JPH0143183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a liquid filtration device used, for example, for filtering lubricating oil of a vacuum pump.

[Conventional technology]

FIG. 3 shows a conventional liquid filtration device. In the figure, a container 1 includes a container part 1a having an inlet 2 and made of a conductor, and a lid part 1c having an outlet 3 covering an opening 1b of the container part 1a. It is equipped with One end surface of the filter 4 is attached to the lid part 1c, and after filtering the liquid introduced into the container 1 through the inlet 2, the filter 4 is sent out of the container 1 through the outlet 3. The electrode 5 is attached to the lid part 1c via an insulator 501, and has a cylindrical shape so that the filter 4 can be inserted inside. The voltage applying means 6 is constituted by the outer periphery of the container portion 1a and the electrode 5, and applies a voltage to the liquid in the container 1.

Next, the operation will be explained. A voltage is applied to the liquid introduced into the container 1 from the inlet 2 as shown by arrow A by the voltage applying means 6. For this reason, impurities in the liquid are ionized, the electric double layer is destroyed, or the zeta potential of the electric double layer is neutralized, and the impurities electrostatically aggregate and become larger, and after being filtered by the filter 4. , are sent out of the container 1 from the delivery port 3 as shown by arrow B.

[Problem that the invention attempts to solve]

In the above-mentioned filtration device, when the liquid is lubricating oil for a vacuum pump, for example, the impurities in the liquid are as fine as micro-order, and the impurities are electrostatically aggregated and become larger until they are filtered by the filter 4. To,
There was a problem that required a long time. Further, when gas is mixed into the liquid, there is a problem that the gas cannot be removed.

This idea was made to eliminate this problem, and it filters impurities in liquid in a short time.
The adsorbent strongly adsorbs gas, water, and molecular impurities, and facilitates waste treatment after filtration.

[Means for solving problems]

The liquid filtration device according to this invention includes an outlet made of a conductive pipe inserted through a lid and a filter, and a porous body or a porous body whose one end face is attached to the lid insulated from the outlet and into which the filter is inserted. A cylindrical first electrode made of a mesh-like material, and a cylindrical second electrode made of a porous or mesh-like material whose one end face is attached to the lid at the same potential as the first electrode and into which the first electrode is inserted. a bottom plate inserted through one end of the outlet and installed in direct or indirect contact with the other end surfaces of each of the first and second electrodes;
A voltage applying means consisting of a container part, first and second electrodes, and an outlet;
The device includes an isolator that separates into sealed containers, and first and second adsorbents sealed in the first and second sealed containers.

[Effect]

In this invention, by means of voltage application,
It ionizes impurities in the liquid, destroys the electric double layer, or neutralizes the zeta potential of the electric double layer, and causes the impurities to electrostatically aggregate with each other. The first and second parts are sealed in the first and second sealed containers to enhance the charging effect.
Gas, water, and impurities are adsorbed on an adsorbent, or impurities are electrostatically adsorbed on a filter, and the first and second electrodes and the separator are made of a porous or mesh material. By preventing gas from accumulating and removing the lid from the container, the waste of the adsorbent and filter can be disposed of all at once.

〔Example〕

FIG. 1 shows an embodiment of the liquid filtration device according to this invention. In the figure, a taper 1d is formed on the bottom surface of the container portion 1a, and a first portion is connected to the taper 1d at the lower side of the side surface of the container portion 1a. A drain 1e is provided. A second drain 1f is provided in the lid part 1c, and a first drain 1f, which will be described later, is provided through an insulator 1g.
Electrode connection conductors 1h connected to the second sealed containers 5D and 5E are penetrated and inserted. A bolt 1i attaches the container portion 1a and the lid portion 1c. The outlet 3A is made of a conductive pipe, and the lid part 1c
and a filter 4A made of an insulating dielectric material whose one end surface is attached to the lid portion 1c, and is inserted through the filter 4A, and one end portion 3 protrudes from the other end surface of the filter 4A.
a is closed by a fitting 8 which is a cap nut to be described later, and through holes 3b are evenly bored in the inside of the filter 4A. The first electrode 5A is made of a porous or mesh material and has a cylindrical shape, houses the filter 4A, and has one end surface attached to the lid part 1c via an insulator 5X and connected to the electrode connection conductor 1h. There is. The second electrode 5B is made of a porous or mesh material and has a cylindrical shape, houses the first electrode 5A, and has one end surface attached to the lid part 1e via an insulator 5X. It is connected to the electrode connection conductor 1h at the same potential. The separator 5C is made of a porous material or a mesh material and has a cylindrical shape, and one end surface thereof is connected to the lid portion 1 via the insulator 5X.
c, and the first and second electrodes 5A, 5B
The first and second electrodes 5A and 5B are separated into first and second sealed containers 5D and 5E, which are connected to the electrode connection conductor 1h. The voltage applying means 6A connects the container portion 1a and the first and second electrodes 5.
It consists of A, 5B and an outlet 3A. Bottom plate 7
is made of an insulator, for example, and one end 3 of the outlet 3A
a, and is installed in contact with the other end surfaces of the filter 4A, the first and second electrodes 5A, 5B, and the separator 5C. The attachment 8 is, for example, a cap nut, and is screwed onto the outer periphery of one end 3a of the outlet 3A to close the one end 3a of the outlet 3A and attach the bottom plate 7 to the outlet 3A. The first and second adsorbents 9a and 9b are, for example, zeoherb, sorbito, activated clay, etc.
It is sealed between airtight containers 5D and 5E. The transformer 10 is connected between the first and second electrodes 5A, 5B, the separator 5C, and the lid part 1c via the electrode connection conductor 1h, and a voltage of, for example, 10 to 3000 V/cm is applied thereto. Next, the operation will be explained. A voltage is applied to the liquid introduced into the container 1 from the inlet 2 as shown by arrow A by the voltage application means 6A. Therefore, impurities with relatively large particles in the liquid sent between the container portion 1a and the second electrode 5B are
They are attracted to the second electrode 5B by Coulomb force, collect around the second electrode 5B by electrophoresis, their zeta potential is erased, and they aggregate and coarsen due to intermolecular attraction. Impurities whose specific gravity is lighter than that of the liquid float and separate as shown by arrow C, and are removed from the container 1 through the second drain 1f. In addition, impurities with a higher specific gravity than the liquid are separated by sedimentation as shown by arrow D, and are transferred to the first drain 1e.
is removed from the container 1.

The liquid from which impurities with relatively large particles have been removed is fed into the first and second sealed containers 5D and 5E by pressure as shown by the arrow H, and is sealed in the first and second sealed containers. It evenly contacts the first and second adsorbents 9a and 9b sealed in the containers 5D and 5E.
In this case, the ions on the surface of the pores of the first and second adsorbents 9a and 9b are strengthened by the application of electricity to the first and second electrodes 5A and 5B, and due to the Coulomb force of these ions, , gas and water are the first adsorbent 9a
Next, low molecular weight impurities are adsorbed and removed by the second adsorbent 9b.

On the other hand, a filter 4A made of an insulating dielectric material
A voltage is applied by the first electrode 5A and the outlet 3A to charge a dielectric charge. For this reason,
After passing through the first and second adsorbents 9a and 9b, the colloidal particles and microparticles remaining in the liquid are attracted by the pump pressure and the dielectric charge of the filter 4A, and collect on the outer periphery of the filter 4A. , the zeta potential is eliminated and the particles aggregate, forming a cake and trapping any remaining particles. The liquid from which impurities have been filtered in this manner is transferred from the through hole 3b of the outlet port 3A to the outlet port 3.
A and then sent out of the container 1 as shown by arrow B.

In addition, the filter 4A and the first and second adsorbents 9
a, 9b and the first and second electrodes 5A, 5B, remove the lid part 1c from the container part 1a, then remove the fastener 8, remove the bottom plate 7, and replace the filter 4A and the first and second electrodes 5A and 5B. electrode 5A,
5B and the first and second adsorbents 9a and 9b in the first and second sealed containers 5D and 5E are replaced.

Note that the gas not adsorbed by the first adsorbent 9a is transferred to the first and second electrodes 5A, 5B and the separator 5.
C is a porous body or a mesh body, and the outlet port 3A
Since the through hole 3b is provided in the through hole 3b, the liquid is discharged to the outside of the container 1 together with the liquid.

FIG. 2 shows another embodiment of the liquid filtration device according to this invention. In the figure, the first dielectric 11a is made of an insulating material such as glass fiber with a coarse mesh, and the container portion 1a and the second It is installed between the electrodes 5B. The second dielectric 11b is made of an insulator such as glass fiber with a fine mesh, and is installed between the first electrode 5A and the filter 4A. In this case, the voltage applying means 6A includes a container portion 1a, first and second electrodes 5A and 5B, an outlet 3a, and first and second dielectrics 11a and 11b.

In the case of the embodiment shown in FIG. 2, as in the embodiment shown in FIG.
It is filtered by first and second adsorbents 9a and 9b and filter 4A. Also, the first and second dielectrics 11
Since a and 11b are charged with dielectric charges, impurities ionized by the voltage application means 6A are immediately captured by the first and second dielectrics 11a and 11b.

Therefore, the liquid, like lubricating oil for a vacuum pump,
Even when the impurities are as fine as micro-order,
It can filter effectively in a short time and can also adsorb gases in liquids. In addition, when the liquid has large impurities, such as cutting oil from a cutting machine, the first and second dielectrics 11a and 11b act as a filter, which greatly reduces clogging of the filter 4A. can.

In addition, a first adsorbent 9a that adsorbs gas and water
and a second adsorbent 9b that adsorbs low-molecular impurities.
Since the gas and water are separated, the adsorption of gases, water, and low-molecular impurities is performed more effectively.

In the above embodiment, the attachment 8 is a cap nut to close one end 3a of the outlet 3A, but the attachment 8 may be a nut with the one end 3a of the outlet 3A itself closed.

In addition, if the liquid is water-based such as cutting fluid,
The voltage applied at the transformer 10 may be 1 to 10 V/cm. Furthermore, the polarity of the voltage applied between the first and second electrodes 5A and 5B and the lid portion 1c may be selected depending on the types of the first and second adsorbents 9a and 9b.

Further, in the above embodiment, zeoherb and sorbito are used as the first adsorbent 9a, and zeoherb and sorbitol are used as the second adsorbent 9b.
Although activated clay was used as the first adsorbent 9a, activated clay may be used as the first adsorbent 9a, and zeoherb or sorbito may be used as the second adsorbent 9b.

[Effect of idea]

As described above, according to this invention, coarse impurities in the liquid sent into the container are attracted by the Coulomb force to the porous or mesh electrode, collected and removed, and then, installed separately between the electrodes,
The first, in which the ions on the pore surface are strengthened by the application of electricity.
The second adsorbent effectively adsorbs and removes gas, water, and low-molecular impurities, and furthermore, since colloidal particles and microparticles are aggregated and captured by a filter, impurities are effectively removed. This can significantly improve filter clogging. Furthermore, since the lid is equipped with a filter, first and second electrodes, and a sealed container that contains the adsorbent and contains the adsorbent, waste disposal of the filter and adsorbent can be done at once. It has an effect that can be done easily.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the liquid filtration device according to this invention, Fig. 2 is a sectional view showing another embodiment of the liquid filtration device according to this invention, and Fig. 3 is a conventional liquid filtration device. FIG. In the figure, 1 is a container, 1a is a container part, 1b is an opening, 1c is a lid part, 1d is a taper, 1e, 1
f is the first and second drains, 2 is the inlet, 3A is the outlet, 3a is one end, 3b is the through hole, 4A is the filter, 5A and 5B are the first and second electrodes, 5C is the separator , 5D, 5E are the first and second sealed containers, 6A
is a voltage applying means, 7 is a bottom plate, 8 is a mounting tool, 9
a, 9b are adsorbents, 10 are transformers, 11a, 11
b is the first and second dielectrics. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A container comprising a container portion having an inlet and a lid portion covering the opening of the container portion, one end surface of which is attached to the lid portion, and the container is fed from the inlet port into the container. A filter made of an insulating dielectric material that filters the liquid entered, is inserted through the lid and the filter, one end protrudes from the other end surface of the filter to the outside of the filter, and a portion inside the filter is inserted into the lid and the filter. a delivery port made of a conductive pipe having a through hole for sending the filtered liquid out of the container; one end surface is attached to the lid part insulated from the delivery port;
a cylindrical first electrode made of a porous body or a mesh-like body into which the filter is inserted; one end surface is attached to the lid portion insulated from the outlet and at the same potential as the first electrode; , a cylindrical second electrode made of a porous body or a mesh-like body into which the first electrode is inserted; a cylindrical second electrode made of a porous or mesh-like body into which the first electrode is inserted; The bottom plate is attached to one end of the outlet by a fitting in direct or indirect contact with the end surface, the container part, the first and second electrodes, and the outlet; a voltage applying means for applying a voltage; installed between the first and second electrodes;
a cylindrical separator made of a porous body or a mesh body that separates the electrodes into first and second sealed containers;
a first adsorbent sealed in the first sealed container to adsorb gas, water or low molecular impurities in the liquid; and a first adsorbent sealed in the second sealed container to adsorb low molecular impurities in the liquid. impurities or gases,
A liquid filtration device comprising a second adsorbent that adsorbs water. (2) The voltage applying means applies a voltage to at least one of the container part, the first and second electrodes, the outlet, and between the container part and the second electrode, or between the first electrode and the filter. A liquid filtration device according to claim 1, which comprises a dielectric material installed therein. (3) The dielectric material is a mesh material, and in practical use, the coarse mesh dielectric material is installed between the container part and the second electrode, and the fine mesh dielectric material is installed between the first electrode and the filter. A liquid filtration device according to claim 2 of the patent registration claim. (4) The liquid filtration device according to any one of claims 1 to 3 of the utility model registration claim, wherein one end of the outlet is closed by a fitting. (5) The bottom surface of the container part is tapered, and a first drain is provided at the lower side of the container part in communication with the taper, and a coarse liquid having a specific gravity higher than that of the liquid captured by the second electrode is provided. The liquid filtration device according to any one of claims 1 to 4, wherein impurities are discharged from the first drain to the outside of the container. (6) A second drain is provided between the side surface of the container part of the lid part and the second electrode, and the coarse impurities with a specific gravity lighter than the liquid captured by the second electrode are removed.
Utility model registration claims 1 to 5, in which the waste is discharged from the second drain to the outside of the container.
Liquid filtration device according to any one of paragraphs. (7) The liquid filtration device according to any one of claims 1 to 6, wherein the separator is made of a conductor and has the same potential as the first and second electrodes.