JPH078007Y2 - Filtration tube holding device for filtration device - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a holding device equipped with a filter cylinder for cleaning contaminants such as polishing oil of working equipment, food oil, and liquid to be plated. The present invention relates to a tube holding device.

<Prior Art> The partition wall divides the liquid tank into a main tank for the liquid to be treated and a sub tank for the cleaning liquid.The main tank is provided with a supply port and the sub tank is provided with an outflow port. A filter material, such as a fiber material or a cloth material, is provided around the outer peripheral surface of the coil, and one or more stretchable filtration tubes each having one end as an open end and the other end as a closed end are vertically provided on a partition plate. The one with the open end communicating with the sub tank is
Proposed in 61-208683.

This structure filters the liquid to be treated with the filter medium of the filter cylinder, and when the filtration material layer becomes thick and the filtration efficiency decreases, the compressed gas is supplied to the inside of the filter cylinder to reduce the contraction state during the filtration process. The above-mentioned filter cylinder expands in the vertical direction by the restoring elasticity of the coil, so that the peripheral surface of the filter medium extends, and the filtration material layer can be easily separated and dropped.

An object of the present invention is to provide a holding device capable of reliably holding such a filter cylinder and improving the water sealability at its mounting portion.

<Means for Solving Problems> In the present invention, the diameter of the upper end of the coil of the stretchable filtration tube is expanded to form a diameter expansion locking portion, and a diameter reduction projection is provided above the locking portion. Along with coupling, the stretchable filter cylinder is inserted from above into the connection hole formed in the partition plate that partitions the sub-tank of the cleaning liquid,
The expanded diameter locking portion is hung from the periphery of the connecting hole and suspended, and a retaining plate having a through hole which is vertically aligned with the connecting hole is formed on the partition plate to fix the reduced diameter protruding portion of the coil. It is characterized in that it is elastically contacted with the periphery of the through hole.

<Operation> By attaching the holding plate to the partition plate, the diameter-reducing projection of the coil is elastically contracted, and the restoring elastic force causes the expanded-diameter locking portion of the coil to press-contact with the holding hole of the partition plate. Therefore, the filter cylinder is held by the partition plate without looseness.

<Embodiment> An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an example of a filtration device using a filtration cylinder 30.

Here, 1 is a liquid tank, and a circular arc bulging lid frame 3 is attached to the upper surface of a tubular body 2 having a flange formed on the upper portion thereof and fixed with bolts 4, and the lower portion of the tubular body 2 is A bottom frame 5 is fitted on the outer frame. Inner peripheral surface of the bottom frame 5 and tubular body 2
A liquid flow path 6 is formed between the peripheral surfaces of the above, and a supply port 7 communicating with the liquid flow path 6 is provided in the bottom frame 5. The supply port 7 is in communication with an inflow pipe 9 whose opening and closing is controlled by an opening / closing valve 8.
Further, a drain port 10 whose opening / closing is controlled by an opening / closing valve 11 is provided on the lower bottom of the bottom frame 5. Further, on the upper side wall of the tubular body 2, there is provided a liquid recovery port 17 which also serves as an air vent.

A locking protrusion 2a is formed on the inner surface of the upper portion of the tubular body 2,
A partition plate 13 having a plurality of connecting holes 12 into which the stretchable filter cylinder 30 is inserted from above is mounted on the locking protrusion 2a. The partition wall 13 allows the tubular body 2 to be formed in the liquid tank 1.
A main tank 22 for the liquid to be treated therein and a sub tank 23 for the clean liquid in the lid frame 3 are partitioned.

The filtration cylinder 30 has a long coil 31 with a tetron,
A filter material 32 made of a thermoplastic fiber material such as polypropylene or Teflon is provided around the coil, and as shown in FIG. 4 and FIG.
A diametrical expansion step portion 36a and a diameter-decreasing projection portion 36b whose diameter is reduced from the stepped portion 36a are formed on the mouth edge 33 of 31 so that the mouthpiece 33 can hold the filtration cylinder 30 without loosening as described later. I am trying. A plug member 34 made of a thermoplastic resin such as polypropylene is arranged at the lower end, and the edge of the filter medium 32 is welded to the lower surface thereof.

Thus, a stretchable filtration cylinder 30 having an upper end opened and a lower end closed and having elasticity in the longitudinal direction is configured. This filter cylinder 30
For example, a relatively thin one having a length of 100 mm to 500 mm and an outer diameter of 12 mm can be applied.

A method of manufacturing the above-described filter cylinder 30 will be described with reference to FIGS. 3 and 4.

FIG. 3 shows a sealing means for the lower end edge of the filter medium 32. That is, after the inner peripheral surface of the lower part of the filter material 32 is welded to the plug material 34, the third
As shown in FIG. I, the lower end is immersed in a heating liquid tank 38 containing a melt of polypropylene resin 37, and then taken out, and as shown in FIG. The rim and the plug member 34 are sealed with the polypropylene resin 37.

Next, an example of a means for joining the coil 31 and the filter medium 32 at the rim 33 will be described with reference to FIG.

As shown in FIG. 4I, the coil 31 has an enlarged diameter step 36a and a reduced diameter protrusion 36b formed in advance on the upper end thereof. And the third
In the joined state of the lower end of FIG. IV, the edge of the filter medium 32 is projected upward as shown in FIG. 4 II, and the projected edge is heated by a burner or the like. By this heating, the edge of the filter medium 32 is contracted by heat as shown in FIG. 4 III, and covers the diameter-reducing projection 36b and comes into close contact therewith. As a result, the filter medium 32 comes into close contact with the upper edge of the coil 31, and the rim 33 of the filter cylinder 30 is formed.

Such manufacturing means has an advantage that the filter cylinder 30 having a special shape that is difficult to process can be easily manufactured.

The number of the filter cylinders 30 can be set to one to several hundreds corresponding to the required processing capacity.

As shown in FIG. 5, the filter cylinder 30 is inserted into the connecting hole 12 formed in the partition plate 13 from above, and the mouth 33 is hung from the peripheral edge of the connecting hole 12 to be suspended. The connecting hole 12 has an inverted conical shape that substantially coincides with the expanded diameter stepped portion 36a of the coil 31, so that the filter cylinder 30 is locked with the expanded diameter stepped portion 36a in the connecting hole 12 and The diameter-reducing projection 36b at the upper end projects upward (FIG. 5I). Then, on the partition plate 13, a holding plate 15 having a through hole 14 which is vertically aligned with the connecting hole 12 is attached and connected to each other by a bolt 16. (Fig. 5 II). At the time of this connection, the diameter-reducing protrusion 36b of the coil 31 is pressed against the periphery of the through hole 14 to elastically contract, and the urging elastic force thereof causes the diameter-increasing stepped portion 36a.
Is pressed against the connecting hole, and the filter cylinder 30 is held without rattling. Therefore, the liquid to be treated, which does not permeate through the filter medium 32 of the filter cylinder 30 through the connecting hole 12, does not flow around the connecting hole 12 into the sub tank 23, so that the water sealing property is improved.

Thus, the sub-tank 23 of the cleaning liquid is formed in the lid frame 3 by being partitioned by the partition plate 13, and each filter cylinder 30 supported by the partition plate 13 has a connecting hole 12 and a through hole. Lid frame 3 through 14
It will communicate with the outlet 24 provided at the upper end.

The outflow port 24 is in communication with a treated tank (not shown) for collecting the clean liquid through an outflow pipe line 25. And outflow conduit
A three-way switching valve 26 that controls the flow of the clean liquid and a three-way switching valve 28 that controls switching to a pressurized gas supply source 27 that generates pressurized gas are provided at 25. The pressurized gas includes air, steam, nitrogen gas and the like. Air is usually used.

Next, the operation of the above filtering device will be described. When the open / close valve 8 and the open / close valve 26 are opened and the liquid to be treated flows in from the supply port 7,
The liquid to be treated flows from the through hole 6 into the main tank 22. The liquid to be treated passes through the filter medium 32 and flows into each of the filtration cylinders 30 and is subjected to a filtering action to become a clean liquid. The clean liquid filtered by the filter material 32 of the filter cylinder 30 flows into the sub tank 23 and flows out from the outlet 24 to a required portion via the pipe 25. During this filtering operation, the filter cylinder 30 is in a contracted state by the pressure from below as shown in FIG. 2I.

When the filtering operation is continued, a filter layer is formed on the surface of the filter medium 32, the filter medium 32 is clogged, and the water pressure in the liquid tank 1 rises. This increase in pressure is detected by a known pressure detecting means, and the next backwashing process is started.

That is, first, the on-off valve 8 and the on-off valve 26 are closed, the on-off valve 11 of the drain port 10 is opened, and the changeover valve 28 is changed over so that the gauge pressure from the pressurized gas supply source 27 is about 1 to 1.8 kg / cm ^2. The pressurized air of is communicated with the outlet 24.

Then, the cleaning liquid in the sub tank 23 and the filter cylinder 30 is discharged from the filter medium 32 due to the pressure thereof. At this time, since the internal pressure of the filter cylinder 30 becomes larger than the surrounding water pressure, the coil 31 that has contracted during the filtering process expands in the vertical direction as shown in FIG. 2 II due to the restoring elasticity. For this reason, even if the filtration material layer x is formed on the peripheral surface of the filter medium 32, cracks and peeling are generated in the filtration material layer x, and the cleaning liquid is jetted out and washed out. The liquid after this cleaning is drain port 10 or liquid recovery port 17
Emitted from.

When the liquid level in the filter cylinder 30 comes below the partition plate 13,
The pressurized air also acts on the liquid surface of the tubular body 2, causing the liquid surface to drop. In this case, when the liquid level drops, the pressure air permeates through the filter medium 32 from the inside of the filter cylinder 30 and is ejected toward the liquid surface side. Further, when the liquid surface drops due to the interfacial pressure of the liquid surface, the filter material has a peeling action. Accordingly, in combination with the extension of the filter cylinder 30, the filtration material layer x is effectively removed.

In the backwash process, first, the sub-tank 23 and the filter cylinder 30 are closed, and then atmospheric pressure or the like is applied to the liquid level in the tubular main body 2 to remove it, and then the sub-tank 23 and the filter cylinder 30 are removed. Pressurized air may be communicated with the inside of the filter 30 and jetted outward from the filter medium 32. That is,
After the liquid in the liquid tank 1 has flowed down, the cleaning liquid in each filter cylinder 30 closes the on-off valve 26, clogs the filter medium 32, and filters 32.
It is confined in the filter cylinder 30 by the action of atmospheric pressure from the outer peripheral surface. For this reason, after that, the liquid can be ejected from the filter medium 32 by connecting the pressurized air to the inside of the filter cylinder 30.

Even in this case, the filtration layer 30 is exfoliated due to the expansion of the filter cylinder 30.

The expansion and contraction action of the filtration cylinder 30 can be adjusted by setting the spring elasticity of the coil 18, and the expansion and contraction degree can be increased by lowering the spring pressure. For this reason, if it is made to contract greatly during the filtration process, it is possible to cause the restoring extension of the filtration cylinder 30 and to cause the peeling action by merely stopping the filtration process and stopping the flow of the liquid. become.

After the above-mentioned clean liquid flows out, the on-off valve 11 is closed, the switching valve 28 is switched, and the on-off valve 26 and the on-off valve 8 are opened, the liquid to be treated flows into the liquid tank 1, and the filtration work is restarted. It

<Effect of the Invention> As described above, according to the present invention, the filter cylinder is constructed by stretching the filter material on the circumferential surface of the coil. And a diameter reducing projection is formed above the locking portion to hold the diameter expanding locking portion between the partition plate and the holding plate, and the diameter reducing projection is provided around the through hole. Since they are elastically contacted, the expanded diameter locking part of the coil is pressed into contact with the retaining hole of the partition plate, the filter cylinder is held by the partition plate without looseness, and the liquid that does not permeate the filter medium flows from the connecting hole and flows into the sub tank. There is an excellent effect of improving the water sealing performance at this mounting portion.

[Brief description of drawings]

The accompanying drawings show an embodiment of the present invention. Fig. 1 is a vertical side view, Fig. 2 I and II are enlarged vertical side views showing the expansion and contraction action of the filter cylinder 30, and Fig. 3 I and II are the lower part of the filter cylinder 30. FIG. 4 is a manufacturing process drawing showing the sealing means, FIG. 4 is a manufacturing process drawing showing the forming means of the rim 33 of the filter cylinder 30, and FIG. 5 is an enlarged vertical side view showing the holding means of the filter cylinder 30. 1; liquid tank, 6; inlet hole, 7; supply port, 8; open / close valve, 10; drain port, 9; inflow pipe, 11; open / close valve, 22; main tank, 23; sub tank, 24; outlet , 26; open / close valve, 27; pressurized gas supply source, 30; filter cylinder, 31; coil, 32; filter material, 33; rim, 34; plug material, 36a; expanded diameter step portion, 36
b; Reducing projection

Claims (1)

[Scope of utility model registration request] 1. A partition wall plate divides the inside of a liquid tank into a main tank into which a liquid to be treated flows and a sub tank for cleaning liquid. The main tank is provided with a supply port and the sub tank is provided with an outlet. A filter material, such as a fiber material or a cloth material, is provided around the outer peripheral surface of the long coil, and one or more stretchable filter cylinders having one end as an open end and the other end as a closed end are hung on the partition plate. And the opening end of which is communicated with the sub tank, the upper end of the coil of the elastic filtration tube is expanded in diameter to form an expanded diameter locking portion, and the diameter is further reduced above the locking portion. Along with connecting the protrusions, the stretchable filter cylinder is inserted from above into the connection hole formed in the partition plate that partitions the sub-tank of the cleaning liquid, and the diameter expansion locking part is hung on the periphery of the connection hole and suspended. Then, a retaining plate having a through hole that is vertically aligned with the connecting hole is formed on the partition plate, and the reduced diameter projection of the coil is elastically contacted around the through hole. A filtration tube holding device for a filtration device, characterized in that