JPH063409U - Disposable capsule filter for filtration of liquid containing organic solvent - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention reliably vents air to prevent air from being mixed into the slurry, and to provide a stable product. It is an object of the present invention to provide a disposable capsule-type filter that eliminates the risk of polluting the surrounding environment. In this invention, an automatic air vent valve is provided on the upper part of a disposable capsule type filter, the automatic air vent valve is provided with an air vent port on the upper part, and a liquid inlet is formed on the lower part, and the tubular member. Having a floating ball that rises due to hydraulic pressure inside the sheet, and is formed of an elastic material that swells with an organic solvent, or swells with an organic solvent between the floating ball and the air vent It is characterized in that a valve body made of an elastic material is interposed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is equipped with an automatic air-bleeding valve used for filtering industrial liquids containing organic solvents as a main component, such as magnetic paints containing methyl ethyl ketone (MEK) as a main component for video tape production lines, printing inks, etc. It relates to a disposable capsule type filter.

[0002]

[Prior art]

 The basic method of producing a video tape is a method in which magnetic powder and a binder are made into a slurry with an organic solvent, and while the slurry is filtered by a filter, the slurry is applied to a base polyester film and dried. Since the organic solvent used in this process is a strong solvent mainly composed of MEK, it emits a strong foul odor when the filter element is replaced, which may impair the health of workers, and the slurry may come into contact with oxygen. Since it solidifies and adheres to the filter, and it takes a lot of time and effort to remove the adhered slurry, the disposable capsule type filter that discards the used filter together with the container has become the mainstream these days. .

When filtering slurry with this capsule type filter, if air inside the filter is not quickly removed, air will enter the slurry and crater-like parts will be generated in the coating film, causing dropout of video tape. Contribute to. In order to prevent this, conventionally, as shown in FIG. 5, a blind plug 2 is attached to the upper part of the capsule filter 1 so that the timing at which the slurry rises to the uppermost part of the capsule filter, that is, the timing at which the air is completely removed. As a visual aid, the blind plug 2 was tightened and a means for initiating permeate filtration was taken. However, in this method, it is extremely difficult to completely remove the air to tighten the blind plug 2, and if the tightening is delayed, the slurry leaks, and the leaked slurry contacts the air and solidifies in a short time. There was a problem of deteriorating the environment, and there was a problem that air was mixed into the slurry if tightening was done too early.

[0004]

[Problems to be solved by the device]

 The present invention was made with this point in mind.It reliably vents air to prevent air from being mixed into the slurry and provide a stable product. It is an object of the present invention to provide a disposable capsule-type filter equipped with an automatic air valve that eliminates the risk of spillage and contamination of clothes and the surrounding environment.

[0005]

[Means for Solving the Problems]

 The structure of the present invention which meets the above-mentioned object is a disposable capsule type filter having a liquid inlet and a discharge port at its lower end and a filter cartridge accommodated in the inside thereof, and an automatic air vent valve is provided above the capsule type filter. A tubular body having an air vent port in the upper part and a liquid inlet port in the lower part; and a floating ball which is installed in the tubular body and is raised by hydraulic pressure. The floating ball is formed of an elastic material that swells with an organic solvent, or a valve element made of an elastic material that swells with an organic solvent is interposed between the floating ball and the air vent port. To do.

[0006] In summary, the present invention provides an automatic air bleeding valve, in which a floating ball floats up by buoyancy when the liquid containing an organic solvent in the capsule filter is filled from the lower part to the upper part, and the valve closed by the floating ball. It is composed of a body and an elastic material that swells with an organic solvent is used for this valve body, and during filtration through liquid, the valve body is fixed to the air vent by swelling and a reliable seal is made. Is. In the present invention, the effect is further enhanced by using an elastic material that also swells floating balls. Also, if the liquid to be filtered has a high viscosity, it will be difficult for the liquid to leak, so if the floating ball is made of an elastic material that will swell, the floating ball will have the function of the valve body. It doesn't matter if you don't. Examples of the elastic material that is swollen by the organic solvent used in the present invention include NBR rubber, BR rubber, and SBR rubber.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a sectional view of a disposable capsule type filter of the present invention, and FIG. 2 is an enlarged view of the automatic air vent valve of FIG. A filter cartridge 14 is installed in a filter container 13 having an inlet 11 for liquid to be filtered and an outlet 12 for filtered liquid at the lower end, and an automatic air vent valve 15 is provided at the upper end of the filter container 13. Is provided. As shown in FIG. 2, the automatic air vent valve 15 includes a cylindrical tubular body 17 fixed to an upper end opening (liquid inlet) 16 of a filter container 13, and a floating ball 18 provided in the tubular body 17. An example is shown in which a poppet valve 20 is provided between the floating ball 18 and the air vent 19 at the upper end of the tubular body 17, and the poppet valve 20 is made of an elastic material that swells with an organic solvent. A concave groove 21 that serves as a guide when the floating ball 18 rises is provided opposite to the inner peripheral surface of the cylindrical body 17.

Since the poppet valve 20 swells with an organic solvent, in order to reinforce the poppet valve 20, a circular dish-shaped solvent resistant reinforcing material 22 is fixed to the bottom surface of the poppet valve. In the present invention, the poppet valve 20 may be omitted if the floating ball 18 is made of an elastic material that swells with an organic solvent. In this case, a rod-shaped body made of an elastic material that swells with an organic solvent is continuously provided at the upper end of the floating ball 18, the rod-shaped body is fitted into the air vent 19, and the concave groove 21 that serves as a guide for the floating ball is omitted. You can also do it.

When the above filter is used to filter a low-viscosity slurry of 100 cps or less, a small amount of leakage may occur in the initial stage of filtration because the poppet valve chatters due to vibration. In this case, as shown in FIG. 3, one or both of the contact surfaces between the upper end flat surface of the poppet valve 20 and the cylindrical body 17 are instantly tacky by an organic solvent, such as vinyl chloride. It is advisable to attach the resin plate 23. According to this structure, the contact surfaces are instantly adhered to each other by virtue of the adhesiveness, and it is possible to effectively prevent liquid leakage due to chattering of the poppet valve.

[0010]

[Action]

 Next, a test example in which the operation of the automatic air bleeding valve of the present invention was tested by filtering paint having a viscosity of 400 cps containing MEK solvent as a main component using the filter of the present invention is shown. The filter used in the test is the same as the filter shown in FIGS. 2 and 3 except that the filter container 13 and the tubular body 17 are made of polypropylene resin which is an organic solvent resistant thermoplastic resin, and the float 18 is slightly solvent resistant. EPDM rubber was used, the poppet valve 20 was made of NBR rubber, and polypropylene resin was used as the reinforcing material 22 of the poppet valve 20.

The paint is introduced at a speed of 3 minutes per minute by a pump from the inflow port 11 at the lower end of the capsule type filter of the present invention shown in FIGS. 1 and 2 above, and the operation of the automatic air vent valve 15 at the upper part of FIG. 2 is observed. Then, about 1 minute after the start of operation, all the air inside was pushed out, and at the same time, the floating ball 18 floated up and pushed the poppet valve 20 to the uppermost part. At this time, no liquid leakage was observed. After 3 minutes from the start of operation, the pump was once stopped and the pump was turned on and off 10 times. The poppet valve 20 did not move at all due to swelling, and of course no liquid leakage was observed. After that, the portion of the automatic vent valve 15 was disassembled, and the swelling degree of the poppet valve 20 was measured. As a result, the volume was increased by about 30%.

Next, using the capsule filter of the present invention shown in FIG. 3, a low viscosity paint containing MEK solvent as a main component and having a viscosity of 20 cps was filtered to test the air bleeding and sealing properties of the filter. . The filter used in the test is the capsule type filter shown in FIG. 3, in which the contact surfaces of the poppet valve 20 and the cylindrical body 17 are vinyl chloride plates 23 adhered to each other. Others were made of the same material as the filter shown in FIG.

Similarly to the above, the paint was introduced at a rate of 3 minutes per minute from the inflow port 11 at the lower end of the capsule filter, and the operation of the automatic air vent valve 15 at the upper part of FIG. 3 was observed. About one minute after the start of operation, all the air inside was pushed out, and at the same time the floating balls 18 floated up, pushing up the poppet valve 20 to the uppermost part, and the two vinyl chloride resin plates 23 were in close contact. After 3 minutes from the start of the operation, the pump was stopped once, and the pump was turned on and off repeatedly 10 times to confirm liquid leakage. As a result, some liquid bleeding was observed up to the third ON / OFF, but after that, it was completely sealed. Then, as in the above-mentioned test, the automatic air vent valve 15 was disassembled and observed. As a result, the soft vinyl chloride plates 23 were completely adhered due to the viscosity, and at the same time, the NBR rubber was swollen by about 30%. In addition, the poppet valve 20, as shown in FIG. 4, spreads over the upper portion of the automatic air vent valve 15 and was fixed.

[0014]

【effect】

 As described above, according to the present invention, with the extremely simple structure of using a material that swells with an organic solvent, air can be automatically removed from the inside of the capsule filter, which has conventionally relied on the intuition of workers. Moreover, the valve is completely fixed after the air is deflated, so that there is no backflow of air, which is an extremely epoch-making effect not seen in conventional capsule filters of this type.

[0015]

[Submission date] September 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The paint is introduced at a rate of 3 liters per minute by a pump from the inflow port 11 at the lower end of the capsule type filter of the present invention shown in FIGS. 1 and 2, and the automatic air vent valve 15 at the upper part of FIG. 2 is operated. As a result of observation, about 1 minute after the start of operation, all the air inside was pushed out, and at the same time, the floating ball 18 floated up, pushing the poppet valve 20 to the uppermost position. At this time, no liquid leakage was observed. After 3 minutes from the start of operation, the pump was temporarily stopped and the pump was turned on and off 10 times. The poppet valve 20 did not move at all due to swelling, and of course no liquid leakage was observed. Then, the portion of the automatic air bleeding valve 15 was disassembled, and the swelling degree of the poppet valve 20 was measured. As a result, the volume was increased by about 30%.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

In the same manner as described above, the above paint was flowed in at a rate of 3 liters per minute from the inflow port 11 at the lower end of the capsule filter, and the operation of the automatic air vent valve 15 at the upper part of FIG. 3 was observed. About one minute after the start of operation, all the air inside was pushed out, and at the same time, the floating ball 18 rose, pushing up the poppet valve 20 to the uppermost part, and the two vinyl chloride resin plates 23 were in close contact. After 3 minutes from the start of operation, the pump was temporarily stopped, and the pump was turned on and off 10 times to check for liquid leakage. As a result, young bleeding bleeding was observed up to the third ON / OFF, but after that, it was completely sealed. After that, in the same manner as the above-mentioned test, the automatic air vent valve 15 was disassembled and observed. As a result, the soft vinyl chloride plates 23 were completely adhered due to the viscosity, and at the same time, the NBR rubber was swollen by about 30%. As shown in FIG. 4, the poppet valve 20 was spread over the upper portion of the automatic air bleeding valve 15 and fixed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of the air vent valve of FIG.

FIG. 3 is a cross-sectional view showing another example of the air vent valve of the present invention.

FIG. 4 is a cross-sectional view showing a state after using the air vent valve of the present invention.

FIG. 5 is a cross-sectional view showing air venting of a conventional capsule filter.

[Explanation of symbols]

13 Filter Container 14 Filter Cartridge 15 Automatic Air Venting Valve 17 Cylindrical Body 19 Air Venting Port 20 Poppet Valve 22 Solvent Resistant Reinforcing Material 23 Material that Adhesive by Organic Solvent (Vinyl Chloride Resin Plate)

Claims (3)

[Scope of utility model registration request] 1. A liquid inlet and a liquid outlet are formed at a lower end,
In a disposable capsule type filter having a filter cartridge accommodated therein, an automatic air vent valve is provided on the upper part of the capsule type filter, the automatic air vent valve is provided with an air vent port on the upper part and a liquid inlet port on the lower part. A body and a floating ball that rises due to hydraulic pressure inside the tubular body, and is formed of an elastic material that swells with an organic solvent, or between the floating ball and the air vent port. A disposable capsule filter for filtration of a liquid containing an organic solvent, characterized in that a valve body made of an elastic material that swells with an organic solvent is interposed between the two. 2. The disposable capsule type filter according to claim 1, wherein a solvent resistant reinforcing material is attached to the lower end of the valve body. 3. A material in which the valve body is a poppet valve, and a contact surface between an upper flat surface of the poppet valve and the cylindrical body is adhered by an organic solvent to make the contact surface adhere, The disposable capsule filter according to claim 1, which is attached.