Multi-stage filter device for yellow river water with cyclone self-cleaning

Abstract

The application relates to the technical field of agricultural irrigation water treatment equipment, in particular to a cyclone self-flushing type multi-stage Yellow River water filtering device. The device comprises a cylindrical filtering tank, a tangential fixed water inlet pipe arranged on the upper end side wall of the filtering tank, a sand collecting hopper fixed at the lower end of the filtering tank, a sand discharger installed at the lower end of the sand collecting hopper, an upper cover installed at the upper end of the filtering tank, a fine filter screen installed between the upper cover and the filtering tank, a water outlet pipe formed on one side of the upper cover, and a cleaning mechanism fixed at the center of the upper cover and capable of rotating to clean the mesh holes on the lower surface of the fine filter screen. The device has the beneficial effects that the cyclone separation structure and the fine filter screen are combined in the same tank body, the cyclone section can remove most of the coarse particle silt, and the load of the rear filter screen is reduced; the fine filter screen effectively intercepts the residual fine particles, and the water quality is obviously improved; the water flow drives the turbine mechanism, the scraper drives the filter screen to realize continuous self-cleaning, the silt accumulation and blockage are avoided, and the frequency of manual cleaning and the maintenance intensity are reduced.

Description

Technical Field

[0001] This application relates to the field of agricultural irrigation water treatment equipment technology, and in particular to a vortex self-flushing multi-stage filtration device for Yellow River water. Background Technology

[0002] The Yellow River, a vital irrigation source in my country, has extremely high sediment content. When used directly in drip or sprinkler irrigation systems, the sediment easily clogs the filtration system. Currently common filtration equipment, such as disc or mesh filters, has significant drawbacks when treating high-sediment-content water: their filter pores are easily clogged by sediment, requiring frequent backwashing. This not only interrupts irrigation and wastes water resources but also necessitates dedicated personnel, significantly increasing system operation and maintenance costs. While hydrocyclones can effectively remove some large sediment particles as pretreatment, their separation effect on fine sediment particles (such as silt and clay) is poor, failing to meet the basic water quality requirements of drip irrigation systems. Therefore, there is a lack of a filtration device that can adapt to the high sediment content and complex particle composition of the Yellow River, achieving continuous filtration with strong self-cleaning capabilities. To address these issues, there is an urgent need to develop a new type of filtration equipment that integrates hydrocyclone pretreatment and precision filtration, and can automatically clean itself using the system's own hydraulic power. Utility Model Content

[0003] This application proposes a vortex self-washing multi-stage filtration device for Yellow River water in order to solve the above problems.

[0004] The technical solution of this application is implemented as follows:

[0005] A vortex self-flushing multi-stage filtration device for Yellow River water includes a cylindrical filter tank. A tangentially fixed inlet pipe is provided on the upper side wall of the filter tank. A sand collection hopper is fixed at the lower end of the filter tank. A sand discharge device is detachably connected to the lower end of the sand collection hopper. A top cover is detachably connected to the upper end of the filter tank. A fine filter screen is installed between the top cover and the filter tank. A water outlet pipe is formed on one side of the top cover. A rotatable cleaning mechanism for cleaning the mesh on the lower surface of the fine filter screen is fixed in the center of the top cover.

[0006] Furthermore, the cleaning mechanism includes a driven shaft rotatably mounted in the center of the upper cover. A drive mechanism is drivenly mounted on the upper end of the driven shaft. The drive mechanism can be a low-speed, high-torque motor. The lower end of the driven shaft passes through the fine filter and reaches below the fine filter. At least one support frame is mounted in a circular array at the lower end of the driven shaft, which is parallel to the lower surface of the fine filter. A scraper with its upper end in contact with the lower surface of the fine filter is detachably connected to the side wall of the support frame.

[0007] Furthermore, the scraper is made of nylon bristles or rubber sheet.

[0008] Furthermore, the drive mechanism includes a turbine rotatably disposed inside the water outlet pipe. The turbine is fixed at one end of the drive shaft. The drive shaft is rotatably mounted on the side wall of the water outlet pipe via a bearing seat and is perpendicular to the water outlet pipe. The drive shaft and the driven shaft are arranged parallel to each other. A drive wheel is mounted on the upper end of the drive shaft, and a driven wheel that is drively connected to the drive wheel is mounted on the upper end of the driven shaft.

[0009] Furthermore, the rotational speed of the drive shaft is not less than three times the rotational speed of the driven shaft.

[0010] By adopting the above technical solution, the beneficial effects of this application are as follows:

[0011] 1. By combining a cyclone separation structure with a precision filter screen in the same tank, multi-stage high-efficiency filtration of Yellow River cement and sand is achieved.

[0012] 2. The vortex section can remove most of the coarse particles of silt, reducing the load on the downstream filter screen; the fine filter screen effectively intercepts residual fine particles, significantly improving the quality of the effluent.

[0013] 3. The turbine mechanism is driven by the outflow of water, which drives the scraper to continuously self-clean the filter screen, avoiding the accumulation and clogging of mud and sand, and greatly reducing the frequency of manual cleaning and maintenance intensity.

[0014] 4. The system automatically discharges concentrated sediment at regular intervals via a sand discharger, enabling the system to complete the sand discharge operation without interrupting irrigation, thus improving the overall continuity and reliability of operation.

[0015] 5. The device has a compact structure, is suitable for water sources with high sediment content, and has good energy-saving effect and engineering applicability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is the main sectional view of this application;

[0018] Figure 2 This is a perspective view of this application;

[0019] Figure 3 This is the front view of this application;

[0020] Figure 4 This is a side view of this application;

[0021] Figure 5 This is a schematic diagram of the cleanup organization structure in this application;

[0022] Figure 6 This is a schematic diagram of the scraper fixing in this application.

[0023] The annotations in the attached figures are explained as follows:

[0024] 1. Filter tank; 2. Inlet pipe; 3. Sand collection hopper; 4. Sand discharge device; 5. Top cover; 6. Fine filter screen; 7. Cleaning mechanism; 71. Driven shaft; 72. Support frame; 73. Scraper; 74. Drive mechanism; 741. Drive shaft; 742. Turbine; 743. Drive wheel; 744. Driven wheel; 8. Outlet pipe. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] like Figures 1-6 As shown, the vortex self-washing multi-stage filtration device for Yellow River water includes a cylindrical filter tank 1. A tangentially fixed inlet pipe 2 is installed on the upper side wall of the filter tank 1. This inlet pipe 2 is fixed to the filter tank 1 via a flange connection or welding. Its tangential arrangement allows the water flow to generate vortex flow, enhancing the centrifugal separation effect. A sand collection hopper 3 is fixed at the lower end of the filter tank 1. The sand collection hopper 3 has an inverted conical structure, facilitating the collection of sediment to the bottom. A sand discharge device 4 is installed at the lower end of the sand collection hopper 3 via a flange connection, facilitating maintenance and replacement. The sand discharge device 4 can be a screw conveyor or an electric drain valve. The system is electrically connected to a controller and a power supply system. The controller controls the timed start-up for sand discharge. A top cover 5 is detachably connected to the upper end of the filter tank 1. A fine filter screen 6 is installed between the top cover 5 and the filter tank 1. The fine filter screen 6 is fixed between the top cover 5 and the flange of the filter tank 1 by bolts. A sealing ring is provided between the top cover 5, the filter tank 1 and the fine filter screen 6 to ensure the connection is airtight. The fine filter screen 6 is a stainless steel mesh with a mesh size of 80-120. A water outlet pipe 8 is formed on one side of the top cover 5. A rotatable cleaning mechanism 7 is fixed in the center of the top cover 5 to clean the mesh holes on the lower surface of the fine filter screen 6.

[0027] In another preferred embodiment of the present invention, the cleaning mechanism 7 includes a driven shaft 71 rotatably mounted in the center of the upper cover 5. The driven shaft 71 is installed in the central hole of the upper cover 5 through bearings and mechanical seals to achieve the dual functions of rotation and sealing. A drive mechanism 74 is driven and mounted on the upper end of the driven shaft 71. The lower end of the driven shaft 71 passes through the fine filter screen 6 and reaches below the fine filter screen 6. At least one support frame 72 is installed in a ring array at the lower end of the driven shaft 71, which is parallel to the lower surface of the fine filter screen 6. The support frame 72 is made of lightweight metal or composite material, and its length is slightly smaller than the radius of the filter tank to ensure full coverage of the filter screen surface. A scraper 73 is detachably connected to the side wall of the support frame 72, and its upper end contacts the lower surface of the fine filter screen 6. The scraper 73 is fixed by bolts for easy replacement after wear.

[0028] As another preferred embodiment of the present invention, the scraper 73 is made of nylon bristles or rubber sheet. Nylon bristles are suitable for cleaning dirt with strong adhesion, while rubber sheet is suitable for sediments with low hardness. Both can reduce wear on the filter screen and ensure cleaning effect.

[0029] In another preferred embodiment of the present invention, the drive mechanism 74 includes a turbine 742 rotatably disposed inside the water outlet pipe 8. The turbine 742 is made of corrosion-resistant metal or engineering plastic, and its blade design is optimized to fully utilize the kinetic energy of the water flow. The turbine 742 is fixed to one end of the drive shaft 741. The drive shaft 741 is rotatably mounted on the side wall of the water outlet pipe 8 through a bearing seat and is perpendicular to the water outlet pipe 8. A waterproof sealing structure is provided inside the bearing seat to prevent leakage. The drive shaft 741 and the driven shaft 71 are arranged parallel to each other. A drive wheel 743 is installed on the upper end of the drive shaft 741, and a driven wheel 744 is installed on the upper end of the driven shaft 71 and is connected to the drive wheel 743 for transmission. The drive wheel 743 and the driven wheel 744 are driven by gears or belts, and the transmission ratio is designed according to the speed requirements. An external protective cover is added to ensure safe operation.

[0030] As another preferred embodiment of the present invention, the rotational speed of the drive shaft 741 is not less than three times the rotational speed of the driven shaft 71. This rotational speed ratio design ensures that the scraper 73 has sufficient linear velocity to effectively scrape the filter screen, while avoiding excessive rotational speed that could lead to mechanical vibration or increased wear, thereby improving cleaning efficiency and system stability.

[0031] The working principle of this application is as follows: During use, irrigation water flows tangentially into the filter tank 1 through the inlet pipe 2 under the action of a high-pressure water pump. A high-speed rotating vortex is formed inside the tank. Under centrifugal force, denser coarse particles of silt (such as silt and fine sand) are thrown against the tank wall and spiral down along the wall to the conical sand collection hopper 3 at the bottom. The pre-purified water rises towards the central low-pressure zone. The water pre-treated by the vortex flows upward through the fine filter screen 6, where residual fine particles of silt (such as silt) are completely intercepted on the lower wall of the fine filter screen 6. The clean water collects in the chamber above the fine filter screen 6 and is then transported to the irrigation system through the outlet pipe 8 at the top.

[0032] The flow of clean water discharged from the outlet pipe 8 drives the turbine 742 to rotate. When the turbine 742 is driven by the water flow, it drives the driven shaft 71 and the scraper 73 at the bottom to rotate slowly through the power transmission. The scraper 73 is close to the lower wall of the fine filter screen 6, scraping away and stirring up the dirt intercepted on its surface. At the same time, due to the pressure difference between the upper and lower parts of the fine filter screen 6, the scraped dirt will be quickly washed down by the water flow and settle down.

[0033] All the separated and washed mud and sand particles eventually gather in the sand collection hopper 3. The sand discharger 4 is controlled by a timer. When the preset time is reached, the sand discharger 4 automatically starts for a period of time. Under the action of water pressure in the tank, the high-concentration sewage is discharged from the device by the sand discharger 4, completing one cleaning cycle.

[0034] The circuit connections involved in this application are conventional methods used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They belong to widely used prior art.

[0035] Components not described in detail in this article are existing technologies.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cyclone self-washing type multi-stage filtration device for Yellow River water, characterized in that: The filter includes a cylindrical filter tank (1), with a tangentially fixed inlet pipe (2) on the upper side wall of the filter tank (1), a sand collection hopper (3) fixed at the lower end of the filter tank (1), a sand discharger (4) detachably connected to the lower end of the sand collection hopper (3), a top cover (5) detachably connected to the upper end of the filter tank (1), a fine filter screen (6) installed between the top cover (5) and the filter tank (1), an outlet pipe (8) formed on one side of the top cover (5), and a cleaning mechanism (7) fixed in the center of the top cover (5) for rotatably cleaning the mesh holes on the lower surface of the fine filter screen (6).

2. The cyclone self-washing multi-stage filtration device for Yellow River water according to claim 1, characterized in that: The cleaning mechanism (7) includes a driven shaft (71) rotatably mounted in the center of the upper cover (5). A drive mechanism (74) is drivenly mounted on the upper end of the driven shaft (71). The lower end of the driven shaft (71) passes through the fine filter (6) and reaches below the fine filter (6). At least one support frame (72) is installed in a ring array at the lower end of the driven shaft (71) and is parallel to the lower surface of the fine filter (6). A scraper (73) with its upper end in contact with the lower surface of the fine filter (6) is detachably connected to the side wall of the support frame (72).

3. The cyclone self-washing multi-stage filtration device for Yellow River water according to claim 2, characterized in that: The scraper (73) is made of nylon bristles or rubber sheet.

4. The cyclone self-washing multi-stage filtration device for Yellow River water according to claim 2, characterized in that: The drive mechanism (74) includes a turbine (742) rotatably disposed in the water outlet pipe (8). The turbine (742) is fixed at one end of the drive shaft (741). The drive shaft (741) is rotatably mounted on the side wall of the water outlet pipe (8) through a bearing seat and is perpendicular to the water outlet pipe (8). The drive shaft (741) is parallel to the driven shaft (71). A drive wheel (743) is mounted on the upper end of the drive shaft (741), and a driven wheel (744) that is drively connected to the drive wheel (743) is mounted on the upper end of the driven shaft (71).

5. The cyclone self-washing multi-stage filtration device for Yellow River water according to claim 4, characterized in that: The rotational speed of the drive shaft (741) is not less than three times the rotational speed of the driven shaft (71).

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