JPS6110727Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a filter element used for filtering liquids containing metal shavings and the like.

For filtering liquids, especially oils, containing metal particles such as metal shavings, filter paper elements are preferred because they are inexpensive and have good filtration efficiency. This type of element is made by winding a filter paper 2 bent into a substantially corrugated shape as shown in FIG. 1B into a cylinder around a cylinder 1 shown in FIG. Attach the perforated caps 3 shown in Figure 1C above and below the
It is constructed by arranging a ring 4 shown in FIG. This is shown in FIG. This element is
As shown in FIG. 3, the cylinder 1 is placed on the pedestal 7 of the filtrate pipe 6 provided in the case 5, and the cylinder 1 is fitted onto the threaded core rod 8 that is planted from the bottom of the pedestal 7. It is placed in this state and fixed with a nut 9. The case lid 10 is mounted on the case 5 and fixed with a nut 11. Reference numeral 12 indicates a stock solution pipe for supplying stock solution into the case 5, and reference numeral 13 indicates a ring of the case lid 10. The stock solution is fed into the case 5 at a predetermined pressure from the stock solution pipe 12 as indicated by the arrow in the figure, passes through the outer peripheral surface of the filter paper 2, enters the cylinder 1, and is taken out through the filtrate pipe 6. When passing through the outer peripheral surface of the filter paper 1, metal particles in the stock solution are captured and remain on the outer peripheral surface. In this way, metal particles accumulate on the outer peripheral surface as the filtration progresses. This metal particle is
During filtration, it adheres to the outer peripheral surface of the filter paper 2 due to the pressure of the stock solution, but when the pressure is removed by stopping filtration, it falls due to its own weight. In this case, since there is a lower cap 3, the falling metal particles do not fall downward from there, but are deposited on the lower cap 3 one after another. As a result, the outer circumferential surface of the filter paper 2 is sequentially covered with deposited metal particles starting from the lower cap 3 side, and the filtration area becomes smaller, so clogging occurs relatively early, making it necessary to frequently replace the element.

This idea was devised in view of these circumstances, and is a filter element that traps particles on the outer circumferential surface of the filter material.A strong sheet is placed around the outer periphery of the core tube, which has many through holes around the filter element. A filter medium made by folding a piece of filter paper into an extremely small wave shape is arranged in a cylindrical shape, and a cap with a diameter larger than the outer diameter of the filter medium is fitted and fixed at the upper end, and a cap with a larger diameter than the outer diameter of the filter medium is attached to the lower end. A blind lid with a smaller diameter than the outer diameter of the core tube and a larger diameter than the outer diameter of the core tube is fitted and fixed to integrate the filter medium and the core tube. The gist of the filter element is a filter element in which openings formed between the filter elements are each individually closed.

In other words, this filter element is made by bending a strong sheet-like filter paper into extremely small waveforms and using this as the filter material, which allows for an extremely large filtration area, resulting in a significant improvement in filtration efficiency. can. In addition, when compressed air is blown into the stock solution around the outer periphery of the filter material to vibrate (bubble) the stock solution in order to sift off filtration residue such as metal particles from the filter material, it is possible to easily remove filter residues such as metal particles from the filter material by bubbling. Since the filter vibrates, filter residue can be sieved off smoothly, and the filter material can be easily reused without having to be replaced. Moreover, in this filter element, the openings created between the corrugated peaks and the core tube at the lower end of the filter material are each individually closed, and are not closed using a cap as in the past. When filtration is stopped, metal particles and the like adhering to the outer circumferential surface of the filter medium fall freely and do not cover the outer circumferential surface of the filter medium. Therefore, clogging phenomenon hardly occurs and it can be used for an extremely long period of time.

Next, this invention will be explained based on examples.

FIG. 4 is a perspective view of one embodiment of this invention, FIG. 5 is a perspective view of the main part of FIG. 4 looking up from below, and FIG. 6 is a partially enlarged perspective view. That is,
This element does not use a lower cap, but instead inserts a spacer of the same shape as the opening in the opening created between the corrugated peak and the core tube at the lower end of the cylindrical filter paper 2, as shown in Figure 6. 14 is fitted to close the opening. The lower end of the cylinder 1 is sealed with a disc-shaped blind lid 15. The other parts are the first
Similar to the elements in the figure.

As shown in FIG. 7, this element is inserted into a case 17 with a suspension pipe 16 with a threaded outer circumferential surface attached to the upper cap 3, and the tip of the suspension pipe 16 is attached to the case lid 18. The suspension pipe 16 is made to protrude from a hole provided in the suspension pipe 16, and is fixed by engaging and tightening a nut 19 on the protrusion of the suspension pipe 16. 20 is a snake eye bolt that fixes the case lid 18 to the case 17 so that it can be opened and closed; 21 is its nut;
22 is a rubber or vinyl pipe connected to the protruding tip of the suspension pipe 16; 23 is a stock solution pipe for supplying the stock solution into the case 17; That is, the stock solution is fed into the case 17 at a predetermined pressure as shown by the arrow in the figure, passes through the outer peripheral surface of the filter paper 2, enters the cylinder 1, rises inside the cylinder 1, and passes through the suspension pipe 16 and the rubber. It is removed via tube 22. The metal particles captured during this filtration separate from the outer peripheral surface of the filter paper 2 and fall when the filtration is stopped. In this case, since the element is not provided with a conventional lower cap, metal particles falling from the outer peripheral surface of the filter paper 2 pass through the lower part of the element and accumulate at the bottom of the case 17. (not shown).
That is, this element has a large filtration area and high filtration efficiency. The element is fixed at both the upper and lower parts, and the filtrate is taken out from the lower part, breaking away from the conventional wisdom that it is fixed only at the upper part, so that the filtrate is taken out from the upper part instead of the lower part. west,
Since the metal particles are allowed to fall freely by removing the cap needed to fix the bottom, clogging hardly occurs, and even if clogging occurs, the filter residue can be easily peeled off by bubbling and the filter paper can be recycled. The filter paper can be used for an extremely long time without having to be replaced. In addition, since the opening created between the corrugated peak and the core tube at the lower end of the filter paper 2 is closed with a spacer 14 having the same shape as the opening, even if pressure is applied to the filter paper 2 during filtration, the lower end The opening closes and filtration is no longer performed in that area (because the internal space of the filter paper necessary for filtration is no longer available)
This phenomenon does not occur. Therefore, a stable filtration state is maintained.

In the above embodiment, the spacer 14 is used to close the lower opening of the filter paper 2, but the spacer 14 may not be used and the lower opening may be closed with adhesive while maintaining its shape. . moreover,
As shown in FIG. 8, the storage case 17 for the element is provided with a lamp tube 24 protruding inward from the bottom side surface, and a peephole 25 provided on the opposite surface, so that the metal that accumulates at the bottom The particles may be illuminated by a lamp 26 in the lamp tube 24 so that their quantity can be determined.

Since the filter element of this invention is constructed as described above, it is possible to have a large filtration area and achieve a significant improvement in filtration efficiency, and it is also possible to easily sift off filtration residue by bubbling. Because of this, it can be reused repeatedly with simple operations, and when filtration is stopped, captured particles that adhere to the outer surface of the filter material will leave the outer surface and reach the lower end of the filter material, where they will fall naturally to the outside of the filter material. It becomes like this. Therefore, clogging caused by captured particles hardly occurs, and the device can be used for an extremely long period of time. In addition, when the lower end opening of the filter material is closed using a spacer, the shape of the lower opening is completely maintained and the internal space necessary for filtration is maintained, so a stable filtration condition is maintained. will be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of manufacturing the conventional example, Fig. 2 is a perspective view thereof, Fig. 3 is an explanatory diagram of its usage state, and Fig. 4 is an explanatory diagram of the conventional example.
The figure is a perspective view of one embodiment of this invention, and FIG.
Fig. 6 is a partially enlarged perspective view of the figure, Fig. 7 is an explanatory diagram of how the element in Fig. 4 is used, and Fig. 8 is a modification of the case. FIG. 1...Cylinder, 2...Filter paper, 3...Cap, 1
4...Spacer, 15...Blind lid.

Claims (1)

[Claims for Utility Model Registration] (1) A filter element that traps particles on the outer circumferential surface of a filter medium, which has a strong sheet-like filter paper on the outer circumference of a core tube that has many through holes on the circumferential surface. A filter material made by bending a cap into an extremely small wave shape with a pitch is arranged in a cylindrical shape, and a cap with a diameter larger than the outer diameter of the filter material is fitted and fixed at the upper end, and a cap with a diameter smaller than the outer diameter of the filter material is attached to the lower end. A blind lid with a diameter larger than the outer diameter of the core tube is fixed concentrically with the core tube to integrate the filter material and the core tube, and at the lower end of the filter material, the corrugated peak and the core tube A filter element characterized in that each opening formed between the filter elements is individually closed. (2) The filter element according to claim 1, wherein the opening formed between the crest of the waveform and the core tube is closed using a spacer.