A self-cleaning screen filter

Abstract

The application relates to a self-cleaning screen filter, which comprises a clean water cavity, a water outlet pipe being arranged on the side of the clean water cavity in communication, a sewage cavity, a water inlet pipe, a water flow oscillator and a sewage collector being arranged on the side of the sewage cavity in communication, the water flow oscillator and the sewage collector being arranged opposite to each other, the water inlet pipe and the water flow oscillator being located on the same vertical line, a water blocking cover, not less than two filter screens being arranged on the inner side of the cover body of the water blocking cover, a sewage discharge port being arranged above each filter screen on the side of the water blocking cover, a water inlet being arranged on the side of the water blocking cover opposite to each sewage discharge port, and a lifting mechanism; wherein the clean water cavity and the sewage cavity are fastened and connected through threads, the lifting mechanism is arranged in the sewage cavity and is connected with the water blocking cover and the top of the clean water cavity; the water blocking cover is slidingly connected in the sewage cavity and the water inlet of the water blocking cover can be communicated with the water flow oscillator and the sewage discharge port can be communicated with the sewage collector during the up-down sliding of the water blocking cover; the self-cleaning screen filter is simple to use, efficient, clean and simple in structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtering equipment, in particular to a self-cleaning screen filter. BACKGROUND

[0002] The screen filter is a commonly used pipeline filtering equipment, which mainly captures solid particles in fluid through a filter screen or a filter basket to protect the normal operation of the pipeline and equipment. It can be used to filter various media such as water, oil, corrosive media, etc., and its main function is to prevent solid particles from entering the downstream equipment and pipeline, prevent blockage and damage, and thus protect the normal operation of pumps, nozzles, instruments and other key equipment, and improve the reliability and stability of the system.

[0003] In the prior art, the screen filter has many defects, such as:

[0004] 1. The specifications of the filter screen in the screen filter (mesh size, filter area) are fixed, and as the filtering time is prolonged, the impurities filtered out are deposited on the filter screen more and more, which gradually reduces the effective filtering area, which may cause the pipeline resistance to become larger and larger, the working efficiency to become lower and lower, and even cause pipeline blockage and equipment safety accidents, at which time cleaning is required.

[0005] 2. The screen filter is usually connected with the pipeline, and when blockage occurs, dredging is required. In order to ensure normal use, the deposited dirt on the filter screen must be removed regularly. The cleaning of the existing filter is divided into two types, one of which is to stop the machine and take out the filter screen for cleaning, and the other is to clean by semi-automatic or automatic flushing or backwashing through the connection of the water pipe. Stopping the machine to take out the filter screen for cleaning affects the long-period operation of the system, and the semi-automatic or automatic flushing or backwashing cleaning method has a complex pipeline design, resulting in an overly bulky device. The flushing cleaning through the water flow in the pipeline is not thorough, and the particles generated by the cleaning are not easy to discharge. SUMMARY

[0006] To solve or partially solve the problems in the related art, the present application provides a self-cleaning screen filter which is simple and efficient to use, completely clean, and simple in structure.

[0007] The present application discloses a self-cleaning screen filter, comprising:

[0008] a clean water cavity, a water outlet pipe is communicated on the side surface of the clean water cavity; and

[0009] a sewage cavity, a water inlet pipe, a water flow oscillator and a sewage collector are communicated on the side surface of the sewage cavity, the water flow oscillator and the sewage collector are oppositely arranged, and the water inlet pipe and the water flow oscillator are located on the same vertical line; and

[0010] A water retaining cover, wherein the inner side of the water retaining cover is connected to at least two filter screens, a sewage outlet is constructed above each filter screen on the side of the water retaining cover, and a water inlet is constructed on the side of the water retaining cover facing each sewage outlet; and

[0011] Lifting mechanism;

[0012] The clean water chamber and the sewage chamber are fastened together by screw threads, and the lifting mechanism is arranged on the top of the sewage chamber. The lifting mechanism is connected to the water shield and is located on the top of the clean water chamber.

[0013] The water shield is slidably arranged in the sewage cavity and enables the water inlet of the water shield to be connected with the water flow oscillator and the sewage outlet to be connected with the sewage collector during the up and down sliding process of the water shield.

[0014] Optionally, the filter screen includes a first filter screen and a second filter screen, the sewage outlet includes a first sewage outlet and a second sewage outlet, and the water inlet includes a first water inlet and a second water inlet;

[0015] Among them, the first filter screen and the second filter screen are connected to the inner side of the cover body of the water shield, the first sewage outlet is constructed above the first filter screen on the side of the water shield, and the second sewage outlet is constructed above the second filter screen on the side of the water shield. The first water inlet is constructed on the side of the water shield facing the first sewage outlet, and the second water inlet is constructed on the side of the water shield facing the second sewage outlet; the water shield is slidably arranged in the sewage chamber and enables the first water inlet and the second water inlet to be connected to the water flow oscillator during the up and down sliding process of the water shield, and the first sewage outlet and the second sewage outlet can be connected to the sewage collector.

[0016] Optionally, the lifting mechanism includes an electric motor, a screw, and a movable slider. The movable slider is fixedly set at the top and bottom of the water shield. The electric motor is connected to the top outside the sewage chamber. The screw is connected to the rotating shaft of the electric motor and transferred to the movable slider to construct a screw slider mechanism.

[0017] Optionally, the water inlet and the sewage outlet are arranged close to the top of the filter screen.

[0018] Optionally, the sewage outlet is configured to be in a strip shape.

[0019] Optionally, the sewage collector is configured as a block-shaped triangle, with the opposite side of one corner being connected to and in conduction with the sewage chamber.

[0020] Optionally, the water flow oscillator is configured to be bottle-shaped, with a water inlet connected to one end of the bottle mouth and a water outlet connected to one end of the bottle bottom, and L-shaped side flow channels symmetrically arranged on both sides of the bottle mouth, and the other end of the side flow channel is connected to the middle and lower part of the bottle.

[0021] Optionally, the corner of the side channel is set to be arc-shaped; the bottom of the water flow oscillator is set to be arc-shaped.

[0022] Optionally, a manual valve is arranged at the water inlet end of the water flow agitator, a manual valve is arranged at the water outlet end of the sewage collector, and manual valves are arranged on the water inlet pipe and the water outlet pipe.

[0023] Optionally, the manual valves are replaced by electromagnetic valves, and a controller is arranged on the sewage chamber and is electrically connected with the electric motor and the electromagnetic valves.

[0024] The technical scheme provided in the application can have the following beneficial effects.

[0025] The device uses the water flow agitator and the sewage collector to clean the filter screens, and uses the lifting mechanism to pull the filter screens to change the positions of the filter screens for cleaning, so that the device only has two water inlet and outlet pipes, and the cleaning of multiple filter screens can be realized, and the use of external pipes is reduced. Meanwhile, the device has a simple structure, and the water flow agitator, the sewage collector, the lifting mechanism and the water baffle are used to realize multi-layer filtration without increasing the complexity of the device and facilitating cleaning, and the device is not bulky and is convenient to use.

[0026] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the different views of the drawings.

[0028] Figure 1 is a structural schematic diagram of an embodiment of the application;

[0029] Figure 2 is a front view of an embodiment of the application;

[0030] Figure 3 is a bottom view of an embodiment of the application;

[0031] Figure 4 is an A-A sectional view of an embodiment of the application;

[0032] Figure 5 is a B-B sectional view of an embodiment of the application;

[0033] Figure 6 is a C-C sectional view of an embodiment of the application;

[0034] Figure 7 is a D-D sectional view of an embodiment of the application;

[0035] Figure 8This is a simulation diagram of the use of a water flow oscillator shown in an embodiment of the present application;

[0036] Reference numerals:

[0037] 1. Clean water chamber; 11. Water outlet pipe;

[0038] 2. Sewage chamber; 21. Water flow oscillator; 22. Sewage collector; 23. Water inlet pipe; 24. Electric motor; 25. Screw; 26. Moving slider;

[0039] 3. Water shield; 31. First sewage outlet; 32. Second sewage outlet; 33. First water inlet; 34. Second water inlet; 35. First filter; 36. Second filter;

[0040] 211. Water inlet; 212. Water outlet; 213. Side channel; 214. Oscillation cavity; 215. Co-oscillation cavity. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0042] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0045] In response to the above problems, an embodiment of the present application provides a self-cleaning mesh filter. The technical solution of the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0046] like Figure 1 and Figure 2 A self-cleaning mesh filter is shown, comprising:

[0047] The clean water chamber 1 is connected to the side of the clean water chamber 1 and is provided with an outlet pipe 11. The filtered clean water source is transported to other places through the outlet pipe 11. The present application also includes a sewage chamber 2. The sewage chamber 2 is connected to the side with an inlet pipe 23 for inputting raw water into the filter. The sewage chamber 2 is connected to the side with a water flow oscillator 21 and a sewage collector 22. The water flow oscillator 21 and the sewage collector 22 are arranged opposite each other, and the inlet pipe 23 and the water flow oscillator 21 are located on the same vertical line. The water flow oscillator is also a fluid oscillator. It can make the liquid passing through it oscillate automatically, similar to a sine function, so that the water flow oscillates, thereby achieving the purpose of sweeping and cleaning the particulate impurities on the filter screen, and these impurities are cleaned into the sewage collector 22 and then collected and discharged uniformly. In this way, the filter screen is cleaned thoroughly, and the cleaning efficiency and discharge effect are high. The present application also includes a water shield 3, with at least two filter screens connected to the inner side of the shield body. The filter screens are arranged in layers from top to bottom, and different filter mesh sizes can be set as needed. A sewage outlet is constructed above each filter screen on the side of the water shield 3 to facilitate the discharge of sewage during cleaning. A water inlet is constructed on the side of the water shield 3 opposite each sewage outlet to facilitate the intake of water for cleaning. The present application also includes a lifting mechanism.

[0048] In this application, the clean water chamber 1 and the sewage chamber 2 are fastened by threads for easy disassembly and maintenance. The lifting mechanism is arranged in the sewage chamber 2 and connects the water shield 3 and the top of the clean water chamber 1; the water shield 3 is slidably arranged in the sewage chamber 2 and allows the water inlet of the water shield 3 to be connected to the water flow oscillator 21 during the up and down sliding process, and the sewage outlet can be connected to the sewage collector 22.

[0049] Thus, in the present application, when in use, the water flow oscillator 21 and the sewage collector 22 are in a closed non-working state, and the lifting mechanism is in a retracted state. At this time, sewage enters the sewage chamber 2 from the water inlet pipe 23, and then enters the cover of the water shield 3 through the upper water inlet on the water shield 3, and then is filtered through the filter and output from the outlet pipe 11. When cleaning is required, the lifting mechanism works, the water shield 3 is pushed down, the water flow oscillator 21 and the sewage collector 22 are opened and connected, the water inlet pipe 23 is closed or blocked by the top partition of the water shield 3, and the water flow oscillator 21 works to sweep and clean the surface of the filter, and the cleaned particles are discharged from the sewage collector 22. After each filter is cleaned, the telescopic mechanism extends a distance until all the filters are cleaned, and then the equipment returns to its position and continues to work.

[0050] This device uses a water flow oscillator 21 and a sewage collector 22 to sweep and clean each filter screen, and uses a lifting mechanism to pull the filter screen to exchange positions for easy cleaning. The entire device has only two sets of water inlet and outlet pipes, which can achieve the cleaning of multiple filter screens and reduce the use of external pipes. At the same time, the overall structure of this application is simple. By utilizing the water flow oscillator 21 and the sewage collector 22, the lifting mechanism, and the water shield 3, it can achieve multi-layer filtration without increasing the complex structure of the equipment and is easy to clean, reducing the bloatedness of the equipment and making it easy to use.

[0051] In one embodiment, Figure 3 、 Figure 4 、 Figure 5 and Figure 6 A self-cleaning mesh filter is shown, wherein the filter screen includes a first filter screen 35 and a second filter screen 36, the sewage outlet includes a first sewage outlet 31 and a second sewage outlet 32, and the water inlet includes a first water inlet 33 and a second water inlet 34;

[0052] Among them, the first filter screen 35 and the second filter screen 36 are connected to the inner side of the cover body of the water shielding cover 3, the first sewage outlet 31 is constructed above the first filter screen 35 on the side of the water shielding cover 3, and the second sewage outlet 32 ​​is constructed above the second filter screen 36 on the side of the water shielding cover 3. The first water inlet 33 is constructed on the side of the water shielding cover 3 facing the first sewage outlet 31, and the second water inlet 34 is constructed on the side of the water shielding cover 3 facing the second sewage outlet 32; the water shielding cover 3 is slidably arranged in the sewage chamber 2 and enables the first water inlet 33 and the second water inlet 34 to be connected to the water flow oscillator 21 during the up and down sliding process of the water shielding cover 3, and the first sewage outlet 31 and the second sewage outlet 32 ​​can be connected to the sewage collector 22. The lifting mechanism includes an electric motor 24, a screw 25, and a movable slider 26. The movable slider 26 is fixedly arranged at the top and bottom of the water shield 3. The electric motor 24 is connected to the top outside the sewage chamber 2. The screw 25 is connected to the rotating shaft of the electric motor 24 and is transferred to the movable slider 26 to construct a screw slider mechanism.

[0053] Thus, the present application sets up two layers of filter screens, and sets two sewage outlets and water inlets for each of the two layers of filter screens. The entire water shield 3 is pulled up and down by a screw slider mechanism, and the design structure is simple and practical.

[0054] This device uses a water flow oscillator 21 and a sewage collector 22 to sweep and clean the first filter screen 35 and the second filter screen 36, and uses an electric motor 24 to drive the screw slider mechanism to pull the entire water shield 3 to move, thereby driving the first filter screen 35 and the second filter screen 36 to move up and down for easy cleaning. The entire device has only two sets of water inlet and outlet pipes, which can achieve the cleaning of the two filter screens and reduce the use of external pipes. At the same time, the overall structure of this application is simple. By utilizing the water flow oscillator 21, the sewage collector 22, the lifting mechanism and the water shield 3, multi-layer filtration can be achieved without increasing the complex structure of the equipment and it is easy to clean, reducing the bloat of the equipment and being easy to use.

[0055] In one embodiment, Figure 4 、 Figure 5 and Figure 6 As shown, the water inlet and the sewage outlet are set close to the top of the filter screen to facilitate the sweeping cleaning of the water flow oscillator 21 and the collection and discharge of sewage by the sewage collector 22.

[0056] In one embodiment, Figure 7 As shown, the sewage outlet is set to be long strip, and the sewage collector 22 is set to be a block triangle, and the opposite side of one corner is connected and conducted to the sewage chamber 2, so that the collection area is large and the collection and discharge are convenient.

[0057] In one embodiment, Figure 7As shown, the water flow oscillator 21 of the present application is a key cleaning component. During the cleaning process, in order to provide a better agitated water flow, the water flow oscillator 21 of the present application is configured to form a bottle-like coupling cavity. A water inlet 211 is connected to one end of the bottle mouth. The water inlet 211 is connected to a water outlet 212 at one end of the bottle bottom, which has the same diameter as the water pipe. L-shaped side flow channels 213 or feedback channels are symmetrically provided on both sides of the bottle mouth. The other end of the side flow channel 213 is connected to the middle and lower part of the bottle. The corner of the side flow channel 213 is configured to be arc-shaped; the bottle-shaped bottom of the water flow oscillator 21, i.e., the water outlet, is configured to be arc-shaped. In this way, the water flow oscillator 21 consists of only one inlet, one outlet, two feedback channels, and one coupling cavity. It does not have any moving or electromagnetic components and has high stability, robustness, and anti-electromagnetic interference capabilities. Affected by the Coanda effect of the fluid, after the main jet enters the coupling cavity, the jet randomly adheres to the wall on one side. Under the action of the coupling cavity, part of the fluid on the wall will enter the feedback channel and form a separation bubble on the other side. The jet entering the coupling cavity pushes the main jet to the wall of the other coupling cavity at the inlet, and this cycle repeats to form a periodic sweeping jet at the outlet. Through simulation, the water flow oscillator 21 of this structure oscillates at an angle greater than 90 degrees during use, and there is basically no speed attenuation between the inlet velocity and the outlet velocity when the liquid oscillates through the oscillator. Figure 8 As shown, the inlet velocity is 15m / s, and the outlet velocity is basically maintained at 15m / s. There is basically no speed attenuation when the liquid oscillates through the oscillator, and the oscillation angle reaches 110°, and the oscillation area is wider.

[0058] In one embodiment, in order to facilitate manual semi-automatic cleaning, a manual valve is connected to the water inlet end 211 of the water flow oscillator 21, a manual valve is connected to the water outlet end of the sewage collector 22, and manual valves are provided on the water inlet pipe 23 and the water outlet pipe 11. When in use, semi-automatic cleaning can be achieved by switching the corresponding valves and turning on the power of the top electric motor 24.

[0059] In one embodiment, a more automatic method is to replace the manual valve with a solenoid valve, and a controller is provided on the sewage chamber 2 and connected to the electric motor 24 and each solenoid valve. The controller automatically controls the opening and closing of each valve and the automatic operation of the electric motor 24 to achieve automatic self-cleaning.

[0060] Finally, it should be noted that, in this document, relationships such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms include, comprise, or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0062] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A self-cleaning screen filter, characterized in that: include: A clean water chamber (1), wherein a water outlet pipe (11) is provided on the side of the clean water chamber (1); and A sewage chamber (2), wherein a water inlet pipe (23), a water flow oscillator (21) and a sewage collector (22) are connected to the side of the sewage chamber (2), and the water flow oscillator (21) and the sewage collector (22) are arranged opposite each other, and the water inlet pipe (23) and the water flow oscillator (21) are located on the same vertical line; and A water shield (3), wherein at least two filter screens are connected to the inner side of the shield body of the water shield (3), a sewage outlet is constructed above each filter screen on the side of the water shield (3), and a water inlet is constructed on the side of the water shield (3) facing each sewage outlet; and Lifting mechanism; The clean water chamber (1) and the sewage chamber (2) are connected by screw threads, the lifting mechanism is arranged at the top of the sewage chamber (2), the lifting mechanism is connected to the water shield (3) and is located at the top of the clean water chamber (1); the lifting mechanism includes an electric motor (24), a screw (25), and a movable slider (26); the movable slider (26) is fixedly arranged at the top and bottom of the water shield (3); the electric motor (24) is connected to the top of the outside of the sewage chamber (2); the screw (25) is connected to the rotating shaft of the electric motor (24) and transferred to the movable slider (26) to form a screw slider mechanism; The water shield (3) is slidably arranged in the sewage chamber (2) so that the water inlet can be connected to the water flow oscillator (21) and the sewage outlet can be connected to the sewage collector (22) during the upward and downward sliding process of the water shield (3); The filter screen includes a first filter screen (35) and a second filter screen (36), the sewage outlet includes a first sewage outlet (31) and a second sewage outlet (32), and the water inlet includes a first water inlet (33) and a second water inlet (34); The first filter screen (35) and the second filter screen (36) are connected to the inner side of the water shield (3), a first sewage outlet (31) is constructed above the first filter screen (35) on the side of the water shield (3), a second sewage outlet (32) is constructed above the second filter screen (36) on the side of the water shield (3), a first water inlet (33) is constructed on the side of the water shield (3) facing the first sewage outlet (31), and a second water inlet (34) is constructed on the side of the water shield (3) facing the second sewage outlet (32); the water shield (3) is slidably arranged in the sewage chamber (2) so that the first water inlet (33) and the second water inlet (34) can be connected to the water flow oscillator (21) during the upward and downward sliding of the water shield (3), and the first sewage outlet (31) and the second sewage outlet (32) can be connected to the sewage collector (22).

2. A self-cleaning screen filter according to claim 1, characterized in that: The water inlet and the sewage outlet are arranged close to the top of the filter screen.

3. A self-cleaning screen filter according to claim 1 or 2, characterized in that: The sewage outlet is arranged in a strip shape.

4. A self-cleaning screen filter according to claim 1 or 2, characterized in that: The sewage collector (22) is configured as a block-shaped triangle, with the opposite side of one corner of the sewage collector being connected to and in conduction with the sewage chamber (2).

5. The self-cleaning screen filter according to claim 1, characterized in that: The water flow oscillator (21) is configured in a bottle-like shape, with a water inlet (211) connected to one end of the bottle mouth, a water outlet (212) connected to one end of the bottle bottom, and L-shaped side flow channels (213) symmetrically provided on both sides of the bottle mouth, with the other end of the side flow channel (213) connected to the middle and lower part of the bottle.

6. The self-cleaning screen filter according to claim 5, characterized in that: The corner of the side flow channel (213) is configured to be arc-shaped; and the bottom of the water flow oscillator (21) is configured to be arc-shaped.

7. The self-cleaning screen filter according to claim 1, characterized in that: The water inlet end (211) of the water flow oscillator (21) is connected to a manual valve, the water outlet end of the sewage collector (22) is connected to a manual valve, and manual valves are provided on the water inlet pipe (23) and the water outlet pipe (11).

8. The self-cleaning screen filter according to claim 7, characterized in that: The manual valve can be replaced by a solenoid valve, and the sewage chamber (2) is provided with a controller electrically connected to the electric motor (24) and each solenoid valve.

Images