A V-type filter backwash device based on ultrasonic waves

Abstract

The application discloses a V-shaped filter tank backwashing device based on ultrasonic waves and relates to the technical field of filter tank backwashing, which comprises a filter tank and an ultrasonic cleaning element. The cavitation effect in liquid is caused by the ultrasonic frequency generated by the ultrasonic transducer. The dissolved gas in the liquid forms tiny bubbles under the action of the sound wave. The bubbles are periodically expanded and compressed with the sound wave, continuously vibrate, and the cavitation bubble shock wave destroys the adsorption of pollutants and the surface of filter material. The attachments such as organic matter, colloid and microorganism are fatigued and fall off. The residual pollutants are further removed. The sound wave is transmitted into the water through the sound-transmitting gel inside the elastic wrapping sleeve. The sound-transmitting gel can reduce the loss of sound wave energy. The damper further alleviates the vibration caused by the ultrasonic wave, protects the stainless steel filter plate, and improves the stripping effect of the surface sludge and impurities through the vibration ball reserved in the coarse sand, thereby improving the backwashing effect.

Description

Technical Field

[0001] This invention relates to the field of filter backwashing technology, and more specifically, to a V-type filter backwashing device based on ultrasound. Background Technology

[0002] V-type filters are a widely used high-efficiency filtration structure in water treatment processes. They have a reasonable structural design and stable operation, playing an important role in urban water supply and sewage treatment. However, during actual operation, as suspended solids, colloids, and microorganisms in the water to be treated are continuously trapped in the filter media layer, an adhesion layer gradually forms on the surface of the filter media. This leads to a decrease in the porosity of the filter layer and an increase in water flow resistance, which in turn causes problems such as filter blockage, shortened filtration cycle, and fluctuations in effluent water quality. To restore the filtration performance of the filter, it is necessary to perform backwashing operations regularly.

[0003] Currently, V-type filters generally adopt a combined air-water backwashing method, which involves backwashing with air and water simultaneously, causing the filter media particles to rub against each other due to gas disturbance and water flow impact, thereby removing the attached sludge; then, they are rinsed separately with clean water to further remove residual impurities. In addition, during the backwashing process, the filter still maintains a small amount of water intake, and water is sprayed through small holes at the bottom of the V-shaped channel to sweep the water surface, which helps to guide the floating impurities to the drainage channel for discharge.

[0004] In practical applications, existing technologies suffer from problems such as high compaction of filter media in V-type filters, small gaps between filter media particles and poor flowability during backwashing, resulting in low vibration and friction between filter media during air and water backwashing. Consequently, sludge adhering to the filter media is difficult to remove. Relying solely on air and water backwashing is insufficient to meet the requirements for efficient and thorough cleaning of the filter media. Therefore, to address the aforementioned technical issues, it is necessary to provide an ultrasonic-based V-type filter backwashing device. Summary of the Invention

[0005] The purpose of this invention is to provide an ultrasonic-based V-type filter backwashing device to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] An ultrasonic-based V-type filter backwashing device includes:

[0008] The filter tank has a water collection trough at the bottom of its inner cavity, a vacuum pump installed on the outer wall of the water collection trough, multiple drain pipes embedded and fixed in the upper part of the inner cavity, a stainless steel filter plate fixedly connected to the inner cavity, a support layer covering the stainless steel filter plate, a filter media layer covering the support layer, a drain trough in the inner cavity of the filter tank, an air and water distribution channel in the inner cavity of the water collection trough, a water distribution hole below the air and water distribution channel, an air distribution hole above the air and water distribution channel, and multiple vibrating balls mixed inside the support layer.

[0009] An ultrasonic cleaning component includes multiple protective covers fixedly connected to the lower surface of a stainless steel filter plate. An ultrasonic transducer is fixedly connected to the bottom of the inner cavity of the protective cover and communicates with its interior. An elastic sleeve is fixedly connected to the upper end of the stainless steel filter plate and the inner cavity of the protective cover. The inner cavity of the elastic sleeve is filled with sound-transmitting gel. A vibrating plate is installed on the upper surface of the stainless steel filter plate.

[0010] A damper is fixedly connected to the middle of the lower surface of the protective cover, and the lower end of the damper is fixedly connected to the bottom of the inner cavity of the filter tank. The protective cover is welded and fixed to the stainless steel filter plate.

[0011] The transmitting end of the ultrasonic transducer abuts against the lower surface of the elastic sleeve, which is made of a transparent material.

[0012] The vibrating plate includes a protective layer fixedly connected to the upper surface of the stainless steel filter plate. The protective layer has filter holes corresponding to the stainless steel filter plate, and multiple arc-shaped covers are uniformly fixedly connected to the protective layer.

[0013] The arc-shaped cover is located directly above the protective cover and both have the same diameter. The outer surface of the arc-shaped cover has multiple water inlet holes.

[0014] An elastic plate is fixedly connected to the inner cavity of the arc-shaped cover, and a magnetic block is embedded and fixed in the inner cavity of the elastic plate.

[0015] The vibrating ball comprises lightweight spheres uniformly mixed within the support layer, wherein the lightweight spheres are hollow inside.

[0016] The lightweight sphere has a movably connected magnetic block two inside its cavity, and the magnetic block two is spherical.

[0017] Multiple elastic rods are uniformly fixedly connected to the outer surface of the lightweight sphere, and the elastic rods are interspersed inside the support layer.

[0018] The filter media layer is composed of quartz sand, and the support layer is composed of coarse quartz sand.

[0019] Compared with the prior art, the advantages of this invention are:

[0020] (1) In this scheme, compressed air is injected into the filter media layer through the air distribution hole of the air distribution channel. During the rise of the air bubbles, the filter media is agitated, causing the filter media to vibrate slightly, enhancing the collision and friction between particles, removing mud balls and flocculents on the surface of the filter media, and initially loosening the pollutants. Then, backwash water is injected through the water distribution hole. The water flow direction is opposite to the filtration direction. The high-speed water flow washes the loosened pollutants along with the debris generated by the cavitation effect into the drainage tank. The upper and lower filter tanks share a set of backwashing and water inlet and outlet systems. The cleaning of the two layers of filter media is controlled by independent drainage tanks and air distribution channels. The double-layer filter tank achieves twice the filtration capacity in the same area, reducing the treatment cost.

[0021] (2) This scheme uses the ultrasonic frequency generated by the ultrasonic transducer to induce cavitation effect in the liquid. The dissolved gas in the liquid forms tiny bubbles under the action of sound waves. The bubbles expand and compress periodically with the sound waves and vibrate continuously. The cavitation bubble shock wave destroys the adsorbents on the surface of the filter material and causes organic matter, colloids, microorganisms and other attachments to fatigue and fall off, further removing residual pollutants. The sound waves are transmitted to the water through the sound-permeable gel inside the elastic sleeve. The sound-permeable gel can reduce the loss of sound wave energy. The damper further alleviates the vibration caused by the ultrasonic waves and protects the stainless steel filter plate.

[0022] (4) The arc-shaped cover of this scheme is located directly above the sound-permeable gel. The water source inside it receives the strongest sound wave energy. At this time, the cavitation bubbles generated by the water source inside the arc-shaped cover will release a high-intensity impact force instantly when they burst, impacting the elastic plate and causing it to vibrate at a low frequency. When the elastic plate vibrates, the lightweight sphere is driven to vibrate through the magnetic force of the magnetic block one and magnetic block two inside. The lightweight sphere generates random rolling and collision under the combined action of the cavitation bubbles generated by the ultrasonic wave and the elastic plate. The lightweight sphere and the elastic rod on its outer surface reciprocate to impact the large particles of quartz sand in the support layer, impacting and resonating the coarse sand. It can also rub against its surface to improve the peeling effect of surface sludge and impurities, thus improving the cleaning effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a partial structural diagram of the present invention;

[0025] Figure 3 This is a partial cross-sectional view of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the arc-shaped cover structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the ultrasonic cleaning component of the present invention after disassembly.

[0029] Figure 7 This is a schematic diagram of the vibrating ball structure of the present invention;

[0030] Figure 8 This is a schematic cross-sectional view of the vibrating ball structure of the present invention.

[0031] Explanation of the labels in the diagram:

[0032] 1. Filter bed; 2. Water collection tank; 3. Vacuum pump; 4. Drain pipe; 5. Stainless steel filter plate; 6. Support layer; 7. Filter media layer; 8. Drain trough; 9. Air and water distribution channel; 10. Water distribution hole; 101. Air distribution hole; 11. Ultrasonic cleaning component; 1101. Protective cover; 1102. Damper; 1103. Ultrasonic transducer; 1104. Elastic wrapping sleeve; 1105. Sound-permeable gel; 12. Vibrating plate; 1201. Protective layer; 1202. Arc-shaped cover; 1203. Water inlet; 1204. Elastic plate; 1205. Magnetic block one; 13. Vibrating ball; 1301. Lightweight ball; 1302. Elastic rod; 1303. Magnetic block two. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please see Figures 1-3 An ultrasonic-based V-type filter backwashing device includes a filter 1 and an ultrasonic cleaning component 11. A water collection tank 2 is provided at the bottom of the inner cavity of the filter 1. A vacuum pump 3 is installed on the outer wall of the water collection tank 2. Multiple drain pipes 4 are embedded and fixed in the upper part of the inner cavity of the filter 1. A stainless steel filter plate 5 is fixedly connected to the inner cavity of the filter 1. A support layer 6 is covered on the stainless steel filter plate 5. A filter media layer 7 is covered on the support layer 6. A drain trough 8 is provided in the inner cavity of the filter 1. An air and water distribution channel 9 is provided in the inner cavity of the water collection tank 2. A water distribution hole 10 is provided below the air and water distribution channel 9. An air distribution hole 101 is provided above the air and water distribution channel 9.

[0036] Specifically, the water to be treated enters the filter tank 1 through the pre-embedded drain pipe 4 at the top of the filter tank 1. The drain pipe 4 is distributed along the filter tank 1. When the water flows through the filter media layer 7 (quartz sand or sea sand with a particle size of 0.85-1.2 mm), suspended solids, colloids, microorganisms and other pollutants are trapped on the surface or in the internal pores of the filter media, thus purifying the water. The support layer 6 (coarse quartz sand with a particle size of 2-4 mm) supports the filter media layer 7 to prevent the filter media from being lost and to evenly distribute the water flow. The vacuum pump 3 creates negative pressure (the body of the vacuum pump 3 is installed on the outer wall and is connected to the inside of the water collection tank 2 through a pipe) to enhance the filtration speed. The stainless steel filter plate 5 isolates the filter media from the lower water collection tank 2. The vacuum pump 3 draws air from the water collection tank 2 to create a local negative pressure environment, which increases the water flow speed and keeps the seepage path unchanged. Pollutants are adsorbed or trapped on the surface of the filter media. The clean water enters the water collection tank 2 through the pores of the stainless steel filter plate 5 and is discharged through the pipe.

[0037] Filter pool 1 is made of reinforced concrete with smooth inner wall and is resistant to acid and alkali corrosion. Drainage pipe 4 is pre-embedded at the top of filter pool 1. The pipe diameter is designed according to the water volume to ensure stable water flow. Water collection tank 2 is located at the bottom of filter pool 1 and is used to collect filtered clean water.

[0038] The air and water distribution channel 9 integrates water distribution holes 10 and air distribution holes 101 for inputting an air-water mixture during backwashing. During backwashing of the filter media, compressed air is injected into the filter media layer 7 through the air distribution holes 101 of the air and water distribution channel 9. As the air bubbles rise, they agitate the filter media, causing slight vibration and enhancing particle collision and friction, removing mud balls and flocculent matter from the filter media surface, and initially loosening contaminants. Backwash water is injected through the water distribution holes 10, with the water flow direction opposite to the filtration direction. The high-speed water flow carries the loosened contaminants, along with debris generated by cavitation, into the drainage trough 8. A double-layer filter structure can be designed as needed, supported by a concrete structure. The upper and lower filter layers 1 share a single backwashing and inlet / outlet water system. The cleaning of the two filter media layers is controlled separately through independent drainage troughs 8 and the air and water distribution channel 9. The double-layer filter 1 achieves twice the filtration capacity within the same floor area, reducing treatment costs.

[0039] The diameters of the water distribution hole 10 and the air distribution hole 101 are designed according to the backwashing intensity requirements. The drainage trough 8 is located on the upper part of the filter tank 1 to ensure that the backwashing wastewater is discharged quickly and to avoid secondary pollution.

[0040] Example 2

[0041] Please see Figure 1 , Figure 2 , Figure 3 , Figure 6An ultrasonic-based V-type filter backwashing device further includes an ultrasonic cleaning component 11, comprising multiple protective covers 1101 fixedly connected to the lower surface of a stainless steel filter plate 5. An ultrasonic transducer 1103 is fixedly connected to the bottom of the inner cavity of the protective cover 1101 and communicates with its interior. An elastic sleeve 1104 is fixedly connected to the upper end of the inner cavity of the stainless steel filter plate 5 and the protective cover 1101. The inner cavity of the elastic sleeve 1104 is filled with sound-permeable gel 1105. A vibrating plate 12 is installed on the upper surface of the stainless steel filter plate 5.

[0042] Specifically, a damper 1102 is fixedly connected to the middle of the lower surface of the protective cover 1101. The lower end of the damper 1102 is fixedly connected to the bottom of the inner cavity of the filter tank 1. The protective cover 1101 is welded and fixed to the stainless steel filter plate 5. The transmitting end of the ultrasonic transducer 1103 abuts against the lower surface of the elastic sleeve 1104. The elastic sleeve 1104 is made of transparent material.

[0043] An ultrasonic transducer 1103 is installed at the bottom of the inner cavity of the protective cover 1101. The protective cover 1101 is installed below the stainless steel filter plate 5 and absorbs some of the vibration energy through a damper 1102, reducing mechanical fatigue damage to the stainless steel filter plate 5 caused by ultrasonic vibration. The protective cover 1101 is made of stainless steel and integrally welded with the stainless steel filter plate 5 to avoid gaps that could allow moisture to enter, thus protecting the ultrasonic transducer 1103 and preventing debris from entanglement. The damper 1102 is either a rubber damper or a spring damper, effectively absorbing vibration energy and reducing mechanical fatigue damage to the stainless steel filter plate 5.

[0044] The ultrasonic transducer 1103 generates ultrasonic frequencies (typically 20-100 kHz) that induce cavitation in the liquid. Dissolved gases in the liquid form tiny cavitation bubbles under the influence of sound waves. These bubbles periodically expand and compress with the sound waves, vibrating continuously. The shock waves from these cavitation bubbles disrupt the adsorption bonds between pollutants and the surface of the filter media (quartz sand), causing organic matter, colloids, microorganisms, and other adhering substances to fatigue and detach. The shear force generated by the bubble vibration directly scrubs the surface of the filter media, further removing residual pollutants. The sound waves are transmitted into the water through the acoustically permeable gel 1105 inside the elastic sheath 1104. The acoustically permeable gel 1105 reduces the loss of sound wave energy, and its acoustic impedance is close to that of water, ensuring efficient transmission of ultrasonic waves into the water.

[0045] Example 3

[0046] Please see Figures 1-8 A V-shaped filter backwashing device based on ultrasound also includes multiple vibrating balls 13 mixed inside the support layer 6, and a vibrating plate 12 installed on the upper surface of the stainless steel filter plate 5.

[0047] Specifically, the vibrating plate 12 includes a protective layer 1201 fixedly connected to the upper surface of the stainless steel filter plate 5. The protective layer 1201 has filter holes corresponding to the stainless steel filter plate 5. Multiple arc-shaped covers 1202 are uniformly fixedly connected to the protective layer 1201. An elastic plate 1204 is fixedly connected to the inner cavity of the arc-shaped cover 1202. A magnetic block 1205 is embedded and fixed in the inner cavity of the elastic plate 1204.

[0048] The upper surface of the stainless steel filter plate 5 is isolated from the impact of cavitation bubbles by a protective layer 1201 (such as tungsten carbide, ceramic coating or elastic polymer coating). This prevents the instantaneous high pressure and micro-jet generated when ultrasonic cavitation bubbles break down from reaching thousands of atmospheres, which would cause high-frequency impact on the surface of the stainless steel filter plate 5. Long-term action may lead to cavitation corrosion, similar to "the metal surface being continuously bombarded by micro-explosions", which manifests as pitting, dents or even penetrating holes on the surface, thus affecting the strength of the stainless steel filter plate 5.

[0049] The arc-shaped cover 1202 is located directly above the protective cover 1101 and the two have the same diameter. Multiple water inlet holes 1203 are provided on the outer surface of the arc-shaped cover 1202.

[0050] The inside of the arc-shaped cover 1202 is filled with water through the water inlet 1203. Since the arc-shaped cover 1202 is located directly above the sound-permeable gel 1105, the water inside it receives the strongest sound wave energy. At this time, the cavitation bubbles generated by the water inside the arc-shaped cover 1202 burst and release a high-intensity impact force, which impacts the elastic plate 1204 and causes it to vibrate at a low frequency. The diameter of the water inlet 1203 is smaller than that of the quartz sand in the filter media layer 7 to prevent the filter media from entering and causing accumulation and blockage. The elastic plate 1204 has good elasticity and corrosion resistance.

[0051] The vibrating ball 13 includes a lightweight ball 1301 uniformly mixed inside the support layer 6. The lightweight ball 1301 is a hollow ball. A magnetic block 1303 is movably connected to the inner cavity of the lightweight ball 1301. The magnetic block 1303 is spherical. Multiple elastic rods 1302 are uniformly fixedly connected to the outer surface of the lightweight ball 1301. The elastic rods 1302 are interspersed inside the support layer 6.

[0052] When the elastic plate 1204 vibrates, the magnetic force of the internal magnetic block 1205 and magnetic block 1303 drives the lightweight sphere 1301 to vibrate as well. Under the combined action of the cavitation bubbles generated by the ultrasonic waves and the elastic plate 1204, the lightweight sphere 1301 rolls and collides randomly. The lightweight sphere 1301 and the elastic rod 1302 on its outer surface reciprocate to impact the large particles of quartz sand in the support layer 6. This physical impact, combined with the ultrasonic cavitation effect and the air-water backwash, effectively destroys the pollutant agglomerates in the gaps between the large particles of quartz sand, improves the cleaning effect, and helps the large particles of quartz sand to remove stains better.

[0053] Magnetic block 1205 is made of neodymium iron boron permanent magnet, which enables it to generate a strong attraction force. Magnetic block 1303 is made of ferromagnetic material, which is easily magnetized under an external magnetic field. Due to its sensitivity to the magnetic field generated by neodymium iron boron, magnetic block 1303 can be effectively attracted by magnetic block 1205. When magnetic block 1205 moves due to the low-frequency vibration of the elastic plate 1204, its strong magnetic force is transmitted to magnetic block 1303 through space, causing magnetic block 1303 to be attracted to and move with it. In this way, synchronous movement can be achieved even without direct physical contact between the two.

[0054] The vibrating balls 13 are mixed in the support layer 6 and support it together. The size of the vibrating balls 13 is smaller than the coarse quartz sand in the support layer 6 and larger than the fine quartz sand in the filter layer 7, and they just fill the gaps in the support layer 6.

[0055] Working principle: The water to be treated flows evenly into the inner cavity of filter tank 1 through the pre-embedded drainage pipe 4 at the top of filter tank 1. The drainage pipe 4 distributed along filter tank 1 ensures a stable inflow rate. The water flows from top to bottom through the filter media layer 7, the support layer 6, and the stainless steel filter plate 5. The filter media layer 7 traps suspended solids, colloids, microorganisms, and other pollutants in the water through its porous structure, thus purifying the water. The support layer 6 supports the filter media layer 7 to prevent loss and evenly distributes the water flow to avoid local overflow. The vacuum pump 3 is connected to the water collection tank 2 at the bottom of filter tank 1 through a pipe, creating a local negative pressure environment by evacuating the water collection tank 2. This negative pressure enhances the driving force for water to flow through the filter media layer 7, increasing the filtration speed without changing the permeation diameter, so that pollutants are more efficiently adsorbed or trapped by the surface of the filter media. The filtered clean water enters the water collection tank 2 through the pores of the stainless steel filter plate 5 and is finally discharged through the pipe.

[0056] The backwashing process consists of three coordinated stages: air flushing, water flushing, and ultrasonic-assisted cleaning. When backwashing begins, compressed air is injected into the area below the filter media layer 7 through the air distribution hole 101 of the air and water distribution channel 9. As the air bubbles rise, they agitate the filter media, causing it to vibrate slightly. This initial loosening of the mud balls and flocculent matter on the filter media surface is achieved through inter-particle collision and friction. Subsequently, backwash water is injected through the water distribution hole 10, flowing in the opposite direction to the filtration stage. The high-speed water flow washes the loosened contaminants to the drainage trough 8 at the top of the filter tank 1, achieving the initial cleaning of the filter media using traditional air-water backwashing. Then, the ultrasonic cleaning component 11, fixed to the lower surface of the stainless steel filter plate 5, is activated simultaneously: the ultrasonic transducer 1103 generates high-frequency vibrations of 20-100kHz, transmitting the sound energy to the water above the stainless steel filter plate 5 through the sound-permeable gel 1105, inducing cavitation. This breaks the adsorption bonds between contaminants and the surface of the quartz sand filter media, causing organic matter, colloids, and other adhering substances to detach. Simultaneously, shear force directly scrubs away residual contaminants on the filter media surface.

[0057] The elastic plate 1204 inside the arc-shaped cover 1202 is vibrated by cavitation impact, which drives the magnetic block 1205 to move synchronously. Through magnetic force, it drives the vibrating ball 13 inside the support layer 6. The magnetic block 1303 inside the lightweight ball 1301 of the vibrating ball 13 interacts with the magnetic block 1205, causing the lightweight ball to roll randomly and collide with the coarse quartz sand in the gap of the support layer 6. The elastic rod 1302 on the outer surface reciprocates to impact the particle surface, destroying the pollutant agglomerates in the gaps of the large particles of quartz sand.

[0058] The ultrasonic cavitation effect and air-water backwashing form a multi-layer cleaning mechanism. The water distribution hole 10 and air distribution hole 101 are designed with diameters based on the backwashing intensity to ensure uniform distribution of the air-water mixture. The drainage trough 8, located at the top of the filter tank 1, quickly discharges backwash wastewater, preventing secondary pollution. The double-layer filter structure controls the cleaning of the two filter media through independent drainage troughs 8 and air-water distribution channels 9, achieving double the filtration capacity within the same floor space and reducing treatment costs. Throughout the operation, the vacuum pump 3, ultrasonic transducer 1103, and vibrating plate 12 work together to combine the mechanical loosening of traditional air-water backwashing, the physical stripping of ultrasonic cavitation, and the physical impact of the vibrating ball 13, significantly improving the filter media cleaning efficiency, extending the filtration cycle, and ensuring the efficient and stable operation of the V-type filter tank.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A V-type filter backwashing device based on ultrasound, characterized in that: include: A filter tank (1) has a water collection tank (2) at the bottom of its inner cavity. A vacuum pump (3) is installed on the outer wall of the water collection tank (2). Multiple drain pipes (4) are embedded and fixed in the upper part of the inner cavity of the filter tank (1). A stainless steel filter plate (5) is fixedly connected to the inner cavity of the filter tank (1). A support layer (6) is covered on top of the stainless steel filter plate (5). A filter media layer (7) is covered on top of the support layer (6). A drain trough (8) is provided in the inner cavity of the filter tank (1). The water collection tank (2) has an air and water distribution channel (9) in its inner cavity. A water distribution hole (10) is provided below the air and water distribution channel (9). An air distribution hole (101) is provided above the air and water distribution channel (9). The support layer (6) contains a plurality of vibrating balls (13). The vibrating balls (13) include lightweight spheres (1301) uniformly mixed inside the support layer (6). A magnetic block two (1303) is movably connected to the inner cavity of the lightweight spheres (1301). An ultrasonic cleaning component (11) includes multiple protective covers (1101) fixedly connected to the lower surface of a stainless steel filter plate (5). An ultrasonic transducer (1103) is fixedly connected to the bottom of the inner cavity of each protective cover (1101) and communicates with its interior. An elastic sleeve (1104) is fixedly connected to the upper end of the inner cavity of the stainless steel filter plate (5) and the protective cover (1101). The inner cavity of the elastic sleeve (1104) is filled with sound-permeable gel (1105). A vibrating plate (12) is mounted on the upper surface of the stainless steel filter plate (5). The plate (12) includes a protective layer (1201) fixedly connected to the upper surface of the stainless steel filter plate (5). The protective layer (1201) has filter holes corresponding to the stainless steel filter plate (5). Multiple arc-shaped covers (1202) are uniformly fixedly connected to the protective layer (1201). Multiple water inlet holes (1203) are opened on the outer surface of the arc-shaped cover (1202). An elastic plate (1204) is fixedly connected to the inner cavity of the arc-shaped cover (1202). A magnetic block (1205) is embedded and fixed in the inner cavity of the elastic plate (1204).

2. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: A damper (1102) is fixedly connected to the middle of the lower surface of the protective cover (1101). The lower end of the damper (1102) is fixedly connected to the bottom of the inner cavity of the filter tank (1). The protective cover (1101) is welded and fixed to the stainless steel filter plate (5).

3. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The transmitting end of the ultrasonic transducer (1103) abuts against the lower surface of the elastic sleeve (1104), which is made of transparent material.

4. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The arc-shaped cover (1202) is located directly above the protective cover (1101) and the two have the same diameter.

5. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The lightweight sphere (1301) is a hollow sphere.

6. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The second magnetic block (1303) is spherical.

7. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The outer surface of the lightweight sphere (1301) is uniformly fixed with multiple elastic rods (1302), and the elastic rods (1302) are interspersed inside the support layer (6).

8. The backwashing device for a V-type filter based on ultrasound according to claim 1, characterized in that: The filter media layer (7) is composed of quartz sand, and the support layer (6) is composed of coarse quartz sand.

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