JP5554553B2 - Filter device and replacement method thereof - Google Patents

Description

    The present invention relates to a panel-sealed filter device used in an exhaust device, and more particularly, to a filter device that can be easily replaced without causing hazardous substances to adversely affect an operator when the filter device is replaced.

    In general, when conducting an experiment for handling a dangerous substance (hazardous substance) or an experiment in which a dangerous substance is generated during the experiment, the dangerous substance may be scattered and filled in the laboratory, which may adversely affect the experimenter. In order to prevent this, for example, an experiment is performed by installing an exhaust apparatus having a configuration as shown in FIGS. 21 and 22 in the laboratory.

    The exhaust device of FIG. 21 has the following configuration. That is, in FIG. 21, 50 is the inside of the laboratory, 51 is the exhaust device main body, 52 is the rear panel, 53 is the area where the exhaust device is tested and contaminated by dangerous substances, 56 is the filter device for removing dangerous substances, Reference numeral 57 denotes a window used when the filter device is replaced. The filter device 56 is installed inside the window 57 (on the side opposite to the area where the experiment is performed).

    The filter device 56 used here is a hepa filter (HEPA filter), a Ulpa filter (ULPA filter), or the like, but hereinafter simply referred to as a conventional filter device 56. The conventional filter device 56 includes a filter arranged in a vertical direction as shown in FIG. 21 and a filter arranged in a horizontal direction as shown in FIG. 22, which are called a vertical filter and a horizontal filter, respectively. To do.

    The exhaust device shown in FIG. 21 has a vertical filter device installed as a conventional filter. When performing an experiment in an area 53 where an experimenter in the laboratory 50 works, an experiment is performed as indicated by an arrow. Air that is sent from the room into the working device passes through the work area 53, passes through the filter device 56, and is removed from the exhaust port 55 after the contaminant is removed by the filter device 56 to obtain normal air without contamination. To be discharged. Thereby, the air discharged from the exhaust port 55 does not contain contaminants.

    Thus, the experiment using the exhaust device is performed in the work area 53 in the air flow as described above by the movement of the exhaust device, and the pollutant does not flow into the laboratory 50. Experiments and work that are safe for experimenters and workers can be performed.

In such an exhaust device, when the filter 56 is replaced, a window 57 provided on the back panel 58 of the exhaust device is opened. In this case, it is necessary to replace the dangerous substance adhering to the contaminated filter surface of the filter device so that it does not escape to the outside. Also, as a conventional filter device shown in FIG. Similarly to the exhaust apparatus of FIG. 21, the apparatus is a laboratory 50, 51 is an exhaust apparatus main body, 52 is a back panel, 53 and 54 are areas for performing experiments (contamination area), and 55 is an exhaust port. However, the exhaust device provided with the horizontal filter device of FIG. 22 is slightly different in the portion where the filter is arranged, and has a configuration as illustrated.

    Accordingly, the air flow is as shown by the arrows in FIG. 22, and the contaminated air passes through the areas 53 and 54 where the experiment is performed, and flows upward from the lower side of the filter device through the filter device. And discharged from the discharge port 55.

    In the exhaust device provided with such a conventional filter device, the replacement operation of the filter device will be sequentially described for the vertical type and the horizontal type.

    Among the exhaust devices, the exhaust device in which the vertical filter device is arranged is the exhaust device shown in FIG. 21, while the exhaust device in which the horizontal filter device is arranged is the exhaust device shown in FIG.

    Among these exhaust devices, the exhaust device provided with the vertical filter device shown in FIG. 21 has the following configuration.

    In FIG. 21, 50 is a laboratory, 51 is an exhaust device, and is placed in the laboratory 50. This exhaust device 51 has a back panel 52, the front side 53 of which is used for the experiment, the hazardous material used in the experiment and the contaminated area caused by the dangerous material, and 55 is the exhaust port. As shown in FIG. 21, the exhaust device provided with the vertical filter device has a filter device 56 attached to the back panel 52.

    In the exhaust device provided with the vertical filter device, as shown in FIG. 21, air flows from the laboratory 50 into the contaminated area 53 of the exhaust device, passes through the filter device 56, and is discharged from the discharge port 55. Accordingly, the polluted air is discharged from the discharge port after the pollutant is removed by the filter device 56. As shown in FIG. 21, air flows from the laboratory 50 into the contaminated area 53 of the exhaust device, passes through the filter device 56, and is discharged from the discharge port 55. Therefore, the contaminated air is discharged from the discharge port 55 after the contaminant is removed by the filter device 56.

    21 is provided with a bag port as shown in FIGS. 24 and 25, and the bag 62 is attached in a folded state. That is, in FIG. 25, the bag 62 is attached in a state of being folded and sealed with the O-ring 61.

    Here, when replacing the filter device 56, the lid provided on the window is removed, the bag 62 shown in FIG. 25 is opened as shown in FIG. 26, and the filter device 56 is opened by the opened bag 62 as shown in FIGS. After covering, seal with a string or the like, cut the center of the seal and replace.

    Similarly, in the horizontal filter device shown in FIG. 22, reference numerals 53 and 54 denote experimental areas (contamination areas), and the filter device 56 is attached as shown in FIG. That is, the filter device 56 is fixed by being pressed onto the floor 59 by the filter 58 with the filter holder 57 through the packing.

    Here, the knob 58 is loosened to remove the filter device 56, while the bag port bag 62 shown in FIG. 28 is opened and the filter device 56 is covered with the bag 62 as shown in FIGS. 29 and 30. Seal and replace the filter to prevent dangerous substances from going outside.

JP, 2000-271418, A The exchangeable HEPA filter indicated in the above-mentioned patent documents 1 is indicated as a HEPA filter as an example of a filter device used with an exhaust device of the present invention.

    The HEPA filter of this document is used by being connected in an exhaust duct. Therefore, the exhaust device according to the present invention is completely different from the disposing means and the structure for disposing (connecting means and the structure for connecting), and the means for exchanging the HEPA filter is completely different.

    The conventional filter device described above has the drawbacks that the replacement work is troublesome, the replacement takes time, and the bag is torn to cause a risk.

    The present invention has been made in order to eliminate this drawback, and provides a filter device that can be replaced in a short time without being concerned about contamination by dangerous substances, with a very simple replacement operation. .

    The present invention has been made to eliminate the drawbacks of the conventional filter device, and is provided in the exhaust device by providing a flange having a screw hole in the outer peripheral portion (frame supporting the filter surface) of the filter surface of the filter device. In the configuration to be fixed, a plate for covering the filter surface is additionally provided, and when replacing the filter device, the filter surface is covered with the plate, and the periphery is sealed by appropriate means, and then the fixing is released. It is characterized by being removed and replaced.

    This allows the filter surface of the filter device to which the dangerous substance is attached to be covered and sealed with a plate so that the dangerous substance does not come out and can be exchanged so that the dangerous substance does not come out from the filter device. In addition, the device fixed through the screw hole of the flange can be easily replaced by simply closing the screw.

    The filter device of the present invention has the effect that the filter surface contaminated with the dangerous substance is simply covered with a plate and sealed, and can be easily replaced, and there is no danger due to the dangerous substance.

Sectional drawing of Example 1 of the filter apparatus of this invention Front view of the filter device shown in FIG. The enlarged view of the location shown by the arrow A of the filter apparatus shown in FIG. The front view of the filter of the filter apparatus shown in FIG. The top view of the 1st plate used at the time of replacement | exchange of the filter apparatus of this invention Sectional drawing which shows the state which attached the 1st plate of the filter apparatus shown in FIG. 2nd plate used at the time of filter apparatus replacement | exchange of the filter apparatus of Example 1 of this invention Sectional drawing which shows the state which attached the 1st plate and the 2nd plate to the filter shown in FIG. Sectional drawing of the filter apparatus of Example 2 of this invention The front view of the filter of the filter apparatus shown in FIG. 9 of Example 2 of this invention The enlarged view of the location shown by the arrow C of the filter apparatus shown in FIG. The front view of the pre filter of the filter apparatus shown in FIG. The front view of the 3rd plate used at the time of filter apparatus replacement | exchange of the filter apparatus shown in FIG. Sectional drawing in the state which attached the 3rd plate of the filter apparatus shown in FIG. The figure which shows the structure of the filter apparatus of Example 3 of this invention. The figure which shows a structure when the 4th plate is attached to the filter apparatus shown in FIG. The figure when the sheet | seat of the filter apparatus of Example 4 of this invention is used. The figure which shows the state which folded the sheet | seat in the filter apparatus of FIG. The figure which shows the state sealed with the sheet | seat of the filter apparatus of FIG. The figure which shows the other example of the folding means of a sheet | seat in the filter apparatus of FIG. The figure which shows the structure of the exhaust apparatus which attached the filter apparatus vertically in an example of the exhaust apparatus generally used The figure which shows the structure of the exhaust apparatus which attached the filter sideways in the other example of the exhaust apparatus generally used The figure which shows the structure of the conventional horizontal filter apparatus The enlarged view which shows the part of the window of the exhaust apparatus shown in FIG. FIG. 21 is an enlarged view of the bag port of the exhaust device of FIG. The enlarged view of the state which opened the bag of the exhaust apparatus of FIG. The figure which shows the filter replacement | exchange operation | work with the exhaust apparatus shown in FIG. 22 is an enlarged view of the bag port of the exhaust device of FIG. The enlarged view of the state which opened the bag of the exhaust apparatus of FIG. The figure which shows the filter exchange work in the exhaust apparatus shown in FIG.

    Embodiments of the present invention will be described in detail with reference to examples shown in the drawings.

    Embodiment 1 of the present invention is as shown in FIGS. 1 to 8, FIG. 1 is a sectional view of the filter device of Embodiment 1, FIG. 2 is a front view of the filter device of Embodiment 1, and FIG. FIG. 4 is an enlarged view of the configuration indicated by the arrow A, FIG. 4 is a front view of a filter used in the first embodiment, and FIG. 5 is a plan view of a plate (first plate) used in the filter device of the first embodiment. 6 is a cross-sectional view of the filter of Example 1 when the first plate is attached, FIG. 7 is a plan view of another plate (second plate) used in the filter device, and FIG. 8 is shown in FIG. It is sectional drawing of the state which attached the 1st, 2nd plate to the filter of the filter apparatus.

    The filter device of Example 1 has the configuration as shown in FIG. 1 or FIG. 8, and was assembled using the components (members) shown in FIG. 2, FIG. 4, FIG. 5, FIG. Is. Therefore, the shape and structure of each of these parts and the assembly of the filter device using the same will be described in detail below.

    A filter device 1 shown in FIG. 1 has a configuration in which a flange 3 is provided around a filter 2, and a hole 3 a is provided in the flange 3. In FIG. 1, the filter 2 is screwed to the back panel 52 by a screw 4 via a flange 3 to the back panel 52 of the exhaust device as shown in FIG. 3. Further, the prefilter 6 is screwed and attached to the rear panel 52 of the exhaust device with a screw 8 through a packing 7. In FIG. 1, reference numeral 6 denotes a pre-filter, and the shape of the pre-filter 6 viewed from the front is as shown in FIG. A hole 6a is formed around the prefilter 6, and a packing 7 is disposed so as to maintain airtightness as shown in the enlarged view of FIG.

    As shown in FIG. 3 showing a part of the filter 2 and the pre-filter 6 in an enlarged manner, the filter 2 is screwed to the rear panel 52 of the exhaust device using bolts or the like via the flange 3 and the pre-filter 6 via the packing 7. Stopped and attached. 3 is a contaminant that adheres to the front surface of the filter 2, but this contaminant is attached to the flange 3 because the prefilter 6 is provided with a packing 7 and this part is sealed. Absent. Here, the screws 4 and 8 for fixing the filter 2 and the pre-filter 6 to the back panel 52 are not penetrated by the screw holes, and keep the sealed state. Further, the screw to be attached at this time has a tip that is the same surface as the flange surface.

    The filter device according to the first embodiment of the present invention having the above configuration is used by being attached to, for example, the rear panel 52 of the exhaust device as shown in FIG. That is, the filter device 1 of the present invention is attached in place of the conventional filter device 56 shown in FIG. Thus, the air flow passes through the contaminated area (working area) 53 of the exhaust device, passes through the filter device 1 of the present invention, and is discharged from the discharge port 55.

    Therefore, as for the filter apparatus 1, the surface (surface by the side of a work area) into which the air flows in is contaminated.

    The operation of replacing the filter device fixed to the back panel 52 as shown in FIG.

    When replacing the vertical filter device attached to the back panel as shown in FIG. 21 with the configuration shown in FIG. 3, first, the screw 8 shown in FIG. 3 is loosened, and the prefilter 6 is removed. The sealing plate (first plate) 5 covers the filter surface of the filter device 1, that is, the surface on which the dangerous substance 10 is adhered, and the periphery thereof is sealed by an appropriate means. Then, the screw 4 of the flange part 3 is loosened and removed. Further, the second plate 9 shown in FIG. 7 is arranged in front of the filter 2, and other screws (bolts and nuts) are used using the holes 3 a of the flange 3 and the holes 9 a of the second plate 9. Fix it. In this way, the filter 2 seals the surface to which the contaminants 10 are adhered with the first plate, and further seals the surface with the contaminants on the periphery thereof to the second plate 9. As a result, the contaminated portion of the filter device 1 can be taken out in a state of being sealed by the first plate 5 and the second plate 9 and can be taken out without scattering of the pollutant.

    After that, a new filter device is attached to the back panel 52, thereby completing the filter replacement. Furthermore, the pre-filter is fixed with screws.

    As described above, the filter device of Example 1 is simply placed on the filter surface, sealed around the periphery, and unscrewed to completely seal the contaminated portion. It can be exchanged and can be exchanged extremely safely without scattering of pollutants. Furthermore, the second plate can be securely sealed by arranging the second plate.

    The series of filter device replacement operations in the first embodiment described above can be performed while the exhaust device is exhausted.

    Moreover, the arrangement of the first plate 5 and the second plate 9 can be exchanged by a very simple and simple operation such as sealing or removing screws.

    Embodiment 2 of the filter device according to the present invention is as shown in FIGS. 9 to 14. Of these drawings, FIG. 9 is a sectional view of the filter device, FIG. 10 is a front view of the filter, and FIG. Fig. 12 is an enlarged view of part C, Fig. 12 is a front view of the prefilter, Fig. 13 is a plan view of a third plate for sealing the contaminated surface of the filter, and Fig. 14 shows a state in which the filter device is sealed. FIG.

    The figure which shows this Example 2 combines each member which the filter apparatus of Example 2 of this invention shows similarly to the figure which shows Example 1. FIG.

    In the filter device of the second embodiment, as shown in FIG. 10, two types of screw holes, a screw hole 11a and a hole 11b, are provided in the periphery of the filter 11. Further, the prefilter 16 shown in FIG. 12 is provided with a hole 16a. Further, the third plate 15 is formed with attachment holes 15a and through-holes 15b, and the shape of the filter device is slightly different from that of the first embodiment, but the basic shape of each member is the same as that of the first embodiment. .

    Similarly to the first embodiment, the second embodiment is a combination of the above-described members, and the formation of the filter device by combining the respective members will be described in detail.

    In the filter device of the second embodiment, the filter 11 is attached to the back panel 52 using the attachment hole 11b of the filter 11 as shown in FIG. 11, and the prefilter 16 is attached to the back panel 52 using the attachment hole 16a. The filter device is assembled and fixed to the window of the exhaust device by screwing with the screw 14 through the packing 17. Here, the screw hole of the screw 14 is not penetrated so as not to be contaminated. Also in the second embodiment, a packing 17 is provided around the prefilter 16 so that contaminants do not adhere.

    Here, when exchanging the filter device, first, the pre-filter 16 is loosened with the screws 14 and removed from the rear panel 52, and then the third plate 15 is provided with the screw holes 11a provided on the flange surface using the attachment holes 15a. It is attached to the filter by fixing it to the filter, so that the pollutant 10 is sealed and sealed, so that the pollutant 10 does not come out. That is, the configuration is as shown in FIG. In this state, using the through hole 15b of the third plate 15, the screw 12 fixing the filter 11 on the back panel 52 is loosened, and the filter 11 is fixed to the back plate while the third plate 15 is fixed. Remove from 52 and replace the filter.

    Thus, the filter 11 is removed from the back panel 52 while the surface contaminated with the contaminant 10 of the filter 11 is sealed with the plate 15, and the filter device is replaced.

    In the filter device according to the second embodiment, the filter is exchanged in a state in which the contaminant is sealed by the third plate 15 screwed to the front surface of the filter, so that contamination to the outside due to the contaminant can be prevented. . In the filter device of the second embodiment, the plate is fixed to the filter by screwing, and the filter device is removed and replaced by loosening and removing the screw 12 that fixes the filter to the back panel. However, it is possible to perform a safe replacement in a short time with the exhaust device exhausted.

    The filter device according to the third embodiment of the present invention is applied to a horizontal filter device of a type placed in an exhaust device as shown in FIG. 22 and has a structure as shown in FIGS.

    As shown in FIG. 15, this filter device has a flange surface slightly above the lower surface of the filter 21, a gasket 23 is affixed to the flange surface, and the filter is pressed against the filter mounting surface on the upper flange 22. A metal fitting 24 is fixed with a screw 25. Reference numeral 26 denotes a knob for pressing the filter. By tightening the knob 26, the area between the contaminated area and the normal area due to the packing 23 is sealed. Reference numeral 27 denotes a pre-filter provided under the filter.

    The pre-filter having the above-described configuration is removed, and the contaminated surface sealing fourth plate 30 is attached to the contaminated surface of the filter surface using the screw hole 28 at the bottom of the filter to seal the contaminated filter surface. After that, the filter 21 is inserted between the filter mounting surface 58 of the main body and a filter removing bar is inserted to remove the filter. Then, the screw 25 fixing the flange of the filter and the metal fitting 24 is removed, and the filter replacement port 57 is removed. Take out and replace.

    In the third embodiment, similarly to the first and second embodiments, the contaminated surface to which the dangerous substance of the filter is attached is sealed by screwing the fourth plate 30 so that the contaminant does not leak out. After that, the filter device is replaced.

    Therefore, the filter device can be safely replaced without being contaminated by dangerous substances.

    Also, most of the work of attaching the fourth plate and the other work when replacing the filter device is a simple work such as screwing, and the replacement is easy and can be performed in a short time.

    A filter device according to a fourth embodiment of the present invention will be described with reference to FIGS. 17, 18, 19, and 20.

    Similarly to the third embodiment, the filter device of the fourth embodiment is also a horizontal type horizontal filter device.

    In the filter device of Example 4, as shown in FIG. 17, a cylindrical sheet 41 is provided on the lower surface of the filter body on the side where contaminated air flows, and the sheet 41 is folded and fixed with a band 42. However, the apparatus is configured as shown in FIG. This is used in the arrangement as shown in FIG.

    Replacement of the filter device of Example 4 shown in FIG. 18 contaminated by use is performed as follows.

    First, as shown in FIG. 17, the band 42 is removed and the folded sheet 84 is expanded and further sealed so that the contaminated portion of the sheet is completely folded into the sheet. As a result, all contaminated portions are sealed in the sheet 41. In this state, the filter device of Example 4 is removed and replaced.

    As described above, in the filter device of Example 4, all the contaminated portions to which the hazardous substances are attached are sealed in the sheet, there is no contaminated portion outside, and there is no possibility of the contaminants leaking out.

    As described above, the filter device according to the fourth embodiment of the present invention can also be safely replaced without causing dangerous substances to leak outside during replacement.

    The operation is also a simple operation of simply removing the sheet and folding and sealing so that the contaminated portion of the sheet is folded into the sheet.

    In the fourth embodiment, as shown in FIG. 20, the sheet may be housed in a frame member 45 and held so as to be sealed. As a result, the contamination of the sheet is more reliably prevented.

    In the filter device shown in FIGS. 17 to 20, a horizontal filter device is provided with a sheet, and the filter device is covered with the sheet and sealed for replacement. You may make it seal the filter apparatus contaminated with the sheet | seat.

    As described above, during the experiment in the exhaust device, the dangerous substance is removed by passing the air flow containing the dangerous substance through the filter device, and is discharged from the discharge port as a normal air flow. For this reason, the attachment of dangerous substances in the filter device is mainly at the air inlet or the surrounding area. However, dangerous substances may adhere to the outflow side of the filter device. Therefore, when exchanging the filter device, it is more preferable to exchange the confined dangerous substance on the side opposite to the inlet.

    For this reason, it is desirable to apply a similar sealing device on the outflow side opposite to the inflow side. In other words, it is desirable that the outflow side of the filter device has the same configuration as the inflow port and can be sealed with a plate or the like.

    The filter device of the present invention is installed in an exhaust device used for experiments involving harmful substances or experiments in which harmful substances are generated, and is intended to remove harmful substances. The surface to which harmful substances adhere is sealed so that the substances are not exposed to the outside. Thereby, it can replace | exchange safely, exhausting with an exhaust device.

DESCRIPTION OF SYMBOLS 1 Filter apparatus of Example 1 of this invention 2 Filter 3 Flange 4 Screw which attaches the filter apparatus in Example 1 to a back panel 5 1st plate 6 Pre-filter 9 2nd plate 11 Filter apparatus of Example 2 of this invention 12 Screws for attaching the filter device in Embodiment 2 to the back panel 15 Third plate 21 Main device of Embodiment 3 of the present invention 30 Fourth plate

Claims (3)

A filter device hazardous substances handled experiments or harmful substances is installed in an exhaust system for use in the experiments that occur,
A filter to remove harmful substances,
A flange provided around the filter and integrated with the filter;
Including at least one plate for covering the filter and the harmful substances remaining on the periphery thereof, and
In the state where the exhaust device exhausts the filter device, at least one of the plates is attached to the flange, so that at least one of the plates is attached with a harmful substance or a contaminated portion with a harmful substance. It can be replaced without leaking harmful substances to the outside after sealing
Wherein comprises at least one plate are two plates, one of which is, the filter medium surface and shape of the filter of the filter device, a first plate correct size is equal,
When exchanging the filter device, the filter device is configured such that the first plate covers the harmful substances adhering to the filter medium surface and seals the periphery thereof. The other of the two plates is a second plate having a shape and a size that covers the filter material surface of the filter and all of the harmful substance adhering portions in the vicinity thereof,
The filter device according to claim 1, wherein when the filter device is replaced, a peripheral portion of the second plate is attached to the flange and sealed. A method of replacing a filter device installed in the exhaust system hazardous substances handled experiments and harmful substances are used in the experiments that occur,
Preparing a plate for covering harmful substances remaining on the filter and its peripheral part of the filter device; and
After exhausting with the exhaust device, the adhered part of the harmful substance and the contaminated part with the harmful substance are sealed with the plate so that the harmful substance does not leak to the outside. A step of exchanging,
Said plate, filter medium surface and shape of the filter of the filter device, a first plate correct size is equal, the shape that covers all of the filter medium surface and harmful substances adhering portion of its periphery of the filter, the magnitude second Including
In the step of replacing the filter device, the first plate covers the harmful substance adhering to the filter medium surface and seals the periphery thereof, and the peripheral portion of the second plate is attached to the flange of the filter device and sealed. A method for replacing a filter device, wherein the filter device is replaced.

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