JP-7856544-B2 - Drum-type filtration system using strip-shaped filter media

JP7856544B2JP 7856544 B2JP7856544 B2JP 7856544B2JP-7856544-B2

Inventors

平田隆幸
小貝宣夫

Assignees

ノリタケ株式会社

Dates

Publication Date: 20260511
Application Date: 20221018

Claims (4)

A filter feeding device comprising a drum in which a pair of circular members, rotatably supported by a horizontal drum support shaft, are connected to each other via a connecting member of a predetermined length; an endless annular mesh belt running along half the circumference of the lower outer circumference of the pair of circular members; an endless annular strip of filter material being fed by the filter feeding device with a portion of it sandwiched between the mesh belt and the pair of circular members; a sludge removal and separation device for separating sludge adhering to the outer surface of the strip of filter material fed out from the filter feeding device ; and a device positioned below the drum that filters the strip of filter material through it. A drum-type filtration device using a strip-shaped filter material, comprising: a clean tank for storing the passed coolant; a forward-side strip-shaped filter material, of the endless annular strip-shaped filter material, which is sandwiched between the mesh belt and the pair of circular members and transported; a return-side strip-shaped filter material that has passed through the sludge deliquidation and separation device; and a receiving trough member disposed between the forward-side strip-shaped filter material and the return-side strip-shaped filter material on the lower side of the drum, which receives the clean liquid that has passed downward through the forward-side strip-shaped filter material from the dirty liquid accumulated on the forward-side strip-shaped filter material inside the drum, to guide it to the clean tank . The sludge dewatering and separation apparatus comprises a pair of clamping rollers that continuously clamp the sludge accumulated on the outer surface of the strip-shaped filter material sent from the filter feeding device, and a guide roller positioned downstream of the pair of clamping rollers in the direction of movement of the strip-shaped filter material, which guides the strip-shaped filter material sent from the pair of clamping rollers in a curved, acute-angle direction, thereby forming cracks in the cake-like sludge attached to the outer surface of the strip-shaped filter material after dewatering. A drum-type filtration apparatus using a strip-shaped filter material, characterized in that the guide roller has a smaller diameter than the clamping roller and guides the strip-shaped filter material that has been fed out from the pair of clamping rollers .
The drum-type filtration apparatus using the strip filter material according to claim 1 is characterized in that the sludge deliquidation and separation apparatus is provided with a rotating brush located downstream of the guide roller in the direction of movement of the strip filter material discharged from the filter feeding device, and the rotating brush separates the cake-like sludge that has been deliquidated and adhered to the outer surface of the strip filter material from the strip filter material.
The drum-type filtration apparatus using the strip filter material according to claim 2, characterized in that the sludge deliquidation and separation apparatus is provided downstream of the rotating brush in the direction of movement of the strip filter material, and includes an injection nozzle for separating the sludge after deliquidation adhering to the outer surface of the strip filter material by injecting fluid from the inner surface of the strip filter material.
The drum-type filtration apparatus using the strip-shaped filter material according to claim 1, characterized in that the guide roller has a diameter of 30 mmφ or less and guides the strip-shaped filter material in an acute angle direction of 60° or less.

Description

This invention relates to a drum-type filtration device that uses a strip-shaped filter material that is continuously fed along the lower half of the drum, and through which the coolant is passed, foreign matter contained in the coolant is removed. In machining operations such as grinding and cutting machines used in the manufacture of automotive parts and bearings, a drum-type filtration system using a strip-shaped filter material has been proposed. This filter material is continuously fed along the lower half-circumference of the drum, passing the used, contaminated coolant (dirty liquid) through it. By removing foreign matter from the dirty liquid, a clean liquid is obtained that can be reused. For example, the drum-type filtration system using a strip-shaped filter material described in Figures 1 to 9 of Patent Document 1 is one such example. The drum-type filtration apparatus using the above-described strip-shaped filter media comprises a filter media feeding device equipped with a pair of circular members fixed at predetermined intervals on a rotatable horizontal support shaft, an endless annular mesh belt running along the lower half circumference of the pair of circular members, and strip-shaped filter media continuously fed while sandwiched between the mesh belt and each circular member. As the strip-shaped filter media is fed circumferentially together with the pair of circular members and the mesh belt, the dirty liquid is passed from the inner circumference to the outer circumference of the strip-shaped filter media, thereby obtaining purified coolant (clean liquid). Incidentally, in the drum-type filtration apparatus using strip-shaped filter media described in Figures 1 to 9 of Patent Document 1, the strip-shaped filter media used to filter the dirty liquid is drawn from a roll around which unused strip-shaped filter media is wound, continuously fed while sandwiched between a mesh belt and each circular component, and then the used strip-shaped filter media is collected in a collection box. Because this strip-shaped filter media is disposable, there were problems such as high operating costs for the drum-type filtration apparatus and a significant environmental burden due to the disposal of used strip-shaped filter media. Japanese Patent Publication No. 2001-314703 This is a schematic diagram illustrating the configuration of a drum-type filtration device using a strip-shaped filter material according to one embodiment of the present invention, using its cross-section.This diagram illustrates the support shaft and receiving trough member that rotatably support the drum of the drum-type filtration device shown in Figure 1, and is a cross-sectional view taken along line II-II in Figure 1.Figure 2 is a cross-sectional view illustrating the configuration of the inflow buffer box.This is a plan view illustrating the receiving trough member of the drum-type filtration device shown in Figure 1.This is a plan view showing the flush nozzle provided on the receiving trough member in Figure 4.This is a plan view showing another example of a flush nozzle provided on the receiving trough member in Figure 4.This is a plan view showing another example of a flush nozzle provided on the receiving trough member in Figure 4.This is a plan view showing another example of a flush nozzle provided on the receiving trough member shown in Figure 4.This is a schematic diagram illustrating the configuration of a sludge removal and separation device in a drum-type filtration apparatus using a strip-shaped filter material according to another embodiment of the present invention, using its cross-section. The embodiments of the present invention will be described in detail below with reference to the drawings. Note that the figures in the following embodiments are schematic diagrams that have been simplified as appropriate, and the shapes and dimensional ratios of each part are not necessarily depicted accurately.