JP2023179819A - screen filter - Google Patents

Abstract

To provide a screen filter for strainer being a facility which removes impurities contained in water to purify the water to fresh water or clear water, has high durability and can surely remove a foreign matter.SOLUTION: A screen filter according to the present invention includes a punching metal, a first wire net having the smaller rate of hole area than that of the punching metal, and a second wire net having the higher mesh number than that of the first wire net. The punching metal, the first wire net and the second wire net are laminated in this order and integrated by welding by means of sintering processing.SELECTED DRAWING: Figure 1

Description

The present invention relates to a screen filter for a strainer, which is equipment for removing impurities contained in water and purifying it into fresh or purified water.

Traditionally, the papermaking process for producing paper requires a large amount of water. Further, if the water used in the paper manufacturing process contains impurities, the impurities will also be mixed into the paper that is finally made, resulting in poor quality. Therefore, the water used in the paper manufacturing process is required to be free of impurities.

Therefore, strainers are used as equipment to remove impurities contained in water.

Figure 4 is a schematic diagram of a general strainer (1), and the strainer (1) filters impurities by filtering water flowing into the strainer (1) with a screen filter (2) located inside the strainer (1). This is equipment that removes

5 and 6 show a screen filter (2) for a general strainer (1) and its layer structure. A typical screen filter (2) has a two-layer structure of punched metal (4) and wire mesh (3) (for example, 100 mesh), and is made by laminating these two types of metal and welding them by soldering. It is formed.

Further, Patent Document 1 discloses a screen filter (2) having a single layer structure consisting of only a punching metal (4).

Japanese Patent Application Publication No. 2007-296490

However, these conventional screen filters (2) have a one-layer or two-layer structure, so they have very low strength and can easily be damaged by slight contact, such as contact with impurities or human contact. there were. When the screen filter (2) was damaged, if the damage was minor, it was possible to repair it by welding the damaged area, but if there were multiple areas to repair, the porosity of the screen filter (2) would decrease. There was a problem in that water purification ability decreased as foreign substances could no longer be removed.

In view of the above problems, the present invention provides a screen filter (2) that is highly durable and capable of reliably removing foreign substances.

The present invention is a screen filter for a strainer that removes and purifies foreign substances contained in water. The metal mesh is also made of a second wire mesh with a high mesh number, and is characterized in that the punched metal, the first wire mesh, and the second wire mesh are laminated in order, and then welded and integrated by a sintering process to form a cylindrical shape. It is a screen filter that

The screen filter (2) of the present invention differs from conventional screen filters in that it has a three-layer structure, and the metals in each layer are joined by sintering to increase the adhesive strength between the metals in each layer. Therefore, compared to conventional screen filters, it has improved durability and is not damaged, allowing efficient removal of impurities and a stable supply of high-quality water with few impurities.

In addition, we have considered a structure with three or more layers in order to improve the durability of the screen filter, but we understand that the filter structure becomes complicated and the price increases, and that the effect of removing impurities cannot be expected to be very effective.

A diagram showing an example of a screen filter of the present invention A diagram showing an example of the layered structure of the screen filter of the present invention A diagram showing an example of a screen filter of the present invention Schematic diagram of a common strainer Diagram showing screen filters for common strainers Diagram showing the layer structure of a screen filter for general strainers

A screen filter (2) of the present invention is shown in FIG.

The screen filter (2) of the present invention has a three-layer structure of a punched metal (4) and two wire meshes, a first wire mesh (5) and a second wire mesh (6) having different numbers of meshes.

Specifically, as shown in FIG. 2, a first wire mesh (5) and a second wire mesh (6) are laminated in this order inside a punched metal (4).

The difference between the first wire mesh (5) and the second wire mesh (6) is due to the difference in the number of meshes. Specifically, the second wire mesh (6) has a higher mesh number (fine mesh) than the first wire mesh (5).

For example, when the number of meshes of the first wire mesh (5) is 10 meshes, the number of meshes of the second wire mesh (6) is set to 100 meshes.

By making the mesh number of the second wire mesh (6) higher than the mesh number of the first wire mesh (5) in this way, it is possible to capture even smaller residues that have passed through the first wire mesh (5).

Further, it is preferable to use a punching metal (4) having a higher porosity than the first wire mesh (5) and the second wire mesh (6).

The first wire mesh (5), the second wire mesh (6), and the punched metal (4) stacked in this manner are welded by performing a sintering process.

Although sintering treatment is illustrated here, any other treatment method may be used as long as it is an intermetallic bond.

By performing the sintering process, the wires of the first wire mesh (5), second wire mesh (6), and punching metal (4) are welded and integrated, making it stronger than traditional soldering. Adhesive strength can be obtained.

Note that the sintering treatment may be performed by a known sintering method.

The first wire mesh (5), second wire mesh (6), and punched metal (4) welded by the sintering process are made into a cylinder as shown in Fig. 2, and then the overlapping areas are welded. Let it be a screen filter (2).

The screen filter (2) formed in this way uses the first wire mesh (5) to collect the residue that has passed through the punched metal (4), and the second wire mesh to remove the residue that has passed through the first wire mesh (5). (6) makes it possible to capture the image.

Further, as shown in Fig. 3, the screen filter (2) of the present invention has a bracket part (7) on the top surface of the cylindrical shape and a bottom cover part (9) on the bottom surface, each of which is attached to the screen filter (2) by welding. It is glued.

The bracket part (7) serves to mount and fix the screen filter (2) inside the strainer.

The bottom lid part (9) serves to place and retain foreign substances removed by the screen filter (2) by closing one side of the cylindrical shape of the screen filter (2).

Furthermore, reinforcing rings (8) are provided at the center and lower part of the screen filter (2). By providing the reinforcing ring (8), the strength of the screen filter (2) is further improved. Note that this reinforcing ring (8) may or may not be attached.

1 Strainer 2 Screen filter 3 Wire mesh 4 Punching metal 5 First wire mesh 6 Second wire mesh 7 Bracket part 8 Reinforcement ring 9 Bottom cover part

Claims (1)

A screen filter for a strainer that removes impurities contained in water and purifies it into clean or purified water,
The screen filter includes a punched metal, a first wire mesh having a smaller porosity than the punched metal, and a second wire mesh having a higher mesh number than the first wire mesh,
A screen filter characterized in that the punching metal, the first wire mesh, and the second wire mesh are laminated in order, and then welded and integrated by a sintering process to form a cylindrical shape.

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