Filter backwashing device with automatic compensation function

Abstract

The utility model belongs to the field of filter tank backflushing, and discloses a filter tank backflushing device with an automatic compensation function, which comprises a filter assembly for introducing sewage for filtering and backflushing drainage, and a flushing assembly which is arranged at the bottom of the filter assembly, is used for backflushing and can rotatably control the flushing flow, a lifting assembly used for adjusting the overflow height in a lifting mode for compensation is arranged on one side of the top of the filtering assembly. According to the filter tank backwashing device with the automatic compensation function, disclosed by the utility model, the washing flow is reduced and the washing intensity is compensated and adjusted along with the proceeding of washing and the reduction of the blockage degree in a filter material through the arrangement of rotatably controlling the washing flow, so that a water source is saved; through the arrangement of lifting adjustment of the overflow height, along with the reduction of the expansion degree of the filter material, the overflow height is subjected to compensation adjustment, so that the flushed dirt close to the surface of the filter material layer can smoothly overflow and be discharged, the back-flushed dirt is discharged more thoroughly, and the back-flushing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter backflushing field, in particular, relate to a filter backflushing device with automatic compensation function. BACKGROUND

[0002] The filter of the waterworks will accumulate a large amount of dirt and large particle impurities on the surface after being used for a period of time, thereby causing the filter screen to be blocked, which will lead to poor sewage treatment effect of the filter in the long run, and the impurities between the filter materials are usually removed by backwashing; backwashing is an operation process of washing the filter material layer by reverse water flow for restoring normal operation of the filter, during backwashing, water flows through the bottom drainage system to pass through the filter in reverse, so as to wash away the blocking substances in the filter material; under the double effects of water flow shearing force and collision and friction between filter material particles, the impurities trapped in the filter material layer are stripped from the surface of the filter material, and then are taken out of the filter by the washing water.

[0003] The Chinese patent with the authorized publication number CN220078788U discloses a denitrification filter backwashing device, which comprises a treatment pool, a water supply pump, a liquid inlet pipe and a gas washing assembly; the treatment pool is communicated with the water supply pump through the liquid inlet pipe; the gas washing assembly comprises an air inlet pipe, a jet head, a first electronic valve, a second electronic valve and a gas compression device; the air inlet pipe is inserted into the treatment pool below the filter material from outside the treatment pool; the first electronic valve and the second electronic valve are installed on the part of the air inlet pipe extending outside the treatment pool; the gas compression device comprises a gas compression cylinder, a gas compression piston, a water push piston, a linkage rod and a back push spring; the gas compression cylinder is vertically arranged; the gas compression cylinder is communicated with the air inlet pipe and the liquid inlet pipe at both ends respectively; the gas compression piston is arranged in the gas compression cylinder; the water push piston is arranged in the liquid inlet pipe; the gas compression piston and the water push piston are connected through the linkage rod.

[0004] During backwashing, the blocking degree in the filter material will gradually decrease, and the washing strength remains unchanged, which will cause water source waste. UTILITY MODEL CONTENT

[0005] The utility model discloses a filter backflushing device with automatic compensation function, which solves the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A filter backflushing device with automatic compensation function, comprising a filter assembly for introducing sewage filtration and backwashing drainage, and a washing assembly arranged at the bottom of the filter assembly for backwashing and rotatable control of washing flow; a lifting assembly is arranged on one side of the top of the filter assembly for lifting adjustment of overflow height for compensation.

[0008] The flushing assembly comprises a water distribution structure, a flow valve is arranged at the inlet of the water distribution structure, and a control structure is arranged on the flow valve;

[0009] The lifting assembly comprises a support plate, a crane is arranged at the middle position of the support plate, a lifting plate is arranged at the bottom of the crane, and two limiting rods are symmetrically arranged on the lifting plate.

[0010] Further, the filter assembly comprises a filter tank, a supporting net is arranged in the filter tank, a filter material layer is arranged on the supporting net, an overflow gate is slidably arranged on one side of the filter tank, a water inlet structure is arranged on the side, away from the filter tank, of the overflow gate, and a clean water pipe is arranged below the water inlet structure.

[0011] Further, the water distribution structure comprises a water inlet pipe, six shunt pipes are uniformly arranged at the back of the water inlet pipe, and ten spray heads are uniformly arranged on the shunt pipes.

[0012] Further, the control structure comprises a transmission wheel, a driving wheel is arranged in front of the transmission wheel, a synchronous belt is arranged between the driving wheel and the transmission wheel, and a motor is arranged below the driving wheel.

[0013] Further, the lifting plate is bolted with the overflow gate.

[0014] Further, the water inlet structure comprises a sewage weir, a sewage inlet pipe is arranged at the top of the rear end of the sewage weir, and a sewage discharge pipe is arranged below the sewage inlet pipe.

[0015] Compared with the prior art, the beneficial effects are:

[0016] 1. By rotating to control the setting of the flushing flow, the flushing flow is reduced as the flushing proceeds and the degree of blockage in the filter material decreases, the flushing intensity is compensated and adjusted, and the water source is saved.

[0017] 2. By adjusting the overflow height through lifting, the overflow height is compensated and adjusted as the degree of expansion of the filter material decreases, so that the sewage flushed out near the surface of the filter material layer can be smoothly overflowed and discharged, the discharge of the backwash sewage is more thorough, and the effect of backwashing is improved.

[0018] 3. By adjusting the overflow height through lifting, it is ensured that the top of the overflow gate is always higher than the filter material layer, so that the filter material is prevented from being discharged during the flushing process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the filter tank backwashing device with automatic compensation function.

[0020] Figure 2It is the filter assembly schematic view of the filter tank backwashing device with automatic compensation function;

[0021] Figure 3 It is the washing assembly schematic view of the filter tank backwashing device with automatic compensation function;

[0022] Figure 4 It is the lifting assembly schematic view of the filter tank backwashing device with automatic compensation function.

[0023] In the drawing mark: 101, filter tank; 102, support net; 103, filter material layer; 104, overflow gate; 105, sewage weir; 106, sewage inlet pipe; 107, sewage outlet pipe; 108, clean water pipe; 201, water inlet pipe; 202, shunt pipe; 203, nozzle; 204, flow valve; 205, transmission wheel; 206, driving wheel; 207, synchronous belt; 208, motor; 301, support plate; 302, crane; 303, lifting plate; 304, limit rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] Please refer to Figures 1-4 A filter tank backwashing device with automatic compensation function, comprising a filter assembly for introducing sewage filtration and backwashing drainage, further comprising a washing assembly arranged at the bottom of the filter assembly for backwashing and rotatable control of washing flow, and a lifting assembly arranged at one side of the top of the filter assembly for lifting and adjusting overflow height for compensation.

[0026] In the embodiment, the filter assembly comprises a filter tank 101, the filter tank 101 is provided with a support net 102, the support net 102 is provided with a filter material layer 103, the filter tank 101 is provided with an overflow gate 104 on one side, the overflow gate 104 is provided with a water inlet structure on the side away from the filter tank 101, the water inlet structure is provided with a clean water pipe 108 below, the water inlet structure comprises a sewage weir 105, the sewage weir 105 is provided with a sewage inlet pipe 106 at the top of the rear end, the sewage inlet pipe 106 is provided with a sewage outlet pipe 107 below, during filtration, sewage enters the sewage weir 105 through the sewage inlet pipe 106, and then overflows into the filter tank 101 through the overflow gate 104, after filtration by the filter material layer 103 on the support net 102, clean water is discharged through the clean water pipe 108 at the bottom of the filter tank 101, and sewage accumulates on the filter material layer 103;

[0027] In this embodiment: the flushing assembly includes a water distribution structure. A flow valve 204 is installed at the inlet of the water distribution structure, and a control structure is installed on the flow valve 204. The water distribution structure includes an inlet pipe 201, and six branch pipes 202 are evenly arranged behind the inlet pipe 201. Ten nozzles 203 are evenly arranged on the branch pipes 202. The control structure includes a drive wheel 205, and a drive wheel 206 is arranged in front of the drive wheel 205. A synchronous belt 207 is installed between the drive wheel 206 and the drive wheel 205. A motor 208 is installed below the drive wheel 206. When the filter layer 103 is severely clogged and backflushing is required, the sewage inlet pipe 106 and the clean water pipe 108 are closed, and the sewage outlet pipe 107 is opened at the same time. The system pumps clean water into the inlet pipe 201, which is then sprayed out through the nozzles 203 on the diversion pipe 202 to backwash the filter media layer 103. This backwashes the dirt in the filter media layer 103 upwards and backflows into the sewage weir 105 through the overflow gate 104, and is discharged from the sewage pipe 107. As the backwashing progresses, the amount of dirt in the filter media layer 103 decreases, and the required rinsing intensity also decreases. At this time, the motor 208 drives the drive wheel 206 to rotate the transmission wheel 205 through the synchronous belt 207, which adjusts the flow valve 204 to gradually reduce the flow rate of clean water in the inlet pipe 201, thereby reducing the rinsing intensity and automatically compensating to save water.

[0028] In this embodiment, the lifting assembly includes a support plate 301, a crane 302 is installed in the middle of the support plate 301, a lifting plate 303 is provided at the bottom of the crane 302, and two limiting rods 304 are symmetrically arranged on the lifting plate 303. The lifting plate 303 is bolted to the overflow gate 104. During the flushing process, the water flow causes the filter layer 103 to expand and suspend. As the flushing intensity decreases, the expansion of the filter layer 103 will weaken. Therefore, the support plate 301 supports the crane 302, which drives the overflow gate 104 to move downward along the limiting rods 304 through the lifting plate 303, thereby reducing the overflow height and compensating for the overflow height. This allows the top of the overflow gate 104 to approach the surface of the expanded filter layer 103 and match the expanded filter layer 103, so that the dirt washed out near the surface of the filter layer 103 can overflow and be discharged smoothly.

[0029] Working principle: During filtration, wastewater enters the wastewater weir 105 through the inlet pipe 106 and overflows into the filter tank 101 through the overflow gate 104. After being filtered by the filter media layer 103 on the support net 102, clean water is discharged through the clean water pipe 108 at the bottom of the filter tank 101, while dirt accumulates on the filter media layer 103. When the filter media layer 103 is severely clogged and backwashing is required, the inlet pipe 106 and the clean water pipe 108 are closed, while the outlet pipe 107 is opened, and clean water is pumped into the inlet pipe 201. The clean water is then sprayed out through the nozzles 203 on the diversion pipe 202 to backwash the filter media layer 103, flushing the dirt out of the filter media layer 103 and backflowing it into the wastewater weir 105 through the overflow gate 104, and then discharged through the outlet pipe 107. As backwashing proceeds, the amount of dirt in the filter media layer 103 decreases, and the required flushing intensity decreases. The flow rate will also decrease. At this time, the motor 208 drives the drive wheel 206 to rotate the transmission wheel 205 through the synchronous belt 207, which adjusts the flow valve 204 to gradually reduce the flow rate, thereby reducing the flow rate of clean water in the inlet pipe 201, thus reducing the flushing intensity and automatically compensating to save water. At the same time, during the flushing process, the water flow causes the filter layer 103 to expand and suspend. As the flushing intensity decreases, the expansion of the filter layer 103 will weaken. Therefore, the support plate 301 supports the crane 302, which drives the overflow gate 104 to move downward along the limit rod 304 through the lifting plate 303, reducing the overflow height and compensating for the overflow height. This makes the top of the overflow gate 104 close to the surface of the expanded filter layer 103 and match the expanded filter layer 103, so that the dirt washed out near the surface of the filter layer 103 can overflow and be discharged smoothly.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter backwashing device with automatic compensation function, comprising a filter assembly for introducing wastewater for filtration and backwash drainage, characterized in that: It also includes a flushing component at the bottom of the filter assembly for backwashing and rotatable control of the flushing flow rate, and a lifting component on one side of the top of the filter assembly for adjusting the overflow height for compensation. The flushing assembly includes a water distribution structure, and a flow valve (204) is provided at the inlet of the water distribution structure. A control structure is installed on the flow valve (204). The lifting assembly includes a support plate (301), a crane (302) is installed in the middle of the support plate (301), a lifting plate (303) is provided at the bottom of the crane (302), and two limiting rods (304) are symmetrically arranged on the lifting plate (303).

2. The filter backwashing device with automatic compensation function according to claim 1, characterized in that: The filtration assembly includes a filter tank (101), a support net (102) is provided inside the filter tank (101), a filter media layer (103) is provided on the support net (102), an overflow gate (104) is slidably installed on one side of the filter tank (101), a water inlet structure is provided on the side of the overflow gate (104) away from the filter tank (101), and a clear water pipe (108) is provided below the water inlet structure.

3. The filter backwashing device with automatic compensation function according to claim 1, characterized in that: The water distribution structure includes an inlet pipe (201), six branch pipes (202) are evenly arranged behind the inlet pipe (201), and ten nozzles (203) are evenly arranged on the branch pipes (202).

4. A filter backwashing device with automatic compensation function according to claim 1, characterized in that: The control structure includes a transmission wheel (205), a drive wheel (206) is provided in front of the transmission wheel (205), a synchronous belt (207) is installed between the drive wheel (206) and the transmission wheel (205), and a motor (208) is installed below the drive wheel (206).

5. A filter backwashing device with automatic compensation function according to claim 2, characterized in that: The lifting plate (303) is bolted to the overflow gate (104).

6. A filter backwashing device with automatic compensation function according to claim 2, characterized in that: The water inlet structure includes a sewage weir (105), a sewage inlet pipe (106) is provided at the top of the rear end of the sewage weir (105), and a sewage outlet pipe (107) is provided below the sewage inlet pipe (106).

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