Backwash gravel filter
By designing a backwashing device with multiple filter holes in the sand and gravel filter, the problem of small water holes in the bearing plate leading to low backwashing efficiency is solved, and a more efficient backwashing effect is achieved.
Patent Information
- Application Number
- CN202323657529.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2033-12-29
Smart Images
Figure CN222900317U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of filtering devices, and particularly relates to an automatic backwashing sand filter. Background Art
[0002] A sand filter filters water through a sand layer. The irrigation water source moves downward through the pores in the sand layer, isolating impurities above the sand layer. The purified water flows through the sand layer into the water outlet, thus completing the filtration of the irrigation water.
[0003] As impurities continuously accumulate above the sand layer, the sand layer becomes blocked, the water pressure and water flow rate decrease, and the filtering capacity of the sand filter is reduced. Therefore, after the sand filter has been working for a period of time, it is necessary to backwash the sand filter to discharge the accumulated impurities from the sand filter and improve the filtering capacity of the sand filter. When backwashing directly from the bottom of the sand layer, since the water passing holes of the bearing plate supporting the sand layer are relatively small, the backwashing efficiency is low. Utility Model Content
[0004] The purpose of the embodiments of this application is to provide an automatic backwashing sand filter, which can solve the problem that the relatively small water passing holes of the bearing plate supporting the sand layer result in low backwashing efficiency.
[0005] To solve the above technical problems, this application is implemented as follows:
[0006] The embodiments of this application provide an automatic backwashing sand filter, which includes:
[0007] A tank body, which has an accommodation cavity, is provided with a water inlet and a water outlet. The water inlet is located at the top of the tank body, and the water outlet is located at the bottom of the tank body;
[0008] A bearing plate, which is arranged in the accommodation cavity. The bearing plate divides the accommodation cavity into a first accommodation cavity and a second accommodation cavity. The water inlet and the water outlet are respectively located on both sides of the bearing plate, and the bearing plate is provided with mounting holes;
[0009] A backwashing device, which is arranged in the mounting holes and is located in the first accommodation cavity. The backwashing device is provided with a filtering cavity, and the surface of the filtering cavity is provided with filtering holes. The first accommodation cavity is communicated with the second accommodation cavity through the filtering holes;
[0010] A sand layer, which is arranged in the first accommodation cavity.
[0011] In the embodiment of the present application, when filtering irrigation water, the irrigation water can enter the first accommodating cavity from the water inlet. The gravel layer in the first accommodating cavity filters the irrigation water, so that impurities in the irrigation water stay on the upper part of the gravel layer to achieve the purification of the irrigation water. The purified water enters the second accommodating cavity through the filter holes on the backwashing device and flows out from the water outlet. After a period of time, the gravel filter has a reduced filtering capacity due to the deposition of impurities and needs to be flushed. The flushing water flow enters from the water outlet and passes through the filter cavity of the backwashing device into the gravel layer. When the water overflows the gravel layer, the deposited impurities can be washed away and discharged through the water inlet. When flushing the gravel filter, the flushing water flow enters the gravel layer through the filter holes of the filter cavity. Since the area of the filter cavity is relatively large, more filter holes can be provided, which is beneficial for the flushing water flow to quickly enter the gravel layer, thereby improving the backwashing efficiency of the gravel filter. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a partial structural schematic diagram of the backwashing gravel filter disclosed in the embodiment of the present application.
[0013] DESCRIPTION OF REFERENCE NUMERALS:
[0014] 100 - tank body, 110 - accommodating cavity, 111 - first accommodating cavity, 112 - second accommodating cavity, 120 - water inlet, 130 - water outlet;
[0015] 200 - bearing plate;
[0016] 300 - backwashing device, 310 - installation part, 311 - installation base, 312 - fixing part, 320 - filtering part;
[0017] 400 - gravel layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0019] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.
[0020] The following will combine the accompanying drawings and, through specific embodiments and their application scenarios, elaborate in detail on the backwashing sand and gravel filter provided by the embodiments of this application.
[0021] As Figure 1 shown, the embodiments of this application provide a backwashing sand and gravel filter, which includes a tank body 100, a bearing plate 200, a backwashing device 300, and a sand and gravel layer 400.
[0022] The tank body 100 has an accommodation cavity 110. The tank body 100 is provided with a water inlet 120 and a water outlet 130. The water inlet 120 is located at the top of the tank body 100, and the water outlet 130 is located at the bottom of the tank body 100. The bearing plate 200 is arranged in the accommodation cavity 110. The bearing plate 200 divides the accommodation cavity 110 into a first accommodation cavity 111 and a second accommodation cavity 112. The water inlet 120 and the water outlet 130 are respectively located on both sides of the bearing plate 200. The bearing plate 200 is provided with mounting holes. The backwashing device 300 is arranged in the mounting holes, and the backwashing device 300 is located in the first accommodation cavity 111. The backwashing device 300 is provided with a filtering cavity, and the surface of the filtering cavity is provided with filtering holes. The first accommodation cavity 111 is communicated with the second accommodation cavity 112 through the filtering holes. The sand and gravel layer 400 is arranged in the first accommodation cavity 111.
[0023] In the embodiment of the present application, when filtering irrigation water, the irrigation water can enter the first accommodating cavity 111 from the water inlet 120. The gravel layer 400 in the first accommodating cavity 111 filters the irrigation water, so that impurities in the irrigation water stay in the upper part of the gravel layer 400 to achieve the purification of the irrigation water. The purified water enters the second accommodating cavity 112 through the filter holes on the backwashing device 300 and flows out from the water outlet 130. After a period of time, the gravel filter has a reduced filtering capacity due to the deposition of impurities and needs to be flushed. The flushing water flow enters from the water outlet 130 and passes through the filter cavity of the backwashing device 300 into the gravel layer 400. When the water overflows the gravel layer 400, the deposited impurities can be washed away and discharged through the water inlet 120. When flushing the gravel filter, the flushing water flow enters the gravel layer 400 through the filter holes of the filter cavity. Since the area of the filter cavity is large, more filter holes can be provided, so it is beneficial for the flushing water flow to quickly enter the gravel layer 400, thereby improving the backwashing efficiency of the gravel filter.
[0024] The backwashing device 300 includes a connected installation part 310 and a filtering part 320. The installation part 310 extends in a direction away from the filtering part 320, and the installation part 310 is arranged in the installation hole. The filtering part 320 is provided with a filter cavity. The installation part 310 is beneficial for installing the backwashing device 300 in the installation hole.
[0025] The outer surface of the filtering part 320 is spherical. The flushing water flow enters the filter cavity and then enters the gravel layer 400 through the filter holes. The filter holes on the filtering part 320 facilitate the spread of the flushing water flow. The filtering part 320 can be a flat spherical structure with a reduced height-width ratio and a fully open seam on the top surface, which is beneficial for widening the filter seam and increasing the number of filter holes, so that the total water passing area increases. The water passing streamline of the filtering part 320 of this structure is smoother and more uniform, the flow distance of the water passing through the filtering part 320 is reduced, and the vortices formed by the water flow during backwashing are smaller and denser, which helps to increase the turnover frequency of the gravel layer 400, facilitate the shedding and discharge of impurities, and greatly improve the backwashing efficiency.
[0026] The installation part 310 includes a connected installation base 311 and a fixing part 312. The installation base 311 is located in the first accommodating cavity 111 and is connected to the filtering part 320. The fixing part 312 passes through the installation hole. The fixing part 312 can realize the firm installation of the backwashing device 300. The fixing part 312 adopts a socket outlet, which is more convenient for installation and maintenance.
[0027] The backwashing gravel filter further includes a sealing member. The sealing member is sleeved on the fixing part 312 and is located between the bearing plate 200 and the installation base 311. The sealing member can improve the sealing performance and fastening performance of the installation of the installation base 311, and prevent the flushing water flow from impacting the backwashing device 300 and causing the backwashing device 300 to shake.
[0028] In the direction away from the bearing plate 200, the size of the filtering part 320 gradually decreases, which is beneficial to reducing the occupied space of the backwashing device 300 and increasing the volume of the sand and gravel layer 400.
[0029] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.
Claims
1. An anti-backwashing sand and gravel filter, characterized in that, it includes: a tank body (100), the tank body (100) has an accommodation cavity (110), the tank body (100) is provided with a water inlet (120) and a water outlet (130), the water inlet (120) is located at the top of the tank body (100), and the water outlet (130) is located at the bottom of the tank body (100); a bearing plate (200), the bearing plate (200) is arranged in the accommodation cavity (110), the bearing plate (200) divides the accommodation cavity (110) into a first accommodation cavity (111) and a second accommodation cavity (112), the water inlet (120) and the water outlet (130) are respectively located on both sides of the bearing plate (200), and the bearing plate (200) is provided with mounting holes; an anti-backwashing device (300), the anti-backwashing device (300) is arranged in the mounting holes, and the anti-backwashing device (300) is located in the first accommodation cavity (111), the anti-backwashing device (300) is provided with a filtering cavity, the surface of the filtering cavity is provided with filtering holes, and the first accommodation cavity (111) is communicated with the second accommodation cavity (112) through the filtering holes; a sand and gravel layer (400), the sand and gravel layer (400) is arranged in the first accommodation cavity (111).
2. The anti-backwashing sand and gravel filter according to claim 1, characterized in that, the anti-backwashing device (300) includes a connected mounting part (310) and a filtering part (320), the mounting part (310) extends in a direction away from the filtering part (320), and the mounting part (310) is arranged in the mounting holes, and the filtering part (320) is provided with the filtering cavity.
3. The anti-backwashing sand and gravel filter according to claim 2, characterized in that, the outer surface of the filtering part (320) is a spherical surface.
4. The anti-backwashing sand and gravel filter according to claim 2, characterized in that, the mounting part (310) includes a connected mounting base (311) and a fixing part (312), the mounting base (311) is located in the first accommodation cavity (111), and the mounting base (311) is connected to the filtering part (320), and the fixing part (312) passes through the mounting holes.
5. The anti-backwashing sand and gravel filter according to claim 4, characterized in that, the anti-backwashing sand and gravel filter further includes a sealing member, the sealing member is sleeved on the fixing part (312), and the sealing member is located between the bearing plate (200) and the mounting base (311).
6. The anti-backwashing sand and gravel filter according to claim 2, characterized in that, in a direction away from the bearing plate (200), the size of the filtering part (320) gradually decreases.