CN115970380A - Automatic back flush filter - Google Patents

Abstract

The invention discloses an automatic backwashing filter. The filter element filters liquid to intercept impurities on the outer surface of the filter element, when the impurities on the outer surface of the filter element are excessive, when the pressure difference between the liquid inlet and the liquid outlet is larger than a threshold value, the controller can control the reversing valve to rotate, the inlet of the reversing valve is communicated with the inlet of any filter cavity, the discharge valve is opened, the filter cavity which is cleaned currently is under the pressure difference between the liquid outlet and a sewage drain, the filtered liquid can flow into the filter cavity which is cleaned currently, the impurities adsorbed on the surface of the filter element are washed away and discharged from the sewage drain, after the filter cavity which is cleaned currently is cleaned, the reversing valve rotates to be communicated with the inlet of the next filter cavity which needs to be cleaned, the operation is repeated, all filter cavities are cleaned, and finally the reversing valve rotates to be communicated with the inlet cavity. The utility model provides a filter integrated level is high, can realize self-cleaning when the impurity of filter core surface reaches certain stratification degree.

Description

Automatic back flush filter

Technical Field

The invention relates to the technical field of filtration, in particular to an automatic backwashing filter.

Background

The filter is an indispensable device on a medium conveying pipeline and is usually arranged on a pressure reducing valve, a pressure relief valve and a positioning water valve. When the filter works, after the medium to be treated passes through the filter element of the filter, impurities of the medium are blocked, and when the impurities are too much, the filter element can be gradually blocked, so that the filter cannot continue to perform filtering work, namely, the medium is continuously output, therefore, when the filter element is blocked, the filter can automatically clean the filter element, and further, the medium is continuously output.

In the prior art, a plurality of filter units are generally integrated on a multi-way reversing valve, the reversing valve rotates to select the filter unit to be backwashed, and then the backwashing valve is opened for backwashing, so that the self-cleaning of the filter element is completed.

However, since the conventional filter integrates a plurality of filter units on one multi-way reversing valve, the filter has flange connections of a plurality of pipelines, so that the installation process is complicated and the maintenance is inconvenient.

Disclosure of Invention

In view of this, an embodiment of the present invention provides an automatic backwashing filter, so as to solve the problems of a complex installation process and inconvenient maintenance caused by flange connection of a plurality of pipelines when a plurality of filter units of an existing filter are integrated on a multi-way reversing valve.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

an automatic backwash filter comprising: the device comprises a shell, a central pipeline, a reversing valve, a first partition plate, a second partition plate, a driver, a controller, a rotating shaft, a discharge valve, a first pressure sensor and a second pressure sensor;

the housing includes an upper portion and a lower portion;

the central pipeline is arranged in the lower part, the central pipeline and the lower part are coaxial, and an annular cavity is formed between the central pipeline and the lower part;

the first partition plates are arranged in the annular cavity along the circumferential direction of the central pipeline to form a plurality of cavities, wherein the cavities comprise at least one inlet and outlet cavity and a plurality of filtering cavities, and the filtering cavities are used for installing filter cores;

the reversing valve is arranged in the central pipeline;

the first end of the rotating shaft penetrates through the top end of the central pipeline and is connected with the reversing valve;

the driver is arranged at the top of the upper part and connected with the second end of the rotating shaft;

the lower part is provided with a liquid inlet and a liquid outlet, and the liquid inlet is positioned below the liquid outlet;

the second partition plate is arranged in the inlet cavity and the outlet cavity to form an inlet cavity and an outlet cavity, the liquid inlet is communicated with the inlet cavity, the liquid outlet is communicated with the outlet cavity, and the outlet cavity is communicated with the outlet of the filtering cavity through the upper part;

the first pressure sensor is arranged at the liquid inlet, the second pressure sensor is arranged at the liquid outlet, and the first pressure sensor and the second pressure sensor are both connected with the controller;

the outlet of the reversing valve is communicated with a sewage draining port arranged at the bottom of the lower part, the drain valve is arranged at the sewage draining port and is connected with the controller, and the controller can control the drain valve to be opened or closed;

when the pressure difference measured by the first pressure sensor and the second pressure sensor is greater than a preset value, the controller controls the driver to drive the rotating shaft to drive the reversing valve to rotate, so that the inlet of the reversing valve is communicated with the outlet of the inlet chamber arranged in the central pipeline or the inlet of any filtering chamber, and when the inlet of the reversing valve is communicated with the inlet chamber, the outlet of the inlet chamber is also communicated with the central pipeline.

Preferably, the plurality of first partition plates are arranged along the circumference of the central pipe at preset intervals.

Preferably, the housing is of cylindrical construction.

Preferably, a plurality of water outlets are arranged in the vertical direction of the contact surface of the outlet chamber and the central pipeline.

Preferably, a vertical seam water outlet is arranged in the vertical direction of the contact surface of the outlet chamber and the central pipeline.

Preferably, the air conditioner further comprises an air outlet arranged at the upper part.

Preferably, the device further comprises a positioner arranged on the rotating shaft.

Preferably, the drive is a geared motor.

Preferably, the sealing structure further comprises a sealing structure of the rotating shaft arranged at the contact position of the rotating shaft and the central pipeline.

From the above, the invention discloses an automatic back-flushing filter, in a normal filtering state of the filter, an outlet of an inlet chamber is respectively communicated with an inlet of a reversing valve and a central pipeline, a discharge valve is closed, so that liquid can only flow into a filtering chamber from the inlet of the filtering chamber through the central pipeline, a filter element of the filtering chamber filters the liquid and intercepts impurities on the outer surface of the filter element, the filtered liquid flows into an outlet chamber from an outlet of the filtering chamber, finally the filtered liquid is conveyed outwards through the outlet chamber, and when the impurities on the outer surface of the filter element are excessive, the liquid is not easy to pass through the filter element, therefore, when the pressure difference measured by a first pressure sensor arranged at a liquid inlet and a second pressure sensor arranged at a liquid outlet is greater than a threshold value, a controller can control a driver to drive a rotating shaft to drive the reversing valve to rotate, the inlet of the reversing valve is communicated with the inlet of one filtering chamber (the currently cleaned filtering chamber) in the plurality of filtering chambers, the controller controls the discharge valve to be opened, other filtering chambers are in a normal filtering state at the moment, clean liquid flowing out of the other filtering chambers flows in from the outlet of the currently cleaned filtering chamber under the pressure difference between the liquid outlet and the sewage outlet, then impurities adsorbed on the surface of the filter element are washed away through the inlet of the currently cleaned filtering chamber, the washed impurities flow into the inlet of the reversing valve along with the liquid and are discharged from the sewage outlet, after the impurity cleaning of the filter element in the currently cleaned filtering chamber is finished, the sewage outlet valve is closed, then the controller controls the driver to drive the rotating shaft to rotate to drive the reversing valve to rotate, so that the inlet of the reversing valve is communicated with the inlet of the next filtering chamber to be cleaned, and finally, the controller controls the driver to drive the rotating shaft to drive the reversing valve to rotate so as to align the inlet of the reversing valve with the inlet chamber until all the filtering chambers are cleaned. The utility model provides a filter integrated level is high, can realize self-cleaning when the impurity of filter core surface reaches certain stratification degree, and this application is compared in prior art, and a plurality of filter unit no longer need a plurality of pipelines to carry out flange joint, and then has simplified staff's installation for this filter later maintenance becomes more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an automatic backwashing filter according to an embodiment of the present invention;

fig. 2 is a sectional view of an automatic backwashing filter according to an embodiment of the present invention.

Wherein, the shell 11, the upper part 111 and the lower part 112; the filter comprises a central pipeline 12, a reversing valve 13, a first partition plate 14, a second partition plate 15, a driver 16, a rotating shaft 17, an inlet cavity and an outlet cavity 18, an inlet cavity 181, an outlet cavity 182, a liquid inlet 183, a liquid outlet 184, a filtering cavity 19, a filter element 20, a sewage outlet 21, an exhaust port 22, a positioner 23 and a rotating shaft sealing structure 24.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

An embodiment of the present invention provides an automatic backwashing filter, and referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of the automatic backwashing filter, and the automatic backwashing filter includes: the device comprises a shell 11, a central pipeline 12, a reversing valve 13, a first partition plate 14, a second partition plate 15, a driver 16, a controller, a rotating shaft 17, a discharge valve, a first pressure sensor and a second pressure sensor;

the reversing valve 13 is arranged in the central pipeline 12;

a first end of the rotating shaft 17 passes through the top end of the central pipeline 12 and is connected with the reversing valve 13;

the driver 16 is arranged on the top of the upper part 111 and connected with the second end of the rotating shaft 17;

the lower part 112 is provided with a liquid inlet 183 and a liquid outlet 184, and the liquid inlet 183 is positioned below the liquid outlet 184;

the second partition 15 is disposed in the inlet-outlet chamber 18218 to form an inlet chamber 181 and an outlet chamber 182, the inlet 183 is communicated with the inlet chamber 181, the outlet 184 is communicated with the outlet chamber 182, and the outlet chamber 182 is communicated with the outlet of the filtering chamber 19 through the upper portion 111;

the first pressure sensor is arranged at the liquid inlet 183, the second pressure sensor is arranged at the liquid outlet 184, and the first pressure sensor and the second pressure sensor are both connected with the controller;

the outlet of the reversing valve 13 is communicated with a sewage draining port 21 arranged at the bottom of the lower part 112, a drain valve is arranged at the sewage draining port 21 and is connected with a controller, and the controller can control the drain valve to be opened or closed;

when the pressure difference measured by the first pressure sensor and the second pressure sensor is greater than the preset value, the controller controls the driver 16 to drive the rotating shaft 17 to drive the reversing valve 13 to rotate, so that the inlet of the reversing valve 13 is communicated with the outlet of the inlet chamber 181 arranged in the central pipeline 12 or the inlet of any filtering chamber 19, wherein when the inlet of the reversing valve 13 is communicated with the inlet chamber 181, the outlet of the inlet chamber 181 is also communicated with the central pipeline 12.

It should be noted that, with the above-disclosed solution, in a normal filtering state of the filter, the outlet of the inlet chamber 181 is respectively communicated with the inlet of the direction valve 13 and the central pipe 12, the discharge valve is closed, so that the liquid can only flow into the filtering chamber 19 from the inlet of the filtering chamber 19 through the central pipe 12, the filter element 20 of the filtering chamber 19 filters the liquid, and intercepts impurities on the outer surface of the filter element 20, the filtered liquid flows into the outlet chamber 182 from the outlet of the filtering chamber 19, and finally the filtered liquid is conveyed outwards through the outlet chamber 182, and when the impurities on the outer surface of the filter element 20 are excessive, the liquid is not easy to pass through the filter element 20, therefore, when the pressure difference measured by the first pressure sensor arranged at the liquid inlet 183 and the second pressure sensor arranged at the liquid outlet 184 is greater than the threshold value, the controller controls the driver 16 to drive the rotating shaft 17 to rotate the direction valve 13, the inlet of the reversing valve 13 is communicated with the inlet of one filtering chamber 19 (the currently cleaned filtering chamber 19) in the plurality of filtering chambers 19, the controller controls the discharge valve to open, at the moment, the other filtering chambers 19 are still in a normal filtering state, under the pressure difference between the liquid outlet 184 and the sewage discharge outlet 21 of the currently cleaned filtering chamber 19, clean liquid flowing out of the other filtering chambers 19 flows in from the outlet of the currently cleaned filtering chamber 19, then impurities adsorbed on the surface of the filter element 20 are washed away through the inlet of the currently cleaned filtering chamber 19, the washed impurities flow into the inlet of the reversing valve 13 along with the liquid, then the impurities are discharged from the sewage discharge outlet 21, and after the impurity cleaning of the filter element 20 in the currently cleaned filtering chamber 19 is finished, the controller controls the driver 16 to drive the rotating shaft 17 to rotate to drive the reversing valve 13 to rotate, so that the inlet of the reversing valve 13 is communicated with the inlet of the next filtering chamber 19 to be cleaned, in this way, until all the filtering chambers 19 are cleaned, the controller finally controls the driver 16 to drive the rotating shaft 17 to rotate the reversing valve 13, so that the inlet of the reversing valve 13 is communicated with the inlet chamber 181. The utility model provides a filter integrated level is high, can realize self-cleaning when the impurity of filter core 20 surface reaches certain stratification degree, and this application is compared in prior art, and a plurality of filter unit no longer need a plurality of pipelines to carry out flange joint, and then has simplified staff's installation for this filter later maintenance becomes more convenient.

Further, a plurality of first partitions 14 are circumferentially arranged along the central tube 12 at predetermined intervals.

It should be noted that, the plurality of first partition plates 14 are circumferentially arranged along the central pipeline 12 according to a preset interval, so that the size of the formed space of the filtering chamber 19 can be kept consistent, and further, the filter elements 20 with the same specification can be installed, thereby facilitating the purchase and installation of the filter elements 20 and avoiding the problem of the reduction of the installation efficiency of the filter elements 20 caused by the different specifications of the filter elements 20.

Specifically, the housing 11 is a cylindrical structure.

It should be noted that the housing 11 may have a cylindrical structure or a polygonal columnar structure, and thus the shape of the housing 11 is not limited to the cylindrical structure.

Further, a plurality of water outlets are arranged in the vertical direction on the contact surface of the outlet chamber 182 and the central pipe 12.

It should be noted that a plurality of water outlets are arranged in the vertical direction of the contact surface between the outlet chamber 182 and the central pipe 12, and then when the filter is in a normal filtering state, a part of the water outlets of the inlet chamber 181 can be communicated with the inlet of the reversing valve 13, and another part of the water outlets can be communicated with the central pipe 12, and when the filter element 20 in the filtering chamber 19 needs to be cleaned, and the inlet of the reversing valve 13 is communicated with the inlet of the currently cleaned filtering chamber 19, a part of the water outlets of the outlet chamber 182 can be communicated with the central pipe 12, and then other filtering chambers 19 can also filter liquid normally, so that enough filtered liquid can enter the currently cleaned filtering chamber 19 to clean the filter element 20 in the currently cleaned filtering chamber 19.

Specifically, the contact surface of the outlet chamber 182 and the central pipe 12 is provided with a vertical seam water outlet in the vertical direction.

It should be noted that, by providing the vertical seam water outlet on the contact surface between the outlet chamber 182 and the central pipe 12, when the filter is in a normal filtering state, part of the vertical seam water outlet of the inlet chamber 181 can be communicated with the inlet of the directional valve 13, and the other part of the vertical seam water outlet can be communicated with the central pipe 12, and when the filter element 20 in the filtering chamber 19 needs to be cleaned, and the inlet of the directional valve 13 is communicated with the inlet of the currently cleaned filtering chamber 19, part of the vertical seam water outlet of the outlet chamber 182 can be communicated with the central pipe 12, so that the other filtering chambers 19 can also filter liquid normally, and then enough filtered liquid can enter the currently cleaned filtering chamber 19 to clean the filter element 20 in the currently cleaned filtering chamber 19.

Further, the automatic backwashing filter also comprises an exhaust port 22 arranged on the upper part 111.

By providing the exhaust port 22 in the upper part 111, the pressure in the case can be removed by opening the exhaust port 22 when the filter element 20 needs to be replaced.

Further, the automatic backwashing filter also comprises a positioner 23 arranged on the rotating shaft 17.

It should be noted that, by arranging the positioner 23 on the rotating shaft 17, when the rotating shaft 17 drives the reversing valve 13 to rotate, the rotating shaft 17 can be positioned to enable the inlet of the reversing valve 13 to be accurately communicated with the outlet of the inlet chamber 181 arranged in the central pipeline 12 or the inlet of any filtering chamber 19 once the rotating shaft 17 rotates, so that when the filter element 20 in the filtering chamber 19 is cleaned, the impurities cleaned from the filter element 20 can be ensured to be removed from the sewage outlet 21.

Specifically, the driver 16 is a reduction motor.

It should be noted that the driver 16 may be a speed reduction motor, or may be another type of motor, and those skilled in the art can select the motor according to the requirement.

Further, the automatic backwashing filter also comprises a rotating shaft sealing structure 24 arranged at the contact part of the rotating shaft 17 and the central pipeline 12.

It should be noted that, by providing the rotary shaft sealing structure 24 at the contact position of the rotary shaft 17 and the central pipeline 12, the sealing structure can seal the contact position of the rotary shaft 17 and the central pipeline 12, so as to prevent the liquid in the central pipeline 12 from directly entering the upper part 111 of the housing 11 without being filtered and then being discharged from the outlet chamber 182, thereby effectively ensuring that no impurity exists in the filtered liquid.

To facilitate understanding of the above solution, the solution is further described below with reference to fig. 1 and 2.

The interior of the annular cavity formed by the filter and the central pipeline 12 is divided into 7 independent chambers, wherein the chambers 1 to 6 are used for filtering, the filter element 20 is arranged in each chamber 1 to 6, and the chamber 7 is used for arranging inlet and outlet channels. Liquid flows from the inlet into the central conduit 12 and down into the 6 filter chambers 19. Liquid permeates the filter element 20 from the outside inward and particulate contaminants are trapped on the outer surface of the filter element 20. The back washing sewage outlet 21 is connected with an automatic back washing discharge valve, and the discharge valve is kept closed when the filter is normally used for filtering.

After a certain period of filter operation, all the filter elements 20 are gradually blocked, and the pressure difference between the inlet chamber 181 and the outlet chamber 182 reaches the preset value for starting the backwashing. The control system starts the back washing sequence action. The positioner 23 below the speed reducing motor and the bottom multi-channel back-flushing reversing valve 13 are fixed on the same shaft. The positioner 23 allows the diverter valve 13 at the bottom of the central tube to be aligned with the inlet of the filter chamber 19 one by one and then opens the backwash discharge valve. The differential pressure between the discharge valve and the filter outlet drives the filtered clean liquid to flow in a high-speed reverse direction, so that impurities on the surface of the filter element 20 are washed away, enter the reversing valve 13 and finally flow out of the back-washing discharge valve. The cleaning process is continued for a period of time, i.e. after the cleaning is completed, then the discharge valves are closed; then, after the reversing valve 13 is aligned with the next filtering chamber 19, the next filtering chamber 19 is cleaned until all the filtering chambers 19 are cleaned one by one, and the back-flushing sequence is finished. Finally the reversing valve 13 is directed to the inlet chamber 181 and the six filtering chambers 19 continue to perform the filtering operation.

The filter has the advantages of compact and simple structure, saving of a large amount of occupied space, no need of a large amount of filter units, valves, pipe fittings and sealing parts to form a filter system, extremely low leakage risk, safety and reliability, obvious advantages of high-temperature and high-pressure or dangerous medium filtering technology, remarkable improvement of filtering processing capacity and reduction of equipment investment cost.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An automatic backwash filter, comprising: the device comprises a shell, a central pipeline, a reversing valve, a first partition plate, a second partition plate, a driver, a controller, a rotating shaft, a discharge valve, a first pressure sensor and a second pressure sensor;

the housing includes an upper portion and a lower portion;

the central pipeline is arranged in the lower part, the central pipeline and the lower part are coaxial, and an annular cavity is formed between the central pipeline and the lower part;

the first partition plates are arranged in the annular cavity along the circumferential direction of the central pipeline to form a plurality of chambers, wherein the chambers comprise at least one inlet and outlet chamber and a plurality of filtering chambers, and the filtering chambers are used for installing filter elements;

the reversing valve is arranged in the central pipeline;

the first end of the rotating shaft penetrates through the top end of the central pipeline and is connected with the reversing valve;

the driver is arranged at the top of the upper part and is connected with the second end of the rotating shaft;

the lower part is provided with a liquid inlet and a liquid outlet, and the liquid inlet is positioned below the liquid outlet;

the second partition plate is arranged in the inlet cavity and the outlet cavity to form an inlet cavity and an outlet cavity, the liquid inlet is communicated with the inlet cavity, the liquid outlet is communicated with the outlet cavity, and the outlet cavity is communicated with the outlet of the filtering cavity through the upper part;

the first pressure sensor is arranged at the liquid inlet, the second pressure sensor is arranged at the liquid outlet, and the first pressure sensor and the second pressure sensor are both connected with the controller;

the outlet of the reversing valve is communicated with a sewage draining port arranged at the bottom of the lower part, the drain valve is arranged at the sewage draining port, the drain valve is connected with the controller, and the controller can control the drain valve to be opened or closed;

when the pressure difference measured by the first pressure sensor and the second pressure sensor is larger than a preset value, the controller controls the driver to drive the rotating shaft to drive the reversing valve to rotate, so that the inlet of the reversing valve is communicated with the outlet of the inlet chamber arranged in the central pipeline or the inlet of any filtering chamber, and when the inlet of the reversing valve is communicated with the inlet chamber, the outlet of the inlet chamber is also communicated with the central pipeline.

2. The automatic backwash filter according to claim 1, wherein a plurality of the first partition plates are arranged at a predetermined interval along a circumferential direction of the central duct.

3. The automatic backwash filter of claim 1, wherein the housing is of cylindrical construction.

4. The automatic backwashing filter of claim 1, wherein a plurality of water outlets are formed in a vertical direction on a contact surface of the outlet chamber and the central pipe.

5. The automatic backwash filter as in claim 1, wherein the outlet chamber is provided with a perk outlet in a vertical direction of a contact surface with the central pipe.

6. The automatic backwash filter according to claim 1, further comprising an exhaust port provided in the upper portion.

7. The automatic backwash filter according to claim 1, further comprising a retainer provided to the rotating shaft.

8. The automatic backwash filter of claim 1, wherein the drive is a speed reduction motor.

9. The automatic backwash filter according to claim 1, further comprising a rotary shaft sealing structure provided at a position where the rotary shaft contacts the center pipe.

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