CN209596701U - A pre-pump self-cleaning filter device - Google Patents

Abstract

The utility model discloses a self-cleaning filter device in front of a water pump, which comprises structures such as a floating plate above water, a deceleration motor, an underwater cylindrical coarse filter, a cylindrical fine filter, a cleaning brush, and a transmission shaft. The deceleration motor is fixed by a bracket. On the floating plate, the hollow shaft is connected to the geared motor through the flywheel welded on the surface. The coarse filter and the fine filter are fixed on the floating plate with universal bolts in the form of flanges. The interior of the device is divided into a primary filter cavity, a secondary filter cavity, The water outlet cavity completes the secondary filtration of raw water. The hollow shaft is connected by segmented assembly, and the end is evenly equipped with water spray holes, which can wash away the impurities on the surface of the coarse filter, and the impurities trapped inside the fine filter are washed by the cleaning brush and the sewage pump. The utility model has the advantages of simple structure, convenient maintenance, adopts on-site assembly mode, selects the number of filter screens according to the requirement of irrigation water volume, can complete filter screen cleaning under the condition of continuous water, and ensures continuous operation of the irrigation system.

Description

A pre-pump self-cleaning filter device

technical field

The utility model belongs to the technical field of pre-pump filter devices in the farmland water conservancy industry, and in particular relates to a pre-pump self-cleaning filter device.

Background technique

With the popularization and application of high-efficiency water-saving irrigation technology in irrigation areas in my country, crop yield and irrigation water utilization rate have been greatly improved. The role of the filtration system in the irrigation project is very important. It can ensure the safe and reliable operation of the irrigation project by filtering the impurities in the water. At present, the most widely used post-pump filters include gravel filters, screen filters, laminated filters, etc. After the water flow is pressurized by the water pump, the water purification is completed in the filter. The filter needs sufficient pressure resistance. Manufacture The cost will also increase. The filter after the water pump will increase the water head loss of the irrigation system, and put forward higher requirements for the head of the water pump, which will increase the operating cost of the irrigation system.

For example, the patent with the authorized announcement number CN105582724B discloses a self-cleaning pump pre-filter system. The system consists of a floating boat structure and an underwater filtering structure. After the water passes through the underwater secondary filter, it is installed in the floating boat. Water pumps input water into the irrigation system. With the continuous accumulation of impurities on the surface of the filter screen, the water passing capacity gradually decreases. Start the deceleration motor to rotate the rotating shaft, clean the impurities on the surface of the filter screen through the brush, and then discharge the impurities through the sewage suction pump. Disadvantages: Due to the closed structure of the pontoon, factors such as rainfall or equipment leakage will cause water to accumulate inside the pontoon, which is not easy to clean. The filter screen includes coarse filtration and fine filtration. The present invention only considers the sewage cleaning of the fine filtration, and does not consider the sewage discharge of the coarse filtration. The accumulation of impurities will still affect its operation. The analysis shows that the filtration capacity of the coarse filter and the fine filter does not match, and further optimization and matching of the filter cross-section is required.

Contents of the invention

The technical problem solved by the utility model is to provide a self-cleaning filter device in front of the water pump with simple structure and reasonable design, which is used to solve the self-cleaning problem of the secondary filter screen of the filter device, and realize the completion of the filter screen under the condition of uninterrupted water supply. Cleaning, to continuously and stably provide safe water for irrigation projects.

In order to solve the above technical problems, the utility model adopts the following technical scheme, a self-cleaning filter device in front of the water pump, which is characterized in that it includes a floating plate, a decelerating motor fixed on the floating plate through a bracket, and a hollow drive connected to the decelerating motor through a flywheel. The shaft and the cylindrical coarse filter screen, cylindrical partition plate and cylindrical fine filter screen arranged in the lower part of the floating plate and distributed sequentially from the outside to the inside, the bottom of the cylindrical coarse filter screen is connected to the blind plate or the cylinder in another group of filter units The first-stage filter cavity is formed between the cylindrical partition and the cylindrical coarse filter, and the second-stage filter cavity is formed inside the cylindrical fine filter. The first-stage filter cavity and the second-stage filter cavity pass through the bottom plate of the cylindrical partition The through hole on the top is connected, and the water outlet cavity is formed between the cylindrical partition and the cylindrical fine filter. The secondary filter cavity is equipped with a sewage pipe, and the water outlet cavity is equipped with a water outlet pipe. The pipe is connected to the shore water pump, the hollow shaft on the upper part of the geared motor is connected to the cleaning port through a seal, the hollow shaft on the lower part of the geared motor runs through the middle of the floating plate and extends to the bottom of the cylindrical coarse filter, and the bottom of the hollow shaft is fixed by a sleeve On the bottom plate of the cylindrical partition, the hollow shaft is provided with a cleaning brush for cleaning the cylindrical fine filter. The water pipe is provided with water spray holes which are axially distributed and whose opening direction is opposite to the cylindrical coarse strainer.

Further preferably, both the cylindrical coarse filter and the cylindrical fine filter are 301 stainless steel sintered mesh or wedge-shaped mesh, and the material of the hollow shaft is 301 stainless steel. Further preferably, the floating board is a new type of nano material, light in weight and high in buoyancy, convenient for transportation and on-site assembly, and has a long service life against ultraviolet radiation.

Further preferably, the bottom of the cylindrical coarse filter screen is connected to the cylindrical coarse filter screen in another group of filter units through flanges and bolts, so as to realize the combined use of at least two sets of filter devices.

Further preferably, the sealing member is used to realize the rotation of the lower hollow shaft while the upper cleaning port does not rotate, so as to ensure smooth water delivery and no water leakage.

Further preferably, the cleaning brush is fixed on the hollow shaft through a clamp and a jacking wire, and there are at least two cleaning brushes distributed up and down.

Further preferably, the water outlet, the cleaning port, and the sewage outlet all use quick connectors for fire protection, which can realize the rapid installation and disassembly of the filtering device and the shore water pump.

The operating method of the self-cleaning filter device at the front of the water pump described in the utility model is characterized in that the specific process is as follows: firstly, the self-cleaning filter device at the front of the water pump is placed in the raw water to be filtered, and the water flows through the cylindrical coarse filter under the action of gravity. Filter screen, impurities larger than the pore size of the cylindrical coarse filter are trapped on the outer surface of the cylindrical coarse filter, and the impurities at this stage are mainly plankton, organic matter, inorganic matter and sediment, and the raw water filtered by the cylindrical coarse filter enters In the first-stage filter chamber, the water enters the water outlet chamber after being filtered through the cylindrical fine filter, and the impurities are mainly trapped on the inner surface of the cylindrical fine filter. At this stage, the impurities are mainly small-sized sediment, solid particles and microorganisms. The raw water filtered by the coarse filter and the cylindrical fine filter enters the water outlet chamber, and the outlet pipe is connected to the shore water pump through the fire-fighting quick connector and the hose. The amount of impurities retained by the cylindrical coarse filter and the cylindrical fine filter continues to increase, and the water output of the water pump gradually decreases. When it is lower than the set value, the controller starts the deceleration motor, the hollow shaft starts to rotate and drives the cleaning brush, and the cylindrical fine filter Impurities trapped on the inner surface of the screen fall off under the action of the cleaning brush, and are discharged through the sewage pump after passing through the sewage pipe. The deceleration motor is started and the cleaning valve is opened at the same time, and the water flows through the hollow shaft to the water spray hole at the end. Washing of impurities trapped on the surface, cleaning of cylindrical coarse filter and cylindrical fine filter is realized under the condition of uninterrupted water supply, which can effectively ensure the continuous and stable operation of the irrigation system.

Compared with the prior art, the utility model has the following beneficial effects: the utility model can be flexibly assembled according to the water output requirements of the irrigation system, complete the assembly of filter screens with different flow gradations, and provide the irrigation system with up to standard water quality through secondary filtration. The cleaning of the filter screen is completed under the condition of uninterrupted water supply, which reduces the loss of water head, reduces energy consumption, and effectively avoids the waste of resources.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the utility model;

Fig. 2 is a schematic diagram of the external structure of the utility model;

Fig. 3 is the structural representation of the utility model hollow shaft;

Fig. 4 is the structural representation of flywheel in Fig. 3;

Fig. 5 is a schematic diagram of the assembly structure of the hollow shaft of the present invention;

Fig. 6 is a schematic structural view of the junction in Fig. 5;

Fig. 7 is the structural representation of cleaning brush in the utility model;

Fig. 8 is a schematic structural view of the top wire and the clip in Fig. 7;

Fig. 9 is a schematic diagram of the filter screen assembly structure in the present invention.

In the figure: 1-cleaning port, 2-seal, 3-reduction motor, 4-floating plate, 5-sewage pipe, 6-outlet pipe, 7-hollow shaft, 8-cylindrical fine filter, 9-cleaning brush , 10-cylindrical coarse filter, 11-spray hole, 12-bracket, 13-bolt, 14-shaft sleeve, 15-top wire, 16-clamp, 17-flange, 18-thread mouth, 19- Flywheel, 20-fire quick connector, 21-through hole.

Detailed ways

The technical scheme of the utility model is described in detail in conjunction with the accompanying drawings, a self-cleaning filter device in front of the water pump, including a floating plate 4, a deceleration motor 3 fixed on the floating plate 4 through a bracket 12, and a decelerating motor 3 connected to the transmission through a flywheel 19 The hollow shaft 7 and the cylindrical coarse filter screen 10, the cylindrical partition plate and the cylindrical fine filter screen 8 arranged at the bottom of the floating plate 4 and distributed sequentially from the outside to the inside, the bottom of the cylindrical coarse filter screen 10 is connected to a blind plate or another Cylindrical coarse strainer in one group of filter units, a first-stage filter chamber is formed between the cylindrical partition and the cylindrical coarse strainer 10, and a second-stage filter chamber is formed inside the cylindrical fine strainer 8, and the first-stage filter chamber and the second The first-stage filter chamber is connected through the through hole 21 on the bottom plate of the cylindrical partition, and a water outlet chamber is formed between the cylindrical partition and the cylindrical fine filter screen 8. A sewage pipe 5 is arranged in the second-stage filter chamber, and an outlet pipe 5 is arranged in the water outlet chamber. The water pipe 6, the outlet pipe 6 is connected to the shore water pump through the fire-fighting quick connector 20 and the hose, the hollow shaft 7 on the upper part of the geared motor 3 is connected to the cleaning port 1 through the seal 2, and the hollow shaft 7 on the lower part of the geared motor 3 runs through the floating plate 4 and extends to the bottom of the cylindrical rough screen 10, the bottom of the hollow shaft 7 is fixed on the bottom plate of the cylindrical partition through the bushing 14, and the hollow shaft 7 is fixed with a top wire 15 and a hoop 16 for cleaning. The cleaning brush 9 of the cylindrical fine filter screen 8, the cleaning brush 9 is at least two dislocation distributions up and down, the end of the hollow shaft 7 is connected with the vertical water spray pipe arranged in the primary filter cavity through a horizontal connecting pipe, and the horizontal connection The two ends of the pipe are respectively connected with the hollow shaft 7 and the water spray pipe through the thread opening 18, and the water spray pipe is provided with water spray holes 11 which are axially distributed and whose opening direction is opposite to the cylindrical coarse filter screen 10.

The cylindrical coarse filter screen 10 and the cylindrical fine filter screen 8 of the utility model are all 301 stainless steel sintered nets or wedge-shaped nets, and the material of the hollow shaft 7 is 301 stainless steel; The flange 17 and the bolt 13 are connected to the cylindrical coarse filter screen in another group of filter units to realize the combined use of at least two groups of filter devices; the seal 2 is used to realize the rotation of the lower hollow shaft 7 while the upper cleaning port 1 does not rotate, Ensure smooth water delivery and no water leakage.

The specific operation process of the utility model is as follows: firstly, the front self-cleaning filter device of the water pump is placed in the raw water that needs to be filtered, and the water flow passes through the cylindrical coarse filter 10 under the action of gravity, and the impurities larger than the pore diameter of the cylindrical coarse filter 10 are removed. Trapped on the outer surface of the cylindrical coarse filter, the impurities at this stage are mainly plankton, organic matter, inorganic matter and sediment. The raw water filtered by the cylindrical coarse filter enters the primary filter cavity, and the water passes through the cylindrical fine filter 8 After filtering into the water outlet chamber, the impurities are mainly trapped on the inner surface of the cylindrical fine filter 8. At this stage, the impurities are mainly small-sized silt, solid particles and microorganisms. After passing through the cylindrical coarse filter 10 and the cylindrical fine filter 8 The filtered raw water enters the water outlet cavity, and the outlet pipe is connected to the shore water pump through the fire-fighting quick connector 20 and the hose. The amount of impurities intercepted by the cylindrical fine filter 8 increases continuously, and the water output of the water pump gradually decreases. After the water output is lower than the set value, the controller starts the reduction motor 3, and the hollow shaft 7 starts to rotate and drives the cleaning brush. Impurities fall off under the action of the cleaning brush, pass through the sewage pipe 5, and then are discharged by the sewage pump. The deceleration motor 3 is started and the cleaning valve is opened at the same time. The water flows through the hollow shaft 7 to the water spray hole 11 at the end, and the cylindrical coarse filter is completed under the action of high-speed water flow. 10 surface retains impurities and washes, and the cleaning of the cylindrical coarse filter 10 and the cylindrical fine filter 8 is realized under the condition of uninterrupted water supply, which can effectively ensure the continuous and stable operation of the irrigation system.

The basic principles, main features and advantages of the present utility model have been shown and described above. On the premise of not departing from the spirit and scope of the present utility model, the present utility model also has various changes and improvements, and these changes and improvements all fall into the claims. The scope of the utility model.

Claims (6)

1. A water pump front self-cleaning filter device is characterized in that it comprises a floating plate, a geared motor fixed on the floating plate by a bracket, a hollow shaft connected to the output shaft of the geared motor through a flywheel and a hollow shaft arranged at the bottom of the floating plate and composed of Cylindrical coarse filter, cylindrical clapboard and cylindrical fine filter distributed in sequence from outside to inside, the bottom of the cylindrical coarse filter is connected to the blind plate or the cylindrical coarse filter in another group of filter units, cylindrical clapboard The primary filter cavity is formed between the cylindrical coarse filter and the secondary filter cavity is formed inside the cylindrical fine filter. The primary filter cavity and the secondary filter cavity are connected through the through hole on the bottom plate of the cylindrical partition. A water outlet chamber is formed between the plate and the cylindrical fine filter. A sewage pipe is provided in the secondary filter chamber, and a water outlet pipe is provided in the water outlet chamber. The outlet pipe is connected to the shore water pump through a fire-fighting quick connector and a hose. The hollow shaft of the gear motor is connected with the cleaning port through a seal. The hollow shaft at the lower part of the geared motor runs through the middle of the floating plate and extends to the bottom of the cylindrical coarse filter. The bottom of the hollow shaft is fixed on the bottom plate of the cylindrical partition through a bushing. The hollow shaft is provided with a cleaning brush for cleaning the cylindrical fine filter. The end of the hollow shaft is connected to the vertical water spray pipe arranged in the primary filter chamber through a horizontal connecting pipe. The water spray pipe is provided with axially distributed and The water spray hole whose opening direction is opposite to the cylindrical coarse strainer. 2. The self-cleaning filter device at the front of the water pump according to claim 1, characterized in that: the cylindrical coarse filter and the cylindrical fine filter are both 301 stainless steel sintered mesh or wedge-shaped mesh, and the material of the hollow shaft is For 301 stainless steel. 3. The self-cleaning filter device in front of the water pump according to claim 1, characterized in that: the bottom of the cylindrical coarse filter is connected to the cylindrical coarse filter in another group of filter units through flanges and bolts to achieve at least Combination of two sets of filter devices. 4. The self-cleaning filter device at the front of the water pump according to claim 1, characterized in that: the sealing member is used to realize the rotation of the lower hollow shaft while the upper cleaning port does not rotate, so as to ensure smooth water delivery and no water leakage. 5. The self-cleaning filter device in front of the water pump according to claim 1, characterized in that: the cleaning brush is fixed on the hollow shaft through a clamp and a top wire, and there are at least two cleaning brushes distributed up and down. 6. The self-cleaning filter device in front of the water pump according to claim 1, characterized in that: the outlet pipe, the cleaning port, and the sewage pipe all use quick connectors for fire protection, which are used to realize the rapid installation of the filter device and the water pump on the shore with disassembly.