Continuous automatic backwashing screen filter in front of multi-silt water source submersible pump

Abstract

The utility model relates to a continuous automatic backwashing screen filter in front of a multi-silt water source submersible pump, and belongs to the technical field of farmland water-saving irrigation equipment. Comprising a cylindrical shell, the cylindrical shell is provided with a plurality of groups of filter holes and a cylindrical filter screen, and the cylindrical filter screen is connected with an upper connecting disc and a lower connecting disc; a submersible pump water inlet shell of the submersible pump is connected with the upper connecting disc, the cleaning mechanism comprises a hollow rotator, and the side wall of the hollow rotator is connected with a water guide pipe; the other end of the water guide pipe is connected with a water spraying pipe which is provided with a plurality of fan-shaped sprayers. The filtering holes in the cylindrical shell are used for filtering large impurities, and the cylindrical filtering net is used for filtering tiny impurities, so that double-layer filtering is realized, and the filtering effect is improved; the cleaning mechanism is used for backwashing by using high-pressure water flow to continuously remove impurities on the filter screen, so that blockage is avoided, and the filtering effect is ensured; manual intervention is not needed, maintenance workload is reduced, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of farmland water-saving irrigation equipment, in particular to a continuous automatic backwashing mesh filter in front of a submersible pump for a water source with a lot of mud and sand. Background Art

[0002] Micro-irrigation is a method of delivering water and nutrients needed for crop growth directly to the soil near the crop roots at a low, uniform, and accurate rate, using a piping system and emitters installed at the end of the pipes, tailored to the crop's needs. However, due to the narrow apertures of the emitters, which are easily clogged by impurities, high water purity is required.

[0003] Currently, similar technologies used for filtering farmland micro-irrigation water sources both domestically and internationally include mesh filters. Their filtration principle: Using a dense, fine fabric as the filter medium, when irrigation water flows into the filter and hits the screen, the liquid circulates, and impurities are trapped by the filter core due to inertia. All impurity particles larger than the mesh size are retained on the filter, while clean water flows through the core and into the outlet, thus separating impurities from the mother liquor. This mesh filter is primarily used to filter impurities such as powder, sand, and scale from irrigation water. It can also be used to filter irrigation water containing small amounts of organic matter. It is generally cylindrical in shape and consists primarily of a sealed housing, a filter screen, and a sealing and waterstop. All components should be made of pressure-resistant and corrosion-resistant metal or plastic.

[0004] The main problem with this mesh filter is that it is only suitable for irrigation water sources with low contaminant content, such as well water or water from reservoirs, ponds, and lakes that has been settled. When the irrigation water source has a slightly higher contaminant content, the filtration effect becomes very poor, and the filter is easily clogged, requiring frequent flushing, which is time-consuming and labor-intensive. Especially under high pressure, large amounts of impurities such as powder, sand, and scale can quickly or instantly clog the mesh surface with impurities. The water pressure can then cause the mesh to deform or even damage. Organic contaminants can then squeeze through the filter and enter the pipes, causing blockages in the system and emitters.

[0005] Therefore, the present application proposes a technical solution for continuously and automatically backwashing a mesh filter in front of a submersible pump for a water source with a lot of mud and sand to solve the above problems. Utility Model Content

[0006] The utility model provides a continuous automatic backwashing mesh filter in front of a submersible pump for a water source with a lot of mud and sand, which adopts the following technical solution: a continuous automatic backwashing mesh filter in front of a submersible pump for a water source with a lot of mud and sand, comprising:

[0007] A cylindrical housing, wherein a plurality of filter holes are evenly arranged on the outer side of the cylindrical housing, a cylindrical filter screen is arranged inside the cylindrical housing, an upper connecting plate is installed on the upper part of the cylindrical housing, and a lower connecting plate is installed on the bottom;

[0008] A cylindrical filter screen, wherein the upper portion of the cylindrical filter screen is connected to the upper connecting plate, and the lower portion of the cylindrical filter screen is connected to the lower connecting plate;

[0009] A submersible pump, wherein the submersible pump water inlet housing is connected to the upper connecting plate, and the submersible pump water outlet is connected to a water outlet pipe;

[0010] A water outlet pipe, the other end of which is connected in sequence to a high-pressure water pipe, a pressure gauge and a valve;

[0011] The cleaning mechanism includes a hollow rotator, which is installed on the center of the lower connecting plate. The side wall of the hollow rotator is connected to a water pipe; the other end of the water pipe is connected to a water spray pipe; the water spray pipe is provided with a plurality of fan-shaped nozzles, and both ends of the water spray pipe are provided with plugs;

[0012] A high-pressure water pipe, one end of which is connected to the side wall of the water outlet pipe, and the other end passes through the center of the lower connecting plate and is connected to the hollow rotator. A pressure regulating throttle valve is installed near the water outlet pipe.

[0013] Furthermore, the cylindrical filter screen is a filter screen with a mesh size of 80 to 120.

[0014] Furthermore, there are a plurality of fan-shaped nozzles, which are evenly arranged on the water spray pipe, and all the fan-shaped nozzles are located in the same plane.

[0015] Furthermore, the water guide pipe is arranged horizontally, the water spray pipe is arranged vertically to the water guide pipe, and the fan-shaped nozzle forms a certain angle with the radial direction of the water spray pipe.

[0016] Furthermore, support ribs are installed at both ends of the cylindrical filter screen, and the support ribs at both ends are fixedly installed on the upper connecting plate and the lower connecting plate respectively, and rubber waterstops are provided between the support ribs at both ends and the upper connecting plate and the lower connecting plate.

[0017] Furthermore, the diameter of the filter hole is larger than the diameter of the cylindrical filter screen.

[0018] Furthermore, the upper connecting plate and the lower connecting plate are connected by screws and a cylindrical filter screen, and a rubber waterstop is provided between the screws and the cylindrical filter screen; a plurality of screw rods are evenly provided on the cylindrical filter screen, and the screw rods vertically pass through the upper connecting plate and the lower connecting plate, and the screw rods are located on the outer sides of the upper connecting plate and the lower connecting plate and are fixed with nuts.

[0019] Furthermore, the cylindrical filter screen, hollow rotator, water guide pipe, water spray pipe, fan-shaped nozzle, upper connecting plate, lower connecting plate, and screw rod are all made of stainless steel.

[0020] Furthermore, when the water pressure of the submersible pump does not meet the water pressure required by the cleaning device, a pressure booster pump is installed at the position of the pressure regulating throttle valve to make the water pressure meet the water pressure requirement of the cleaning device.

[0021] In summary, the present invention has the following beneficial technical effects:

[0022] 1. High-efficiency filtration: The filter holes on the cylindrical shell filter larger impurities, and the cylindrical filter screen (80-120 mesh) filters tiny impurities, achieving double-layer filtration and improving the filtration effect; the cleaning mechanism uses high-pressure water flow for backwashing to continuously remove impurities on the filter screen, avoid clogging, and ensure the filtration effect; no manual intervention is required, reducing maintenance workload and improving efficiency.

[0023] 2. Pressure-resistant and durable: The main components such as the filter, rotator, water pipe, and spray pipe are made of stainless steel, which is pressure-resistant and durable and can adapt to high-pressure working conditions; a rubber waterstop is set between the cylindrical shell and the filter to effectively seal and prevent water leakage.

[0024] 3. Wide range of applications: It can effectively filter water sources with high mud and sand content, expanding the scope of application of micro-irrigation water sources; pressure-resistant design, suitable for high-pressure irrigation systems.

[0025] 4. Easy maintenance: The filter has a simple structure and is easy to install and maintain; the continuous automatic backwashing function reduces manual cleaning and reduces maintenance costs.

[0026] 5. The present invention provides a continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sand water source. It fully utilizes the high-pressure clean water flow provided by the pressure water pipe and organically combines it with the cleaning mechanism in the filter screen to avoid blockage during the filtration process, thereby improving the filtration effect, increasing the service life of the filter, and expanding the scope of application of micro-irrigation water sources. It will greatly promote the development of water-saving irrigation, saving water resources and improving crop yield and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the utility model;

[0028] Figure 2 It is a structural diagram of the cleaning mechanism of the utility model;

[0029] Figure 3 It is a partial structural diagram of the utility model.

[0030] Explanation of the accompanying symbols: 1. Cylindrical shell; 2. Cylindrical filter screen; 3. Hollow rotator; 4. Pressure regulating throttle valve; 5. Water guide pipe; 6. Water spray pipe; 7. Fan-shaped nozzle; 8. High-pressure water pipe; 9. Upper connecting plate; 10. Lower connecting plate; 11. Screw; 12. Water outlet pipe; 13. Pressure gauge; 14. Valve; 15. Submersible pump; 16. Submersible pump water inlet shell. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3 The specific embodiment of a continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sand water source shown in the figure comprises: a cylindrical housing 1, a plurality of groups of filter holes evenly arranged on the outer side of the cylindrical housing 1, a cylindrical filter screen 2 disposed inside the cylindrical housing 1, an upper connecting plate 9 mounted on the upper portion of the cylindrical housing 1, and a lower connecting plate 10 mounted on the bottom; the upper portion of the cylindrical filter screen 2 is connected to the upper connecting plate 9, and the lower portion is connected to the lower connecting plate 10; a submersible pump inlet housing 16 of a submersible pump 15 is connected to the upper connecting plate 9, and the water outlet of the submersible pump 15 is connected to a water outlet pipe 12; the other end of the water outlet pipe 12 is sequentially connected to a high-pressure water pipe 8, a pressure gauge 13, and a valve 14;

[0033] The cleaning mechanism includes a hollow rotator 3, which is installed on the center of the lower connecting plate 10. The side wall of the hollow rotator 3 is connected to a water pipe 5; the other end of the water pipe 5 is connected to a water spray pipe 6; the water spray pipe 6 is provided with a plurality of fan-shaped nozzles 7, and both ends of the water spray pipe 6 are provided with plugs;

[0034] A high-pressure water pipe 8, one end of which is connected to the side wall of the water outlet pipe 12, and the other end passes through the center of the lower connecting plate 10 and is connected to the hollow rotator 3. A pressure regulating throttle valve 4 is installed near the water outlet pipe 12 of the high-pressure water pipe 8.

[0035] Specifically, the cylindrical shell 1 is provided with a plurality of filter holes, the diameter of which is larger than the aperture of the cylindrical filter 2, and mainly filters out larger particle size impurities and dirt in the water source, while also protecting the internal structure;

[0036] Specifically, the cylindrical filter 2 is a filter with a mesh size of 80 to 120, which mainly filters impurities and dirt larger than the mesh size.

[0037] Specifically, the valve 14 and the pressure regulating throttle valve 4 are used to regulate the pressure in the high-pressure water pipe 8 to meet the pressure requirement of continuous backwashing of the cleaning mechanism.

[0038] Specifically, there are several fan-shaped nozzles 7, which are evenly arranged on the water pipe 6, and all the fan-shaped nozzles 7 are located in the same plane. The water pipe 5 is arranged horizontally, and the water pipe 6 is arranged vertically to the water pipe 5. The fan-shaped nozzles 7 form a certain angle with the radial direction of the water pipe 6. Its function is to rely on the natural reverse thrust formed by the water spraying to drive the water pipe 6 to rotate 360°. The water flow sprayed by each fan-shaped nozzle 7 is a vertical fan-shaped water flow. The water flow sprayed by multiple fan-shaped nozzles 7 is connected into a vertical water curtain when it reaches the inner surface of the cylindrical filter screen 2. Under the impact of the reverse high-speed water flow, the dirt stuck to the outer surface of the cylindrical filter screen 2 can be flushed to the surface of the cylindrical filter screen 2, so as to achieve non-stop cleaning of the dirt, thereby ensuring the normal and safe operation of the system.

[0039] In other preferred embodiments, support ribs (not shown in the figure) are installed at both ends of the cylindrical filter screen 2, and the support ribs at both ends are fixedly installed on the upper connecting plate 9 and the lower connecting plate 10 respectively, and rubber waterstops (not shown in the figure) are provided between the support ribs at both ends and the upper connecting plate 9 and the lower connecting plate 10; the upper connecting plate 9 and the lower connecting plate 10 are both connected to the cylindrical filter screen 2 by screws, and a rubber waterstop is provided between the screws and the cylindrical filter screen 2; a plurality of screw rods 11 are evenly provided on the cylindrical filter screen 2, and the screw rods 11 vertically pass through the upper connecting plate 9 and the lower connecting plate 10, and the screw rods 11 are located on the outer parts of the upper connecting plate 9 and the lower connecting plate 10 and are fixed with nuts.

[0040] Specifically, a rubber waterstop is provided to ensure the sealing of the device itself and prevent water leakage.

[0041] In other preferred embodiments, the cylindrical filter screen 2, hollow rotator 3, water guide pipe 5, water spray pipe 6, fan-shaped nozzle 7, upper connecting plate 9, lower connecting plate 10, and screw rod 11 are all made of stainless steel.

[0042] Specifically, the main components are made of stainless steel, which is pressure-resistant and durable and can adapt to high-pressure working conditions.

[0043] In other preferred embodiments, when the water pressure of the submersible pump 15 does not meet the water pressure required by the cleaning device, a pressure booster pump is additionally installed at the position of the pressure regulating throttle valve 4 to make the water pressure meet the water pressure requirement of the cleaning device.

[0044] In other preferred embodiments, a float (not shown in the figure) is installed on the submersible pump 15. The float prevents the submersible pump 15 from sinking to the bottom and pumps water from the middle layer of the water source.

[0045] Working Principle: The utility model is installed below the water surface at the submersible pump inlet housing 16 and perpendicular to the horizontal plane. Water first passes through the cylindrical housing 1 to filter out larger impurities and dirt particles larger than the filter aperture. The water then enters the cylindrical filter screen 2, where it further filters out smaller impurities and dirt particles larger than the aperture. The water then enters the submersible pump 15 and reaches the outlet pipe 12. The high-pressure water pipe 8, under the action of the outlet pressure difference of the submersible pump 15, passes through the reaction force generated by the fan-shaped nozzle 7 installed on the vertical water spray pipe 6 and at a certain angle to its radial direction. This water pipe 5 drives the hollow rotator 3 to rotate continuously 360°, thereby achieving a continuous automatic backwash function from the inside out of the cylindrical filter screen 2. If the flushing pressure is too low, resulting in a poor flushing effect, the pressure can be immediately adjusted through the pressure regulating throttle valve 4 and valve 14. When the water pressure of the submersible pump 15 does not meet the water pressure required by the cleaning device, a pipeline pressure pump can be installed at the position of the pressure regulating throttle valve 4 to make the water pressure reach the water pressure requirement of the cleaning device.

[0046] Specifically, the filter of the present invention is installed at the front end of the water inlet of the submersible pump 15. Mud and sand debris do not enter the pipeline system, but are directly discharged into the water. The filter can accommodate a large amount of mud and sand debris for easy cleaning.

[0047] Specifically, the present invention solves the problem of loose sealing of pipeline interfaces and no water leakage during vacuuming in the prior art by adopting a submersible pump 15 .

[0048] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source, characterized in that: include: A cylindrical housing, wherein a plurality of filter holes are evenly arranged on the outer side of the cylindrical housing, a cylindrical filter screen is arranged inside the cylindrical housing, an upper connecting plate is installed on the upper part of the cylindrical housing, and a lower connecting plate is installed on the bottom; A cylindrical filter screen, wherein the upper portion of the cylindrical filter screen is connected to the upper connecting plate, and the lower portion of the cylindrical filter screen is connected to the lower connecting plate; A submersible pump, wherein the submersible pump water inlet housing is connected to the upper connecting plate, and the submersible pump water outlet is connected to a water outlet pipe; A water outlet pipe, the other end of which is connected in sequence to a high-pressure water pipe, a pressure gauge and a valve; The cleaning mechanism includes a hollow rotator, which is installed on the center of the lower connecting plate. The side wall of the hollow rotator is connected to a water pipe; the other end of the water pipe is connected to a water spray pipe; the water spray pipe is provided with a plurality of fan-shaped nozzles, and both ends of the water spray pipe are provided with plugs; A high-pressure water pipe, one end of which is connected to the side wall of the water outlet pipe, and the other end passes through the center of the lower connecting plate and is connected to the hollow rotator. A pressure regulating throttle valve is installed near the water outlet pipe.

2. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 1 is characterized in that: The cylindrical filter screen is a filter screen with 80 meshes to 120 meshes.

3. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 1 is characterized in that: There are a plurality of fan-shaped nozzles, which are evenly arranged on the water spray pipe, and all the fan-shaped nozzles are located in the same plane.

4. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 3 is characterized in that: The water guide pipe is arranged horizontally, the water spray pipe is arranged vertically to the water guide pipe, and the fan-shaped nozzle forms a certain angle with the radial direction of the water spray pipe.

5. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 1 is characterized in that: Support ribs are installed at both ends of the cylindrical filter screen, and the support ribs at both ends are fixedly installed on the upper connecting plate and the lower connecting plate respectively, and rubber waterstops are provided between the support ribs at both ends and the upper connecting plate and the lower connecting plate.

6. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 2 is characterized in that: The diameter of the filter hole is larger than the diameter of the cylindrical filter screen.

7. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 1 is characterized in that: The upper connecting plate and the lower connecting plate are connected by screws and a cylindrical filter screen, and a rubber water stop is provided between the screws and the cylindrical filter screen; a plurality of screw rods are evenly provided on the cylindrical filter screen, and the screw rods vertically pass through the upper connecting plate and the lower connecting plate, and the screw rods are located on the outer sides of the upper connecting plate and the lower connecting plate and are fixed with nuts.

8. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 7 is characterized in that: The cylindrical filter screen, hollow rotator, water guide pipe, water spray pipe, fan-shaped nozzle, upper connecting plate, lower connecting plate and screw rod are all made of stainless steel.

9. The continuous automatic backwashing screen filter in front of a submersible pump for a high-mud and sandy water source according to claim 1, characterized in that: When the water pressure of the submersible pump does not meet the water pressure requirements of the cleaning device, a pressure booster pump should be installed at the position of the pressure regulating throttle valve to make the water pressure meet the water pressure requirements of the cleaning device.

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