CN218342979U

CN218342979U - Polypropylene seven-layer composite filter screen

Info

Publication number: CN218342979U
Application number: CN202222436080.8U
Authority: CN
Inventors: 白秀峰
Original assignee: Gu'an Huimin Plastic Filter Co ltd
Current assignee: Gu'an Huimin Plastic Filter Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-01-20
Anticipated expiration: 2032-09-13

Abstract

The utility model discloses a polypropylene seven-layer composite filter screen, which comprises a net rack frame, wherein a first protective layer, a second protective layer, a filter layer, a third protective layer, a fourth protective layer, an isolation layer and a support layer are arranged in the net rack frame, and the first protective layer, the second protective layer, the filter layer, the third protective layer, the fourth protective layer, the isolation layer and the support layer are connected by welding; the first protective layer, the second protective layer, the filter layer, the third protective layer, the fourth protective layer, the isolation layer and the support layer are all embossed silk screens, the mesh number of the second protective layer is equal to that of the third protective layer, and the mesh number of the second protective layer is 0-30% smaller than that of the filter layer; the mesh numbers of the first protective layer, the second protective layer and the fourth protective layer are in an increasing trend, and the mesh number of the fourth protective layer is equal to that of the filtering layer; the mesh numbers of the isolation layer and the supporting layer are both smaller than the mesh number of the first protective layer, and the mesh number of the isolation layer is larger than that of the supporting layer. The utility model has the advantages of simple structure, good filtering effect and long service life.

Description

Polypropylene seven-layer composite filter screen

Technical Field

The utility model relates to a polypropylene production technical field, more specifically relate to a seven layers of compound filter screens of polypropylene.

Background

Polypropylene produces some black particulate matter during the production process, which, if incorporated into the finished product, can greatly affect the quality and price of the polypropylene. Therefore, the current polypropylene device is additionally provided with a filter before granulation to filter out black particles.

At present, most of polypropylene filters use a punching plate welded with a single-layer wire mesh for filtering. The punching plate is used as a support, and black particles are intercepted by utilizing the aperture control of the silk screen. However, due to the limited permeability of the perforated plate, when the flow reaches a peak, the area of the perforations of the perforated plate is insufficient to meet the flow, and the resistance value increases. When the resistance value is too high, the liquid polypropylene can oppositely impact the silk screen on the pore plate and drag the silk screen; since the screen is relatively fragile, it is easily torn. When the silk screen is torn, the black particles contained in the silk screen can enter the downstream, and finally, the quality of the product is affected.

Therefore, a filter net is needed to solve the problems of high resistance and low strength caused by welding a single-layer wire mesh on a punching plate for filtering.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a seven layers of compound filter screens of polypropylene to solve the problem in the background art.

In order to solve the technical problem, the utility model adopts the following technical proposal.

The polypropylene seven-layer composite filter screen comprises a screen frame, wherein a first protective layer, a second protective layer, a filter layer, a third protective layer, a fourth protective layer, an isolation layer and a support layer are sequentially arranged in the screen frame from top to bottom, and the first protective layer, the second protective layer, the filter layer, the third protective layer, the fourth protective layer, the isolation layer and the support layer are connected through welding; the first protective layer, the second protective layer, the filter layer, the third protective layer, the fourth protective layer, the isolation layer and the support layer are all embossed silk screens, the mesh number of the second protective layer is equal to that of the third protective layer, and the mesh number of the second protective layer is 0-30% smaller than that of the filter layer; the mesh numbers of the first protective layer, the second protective layer and the fourth protective layer are in an increasing trend, and the mesh number of the fourth protective layer is equal to that of the filter layer; the mesh numbers of the isolation layer and the supporting layer are both smaller than the mesh number of the first protective layer, and the mesh number of the isolation layer is larger than that of the supporting layer.

According to the technical scheme, the front end face and the rear end face of the net frame are composed of connecting rods arranged in a shape like a Chinese character 'mi'.

The technical scheme is further optimized, the welding mode is spot welding, and welding spots of the spot welding are uniformly distributed on the edge of each layer.

According to the further optimized technical scheme, the first protective layer, the second protective layer, the third protective layer and the fourth protective layer are respectively 20 meshes, 60 meshes and 100 meshes, the filter layer is 100 meshes, the isolation layer is 15 meshes, and the support layer is 10 meshes.

Due to the adoption of the technical scheme, the utility model has the following technical progress.

The utility model provides a polypropylene seven-layer composite filter screen, which utilizes a plurality of layers of embossed silk screens which are compounded together to filter black granular substances generated in the production process of polypropylene; the filter layer is protected by arranging a protective layer; the supporting layer is used for replacing the original punching plate to play a supporting role, and the passing rate is increased by 30%. The utility model discloses guaranteed the flow of polypropylene, increased the intensity of filter screen for the polypropylene medium peak value can not produce the filter screen when passing through and destroy, with the life-span has been prolonged, has guaranteed stability, has simple structure, the advantage that the filter effect is good, long service life.

Drawings

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

FIG. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is a top view of the present invention.

Wherein: 1. a first protective layer, 2, a second protective layer, 3, a filter layer, 4, a third protective layer, 5, a fourth protective layer, 6, an isolation layer, 7, a support layer, 8, welding spots, 9 and a net rack frame.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific embodiments.

The polypropylene seven-layer composite filter screen is shown in fig. 1 to 3, and comprises a first protective layer 1, a second protective layer 2, a filter layer 3, a third protective layer 4, a fourth protective layer 5, an isolation layer 6, a support layer 7, welding spots 8 and a net rack frame 9.

The net rack frame 9 is composed of connecting rods, and the front end surface and the rear end surface of the net rack frame 9 are arranged in a shape of Chinese character mi; the shape of the plate may be cylindrical, plate-like, arc-like, or the like, as required.

The first protective layer 1, the second protective layer 2, the filter layer 3, the third protective layer 4, the fourth protective layer 5, the isolation layer 6 and the support layer 7 are sequentially arranged in the net frame 9 from top to bottom, and the first protective layer 1, the second protective layer 2, the filter layer 3, the third protective layer 4, the fourth protective layer 5, the isolation layer 6 and the support layer 7 are connected together through welding; the welding mode is spot welding, and welding spots 8 of the spot welding are uniformly distributed on the edge of each layer.

The first protective layer 1, the second protective layer 2, the filter layer 3, the third protective layer 4, the fourth protective layer 5, the isolation layer 6 and the support layer 7 are all embossed silk screens. Because the filter layer 3 has a high mesh number and is relatively fragile, in order to prevent the filter layer 3 from being broken, an upper protective layer and a lower protective layer are required to protect the filter layer 3. Therefore, the mesh number of the second protective layer 2 is equal to that of the third protective layer 4, and the mesh number of the second protective layer 2 is 0-30% smaller than that of the filter layer 3.

The mesh numbers of the first protective layer 1, the second protective layer 2 and the fourth protective layer 5 are in an increasing trend, and the mesh number of the fourth protective layer 5 is equal to that of the filter layer 3.

The mesh numbers of the isolation layer 6 and the support layer 7 are both smaller than the mesh number of the first protection layer 1, and the mesh number of the isolation layer 6 is larger than the mesh number of the support layer 7. The isolation layer 6 generates a buffer for the friction between the protection layer and the support layer 7, and meanwhile, the isolation layer 6 generates a larger supporting force for the combination of the support layer 7. The supporting layer 7 is an embossed silk screen, and has strong supporting force, so that the composite filter screen is ensured not to deform while supporting.

The utility model discloses when the in-service use, can realize the regulation of precision between 40 meshes-500 meshes, only need according to the precision change filter layer 3 and protective layer can. Taking the filter layer 3 as 100 meshes as an example, the first protective layer 1, the second protective layer 2, the third protective layer 4 and the fourth protective layer 5 are respectively 20 meshes, 60 meshes and 100 meshes, the isolation layer 6 is 15 meshes, and the support layer 7 is 10 meshes. Replace original board of punching a hole through supporting layer 7 and play the effect of support, make the percent of pass of compound filter screen increase 30% for the percent of pass of original board of punching a hole, when guaranteeing to black particulate matter filterable in the polypropylene, avoided appearing the too high phenomenon of resistance, and then guaranteed can not damage the filter screen, prolonged the life of compound filter screen.

Claims

1. Seven layers of compound filter screens of polypropylene, its characterized in that: the filter screen comprises a screen frame (9), wherein a first protective layer (1), a second protective layer (2), a filter layer (3), a third protective layer (4), a fourth protective layer (5), an isolation layer (6) and a support layer (7) are sequentially arranged in the screen frame (9) from top to bottom, and the first protective layer (1), the second protective layer (2), the filter layer (3), the third protective layer (4), the fourth protective layer (5), the isolation layer (6) and the support layer (7) are connected through welding; the first protective layer (1), the second protective layer (2), the filter layer (3), the third protective layer (4), the fourth protective layer (5), the isolation layer (6) and the support layer (7) are all embossed silk screens, the mesh number of the second protective layer (2) is equal to that of the third protective layer (4), and the mesh number of the second protective layer (2) is 0-30% smaller than that of the filter layer (3); the mesh numbers of the first protective layer (1), the second protective layer (2) and the fourth protective layer (5) are in an increasing trend, and the mesh number of the fourth protective layer (5) is equal to that of the filter layer (3); the mesh numbers of the isolation layer (6) and the support layer (7) are both smaller than the mesh number of the first protection layer (1), and the mesh number of the isolation layer (6) is larger than the mesh number of the support layer (7).

2. The polypropylene seven-layer composite filter screen according to claim 1, wherein: the front end face and the rear end face of the net frame (9) are composed of connecting rods arranged in a shape like a Chinese character mi.

3. The polypropylene seven-layer composite filter screen according to claim 1, wherein: the welding mode is spot welding, and welding spots (8) of the spot welding are uniformly distributed on the edge of each layer.

4. The polypropylene seven-layer composite filter screen according to claim 2, wherein: the first protective layer (1), the second protective layer (2), the third protective layer (4) and the fourth protective layer (5) are respectively 20 meshes, 60 meshes and 100 meshes, the filter layer (3) is 100 meshes, the isolation layer (6) is 15 meshes, and the support layer (7) is 10 meshes.