A filter screen type pre-filter with large pollution space and self-settling deposit anti-backflow

Abstract

The utility model relates to a filter screen type backwash prefilter with big pollution space and self-settling deposit anti-reflux, including head, filter bottle and filter core framework, filter element and blowdown mechanism, still including backwash framework and backwash filter element and adjusting mechanism, filter element adopts filter screen type filter element, backwash framework can be axially moved relative to filter core framework, and is equipped with blowdown mechanism at the end of filter core framework, the blowdown mechanism includes pollution absorbing unit and anti-reflux unit, and the pollution absorbing unit includes pollution absorbing casing and pollution absorbing cavity, and the anti-reflux unit includes anti-reflux casing and anti-reflux cavity, and the pollution absorbing cavity and anti-reflux cavity are relatively fixed and set, the pollution absorbing cavity is equipped with at least one pollution inlet, and at least one blocking element is arranged on the communication path of pollution inlet and pollution absorbing cavity, and the anti-reflux cavity is equipped with at least one blowdown port. Significantly improve the cleaning effect of filter core, can improve the service life of filter core, and the quality of water filtration is greatly guaranteed.

Description

Technical Field

[0001] This utility model relates to a filter-type backwashing pre-filter with a large dirt-holding space and self-settling and anti-backflow features, belonging to the technical field of water purification equipment. Background Technology

[0002] Municipal tap water suffers from secondary pollution such as pipe corrosion and sediment, leading to deterioration of household water quality. Pre-filters are typically installed on the inlet pipes to improve water quality. Currently, most pre-filter cartridges on the market are mesh-type. Cleaning methods include forward rinsing, backwashing, siphon cleaning, or brushing. The limitation of mesh-type filters lies in their inherent flaws in the wastewater discharge structure, such as small dirt-holding space, making it difficult to thoroughly clean the cartridge. Automatic rinsing or brushing further exacerbates this, as impurities can easily flow back into the filter bottle, hindering the cleaning effect, shortening the cartridge's lifespan, and compromising the water filtration quality. The short lifespan of mesh-type filter cartridges also results in high operating costs for users.

[0003] Therefore, it is necessary to design a structure suitable for a mesh-type backwashing pre-filter that can confine the impurities that have settled, been washed or flushed down through a certain space or element, preventing the impurities from repeatedly flowing into the filter bottle. The researchers of this application, through structural optimization design and experimental simulation, have developed a backwashing pre-filter with a large dirt-holding space and the ability to effectively prevent the backflow of impurities. It has achieved good results, significantly improved the cleaning effect of the filter element, extended the service life of the filter element, and greatly ensured the quality of water filtration. Utility Model Content

[0004] One of the objectives of this invention is to address the shortcomings of existing pre-filters by providing a filter-type backwashing pre-filter with a large dirt-holding capacity and a self-settling, anti-backflow filter element. The filter element is optimized, the dirt-holding capacity at the discharge end is expanded, and the design of the backflow element prevents sedimented or rinsed impurities from flowing back into the filter bottle, ensuring the effectiveness of each cleaning. At the filtration end, by incorporating one or more of the following structures—a vortex channel, an impeller, and a water flow directional hood—the water flow turbulence is accelerated, which is beneficial for impurity sedimentation and precipitation. In summary, this pre-filter, through structural optimization design and experimental simulation, has achieved excellent results, significantly improving the cleaning effect of the filter element, extending its service life, and greatly ensuring the quality of water filtration.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A pre-filter with a large dirt-holding capacity and self-settling backflow prevention features, including a head, filter bottle, filter element frame, filter element sleeved on the filter element frame, and a drain mechanism located at the end of the filter element frame, further including a backwash frame coaxially inserted into the filter element frame, a backwash filter element sleeved at the end of the backwash frame, and an adjustment mechanism located between the backwash frame and the filter element frame. The filter element is a mesh filter element, and the backwash frame is axially movable relative to the filter element frame. The drain mechanism includes a dirt-holding unit and an anti-backflow unit. The dirt-holding unit includes a dirt-holding shell and a dirt-holding cavity, and the anti-backflow unit includes an anti-backflow shell and an anti-backflow cavity. The dirt-holding cavity and the anti-backflow cavity are fixedly arranged relative to each other. The dirt-holding cavity has at least one dirt inlet. At least one baffle element is provided on the communication path between the dirt inlet and the dirt-holding cavity to prevent impurities in the dirt-holding cavity from flowing back to the dirt inlet. The anti-backflow cavity has at least one drain outlet.

[0007] Preferably, the filter element frame has a spiral water inlet channel at the water inlet end, and / or an impeller is provided on the lower side of the water inlet channel, and / or a filter element cover is sleeved on the lower side of the impeller, and the outer side of the filter element cover has several spiral channels circumferentially arranged.

[0008] Preferably, the sludge-collecting housing includes a housing cover, an upper cover edge extending axially upward from the housing cover, a lower cover edge extending axially downward from the housing cover, the inner cavity of the lower cover edge forming a sludge-collecting cavity, the circumferential connection of the upper cover edge being able to be circumferentially sealed with the pre-filter, and the sludge inlet being located on the housing cover.

[0009] Preferably, the shell cover has a circumferentially connected inlet for dirt inflow, and a plurality of baffle elements are provided, which are staggered in the inlet for dirt inflow. The gap between the baffle elements forms the inlet for dirt inflow. The baffle elements are inclined or have a blocking part to allow impurities to flow in the forward direction and prevent reverse flow.

[0010] Preferably, the baffle element is a blade, which is inclined from the inlet end of the inlet gap to the outlet end.

[0011] Preferably, the blades are arranged in a spiral inclined distribution along the sewage inlet, and the anti-backflow cavity is funnel-shaped.

[0012] Preferably, the contaminant housing has an assembly shaft or assembly shaft cavity that extends axially upward from its center, forming an assembly part.

[0013] Preferably, the drain outlets are radial, with the size of the drain outlets closer to the axis of the anti-backflow cavity being smaller than that of the drain outlets farther from the axis of the backflow cavity, so as to achieve graded and staggered discharge of impurities of different sizes.

[0014] Preferably, the sewage discharge mechanism is further fixedly provided with a sedimentation element downstream of the sewage outlet of the anti-backflow cavity. The sedimentation element includes a sedimentation shell and a sedimentation cavity. The sewage receiving unit, the anti-backflow unit, and the sedimentation element are all made of transparent material, which facilitates observation of the sewage discharge status through the filter bottle. The filter element and the backwash filter element are respectively a filter screen type or a filter screen type. The upper cover has a sealing structure in the circumferential direction. The sealing structure is a sealing groove and / or a sealing strip.

[0015] Preferably, the machine head is provided with an isolation bushing that can isolate the machine head from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle is also provided with a water hammer structure, and the backwash frame is also fitted with a swirl spray component.

[0016] The beneficial effects of this utility model are as follows: This filter-type backwashing pre-filter, featuring a large dirt-holding capacity and a self-falling sedimentation and anti-backflow discharge mechanism, has achieved excellent results through structural optimization and experimental simulation. It significantly improves the cleaning effect of the filter element, extends its service life, and greatly ensures the quality of water filtration. The optimized filter element expands the dirt-holding capacity at the discharge end, and the design of the backflow element prevents sedimented or rinsed impurities from flowing back into the filter bottle, ensuring the effectiveness of each cleaning. At the filtration end, by incorporating one or more of the following structures—a vortex channel, an impeller, and a water flow directional hood—the water flow turbulence is accelerated, which is beneficial for impurity sedimentation and precipitation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0019] Figure 3 This is a schematic diagram of a sewage discharge structure with a large sewage holding capacity and self-settling and backflow prevention features;

[0020] Figure 4 yes Figure 3 A partial schematic diagram;

[0021] Figure 5 This is a cross-sectional view of the pre-filter (filtering status);

[0022] Figure 6 This is a cross-sectional view of the pre-filter (drainage state).

[0023] In the diagram: 1. Sludge receiving unit, 2. Anti-backflow unit, 3. Baffle element, 4. Assembly part, 5. Sludge inlet, 6. Sludge outlet, 7. Sedimentation element, 8. Spiral water inlet channel, 9. Impeller, 10. Filter element cover, A. Filter element frame, B. Adjustment mechanism, C. Backwash frame, C1. Backwash drive shaft, D. Filter element, E. Spray nozzle. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0025] Example:

[0026] like Figure 1-6 As shown, a pre-filter with a large dirt-holding capacity and self-settling to prevent backflow, a mesh-type backwashing filter, includes a head, a filter bottle, and a filter element frame A, a filter element D fitted onto the filter element frame A, and a drain mechanism located at the end of the filter element frame A. It also includes a backwash frame C coaxially inserted into the filter element frame A, a backwashing filter element D fitted onto the end of the backwash frame C, and an adjustment mechanism B located between the backwash frame C and the filter element frame A. The filter element D is a mesh-type filter element, and the backwash frame C is axially movable relative to the filter element frame A. The drain mechanism... The system includes a dirt-collecting unit 1 and an anti-backflow unit 2. The dirt-collecting unit 1 includes a dirt-collecting shell and a dirt-collecting cavity, and the anti-backflow unit 2 includes an anti-backflow shell and an anti-backflow cavity. The dirt-collecting cavity and the anti-backflow cavity are fixedly arranged relative to each other. The dirt-collecting cavity is provided with at least one dirt inlet 5. At least one baffle element 3 is provided on the communication path between the dirt inlet 5 and the dirt-collecting cavity to prevent impurities in the dirt-collecting cavity from flowing back to the dirt inlet 5. The anti-backflow cavity is provided with at least one drain outlet 6. The dirt-collecting shell is also provided with an assembly part 4 for connecting with the backwash drive shaft C1 of the backwash frame C.

[0027] In this embodiment, the water inlet end of the filter element frame A is provided with a spiral water inlet channel 8, and / or an impeller 9 is provided on the lower side of the water inlet channel 8, and / or a filter element cover 10 is sleeved on the lower side of the impeller 9, and the outer circumferential side of the filter element cover 10 is provided with several spiral channels.

[0028] In this embodiment, the filth-collecting housing includes a housing cover, an upper cover edge extending upward from the housing cover axially, a lower cover edge extending downward from the housing cover axially, the inner cavity of the lower cover edge forming a filth-collecting cavity, the circumferential connection of the upper cover edge to the circumferential connection of the pre-filter, and the filth inlet located on the housing cover.

[0029] In this embodiment, the shell cover is provided with a connected inlet for dirt in the circumference. A plurality of baffle elements 3 are provided and are staggered in the inlet for dirt in the inlet for dirt in the gap between the baffle elements 3 to form the inlet for dirt in the inlet. The baffle elements 3 are provided at an angle or with a blocking part to allow impurities to flow in the forward direction and prevent reverse flow.

[0030] In this embodiment, the baffle element 3 is a blade, which is inclined from the inlet end of the inlet gap to the outlet end.

[0031] In this embodiment, the blades are arranged in a spiral-shaped inclined distribution along the sewage inlet, and the anti-backflow cavity is funnel-shaped.

[0032] In this embodiment, the center of the dirt-collecting shell is axially extended upward and fixedly provided with an assembly shaft or an assembly shaft cavity, forming an assembly part 4.

[0033] In this embodiment, the drain outlet 6 is radial, and the size of the drain outlet near the axis of the anti-backflow cavity is smaller than that of the drain outlet far from the axis of the backflow cavity, so as to achieve graded and staggered discharge of impurities of different sizes.

[0034] In this embodiment, a sedimentation element 7 is fixedly provided downstream of the sewage outlet 6 of the anti-backflow cavity in the sewage discharge mechanism. The sedimentation element 7 includes a sedimentation shell and a sedimentation cavity. The sewage receiving unit 1, the anti-backflow unit 2 and the sedimentation element 7 are all made of transparent materials, which makes it easy to observe the sewage discharge status through the filter bottle.

[0035] In this embodiment, the filter element and the backwash filter element are respectively a filter screen type or a filter screen type. The upper cover edge is provided with a sealing structure in the circumferential direction. The sealing structure is a sealing groove and / or a sealing strip.

[0036] In this embodiment, the machine head is provided with an isolation bushing that can isolate the machine head from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle, specifically located inside the filter element skeleton, is provided with a water hammer structure. The backwashing skeleton is also fitted with a swirl spray component.

[0037] The beneficial effects of this utility model are as follows: This filter-type backwashing pre-filter, featuring a large dirt-holding capacity and a self-falling sedimentation and anti-backflow discharge mechanism, has achieved excellent results through structural optimization and experimental simulation. It significantly improves the cleaning effect of the filter element, extends its service life, and greatly ensures the quality of water filtration. The optimized filter element expands the dirt-holding capacity at the discharge end, and the design of the backflow element prevents sedimented or rinsed impurities from flowing back into the filter bottle, ensuring the effectiveness of each cleaning. At the filtration end, the inclusion of one or more structures such as a vortex channel, impeller, and water flow directional hood accelerates water flow turbulence, facilitating impurity sedimentation and precipitation. The above-described embodiments are merely preferred solutions of this utility model and are not intended to limit the utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A pre-filter with a large dirt-holding capacity and self-settling to prevent backflow, comprising a head, a filter bottle, and a filter element frame (A), a filter element (D) sleeved on the filter element frame (A), and a drain mechanism located at the end of the filter element frame (A), further comprising a backwash frame (C) coaxially inserted into the filter element frame (A), a backwash filter element (D) sleeved at the end of the backwash frame (C), and an adjustment mechanism (B) located between the backwash frame (C) and the filter element frame (A), wherein the filter element (D) is a mesh filter element, and the backwash frame (C) is axially movable relative to the filter element frame (A), characterized in that: The sewage discharge mechanism includes a sewage receiving unit (1) and an anti-backflow unit (2). The sewage receiving unit (1) includes a sewage receiving shell and a sewage receiving cavity. The anti-backflow unit (2) includes an anti-backflow shell and an anti-backflow cavity. The sewage receiving cavity and the anti-backflow cavity are fixedly arranged relative to each other. The sewage receiving cavity is provided with at least one sewage inlet (5). At least one baffle element (3) is provided on the communication path between the sewage inlet (5) and the sewage receiving cavity to prevent impurities in the sewage receiving cavity from flowing back to the sewage inlet (5). The anti-backflow cavity is provided with at least one sewage outlet (6). The sewage receiving shell is also provided with an assembly part (4) for connecting with the backwash drive shaft of the backwash frame (C).

2. The pre-filter with a large dirt-holding capacity and self-settling to prevent backflow, as described in claim 1, is characterized in that... The filter element frame (A) has a spiral water inlet channel (8) at the water inlet end, and / or an impeller (9) is provided on the lower side of the water inlet channel, and / or a filter element cover (10) is sleeved on the lower side of the impeller (9). The filter element cover (10) has several spiral channels circumferentially arranged on the outer side.

3. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 1 or 2, is characterized in that... The sludge-holding housing includes a housing body, an upper cover edge extending upward from the housing body, a lower cover edge extending downward from the housing body, the inner cavity of the lower cover edge forming a sludge-holding cavity, the circumferential connection of the upper cover edge to the circumferential connection of the pre-filter, and the sludge inlet (5) located on the housing body.

4. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 3, is characterized in that... The shell cover has a connected inlet for dirt in the circumference. Several baffle elements (3) are provided and are staggered in the inlet for dirt in the inlet. The gap between the baffle elements (3) forms the inlet for dirt in the inlet (5). The baffle elements (3) are inclined or have a blocking part to allow impurities to flow in the forward direction and prevent reverse flow.

5. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 4, is characterized in that... The baffle element (3) is a blade, which is inclined from the inlet end of the inlet gap to the outlet end.

6. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 5, is characterized in that... The blades are arranged in a spiral inclined distribution along the sewage inlet, and the anti-backflow cavity is funnel-shaped.

7. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in any one of claims 1 or 2, characterized in that, The contaminant housing is axially extended upward from the center and fixed with an assembly shaft or an assembly shaft cavity, forming an assembly part (4).

8. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in any one of claims 1 or 2, characterized in that, The drain outlet (6) is radial, and the size of the drain outlet (6) near the axis of the anti-backflow cavity is smaller than that of the drain outlet (6) far from the axis of the backflow cavity, so as to achieve graded and staggered discharge of impurities of different sizes.

9. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 3, is characterized in that... The sewage discharge mechanism is also fixedly provided with a sedimentation element (7) downstream of the sewage outlet (6) of the anti-backflow cavity. The sedimentation element (7) includes a sedimentation shell and a sedimentation cavity. The sewage receiving unit (1), the anti-backflow unit (2) and the sedimentation element (7) are all made of transparent material, which makes it easy to observe the sewage discharge status through the filter bottle. The filter element (D) and the backwash filter element (D) are respectively a filter screen type or a filter screen type. The upper cover is provided with a sealing structure in the circumferential direction. The sealing structure is a sealing groove and / or a sealing strip.

10. A filter-type backwashing pre-filter with a large dirt-holding capacity and self-falling sedimentation to prevent backflow, as described in claim 1 or 2, characterized in that, The machine head is provided with an isolation bushing that can isolate the machine head from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle is also provided with a water hammer structure, and the backwash frame (C) is also fitted with a swirl spray component (E).

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