U-shaped siphon filter tank with automatic backwashing function

Abstract

The utility model relates to the technical field of water treatment, in particular to a U-shaped siphon filter tank with an automatic backwashing function. A U-shaped siphon filter tank with an automatic backwashing function comprises a filter tank body, a clear water collecting channel, a water inlet channel, a water inlet pipe and the like, the internal structure of the filter tank body is bilaterally symmetrical, the clear water collecting channel is arranged in the middle of the filter tank body, and a group of partition plates are arranged between the left side and the right side in the filter tank body and the clear water collecting channel respectively. The upper parts of the partition plates are jointly connected with a water inlet channel, the inner part of the filter body and the front side of the water inlet channel are respectively connected and communicated with water inlet pipes, and the two water inlet pipes are symmetrically arranged. The automatic switch assembly is arranged, the floating plate ascends along with the liquid level of the water inlet channel to drive the rack and the gear to drive the valve ball to close the water inlet pipe, water inlet is automatically cut off, and the automation degree and the response reliability of system operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a U-shaped siphon filter with automatic backwashing function. Background Technology

[0002] In water treatment processes, filtration is a crucial step in ensuring effluent quality and is widely used in water supply treatment, reclaimed water reuse, and wastewater treatment. U-shaped siphon filters, as a common gravity filtration device, are widely used in small and medium-sized water treatment systems due to their simple structure, stable operation, and lack of backwash pump requirements. Their working principle is based on the siphon effect to automatically switch between the influent and backwashing processes. Typically, the formation and breakdown of the siphon are controlled by changes in the liquid level, thus completing the cyclical operation of filtration-backwashing-re-filtration.

[0003] However, existing U-shaped siphon filters still have several technical drawbacks. First, traditional structures often rely on complex external control devices or manual intervention to initiate the backwashing process, resulting in low automation and a tendency for filter media blockage or effluent quality deterioration due to delayed response. Second, uneven water flow distribution during backwashing can lead to filter media loss or incomplete rinsing, affecting subsequent filtration efficiency. Third, after long-term operation, the filter media tends to accumulate highly adhesive contaminants, which are difficult to remove effectively by hydraulic backwashing alone, leading to shortened filtration cycles and a rapid increase in head loss. Furthermore, existing filters often use manual or electric valves for inlet control, which not only increases operating and maintenance costs but also results in poor reliability in unattended scenarios.

[0004] Therefore, it is necessary to design a U-shaped siphon filter with automatic backwashing function to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of existing U-shaped siphon filters, such as low automation, incomplete backwashing, easy clogging of the filter layer, and reliance on manual intervention, this utility model provides a U-shaped siphon filter with automatic backwashing function.

[0006] The technical solution is as follows: A U-shaped siphon filter with automatic backwashing function includes a filter body, a clear water collection channel, an inlet channel, an inlet pipe, a backwash wastewater collection channel, a siphon assembly, and an automatic switch assembly. The internal structure of the filter body is symmetrical from left to right. The clear water collection channel is located in the middle of the filter body. A set of partition plates is provided between the left and right sides of the filter body and the clear water collection channel. Multiple partition plates are arranged laterally on each side. The upper part of each partition plate is connected to the inlet channel. The filter body and the front side of the inlet channel are respectively connected to and communicate with the inlet pipe. The two inlet pipes are arranged symmetrically, and the two inlet channels are far apart. A unit inlet trough is located on the lower side of the filter body. The lower part of the unit inlet trough has an arc-shaped structure. A backwash wastewater collection channel is provided between the adjacent partition plates of each group. The lower part of the backwash wastewater collection channel also has an arc-shaped structure. The backwash wastewater collection channel is located below the unit inlet trough. The two are arranged vertically in a staggered manner. A backwash drainage trough is opened on the side of each group of backwash wastewater collection channels away from the clean water collection channel. Filter components are respectively provided between the lower parts of each group of partition plates. Siphon components are provided between the inlet channel and the unit inlet trough and backwash wastewater collection channel of each group. Two sets of automatic switch components are provided between the front side of the filter body and its interior.

[0007] More preferably, the filter assembly includes a fixed sleeve, a sliding frame, a filter layer, and a spring. The side wall of each partition plate that is close to each other is located below the backwash wastewater collection channel and is symmetrically fixedly connected with a fixed sleeve. A sliding frame is slidably connected inside every four fixed sleeves. The sliding frame is located between the partition plate and the backwash wastewater collection channel. A filter layer is provided on the inner side of the top of the sliding frame. A spring connects the sliding frame and the fixed sleeve.

[0008] More preferably, it also includes a clear water chamber and a clear water supply pipe. The clear water chamber is formed between the lower part of each set of backwash wastewater collection channels and the clear water collection channel. Water outlets are opened at the bottom of the clear water collection channel corresponding to each set of partition plates. The upper part of the filter body is connected to and connected to the clear water supply pipe in front of the clear water collection channel.

[0009] More preferably, the siphon assembly includes an inlet siphon pipe, a backwash siphon pipe, a backwash drainage branch pipe, and a water pump. Each set of partition plates is provided with an inlet siphon pipe between the inlet channel and the unit inlet tank. The backwash siphon pipe connects the clear water chamber and the backwash wastewater collection channel. The bottom of each set of backwash siphon pipes near the clear water chamber is connected to and connected to a backwash drainage branch pipe. A water pump is provided in front of the backwash drainage branch pipe.

[0010] More preferably, it also includes an ultrasonic transducer and an ultrasonic generator. Each sliding frame is equipped with an ultrasonic transducer at its lower part, and an ultrasonic generator is equipped with an ultrasonic generator at the upper left front side of the filter body. The ultrasonic generator is electrically connected to the ultrasonic transducer.

[0011] More preferably, the automatic switching assembly includes a sliding frame, a float plate, a rack, a valve body, a valve ball, a gear, and a torsion spring. The sliding frame is slidably connected to both sides of the front of the filter body. The sliding frame is equipped with a float plate. The sliding frame is equipped with a rack at the front of the filter body. The valve body is equipped with a valve body at the front of the inlet pipe. The valve body is equipped with a valve ball. A gear is connected to one side of the valve ball through the valve body. The gear meshes with the rack. A torsion spring connects the gear and the valve body.

[0012] The present invention has the following advantages: 1. By setting up an automatic switch assembly and a liquid level linkage mechanism, the present invention utilizes the float plate to drive the rack and gear to drive the valve ball to close the water inlet pipe as the liquid level in the water inlet channel rises, thereby achieving automatic water cut-off and achieving the effect of automatically triggering backwash control according to the change of filtration resistance, thus improving the automation level and response reliability of the system operation.

[0013] 2. This utility model, by setting a sliding frame, a fixed sleeve and a spring structure in the filter assembly, and combining the thrust generated by the change of water flow direction during backwashing, causes the sliding frame to drive the filter layer to move downward to expand the rinsing space, thereby achieving the effect of enhancing the uniformity of backwash water flow and rinsing efficiency, and effectively preventing filter layer caking and local blockage.

[0014] 3. This utility model, by configuring an ultrasonic transducer and an ultrasonic generator, applies ultrasonic vibration to assist cleaning during the backwashing process. Combined with mechanical backwashing and acoustic cavitation, it achieves the effect of efficiently removing stubborn dirt from the surface of the filter layer and the micropores, significantly improving the self-cleaning ability and long-term operational stability of the filter. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the filter body, inlet pipe, and inlet channel of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the backwash siphon pipe, backwash drainage branch pipe, and water pump of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the fixed sleeve, sliding frame, and filter layer.

[0019] Figure 5 This is a three-dimensional structural diagram of the sliding frame, filter layer, and spring components of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the sliding frame and ultrasonic transducer of this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the filter body, sliding frame, and float plate of this utility model.

[0022] Figure 8 for Figure 7 A magnified structural diagram of point A in the middle.

[0023] The components in the attached diagram are labeled as follows: 1_Filter body, 101_Inlet pipe, 2_Inlet channel, 3_Unit inlet tank, 4_Backwash drain channel, 5_Backwash wastewater collection channel, 6_Fixed sleeve, 7_Sliding frame, 8_Filter layer, 9_Spring, 10_Clear water chamber, 11_Outlet hole, 12_Clear water collection channel, 13_Clear water supply pipe, 14_Inlet siphon pipe, 15_Backwash siphon pipe, 1501_Backwash drain branch pipe, 1502_Water pump, 16_Ultrasonic transducer, 17_Ultrasonic generator, 18_Sliding frame, 19_Float plate, 20_Rack and pinion, 21_Valve body, 22_Valve ball, 23_Gear, 24_Torsion spring. Detailed Implementation

[0024] Example: A U-shaped siphon filter with automatic backwashing function, such as Figures 1-4 and Figure 7 As shown, the system includes a filter body 1, a clear water collection channel 12, an inlet channel 2, an inlet pipe 101, a backwash wastewater collection channel 5, a siphon assembly, and an automatic switch assembly. The internal structure of the filter body 1 is symmetrical. The clear water collection channel 12 is located in the middle of the filter body 1. A set of partition plates is provided between the filter body 1 and the clear water collection channel 12 on both the left and right sides. Multiple partition plates are arranged at horizontal intervals on each side, forming a filtration unit between adjacent partition plates. The inlet channel 2 is connected to the upper part of each partition plate. The inlet pipe 101 is connected to the inside of the filter body 1 and the front side of the inlet channel 2. The two inlet pipes 101 are arranged symmetrically, and the two inlet channels 2 are interconnected. A unit inlet trough 3 is located below the side furthest from the main body. The unit inlet trough 3 has an arc-shaped structure below it. A backwash wastewater collection channel 5 is provided between the adjacent partitions of each group. The backwash wastewater collection channel 5 also has an arc-shaped structure below it. The backwash wastewater collection channel 5 is located below the unit inlet trough 3. The two are arranged vertically in a staggered manner. A backwash drainage trough 4 is provided on the side of each backwash wastewater collection channel 5 furthest from the clean water collection channel 12. Filter components are provided between the lower parts of each partition. A siphon component is provided between the inlet channel 2 and each unit inlet trough 3 and backwash wastewater collection channel 5. Two sets of automatic switch components are provided between the front side of the filter body 1 and its interior.

[0025] like Figures 1-7As shown, the filter assembly includes a fixed sleeve 6, a sliding frame 7, a filter layer 8, a spring 9, a clear water chamber 10, and a clear water supply pipe 13. Each partition plate has a side wall close to each other located below the backwash wastewater collection channel 5, and a fixed sleeve 6 is symmetrically fixedly connected to it. A sliding frame 7 is slidably connected inside every four fixed sleeves 6. The sliding frame 7 is located between the partition plate and the backwash wastewater collection channel 5. A filter layer 8 is provided on the inner side of the top of the sliding frame 7. A spring 9 is connected between the sliding frame 7 and the fixed sleeve 6. The clear water chamber 10 is formed between the lower part of each backwash wastewater collection channel 5 and the clear water collection channel 12. A water outlet 11 is opened at the bottom of the clear water collection channel 12 corresponding to each partition plate. The upper part of the filter body 1 is located in front of the clear water collection channel 12 and is connected to the clear water supply pipe 13.

[0026] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the siphon assembly includes an inlet siphon pipe 14, a backwash siphon pipe 15, a backwash drainage branch pipe 1501, a water pump 1502, an ultrasonic transducer 16, and an ultrasonic generator 17. An inlet siphon pipe 14 is provided between the inlet channel 2 and the unit inlet tank 3 corresponding to each set of partition plates. The backwash siphon pipe 15 connects the clear water chamber 10 and the backwash wastewater collection channel 5. During backwashing, clear water flows from the clear water chamber 10 into the backwash wastewater collection channel 5 through the backwash siphon pipe 15, and backwashes the filter layer in the reverse direction. The bottom of each set of backwash siphon pipes 15 near the clear water chamber 10 is connected to and connected to the backwash drainage branch pipe 1501. A water pump 1502 is provided in front of the backwash drainage branch pipe 1501. An ultrasonic transducer 16 is provided at the bottom of each sliding frame 7. An ultrasonic generator 17 is provided at the upper left front of the filter body 1. The ultrasonic generator 17 is electrically connected to the ultrasonic transducer 16.

[0027] like Figure 7 and Figure 8 As shown, the automatic switching assembly includes a sliding frame 18, a float 19, a rack 20, a valve body 21, a valve ball 22, a gear 23, and a torsion spring 24. The sliding frame 18 is slidably connected to both sides of the front of the filter body 1. The float 19 is provided on the sliding frame 18. The rack 20 is provided at the position of the sliding frame 18 at the front of the filter body 1. The valve body 21 is provided at the front of the water inlet pipe 101. The valve ball 22 is provided inside the valve body 21. The gear 23 is connected through the valve body 21 on one side of the valve ball 22. The gear 23 meshes with the rack 20. The torsion spring 24 is connected between the gear 23 and the valve body 21. The float 19 moves with the rise and fall of the liquid level, which drives the sliding frame 18 to move. In turn, the rack 20 drives the gear 23 to rotate, so that the valve ball 22 opens and closes the water inlet channel.

[0028] Operators can apply the corresponding technical solutions in this device to the water treatment filtration system according to specific circumstances. When it is necessary to use this device to assist in automatic filtration and backwashing operations, firstly, the raw water is introduced into the inlet channel 2 through the inlet pipes 101 on both sides. The raw water flows through the inlet siphon pipe 14 into the unit inlet tank 3 and passes through the filter assembly set between the partition plates from top to bottom. The filter layer 8 intercepts suspended solids in the water. The filtered clean water flows into the clean water collection channel 12 through the outlet hole 11 and is discharged through the clean water delivery pipe 13 to achieve continuous filtration operation.

[0029] As the filtration operation time increases, the filter layer 8 gradually traps impurities, leading to increased resistance and a rise in the liquid level in the inlet channel 2. When the liquid level reaches the preset height, the float 19 rises with the liquid level, causing the sliding frame 18 and the rack 20 fixed on it to rise synchronously. The rack 20 drives the gear 23 meshing with it to rotate, and the gear 23 drives the valve ball 22 to rotate, thereby closing the water inlet channel of the inlet pipe 101 and stopping the water intake. The torsion spring 24 is initially in a pre-tightened state. When the rack 20 moves downward, the restoring force of the torsion spring 24 assists the gear 23 to rotate in the opposite direction, ensuring that the valve ball 22 accurately opens the inlet pipe 101.

[0030] After the water intake stops, the water pump 1502 is started. The water pump 1502 draws clean water from the clean water chamber 10 through the backwash drain branch pipe 1501, creating a negative pressure in the backwash siphon pipe 15 and triggering the backwash siphon effect. The clean water enters the backwash wastewater collection channel 5 from the clean water chamber 10 through the backwash siphon pipe 15 and flushes the filter layer 8 in reverse upwards, removing the attached dirt.

[0031] When the backwash water flows upward to flush the filter layer, it generates a downward reaction force on the sliding frame 7, pushing the sliding frame 7 to overcome the elastic force of the spring 9 and move downward, expanding the flushing channel space and improving the flushing uniformity. At the same time, the ultrasonic generator 17 supplies power to the ultrasonic transducer 16, and the transducer generates high-frequency vibration, which helps to remove the scale on the surface and inside of the filter layer 8 and enhances the cleaning effect.

[0032] The wastewater generated by backwashing, carrying impurities, is collected in the backwash wastewater collection channel 5 and discharged from the system through the backwash drainage tank 4. After backwashing has continued for a certain period of time, the water pump 1502 is turned off, the siphon is broken, the system stops draining, the clear water chamber 10 is refilled with water, the water level in the inlet channel 2 drops, the float 19 falls back down, driving the rack 20 to move downward, the gear 23 rotates in the opposite direction, and under the reset action of the torsion spring 24, the valve ball 22 reopens the water inlet channel, resumes water intake, and enters the next filtration cycle.

[0033] Through the above process, this device achieves automatic filtration and automatic backwashing circulation without manual intervention, and is suitable for water treatment scenarios that require continuous and stable operation.

Claims

1. A U-shaped siphon filter tank with automatic backwashing function, characterized in that, The filter body (1) includes a clear water collection channel (12), an inlet channel (2), an inlet pipe (101), a backwash wastewater collection channel (5), a siphon assembly, and an automatic switch assembly. The internal structure of the filter body (1) is symmetrical. The clear water collection channel (12) is located in the middle of the filter body (1). A set of partition plates is provided between the left and right sides of the filter body (1) and the clear water collection channel (12). Multiple partition plates are arranged horizontally on each side. The inlet channel (2) is connected to the upper part of each partition plate. The inlet pipe (101) is connected to the inside of the filter body (1) and the front side of the inlet channel (2). The two inlet pipes (101) are arranged symmetrically. The two inlet channels (2) are located on opposite sides. The unit is provided with a water inlet trough (3), and the bottom of the unit water inlet trough (3) is arc-shaped. Each group of adjacent partition plates is provided with a backwash wastewater collection channel (5). The bottom of the backwash wastewater collection channel (5) is also arc-shaped. The backwash wastewater collection channel (5) is located below the unit water inlet trough (3). The two are arranged vertically in a staggered manner. Each group of backwash wastewater collection channels (5) is provided with a backwash drainage trough (4) on the side away from the clear water collection channel (12). Each group of partition plates is provided with a filter assembly. The water inlet channel (2) is provided with a siphon assembly between each group of unit water inlet troughs (3) and backwash wastewater collection channels (5). The front side of the filter body (1) and its interior are provided with two sets of automatic switch assemblies.

2. A U-shaped siphon filter with automatic backwashing function according to claim 1, characterized in that, The filter assembly includes a fixed sleeve (6), a sliding frame (7), a filter layer (8), and a spring (9). The side wall of each partition plate is located below the backwash wastewater collection channel (5) and is symmetrically fixedly connected with a fixed sleeve (6). The sliding frame (7) is slidably connected inside every four fixed sleeves (6). The sliding frame (7) is located between the partition plate and the backwash wastewater collection channel (5). The filter layer (8) is provided on the inner side of the top of the sliding frame (7). A spring (9) is connected between the sliding frame (7) and the fixed sleeve (6).

3. A U-shaped siphon filter with automatic backwashing function according to claim 2, characterized in that, It also includes a clear water chamber (10) and a clear water supply pipe (13). The clear water chamber (10) is formed between the lower part of each set of backwash wastewater collection channel (5) and clear water collection channel (12). Water outlet (11) is opened at the bottom of the clear water collection channel (12) corresponding to each set of partition plates. The upper part of the filter body (1) is located in front of the clear water collection channel (12) and is connected to the clear water supply pipe (13).

4. A U-shaped siphon filter with automatic backwashing function according to claim 3, characterized in that, The siphon assembly includes an inlet siphon pipe (14), a backwash siphon pipe (15), a backwash drain branch pipe (1501), and a water pump (1502). Each set of partition plates has an inlet siphon pipe (14) between the inlet channel (2) and the unit inlet tank (3). The backwash siphon pipe (15) connects the clear water chamber (10) and the backwash wastewater collection channel (5). The bottom of each set of backwash siphon pipe (15) near the clear water chamber (10) is connected to and connected to the backwash drain branch pipe (1501). A water pump (1502) is provided in front of the backwash drain branch pipe (1501).

5. A U-shaped siphon filter with automatic backwashing function according to claim 4, characterized in that, It also includes an ultrasonic transducer (16) and an ultrasonic generator (17). Each sliding frame (7) has an ultrasonic transducer (16) at its lower part, and an ultrasonic generator (17) is provided on the upper left side of the front side of the filter body (1). The ultrasonic generator (17) is electrically connected to the ultrasonic transducer (16).

6. A U-shaped siphon filter with automatic backwashing function according to claim 5, characterized in that, The automatic switch assembly includes a sliding frame (18), a float (19), a rack (20), a valve body (21), a valve ball (22), a gear (23), and a torsion spring (24). The sliding frame (18) is slidably connected to both sides of the front of the filter body (1). The float (19) is provided on the sliding frame (18). The rack (20) is provided at the position of the sliding frame (18) at the front of the filter body (1). The valve body (21) is provided at the front of the water inlet pipe (101). The valve ball (22) is provided inside the valve body (21). The gear (23) is connected through the valve body (21) on one side of the valve ball (22). The gear (23) meshes with the rack (20). The torsion spring (24) is connected between the gear (23) and the valve body (21).

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