Device for preventing filter backwashing sand leakage
By setting up an alternating side plate and connecting plate structure inside the filter tank, the filter media is prevented from entering the inlet channel, thus solving the problem of sand loss during backwashing of the filter tank. This achieves effective return of the filter media and maintenance of filtration efficiency, thereby reducing operating costs.
Patent Information
- Application Number
- CN202520539813.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-25
AI Technical Summary
During the backwashing process of the filter bed, the filter media (such as quartz sand, activated carbon, etc.) are easily lost, which affects water quality and filtration efficiency, increases equipment maintenance costs, and undermines system stability.
Design a device to prevent sand loss during backwashing of a filter bed, including two rows of vertical side plates and connecting plates arranged inside the weir plate. The side plates are staggered to form a gap-free structure to prevent filter media from entering the inlet channel and ensure that the filter media falls back into the filter bed.
It effectively prevents filter media loss, maintains the filtration efficiency of the filter bed, extends the service life of the filter media, and reduces operating costs.
Smart Images
Figure CN223930780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filter technology, specifically to a device for preventing sand loss during filter backwashing. Background Technology
[0002] Preventing sand loss during filter backwashing is a crucial issue in filter operation and management. Sand loss not only affects water quality and filtration efficiency but also increases equipment maintenance costs, disrupts system stability, and may even lead to substandard effluent quality. Through proper design, maintenance, and operation, sand loss can be effectively reduced, ensuring efficient operation of the filter system and meeting water quality standards.
[0003] In summary, this utility model designs a device to prevent sand loss during filter backwashing. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device to prevent sand loss during filter backwashing. It can effectively prevent the loss of filter media (such as quartz sand, activated carbon, etc.) during backwashing, maintain the filtration efficiency of the filter, thereby extending the service life of the filter media and reducing the operating cost of the filter.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a device for preventing sand runoff during backwashing of a filter bed, comprising a device body, the device body being disposed inside a weir plate, an inlet channel being disposed outside the weir plate, and a filter media layer being disposed below the device body. The device body includes two rows of side plates vertically disposed on both sides of the filter bed, the side plates being fixedly connected by three connecting plates, and the two rows of side plates being arranged in an alternating and uninterrupted manner.
[0006] Preferably, the side plate is arranged perpendicular to the connecting plate.
[0007] Preferably, the side plates are arranged vertically in parallel, and the connecting plates are arranged horizontally in parallel.
[0008] During backwashing of the filter bed in this invention, the filter media (such as quartz sand, activated carbon, etc.) carried by the backwash water are blocked by the side plates arranged in an alternating and uninterrupted manner on both sides of the device that prevents sand from being washed away during backwashing, before the backwash water enters the inlet channel. The filter media then falls back into the filter bed, while the backwash water can flow normally through and be discharged into the inlet channel.
[0009] The beneficial effects of this utility model are: the structure of this utility model is simple and the design is reasonable. It can effectively prevent the loss of filter media (such as quartz sand, activated carbon, etc.) during backwashing, maintain the filtration efficiency of the filter bed, thereby extending the service life of the filter media and reducing the operating cost of the filter bed. Attached Figure Description
[0010] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;
[0011] Figure 1 This is a schematic diagram of the filter bed of this utility model;
[0012] Figure 2 This is a cross-sectional view of the filter bed of this utility model;
[0013] Figure 3 for Figure 1 Enlarged schematic diagram of part A;
[0014] Figure 4 for Figure 2 Enlarged schematic diagram of part C. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0016] Reference Figure 1-4 The specific embodiment adopts the following technical solution: a device for preventing sand loss during backwashing of a filter bed, including a device body 1, the device body 1 is set inside the weir plate 4, the weir plate 4 is provided with an inlet channel 5 outside the weir plate 4, and the bottom of the device body 1 is a filter media layer 6. The device body 1 includes two rows of side plates 2 vertically arranged on both sides of the filter bed B. The side plates 2 are fixedly connected by three connecting plates 3. The two rows of side plates 2 are staggered and arranged without gaps.
[0017] It is worth noting that the side plate 2 is perpendicular to the connecting plate 3.
[0018] In addition, the side plates 2 are arranged vertically in parallel, and the connecting plates 3 are arranged horizontally in parallel.
[0019] In this specific embodiment, the anti-sand-flow device is vertically installed at the edge of the filter tank. The side plates on both sides are staggered and without gaps. When the backwash water carries the filter media towards the inlet channel, it is first blocked by the inner baffle and then sinks into the filter tank, thus preventing it from being carried into the inlet channel 4 by the backwash water. If the inner baffle fails to block it, the backwash water carries the filter media to the outer baffle. At this point, the water flow weakens, and the filter media is blocked by the outer baffle (which is staggered with the inner baffle) and falls into the filter tank. Therefore, the entire device effectively prevents sand-flow.
[0020] In this specific embodiment, the filter media (quartz sand) carried by the backwash water is blocked by a device that prevents sand from escaping during backwashing before it enters the inlet channel and is discharged from the filter tank, and returns to the filter tank. The baffles on both sides are staggered and closely arranged without gaps, reducing the obstruction to the water flow while effectively intercepting the filter media.
[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A device for preventing sand loss during filter backwashing, characterized in that, The device includes a main body (1), which is located inside the weir plate (4). An inlet channel (5) is provided on the outside of the weir plate (4). Below the main body (1) is a filter media layer (6). The main body (1) includes two rows of side plates (2) vertically arranged on both sides of the filter tank (B). The side plates (2) are fixedly connected by three connecting plates (3). The two rows of side plates (2) are staggered and arranged without gaps.
2. The device for preventing sand loss during filter backwashing according to claim 1, characterized in that, The side plate (2) is perpendicular to the connecting plate (3).
3. The device for preventing sand loss during filter backwashing according to claim 1, characterized in that, The side plates (2) are arranged vertically in parallel, and the connecting plates (3) are arranged horizontally in parallel.