system further comprises a third water pump 17, a clean water filter screen 18 and a washing device 19. The water inlet of the third water pump 17 is connected with the water outlet of the clean water tank 6 through a fourth pipeline 20; and the clear water filter screen 18 is arranged in the fourth pipeline 20, a water flow controller is also arranged on the fourth pipeline 20, and the cleaning device 19 is connected with the water outlet of the third water pump 17.

The system sucks sewage from a sewage inlet 1 into a sewage tank 2 by means of suction and the like. Firstly, the sewage enters a first-stage filter, namely a filter screen 3, the filter screen 3 can intercept larger solid garbage, such as paper scraps, small stones, hair or nails, and then the sewage enters a second-stage filter, namely the bottom of a sewage tank 2 for precipitation and filtration, and at the moment, smaller particles suspended in the sewage are subjected to static precipitation and adsorption and are left at the bottom and the side wall of the sewage tank 2.

When the control circuit 8 detects that the water level of the sewage tank 2 reaches the set water level height through the first water level sensor 12, the first water pump 4 and the water flow controller on the first pipeline 9 are started, and at the moment, the water flow controller on the second pipeline 10 and the third pipeline 11 and the second water pump 7 are kept in a closed or stop working state. After the first water pump 4 is started, sewage after secondary filtration is pumped out from the sewage tank 2, enters the three-stage filter-ultrafiltration membrane filter 5 through the water flow controller on the first pipeline 9, and filtered clean water enters the clean water tank 6 from the water outlet.

When the robot needs to clean the ground, the control circuit 8 controls the water flow controller on the fourth pipeline 20 to be opened, and clean water is pumped out from the water outlet of the clean water tank 6 and the clean water filter screen 18 by the third water pump 17 and flows into the cleaning device 19 after being filtered. The control circuit 8 controls the cleaning device 19 to lift and brush/mop the floor, clean water becomes ground sewage, and the sewage contains relatively large and heavy impurities (stones, paper pieces, plastic blocks and the like), large-particle dirt, tiny dust and the like. The control circuit 8 controls the absorption device 16 to descend to the ground, and then the sewage absorption water motor 15 is started to absorb sewage to the sewage inlet 1 and enter the filter screen 3. Thus, the cleaning waterway and the filtering waterway are connected together to form a water circulation system.

Referring to fig. 1 and 2, a second aspect of the embodiment of the present application provides a self-cleaning method for a filter based on the above-mentioned cleaning system for sewage and filter net 3, the self-cleaning method for a filter comprising:

step one, detecting a first water level of a sewage tank 2 and a second water level of a clean water tank 6;

and step two, if the water level is lower than the first preset value and the second water level is higher than the second preset value, starting a second water pump 7 to enable clean water to enter the ultrafiltration membrane filter 5 from the clean water tank 6 to flush the ultrafiltration membrane filter, and enabling water for flushing the ultrafiltration membrane filter 5 to flow out of a water inlet of the ultrafiltration membrane filter through a second pipeline 10 to flush the filter screen 3.

Specifically, after the ultrafiltration membrane filter 5 is filtered for a while, dirt is accumulated in the filter. The control circuit 8 can enter a filter self-cleaning program at regular time or receive instructions of other controllers (a main control board, an industrial personal computer, a mobile phone and the like) according to the working environment and the sewage condition.

The self-cleaning preconditions are that the robot has automatically or manually drained the sewage in the sewage tank 2 and that there is some clean water in the clean water tank 6. The control circuit 8 detects through the sensor that the sewage tank 2 does not have sewage, detects that there is the clear water level of setting for in the clear water tank 6, detects the first water level of sewage tank 2 promptly and is less than first default, detects the second water level of clear water tank 6 and is higher than second default. Thereafter, the second water pump 7 and the water flow control in the second and third pipes 10 and 11 are started while the water flow control in the first pipe 9, the first water pump 4, is kept in a stopped or closed state. At this time, the clean water is pumped into the second water pump 7 from the clean water tank 6, enters the ultrafiltration membrane filter 5 through the water flow controller on the third pipeline 11, washes dirt in the filter, and the clean water becomes sewage which flows into the filter screen 3 through the original water inlet to the water flow controller on the second pipeline 10. After the back flushing is completed, the back-flushed sewage can be discharged through the sewage outlet 13 manually or automatically.

According to the sewage and filter screen 3 cleaning system and the filter self-cleaning method, the ultrafiltration membrane filter 5 and the filter screen 3 can be self-cleaned by extracting the clean water from the clean water tank 6, so that the filter element does not need to be replaced periodically and manually, the sewage tank 2 does not need to be cleaned frequently and periodically, and the filter screen 3 is not easy to block.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. A sewage and filter screen cleaning system, comprising:

the sewage tank is provided with a filter screen opposite to the sewage inlet;

a water inlet of the first water pump is arranged in the box body of the sewage tank;

the water inlet of the ultrafiltration membrane filter is connected with the water outlet of the first water pump through a first pipeline, the water inlet of the ultrafiltration membrane filter is communicated with a second pipeline, and the outlet of the second pipeline is opposite to the filter screen;

the water outlet of the ultrafiltration membrane filter is opposite to the box body of the clean water box;

a water inlet of the second water pump is arranged in the box body of the clean water box, and a water outlet of the second water pump is connected with a sewage outlet of the ultrafiltration membrane filter through a third pipeline; and

and the control circuit is connected with the first water pump and the second water pump, and is used for controlling the first water pump to pump water in the sewage tank to the ultrafiltration membrane filter to discharge the water to the clean water tank after filtering and also used for controlling the second water pump to pump water in the clean water tank to the ultrafiltration membrane filter and the filter screen to clean the ultrafiltration membrane filter and the filter screen.

2. The sewage and filter screen cleaning system as claimed in claim 1, wherein the sewage tank is provided with a sewage discharge outlet and a first water level sensor connected to the control circuit.

3. The sewage and filter screen cleaning system according to claim 1, wherein a second water level sensor connected to the control circuit is provided on the clean water tank.

4. The sewage and filter screen cleaning system of claim 1, wherein a water flow controller is provided on each of the first conduit, the second conduit and the third conduit.

5. The sewage and filter screen cleaning system according to claim 1, further comprising a sewage suction motor and an absorption device, wherein the sewage suction motor is connected to the sewage inlet through a pipeline, and the sewage suction motor drives the absorption device to absorb sewage and discharge the sewage to the sewage inlet.

6. The sewage and filter screen cleaning system of claim 1, further comprising:

a water inlet of the third water pump is connected with a water outlet of the clean water tank through a fourth pipeline;

the clear water filter screen is arranged in the fourth pipeline; and

and the cleaning device is connected with the water outlet of the third water pump.

7. The sewage and filter screen cleaning system of claim 6, wherein a flow controller is provided on the fourth conduit.

8. A filter self-cleaning method based on the sewage and filtering net cleaning system of claim 1, wherein the filter self-cleaning method comprises:

detecting a first water level of the sewage tank and a second water level of the clean water tank;

and if the water level is lower than a first preset value and the second water level is higher than a second preset value, starting the second water pump to enable clean water to enter the ultrafiltration membrane filter from the clean water tank to flush the ultrafiltration membrane filter, and enabling water for flushing the ultrafiltration membrane filter to flow out of a water inlet of the ultrafiltration membrane filter and pass through the second pipeline to flush the filter screen.

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