Automatic backwashing filter

Abstract

The utility model provides an automatic backwashing filter and belongs to the technical field of filters. Comprising a first filtering barrel, a second filtering barrel is arranged on one side of the first filtering barrel, an inlet and an outlet of the first filtering barrel are communicated with an inlet and an outlet of the second filtering barrel through a tee joint, a tee joint control valve is arranged on the tee joint, and a filtering net and an anti-backflow assembly arranged on one side of the filtering net are arranged in the first filtering barrel; hollow rods are symmetrically arranged on the side wall, away from the filter screen, of the hollow supporting plate, sliding plates are slidably connected into the hollow rods, connecting rods penetrating through the hollow supporting plate are arranged on one side wall of each sliding plate, and a baffle disc is arranged between the ends of the connecting rods. According to the utility model, the flow conveying work of a medium is not stopped in the backwashing process, so that the use effect is greatly improved; and during backwashing, the medium is blocked by the baffle disc through the anti-backflow assembly, so that the phenomenon that part of impurities reversely flow back and precipitate instead of flowing out of the drain outlet during backwashing is avoided, and the backwashing effect is effectively enhanced.

Description

Technical Field

[0001] The utility model provides an automatic backwashing filter, belonging to the technical field of filters. Background Art

[0002] The filter is an indispensable device on the medium conveying pipeline, usually installed at the inlet end of the pressure reducing valve, pressure relief valve, constant water level valve, and other equipment of Fanggong filter. After the water to be treated passes through the filter cartridge of the filter mesh, its impurities are blocked, thereby treating and filtering the water.

[0003] Application No. CN202222231291.8 discloses an automatic backwash filter, specifically relating to the technical field of filters, comprising an outer filter frame, wherein a first cover frame is fixedly installed on one side of the outer filter frame by screws, and a first valve is fixedly installed on the side of the first cover frame away from the outer filter frame. The utility model discloses that when backwashing is needed after filtering for a period of time, the first valve and the fourth valve are controlled to be closed, the second valve and the third valve are opened, and the sealing cover is rotated to open the drain pipe, so that water enters the outer filter frame in the opposite direction through the water inlet pipe, the tee pipe, the second connecting pipe, the first connecting pipe, and the second cover frame, and the impurities on the side of the filter screen frame close to the first cover frame are backwashed from the filter screen frame through the filter screen frame in the inner filter frame. The impurities are separated from the filter screen frame and discharged through the drain pipe, thereby realizing automatic backwashing of the filter screen frame, which is more convenient than traditional disassembly of the first cover frame, the second cover frame and the filter screen frame for manual cleaning.

[0004] Based on the above search and combined with the existing technology, it was found that during the backwashing process, some impurities may not flow out from the sewage outlet but flow back and settle, and the backwashing effect needs to be improved; and it is usually difficult to continue to flow and transport the medium during backwashing, and the use effect needs to be improved.

[0005] Based on this, the utility model provides an automatic backwashing filter. Utility Model Content

[0006] The technical problems solved by the utility model are: some impurities may not flow out from the sewage outlet but flow back and settle, and the backwashing effect needs to be improved; it is difficult to continue to transport the medium during backwashing, and the use effect needs to be improved.

[0007] In order to solve the technical problem, the technical solution provided by the utility model is: an automatic backwash filter, including a filter barrel 1, a filter barrel 2 is provided on one side of the filter barrel 1, the inlet and outlet of the filter barrel 1 and the filter barrel 2 are connected by a tee, and a three-way control valve is provided on the tee. A filter screen and an anti-backflow component are provided in the filter barrel 1 on one side of the filter screen, and the anti-backflow component includes a hollow support plate, and hollow rods are symmetrically provided on the side wall of the hollow support plate away from the filter screen, and a slide is slidably connected to the hollow rod, and a connecting rod is provided on one side wall of the slide that passes through the hollow support plate, and a baffle is provided between the ends of the connecting rod.

[0008] Furthermore, a return spring equipped with a damper is provided between the inner side wall of the hollow rod and the other side wall of the slide plate.

[0009] Furthermore, the structure of filter barrel 1 is the same as that of filter barrel 2, the anti-backflow component is close to the inlet side of filter barrel 1, and the bottom of filter barrel 1 is provided with a sewage outlet placed between the filter screen and the anti-backflow component, and the sewage outlet is provided with a sewage control valve.

[0010] Furthermore, the tee is connected to the first filter barrel via a first delivery pipe, and the tee is connected to the second filter barrel via a second delivery pipe.

[0011] Furthermore, the hollow support plate is fixedly arranged on an inner wall of the filter barrel, and the inner wall of the hollow rod is symmetrically provided with a limiting rail that matches the side wall of the slide plate.

[0012] Beneficial effects of the utility model:

[0013] 1. Adjust the three-way control valves on both sides according to the needs of use, so that the flow of the medium can be continuously transported during the backwash process, which greatly improves the use effect;

[0014] 2. During backwashing, the impurities retained on the filter screen are washed away by the backflow prevention component and flow with the medium. At this time, the medium is blocked by the baffle, so that the impurities will not be backwashed into the tee near the water inlet pipe, and can flow out directly from the sewage outlet, so as to avoid some impurities not flowing out from the sewage outlet during backwashing but flowing back and settling, effectively enhancing the backwashing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an automatic backwash filter in this utility model. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure of an automatic backwash filter in this utility model. Figure 2 .

[0017] Figure 3It is a plan view of an automatic backwash filter of the utility model.

[0018] Figure 4 This is a partial enlarged view of an automatic backwash filter of the utility model.

[0019] Figure 5 The utility model is a schematic diagram of the structure of an anti-backflow component of an automatic backwash filter.

[0020] 1. Filter barrel 1; 2. Filter barrel 2; 3. Tee; 4. Filter screen; 5. Three-way control valve; 6. Anti-backflow assembly; 7. Hollow support plate; 8. Hollow rod; 9. Slide plate; 10. Connecting rod; 11. Baffle plate; 12. Return spring; 13. Sewage outlet; 14. Sewage control valve; 15. Delivery pipe 1; 16. Delivery pipe 2; 17. Limit rail. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] According to the attached Figure 1 、 23: The utility model provides an automatic backwash filter: including a filter barrel 1, a filter barrel 2 is provided on one side of the filter barrel 1, the inlet and outlet of the filter barrel 1 and the filter barrel 2 are connected through a tee 3, a three-way control valve 5 is provided on the tee 3, a filter screen 4 is provided in the filter barrel 1, the tee 3 and the filter barrel 1 are connected through a delivery pipe 15, and the tee 3 and the filter barrel 2 are connected through a delivery pipe 2 16. The filter barrel 1 and the filter barrel 2 have the same structure and can prevent backflow. The component 6 is close to the inlet side of the filter barrel 1. The bottom of the filter barrel 1 is provided with a sewage outlet 13 placed between the filter screen 4 and the anti-backflow component 6. The sewage outlet 13 is provided with a sewage control valve 14. The tee 3 near the inlet of the filter barrel 1 is connected to the external water inlet pipe, and the tee 3 near the outlet of the filter barrel 1 is connected to the external water outlet pipe. By adjusting the three-way control valves 5 on both sides, the water inlet pipe, the water outlet pipe and the delivery pipe 15 are connected, and then the medium is transported from the water inlet pipe, the tee 3 and the delivery pipe 15 to the filter barrel 1. , after being filtered by the filter screen 4, it flows into the outlet pipe from the other side of the delivery pipe 15 and the tee 3 to achieve the filtration of the water. When the multi-filter needs to be backwashed after a period of use, the three-way control valves 5 on both sides are adjusted to make the water inlet pipe connected to the adjacent delivery pipe 2 16, and the water outlet pipe is connected to the delivery pipe 1 15 and the delivery pipe 2 16. Then the medium is transported from the water inlet pipe, the tee 3, and the delivery pipe 2 16 to the filter barrel 2 2, and after being filtered by the filter screen 4, it flows out from the delivery pipe 2 1 on the other side. 6. The water flows from the three-way valve 3 into the outlet pipe and the delivery pipe 15, thereby filtering the water. The medium flows back through the delivery pipe 15 to the filter barrel 1, and then backwashes the filter screen 4, so that the impurities retained on the filter screen 4 are washed away and flow out of the sewage outlet along with the medium. After a period of time, the three-way control valve 5 is adjusted so that the outlet pipe is only connected to the delivery pipe 2 16, and the backwashing work is ended. This process can achieve the flow and transportation of the medium without stopping during the backwashing process, and the use effect is greatly improved.

[0023] According to the attached Figure 3 、 4As shown in Figure 5: the filter barrel 1 is provided with an anti-backflow component 6 arranged on one side of the filter screen 4, the anti-backflow component 6 includes a hollow support plate 7, and a hollow rod 8 is symmetrically provided on the side wall of the hollow support plate 7 away from the filter screen 4. A slide plate 9 is slidably connected in the hollow rod 8, and a connecting rod 10 is provided on one side wall of the slide plate 9 passing through the hollow support plate 7. A baffle 11 is provided between the ends of the connecting rod 10, and a return spring 12 equipped with a damper is provided between the inner wall of the hollow rod 8 and the other side wall of the slide plate 9. The hollow support plate 7 is fixedly arranged on the inner wall of the filter barrel 1, and a limiting rail 17 matching the side wall of the slide plate 9 is symmetrically provided on the inner wall of the hollow rod 8, which plays a limiting role. When the liquid medium flows from the filter barrel 1 through the anti-backflow component 6, the liquid medium will impact the baffle 11, causing the baffle 11 to move toward the direction close to the filter screen 4, and the return spring 12 is stretched by force, thereby causing the liquid medium to flow along the baffle 11 around the channel in the middle of the hollow support plate 7, and then be discharged after being filtered by the filter screen 4.

[0024] Principle of the utility model

[0025] During use, the three-way control valves 5 on both sides are adjusted according to the needs of use, so that the flow and delivery of the medium can be carried out without stopping during the backwashing process, and the use effect is greatly improved. Through the anti-backflow component 6, when backwashing is carried out, the return spring 12 in the stretched state rebounds and resets, so that the baffle 11 reverses and restores to the initial state of blocking the middle channel of the hollow support plate 7. The impurities retained on the filter screen 4 are washed away and flow with the medium. At this time, the medium is blocked by the baffle 11, so that the impurities will not be backwashed into the tee near the water inlet pipe, and can flow out directly from the sewage outlet, so as to avoid some impurities not flowing out from the sewage outlet during backwashing but flowing back and settling, effectively enhancing the backwashing effect.

[0026] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. An automatic backwash filter, comprising a filter barrel (1), characterized in that: A filter barrel 2 (2) is provided on one side of the filter barrel 1 (1), and the inlets and outlets of the filter barrel 1 (1) and the filter barrel 2 (2) are both connected via a three-way connection (3), and a three-way control valve (5) is provided on the three-way connection (3). A filter screen (4) and an anti-backflow component (6) are provided in the filter barrel 1 (1), and the anti-backflow component (6) is provided on one side of the filter screen (4). The anti-backflow component (6) includes a hollow support plate (7), and a hollow rod (8) is symmetrically provided on the side wall of the hollow support plate (7) away from the filter screen (4). A slide plate (9) is slidably connected in the hollow rod (8), and a connecting rod (10) passing through the hollow support plate (7) is provided on one side wall of the slide plate (9), and a baffle (11) is provided between the ends of the connecting rod (10).

2. An automatic backwash filter according to claim 1, characterized in that: A return spring (12) equipped with a damper is provided between the inner side wall of the hollow rod (8) and the other side wall of the slide plate (9).

3. The automatic backwash filter according to claim 1, characterized in that: The structure of the filter barrel 1 (1) and the filter barrel 2 (2) is the same. The anti-backflow component (6) is close to the inlet side of the filter barrel 1 (1). The bottom of the filter barrel 1 (1) is provided with a sewage outlet (13) placed between the filter screen (4) and the anti-backflow component (6). The sewage outlet (13) is provided with a sewage control valve (14).

4. The automatic backwash filter according to claim 1, characterized in that: The three-way connection (3) is connected to the first filter barrel (1) via a first delivery pipe (15), and the three-way connection (3) is connected to the second filter barrel (2) via a second delivery pipe (16).

5. The automatic backwash filter according to claim 1, characterized in that: The hollow support plate (7) is fixedly arranged on the inner wall of the filter barrel (1), and the inner wall of the hollow rod (8) is symmetrically provided with a limiting rail (17) that matches the side wall of the slide plate (9).

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