Self-adaptive cleaning main and auxiliary filtering device

Abstract

The utility model discloses a self-adaptive cleaning main and auxiliary filtering device, belongs to the technical field of cleaning filtering devices, and solves the problem that the sewage recovery amount is reduced because the conventional filtering device can only filter once. The filter comprises a main filter and an auxiliary filter, wherein the main filter comprises a main filter cavity and a pollution discharge cavity which are communicated through a cleaning assembly; the auxiliary filter comprises an auxiliary filter cavity and a clear water cavity which are communicated with each other, the auxiliary filter cavity is further communicated with the blow-off pipe and the waste water pipe, and the clear water cavity is communicated with the main filter cavity through a backflow pipe. According to the utility model, the main filter and the auxiliary filter have two working modes of main filtering and auxiliary filtering, so that the main filter can clean silt and other dirt left on the surface of the filter screen cylinder while filtering, and the auxiliary filter can secondarily filter sewage generated by cleaning the main filter cavity; therefore, not only is the cleaning efficiency high, but also the cleaning water consumption is reduced, and the sewage recovery amount is increased.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning filter devices, and in particular to an adaptive cleaning main and auxiliary filter device. Background Art

[0002] The existing Chinese patent with announcement number CN117504394A discloses a hydraulic-electric hybrid driven self-cleaning filtering device and method, which includes a shell, the shell includes a filter chamber and a sewage chamber; a cleaning component is arranged in the filter chamber, one end of the cleaning component extends into the sewage chamber and is connected to the hydraulic drive component and the electric drive component; the hydraulic drive component is located inside the sewage chamber, and the hydraulic drive component and the electric drive component are used to hybrid drive the cleaning component.

[0003] Although the invention has low energy consumption, significant energy-saving effect and high degree of intelligence; it uses the hybrid drive of hydraulic drive components and electric drive components to drive the cleaning components to rotate, which greatly reduces energy consumption and has significant energy-saving effect, but the invention can only filter once and cannot filter twice, which reduces the amount of sewage recovery. Utility Model Content

[0004] In view of the above problems in the prior art, the present invention provides an adaptive cleaning primary and secondary filter device, which solves the problem that the existing filter device can only filter once, resulting in a reduced amount of sewage recovery.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] Provided is an adaptive cleaning main and auxiliary filter device, comprising a main filter and an auxiliary filter, the main filter comprising a main filter chamber and a sewage discharge chamber connected through a cleaning component; the auxiliary filter comprising an auxiliary filter chamber and a clean water chamber connected to each other, the auxiliary filter chamber is also connected to a sewage discharge pipe and a waste water pipe respectively, the sewage discharge pipe is connected to the sewage discharge chamber, and the clean water chamber is connected to the main filter chamber through a reflux pipe; a booster pump and a first electric valve are provided on the sewage discharge pipe, and a second electric valve and a third electric valve are provided on the reflux pipe and the waste water pipe.

[0007] In this solution, the auxiliary filter can perform secondary filtration on the sewage discharged from the sewage chamber, thereby increasing the amount of sewage recovery. Furthermore, through the configuration of the first electric valve, the second electric valve, the third electric valve and the booster pump, the working state of the main and auxiliary filter devices can be switched according to the specific filtered objects and the hydraulic pressure difference, thereby improving the cleaning efficiency of the waste.

[0008] Furthermore, the cleaning component is arranged inside the main filter cavity, one end of the cleaning component extends into the sewage cavity and is connected to the hydraulic drive component and the electric drive component; the hydraulic drive component is located inside the sewage cavity, and the hydraulic drive component and the electric drive component are used to hybrid drive the cleaning component. The hybrid drive of the hydraulic drive component and the electric drive component is used to drive the cleaning component to rotate, which greatly reduces energy consumption and has a significant energy-saving effect; the cleaning component can not only clean the main filter cavity, but also transfer the water in the main filter cavity to the sewage cavity through the hydraulic drive component, and the hydraulic drive component converts the kinetic energy of the water inside into torque to drive the cleaning component to rotate.

[0009] Furthermore, the cleaning component is connected to the hydraulic drive component located in the sewage discharge chamber, and the hydraulic drive component is rotationally connected to the electric drive component through an overrunning clutch; the electric drive component, the first electric valve, the second electric valve, the third electric valve and the booster pump are all electrically connected to the control component. The overrunning clutch can automatically disconnect or connect the power transmission of the electric drive component to prevent the closed electric drive component from hindering the rotation of the hydraulic drive component; and when the kinetic energy of the water is insufficient, the control component automatically controls the opening of the electric drive component and enhances the driving force of the hydraulic drive component through the overrunning clutch.

[0010] Furthermore, the main filter chamber includes a first filter chamber and a second filter chamber which are connected to each other, a hollow flange is arranged between the first filter chamber and the second filter chamber, and a solid flange is arranged between the second filter chamber and the sewage discharge chamber; a primary filter screen and a filter screen cylinder are arranged in the first filter chamber and the second filter chamber respectively; a water inlet and a water outlet are respectively arranged on the first filter chamber and the second filter chamber, and the primary filter screen is arranged at the water inlet. The mesh diameter of the primary filter screen is larger than the diameter of the filter screen cylinder, and the primary filter screen can prevent larger dirt from entering the first filter chamber.

[0011] Furthermore, the cleaning component includes a hollow sewage discharge shaft located in the filter screen cylinder. The hollow sewage discharge shaft is a cylindrical structure with a hollow interior and closed at both ends. The hollow sewage discharge shaft is connected to a plurality of branch pipe groups evenly distributed along its axis. Each branch pipe group includes at least two branch pipes arranged on the hollow sewage discharge shaft. The two branch pipes are respectively provided with a sewage suction nozzle for absorbing sewage and a cleaning brush for cleaning the filter screen cylinder; one end of the hollow sewage discharge shaft passes through a solid flange and is connected to the hydraulic drive component; the hydraulic drive component drives the hollow sewage discharge shaft to perform spiral reciprocating motion. The hollow sewage discharge shaft utilizes a reciprocating screw shaft in a reciprocating shaft sleeve to not only realize spiral reciprocating motion, but also the reciprocating screw shaft can realize reciprocating motion without changing the rotation direction compared to a conventional screw, thereby ensuring that the hydraulic drive component and the electric drive component only need to rotate in one direction without reversing, thereby improving the service life of the hydraulic drive component and the electric drive component.

[0012] Furthermore, the clean water chamber is connected to the second filter chamber through a return pipe, or the clean water chamber is connected to the first filter chamber and the second filter chamber through a return pipe and a branch pipe respectively. The setting of the return pipe allows the sewage filtered by the secondary filter chamber to flow back to the main filter chamber. The setting of the branch pipe facilitates the cleaning of the secondary filter. When the main filter chamber and the secondary filter are cleaned at the same time, clean water can be used, and the electric drive component drives the cleaning component to reverse, so that the clean water filtered by the primary filter can directly enter the secondary filter, and the dirt on the surface of the secondary filter chamber is discharged through the wastewater pipe.

[0013] Furthermore, the auxiliary filter cavity is a hollow tubular structure, and a cylindrical auxiliary filter screen is horizontally arranged inside the auxiliary filter cavity. The auxiliary filter screen is opened at one end close to the return pipe, and the other end of the auxiliary filter screen is convex outwardly and arranged in a dome shape. The dirt in the sewage will stay on the surface of the auxiliary filter screen, and the auxiliary filter screen is arranged in a dome shape, which facilitates the water flow to flow out from the inside of the auxiliary filter screen to take away the dirt on the surface of the auxiliary filter screen.

[0014] Furthermore, the water outlet end of the sewage pipe passes through the wall of the clean water chamber and is connected to the auxiliary filter chamber. The position of the sewage pipe is set in this way, which can increase the contact area between the sewage and the auxiliary filter screen and facilitate filtration; or the water outlet end of the sewage pipe is connected to the waste water pipe through the second electric valve. Although the sewage pipe connected to the second electric valve can only allow sewage to enter the clean water chamber from one end of the auxiliary filter screen, at the same time, the dirt only stays at the end of the auxiliary filter screen, thereby facilitating the subsequent water flow to clean the auxiliary filter screen.

[0015] Furthermore, the control component includes a controller, which is electrically connected to the pressure sensor, the differential pressure sensor assembly, the first electric valve, the second electric valve, the third electric valve, the electric drive assembly and the boost pump, respectively. The pressure sensor is connected to the water inlet pressure measuring tube, and the water inlet end of the water inlet pressure measuring tube is arranged in the water inlet; the differential pressure sensor assembly includes a first differential pressure sensor and a second differential pressure sensor, and the pressure measuring ports at both ends of the first differential pressure sensor are connected to the water inlet pressure measuring tube and the water outlet pressure measuring tube, respectively, and the water inlet end of the water outlet pressure measuring tube is located in the water outlet; the pressure measuring ports at both ends of the second differential pressure sensor are connected to one end of the first pressure measuring tube and the second pressure measuring tube, respectively, and the other ends of the first pressure measuring tube and the second pressure measuring tube are connected to both ends of the clean water chamber close to the waste water pipe and the reflux pipe, respectively.

[0016] The present invention discloses an adaptive cleaning main and auxiliary filter device, which has the following beneficial effects:

[0017] 1. The utility model has two working modes of main filtration and auxiliary filtration through the main filter and the auxiliary filter. The main filter can clean the sand and other dirt retained on the surface of the filter cylinder while filtering, and the auxiliary filter can perform secondary filtration on the sewage generated by the cleaning of the main filter chamber, thereby not only providing high cleaning efficiency, but also reducing the cleaning water consumption and increasing the amount of sewage recovery.

[0018] 2. The utility model can monitor the pressure difference between the water inlet pressure and the water outlet pressure and the pressure difference at both ends of the auxiliary filter through the setting of the pressure difference sensor component. The pressure difference value will reflect the blockage of the filter screen in the main filter chamber and the auxiliary filter chamber. Different valves are opened according to different pressure difference values ​​to perform different cleaning and filtering working modes.

[0019] 3. The utility model has the characteristics of high cleaning efficiency and low amount of discarded water: the sewage discharged from the main filter of the filtering device will be directly discharged into the clean water area of ​​the main filter chamber after secondary filtration by the auxiliary filter, and the auxiliary filter will not be cleaned and discharged until the mud and other dirt in the auxiliary filter accumulate to the pressure difference at both ends of the auxiliary filter exceeding the set value, with low amount of discarded water, saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the adaptive cleaning main and auxiliary filter devices;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 It is a connection diagram of the cleaning component, the hydraulic drive component and the electric drive component;

[0023] Figure 4 It is a structural schematic diagram of the reciprocating screw shaft;

[0024] Figure 5 is a schematic diagram of the structure of the electric drive component;

[0025] Figure 6 It is a structural schematic diagram of a hydraulic drive assembly;

[0026] Figure 7 It is a structural schematic diagram of the adaptive cleaning main and auxiliary filter devices;

[0027] Among them: 1. Main filter; 101. End cover; 102. Flange; 2. Main filter chamber; 210. First filter chamber; 211. Primary filter screen; 212. Water inlet; 220; Second filter chamber; 221. Filter screen cylinder; 222. Water outlet; 3. Sewage chamber; 4. Cleaning assembly; 410. Hollow sewage shaft; 411. Connecting pipe; 420. Branch pipe group; 421. Cleaning brush; 430. Reciprocating sleeve; 431. Sliding block; 440. Reciprocating screw shaft; 441. Connecting hole; 450. Sealed end cover; 460. Sealed sleeve; 5. Hydraulic drive assembly; 510. Hydraulic drive pipe; 6. Electric drive assembly; 610. Reducer; 620. Connecting telescopic Components; 621, square tube; 622, inner square tube; 623, sealing shaft sleeve; 630, support plate; 640, support rod; 650, overrunning clutch; 7, control component; 710, water inlet pressure measuring tube; 720, water outlet pressure measuring tube; 730, controller; 740, differential pressure sensor component; 750, second pressure measuring tube; 760, first pressure measuring tube; 8, auxiliary filter; 810, auxiliary filter chamber; 811, auxiliary filter screen; 820, clean water chamber; 821, first electric valve; 822, second electric valve; 823, third electric valve; 824, maintenance manual ball valve; 9, waste water pipe; 10, reflux pipe; 11, sewage pipe; 111, booster pump; 12, branch pipe. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0029] Example 1

[0030] On the one hand, reference Figure 1 and Figure 2 This embodiment provides an adaptive cleaning main and auxiliary filter device, including a main filter 1 and an auxiliary filter 8.

[0031] The main filter 1 includes a main filter chamber 2 and a sewage chamber 3 which are connected through a cleaning assembly 4. The main filter 1 can clean the sand and other dirt retained on the surface of the filter cylinder 221 while filtering.

[0032] The auxiliary filter 8 includes an auxiliary filter chamber 810 and a clean water chamber 820 which are interconnected. The auxiliary filter chamber 810 is also connected to the sewage pipe 11 and the wastewater pipe 9 respectively. The sewage pipe 11 is connected to the sewage chamber 3, and the clean water chamber 820 is connected to the main filter chamber 2 through the return pipe 10; the sewage pipe 11 is provided with a booster pump 111 and a first electric valve 821, and the return pipe 10 and the wastewater pipe 9 are provided with a second electric valve 822 and a third electric valve 823.

[0033] The auxiliary filter 8 can perform secondary filtration on the sewage discharged from the sewage chamber 3, thereby increasing the amount of sewage recovery. Furthermore, through the configuration of the first electric valve 821, the second electric valve 822, the third electric valve 823 and the booster pump 111, the working state of the main and auxiliary filter devices can be switched according to the specific filtered objects and the hydraulic pressure difference, thereby improving the cleaning efficiency of the sewage.

[0034] As a specific structure of the main filter 1 in this embodiment, the main filter 1 includes a shell, a cleaning component 4, a hydraulic drive component 5, an electric drive component 6 and a control component 7.

[0035] The shell is an internal hollow cylindrical structure with openings at both ends. One end opening is fixedly connected to the end cover 101 through a flange 102, and the other end opening of the shell protrudes outward to form a bottle mouth structure, which is used to provide a connection space for the cleaning component 4 and the electric drive component 6.

[0036] The housing comprises a main filter chamber 2 and a sewage discharge chamber 3. The main filter chamber 2 is used to filter sewage impurities, and the sewage discharge chamber 3 is used to discharge impurities.

[0037] The cleaning component 4 is disposed in the main filter chamber 2 and the sewage discharge chamber 3 and is used for cleaning impurities in the main filter chamber 2 . The cleaning component 4 connects the main filter chamber 2 and the sewage discharge chamber 3 .

[0038] The hydraulic drive assembly 5 is located in the sewage discharge chamber 3 and is connected to the cleaning assembly 4 . The hydraulic drive assembly 5 is used to drive the cleaning assembly 4 through the power of the sewage in the cleaning assembly 4 .

[0039] The electric drive assembly 6 is arranged outside the housing and is rotationally connected to the hydraulic drive assembly 5 via an overrunning clutch 650 , so as to enhance the driving force of the hydraulic drive assembly 5 .

[0040] The control component 7 is electrically connected to the electric drive component 6, and the control component 7 can automatically start the cleaning instruction; the overrunning clutch 650 is used to automatically disconnect the power transmission between the hydraulic drive component 5 and the closed electric drive component 6.

[0041] In this embodiment, the hybrid drive of the hydraulic drive component 5 and the electric drive component 6 is used to drive the cleaning component 4 to rotate, which greatly reduces energy consumption and has a significant energy-saving effect; and the overrunning clutch 650 can automatically disconnect the power transmission with the closed electric drive component 6 to avoid the closed electric drive component 6 hindering the rotation of the hydraulic drive component 5; and when the kinetic energy of the water is insufficient, the control component 7 automatically controls the opening of the electric drive component 6 and enhances the driving force of the hydraulic drive component through the overrunning clutch 650.

[0042] Specifically, refer to Figure 1 The main filter chamber 2 includes a first filter chamber 210 and a second filter chamber 220 which are connected to each other. A hollow flange is provided between the first filter chamber 210 and the second filter chamber 220, and a solid flange is provided between the second filter chamber 220 and the sewage discharge chamber 3. A primary filter screen 211 and a filter screen cylinder 221 are provided in the first filter chamber 210 and the second filter chamber 220, respectively. A water inlet 212 and a water outlet 222 are provided on the first filter chamber 210 and the second filter chamber 220, respectively, and the primary filter screen 211 is provided at the water inlet 212. The mesh diameter of the primary filter screen 211 is larger than the diameter of the filter screen cylinder 221, and the primary filter screen 211 can prevent larger dirt from entering the first filter chamber 210. A water inlet 212 connected to the primary filter screen 220 and a water outlet 222 connected to the filter screen cylinder 221 are provided on the first main filter chamber 2 and the second main filter chamber 2, respectively.

[0043] For details, refer to 3 and Figure 4 The cleaning assembly 4 includes a hollow sewage discharge shaft 410, a branch pipe group 420, a reciprocating shaft sleeve 430, a reciprocating screw shaft 440 and a slider 431.

[0044] The hollow sewage discharge shaft 410 is located in the filter screen cylinder 221. The hollow sewage discharge shaft 410 is a cylindrical structure with a hollow interior and closed at both ends. The hollow sewage discharge shaft 410 is connected to a plurality of branch pipe groups 420 evenly distributed along its axis.

[0045] Each branch pipe group 420 includes at least two branch pipes arranged on the hollow sewage discharge shaft 410 , and the two branch pipes are respectively provided with a sewage suction nozzle for absorbing sewage and a cleaning brush 421 for cleaning the filter screen cylinder 221 .

[0046] One end of the hollow sewage discharge shaft 410 passes through the solid flange and is connected to the hydraulic drive component 5; the hydraulic drive component 5 drives the hollow sewage discharge shaft 410 to perform spiral reciprocating motion.

[0047] The hollow sewage discharge shaft 410 not only plays the role of transmitting torque, but also connects the second filter chamber (220) with the hydraulic drive component 5 through multiple branch pipes, so that the hydraulic drive component 5 can use the power of water to drive the hollow sewage discharge shaft 410 to perform spiral reciprocating motion. The hollow sewage discharge shaft 410 drives the sewage suction nozzle and the cleaning brush 421 to perform spiral scanning and propulsion motion on the inner surface of the filter cylinder. The impurities adsorbed by the sewage suction nozzle enter the hollow sewage discharge shaft 410 through the branch pipe and flow into the sewage discharge chamber 3 through the hydraulic drive component 5, thereby realizing the function of sucking and washing the filter cylinder 221.

[0048] The other end of the hollow sewage discharge shaft 410 passes through the middle of the hollow flange and is threadedly connected to the reciprocating screw shaft 440 rotatably arranged in the reciprocating sleeve 430. The hollow sewage discharge shaft 410, the reciprocating sleeve 430 and the reciprocating screw shaft 440 are on the same axis.

[0049] refer to Figure 4 The reciprocating sleeve 430 is a structure with one end open and the interior hollow. The open end of the reciprocating sleeve 430 is fixed on the hollow flange and seals the hollow sewage discharge shaft 410. Preferably, a sealing sleeve 460 is provided at the connection between the reciprocating sleeve 430 and the hollow sewage discharge shaft 410. The sealing sleeve 460 ensures the sealing between the outer surface of the hollow sewage discharge shaft 410 and the inner surface of the reciprocating sleeve 430, and does not affect the reciprocating movement of the hollow sewage discharge shaft 410 in the reciprocating sleeve 430.

[0050] A slider 431 is provided inside the reciprocating sleeve 430 to cooperate with the screw groove on the reciprocating screw shaft 440. The slider 431 has the function of guiding the reciprocating screw shaft 440. A top screw for adjusting the tightness of the connection between the slider 431 and the reciprocating sleeve 430 is installed on the top.

[0051] The reciprocating screw shaft 440 is fixedly connected to the hollow sewage shaft 410 through the sealing end cover 450, and the sealing end cover 450 also serves to connect and seal the end opening of the hollow sewage shaft 410. Driven by the hydraulic drive assembly 5, the reciprocating screw shaft 440 rotates in the reciprocating sleeve 430 and reciprocates and translates along the central axis direction of the reciprocating sleeve 430 through the slider 431.

[0052] The hollow sewage discharge shaft 410 utilizes the reciprocating screw shaft 440 to realize not only spiral reciprocating motion in the reciprocating sleeve 430, but also the reciprocating screw shaft 440 can realize reciprocating motion without changing the rotation direction compared to the conventional screw, thereby ensuring that the hydraulic drive component and the electric drive component 6 only need to rotate in one direction without the need for reversing, thereby improving the service life of the hydraulic drive component and the electric drive component 6.

[0053] As a further solution of this embodiment, a connecting hole 441 is provided through the center of the end of the reciprocating screw shaft 440 along the axial direction, and the connecting hole 441 is connected to a connecting pipe 411 for balancing the pressure at both ends of the hollow sewage discharge shaft 410, and the connecting pipe 411 is arranged inside the hollow sewage discharge shaft 410. The arrangement of the connecting pipe 411 and the connecting hole 441 can balance the pressure at both ends of the hollow sewage discharge shaft 410, and avoid the reciprocating screw shaft 440 driving the hollow sewage discharge shaft 410 to reciprocate and change the inner cavity space of the closed reciprocating sleeve 430 to generate pressure increase or decrease, thereby hindering normal movement.

[0054] Specifically, refer to Figure 6 The hydraulic drive assembly 5 includes two hydraulic drive pipes 510 located in the sewage discharge chamber 3 and connected to the hollow sewage discharge shaft 410. The two hydraulic drive pipes 510 are L-shaped pipes and are centrally symmetrically arranged. One end of the two hydraulic drive pipes 510 is vertically connected to the hollow sewage discharge shaft 410, and a nozzle is arranged on the other end of the two drive pipes. When water is discharged, a reverse driving force is generated on the hydraulic drive pipe 510. The two centrally symmetrically arranged L-shaped pipes will use two reverse driving forces to form a force couple to drive the hollow sewage discharge shaft 410 to rotate, thereby realizing the conversion of the kinetic energy of water into driving energy.

[0055] Specifically, refer to Figure 5 The electric drive assembly 6 includes a reducer 610 fixedly arranged outside the housing and connected to the motor. The rotation direction of the output shaft of the reducer 610 is the same as the rotation direction of the hydraulic drive assembly 5, and the output shaft is unidirectionally rotatably connected to the connecting telescopic member 620 through an overrunning clutch 650. The connecting telescopic member 620 is telescopically arranged and used to transmit the unidirectional torque of the reducer 610 to the hollow sewage discharge shaft 410. When the speed of the reducer 610 is less than that of the hydraulic drive assembly 5, the overrunning clutch 650 will automatically disconnect the power transmission with the connecting telescopic member 620; thus, when the motor is turned off, the reducer 610 will not hinder the rotation of the hydraulic drive assembly 5; and the motor only needs to rotate in one direction and will not change the rotation direction, thereby improving the service life of the motor.

[0056] The connecting telescopic member 620 includes a square tube 621 , an inner square tube 622 and a sealing shaft sleeve 623 .

[0057] One end of the square tube 621 is inserted and slidably disposed in the inner square tube 622 , and the other end of the square tube 621 is connected to the overrunning clutch 650 .

[0058] One end of the inner square tube 622 is sleeved on the square tube 621, and one end of the inner square tube 622 passes through the sealing shaft sleeve 623 and is fixedly connected to the hollow sewage discharge shaft 410. A sealing end cover 450 is provided at the connection between the inner square tube 622 and the hollow sewage discharge shaft 410, and one end of the connecting tube 411 is close to the sealing end cover 450.

[0059] The sealing shaft sleeve 623 passes through the end of the shell and is sleeved on the hollow sewage discharge shaft 410 . A sealing shaft sleeve 460 is provided at the connection between the hollow sewage discharge shaft 410 and the sealing shaft sleeve 623 .

[0060] Preferably, but not limited to, the square tube 621 and the inner square tube 622 can be square or hexagonal, and the inner square tube 622 is sleeved on the square tube 621. The square tube 621 can not only drive the inner square tube 622 to rotate, but also the square tube 621 and the inner square tube 622 can slide relative to each other, thereby driving the hollow sewage discharge shaft 410 to rotate in one direction, and at the same time does not affect the reciprocating motion of the hollow sewage discharge shaft 410 under the action of the reciprocating screw shaft 440.

[0061] As a further solution of this embodiment, the end of the reducer 610 is fixed on the support plate 630, a step circle is provided on the sealing shaft sleeve 623, and multiple support rods 640 are fixed between the support plate 630 and the step circle of the sealing shaft sleeve 623. By setting the support rods 640 and the support plate 630, the reducer 610 can be fixed on the housing.

[0062] As a specific structure of the auxiliary filter 8 of this embodiment, the clean water chamber 820 is connected to the second filter chamber (220) through the return pipe 10. The setting of the return pipe 10 allows the sewage that has been filtered for the second time through the auxiliary filter chamber 810 to flow back to the main filter chamber 2.

[0063] The auxiliary filter chamber 810 is a hollow tubular structure, and a cylindrical auxiliary filter screen 811 is horizontally arranged inside the auxiliary filter chamber 810. The auxiliary filter screen 811 is opened at one end close to the return pipe 10, and the other end of the auxiliary filter screen 811 is convex outwardly and arranged in a dome shape. The dirt in the sewage will stay on the surface of the auxiliary filter screen 811. The auxiliary filter screen 811 is arranged in a dome shape, which facilitates the water flow to flow out from the inside of the auxiliary filter screen 811 to carry away the dirt on the surface of the auxiliary filter screen 811.

[0064] The water outlet end of the sewage pipe 11 passes through the wall of the clean water chamber 820 and is connected to the auxiliary filter chamber 810. Such arrangement of the sewage pipe 11 can increase the contact area between the sewage and the auxiliary filter screen 811, making filtering easier.

[0065] In this embodiment, both the return pipe 10 and the sewage pipe 11 are provided with a maintenance manual ball valve 824. When the auxiliary filter 8 is working normally, the maintenance manual ball valve 824 is in an open state. When the auxiliary filter 8 and the electric ball valve fail to maintain, the corresponding maintenance manual ball valve 824 is closed as needed.

[0066] The control component 7 includes a controller 730, which is electrically connected to the pressure sensor, the differential pressure sensor component 740, the first electric valve 821, the second electric valve 822, the third electric valve 823, the electric drive component 6 and the boost pump 111, respectively. The pressure sensor is connected to the water inlet pressure measuring tube 710, and the water inlet end of the water inlet pressure measuring tube 710 is arranged in the water inlet 212.

[0067] The differential pressure sensor assembly 740 includes a first differential pressure sensor and a second differential pressure sensor. The pressure measuring ports at both ends of the first differential pressure sensor are respectively connected to the water inlet pressure measuring tube 710 and the water outlet pressure measuring tube 720. The water inlet end of the water outlet pressure measuring tube 720 is located in the water outlet 222. The pressure measuring ports at both ends of the second differential pressure sensor are respectively connected to one end of the first pressure measuring tube 760 and the second pressure measuring tube 750. The other ends of the first pressure measuring tube 760 and the second pressure measuring tube 750 are respectively connected to the two ends of the clean water chamber 820 near the waste water pipe 9 and the return pipe 10.

[0068] On the other hand, the present embodiment provides a filtering method for adaptively cleaning a primary and secondary filtering device, comprising the following steps:

[0069] S1. Open the external water supply system to let the sewage flow into the water inlet 212, and the filtered sewage is discharged from the water outlet 222;

[0070] S2, using the pressure difference sensor assembly 740 to feed back the pressure difference ΔP1 between the water inlet 212 and the water outlet 222 and the pressure difference ΔP2 across the auxiliary filter 8 to the controller 730 in real time;

[0071] If ΔP1<0.3Mpa, it means that there is not much dirt accumulated on the main filter chamber 2 at this time, and there is no need to clean the main filter chamber 2. The controller 730 closes the first electric valve 821, the second electric valve 822 and the third electric valve 823, and the auxiliary filter 8 does not work.

[0072] If 0.3MPa≤ΔP1<3MPa, enter S3;

[0073] Otherwise, go to S4;

[0074] S3, opening the first electric valve 821 and the second electric valve 822, and starting the electric drive assembly 6 to drive the cleaning assembly 4 to rotate forward to clean the main filter chamber 2, and at the same time determining the value of ΔP2.

[0075] If ΔP2<2MPa, the cleaning wastewater in the main filter chamber 2 is filtered and recovered, and the controller 730 closes the third electric valve 823 to achieve zero wastewater discharge.

[0076] Otherwise, the auxiliary filter chamber 810 is flushed and cleaned, and the controller 730 opens the third electric valve 823;

[0077] S4. Open the second electric valve 822 and the third electric valve 823, close the first electric valve 821, start the electric drive component 6 to drive the cleaning component 4 to rotate in the opposite direction to clean the main filter chamber 2. The sewage in the main filter chamber 2 enters the sewage chamber 3 and is discharged through the wastewater pipe 9 on the auxiliary filter chamber 810.

[0078] At the same time, different cleaning time periods can be set according to the types of different dirt in the sewage. Coarse sand particles can be cleaned in a short time, and fine sand particles need to be cleaned continuously; algae and other organic dirt require the cleaning component 4 to rotate in the opposite direction and clean continuously.

[0079] Specifically, when 0.3MPa≤ΔP1<3MPa, and ΔP2<2MPa, after the set cleaning time, if ΔP2 is still less than 2MPa, it means that the dirt is mainly coarse mud and sand particles, and if ΔP2 is greater than or equal to 2MPa, it means that the dirt is mainly fine mud and sand particles.

[0080] When ΔP1≥3MPa, it indicates that the dirt retained on the filter surface is mainly fine-grained sand or organic dirt. At this time, the electric drive component 6 will be repeatedly turned on to drive the cleaning component 4 to rotate forward and reverse continuously for strong cleaning.

[0081] Example 2

[0082] refer to Figure 7 This embodiment is further limited on the basis of the embodiment 1. The specific improvement is to add a branch pipe 12 to clean the auxiliary filter 8. For other parts not mentioned, refer to the embodiment 1 or the prior art.

[0083] In this embodiment, the left and right ends of the clean water chamber 820 are respectively connected to one end of the branch pipe 12 and the waste water pipe 9, the middle parts of the branch pipe 12 and the waste water pipe 9 are respectively connected to one end of the return pipe 10 and the sewage pipe 11 through the first electric valve 821 and the second electric valve 822, the other ends of the branch pipe 12 and the sewage pipe 9 are respectively connected to the first filter chamber 210 and the waste water tank, and the other ends of the return pipe 10 and the sewage pipe 11 are respectively connected to the second filter chamber 220 and the sewage chamber 3.

[0084] In this embodiment, a maintenance manual ball valve 824 is provided on the branch pipe 12, the return pipe 10, and the waste water pipe 9. The provision of the manual valve facilitates the maintenance of the auxiliary filter 8. The first electric valve 821 and the second electric valve 822 are three-way two-position valves.

[0085] The provision of the branch pipe 12 facilitates the cleaning of the auxiliary filter 8. When the main filter chamber 2 and the auxiliary filter 8 need to be vigorously cleaned at the same time, for example, when the pressure difference between the water inlet 212 pressure and the water outlet 222 pressure and the pressure difference at both ends of the auxiliary filter 8 are both greater than 3MPa, clean water can be introduced for cleaning. At this time, the first electric valve 821 connects the branch pipe 12 and the auxiliary filter 8, and the second electric valve 822 connects the auxiliary filter 8 and the wastewater pipe 9. The electric drive component 6 drives the cleaning component 4 to reverse, so that the clean water filtered by the first-level filter net 211 can directly enter the auxiliary filter 8, and the dirt on the surface of the auxiliary filter chamber 810 is discharged through the wastewater pipe 9.

[0086] Although the specific implementation of the invention is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. An adaptive cleaning main and auxiliary filter device, comprising a main filter (1), wherein the main filter (1) comprises a main filter chamber (2) and a sewage chamber (3) connected via a cleaning assembly (4), characterized in that: The invention also comprises a secondary filter (8), wherein the secondary filter (8) comprises a secondary filter chamber (810) and a clean water chamber (820) which are interconnected, wherein the secondary filter chamber (810) is also respectively connected to a sewage discharge pipe (11) and a waste water pipe (9), wherein the sewage discharge pipe (11) is connected to the sewage discharge chamber (3), and the clean water chamber (820) is connected to the main filter chamber (2) via a return pipe (10); a booster pump (111) and a first electric valve (821) are provided on the sewage discharge pipe (11), and a second electric valve (822) and a third electric valve (823) are provided on the return pipe (10) and the waste water pipe (9).

2. The self-adaptive cleaning main and auxiliary filter device according to claim 1, characterized in that: The cleaning component (4) is arranged inside the main filter chamber (2), and one end of the cleaning component (4) extends into the sewage chamber (3) and is connected to the hydraulic drive component (5) and the electric drive component (6); the hydraulic drive component (5) is located inside the sewage chamber (3), and the hydraulic drive component (5) and the electric drive component (6) are used to hybrid drive the cleaning component (4).

3. The self-adaptive cleaning main and auxiliary filter device according to claim 2, characterized in that: The cleaning component (4) is connected to a hydraulic drive component (5) located in the sewage discharge chamber (3); the hydraulic drive component (5) is rotationally connected to the electric drive component (6) via an overrunning clutch (650); the electric drive component (6), the first electric valve (821), the second electric valve (822), the third electric valve (823) and the booster pump (111) are all electrically connected to the control component (7).

4. The self-adaptive cleaning main and auxiliary filter device according to claim 3, characterized in that: The main filter chamber (2) comprises a first filter chamber (210) and a second filter chamber (220) which are connected to each other, a hollow flange is provided between the first filter chamber (210) and the second filter chamber (220), and a solid flange is provided between the second filter chamber (220) and the sewage discharge chamber (3); A primary filter screen (211) and a filter screen cylinder (221) are respectively arranged in the first filter chamber (210) and the second filter chamber (220); a water inlet (212) and a water outlet (222) are respectively opened on the first filter chamber (210) and the second filter chamber (220), and the primary filter screen (211) is arranged at the water inlet (212).

5. The self-adaptive cleaning main and auxiliary filter device according to claim 4, characterized in that: The cleaning component (4) comprises a hollow sewage discharge shaft (410) located in the filter screen cylinder (221); the hollow sewage discharge shaft (410) is a cylindrical structure with a hollow interior and closed at both ends; the hollow sewage discharge shaft (410) is connected to a plurality of branch pipe groups (420) evenly distributed along its axis; each branch pipe group (420) comprises at least two branch pipes arranged on the hollow sewage discharge shaft (410); a sewage suction nozzle for absorbing sewage and a cleaning brush (421) for cleaning the filter screen cylinder (221) are respectively arranged on the two branch pipes; One end of the hollow sewage discharge shaft (410) passes through the solid flange and is connected to the hydraulic drive component (5); the hydraulic drive component (5) drives the hollow sewage discharge shaft (410) to perform spiral reciprocating motion.

6. The self-adaptive cleaning main and auxiliary filter device according to claim 4, characterized in that: The clean water chamber (820) is connected to the second filter chamber (220) via the return pipe (10), or the clean water chamber (820) is connected to the first filter chamber (210) and the second filter chamber (220) via the return pipe (10) and the branch pipe (12), respectively.

7. The self-adaptive cleaning primary and secondary filter device according to claim 4, characterized in that: The auxiliary filter chamber (810) is an internally hollow tubular structure, and a cylindrical auxiliary filter screen (811) is horizontally arranged inside the auxiliary filter chamber (810). The auxiliary filter screen (811) is opened at one end close to the return pipe (10), and the other end of the auxiliary filter screen (811) is protruding outward in a dome shape.

8. The self-adaptive cleaning main and auxiliary filter device according to claim 7, characterized in that: The water outlet end of the sewage discharge pipe (11) passes through the wall of the clean water chamber (820) and communicates with the auxiliary filter chamber (810); Alternatively, the water outlet end of the sewage pipe (11) is connected to the waste water pipe (9) via the second electric valve (822).

9. The self-adaptive cleaning main and auxiliary filter device according to claim 6, characterized in that: The control component (7) comprises a controller (730), and the controller (730) is electrically connected to the pressure sensor, the pressure difference sensor component (740), the first electric valve (821), the second electric valve (822), the third electric valve (823), the electric drive component (6), and the boost pump (111), respectively. The pressure sensor is in communication with a water inlet pressure measuring tube (710), and the water inlet end of the water inlet pressure measuring tube (710) is arranged in the water inlet (212); The differential pressure sensor assembly (740) comprises a first differential pressure sensor and a second differential pressure sensor, the pressure measuring ports at both ends of the first differential pressure sensor are respectively connected to a water inlet pressure measuring tube (710) and a water outlet pressure measuring tube (720), and the water inlet end of the water outlet pressure measuring tube (720) is located in the water outlet (222); The pressure measuring ports at both ends of the second differential pressure sensor are respectively connected to one end of the first pressure measuring tube (760) and the second pressure measuring tube (750), and the other ends of the first pressure measuring tube (760) and the second pressure measuring tube (750) are respectively connected to the two ends of the clean water chamber (820) close to the waste water pipe (9) and the return pipe (10).

Images