A dual backwash filter

Abstract

This utility model discloses a dual backwash filter, including a filter box. An adjustment mechanism is fixedly installed on the back of the filter box, and a filter mechanism is fixedly installed on the top of the adjustment mechanism. The bottom of the filter mechanism is inserted into the interior of the filter box. This utility model adopts the above structure, and the filter achieves rapid maintenance through the coordinated operation of the adjustment mechanism and the filter mechanism. A drive motor drives a lead screw to rotate, and a U-shaped slider is synchronously driven to slide within a guide rail using reverse threads at both ends. The lifting and lowering of the filter mechanism is controlled by a connecting arm. During maintenance, the motor is started to disengage the sealing cover and filter frame from the filter box. The U-shaped structure ensures stable lifting and prevents detachment. The first and second filter screens are plug-in installed in the filter frame, allowing for direct and quick removal during maintenance without tools. The modular design facilitates individual replacement and cleaning, significantly shortening maintenance time, reducing labor costs, and improving equipment maintainability.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, and specifically relates to a dual backwash filter. Background Technology

[0002] In numerous fields such as industrial production, water treatment, and air purification, filters serve as critical equipment, playing a vital role in removing impurities from fluids and ensuring stable system operation. However, current filters on the market still face many unresolved issues in practical applications. On the one hand, existing filters have complex internal structures, and the disassembly process for core components such as filter elements and screens is cumbersome. Maintenance often requires specialized tools, consuming significant manpower and time, resulting in long downtime maintenance cycles and severely impacting production efficiency. On the other hand, some filters lack backwashing structures. During prolonged use, dust, particles, and other impurities continuously accumulate on the surface and pores of the filter screen, easily causing clogging. This not only significantly reduces filtration efficiency but may also lead to filter screen damage due to excessive pressure, further shortening the filter's lifespan. Utility Model Content

[0003] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a dual backwash filter to solve the problems of the cumbersome and inconvenient overall inspection and maintenance during the application of the existing technology and the lack of a backwash structure in the existing technology.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A dual backwash filter includes a filter box, an adjustment mechanism fixedly installed on the back of the filter box, a filter mechanism fixedly installed on the top of the adjustment mechanism, the bottom of the filter mechanism inserted into the interior of the filter box, a flushing pump fixedly installed on one side of the filter box, the output end of the flushing pump being connected to the bottom of the filter box, a drain hopper fixedly installed at the bottom of the filter box, and a drain valve fixedly installed at the bottom of the drain hopper.

[0006] The adjustment mechanism includes a guide rail, which is fixedly installed in the middle of the back of the filter box. A drive motor is fixedly installed at the bottom of the guide rail, and the output end of the drive motor passes through the guide rail. A lead screw is rotatably connected inside the guide rail, and the two ends of the lead screw have opposite threads. A slider is threadedly connected to the outer surface of the lead screw, and the slider is slidably connected inside the guide rail. A connecting arm is fixedly connected to the outer side of the guide rail, and the outer end of the connecting arm is connected to the filter mechanism.

[0007] Furthermore, the overall cross-sectional shape of the internal cavity of the guide rail is convex, and the top view of the slider is also convex.

[0008] Furthermore, support legs are fixedly installed at the four corners of the bottom of the filter box, and a base plate is fixedly installed at the bottom of the support legs.

[0009] Furthermore, the filtration mechanism includes a sealing cover, which is fixedly installed on the top of the connecting arm. A water inlet is fixedly installed on the top of the sealing cover, and a filter frame is fixedly installed on the bottom of the sealing cover. The filter frame has two mounting slots arranged linearly at equal intervals inside. A first filter screen and a second filter screen are respectively inserted into the mounting slots. The filter frame is inserted into the upper part of the filter box. The sealing cover covers the top of the filter box. The cross-sectional shape of the first filter screen and the second filter screen is set as an isosceles triangle.

[0010] Furthermore, a conveying hose is fixedly connected to the outer end of the water inlet hopper, and the output end of the conveying hose is connected to the interior of the water inlet hopper.

[0011] Furthermore, a connecting flange is fixedly installed at the outer end of the delivery hose, and mounting holes are arranged in a ring at equal intervals on the outer side of the connecting flange.

[0012] Furthermore, a flushing supply pipe is fixedly connected to the input end of the flushing pump, and a connecting flange is also fixedly connected to the input end of the flushing supply pipe.

[0013] In summary, the present invention has the following main advantages:

[0014] First, this filter achieves rapid maintenance through the coordinated operation of the adjustment mechanism and the filtration mechanism. The drive motor drives the lead screw to rotate, and the reverse threads at both ends synchronously drive the U-shaped slider to slide in the guide rail. The lifting and lowering of the filtration mechanism is controlled by the connecting arm. During maintenance, the motor is started to detach the sealing cover and filter frame from the filter box. The U-shaped structure ensures stable lifting and prevents detachment. The first and second filter screens are plug-in installed in the filter frame and can be directly and quickly pulled out during maintenance without tools. The modular design facilitates individual replacement and cleaning, greatly shortening maintenance time, reducing labor costs, and improving equipment maintainability.

[0015] Secondly, during the application of this device, its flushing pump pumps clean water back into the filter box from the bottom, powerfully flushing the first and second filter screens. The filter screen design with an isosceles triangular cross-section allows debris to slide quickly down the slope to the edge and be discharged during backwashing, avoiding accumulation and clogging, and ensuring thorough backwashing. The plug-in filter screen installation method supports quick removal for deep cleaning or replacement, further enhancing the anti-clogging effect. This design, combined with backwashing and a special structure, improves filtration efficiency, extends filter screen life, reduces downtime and maintenance costs caused by clogging, and ensures long-term stable operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view structural diagram of the present invention;

[0018] Figure 3 This is a rear view schematic diagram of the unfolded structure of this utility model;

[0019] Figure 4 This is a front view schematic diagram of the unfolded structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the first filter structure of this utility model.

[0021] Reference numerals: 1. Filter box; 2. Adjustment mechanism; 21. Guide rail; 22. Drive motor; 23. Connecting arm; 24. Lead screw; 25. Slider; 3. Filtering mechanism; 31. Sealing cover; 32. Water inlet hopper; 33. Filter frame; 34. Mounting groove; 35. First filter screen; 36. Second filter screen; 37. Delivery hose; 38. Connecting flange; 4. Flushing pump; 5. Drain hopper; 6. Drain valve; 7. Support leg; 8. Base plate; 9. Flushing supply pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please refer to Figure 1-5 A dual backwash filter according to this embodiment includes a filter box 1, an adjustment mechanism 2 is fixedly installed on the back of the filter box 1, a filter mechanism 3 is fixedly installed on the top of the adjustment mechanism 2, the bottom of the filter mechanism 3 is inserted into the inside of the filter box 1, a flushing pump 4 is fixedly installed on one side of the filter box 1, the output end of the flushing pump 4 is connected to the bottom of the filter box 1, a drain hopper 5 is fixedly installed at the bottom of the filter box 1, and a drain valve 6 is fixedly installed at the bottom of the drain hopper 5.

[0025] The adjusting mechanism 2 includes a guide rail 21, which is fixedly installed in the middle of the back of the filter box 1. A drive motor 22 is fixedly installed at the bottom of the guide rail 21, and the output end of the drive motor 22 passes through the guide rail 21. A lead screw 24 is rotatably connected inside the guide rail 21, with the two ends of the lead screw 24 having opposite threads. A slider 25 is threadedly connected to the outer surface of the lead screw 24, and the slider 25 is slidably connected inside the guide rail 21. A connecting arm 23 is fixedly connected to the outer side of the guide rail 21, and the outer end of the connecting arm 23 is connected to the filter mechanism 3. During the application of this device, when the fluid to be filtered enters the first filter screen 35 and the second filter screen 36 of the filter mechanism 3 through the inlet hopper 32, impurities are trapped, and the clean fluid is discharged from the filter box 1. When backwashing is required, the backwash pump 4 is started, and clean water is backwashed from the bottom of the filter box 1. The filter screen is flushed by the pump, and debris is guided to the edge by the inclined plane of the isosceles triangular filter screen and discharged through the drain hopper 5 and drain valve 6. In the adjusting mechanism 2, the drive motor 22 drives the lead screw 24 to rotate. By using the opposite screw threads at both ends of the lead screw 24, the sliders 25 on both sides slide synchronously in opposite directions within the convex guide rail 21. The connecting arm 23 drives the filter mechanism 3 (sealing cover 31, filter frame 33 and filter screen) to rise and fall, realizing the separation or closure of the filter mechanism 3 from the filter box 1. During maintenance, the drive motor 22 drives the filter mechanism 3 to rise and detach from the filter box 1, and the plug-in installed first filter screen 35 and second filter screen 36 can be quickly pulled out for cleaning or replacement. The convex guide rail 21 and the slider 25 cooperate to ensure stable lifting and prevent detachment, ensuring the convenience of equipment maintenance and the continuity of operation.

[0026] Please refer to Figures 2-3 The internal cavity of the guide rail 21 has a convex cross-sectional shape, and the slider 25 also has a convex shape when viewed from above. Support legs 7 are fixedly installed at the four corners of the bottom of the filter box 1, and a base plate 8 is fixedly installed at the bottom of the support legs 7. During the application of this device, in its double backwash filter, both the internal cavity of the guide rail 21 and the slider 25 adopt a convex design. Utilizing the locking characteristic of the convex structure, when the slider 25 slides within the guide rail 21, the flanges on both sides form a lateral limit, preventing the slider 25 from detaching from the side of the guide rail 21. Simultaneously, it ensures that the slider 25 moves smoothly longitudinally along the guide rail 21, providing stability for the lifting and lowering of the filter mechanism 3. With a fixed support, when the drive motor 22 drives the lead screw 24 to rotate, the reverse threads at both ends of the lead screw 24 drive the two convex sliders 25 on both sides to slide synchronously in opposite directions. Through the connecting arm 23, the filter mechanism 3 (sealing cover 31, filter frame 33, etc.) is driven to rise and fall vertically, realizing the precise closing or separation of the filter mechanism 3 and the filter box 1. The support legs 7 at the four corners of the bottom of the filter box 1 are combined with the base plate 8 to increase the contact area between the equipment and the ground, distribute the weight of the filter box 1, enhance the overall structural stability, and avoid the equipment shaking due to water flow impact or backwash pressure during the filtration process, ensuring the reliability and safety of the components working together.

[0027] Please refer to Figures 4-5 The filter mechanism 3 includes a sealing cover 31, which is fixedly installed on the top of the connecting arm 23. A water inlet 32 ​​is fixedly installed on the top of the sealing cover 31, and a filter frame 33 is fixedly installed on the bottom of the sealing cover 31. Two mounting slots 34 are linearly arranged at equal intervals inside the filter frame 33. A first filter screen 35 and a second filter screen 36 are respectively inserted into the mounting slots 34. The filter frame 33 is inserted into the upper part of the filter box 1. The sealing cover 31 covers the top of the filter box 1. The cross-sectional shape of the first filter screen 35 and the second filter screen 36 is set as an isosceles triangle. A conveying hose 37 is fixedly connected to the outer end of the water inlet 32. The output end of the conveying hose 37 is connected to the interior of the water inlet 32. During the application of this device, the fluid to be filtered enters from the water inlet 32 ​​through the conveying hose 37, and is guided by the sealing cover 31 to the first filter screen 35 and the second filter screen 36 inside the filter frame 33. Multiple isosceles triangular cross-section filter screens are formed. As fluid permeates from the outside to the inside of the filter slope, impurities are trapped on the surface and in the pores of the filter screen. Clean fluid passes through the filter screen and enters the filter box 1, then exits through the outlet. During filtration, the adjusting mechanism 2 lowers the sealing cover 31 and filter frame 33 via the connecting arm 23, so that the sealing cover 31 tightly covers the top of the filter box 1, forming a sealed filtration space. During backwashing, the flushing pump 4 pumps clean water from the bottom of the filter box 1, impacting the filter screen in the reverse direction. Since the filter screen is an isosceles triangle, the washed-down debris slides quickly down the slope to the edge of the filter screen and falls into the bottom drain hopper 5 through the gap between the filter frame 33 and the filter box 1. During maintenance, the sealing cover 31 can be raised by the adjusting mechanism 2, and the first filter screen 35 and the second filter screen 36 can be directly pulled out from the mounting slot 34 of the filter frame 33. Its plug-in design facilitates quick cleaning or replacement, while the isosceles triangle structure reduces debris retention, improves backwashing efficiency, and enhances the convenience of filter screen maintenance.

[0028] Please refer to Figures 1-4A connecting flange 38 is fixedly installed at the outer end of the delivery hose 37. Mounting holes are arranged in a ring at equal intervals on the outer side of the connecting flange 38. A flushing supply pipe 9 is fixedly connected to the input end of the flushing pump 4, and a connecting flange 38 is also fixedly connected to the input end of the flushing supply pipe 9. In this dual backwash filter, the connecting flange 38 at the outer end of the delivery hose 37 can be bolted to an external delivery pipe, such as a water inlet pipe, through the ring-shaped mounting holes, allowing the fluid to be filtered to enter. The equal-interval design of the mounting holes ensures the sealing and stability of the flange connection, preventing fluid leakage. The flushing supply pipe 9 at the input end of the flushing pump 4 is connected to an external clean water source, such as a clean water pipe, through the connecting flange 38, and is also fixed with bolts using mounting holes to ensure a stable supply of clean water during backwashing. During filtration, the fluid to be filtered enters the filter mechanism 3 through the delivery hose 37 connected by the connecting flange 38 and the inlet hopper 32. During backwashing, the flushing pump 4 draws clean water from an external water source through the connecting flange 38 of the flushing supply pipe 9, pumps it into the bottom of the filter box 1 through the output end, and backwashes the filter screen. The wastewater carrying impurities is discharged from the drain hopper 5. The design of the connecting flange 38 and the mounting hole facilitates the easy assembly and disassembly of the delivery hose 37 and the flushing supply pipe 9, enabling quick connection or maintenance of the equipment to external piping systems, while ensuring the reliability and sealing of the fluid transmission process.

[0029] Operating principle and advantages: This filter achieves quick disassembly and convenient maintenance through the coordinated design of the adjustment mechanism 2 and the filter mechanism 3. In the adjustment mechanism 2, the drive motor 22 drives the lead screw 24 to rotate. By utilizing the opposite thread directions at both ends of the lead screw 24, the sliders 25 on both sides can be driven to slide in opposite directions within the convex guide rail 21. They are connected to the filter mechanism 3 through the connecting arm 23, thereby realizing the lifting and lowering adjustment of the filter mechanism 3. When maintenance is required, the drive motor 22 is started to raise the sealing cover 31 and the filter frame 33 and disengage them from the filter box 1. At this time, the cooperation between the convex slider 25 and the guide rail 21 ensures the stability of the lifting process and prevents the slider 25 from accidentally falling out. In addition, the first filter screen 35 and the second filter screen 36 are installed in the mounting groove 34 of the filter frame 33 by plug-in type. They can be pulled out directly and quickly during maintenance without the need for complicated tools, which greatly shortens the maintenance time and reduces labor costs. At the same time, the modular design also facilitates the individual replacement and cleaning of the filter screens, significantly improving the maintainability of the equipment.

[0030] The filter is equipped with a backwash pump 4 that pumps clean water in reverse from the bottom of the filter box 1 to powerfully wash the first filter screen 35 and the second filter screen 36, effectively removing impurities from the filter screen surface and pores. Uniquely, the first filter screen 35 and the second filter screen 36 adopt an isosceles triangular cross-section design. This shape allows the debris washed down during backwashing to quickly slide down the slope to the edge of the filter screen, avoiding debris accumulation on the filter screen surface or in the pores and causing blockage. Structurally, this ensures the thoroughness and efficiency of backwashing. At the same time, the plug-in installation method of the first filter screen 35 and the second filter screen 36 allows the filter screen to be quickly pulled out for deep cleaning or replacement when necessary, further enhancing the anti-clogging effect. This design, which combines backwashing function with special filter screen structure, not only improves filtration efficiency but also extends the service life of the filter screen, ensuring long-term stable operation of the filter and reducing the number of downtimes and maintenance costs caused by filter screen blockage.

[0031] The main component parameters and electronic component specifications of this dual backwash filter are as follows: Filter box 1 is made of 304 stainless steel, with a wall thickness of 3-5mm, a diameter of 800-1200mm, and a height of 1500-2000mm; guide rail 21 is made of aluminum alloy profile, with a convex groove width of 40-60mm, a depth of 30-40mm, and a length of 600-800mm; lead screw 24 uses trapezoidal thread (Tr32×6 or Tr40×7), with a length of 500-700mm and opposite thread directions at both ends; slider 25 is made of 45# steel with heat treatment, and the convex dimensions match the groove of guide rail 21, with tolerance controlled within ±0.05mm; the first filter screen 35 and the second filter screen 36 are made of 316L stainless steel woven mesh. Mesh size 100-300 mesh, isosceles triangle cross-section height 150-250mm, base width 200-350mm; conveying hose 37 and flushing supply pipe 9 use DN50-DN100 rubber hoses, pressure ≥1.0MPa; connecting flange 38 adopts PN1.0-PN1.6 standard, outer diameter 150-220mm, thickness 16-20mm, evenly distributed with 4-8 φ14-φ18 mounting holes; in terms of electronic components, drive motor 22 is a YE3-100L2-4 type three-phase asynchronous motor, power 1.5-3kW, voltage 380V, speed 1440r / min; flushing pump 4 is an ISG50-160 type centrifugal pump, flow rate 12.5-25m³ / min. 3 / h, head 32-50m, power 3-5.5kW, voltage 380V; drain valve 6 is a Q41F-16C type ball valve with a diameter of DN80-DN100; power supply is three-phase five-wire 380V / 50Hz, total power 5-10kW, equipped with an independent distribution box, with built-in circuit breaker (rated current 25-40A), contactor (CJX2-2510) and thermal relay (JR36-20 / 3D) and other protection devices.

[0032] 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 dual backwash filter, characterized in that: Includes a filter box (1), an adjustment mechanism (2) is fixedly installed on the back of the filter box (1), a filter mechanism (3) is fixedly installed on the top of the adjustment mechanism (2), the bottom of the filter mechanism (3) is inserted into the inside of the filter box (1), a flushing pump (4) is fixedly installed on one side of the filter box (1), the output end of the flushing pump (4) is connected to the bottom of the filter box (1), a drain bucket (5) is fixedly installed at the bottom of the filter box (1), and a drain valve (6) is fixedly installed at the bottom of the drain bucket (5). The adjustment mechanism (2) includes a guide rail (21), which is fixedly installed in the middle of the back of the filter box (1). A drive motor (22) is fixedly installed at the bottom of the guide rail (21). The output end of the drive motor (22) passes through the guide rail (21). A lead screw (24) is rotatably connected inside the guide rail (21). The two ends of the lead screw (24) have opposite threads. A slider (25) is threadedly connected to the outer surface of the lead screw (24). The slider (25) is slidably connected inside the guide rail (21). A connecting arm (23) is fixedly connected to the outer side of the guide rail (21). The outer end of the connecting arm (23) is connected to the filter mechanism (3).

2. The dual backwash filter according to claim 1, characterized in that: The internal cavity of the guide rail (21) has a convex cross-sectional shape, and the slider (25) also has a convex shape when viewed from above.

3. A dual backwash filter according to claim 1, characterized in that: The filter box (1) is fixedly installed with support legs (7) at the four corners of the bottom, and the bottom of the support legs (7) is fixedly installed with a base plate (8).

4. A dual backwash filter according to claim 1, characterized in that: The filtration mechanism (3) includes a sealing cover (31), which is fixedly installed on the top of the connecting arm (23). A water inlet (32) is fixedly installed on the top of the sealing cover (31), and a filter frame (33) is fixedly installed on the bottom of the sealing cover (31). The filter frame (33) has two mounting slots (34) arranged linearly at equal intervals inside. A first filter screen (35) and a second filter screen (36) are respectively inserted into the mounting slots (34). The filter frame (33) is inserted into the upper part of the filter box (1), and the sealing cover (31) covers the top of the filter box (1). The cross-sectional shape of the first filter screen (35) and the second filter screen (36) is set as an isosceles triangle.

5. A dual backwash filter according to claim 4, characterized in that: The outer end of the water inlet bucket (32) is fixedly connected to a conveying hose (37), and the output end of the conveying hose (37) is connected to the inside of the water inlet bucket (32).

6. A dual backwash filter according to claim 5, characterized in that: The outer end of the delivery hose (37) is fixedly installed with a connecting flange (38), and the outer side of the connecting flange (38) is provided with mounting holes arranged in a ring at equal intervals.

7. A dual backwash filter according to claim 1, characterized in that: The flushing pump (4) is fixedly connected to a flushing supply pipe (9), and the flushing supply pipe (9) is also fixedly connected to a connecting flange (38).

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