JPS6251122B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to a liquid filtration device, and more specifically, a stirring plate provided close to a cylindrical filter element is rotated relative to the filter element. This invention relates to a liquid filtration device that eliminates the accumulation of liquid on surfaces, prevents the adhesion of foreign matter, and enables overwork over a long period of time.

In equipment for filtering high viscosity and high concentration liquids such as thiokolate, molasses, and detergents, clogging frequently occurs due to impurities in the liquid, wax content in the liquid, and petrolatum. The surface was regenerated by scraping off the ivy contaminants with a scraper.

However, this type of filter element has a tapered opening that is narrow on the liquid inlet side and wide on the liquid discharge side, and as the velocity of the liquid flow decreases on the liquid discharge side of this opening, stagnation occurs and the taper The disadvantage was that deposits formed on the walls.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention installs a stirring plate on the liquid discharge side of the filter element and rotates it relative to the filter element to prevent clogging and enable continuous operation for a long period of time. The purpose of the present invention is to provide a liquid filtration device.

Another object of the invention is to provide a liquid filtering device in which the stirring plate has means for forcing excess liquid out.

In conventional liquid filtration devices, since the liquid inflow side of the filter element is concentrated and stagnates, the liquid is stirred to prevent stagnation, but the liquid discharge side after filtration is left unattended. The present invention focused on this point and as a result of intensive research, it was discovered that the accumulation of liquid on the liquid discharge side of the filter element leads to the formation of deposits on the side of the element, resulting in clogging. It is.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a cylindrical filter element, which is composed of a large number of bars 2 arranged approximately parallel to each other at regular intervals, a lid 3 is attached to the upper opening, and a liquid outlet is connected to the lower part through a box 4. It is connected to 5.

Bar 2 that constitutes this filter element 1
has an opening (slit) defined by adjacent bars, has a smooth outer circumferential surface 2a, and has a tapered surface 2b extending inward between adjacent opposing sides. This filter element 1 is manufactured by a method in which a wire is wound spirally around the outer periphery of a drum having openings at a predetermined pitch, and the surface of the wire is cut and polished to form an inward expansion, and a penetrating V-cut groove is formed at a predetermined pitch. A method of forming a self-retaining slit plate having V-cut grooves formed at intervals and discontinuously forming a frame part into a cylindrical shape so that the grooves expand inward. , etc.

The oversurface (outer peripheral surface of the bar) 2a of the filter element 1 is smooth and forms a surface mesh, and as the round scraper 6 revolves around this surface, the round scraper 6 removes the impurities clogging the mesh and regenerates the oversurface. be able to. Coaxially with this round scraper 6, a stirring body 8 protruding from a rotating shaft 7 extending to the center of the cylindrical filter element 1 stirs the filtered liquid within the element 1. The agitator 8 consists of a support arm 9 fixed on the rotating shaft 7 and an inclined plate 10 fixed to the arm with an appropriate inclination.
The outer surface of the filter element 0 is located on a concentric circle at a predetermined interval with respect to the filter element 1, and is rotated by a rotating shaft in a state close to the inner circumference of the filter element 1. The agitating body 8 is formed in multiple stages and is disposed on the rotating shaft 7 in at least two directions, so that the lower end of the inclined plate 10a in the circumferential direction is connected to the next inclined plate 10b so that the liquid descends as the liquid sequentially rotates. A vertical relationship is formed at the position where it intersects with the top edge of.

Reference numeral 11 denotes a main body having a liquid inlet 12 on the upper side and the liquid outlet 5 on the lower side, a lid 13 is attached to the upper opening, and a round scraper 6 and an agitator 8 are mounted on the upper part of the lid 13. A drive device M that rotates at a low speed is mounted. This drive device M is composed of a motor 14, a reducer 15, a coupling 16, and a rotating shaft 7.
is connected to.

The round scraper 6 has upper and lower ring plates 17,
It is rotatably supported on a shaft 19 fixed to 18, and is pressed against the filter element 1 by a coil spring 20. Also, the upper and lower ring plates 17,
An external agitator 21 is attached between the liquid inlet 1 and the liquid inlet 1.
The outer periphery of the filter element 1 is stirred so that the liquid flowing in from the filter element 2 does not stagnate.

Reference numeral 22 denotes a connecting member that connects the rotating shaft 7 and the upper ring plate 17 to transmit rotational force, and is wedged to the rotating shaft 7 at the upper side and fixed to the upper ring plate 17 at the lower side.
The upper ring plate 17 is rotatably fitted onto the upper part of the filter element 1 via an O-ring 23 between the upper ring plate 17 and the lid 3 of the filter element 1.

Reference numeral 24 denotes a receiving plate into which the lower part of the filter element 1 is fitted and fixed, and is fixed to the upper end of the box 4 communicating with the liquid outlet 5. Box 4 is support 2
5, a stopper 26 is attached to the lower part of the main body 11 to prevent rotation of the filter element 1.

The main body 11 has a drain port 2 at the lower conical bottom.
7, and a ring-shaped washing nozzle 28 is attached to the upper part of the conical shape. 29
is an air vent attached to the lid body 13.

In addition to the above structure, the agitating body 8 may be a flat plate erected on the rotating shaft 7 in the axial direction, or a single plate spirally supported on the rotating shaft 7.

In the liquid filtration device constructed as described above, the thiokolate stock solution, molasses, detergent stock solution, etc. sent from the liquid inlet 12 are passed through the filter element 1 from the circumferential surface of the main body 11, and the filtered liquid is passed through the agitator 8. The liquid is stirred and sent to the next process from the liquid outlet 5 via the box 4 without staying in the liquid discharge side of the filter element 1, in other words, in the widening part of the slit of the element 1. During this overwork, the round scraper 6 and the external agitator 21 rotate to constantly regenerate the surface, and also to settle the scraped foreign matter, floating lumps, etc.
The external agitator 21 moves the stock solution remaining on the outer circumferential surface of the filter element 1 to promote the liquid filtration operation. On the other hand, the stirring body 8 rotating at the same time stirs the filtered liquid remaining in the inner peripheral part of the filter element 1, especially in the part where the slit widens,
In addition, it is desirable to urge the filter element 1 to descend so as to prevent deposits from forming on the tapered surface 2b of the filter element 1, thereby preventing clogging of the slit.

As described above, the liquid filtration device according to the present invention concentrates agitation on the inner periphery of the filter element 1, so that deposits are not generated on the tapered surface 2b of the bar 2, and the slits are not clogged over a long period of time. It can be prevented. The filter element 1 has a perfectly circular surface mesh, and the round scraper 6 operates smoothly to completely remove impurities and regenerate the surface. Furthermore, by providing the agitating body 8 with a downward liquid feeding function, it is possible to move the liquid that has passed through and to promote overwork. Therefore, thiokolate, molasses, detergent,
Even when straining liquids such as heavy oil, it is possible to carry out overwork automatically and continuously for a long period of time using a small straining device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
The figure is a perspective view showing the relationship between the filter element and the stirring body, Figure 3 is an enlarged sectional view, and Figure 4 is the first
FIG. 2 is an enlarged plan cross-sectional view taken along line A-A in the figure. 1...Filter element, 2...Bar, 2
a...Outer circumferential surface, 2b...Tapered surface, 4...Box, 5...Liquid outlet, 6...Round scraper, 8...Stirring body, 11...Main body, 12...Liquid inlet, 13...Lid Body, 27...Drain port, M...Drive device.

Claims (1)

[Claims] 1. A main body is provided with a liquid inlet and a liquid outlet facing each other on the upper and lower sides, and a drain port is attached to the conical bottom, which are arranged approximately parallel to each other at regular intervals and have a smooth outer circumferential surface. A filter element consisting of a number of bars with tapered surfaces that spread inward between them is built into and fixed to the top of the main body, and a round scraper circumscribing the filter element and a stirring body built into the filter element are rotatably supported. At the same time, a box is attached to the bottom of the filter element that communicates with the liquid outlet, a lid is attached to the upper opening of the main body, and a drive device that rotates the round scraper and stirring body at low speed is mounted on the lid. A liquid filtration device characterized by: