Duplex switching filter capable of backwashing

Abstract

The utility model relates to the technical field of filters, in particular to a duplex switching filter capable of backwashing, which comprises two cylinders, two connecting pipes, a three-way ball valve, a metal filter element and a cleaning component, the cylinders are arranged in parallel, the two connecting pipes which are arranged in parallel up and down are connected onto the cylinders, the connecting pipes on the two cylinders are connected with the three-way ball valve, and the metal filter element is connected with the cleaning component through the three-way ball valve. The number of the metal filter elements corresponds to that of the cylinders, the metal filter elements are installed in the cylinders, and the cleaning assembly is connected to the metal filter elements and comprises a guide rod, a sliding seat, a cleaning scraping ring and a guide wing plate. According to the utility model, the cleaning assembly capable of cleaning the metal filter element is arranged, so that the reverse wing plate and the cleaning scraping ring can be driven to move to clean the outer wall of the metal filter element through the flowing of water flow during the backwashing of the water flow; and the spiral blades arranged in the metal filter element can also convert the liquid from axial flow to high-speed rotational flow, so that the cleaning effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a dual-switching filter capable of backwashing. Background Technology

[0002] A dual-stage filter, also known as a dual-stage switching filter, consists of two stainless steel filters connected in parallel. It has many advantages, such as novel and reasonable structure, good sealing performance, strong flow capacity, and simple operation. It is a versatile filtration device with a wide range of applications and strong adaptability.

[0003] Chinese Patent No. CN204735006U discloses a dual-switch filter with online backwashing capability, comprising two single-cylinder filters. The inlet of the two single-cylinder filters is connected by a pipe and an inlet three-way valve, the other end of which is connected to the inlet pipe. The outlet of the two single-cylinder filters is connected by a pipe and an outlet three-way valve, the other end of which is connected to the outlet pipe. Each single-cylinder filter includes a filter cartridge and a filter element inside. A drain pipe and a pneumatic drain valve are provided at the bottom of the filter cartridge. The inlet and outlet three-way valves are pneumatic ball valves. An inlet pressure gauge is provided on the inlet pipe. Bypass pipes and bypass pneumatic valves are provided at both ends of the outlet three-way valve. An outlet pressure gauge is provided at the outlet of each of the two single-cylinder filters. A controller is electrically connected to the inlet three-way valve, the outlet three-way valve, the inlet pressure gauge, the bypass pneumatic valve, the two pneumatic drain valves, and the two outlet pressure gauges. This utility model can automatically determine the filter element clogging status, automatically switch between the two filters, and automatically backwash the offline filter.

[0004] However, in the above technical solution, the filter element is cleaned by backwashing with water, but the cleaning effect is poor. Some of the dirt remaining on the outside of the filter cartridge cannot be washed away by the water flow, and a lot of dirt will remain after backwashing. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a dual-switching filter capable of backwashing.

[0006] The technical solution of this utility model is as follows: A dual-stage switching filter capable of backwashing includes two cylindrical bodies arranged in parallel. Each cylindrical body is connected to two vertically parallel connecting pipes, and each connecting pipe on both cylindrical bodies is connected to a three-way ball valve; metal filter elements, the number of which corresponds to the number of cylindrical bodies, are installed inside the cylindrical bodies; a cleaning assembly is connected to the metal filter elements, and the cleaning assembly includes guide rods, sliding seats, cleaning scrapers, and guide vanes. Multiple guide rods are circumferentially distributed around the central axis of the metal filter elements, multiple sliding seats are slidably connected to the guide rods, the cleaning scraper is sleeved on the metal filter elements and connected to the sliding seats, and multiple guide vanes are respectively connected to the cleaning scraper. The guide vanes consist of forward vanes and reverse vanes. The forward vanes are installed at an angle to guide the fluid to flow forward along the axial direction of the metal filter elements, and the reverse vanes are installed at an angle to guide the fluid to flow backward along the axial direction of the metal filter elements. When the cleaning assembly is in use, the water flow pushes the guide vanes and the cleaning scraper, causing the sliding seats to move linearly along the guide rods, and the cleaning scraper contacts the metal filter elements to assist in cleaning.

[0007] Preferably, the metal filter element consists of a frame, a sealed end cap, and an open end cap. The sealed end cap and the open end cap are respectively connected to both ends of the frame, and one end of the open end cap is connected to the cylinder.

[0008] Preferably, the metal filter element is provided with spiral blades connected to the sealed end cap.

[0009] Preferably, the cleaning assembly also includes

[0010] There are two fixed plates arranged symmetrically. The fixed plates are connected to the sealed end cap and the open end cap. The opposite side of the fixed plates is connected to the guide rod.

[0011] Preferably, the sliding seat consists of a sliding block and an annular scraper, with two parallel annular scrapers connected to both ends of the sliding block, and the sliding block slidably connected to the guide rod.

[0012] Preferably, the mounting angle of the forward-facing wing is 30°, and the mounting angle of the reverse-facing wing is 45°.

[0013] Preferably, the cleaning scraper ring consists of a fixed ring body and scraper teeth. The fixed ring body is connected to the sliding seat, and multiple cleaning scraper teeth are connected to the fixed ring body. The cleaning scraper teeth are made of stainless steel and fluororubber.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] In this invention, a cleaning component is provided that can clean the metal filter element. During water backwashing, the flow of water can drive the reverse blades and cleaning scraper ring to move and clean the outer wall of the metal filter element, reducing any residue that may remain in the metal filter element during backwashing. At the same time, the spiral blades set inside the metal filter element can also convert the liquid from axial flow to high-speed swirling flow to enhance the cleaning effect. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 for Figure 1 A cross-sectional view;

[0018] Figure 3 This is a cross-sectional schematic diagram of a metal filter element;

[0019] Figure 4 for Figure 3 Enlarged view of the structure at point A;

[0020] Figure 5 This is a schematic diagram of the cleaning scraper ring structure.

[0021] Reference numerals: 1. Cylinder; 2. Connecting pipe; 3. Three-way ball valve; 4. Metal filter element; 5. Guide rod; 6. Sliding seat; 7. Cleaning scraper ring; 8. Guide vane; 9. Forward vane; 10. Reverse vane; 11. Frame; 12. Sealed end cap; 13. Open end cap; 14. Spiral blade; 15. Fixing plate; 16. Sliding block; 17. Annular scraper; 18. Fixing ring body; 19. Scraper teeth. Detailed Implementation

[0022] Example 1

[0023] like Figures 1-5 As shown, the present invention proposes a backwashable dual-switch filter, comprising a cylinder 1, connecting pipes 2, a three-way ball valve 3, metal filter elements 4, and a cleaning assembly. Two cylinders 1 are arranged in parallel, each cylinder 1 is connected to two vertically parallel connecting pipes 2, and both cylinders 1 are connected to three-way ball valves 3. The pipes and valves are connected by flanges. The number of metal filter elements 4 corresponds to the number of cylinders 1, and the metal filter elements 4 are installed inside the cylinders 1.

[0024] In an optional embodiment, the metal filter element 4 is composed of a frame 11, a sealed end cap 12 and an open end cap 13. The sealed end cap 12 and the open end cap 13 are respectively connected to the two ends of the frame 11, and one end of the open end cap 13 is connected to the cylinder 1.

[0025] In an optional embodiment, the metal filter element 4 is provided with a spiral blade 14 connected to the sealing end cap 12;

[0026] The cleaning assembly is connected to the metal filter element 4. The cleaning assembly includes guide rods 5, sliding seats 6, cleaning scraper rings 7, and guide vanes 8. Multiple guide rods 5 are circumferentially distributed around the central axis of the metal filter element 4. Multiple sliding seats 6 are slidably connected to the guide rods 5. The cleaning scraper ring 7 is sleeved on the metal filter element 4 and connected to the sliding seats 6. Multiple guide vanes 8 are respectively connected to the cleaning scraper ring 7. The guide vanes 8 consist of forward vanes 9 and reverse vanes 10. The forward vanes 9 are installed at an angle to guide the fluid to flow forward along the axial direction of the metal filter element 4, and the reverse vanes 10 are installed at an angle to guide the fluid to flow backward along the axial direction of the metal filter element 4. When the cleaning assembly is in use, the water flow pushes the guide vanes 8 and the cleaning scraper ring 7, causing the sliding seats 6 to move linearly along the guide rods 5. The cleaning scraper ring 7 contacts the metal filter element 4 to assist in its cleaning.

[0027] Example 2

[0028] like Figures 2-5 As shown, the present invention proposes a backwashable dual-switch filter. Compared with Embodiment 1, this embodiment describes the detailed structure of the cleaning component. The cleaning component also includes a fixing plate 15. Two fixing plates 15 are symmetrically arranged. The fixing plates 15 are connected to the sealing end cover 12 and the open end cover 13. The opposing side of the fixing plates 15 is connected to the guide rod 5.

[0029] In an optional embodiment, the sliding seat 6 consists of a sliding block 16 and an annular scraper 17. Two parallel annular scrapers 17 are respectively connected to the two ends of the sliding block 16, and the sliding block 16 is slidably connected to the guide rod 5.

[0030] In one optional embodiment, the mounting angle of the forward-facing wing plate 9 is 30°, and the mounting angle of the reverse-facing wing plate 10 is 45°; the different angles result in different movement speeds when impacted by water flow.

[0031] In an optional embodiment, the cleaning scraper ring 7 consists of a fixed ring body 18 and scraper teeth 19. The fixed ring body 18 is connected to the sliding seat 6, and a plurality of cleaning scraper teeth 19 are connected to the fixed ring body 18. The cleaning scraper teeth 19 are made of stainless steel and fluororubber. Fluororubber can prevent metal scraping from causing damage to the surface of the metal filter element 4.

[0032] In summary, when this utility model is in use, water flows into a cylinder 1 through the three-way ball valve 3 at the bottom. Wastewater enters the metal filter element 4 from the outside through its surface mesh, and then gradually enters the connecting pipe 2 through the open end cap 13 at the top, and is discharged through the three-way ball valve 3 at the top. At this time, the water flow will push the forward wing plate 9 to position the cleaning scraper ring 7 on top of the metal filter element 4. When reverse flushing is required, the three-way ball valve 3 is adjusted to close the inlet and outlet of the current cylinder 1, allowing the other cylinder 1 to operate normally for purification. Inside the cylinder 1 that needs cleaning, water enters from a pipe on one side of the cylinder 1 and flows from top to bottom, in the opposite direction to the purification flow. The water flow pushes the reverse blades 10 on the cleaning scraper ring 7, thereby causing the sliding seat 6 to move along the guide rod 5. The scraper teeth 19 contact the metal filter element 4 to clean it. At the same time, water is sprayed out from the mesh on the metal filter element 4 to clean and prevent clogging. The spiral blades 14 can convert the liquid from axial flow to high-speed swirling flow to enhance the cleaning effect. Impurities and sewage can be discharged from the drain pipe.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A dual-stage switching filter capable of backwashing, characterized in that, include There are two cylinders (1) arranged in parallel. Each cylinder (1) is connected to two vertically parallel connecting pipes (2). Each connecting pipe (2) on the two cylinders (1) is connected to a three-way ball valve (3). Metal filter elements (4) are installed inside the cylinder (1) in a number corresponding to the cylinder (1). A cleaning assembly, connected to the metal filter element (4), includes guide rods (5), sliding seats (6), a cleaning scraper ring (7), and guide vanes (8). Multiple guide rods (5) are circumferentially distributed around the central axis of the metal filter element (4). Multiple sliding seats (6) are slidably connected to the guide rods (5). The cleaning scraper ring (7) is fitted onto the metal filter element (4) and connected to the sliding seats (6). Multiple guide vanes (8) are respectively connected to the cleaning scraper ring (7). The guide vane (8) consists of a forward vane (9) and a reverse vane (10). The forward vane (9) is installed at an angle to guide the fluid to flow in the forward direction along the axis of the metal filter element (4), and the reverse vane (10) is installed at an angle to guide the fluid to flow in the reverse direction along the axis of the metal filter element (4). When the cleaning assembly is in use, the water flow pushes the guide vane (8) and the cleaning scraper (7) to drive the sliding seat (6) to move linearly along the guide rod (5). The cleaning scraper (7) contacts the metal filter element (4) to assist in its cleaning.

2. The backwashable dual-switching filter according to claim 1, characterized in that, The metal filter element (4) consists of a frame (11), a sealed end cap (12) and an open end cap (13). The sealed end cap (12) and the open end cap (13) are respectively connected to the two ends of the frame (11), and one end of the open end cap (13) is connected to the cylinder (1).

3. A backwashable dual-switching filter according to claim 1, characterized in that, The metal filter element (4) is provided with spiral blades (14) connected to the sealing end cap (12).

4. A backwashable dual-switching filter according to claim 1, characterized in that, The cleaning components also include There are two fixed plates (15) symmetrically arranged. The fixed plates (15) are connected to the sealed end cap (12) and the open end cap (13). The fixed plates (15) are connected to the guide rod (5) on the opposite side.

5. A backwashable dual-switching filter according to claim 1, characterized in that, The sliding seat (6) consists of a sliding block (16) and an annular scraper (17). Two parallel annular scrapers (17) are connected to the two ends of the sliding block (16), and the sliding block (16) is slidably connected to the guide rod (5).

6. A backwashable dual-switching filter according to claim 1, characterized in that, The mounting angle of the forward wing (9) is 30°, and the mounting angle of the reverse wing (10) is 45°.

7. A backwashable dual-switching filter according to claim 1, characterized in that, The cleaning scraper ring (7) consists of a fixed ring body (18) and scraper teeth (19). The fixed ring body (18) is connected to the sliding seat (6), and multiple cleaning scraper teeth (19) are connected to the fixed ring body (18). The cleaning scraper teeth (19) are made of stainless steel and fluororubber.

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