CN114042351A

CN114042351A - Filter screen assembly of micro-filter with multilayer structure

Info

Publication number: CN114042351A
Application number: CN202111531332.9A
Authority: CN
Inventors: 赵云松; 孙震; 张令; 金爽; 方国锋; 彭丹丹
Original assignee: Anhui Pushi Environmental Protection Equipment Co ltd
Current assignee: Anhui Pushi Environmental Protection Equipment Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-02-15

Abstract

The invention discloses a filter screen assembly of a micro-filter with a multilayer structure, which belongs to the technical field of water treatment equipment and comprises a metal framework arranged on a filter cylinder, wherein a filter screen is laid below the metal framework, connecting through holes are formed in the periphery of the metal framework and are matched with bolts arranged on a pressure plate, the metal framework comprises an outer frame, a plurality of inner ring meshes which are distributed in a chessboard shape are arranged on the outer frame, the inner ring meshes are connected with the outer frame into a whole through connecting plates which are arranged in a longitudinal and transverse mode, and outer ring meshes are arranged on the periphery of the inner ring meshes; the filter screen assembly has the advantages of high strength, reliable structure, large treatment flux, stable effluent quality and stable equipment operation, increases the stress supporting area of the metal framework by designing the edge of the outer ring mesh of the metal framework as a continuous gradual change curve edge, gradually decomposes stress, avoids linear stress concentration, reduces the probability of cutting fracture, improves the structural strength and prolongs the service life of the filter screen.

Description

Filter screen assembly of micro-filter with multilayer structure

Technical Field

The invention belongs to the technical field of water treatment equipment, and particularly relates to a multi-layer microstrainer filter screen assembly.

Background

The micro-filter, or called as a precision filter, filters impurities such as suspended matters and particles in sewage through a filter screen on a filter cylinder so as to achieve the purpose of purifying water quality, and simultaneously washes away the impurities attached to the filter screen in a top backwashing mode to recover the filter flux of the filter screen. The filter screen bears the alternate shearing force action of the self-weight of the sewage and the back flushing force and is easy to damage, so the structural strength and the durability of the filter screen are one of important guarantees for keeping the micro-filter continuously and normally running.

The filter screen subassembly that general water treatment field microstrainer adopted comprises metal filter cloth and metal framework, increases the metal mesh board as the skeleton in metal filter cloth both sides to improve filter screen structural strength, metal framework outer lane mesh edge often designs for sharp limit among the prior art, in order convenient to make, and the design on sharp limit, the easy linear stress that produces concentrates, leads to metal framework here to take place to split, life descends.

In addition, in the prior art, the filter cloth bears the dead weight of sewage when the sewage flows through, the top of the micro-filter bears the washing reverse force, and the filter cloth is easy to break under the repeated shearing action, so that the filter screen assembly has low structural strength and lower impact bearing capacity.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a multi-layer microstructural screen assembly for a micro-filtration machine, which solves the above-mentioned problems encountered in the prior art.

The purpose of the invention can be realized by the following technical scheme:

a multi-layer structure micro-filter screen component comprises a metal framework arranged on a filter cylinder, wherein the filter cylinder is connected with the metal framework through a pressing plate, a filter screen is laid below the metal framework, connecting through holes are formed in the periphery of the metal framework, and the connecting through holes are matched with bolts arranged on the pressing plate;

the metal framework comprises an outer frame, a plurality of inner ring meshes which are distributed in a chessboard shape are arranged on the outer frame, the inner ring meshes are connected with the outer frame into a whole through connecting plates which are arranged vertically and horizontally, and outer ring meshes are arranged around the inner ring meshes.

Furthermore, the outer ring mesh is formed by surrounding a continuous gradual change curve edge, a straight line edge and a connecting plate which are arranged on the outer frame, and the continuous gradual change curve edge is tangent to the straight line edge.

Further, the ratio of the length of the radial side of the continuous gradual change curve side to the length of the straight line side is 1: 1.

Further, the filter screen is formed by multilayer structure combination, the filter screen is equipped with first protective layer, metal filter cloth layer and second protective layer by outer in proper order to interior.

Furthermore, the metal framework and the filter screen are integrated in a sintering mode, and the metal framework is of a single-chip module structure.

The invention has the beneficial effects that:

the filter screen assembly has the advantages of high strength, reliable structure, large treatment flux, stable effluent quality and stable equipment operation, increases the stress supporting area of the metal framework by designing the edge of the outer ring mesh of the metal framework as a continuous gradual change curve edge, gradually decomposes stress, avoids linear stress concentration, reduces the probability of cutting fracture, improves the structural strength and prolongs the service life of the filter screen; meanwhile, a multi-layer metal filter cloth protection structure is designed, so that the structural strength of the filter screen is ensured, and suspended matters are effectively attached, so that the effluent quality is ensured.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the metal framework in cooperation with a screen;

FIG. 3 is a schematic view of a screen construction;

fig. 4 is a process schematic in which the present invention operates.

The reference numbers in the figures illustrate:

1. a metal skeleton; 2. filtering with a screen; 3. a filter cartridge; 4. pressing a plate; 12. an outer frame; 13. meshes of the inner ring; 14. a connecting plate; 15. mesh holes are arranged on the outer ring; 16. a connecting through hole; 17. continuously gradually changing a curve edge; 18. a straight line edge; 201. a first protective layer; 202. a metal filter cloth layer; 203. and a second protective layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

The type of sewage treated by the embodiment is black and odorous water in a river course, and the water inflow of the sewage in the river course is 10000m³And d, the SS of the inlet water is less than or equal to 50mg/L, the water quality standard of the outlet water is designed to be less than or equal to 10mg/L, and a micro-filter is adopted to filter impurities such as suspended matters. The embodiment provides a multi-layer structure microfilter filter screen component, as shown in fig. 1 and fig. 2, comprising a metal framework 1 arranged on a filter cylinder 3, the metal framework 1 is connected on the filter cylinder 3 through a pressure plate 4, a filter screen 2 is laid below the metal framework 1,be equipped with connect the via hole 16 on metal framework 1 all around, the bolt that is equipped with on connect the via hole 16 and the clamp plate 4 mutually supports, adopt the sintering mode to become an organic whole between metal framework 1 and the filter screen 2, and metal framework 1 is monolithic modular structure, adopt the sintering mode, make and have higher mechanical strength between it, increase the steadiness, metal framework 1 is monolithic modular structure, can divide the piece to install on micro-filtration machine strains a section of thick bamboo 3, be convenient for independent maintenance and change, filter screen 2 is corrosion-resistant high strength metal material, if make with 316L stainless steel material, multiplicable life.

As shown in figure 2, the metal framework 1 comprises an outer frame 12, a plurality of inner ring meshes 13 distributed in a chessboard shape are arranged on the outer frame 12, each inner ring mesh 13 is connected with the outer frame 12 into a whole through a connecting plate 14 arranged in a longitudinal and transverse mode, outer ring meshes 15 are arranged on the periphery of each inner ring mesh 13, each outer ring mesh 15 is formed by a continuous gradual change curve edge 17 arranged on the outer frame 12, a straight line edge 18 and the connecting plate 14 in a surrounding mode, the continuous gradual change curve edge 17 is tangent to the straight line edge 18, the length ratio of the radial edge of the continuous gradual change curve edge 17 to the length of the straight line edge 18 is 1:1, the continuous gradual change curve edge 17 can be one of an arc, an involute, a spline curve and the like, an arc edge is recommended to be adopted, the pressing force bearing area of the pressing force of a pressing plate 4 and the self weight of sewage of the metal framework 1 can be increased by designing the arc edge, the stress can be gradually decomposed, the stress concentration is not easy to generate, and the fracture of the metal framework 1 is avoided, meanwhile, the contact surface between the outer ring mesh 15 and the filter screen 2 is increased, so that the shearing action of the right-angled and linear edges on the filter screen 2 is avoided, and the structural strength of the filter screen 2 is improved; the inner ring meshes 13 of the metal framework 1 can adopt one shape of rectangle, square, rhombus and the like, preferably square, and the area of the filter screen 2 in the inner ring meshes 13 is controlled by controlling the area of the single inner ring meshes to achieve sufficient structural strength. The inner ring meshes 13 are designed as squares of 20mm by 20mm, with an area of about 400mm²。

As shown in fig. 3, the filter screen 2 is formed by combining a plurality of layers, and the filter screen 2 is sequentially provided with a first protective layer 201, a metal filter cloth layer 202 and a second protective layer 203 from outside to inside; the first protective layer 201 and the second protective layer 203 are woven by metal wires, which can prevent the metal filter cloth layer 202 from falling off and prevent the metal filter cloth layer 202 from being cut by the diameter of the outer frame 12, thereby improving the structural strength of the whole filter screen 2, the length of the grid is generally 0.5-1 mm, preferably 0.85mm, the diameter of the wire is generally 0.2-0.4 mm, preferably 0.3mm, and the second protective layer 203 can also make the filtered suspended matters, impurities and the like attached to the wire and separated from the sewage, so that the sewage is purified and discharged; the metal filter cloth layer 202 can adopt one of the forms of plain weave, twill weave and the like, the mesh number of the metal filter cloth layer is generally determined according to the water quality requirement of inlet and outlet water, and the mesh number is generally 200-400 meshes.

The filter screen component repeatedly enters the sewage along with the rotation of the micro-filter cartridge 3 and repeatedly bears the dead weight of the sewage, the pressing plate 4 is fixed on the outer ring of the metal framework 1, the edge of the outer ring mesh 15 on the metal framework 1 becomes a stress concentration point, if the shape of the outer ring mesh 15 is designed to be square, the connecting edge of the outer ring mesh 15 and the outer frame 12 becomes a linear type and becomes a linear stress concentration point, the metal framework 1 is easily broken at the position, and therefore, the pressing force of the pressing plate 4 and the stress area of the dead weight of the sewage can be increased by designing the continuous gradual change curve edge 17, such as an arc type edge, the stress can be gradually decomposed, the stress concentration is not easily generated, and the breakage of the metal framework 1 is avoided. Meanwhile, the contact surface between the outer ring mesh 15 and the filter screen 2 is increased, so that the shearing effect of a right-angle connecting edge on the filter screen 2 is avoided, the structural strength of the filter screen 2 is improved, the filter screen 2 and the peripheral framework connecting plate 14 in the inner ring mesh 13 are subjected to symmetrical tensile force at two sides, the stress is relatively uniform, the damage probability is low, and the shape of the inner ring mesh 13 does not need to be changed. In addition, the mesh holes on the metal framework 1 divide the filter screen 2 into a plurality of independent filter units, the filter screen 2 can be supported, the area of the filter screen 2 is controlled by controlling the area of a single mesh hole, and if the area is too large, the spacing between the support points of the filter screen 2 is too large, and the strength is insufficient; if the area is too small, the loss of the effective filtering area is large, the filtering effect of the filter screen 2 can be effectively exerted by controlling the area of a single mesh, and the service cycle of the filter screen 2 is prolonged.

This filter screen subassembly working process: as shown in fig. 4, the microfiltration machine filter cartridge 3 rotates to drive the metal framework 1 fixed on the filter cartridge 3 to rotate, the inlet water of the microfiltration machine passes through the second protective layer 203, and flows out of the first protective layer 201 after being filtered by the metal filter cloth layer 202, and impurities such as suspended matters are intercepted by the metal filter cloth layer 202 and attached to the second protective layer 203, so that the impurities are separated from the sewage.

The filter screen 2 rotates to the upper part of the equipment along with the filter cartridge, the backwashing water is sprayed downwards, passes through the filter screen 2 from the metal framework 1, washes away impurities attached to the second protective layer 203, recovers the treatment flux of the filter screen 2, and filters repeatedly in sequence.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. A multi-layer structure micro-filter screen component comprises a metal framework (1) arranged on a filter cylinder (3), and is characterized in that the metal framework (1) is connected with the filter cylinder (3) through a pressing plate (4), a filter screen (2) is laid below the metal framework (1), connecting through holes (16) are formed in the periphery of the metal framework (1), and the connecting through holes (16) are matched with bolts arranged on the pressing plate (4);

the metal framework (1) comprises an outer frame (12), a plurality of inner ring meshes (13) which are distributed in a chessboard shape are arranged on the outer frame (12), each inner ring mesh (13) is connected with the outer frame (12) into a whole through connecting plates (14) which are arranged vertically and horizontally, and outer ring meshes (15) are arranged around the inner ring meshes (13).

2. A multi-layer microstructural microfilter screen assembly according to claim 1, characterized in that said outer ring of meshes (15) is formed by a continuous gradual curved edge (17) provided on the outer frame (12), a rectilinear edge (18) and a connecting plate (14) in a surrounding manner, and in that the continuous gradual curved edge (17) is tangent to the rectilinear edge (18).

3. A multi-layer microstructural microfilter screen assembly according to claim 2, characterised in that said continuous gradual curvilinear edge (17) has a radial edge length to linear edge (18) length ratio of 1: 1.

4. A multi-layer microstructural microfilter screen assembly according to claim 1, wherein the screen (2) is assembled from a plurality of layers, the screen (2) being provided with a first protective layer (201), a metal screen layer (202) and a second protective layer (203) from the outside to the inside in sequence.

5. A multi-layer microstructural microfilter screen assembly according to claim 1, characterized in that said metal framework (1) is integral with the screen (2) by sintering, and in that the metal framework (1) is of monolithic modular construction.

6. A multi-layer microstructural microfilter screen assembly according to claim 1, characterized in that said screen (2) is made of a corrosion-resistant high-strength metal material.