Backwashing multi-medium filtering device

Abstract

The invention relates to the technical field of sewage treatment, in particular to a backwashing multi-medium filtering device, which comprises a washing assembly, a tank body, a drain outlet, a water outlet and a water conveying pipe, the pushing assembly comprises a filtering layer, a servo motor, a washing column arranged in the filtering layer, a moving column arranged on the inner wall of the washing column and a spray washing column arranged on the inner wall of the washing column; a servo motor drives a lower connecting disc to rotate slowly, the connecting disc drives a water pipe to rotate below a filter layer, water flow is sprayed into the filter layer from the bottom of the filter layer through a water spraying opening in the surface of the water pipe, and filter materials at the bottom of the filter layer are washed in cooperation with backwashing water flow; the washing columns in the filter layers rotate together, the spray washing columns on the surfaces of the washing columns can be intermittently opened, vortexes are sprayed outwards, the filter materials on the layers are further washed, impurities are separated from the filter materials, finally, the impurities are discharged through reverse impact water flow at the bottom, and the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a backwashing multi-media filtering device. Background Art

[0002] With the rapid development of industrialization and urbanization, water pollution is becoming increasingly serious, and the requirements for water treatment technology are becoming higher and higher. Backwashing filter media is an indispensable part of the water treatment system and has been widely used in the pretreatment of industrial wastewater, domestic sewage and tap water. Its main function is to remove suspended matter, colloids, organic matter, heavy metals and other pollutants in the water through physical interception and adsorption. Its filtering effect directly affects the safety and stability of water quality. During the backwashing process of traditional multi-media filtration devices, as the operating time increases, the filter medium will gradually accumulate impurities, resulting in a decrease in filtering effect or even blockage. Although backwashing is a key step in restoring the activity and permeability of the filter medium, due to the uneven distribution of the backwashing water flow, it is easy to cause some filter media to be incompletely rinsed, thus affecting the filtering effect.

[0003] The Chinese patent with the authorization announcement number CN217549103U discloses a high-intensity backwashing multi-media filter, which is provided with an anthracite filter frame, a coarse sand filter frame and a fine sand filter frame which are elastically shaken by the cooperation of a pin shaft and a spring, and a flushing head connected to the backwashing pipe on the booster spray pump is provided below the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame, so that the backwashing water is extracted by the booster spray pump and output to the flushing head through the backwashing pipe, and the water is flushed to the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame with high intensity through the flushing head. At the bottom left end, a strong impact force is generated on the bottom left ends of the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame. Since the right ends of the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame are rotatably connected to the inner wall of the filter housing, the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame produce an up and down bouncing effect, which is used to bounce and shake off impurities blocked on the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame, further improving the filtering effect of impurities in sewage and cleaning large molecular impurities on the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame.

[0004] However, the technical solution still has the following defects: during cleaning, the patent shakes the filter frame and flushes the filter frame through a flushing head to clean the macromolecular impurities on the filter frame, but the device does not clean the filter material inside the filter layer during the sewage treatment process. The filter material and impurities inside the filter layer cannot be separated, and the impurities cannot be discharged to the outside of the filter, resulting in low sewage treatment efficiency. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a backwashing multi-media filter device, comprising a flushing assembly, including a tank body, a sewage outlet arranged at the upper end of the tank body, a water outlet and a water pipe arranged at the lower end of the tank body, a support column is arranged at the lower end of the tank body, and the water outlet is used to convey water into the tank body during backwashing; The pushing assembly comprises a filtering layer, a servo motor arranged at the upper end of the tank body, a flushing column arranged inside the filtering layer, a moving column arranged on the inner wall of the flushing column and a spray column arranged on the inner wall of the flushing column.

[0007] As a preferred solution of the backwashing multi-media filter device described in the present invention, wherein: the water supply pipe is provided with a solenoid valve at one end of the outer wall of the tank body, the water supply pipe is provided with a connector at one end of the inner wall of the tank body, the upper end of the connector is provided with a water pipe, and the upper end of the water pipe is provided with a water spray outlet in an array.

[0008] As a preferred solution of the backwashing multi-media filter device of the present invention, a connecting plate is provided at the upper end of the water pipe, a bump array is provided at the upper end of the connecting plate, a first inclined surface is provided at the upper end of the bump, and grooves are provided between adjacent bumps.

[0009] As a preferred solution of the backwashing multi-media filter device described in the present invention, a rotating shaft is arranged at the axis center of the servo motor, the end of the rotating shaft extends to the lower end of the filter layer and a movable ring is arranged on the outer wall of the rotating shaft, a connecting plate is arranged on the outer wall of the movable ring, and a concave block is connected to the outer end of the connecting plate.

[0010] As a preferred solution of the backwashing multi-media filter device described in the present invention, an eccentric ring is provided at the upper end of the movable ring, a circular ring is sleeved on the outer wall of the eccentric ring, a first connecting rod is provided on the outer wall of the circular ring, a first movable block is connected to the lower end of the first connecting rod, and the outer wall of the first movable block extends to the inner wall of the recessed block and slidably cooperates therewith.

[0011] As a preferred solution of the backwashing multi-media filter device described in the present invention, a second connecting rod is provided on the outer wall of the other side of the circular ring, a second movable block is provided on the upper end of the second connecting rod, a fixed ring is provided on the upper end of the circular ring, and a fixed rod is provided on the outer wall of the fixed ring.

[0012] As a preferred solution of the backwashing multi-media filter device of the present invention, a fixing disk is arranged on the inner wall of the flushing column, a groove is provided on the end surface of the fixing disk, and a guide groove is also provided on the end surface of the fixing disk.

[0013] As a preferred solution of the backwashing multi-media filter device described in the present invention, the lower end of the moving column is provided with a pushing plate, the lower end array of the pushing plate is provided with pushing teeth, the outer wall of the pushing teeth is provided with a second inclined surface, and the second inclined surface is in contact with the first inclined surface.

[0014] As a preferred solution of the backwashing multi-media filter device described in the present invention, the outer wall of the moving column is provided with a convex ring, the upper end of the convex ring is provided with a first elastic member, the upper end of the first elastic member is provided with a push ring, the push ring is sleeved on the outer wall of the moving column, the outer wall of the push ring is hinged with a hinged rod, the upper end of the hinged rod is hinged with a slider, the outer wall of the slider is provided with a first sliding surface, the upper end of the slider is provided with a limit block, the limit block extends to the outer wall of the guide groove and slidably cooperates with it.

[0015] As a preferred solution of the backwashing multi-media filter device described in the present invention, wherein: a limiting ring is fixed on the inner wall of the spray column, an opening is also opened on the inner wall of the spray column, a connecting rod is movably arranged inside the spray column, a moving block is arranged at the lower end of the connecting rod, a second sliding surface is arranged on the outer wall of the moving block, a conical block is arranged at the upper end of the connecting rod, a second elastic member is sleeved on the lower end of the conical block, the outer wall of the conical block fits the opening, and the outer wall of the opening is also connected to a vortex nozzle.

[0016] The beneficial effects of the present invention are as follows: when the connecting disk of the present invention rotates, it drives the water pipe below to rotate under the filter layer, and water is sprayed into the filter layer from the bottom of the filter layer through the water spray port on the surface of the water pipe, and the filter material at the bottom of the filter layer is washed with the backwash water flow to separate the filter material from the impurities intercepted from the sewage during filtration. At the same time, the flushing column inside the filter layer rotates together, and the spray column on the surface of the flushing column will be intermittently opened to spray out vortices to further clean the filter material of that layer, separate the impurities from the filter material, and penetrate into the filter material layer through the scouring force of the vortex flushing, thereby improving the removal rate of impurities, making the effluent water quality clearer and meeting higher emission standards, and finally discharging impurities through the back-impact water flow at the bottom, maintaining the high porosity and good filtering performance of the filter material, not only extending the service life of the filter material, but also avoiding the decrease in filtration efficiency due to clogging of the filter material, thereby ensuring the continuity and high efficiency of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a backwashing multi-media filter device of the present invention; Figure 2 It is a side sectional view of the tank body in the present invention; Figure 3 It is a schematic diagram of the top structure of the water delivery pipe in the present invention; Figure 4 It is a structural schematic diagram of the pushing component in the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement at point A; Figure 6 is a side sectional view of the pushing assembly in the present invention; Figure 7 It is a schematic diagram of the internal structure of the flushing column in the present invention; Figure 8 It is a cross-sectional view of the internal structure of the spray column in the present invention.

[0019] Reference numerals: 100, flushing assembly; 101, tank body; 1011, support column; 102, sewage outlet; 103, water outlet; 104, water pipe; 1041, solenoid valve; 1042, connector; 1043, water pipe; 1044, water spray port; 1045, connecting plate; 1046, protrusion; 1047, first inclined surface; 1048, groove; 200, push assembly; 201, filter layer; 202, servo motor; 2021, shaft; 2022, movable ring; 2023, connecting plate; 2024, concave block; 2025, eccentric ring; 2026, ring; 2027, first connecting rod; 2028, first movable block; 2029, second connecting rod; 20210, second movable block; 20211, fixed ring; 20212, fixed rod; 203, flushing column; 2031, fixed plate; 2032, slot; 2033, guide groove; 204, transport Moving column; 2041, pushing plate; 2042, pushing tooth; 2043, second inclined surface; 2044, convex ring; 2045, first elastic member; 2046, pushing ring; 2047, hinged rod; 2048, slider; 2049, first sliding surface; 20410, limiting block; 205, spray column; 2051, limiting ring; 2052, opening; 2053, connecting rod; 2054, moving block; 2055, second sliding surface; 2056, conical block; 2057, second elastic member; 2058, vortex nozzle. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Example 1 Reference Figure 1~Figure 5 , which is the first embodiment of the present invention, provides a backwashing multi-media filter device.

[0024] Specifically, the flushing assembly 100 includes a tank body 101, a sewage outlet 102 disposed at the upper end of the tank body 101, a water outlet 103 and a water pipe 104 disposed at the lower end of the tank body 101, a support column 1011 is disposed at the lower end of the tank body 101, and the water outlet 103 is used to deliver water to the inside of the tank body 101 during backwashing; The pushing assembly 200 includes a filter layer 201 , a servo motor 202 disposed at the upper end of the tank body 101 , a flushing column 203 disposed inside the filter layer 201 , a moving column 204 disposed on the inner wall of the flushing column 203 , and a spray column 205 disposed on the inner wall of the flushing column 203 .

[0025] Among them, the water outlet 103 is installed at the bottom of the tank body 101, and the sewage outlet 102 is installed at the top of the tank body 101. Under normal circumstances, the liquid enters the interior of the tank body 101 from the water inlet at the top of the tank body 101, and is finally discharged to the outside from the water outlet 103. When more impurities accumulate inside the filter layer 201 installed inside the tank body 101, affecting the subsequent filtering effect, the inside of the tank body 101 needs to be backwashed.

[0026] When backwashing begins, water is delivered to the inside of the tank body 101 from the water outlet 103 at the bottom. The water is infused from the bottom of the tank body 101 to the inside, and the infused water spreads from the bottom to the top, carrying the impurities inside the filter layer 201 and discharging them from the sewage outlet 102 to the outside, thereby completing the cleaning of the filter layer 201.

[0027] The water pipe 104 is fixed at the bottom of the tank body 101, and another stream of water is transported to the inside of the tank body 101 through the water pipe 104. The water flow rate inside the water pipe 104 is faster than the backwash water flow rate entering from the water outlet 103, and the filter layer 201 is flushed from the bottom of the filter layer 201 upward.

[0028] When the water pipe 104 injects water into the interior, the servo motor 202 located at the top of the tank body 101 runs, driving the flushing column 203 located inside the filter layer 201 to rotate. When the flushing column 203 rotates, the filter material inside the filter layer 201 is affected, and part of the filter material close to the flushing column 203 is loosened, which is conducive to the backwashing of the water flow. In addition, the spray column 205 located on the outer wall of the flushing column 203 will also spray a vortex into the filter layer 201 as the flushing column 203 rotates, further flushing the filter material inside the filter layer 201, separating the internal impurities from the filter material, and facilitating the backwashing water at the bottom to flush the impurities upwards and discharge the impurities from the sewage outlet 102.

[0029] In summary, during use, when backwashing is required, first close the water inlet valve and the water outlet valve to cut off the normal water flow, and then the backwash water is introduced into the interior of the tank body 101 from the water outlet 103. The backwash water flows upward from the bottom of the tank body 101, causing the filter material inside the filter layer 201 to expand and suspend upward, and the water pipe 104 at the bottom will also transport another stream of water to the inside. The water flow rate inside the water pipe 104 is faster than the water flow rate entering from the water outlet 103, and impacts the bottom of the filter layer 201 from the water pipe 104. The water flow enters from the bottom of the filter layer 201 and flows upward, further impacting the filter material in the bottom layer of the filter layer 201.

[0030] At the same time, the operation of the servo motor 202 located on the top of the tank body 101 will drive the flushing column 203 inside the filter layer 201 to rotate. The rotation of the flushing column 203 will loosen the filter material inside the filter layer 201, which is more conducive to the cleaning of the filter material by the bottom backwashing water. The rotation of the flushing column 203 will also drive the spray column 205 located on the outer wall of the flushing column 203 to intermittently spray out a vortex, further cleaning the filter material inside the filter layer 201, separating impurities from the filter material, so that the impurities are carried out of the filter layer 201 by the backwashing water and discharged from the sewage outlet 102.

[0031] Example 2 Reference Figure 1 to Figure 6 , which is the second embodiment of the present invention, and this embodiment is implemented based on the previous embodiment.

[0032] Specifically, a solenoid valve 1041 is provided at one end of the water pipe 104 located on the outer wall of the tank body 101, a connector 1042 is provided at one end of the water pipe 104 located on the inner wall of the tank body 101, a water pipe 1043 is provided at the upper end of the connector 1042, and a water spray port 1044 is arranged in an array at the upper end of the water pipe 1043.

[0033] Among them, the solenoid valve 1041 is located at the bottom end of the water pipe 104 outside the tank body 101, and the opening and closing of the water flow in the water pipe 104 is controlled by the solenoid valve 1041. The other end of the water pipe 104 extends to the inner wall of the tank body 101, and a connector 1042 is also connected above the part inside the tank body 101. The connector 1042 can rotate at the top end of the water pipe 104, and the connection is sealed.

[0034] A water pipe 1043 is fixed horizontally at the top of the connector 1042, and a plurality of water spray ports 1044 are provided on the upper surface of the water pipe 1043. The water flow inside the water pipe 104 enters the water pipe 1043 through the connector 1042, and then is sprayed to the outside through the water spray ports 1044 on the surface of the water pipe 1043.

[0035] Preferably, a connection plate 1045 is provided at the upper end of the water pipe 1043 , a bump 1046 is provided in an array at the upper end of the connection plate 1045 , a first inclined surface 1047 is provided at the upper end of the bump 1046 , and grooves 1048 are provided between adjacent bumps 1046 .

[0036] The connection plate 1045 is fixed at the center of the upper surface of the water pipe 1043 , and a plurality of protrusions 1046 are arrayed on the outer circle of the upper surface of the connection plate 1045 , a groove 1048 is formed between two adjacent protrusions 1046 , and each protrusion 1046 has a first inclined surface 1047 on its surface.

[0037] A rotating shaft 2021 is arranged at the axis of the servo motor 202 , the end of the rotating shaft 2021 extends to the lower end of the filter layer 201 and a movable ring 2022 is arranged on the outer wall of the rotating shaft 2021 , a connecting plate 2023 is arranged on the outer wall of the movable ring 2022 , and a concave block 2024 is connected to the outer end of the connecting plate 2023 .

[0038] Among them, the rotating shaft 2021 is driven by the servo motor 202 to rotate inside the tank body 101, and the bottom position of the rotating shaft 2021 passes through the filter layer 201 and extends to the top of the connecting disk 1045. The movable ring 2022 is sleeved on the outside of the rotating shaft 2021 and is not fixedly connected to the rotating shaft 2021. The rotation of the rotating shaft 2021 does not affect the movable ring 2022. At the same time, the movable ring 2022 is attached to the upper surface of the connecting disk 1045. The concave block 2024 on the outer wall of the movable ring 2022 is connected through the connecting plate 2023. The edge of the concave block 2024 is close to the inner circle of the connecting disk 1045 and the two do not contact.

[0039] An eccentric ring 2025 is provided at the upper end of the movable ring 2022, a circular ring 2026 is sleeved on the outer wall of the eccentric ring 2025, a first connecting rod 2027 is provided on the outer wall of the circular ring 2026, a first movable block 2028 is connected to the lower end of the first connecting rod 2027, and the outer wall of the first movable block 2028 extends to the inner wall of the recessed block 2024 and slidably cooperates therewith.

[0040] Among them, the eccentric ring 2025 is fixed on the outside of the rotating shaft 2021, and rotates with the rotation of the rotating shaft 2021. The center of the eccentric ring 2025 and the center of the rotating shaft 2021 are not at the same point. At the same time, a ring 2026 is provided on the outside of the eccentric ring 2025. The center of the ring 2026 and the center of the eccentric ring 2025 are at the same point. The movement of the eccentric ring 2025 will drive the ring 2026 to move outside the rotating shaft 2021.

[0041] A first connecting rod 2027 is fixed to the outside of the circular ring 2026. The first connecting rod 2027 is above the connecting plate 2023. A first movable block 2028 is hinged on the top of the first connecting rod 2027. The first movable block 2028 slides back and forth on the surface of the recessed block 2024 at the top of the connecting plate 2023. When the first movable block 2028 slides outward inside the recessed block 2024, it slides into the groove 1048 of the outer ring of the connecting disk 1045.

[0042] Preferably, a second connecting rod 2029 is provided on the outer wall of the other side of the circular ring 2026, a second movable block 20210 is provided on the upper end of the second connecting rod 2029, a fixing ring 20211 is provided on the upper end of the circular ring 2026, and a fixing rod 20212 is provided on the outer wall of the fixing ring 20211.

[0043] Among them, the second connecting rod 2029 is on the other side of the ring 2026, and is on the same straight line as the first connecting rod 2027. A second movable block 20210 is also hinged on the top of the second connecting rod 2029. The second movable block 20210 slides in the top position of the fixed rod 20212 on the side of the fixed ring 20211. Like the first movable block 2028, it will slide into the groove 1048 of the outer circle of the connecting plate 1045 when sliding forward.

[0044] The fixed ring 20211 is not affected by the rotation of the rotating shaft 2021. When the rotating shaft 2021 rotates, the eccentric ring 2025 rotates with the rotating shaft 2021. The circular ring 2026 outside the eccentric ring 2025 is affected by the eccentric ring 2025. With the second movable block 20210 as the fulcrum, the first connecting rod 2027 swings back and forth left and right. The second movable block 20210 moves back and forth in a straight line inside the fixed rod 20212. The first movable block 2028 on the other side slides back and forth in the recessed block 2024 at the end of the connecting plate 2023 with the movement of the circular ring 2026. At the same time, the connecting plate 2023 below swings back and forth with the circular ring 2026. When the first movable block 2028 slides out of the recessed block 2024, the second movable block 20210 slides backward inside the fixed rod 20212, and vice versa.

[0045] When the rotating shaft 2021 rotates one circle, the eccentric ring 2025 rotates one circle, and at the same time drives the circular ring 2026 to move. The first movable block 2028 at the end of the first connecting rod 2027 on the outer wall of the circular ring 2026 slides back and forth once in the recessed block 2024. After the first movable block 2028 slides back and forth once, it is pulled out from the groove 1048 of the outer ring of the connecting disk 1045 and enters the next groove 1048. That is, the rotating shaft 2021 rotates one circle, and through the engagement of the first movable block 2028 with the groove 1048, the connecting disk 1045 at the bottom is driven to rotate an angle of a groove 1048.

[0046] In summary, when in use, back-impact water is injected into the interior from the water outlet 103, and spreads from the bottom to the top of the tank body 101. At the same time, the solenoid valve 1041 is opened, and a part of the back-impact water is injected into the tank body 101 from the inside of the water pipe 104. The water flow rate inside the water pipe 104 is faster, and it impacts the filter layer 201 through the water spray port 1044 on the surface of the water pipe 1043 at the top of the connector 1042, and enters the inside of the filter layer 201 through the through hole at the bottom of the filter layer 201 to clean the filter material at the bottom of the filter layer 201. The filter layer 201 inside the multi-media filter device is divided into multiple layers. Relatively speaking, the filter material filled in the lower filter layer is denser than that in the upper layer, and is used to filter finer suspended matter and impurities. Therefore, when backwashing, it is necessary to impact the filter material layer located at the bottom of the filter layer 201 with a larger water flow, which is more conducive to the separation of filter material particles and impurities inside the bottom filter material layer, and the impurities are driven upward by the backwashing water.

[0047] The external servo motor 202 drives the rotating shaft 2021 to rotate. When the rotating shaft 2021 rotates, it drives the eccentric ring 2025 fixed on the outside of the rotating shaft 2021 to rotate. The circular ring 2026 outside the eccentric ring 2025 drives the first movable block 2028 and the second movable block 20210 on both sides to move as the eccentric ring 2025 rotates. The first movable block 2028 slides inside the concave block 2024 at the end of the connecting plate 2023, and the second movable block 20210 slides at the bottom of the fixed rod 20212. The rotating shaft 2021 rotates one circle, and the eccentric ring 2025 drives the first movable block 2028 and the second movable block 20210 on both sides of the circular ring 2026 to move in the groove 1048 of the outer ring of the lower connecting disk 1045, from the current groove 1048 to the next groove 1048. The rotating shaft 2021 rotates one circle, driving the lower connecting disk 1045 to rotate by one angle of the groove 1048.

[0048] The connecting plate 1045 is fixed above the water pipe 1043. The connecting plate 1045 is affected by the rotating shaft 2021. When the rotating shaft 2021 rotates one circle, the connecting plate 1045 will drive the water pipe 1043 below to rotate by one angle of the groove 1048. The water pipe 1043 rotates slowly at the top of the water pipe 104. The multiple water nozzles 1044 arranged on the upper end surface of the water pipe 1043 rotate slowly below the filter layer 201 as the water pipe 1043 rotates. Through the rotation of the water pipe 1043, the water nozzles 1044 will make a complete circle at the bottom of the filter layer 201 to impact the inside of the filter layer 201, clean the filter layer at the bottom, and facilitate the separation of impurities and filter materials inside the bottom filter layer. As the back-impact water discharged from the water outlet 103 flows upward, it is discharged to the outside through the sewage outlet 102.

[0049] Example 3 Reference Figure 6~Figure 8 , which is the third embodiment of the present invention, and this embodiment is implemented based on the previous embodiment.

[0050] Specifically, a fixing plate 2031 is disposed on the inner wall of the flushing column 203 , a groove 2032 is formed on the end surface of the fixing plate 2031 , and a guide groove 2033 is also formed on the end surface of the fixing plate 2031 .

[0051] Among them, the flushing column 203 is fixed on the outside of the rotating shaft 2021 and is located in the middle position of the filter layer 201. The flushing column 203 will rotate with the rotating shaft 2021. The bottom of the flushing column 203 is an opening and the upper end is closed. The back-impact water in the water outlet 103 will enter the inside of the flushing column 203 from the bottom of the flushing column 203. A plurality of fixed plates 2031 are arranged on the inner wall of the flushing column 203, and a plurality of grooves 2032 are opened on the surface of the fixed plate 2031 for the back-impact water at the bottom to enter the inside of the flushing column 203.

[0052] Preferably, a pushing disk 2041 is provided at the lower end of the moving column 204 , a pushing tooth 2042 is provided in an array at the lower end of the pushing disk 2041 , a second inclined surface 2043 is provided on the outer wall of the pushing tooth 2042 , and the second inclined surface 2043 is in contact with the first inclined surface 1047 .

[0053] Among them, the moving column 204 is sleeved on the outside of the rotating shaft 2021, and a convex rod is fixed on the surface of the lower pushing disk 2041. The convex rod is movably connected to a small hole opened at the bottom of the filter layer 201. Under the influence of the convex rod, the moving column 204 will not rotate with the rotation of the rotating shaft 2021.

[0054] The outer ring array on the lower surface of the pushing disk 2041 has a plurality of pushing teeth 2042, which are engaged in the groove 1048 on the upper surface of the connecting disk 1045, and the second inclined surface 2043 on the surface of the pushing tooth 2042 is in contact with the first inclined surface 1047 on the surface of the protrusion 1046. When the connecting disk 1045 is rotated by the rotating shaft 2021, the first inclined surface 1047 is in contact with the second inclined surface 2043, pushing the pushing tooth 2042 upward. At this time, the pushing disk 2041 moves upward on the connecting disk 1045.

[0055] A convex ring 2044 is provided on the outer wall of the moving column 204, a first elastic member 2045 is provided on the upper end of the convex ring 2044, a pushing ring 2046 is provided on the upper end of the first elastic member 2045, the pushing ring 2046 is sleeved on the outer wall of the moving column 204, a hinge rod 2047 is hinged on the outer wall of the pushing ring 2046, a slider 2048 is hinged on the upper end of the hinge rod 2047, a first sliding surface 2049 is provided on the outer wall of the slider 2048, a limiting block 20410 is provided on the upper end of the slider 2048, the limiting block 20410 extends to the outer wall of the guide groove 2033 and slidably cooperates therewith.

[0056] Among them, the convex ring 2044 is fixed on the surface of the moving column 204. When the pushing plate 2041 below moves upward, the convex ring 2044 moves upward with the moving column 204. The first elastic member 2045 is located between the pushing ring 2046 and the convex ring 2044. When the convex ring 2044 moves upward, the pushing ring 2046 is pushed upward by the first elastic member 2045.

[0057] A plurality of hinged rods 2047 are hinged on the surface of the pushing ring 2046, a slider 2048 is hinged on the top end of the hinged rod 2047, a limit block 20410 arranged on the upper end surface of the slider 2048 passes through a guide groove 2033 opened on the surface of the fixed disk 2031, and slides on the upper surface of the fixed disk 2031. When the pushing ring 2046 is upward, the slider 2048 slides outward on the lower surface of the fixed disk 2031.

[0058] Preferably, a limit ring 2051 is fixed on the inner wall of the spray column 205, an opening 2052 is also opened on the inner wall of the spray column 205, a connecting rod 2053 is movably arranged inside the spray column 205, a moving block 2054 is arranged at the lower end of the connecting rod 2053, a second sliding surface 2055 is arranged on the outer wall of the moving block 2054, a conical block 2056 is arranged at the upper end of the connecting rod 2053, a second elastic member 2057 is sleeved on the lower end of the conical block 2056, the outer wall of the conical block 2056 fits the opening 2052, and the outer wall of the opening 2052 is also connected to a vortex nozzle 2058.

[0059] Among them, the spray column 205 is fixed on the inner wall of the flushing column 203, and the bottom is connected to the inner wall of the flushing column 203, the conical block 2056 at the top of the connecting rod 2053 is located in the middle of the limiting ring 2051 and the opening 2052, and the second elastic member 2057 is located in the middle of the conical block 2056 and the limiting ring 2051. The conical block 2056 is pushed toward the opening 2052 by the second elastic member 2057, so that the conical block 2056 is close to the opening 2052 to seal the spray column 205.

[0060] The second sliding surface 2055 of the moving block 2054 at the lower end of the connecting rod 2053 is fitted with the first sliding surface 2049 on the surface of the slider 2048. When the slider 2048 is pushed to slide toward the outside of the fixed disk 2031, the moving block 2054 is driven by the first sliding surface 2049 on the surface of the slider 2048 to move toward the rear side of the spray column 205. At this time, the conical block 2056 is separated from the opening 2052, and the backwash water inside the flushing column 203 is sprayed outward through the gap at the opening 2052, and is sprayed outward in a vortex shape through the vortex nozzle 2058 at the top of the spray column 205, so as to clean the filter material in the filter layer 201 outside the spray column 205, and further separate the filter material and impurities inside the filter layer 201.

[0061] In summary, when in use, the rotation of the rotating shaft 2021 drives the flushing column 203 to rotate in the middle of the filter layer 201. At this time, the multiple spray columns 205 located on the outer wall of the flushing column 203 rotate together with the flushing column 203. When the flushing column 203 drives the spray columns 205 on the surface to rotate together, it will collide with the filter material close to the outer wall of the flushing column 203, so that it is loose inside the filter layer 201, which is beneficial to the back-impact water flow to clean this part of the filter material, and while the rotating shaft 2021 drives the flushing column 203 to rotate in the middle of the filter layer 201, the connecting plate 1045 at the bottom rotates with the rotation of the rotating shaft 2021. At this time, the pushing plate 2041 located above the connecting plate 1045 is affected by the connecting plate 1045. Every time the connecting plate 1045 rotates an angle of the groove 1048, the pushing plate 2041 will be pushed upward.

[0062] When the push plate 2041 is pushed upward, the moving column 204 will drive the convex ring 2044 on the surface to push upward. When the convex ring 2044 moves upward, it will push the push ring 2046 upward. When the push ring 2046 moves upward, it will push the slider 2048 to slide outward under the fixed plate 2031. When the slider 2048 slides, the moving block 2054 fitted therewith will be driven backward, and the conical block 2056 at the end will move backward to squeeze the second elastic member 2057. At the same time, a gap will appear between the opening 2052 inside the spray column 205. At this time, the backwash water inside the flushing column 203 is sprayed out from the outside of the spray column 205 in the gap, and is sprayed outward in a vortex shape through the vortex nozzle 2058 on the top.

[0063] The conical block 2056 and the opening 2052 are intermittently opened, and the internal back-impact water is intermittently sprayed to the outside. The spray column 205 rotates inside the filter layer 201 along with the flushing column 203. At the same time, the spray column 205 will intermittently spray vortex-shaped water flow to the outside, which can impact the filter material inside the filter layer 201 over a larger area. Together with the back-impact water injected into the water outlet 103, the filter material inside the filter layer 201 is cleaned, and impurities and filter material are separated and discharged.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A backwashing multi-media filter device, characterized in that: include: A flushing assembly (100) comprises a tank body (101), a sewage outlet (102) arranged at the upper end of the tank body (101), a water outlet (103) and a water pipe (104) arranged at the lower end of the tank body (101), wherein a support column (1011) is arranged at the lower end of the tank body (101), and the water outlet (103) is used to supply water to the interior of the tank body (101) during backwashing; A pushing assembly (200) comprising a filtering layer (201), a servo motor (202) disposed at the upper end of the tank body (101), a flushing column (203) disposed inside the filtering layer (201), a moving column (204) disposed on the inner wall of the flushing column (203), and a spray column (205) disposed on the inner wall of the flushing column (203); The water delivery pipe (104) is provided with a solenoid valve (1041) at one end located on the outer wall of the tank body (101), and a connector (1042) is provided at one end of the water delivery pipe (104) located on the inner wall of the tank body (101). A water pipe (1043) is provided at the upper end of the connector (1042), and a water spraying port (1044) is provided in an array at the upper end of the water pipe (1043); The upper end of the water pipe (1043) is provided with a connection disk (1045), the upper end of the connection disk (1045) is provided with a protrusion (1046) in array, the upper end of the protrusion (1046) is provided with a first inclined surface (1047), and grooves (1048) are provided between adjacent protrusions (1046).

2. The backwashing multi-media filter device according to claim 1, characterized in that: A rotating shaft (2021) is arranged at the axis of the servo motor (202), the end of the rotating shaft (2021) extends to the lower end of the filter layer (201), and a movable ring (2022) is arranged on the outer wall of the rotating shaft (2021), a connecting plate (2023) is arranged on the outer wall of the movable ring (2022), and a concave block (2024) is connected to the outer end of the connecting plate (2023).

3. The backwashing multi-media filter device according to claim 2, characterized in that: An eccentric ring (2025) is provided at the upper end of the movable ring (2022); a circular ring (2026) is sleeved on the outer wall of the eccentric ring (2025); a first connecting rod (2027) is provided on the outer wall of the circular ring (2026); a first movable block (2028) is connected to the lower end of the first connecting rod (2027); and the outer wall of the first movable block (2028) extends to the inner wall of the concave block (2024) and slidably cooperates therewith.

4. The backwashing multi-media filter device according to claim 3, characterized in that: The outer wall of the circular ring (2026) is also provided with a second connecting rod (2029), the upper end of the second connecting rod (2029) is provided with a second movable block (20210), the upper end of the circular ring (2026) is provided with a fixing ring (20211), and the outer wall of the fixing ring (20211) is provided with a fixing rod (20212).

5. The backwashing multi-media filter device according to claim 4, characterized in that: The inner wall of the flushing column (203) is provided with a fixing disk (2031), the end surface of the fixing disk (2031) is provided with a slot (2032), and the end surface of the fixing disk (2031) is also provided with a guide slot (2033).

6. The backwashing multi-media filter device according to claim 5, characterized in that: The lower end of the motion column (204) is provided with a pushing disk (2041), the lower end of the pushing disk (2041) is provided with a pushing tooth (2042) in array, the outer wall of the pushing tooth (2042) is provided with a second inclined surface (2043), and the second inclined surface (2043) is in contact with the first inclined surface (1047).

7. The backwashing multi-media filter device according to claim 6, characterized in that: The outer wall of the motion column (204) is provided with a convex ring (2044), the upper end of the convex ring (2044) is provided with a first elastic member (2045), the upper end of the first elastic member (2045) is provided with a push ring (2046), the push ring (2046) is sleeved on the outer wall of the motion column (204), the outer wall of the push ring (2046) is hinged with a hinge rod (2047), the upper end of the hinge rod (2047) is hinged with a slider (2048), the outer wall of the slider (2048) is provided with a first sliding surface (2049), the upper end of the slider (2048) is provided with a limit block (20410), the limit block (20410) extends to the outer wall of the guide groove (2033) and slidably cooperates therewith.

8. The backwashing multi-media filter device according to claim 7, characterized in that: A limit ring (2051) is fixed on the inner wall of the spray column (205), and an opening (2052) is also provided on the inner wall of the spray column (205). A connecting rod (2053) is movably provided inside the spray column (2055), a moving block (2054) is provided at the lower end of the connecting rod (2053), and a second sliding surface (2055) is provided on the outer wall of the moving block (2054). A conical block (2056) is provided at the upper end of the connecting rod (2053), and a second elastic member (2057) is sleeved on the lower end of the conical block (2056), the outer wall of the conical block (2056) fits the opening (2052), and the outer wall of the opening (2052) is connected to a vortex nozzle (2058).

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