Backwashing multi-media filter device

Abstract

The present invention relates to the technical field of sewage treatment, in particular to a backwashing multi-media filter device, comprising a flushing component, including a tank body, a sewage outlet, a water outlet and a water pipe; a driving component, including a filter layer, a servo motor, a flushing column arranged inside the filter 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; the present invention drives the lower connecting disk to rotate slowly by the servo motor, and the connecting disk drives the water pipe to rotate below the filter layer, and sprays water from the bottom of the filter layer into the filter layer through the water spray port on the surface of the water pipe, and cooperates with the backwashing water flow to flush the filter material at the bottom of the filter layer, while the servo motor rotates, the flushing column inside the filter layer rotates together, and the spray column on the surface of the flushing column will intermittently open, spraying out vortexes to further flush the filter material of that layer, separating impurities from the filter material, and finally discharging the impurities through the back-impact water flow at the bottom, thereby improving the efficiency of sewage treatment.

Description

Technical Field

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

[0002] With the rapid development of industrialization and urbanization, water resource pollution is becoming increasingly serious, and the requirements for water quality treatment technology are becoming higher and higher. Backwash 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 filtration effect directly affects the safety and stability of water quality. During the backwash process of traditional multi-media filtration devices, as the operating time increases, the filter media will gradually accumulate impurities, resulting in a decrease in filtration effect and even blockage. Although backwashing is a key step to restore the activity and permeability of the filter media, the uneven distribution of the backwash water flow can easily lead to incomplete flushing of some filter media, thus affecting the filtration effect.

[0003] The Chinese patent with the authorization announcement number CN217549103U discloses a high-intensity backwash multi-media filter. The device is provided with an anthracite filter frame, a coarse sand filter frame and a fine sand filter frame which are elastically swung by the cooperation of a pin shaft and a spring, and a flushing head connected to the backwash pipe on the booster spray pump is provided below the anthracite filter frame, the coarse sand filter frame and the fine sand filter frame. The backwash water is extracted by the booster spray pump and output to the flushing head through the backwash 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, coarse sand filter frame and fine sand filter frame. Since the right ends of the anthracite filter frame, coarse sand filter frame and fine sand filter frame are rotatably connected to the inner wall of the filter housing, the anthracite filter frame, coarse sand filter frame and 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, coarse sand filter frame and fine sand filter frame, further improving the filtering effect of impurities in sewage and cleaning large molecular impurities on the anthracite filter frame, coarse sand filter frame and fine sand filter frame.

[0004] However, this 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 inside the filter layer cannot be separated from the impurities, 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] 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 provided at the upper end of the tank body, a water outlet provided at the lower end of the tank body, and a water pipe, wherein the lower end of the tank body is provided with a support column, and the water outlet is used to supply water to the interior of the tank body during backwashing;

[0007] The pushing component includes a filter layer, a servo motor arranged at the upper end of the tank body, a flushing column arranged inside the filter 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.

[0008] As a preferred solution of the backwash 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.

[0009] As a preferred solution of the backwash multi-media filter device described in 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.

[0010] As a preferred solution of the backwash multi-media filter device described in the present invention, a rotating shaft is provided 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 provided on the outer wall of the rotating shaft, a connecting plate is provided on the outer wall of the movable ring, and a concave block is connected to the outer end of the connecting plate.

[0011] As a preferred solution of the backwash 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 concave block and slides with it.

[0012] 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.

[0013] As a preferred solution of the backwashing multi-media filter device of the present invention, a fixed disk is provided on the inner wall of the flushing column, a groove is provided on the end surface of the fixed disk, and a guide groove is also provided on the end surface of the fixed disk.

[0014] As a preferred solution of the backwash multi-media filter device described in the present invention, the lower end of the moving column is provided with a push plate, the lower end array of the push plate is provided with push teeth, the outer wall of the push teeth is provided with a second inclined surface, and the second inclined surface is in contact with the first inclined surface.

[0015] As a preferred solution of the backwash 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 slides with it.

[0016] As a preferred solution of the backwash 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 provided at the lower end of the connecting rod, a second sliding surface is provided on the outer wall of the moving block, a conical block is provided 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.

[0017] The beneficial effects of the present invention are as follows: when the connecting disk rotates, the water pipe below is driven to rotate under the filter layer, and water is sprayed into the filter layer from the bottom of the filter layer through the water nozzle on the surface of the water pipe, and the filter material at the bottom of the filter layer is rinsed with the backwash water flow, so that the filter material is separated 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 vortexes 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 impurity removal rate, making the effluent water quality clearer and meeting higher emission standards. Finally, the impurities are discharged 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 decline 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

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a backwashing multi-media filter device of the present invention;

[0020] Figure 2 It is a side sectional view of the tank body of the present invention;

[0021] Figure 3 Schematic diagram of the top structure of the water pipe in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the pushing component in the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement at point A;

[0024] Figure 6 is a side sectional view of the pushing assembly of the present invention;

[0025] Figure 7 Schematic diagram of the internal structure of the flushing column in the present invention;

[0026] Figure 8 This is a cross-sectional view of the internal structure of the spray column in the present invention.

[0027] 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 outlet; 1045, connecting plate; 1046, protrusion; 1047, first inclined surface; 1048, groove;

[0028] 200, push assembly; 201, filter layer; 202, servo motor; 2021, rotating shaft; 2022, movable ring; 2023, connecting plate; 2024, concave block; 2025, eccentric ring; 2026, circular 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

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. 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.

[0031] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0032] Example 1

[0033] Reference Figures 1 to 5 , which is the first embodiment of the present invention, provides a backwashing multi-media filter device.

[0034] Specifically, the flushing assembly 100 includes a tank body 101, a sewage outlet 102 provided at the upper end of the tank body 101, a water outlet 103 provided at the lower end of the tank body 101, and a water pipe 104. A support column 1011 is provided at the lower end of the tank body 101. The water outlet 103 is used to supply water to the interior of the tank body 101 during backwashing.

[0035] 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 motion 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 .

[0036] 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 a large amount of 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.

[0037] When backwashing begins, water is supplied to the inside of the tank body 101 from the water outlet 103 at the bottom. The water is injected into the inside from the bottom of the tank body 101, and the injected water spreads upward from the bottom, carrying the impurities inside the filter layer 201 and discharging them to the outside from the sewage outlet 102 to complete the cleaning of the filter layer 201.

[0038] The water pipe 104 is fixed at the bottom of the tank body 101, and another stream of water is transported to the interior 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 the water outlet 103, and the filter layer 201 is flushed from the bottom of the filter layer 201 upward.

[0039] And 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 the 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 upward and discharge the impurities from the sewage outlet 102.

[0040] 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 it 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.

[0041] At the same time, the operation of the servo motor 202 located at 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 backwash 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 backwash water and discharged from the sewage outlet 102.

[0042] Example 2

[0043] Reference Figures 1 to 6 , which is the second embodiment of the present invention, and is implemented based on the previous embodiment.

[0044] 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.

[0045] 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 be rotated at the top end of the water pipe 104, and the connection is sealed.

[0046] A water pipe 1043 is fixed horizontally at the top of the connector 1042, and a plurality of water nozzles 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 is then sprayed to the outside through the water nozzles 1044 on the surface of the water pipe 1043.

[0047] Preferably, a connecting disk 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 connecting disk 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 .

[0048] The connecting 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 connecting plate 1045 , with a groove 1048 formed between two adjacent protrusions 1046 , and each protrusion 1046 has a first inclined surface 1047 on its surface.

[0049] A rotating shaft 2021 is provided 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 provided on the outer wall of the rotating shaft 2021 , a connecting plate 2023 is provided 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 .

[0050] Among them, the rotating shaft 2021 is driven by the servo motor 202 to rotate inside the tank body 101. 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 by the connecting plate 2023. The edge of the concave block 2024 is close to the inner ring of the connecting disk 1045 and the two do not contact.

[0051] An eccentric ring 2025 is provided at the upper end of the movable ring 2022, and 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. The lower end of the first connecting rod 2027 is connected to the first movable block 2028. The outer wall of the first movable block 2028 extends to the inner wall of the concave block 2024 and slides with it.

[0052] Among them, the eccentric ring 2025 is fixed on the outside of the rotating shaft 2021 and rotates together 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.

[0053] A first connecting rod 2027 is fixed to the outside of the 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 will slide into the groove 1048 of the outer ring of the connecting disk 1045.

[0054] 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.

[0055] 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. The top of the second connecting rod 2029 is also hinged with a second movable block 20210. 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, when sliding forward, it will slide into the groove 1048 of the outer ring of the connecting disk 1045.

[0056] 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 concave block 2024 at the end of the connecting plate 2023 with the movement of the circular ring 2026. At the same time, the lower connecting plate 2023 swings back and forth with the circular ring 2026. When the first movable block 2028 slides out of the concave block 2024, the second movable block 20210 slides backward inside the fixed rod 20212, and vice versa.

[0057] 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.

[0058] In summary, when in use, back-impact water is injected into the interior from the water outlet 103, spreading from the bottom to the top of the tank body 101, and 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 the water flows toward the filter layer 201 through the water nozzle 1044 on the surface of the water pipe 1043 at the top of the connector 1042, and enters the interior 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 backwash water.

[0059] 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 the angle of one groove 1048.

[0060] 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 one angle of the groove 1048. The water pipe 1043 rotates slowly at the top of the water supply pipe 104. The multiple water nozzles 1044 arranged on the upper end face 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 material 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.

[0061] Example 3

[0062] Reference Figures 6 to 8 , which is the third embodiment of the present invention, and is implemented based on the previous embodiment.

[0063] Specifically, a fixing disk 2031 is provided on the inner wall of the flushing column 203 , a slot 2032 is provided on the end surface of the fixing disk 2031 , and a guide slot 2033 is also provided on the end surface of the fixing disk 2031 .

[0064] 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 interior of the flushing column 203 from the bottom of the flushing column 203. A plurality of fixed disks 2031 are provided on the inner wall of the flushing column 203, and a plurality of grooves 2032 are provided on the surface of the fixed disk 2031 for the back-impact water at the bottom to enter the interior of the flushing column 203.

[0065] Preferably, a push disk 2041 is provided at the lower end of the motion column 204 , and a push tooth 2042 is arranged in an array at the lower end of the push disk 2041 . A second inclined surface 2043 is provided on the outer wall of the push tooth 2042 , and the second inclined surface 2043 is in contact with the first inclined surface 1047 .

[0066] Among them, the moving column 204 is sleeved on the outside of the rotating shaft 2021, and a protruding rod is fixed on the surface of the pushing disk 2041 below. The protruding rod is movably connected to a small hole opened at the bottom of the filter layer 201. Under the influence of the protruding rod, the moving column 204 will not rotate with the rotation of the rotating shaft 2021.

[0067] The outer ring array on the lower surface of the pushing disk 2041 has multiple pushing teeth 2042, which are engaged in the groove 1048 on the upper surface of the connecting disk 1045. 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 affected by the rotating shaft 2021 to rotate, the first inclined surface 1047 is close to 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.

[0068] A convex ring 2044 is provided on the outer wall of the moving column 204, and 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. The outer wall of the pushing ring 2046 is hinged with a hinge rod 2047, and 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, and the upper end of the slider 2048 is provided with a limiting block 20410. The limiting block 20410 extends to the outer wall of the guide groove 2033 and slides with it.

[0069] 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 together 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.

[0070] The surface of the pushing ring 2046 is hinged with multiple hinged rods 2047, and the top of the hinged rod 2047 is hinged with a slider 2048. The limit block 20410 set on the upper end face of the slider 2048 passes through the 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.

[0071] Preferably, a limiting ring 2051 is fixed on the inner wall of the spray column 205, and an opening 2052 is also opened on the inner wall of the spray column 205. A connecting rod 2053 is movably provided inside the spray column 205, and a moving block 2054 is provided at the lower end of the connecting rod 2053. The outer wall of the moving block 2054 is provided with a second sliding surface 2055, and the upper end of the connecting rod 2053 is provided with a conical block 2056. The lower end of the conical block 2056 is sleeved with a second elastic member 2057. 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.

[0072] 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 between the limiting ring 2051 and the opening 2052. The second elastic member 2057 is located between 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.

[0073] The second sliding surface 2055 of the moving block 2054 at the lower end of the connecting rod 2053 fits 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 out to the outside in a vortex shape through the vortex nozzle 2058 at the top of the spray column 205, thereby cleaning the filter material in the filter layer 201 outside the spray column 205, and further separating the filter material and impurities inside the filter layer 201.

[0074] 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, causing it to loosen inside the filter layer 201, which is conducive to the back-impact water flow to clean this part of the filter material. While the rotating shaft 2021 drives the flushing column 203 to rotate in the middle of the filter layer 201, the bottom connecting plate 1045 rotates together 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.

[0075] When the push disk 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 pushing ring 2046 upward. When the pushing ring 2046 moves upward, it will push the slider 2048 to slide outward under the fixed disk 2031. When the slider 2048 slides, the moving block 2054 fitted with it will be driven backward, and the conical block 2056 at the end moves backward, squeezing the second elastic member 2057. At the same time, a gap appears between the backwash water inside the flushing column 203 and 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 spraying column 205 in the gap, and is sprayed outward in a vortex shape through the vortex nozzle 2058 at the top.

[0076] 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.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. 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 backwash multi-media filter device, characterized in that: include: A flushing assembly (100) comprises a tank body (101), a sewage outlet (102) provided at the upper end of the tank body (101), a water outlet (103) provided at the lower end of the tank body (101), and a water pipe (104), wherein a support column (1011) is provided 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 propulsion assembly (200) comprising 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 motion 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 pipe (104) is provided with a solenoid valve (1041) at one end of the outer wall of the tank body (101), and a connector (1042) is provided at one end of the water pipe (104) at 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 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 connecting disk (1045), the upper end of the connecting disk (1045) is provided with a protrusion (1046) in an 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); A fixed disk (2031) is provided on the inner wall of the flushing column (203), a groove (2032) is provided on the end surface of the fixed disk (2031), and a guide groove (2033) is also provided on the end surface of the fixed disk (2031); 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 with it; A limiting 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).

2. The backwashing multi-media filter device according to claim 1, characterized in that: A rotating shaft (2021) is provided 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 provided on the outer wall of the rotating shaft (2021), a connecting plate (2023) is provided on the outer wall of the movable ring (2022), and the outer end of the connecting plate (2023) is connected to a concave block (2024).

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 is slidably engaged therewith.

4. The backwashing multi-media filter device according to claim 3, characterized in that: The outer wall of the circular ring (2026) is further 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 lower end of the motion column (204) is provided with a push disk (2041), the lower end of the push disk (2041) is provided with a push teeth (2042) in an array, the outer wall of the push teeth (2042) is provided with a second inclined surface (2043), and the second inclined surface (2043) is in contact with the first inclined surface (1047).

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