JP2673040B2 - Filter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a filtration device that adsorbs and removes impurities contained in a liquid, in particular, magnetic substances such as iron by a magnet.

[Prior Art] Conventionally, in order to remove magnetic substances such as iron contained in a liquid, this filtered liquid is passed through a container equipped with a plurality of magnets, and the magnetic substances are adsorbed by magnetic force. There is a filtering device that removes impurities in this liquid.

In such a filtering device, when the amount of the magnetic substance adsorbed on the surface of the magnet increases, the adsorbing ability decreases, so it is necessary to regularly remove the adsorbed magnetic substance. In the conventional filtering device, the removal of the magnetic substance adsorbed on the surface of the magnet is manually performed after the operation of the filtering device is temporarily stopped and the magnet is taken out from the filtering device. For this reason, this cleaning operation is inefficient, and there is a problem that the operating rate of this filtering device decreases.

In addition, a magnet is inserted in the adsorption pipe, the magnetic substance is adsorbed on the surface of the adsorption pipe by the magnetic force of the magnet, and the magnet is taken out from the adsorption pipe at the time of cleaning and placed on the surface of the adsorption pipe. There are also filtration devices that facilitate the removal of adsorbed magnetic material.

However, in the conventional filtration device as described above, in any case, when removing the adsorbed magnetic substance,
It is necessary to stop the filtration device, and there is a problem that continuous operation cannot be performed.

There is also a filtering device in which a plurality of magnets are automatically taken out one after another, the taken-out magnets are washed and returned to the inside of the filtering device one by one so that the filtering device can be continuously operated without being stopped. However, such a structure has a problem that the structure becomes extremely complicated and the cost of the device increases.

[Problems to be Solved by the Invention] The present invention has been made by paying attention to such a problem, and an object thereof is to remove a magnetic substance in a liquid by a simple means to enable continuous operation. Another object of the present invention is to provide a filtration device having a simple structure and a low device cost.

[Means for Solving the Problems] The present invention comprises a filter body having first and second filtration chambers, and an adsorption conduit penetrating both the first and second filtration chambers. Further, a magnet is slidably inserted in the adsorption conduit in the axial direction, and the magnet is selectively moved into either the first or second filtration chamber. Further, a moving mechanism for selectively moving this magnet is provided.

[Operation] In such a filtering device, the moving mechanism moves the magnet into, for example, an adsorption pipe in a portion in the first filtration chamber, and the switching supply mechanism causes the filtrate to flow into the first filtration chamber.
Supply into the filtration chamber of. The filtrate supplied to the first filtration chamber is adsorbed on the surface of the adsorption pipe in the portion inside the first filtration chamber by the magnetic force of the magnet, and the filtration of the filtrate is performed. Then, when the amount of the magnetic substance adsorbed on the surface of the adsorption pipe exceeds a predetermined amount, the magnet is moved by the moving mechanism, and the adsorption pipe of the portion in the second filtration chamber is moved. Inside, and at the same time, switching operation of the switching supply mechanism is performed to supply the filtrate into the second filtration chamber,
Filtration is performed in this second filtration chamber.

On the other hand, the cleaning liquid is supplied from the cleaning liquid supply mechanism into the first filtration chamber to remove the magnetic substance adsorbed on the surface of the adsorption pipe in the portion inside the first filtration chamber. In this case, since there is no magnet in the adsorption pipe in the portion of the first filtration chamber,
Cleaning of this magnetic substance is easily performed.

By repeating such operations alternately, the filter device is continuously operated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 4 are views showing a first embodiment of the filter according to the present invention.

Such a filter has a first partition partitioned by a partition wall 5.
And a filter body 1 having second chambers 3a and 3b, and a plurality of adsorption pipes 12 penetrating through the first and second chambers 3a and 3b and arranged in parallel with each other.
In addition, a permanent magnet 4 having a length substantially the same as the width of the first and second chambers 3a and 3b is housed in the adsorption pipes 12. As shown in detail in FIG. 4, the permanent magnet 4 is a bolt for alternately joining a plurality of short cylindrical magnet elements 41 and washers 44 so as to integrally connect them by penetrating them in the longitudinal direction. 42 and a nut 43 are provided. Further, locking pins 45 are provided at both ends of the suction pipe 12 at positions where the head of the nut 43 can abut. These permanent magnets 4
Is slid in the adsorption pipe 12 by a moving mechanism attached to the outer surface of the filter body. As shown in FIG. 1, according to this moving mechanism, the compressed air sent from the compressor (not shown) is opened / closed by the three-way solenoid valve 8a to open the air port 13 on the first chamber 3a side. To the air chamber 7a. Since this air chamber 7a is connected to a plurality of adsorption pipes, the high-pressure air that is sent is evenly sent to each adsorption pipe 12. The outer peripheral surface of the washer 44 is slidably in close contact with the suction pipe 12. Therefore, most of the pressing force of the high-pressure air acts on the permanent magnet 4. This pressing force causes the permanent magnet to
It can be positioned in the second chamber as shown. Other high-pressure air is adsorbed on the adsorption pipe 12 and the second chamber 3b.
It is discharged from the three-way solenoid valve 8b to the outside of the chamber through the air port 13 and the air chamber 7b.

When the permanent magnet 4 is arranged at such a position, the filtrate switching supply mechanism operates and the two-way solenoid valves 2a, 2b
Is opened, the two-way solenoid valves 2c and 2d are closed, and the filtrate A is supplied into the second chamber 3b through the filtrate inlet 9a. The supplied filtrate is slid around the suction pipe 12 arranged in the second chamber, and the magnetic substance such as iron powder contained in the filtrate is adsorbed on the surface of the suction pipe 12 by magnetic force.
The purified filtrate B is the filtrate outlet of the second chamber 3b.
It is discharged from the two-way solenoid valve 2b to the outside of the chamber via 9b.

During the above-described filtration process, the two-way solenoid valves 2c and 2d are closed in the first chamber, so the filtrate A is not passed.

If the filtration in the second chamber 3b is continued, the adsorption pipe
The magnetic substance is laminated on 12 and the adsorption force decreases. At this time,
The two-way solenoid valves 2a, 2b are closed, and then the two-way solenoid valves 2c, 2d are opened in the opposite. As a result, the filtrate A is sucked into the first chamber 3a. At the same time, the movement mechanism operates,
Similarly, the permanent magnet 4 is moved to the first chamber 3a side.
At this time, the high-pressure air sent from the compressor (not shown) is supplied to the air chamber from the three-way solenoid valve 8b via the air port 13.
7b, adsorption pipe 12, air chamber 7a, air port 1
It is released from the three-way solenoid valve 8a to the outside via the 3rd axis.

The adsorption pipe 12 on which the above-mentioned magnetic substance is adsorbed is positioned in a chamber opposite to the permanent magnet 4, and a cleaning liquid supply mechanism (not shown) is activated during filtration in this chamber. Then, the magnetic substance adsorbed on the surface of the adsorption pipe 12 is removed and discharged. For example,
In the case shown in FIG. 1, the branched two-way solenoid valve 6a is closed and 6c is opened, and the discharge side two-way solenoid valve 6b.
Is closed and the two-way solenoid valve 6d is open. The cleaning liquid sent from a supply source (not shown) is injected from the two-way solenoid valve 6c through the cleaning liquid inlet 10c of the first chamber 3a into the first chamber 3a where the permanent magnet 4 does not exist. At this time, the cleaning liquid has a high water pressure and blows off the magnetic substance adsorbed on the surface of the suction pipe 12. The blown-off magnetic substance flows through the chamber 3a together with the cleaning liquid, and is discharged to the outside from the two-way solenoid valve 6d via the cleaning liquid discharge port 10d of the chamber 3a.

After that, when the permanent magnet 4 is moved to the chamber 3a, the two-way solenoid valves 6a and 6b are opened and the two-way solenoid valves 6c and 6d are closed in synchronization with this. In this state, next,
The inside of the second chamber 3b is cleaned.

Control is performed in a predetermined order by signals from the above-mentioned moving mechanisms and the control device T. The state of this control is
It is shown in the timing chart shown in the figure.

Incidentally, FIG. 5 shows a second embodiment of the present invention. The second embodiment is a two-way solenoid valve 6a, 6 of the first embodiment.
A three-way solenoid valve 60 is provided instead of c, and a two-way solenoid valve 6
A three-way solenoid valve 61 is provided instead of b and 6d. The second embodiment has the same configuration as that of the first embodiment except for steam, and in FIG. 5, parts corresponding to the first embodiment are designated by the same reference numerals. The explanation is omitted.

[Advantages of the Invention] As described above, according to the filter of the present invention, the filtrate switching supply mechanism is operated to pass the filtrate to the other chamber even while the surface of the suction pipe in one chamber is being cleaned. By using water, impurities can be continuously removed and discharged. Therefore, the filtration efficiency of the filter can be kept constant at all times. Further, since the control mechanism provided in the filter can be controlled by one control panel at the same time, the filter can be made compact. Further, since the magnet is pneumatically moved, the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a part of a filter according to the present invention, FIGS. 2 and 3 are side views of the cross-section of FIG. 1, and FIG. The figure which showed the permanent magnet in the accommodated state, FIG. 5 is the figure which showed the 2nd Example of this invention, FIG. 6 is the chart figure which showed the cycle of the filtration process of the filter of this invention. Is. 1 ... Filter body, 2a, 2b, 2c, 2d ... Two-way solenoid valve, 3a
...... First chamber, 3b ...... Second chamber, 4 ...... Permanent magnet, 5 ...... Partition, 6a, 6b, 6c, 6d ...... 2-way solenoid valve,
7a, 7b ... Air chamber, 8a, 8b ... Three-way solenoid valve, 12 ...
… Suction pipe, 13 …… Air port.

Claims (5)

(57) [Claims] 1. A filter body having a first filtration chamber and a second filtration chamber, and the first and second filtration chambers.
Is equipped with an adsorption conduit penetrating the inside of the filter chamber, and a magnetic substance contained in the filtrate that is slidably accommodated in the adsorption pipe in the axial direction and is circulated in the filtration chamber. A magnet for adsorbing to the surface of the adsorption pipe is provided, and the length of the magnet is set so that the magnet exists only in either one of the first and second filtration chambers. And a moving mechanism for selectively moving the first or second filtering chamber so as to be present in either one of the first and second filtering chambers. 2. The moving mechanism is characterized in that high pressure air is selectively supplied to both ends of the adsorption pipe and the magnet is selectively moved by the pressure of the high pressure air. The filtration device according to claim 1. 3. The magnet comprises a plurality of short cylindrical magnet elements and bolts and nuts that axially penetrate the magnet elements and connect the magnet elements. The filtration device according to claim 2. 4. The magnet has a washer interposed between the magnet elements, the outer diameter of the washer is formed to be larger than the outer diameter of the magnet element, and the outer circumference of the washer is the outer diameter of the washer. The filtration device according to claim 3, wherein the filtration device is in contact with the inner peripheral surface of the adsorption pipe. 5. A filtrate switching supply mechanism for selectively switching and supplying a filtrate into the filtration chamber of the first or second filtration chamber on the side where the magnet is present, and the magnet. 2. The filter device according to claim 1, further comprising a cleaning liquid supply mechanism for supplying a cleaning liquid into a filtration chamber in which no magnetic particles are present to remove and clean the magnetic substance adsorbed on the surface of the adsorption pipe.