Integrated filter with automatic backwashing function

Abstract

The utility model discloses an integrated filter with an automatic backwashing function, which realizes integrated step-by-step filtration and remarkably improves the filtration precision and the impurity removal rate by connecting at least two groups of filtration and demagnetization areas in series and connecting with an inclined plate area and a water tank area, wherein the filtration and demagnetization areas comprise filter basket areas and magnetic bar areas; through the circulating bypasses which are connected in parallel as well as the blow-off pipeline and the backwashing pipeline which are connected into each filtering subarea, the non-stop cleaning of the filter can be realized, the production interruption is reduced, the production efficiency is improved, and meanwhile, the filter can be allowed to be subjected to backwashing cleaning when meeting the cleaning condition through the matching of a detection unit and a PLC (Programmable Logic Controller) in the control module, so that the cleaning efficiency is improved. Manual intervention is reduced, so that the working efficiency is improved, the service life of the filter is prolonged, and the maintenance cost is reduced; in addition, each filtering area is connected into a pressurized emptying pipeline, so that the pollution discharge speed is increased, the pollution discharge time is shortened, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to an integrated filter with an automatic backwashing function. Background Art

[0002] Filters are widely used in chemical, water treatment, coating, food and other industries. They are installed on fluid pipelines to filter pipeline fluid media. According to the precision requirements of the process, filter elements with different mesh sizes are often installed in the filter to achieve different filtering effects. Therefore, filters are suitable for the following industries: primary filtration, medium filtration, fine filtration and other links of materials in the chemical industry; physical isolation of sewage treatment in the water treatment industry, primary filtration and medium filtration of pure water, etc.; pre-treatment systems and liquid spray paint workshops in the coating industry; primary filtration and sanitary filtration of liquids in the food industry, etc.

[0003] However, after long-term operation, existing filters, such as the filter basket, filter screen, and inclined plate, are prone to clogging, which in turn affects filtration efficiency. Although traditional manual cleaning can be used, manual cleaning is inefficient and requires shutdown for cleaning, making continuous production impossible, thus affecting the production and use process. Especially in the production and use of pre-treatment for coating in the automotive manufacturing industry, large amounts of liquid are used, so high-flow filters are required to meet its filtration needs. In addition, colloids and various metal impurities are present in the liquid to be filtered after use. The colloids will adhere to the filter holes of the filter elements and accumulate over time, becoming increasingly difficult to remove. This makes the filter elements more susceptible to clogging and even affects the service life of the filter. In addition, as the adsorbed impurities accumulate on the magnetic filter elements, the filtration effect will gradually decrease during use.

[0004] After searching, the existing Chinese utility model document with announcement number CN220131975U discloses a permanent magnetic iron removal filter, "including a magnetization reaction tank, a flocculation sedimentation tank and a magnetic adsorption filter, the upper end of the left side of the magnetization reaction tank surface is connected with a water inlet pipe, the end of the water inlet pipe away from the magnetization reaction tank is connected with a first connecting pipe, the lower end of the right side of the magnetization reaction tank surface is connected with a second connecting pipe, the end of the second connecting pipe away from the magnetization reaction tank is connected with the flocculation sedimentation tank, the utility model is provided with a magnetization reaction tank, a flocculation sedimentation tank, a magnetic adsorption filter, a water inlet pipe, a first connecting pipe, a second connecting pipe and a third connecting pipe. "Although the filter has achieved a certain wastewater filtration effect, it has the following problems: First, the filter's filtration method is single, mainly relying on magnetization treatment and flocculation sedimentation, which may not be ideal for certain types of pollutants or under specific water quality conditions; second, the filter will temporarily interrupt the normal filtration process during backwashing, and frequent backwashing operations will affect the long-term stability and maintenance costs of the filter; third, the water used in the backwashing process depends on external water supply, which not only increases water resource consumption, but may also involve additional water treatment and supply costs. Therefore, the filter still has certain limitations in filtration efficiency, reliability of continuous operation, and operating cost control. Utility Model Content

[0005] In order to solve the problems existing in the prior art mentioned above, the purpose of the present invention is to provide an integrated filter with automatic backwashing function. The utility model achieves efficient filtration effect and automated operation through integrated filtration and backwashing design; the filter effectively intercepts impurities of different particle sizes by adopting a multi-stage filtration structure, and reduces production interruptions and manual intervention through the automatic backwashing function. Moreover, the precise control of the PLC controller not only improves the cleaning efficiency, but also extends the service life of the equipment and reduces maintenance costs.

[0006] In order to achieve the above-mentioned and other related purposes, the present invention adopts the following technical solutions:

[0007] The utility model provides an integrated filter with an automatic backwash function, wherein the inlet end and the outlet end of the filter are respectively provided with an inlet valve and an outlet valve, the interior of the filter is divided into a plurality of partitions, the partitions include at least two groups of filtering and demagnetizing zones, each filtering and demagnetizing zone is arranged successively, and the filtering and demagnetizing zone at the last position is sequentially connected with an inclined plate zone and a water tank zone, a partition partition is provided between the filtering and demagnetizing zones, the inclined plate zone and the water tank zone, and a partition channel for the filtrate to pass through is provided near the upper end position of the partition partition, each group of filtering and demagnetizing zones includes a filter basket zone and a magnetic rod zone arranged in front and behind, a filter basket partition is provided between the filter basket zone and the magnetic rod zone, an exhaust valve is provided at the top of the water tank zone, filter elements are all provided in the filter basket zone, the magnetic rod zone and the inclined plate zone, and the filter element includes a filter basket, a magnetic rod and an inclined plate, and a plurality of manholes for the filter elements to pass through are provided on the upper end surface of the filter, and the manholes are distributed in the filter basket zone, the magnetic rod zone and the inclined plate zone;

[0008] The filter is connected in parallel with a circulation bypass, the two ends of which are respectively connected to the inlet pipe and the outlet pipe of the filter, and a bypass valve is provided between the outlet of the circulation bypass and the outlet pipe of the filter; the circulation bypass is connected to a sewage discharge pipe, which is arranged under the filter, and a sewage discharge valve is provided between the sewage discharge pipe and each filtering area, and the sewage discharge pipe is connected to the exhaust valve through an exhaust pipe;

[0009] A backwash pump is installed on one side of the outlet end of the filter, the liquid inlet of the backwash pump is connected to the lower end of the water tank area, the liquid outlet of the backwash pump is connected to the backwash main pipe, and is connected to each filter area of ​​the filter through a backwash branch pipe. A backwash valve is provided between the backwash main pipe and each backwash branch pipe; a plurality of spray heads are provided at the end of the backwash branch pipe;

[0010] The filter also includes a control module, which includes a detection unit and a PLC controller. The detection unit is signal-connected to the PLC controller for transmitting data signals to the PLC controller; the PLC controller is signal-connected to the inlet valve, outlet valve, exhaust valve, bypass valve, each sewage valve, each backflushing valve, and backflushing pump for monitoring the blockage of the filter and transmitting control signals to control the opening and closing of each valve and the start and stop of the backflushing pump.

[0011] As an optimal technical solution, a plurality of filter baskets are provided in the filter basket area, each filter basket is positioned on the horizontal section of the filter basket partition, and the filter basket is used to filter and remove solid particles in the liquid to be filtered; a plurality of magnetic rods and magnetic rod sleeves are provided in the magnetic rod area, and the upper end of the magnetic rod sleeve is detachably fixed to the upper inner wall of the filter, and the magnetic rod is suspended and fixed in the magnetic rod sleeve by a cylinder, and the magnetic rod is used to adsorb magnetic particles in the liquid to be filtered and is controlled to rise and fall by the cylinder; a pair of inclined plates are provided in the inclined plate area through a slide rail, and the inclined plates are used to further filter and remove non-magnetic fine particles in the liquid to be filtered, and the slide rail is obliquely arranged toward the lower end of the inclined plate area of ​​the filter for positioning and installation of the inclined plates.

[0012] Furthermore, the sprinkler head located in the filter basket area is arranged inside each filter basket and faces the inner wall of the filter basket; the sprinkler head located in the magnetic rod area is arranged on the side wall of the magnetic rod area and faces the magnetic rod sleeve; the sprinkler head located in the inclined plate area is arranged at the midline position of the two inclined plates and faces the inclined plate surfaces on both sides.

[0013] As an optimal technical solution, the manholes located in the filter basket area and the inclined plate area are equipped with bolt quick-opening manhole covers, and the manhole located in the magnetic rod area is provided with a pneumatic lifting cover opening mechanism.

[0014] As a preferred technical solution, the number of the filtering and demagnetizing zones is two groups, the filter includes a first-level filtering and demagnetizing zone and a second-level filtering and demagnetizing zone, the first-level filtering and demagnetizing zone includes a first-level filter basket zone and a first-level magnetic rod zone, the second-level filtering and demagnetizing zone includes a second-level filter basket zone and a second-level magnetic rod zone, the number of magnetic rods arranged in the second-level magnetic rod zone is less than the number of magnetic rods arranged in the first-level magnetic rod zone, and the aperture of the filter basket in the second-level filter basket zone is larger than the aperture of the filter basket in the first-level filter basket zone.

[0015] As a preferred technical solution, the control module receives data signals from each detection unit through a PLC controller to monitor the blockage of the filter in real time. When the filter is blocked, the PLC controller automatically controls the opening and closing of the valve to switch the circulation path of the filtered liquid, and backwashes the filter element inside the filter by starting and stopping the backflush pump.

[0016] As an optimal technical solution, the detection unit includes a time detection unit, a flow detection unit, a pressure difference detection unit and a liquid level detection unit; the time detection unit includes a timer for detecting and recording the running time of the filter; the flow detection unit includes a magnetic flow sensor, which is applicable to different filter outlet pipe diameters and is more convenient to disassemble and assemble. The flow sensor is arranged on the filter outlet pipe to detect the real-time flow at the filter outlet; the pressure difference detection unit includes a differential pressure gauge, a pressure difference alarm and a pressure difference alarm counter. The differential pressure gauge is arranged below the filter basket partition of each filter basket area to detect the pressure difference between the inside and outside of the filter element in the filter area. The pressure difference alarm counter is used to detect the number of alarms of the pressure difference alarm in the same filter area per unit time; the liquid level detection unit includes a liquid level sensor, which is arranged in the water tank area and close to the bottom of the exhaust valve to detect the liquid level height and filling condition in the water tank area.

[0017] As a further preferred technical solution, the filter is further connected to a pressurized emptying pipeline, a pressure valve is provided on the pressurized emptying pipeline, and a pressure pump is provided at the inlet of the pressurized emptying pipeline.

[0018] As a further preferred technical solution, a pressure regulating valve is further provided on the liquid outlet pipeline of the backflush pump.

[0019] As described above, the present invention has the following beneficial effects:

[0020] (1) The utility model is an integrated filter with automatic backwashing function. Through the series connection of two groups of filtering and demagnetizing zones and the permanent magnetic filtration design of the double magnetic rod zone, a high-efficiency filtration effect with a filtration accuracy of up to 250um is achieved, and it can adsorb iron powder above 5u, and completely intercept the iron-containing impurities in the liquid passing through the magnetic rod zone. The magnetic strength can be selected from 5000GS to 12000GS, which effectively improves the filtration accuracy and impurity removal rate; and, through the design that each magnetic rod can be controlled by a cylinder and can be quickly and independently disassembled from the sleeve, it is convenient for cleaning and maintenance of the magnetic rod sleeve, reducing the maintenance difficulty and maintenance cost; in addition, the inclined plate zone adopts the inclined plate buffer turbulent loss and weight filtration method to remove zinc powder that cannot be adsorbed by the magnetic rod zone and other non-ferrous powders that are not filtered from the liquid to be filtered at the front end, thereby enhancing the filtration ability of fine particles.

[0021] (2) The utility model provides an integrated filter with an automatic backwashing function. Through external pipes and backwashing functions, when the filtration link meets the cleaning conditions, the filter can automatically clean the filtration area without stopping the machine, thereby improving the working efficiency of the filter and reducing the production interruption time. This continuous filtration and cleaning operation ensures high efficiency and stability of production; the liquid used by the backwash pump comes from the filtered liquid stored in the water tank area. This design can not only effectively save water resources and processing costs, but also reduce dependence on fresh water sources, which is beneficial to environmental protection and sustainable development; through the built-in automatic backwashing function, the filter achieves efficient self-cleaning ability, reduces the demand for external energy and resources, and also reduces operating costs, thereby improving overall economic benefits.

[0022] (3) The utility model provides an integrated filter with an automatic backwashing function. The automatic backwashing process is realized by the detection unit in conjunction with the PLC controller, which reduces manual intervention and improves production efficiency. At the same time, by accurately controlling the cleaning process, the service life of the filter is extended and the maintenance cost is reduced.

[0023] (4) The utility model is an integrated filter with automatic backwashing function. By connecting each filter area to a pressurized emptying pipeline, when the sewage valve of the corresponding filter area is opened and sewage is discharged, the sewage discharge speed can be accelerated by inward pressurized ventilation, thereby shortening the sewage discharge time and improving the overall cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the connection structure of pipelines and valves in the utility model.

[0025] Figure 2 It is a longitudinal sectional view of the overall structure of the filter in the present invention.

[0026] Figure 3 It is a cross-sectional view of the overall structure of the filter in the present utility model.

[0027] Figure 4 It is a rear view of the overall structure of the filter in the present invention.

[0028] Figure 5 It is a left view of the overall structure of the filter in the utility model.

[0029] Figure 6 It is a right view of the overall structure of the filter in the utility model.

[0030] Figure 7 yes Figure 2 Cross-sectional view of the lower end face of the filter at AA.

[0031] Figure 8 yes Figure 2Cross-sectional view of the magnetic bar area at the middle BB.

[0032] Figure 9 yes Figure 2 Cross-sectional view of the inclined plate area at CC.

[0033] Among them, the specific descriptions of the accompanying drawings are as follows: 11. Inlet valve; 12. Outlet valve; 13. Manhole; 2. Filter basket area; 21. Filter basket; 3. Magnetic rod area; 31. Magnetic rod; 32. Casing; 4. Inclined plate area; 41. Inclined plate; 5. Water tank area; 61. Circulation bypass; 611. Bypass valve; 612. Bypass filter basket; 62. Drain pipe; 621. Drain valve; 63. Exhaust pipe; 631. Exhaust valve; 64. Compressed air valve; 711. Backwash main pipe; 712. Backwash branch pipe; 72. Backwash pump; 73. Backwash valve; 74. Sprinkler head; 81. Flow sensor; 82. Differential pressure gauge; 83. Liquid level sensor. DETAILED DESCRIPTION

[0034] In order to better understand the purpose, structure and function of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" cited in this specification are based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 direction, and therefore cannot be understood as a limitation on the present invention.

[0036] Example

[0037] like Figures 1 to 9As shown, this embodiment provides an integrated filter with an automatic backwashing function, wherein the interior of the filter is divided into a plurality of partitions, wherein the partitions include at least two groups of filtering and demagnetizing zones, and each filtering and demagnetizing zone is successively arranged before and after the filtering and demagnetizing zone, and the filtering and demagnetizing zone at the last position is sequentially connected with an inclined plate zone 4 and a water tank zone 5, and a partition partition is provided between the filtering and demagnetizing zone, the inclined plate zone 4 and the water tank zone 5, and the partition partition is vertically fixed on the inner wall of the lower end of the filter, and a partition channel is opened near the upper end of the partition partition, and the partition channel is provided for the filtrate to pass through, and ensures the independence of each partition when it is emptied during the backwashing process, thereby enabling the separate backwashing of each partition, reducing the refilling time of the filter after the backwashing is completed, improving the working efficiency and increasing the service life. Each group of filtering and demagnetizing areas includes a filter basket area 2 and a magnetic rod area 3 arranged in front and behind. A filter basket partition is provided between the filter basket area 2 and the magnetic rod area 3. The filter basket partition is in a right-angle Z shape, and a filter basket 21 positioning hole is opened in the horizontal section of the filter basket partition; the filter basket area 2, magnetic rod area 3, inclined plate area 4 and water tank area 5 are distributed and connected in sequence from the inlet end to the outlet end of the filter, so that the liquid to be filtered enters from the inlet valve 11 and passes through the filter basket area 2, magnetic rod area 3, inclined plate area 4, water tank area 5 in sequence and is discharged from the outlet valve 12.

[0038] A filter element is provided in the filter, and the filter element includes a filter basket 21, a magnetic rod 31 and an inclined plate 41. The colloid in the filtrate generated during the pre-painting treatment process in the automobile manufacturing industry can adhere to the surface of the filter element through contact with the filter element, thereby achieving the removal of the colloid in the filtrate. The filter basket area 2 is provided with a plurality of filter baskets 21, each filter basket 21 is positioned on the horizontal section of the filter basket partition, and the filter basket 21 is used to filter and remove solid particles in the liquid to be filtered; the magnetic rod area 3 is provided with a plurality of magnetic rods 31 and magnetic rod sleeves 32, and the upper end of the magnetic rod sleeve 32 is detachably fixed to the upper inner wall of the filter, and the magnetic rod 31 is suspended and fixed in the magnetic rod sleeve 32 by a cylinder, and the magnetic rod 31 is used to adsorb magnetic particles in the liquid to be filtered and is controlled to rise and fall by the cylinder; the inclined plate area 4 is provided with a pair of inclined plates 41 through a slide rail, and the inclined plates 41 further filter and remove non-magnetic fine particles in the liquid to be filtered by buffering turbulent loss and weight loss filtration, thereby improving the filtration quality, and the slide rail is obliquely arranged toward the lower end of the inclined plate area 4 of the filter for positioning and installing the inclined plates 41. The water tank area 5 is used to store the filtered filtrate to ensure a stable supply of backwash water. An exhaust valve 631 is provided at the top of the water tank area 5, and the exhaust valve 631 is connected to an external exhaust pipeline 63.

[0039] The upper end surface of the filter is provided with a plurality of manholes 13 for the filter elements to pass through, and the manholes 13 are distributed in the filter basket area 2, the magnetic rod area 3 and the inclined plate area 4; in the present embodiment, the manholes 13 located in the filter basket area 2 and the inclined plate area 4 are provided with manhole covers, and the manhole covers are all of the bolt quick-opening type, so that each filter basket 21 and the inclined plate 41 are easy to load and unload, and the intensity of manual opening operation is reduced; in addition, the manhole 13 located in the magnetic rod area 3 is provided with a pneumatic lifting and opening mechanism, thereby avoiding manual opening of the cover and improving the efficiency of disassembly and assembly of the magnetic rod 31 and the magnetic rod sleeve 32.

[0040] In this embodiment, the number of the filtering and demagnetizing zones is two groups, and the filter includes a primary filtering and demagnetizing zone and a secondary filtering and demagnetizing zone. The primary filtering and demagnetizing zone includes a primary filter basket zone and a primary magnetic rod zone 3, and the secondary filtering and demagnetizing zone includes a secondary filter basket zone and a secondary magnetic rod zone. The number of magnetic rods 31 arranged in the secondary magnetic rod zone is less than the number of magnetic rods 31 arranged in the primary magnetic rod zone 3, and the aperture of the filter basket 21 in the secondary filter basket zone is larger than the aperture of the filter basket 21 in the primary filter basket zone, thereby achieving graded filtration while reducing costs, being able to remove larger particles and a larger amount of magnetic impurities in the primary filtering and demagnetizing zone, and further filtering the remaining smaller particles and a smaller amount of magnetic impurities in the secondary filtering and demagnetizing zone, and because the primary zone The primary filter basket area, the primary magnetic rod area 3, the secondary filter basket area, the secondary magnetic rod area, the inclined plate area 4 and the water tank area 5 are arranged in sequence from the inlet end to the outlet end of the filter. During operation, when the filter is in normal filtering operation, the filtrate from the pre-treatment system enters from the filter inlet valve 11 and passes through the primary filter basket area, the primary magnetic rod area 3, the secondary filter basket area, the secondary magnetic rod area, the inclined plate area 4 in sequence to complete multi-stage filtration and is stored in the water tank area 5. When the water tank area 5 is full, the excess filtrate is discharged from the filter outlet valve 12 and enters the pre-treatment system for reuse.

[0041] The inlet and outlet ends of the filter are respectively provided with an inlet valve 11 and an outlet valve 12. The filter is connected in parallel with a circulation bypass 61. The two ends of the circulation bypass 61 are respectively connected to the inlet and outlet pipelines of the filter. A bypass valve 611 is provided between the outlet of the circulation bypass 61 and the outlet pipeline of the filter. A bypass hand valve is provided between the inlet of the circulation bypass 61 and the inlet pipeline of the filter. During the backwash process, the opening state of the inlet valve 11 and the outlet valve 12 is switched to the bypass valve 611 and the bypass hand valve. In the open state, the circulation path of the filtrate is changed from the filter to the circulation bypass 61, ensuring the continuous operation of the filter during backwashing, thereby realizing the automatic backwashing function without stopping. The circulation bypass 61 is connected to the sewage pipe 62 through the bypass emptying manual valve. The sewage pipe 62 is arranged under the filter, and a sewage valve 621 is provided between the sewage pipe 62 and each filtering area. The sewage pipe 62 is connected to the exhaust valve 631 through the exhaust pipe 63, thereby avoiding the negative pressure effect during sewage discharge and ensuring the emptying rate.

[0042] A backwash pump 72 is installed on one side of the outlet end of the filter. The liquid inlet of the backwash pump 72 is connected to the lower end of the water tank area 5 through a water supply manual valve, so that the backwash pump 72 can directly use the liquid in the water tank area 5 for backwashing. The liquid outlet of the backwash pump 72 is connected to a backwash main pipe 711, and the backwash main pipe 711 is connected to each filter area of ​​the filter through a backwash branch pipe 712. A backwash valve 73 is provided between the backwash main pipe 711 and each backwash branch pipe 712; a plurality of spray heads 74 are provided at the end of the backwash branch pipe 712, which are located in the filter basket area. 2 filter basket spray heads 74 are arranged inside each filter basket 21, and the filter basket spray heads 74 are all facing the inner wall of the filter basket 21; the magnetic rod spray heads 74 located in the magnetic rod area 3 are arranged on the side wall of the magnetic rod area 3, and the magnetic rod spray heads 74 are all facing the magnetic rod sleeve 32; the inclined plate spray heads 74 located in the inclined plate area 4 are arranged at the midline position of the two inclined plates 41, and the inclined plate spray heads 74 are facing the plate surfaces of the inclined plates 41 on both sides; during operation, the backwash pump 72 provides backwashing power to each filter area through the backwash pipeline, and sprays and flushes each filter element through the spray heads 74.

[0043] The filter also includes a control module for monitoring the blockage status inside the filter and controlling the backwash operation. The control module includes a detection unit and a PLC controller. The detection unit is arranged on the filter and is connected to the PLC controller signal, thereby transmitting the detected filter data signal to the PLC controller; the PLC controller is connected to the inlet valve 11, the outlet valve 12, the exhaust valve 631, the bypass valve 611, each sewage valve 621, each backwash valve 73, and the backwash pump 72 signal, and judges the received filter data signal, and then transmits the control signal to control the opening and closing of each valve and the start and stop of the backwash pump 72; during operation, the control module receives the data signal from each detection unit through the PLC controller to monitor the blockage status of the filter in real time. When the filter is blocked, the PLC controller automatically controls the filter The circulation path of the filtrate is switched by opening and closing the valves at both ends of the inlet and outlet of the filter and the corresponding valves in different partitions of the filter, and the filter elements inside the filter are backwashed by starting and stopping the backwash pump 72 to achieve the purpose of non-stop backwashing; a bypass filter basket 612 is also installed in the inlet pipe of the circulation bypass 61 to ensure that the filtering effect can still be achieved when the circulation path of the filtrate is changed from the filter to the circulation bypass 61; the bypass manual valve and the water supply manual valve are kept in a normally open state, and the bypass emptying manual valve and the sewage valve 621 of the water tank area 5 are kept in a normally closed state; in other embodiments, in order to deal with the situation where automatic backwashing fails or the filter is not blocked after automatic backwashing, the control module also includes a manual control button, which is connected to the PLC controller signal for manually controlling the opening and closing of each valve and the start and stop of the backwash pump 72.

[0044] In this embodiment, the control module is powered by an external power supply, and the detection unit includes a time detection unit, a flow detection unit, a pressure difference detection unit and a liquid level detection unit; the time detection unit includes a timer for detecting and recording the running time of the filter; the flow detection unit includes a magnetic flow sensor 81, which can be applied to different filter outlet pipe diameters and is more convenient to disassemble and assemble. The flow sensor 81 is arranged on the filter outlet pipe to detect the real-time flow at the filter outlet; the pressure difference detection unit includes a differential pressure gauge 82, a pressure difference alarm and a pressure difference alarm counter. The differential pressure gauge 82 is arranged below the filter basket partition of each filter basket area 2 to detect the pressure difference inside and outside the filter element of the filter area. The pressure difference alarm counter is used to detect the pressure difference alarm in the same unit time. The number of alarms at the filter area; the liquid level detection unit includes a liquid level sensor 83, which is arranged in the water tank area 5 and close to the bottom of the exhaust valve 631, and is used to detect the liquid level height and filling condition in the water tank area 5; during operation, when any of the following situations occurs: the running time exceeds the set value, the flow rate is lower than the set threshold, the pressure difference is higher than the set threshold, and the number of alarms at the same filter area exceeds the set value, the PLC controller determines that the filter is blocked and performs the above-mentioned backwash operation; when the filter returns to normal filtering operation, the PLC controller controls the switch of the exhaust valve 631 according to the liquid level in the water tank area 5, thereby ensuring that the liquid in the filter is full while reducing the impact of the water hammer effect, protecting the internal structure of the filter, and extending the service life of the filter and the filter element.

[0045] In other embodiments, the filter is also connected to a pressurized emptying pipeline. When the inlet valve 11, the outlet valve 12, the exhaust valve 631, the bypass valve 611, the drain valves 621, and the backflush valves 73 all use pneumatically controlled butterfly valves, the pressurized emptying pipeline is connected to each valve, and a pressure valve 64 is provided on the pressurized emptying pipeline. A pressure pump is provided at the inlet of the pressurized emptying pipeline. The pressure valve 64 and the pressure pump are both connected to the PLC controller signal and controlled by the PLC controller. During operation, when the drain valve 621 is opened, the pressure valve 64 is controlled by the PLC controller to open and pressurize the filter through the pressure pump through the pressurized emptying pipeline, thereby accelerating the sewage emptying speed in the filter.

[0046] In another embodiment, a pressure regulating valve is further provided on the liquid outlet pipeline of the backwash pump 72. The pressure regulating valve is connected to the PLC controller signal and is controlled and regulated by the PLC controller. During operation, the PLC controller adjusts the liquid pressure and flow of the backwash pump 72 during backwashing by controlling the pressure regulating valve according to the filter area currently undergoing backwashing circulation, so as to meet the different backwashing cleaning requirements of the filter basket area 2, the magnetic rod area 3 and the inclined plate area 4, thereby effectively distributing the liquid in the water tank area 5 and saving resource costs, while providing sufficient cleaning force for different filter elements and extending their service life.

[0047] It should be emphasized here that the technology used by the PCL controller in the present invention does not involve technical improvements to computer programs and single-chip computer coding. Comparing the detected data with the set value to control the opening and closing of valves and pumps is a conventional technical means, so it will not be elaborated.

[0048] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It is understood by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. An integrated filter with automatic backwashing function, characterized in that: The inlet and outlet ends of the filter are respectively provided with an inlet valve (11) and an outlet valve (12). The interior of the filter is divided into a plurality of partitions, the partitions including at least two groups of filtration and demagnetization zones, each of which is arranged in sequence, and the last filtration and demagnetization zone is connected in sequence with an inclined plate zone (4) and a water tank zone (5). A partition partition is provided between the filtration and demagnetization zone, the inclined plate zone (4) and the water tank zone (5), and a partition channel for the filtrate to pass through is provided near the upper end of the partition partition. Each group of filtration and demagnetization zones includes a plurality of partitions arranged in sequence. A filter basket area (2) and a magnetic rod area (3), a filter basket partition is provided between the filter basket area (2) and the magnetic rod area (3), an exhaust valve (631) is provided at the top of the water tank area (5), filter elements are provided in the filter basket area (2), the magnetic rod area (3), and the inclined plate area (4), and the filter elements include a filter basket (21), a magnetic rod (31), and an inclined plate (41), and a plurality of manholes (13) for the filter elements to pass through are provided on the upper end surface of the filter, and the manholes (13) are distributed in the filter basket area (2), the magnetic rod area (3), and the inclined plate area (4); The filter is connected in parallel with a circulation bypass (61), the two ends of the circulation bypass (61) are respectively connected to the inlet pipe and the outlet pipe of the filter, and a bypass valve (611) is provided between the outlet of the circulation bypass (61) and the outlet pipe of the filter; the circulation bypass (61) is connected to a sewage discharge pipe (62), the sewage discharge pipe (62) is arranged under the filter, and a sewage discharge valve (621) is provided between the sewage discharge pipe (62) and each filtering area, and the sewage discharge pipe (62) is connected to the exhaust valve (631) through an exhaust pipe (63); A backwash pump (72) is installed on one side of the outlet end of the filter. The liquid inlet of the backwash pump (72) is connected to the lower end of the water tank area (5). The liquid outlet of the backwash pump (72) is connected to a backwash main pipe (711) and is connected to each filter area of ​​the filter through a backwash branch pipe (712). A backwash valve (73) is provided between the backwash main pipe (711) and each backwash branch pipe (712). A plurality of spray heads (74) are provided at the end of the backwash branch pipe (712). The filter further comprises a control module, the control module comprising a detection unit and a PLC controller, the detection unit being connected to the PLC controller by signal and being used to transmit data signals to the PLC controller; the PLC controller being connected to the inlet valve (11), the outlet valve (12), the exhaust valve (631), the bypass valve (611), each sewage valve (621), each backflushing valve (73), and the backflushing pump (72) by signal and being used to monitor the clogging condition of the filter and transmit control signals to control the opening and closing of each valve and the start and stop of the backflushing pump (72).

2. The integrated filter with automatic backwashing function according to claim 1, characterized in that: The filter basket area (2) is provided with a plurality of filter baskets (21), each filter basket (21) is positioned on a horizontal section of the filter basket partition, and the filter basket (21) is used to filter and remove solid particles in the liquid to be filtered; the magnetic rod area (3) is provided with a plurality of magnetic rods (31) and magnetic rod sleeves (32), the upper ends of the magnetic rod sleeves (32) are detachably fixed to the inner wall of the upper end of the filter, and the magnetic rods (31) are suspended and fixed in the magnetic rod sleeves (32) by a cylinder, and the magnetic rods (31) are used to absorb magnetic particles in the liquid to be filtered and are controlled to rise and fall by the cylinder; the inclined plate area (4) is provided with a pair of inclined plates (41) by a slide rail, and the inclined plates (41) are used to further filter and remove non-magnetic fine particles in the liquid to be filtered, and the slide rail is obliquely arranged toward the lower end of the inclined plate area (4) of the filter for positioning and installing the inclined plates (41).

3. The integrated filter with automatic backwashing function according to claim 2, characterized in that: The spray heads (74) located in the filter basket area (2) are arranged inside each filter basket (21) and face the inner side wall of the filter basket (21); the spray heads (74) located in the magnetic rod area (3) are arranged on the side wall of the magnetic rod area (3) and face the magnetic rod sleeve (32); and the spray heads (74) located in the inclined plate area (4) are arranged at the center line position of the two inclined plates (41) and face the plate surfaces of the inclined plates (41) on both sides.

4. The integrated filter with automatic backwashing function according to claim 1, characterized in that: The manholes (13) located in the filter basket area (2) and the inclined plate area (4) are equipped with bolt quick-opening manhole covers, and the manhole (13) located in the magnetic bar area (3) is provided with a pneumatic lifting cover opening mechanism.

5. The integrated filter with automatic backwashing function according to claim 1, characterized in that: The number of the filtering and demagnetizing zones is two groups, the filter comprises a primary filtering and demagnetizing zone and a secondary filtering and demagnetizing zone, the primary filtering and demagnetizing zone comprises a primary filter basket zone and a primary magnetic rod zone, the secondary filtering and demagnetizing zone comprises a secondary filter basket zone and a secondary magnetic rod zone, the number of magnetic rods (31) arranged in the secondary magnetic rod zone is less than the number of magnetic rods (31) arranged in the primary magnetic rod zone, and the aperture of the filter basket (21) in the secondary filter basket zone is greater than the aperture of the filter basket (21) in the primary filter basket zone.

6. The integrated filter with automatic backwashing function according to claim 1, characterized in that: The control module receives data signals from each detection unit through a PLC controller to monitor the clogging condition of the filter in real time. When the filter is clogged, the PLC controller automatically controls the opening and closing of the valve to switch the circulation path of the filtered liquid, and backwashes the filter element inside the filter by starting and stopping the backwash pump (72).

7. The integrated filter with automatic backwashing function according to claim 1, characterized in that: The detection unit comprises a time detection unit, a flow detection unit, a pressure difference detection unit and a liquid level detection unit; the time detection unit comprises a timer for detecting and recording the operating time of the filter; the flow detection unit comprises a magnetic flow sensor (81) which is applicable to different filter outlet pipe diameters and is more convenient to assemble and disassemble; the flow sensor (81) is arranged on the filter outlet pipe for detecting the real-time flow at the filter outlet; the pressure difference detection unit comprises a pressure differential gauge (82), a pressure differential alarm and a pressure differential alarm counter; the pressure differential gauge (82) is arranged below the filter basket partition of each filter basket area (2) for detecting the pressure difference between the inside and outside of the filter element in the filter area; the pressure differential alarm counter is used to detect the number of alarms of the pressure differential alarm at the same filter area within a unit time; the liquid level detection unit comprises a liquid level sensor (83); the liquid level sensor (83) is arranged in the water tank area (5) and close to the bottom of the exhaust valve (631) for detecting the liquid level height and filling condition in the water tank area (5).

8. An integrated filter with automatic backwashing function according to any one of claims 1 to 7, characterized in that: The filter is also connected to a pressurized emptying pipeline, a pressurized emptying valve (64) is provided on the pressurized emptying pipeline, and a pressure pump is provided at the inlet of the pressurized emptying pipeline.

9. An integrated filter with automatic backwashing function according to any one of claims 1 to 7, characterized in that: A pressure regulating valve is also provided on the liquid outlet pipeline of the backflush pump (72).

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