JPH1076112A - Fluid purification device - Google Patents

Abstract

(57) Abstract: The present invention provides a fluid purifying apparatus that can be easily disassembled, cleans and reuses a filter unit, and reduces the cost of purifying a fluid. An untreated fluid containing a substance to be removed such as particles flows into an inflow space (13) of a filter unit (1) from an inlet (10) of a lid member (2), and passes through an inner cylindrical filter (6) and an outer cylindrical filter (7). Then, it flows to the outside of the outflow space 14 and the outer cylindrical filter 7, and the substance to be removed such as particles is filtered. When the use limit of the filter is reached, the connecting means 4
Then, the lid member 2 and the lid member 3 are separated from the filter unit 1. The filter unit 1 includes inner and outer cylindrical filters 6 and 7 by end plates 8 and 9 which are connecting members.
Are combined to maintain their shape. When the filtered material is removed by an appropriate means through the opening 15, the filter unit 1 is regenerated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid purifying apparatus for purifying a liquid or gaseous fluid by removing substances such as particles contained in the fluid by a filter.

[0002]

2. Description of the Related Art Filters are usually made of filter paper, fiber,
The filter is made of woven or nonwoven fabric, but is often made of inexpensive filter paper if the filter is considered to be a consumable item. Regarding the filtration area as one of the indices indicating the filtration ability of the filter, the larger the filtration area, the longer the time until the clogging occurs, and the less the number of filter replacements. For example, in a machining fluid purifying device of an electric discharge machine, in order to secure a filtering area as much as possible in a limited space in the purifying device, the filter is purified as a cylindrical filter formed in a continuous fold. It is stored in the case of the device. When a filter made of filter paper contains water, it becomes soft and has a reduced pressure resistance. As the sludge is caught by the filter, the pressure on the supply side increases, so that by detecting this pressure, it is possible to know when to replace the filter before the withstand pressure is reached.

[0003] The machining fluid purifying device of an electric discharge machine is roughly classified into an external filtration type purifying system by filtering a machining fluid containing sludge and supplied by pressurizing, on the inside or outside of a cylindrical filter. A distinction is made between devices and internal filtration purifiers.

[0004] The outer filtration type purifying device is used to pass a pressurized working fluid from the outside to the inside of a cylindrical filter.
The sludge is filtered outside the cylindrical filter.
Since the sludge is adhered to the outside, it is possible to maintain the filtration ability while being relatively small even if the filtration proceeds. Also,
Since the sludge adhering to the outside is easily removed from the filter, there is an advantage that the filter can be easily cleaned, so that the filter can be easily replaced and reused. However, in order to send the pressurized working fluid from the outside of the cylindrical filter, it is necessary to cover the outside of the filter with a sealed container having a larger size and pressure resistance than the filter. Further, when cleaning or replacing the filter, it is necessary to clean the inside of the container, the time for stopping the electric discharge machine for cleaning or replacement is long, and the operation efficiency of the machine is deteriorated. Then, there is an inconvenience that the sludge may fall from the filter and stain the clothes and floor of the worker.

[0005] On the other hand, a machining fluid filtering device of an electric discharge machine using an inner filtration type purifying device is disclosed in, for example, Japanese Utility Model Publication No.
As described in JP-A-2006-2006, when the pressurized working fluid is passed from the inside to the outside of the cylindrical filter, the sludge is filtered inside the cylindrical filter. In order to send the pressurized working fluid from the inside of the cylindrical filter, it is not necessary to cover the outside of the filter with a pressure-resistant container larger than the filter. When replacing the filter, the sludge is less likely to fall off the filter, and therefore does not stain the clothes and floor of the operator. However, the inside filtration type purification device has the following disadvantages. That is, since the sludge is collected inside, the more the filtration proceeds, the lower the filtration ability. In order to increase the filtration capacity beyond a certain level, the entire filter must be enlarged.
When the sludge accumulates, the entire apparatus becomes heavy, and the workability of replacing the filter deteriorates. Since the supplied working fluid exerts pressure on the filter outward, it is necessary to manufacture the filter to have pressure resistance. The filter is difficult to clean because the sludge deposited on the inside of the filter is difficult to remove from the filter, so that the filter is disposable. Therefore, the cost for the filter is high. In addition, when the filter is replaced, it is necessary to prolong the stop time of the electric discharge machine, and the operation efficiency of the machine is poor.

[0006] As another form, there is an inside / outside filtration type purification device in which an annular filter is arranged inside and outside. That is, in recent years, with the advance of the technology of the electric discharge machine, the wire electric discharge machining speed has been improved, and the amount of sludge generated during machining has been increased in proportion thereto, and the sludge generated in large amounts has been collected to purify the machining fluid. In order to improve the filtration capacity of the filter
There has been proposed an internal / external filtration type purifying apparatus in which two large and small filters each having filter paper formed in a fold shape are concentrically arranged. According to this purifying device, the used working fluid to be filtered is supplied to the annular space, and the purified working fluid is taken out inside the inner filter and outside the outer filter.

[0007]

However, originally,
In addition to the fact that the filter itself was considered as a consumable item, in this internal / external filtration type purifier, sludge is collected in the annular space between the inner and outer filters, so when the filter is replaced. It was difficult to remove from the filter. Therefore, the filter is disposed of as a disposable when it reaches the end of its life causing clogging, and is not considered for reuse.

[0008] A filter made of filter paper is an article that can be obtained at relatively low cost. However, if the amount of unused filter increases, it becomes an economical burden, and as a form of a purification device until it is disposed of as waste. There were inconveniences such as occupying one corner of the factory space for storage.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is assumed that a purifying apparatus of an internal / external filtration type having a high filtering ability is collected between an internal and external cylindrical filter. It is an object of the present invention to provide an internal / external filtration type fluid purifying apparatus which employs a structure capable of easily removing adhered substances and makes the filter reusable.

[0010] The present invention has been made in order to solve the above-mentioned object.
It is configured as follows. That is, the present invention provides an inner cylindrical filter, an outer cylindrical filter disposed outside the inner cylindrical filter, and a filter unit including a connecting member that connects the inner cylindrical filter and the outer cylindrical filter. A first lid member that seals one end of the filter unit and has an inlet for inflow of untreated fluid, and an outlet that seals the other end of the filter unit and allows the treated fluid to flow out. A second lid member provided, and a connecting means for detachably connecting the first lid member and the second lid member to the filter unit, and between the inner cylindrical filter and the outer cylindrical filter. Is formed with an inflow space connected to the inflow port, and an outflow space connected to the outflow port is formed inside the inner cylindrical filter. Apparatus on.

According to this fluid purifying device, the untreated fluid containing the substance to be removed, such as particles, flows into the inflow space from the inflow port provided in the first lid member, and passes through the inner cylindrical filter of the filter unit. After passing through the outer cylindrical filter, it flows to the outside of the outer cylindrical filter and to the outflow space. Since the filter unit is closed except for the inflow port and the outflow port with respect to the first lid member and the second lid member, the fluid does not flow out without being treated. As the untreated fluid passes through the filter, materials to be removed, such as particles, adhere to the filter and are filtered. When the amount of adhesion to the filter increases and the filter reaches the limit of use, the connection by the connecting means is released and the first lid member and the second lid member are removed from the filter unit for replacement of the filter. Since the inner cylindrical filter and the outer cylindrical filter are connected by the connecting member, the filter unit maintains its shape. Since the appropriate means for removing the deposit from the filter becomes accessible to the inflow space, the filter unit from which the collected deposit has been removed can be reused.

In this fluid purifying apparatus, when the inner cylindrical filter and the outer cylindrical filter are formed by forming a filter material such as filter paper in a pleated shape in the circumferential direction, the filtration area of both filters becomes very large, and the filtering capacity becomes large. Is improved. When the inner cylindrical filter and the outer cylindrical filter are arranged concentrically, the space between the cylindrical filters is equalized in the circumferential direction, and the adhesion of the substance to be filtered is also equalized in the circumferential direction.

Further, in this fluid purifying apparatus, the connecting member for connecting the inner cylindrical filter and the outer cylindrical filter is connected to the first end plate and the first end plate which are connected at one end and the other end of the two cylindrical filters, respectively. Consists of a two-end plate. The first end plate and the second end plate have a plurality of first openings that open to the inflow space and a second opening that opens to the outflow space. Further, the inflow port of the first lid member communicates with one of the first openings formed in the first end plate, and the outflow port of the second lid member is formed in the second end plate formed in the second end plate. Communicate with the opening. With this configuration, the inflow port of the first lid member can communicate with at least one of the plurality of first openings of the first end plate, so that the untreated fluid flows into the inflow space. I do. On the other hand, the outlet of the second lid member can communicate with the second opening of the second end plate, so that the treated fluid flows out of the outlet space. When such a structure of the end plate is adopted, the first side end plate and the second end plate have the same structure, and a common component is achieved as the end plate. If an outlet capable of communicating with the outflow space is provided in the first lid member, the treated fluid in the outflow space can also flow out of the first lid member through the second opening of the first end plate.

In the above-mentioned fluid purifying apparatus, the tubular metal perforated plate is provided along the inside of the inner tubular filter and the outside of the outer tubular filter. When connected to the first end plate and connected to the second end plate on the other end side, the inside of the inner cylindrical filter and the outside of the outer cylindrical filter are cylindrical metal perforated plates through which fluid can flow. And the integrity as a filter unit is strengthened. When the filter unit is configured in this manner, when the inner cylindrical filter and the outer cylindrical filter are configured with a filter medium that cannot be expected to have strength, it is useful to accommodate the filter medium while maintaining the shape of the filter medium, and to connect the filter unit with the filter unit by the connecting means. Thus, the first lid member and the second lid member have a structure that withstands a connecting force when connecting the first lid member and the second lid member. The fluid purified by passing through the inner cylindrical filter and the outer cylindrical filter flows out of the outflow space and the outer cylindrical filter through the cylindrical metal perforated plate.

When the sludge is deposited close to the filtration limit of the filter, the overall weight of the purifying device is greatly increased, and thus the purifying device may be damaged when the filter is replaced or the like. In the fluid purification device, the inner peripheral surface of the cylindrical metal porous plate provided along the inner side of the inner cylindrical filter is supported and reinforced by a ring, and provided along the outer surface of the outer cylindrical filter. When the band is fitted to the outer peripheral surface of the cylindrical metal perforated plate and reinforced, the strength of the purifier is increased, and even when the sludge adheres to the filter almost to the limit, the purifier is not damaged.

In the above-mentioned fluid purifying apparatus, the first lid member and the second lid member may seal the filter unit between the first end plate and the first lid member and the second end plate. Sealing means for sealing around the plurality of first openings between the first cover member and the second lid member. Further, the sealing means can be constituted by an annular inner packing provided inside the plurality of first openings and an annular outer packing provided outside the plurality of first openings.

The connecting means for connecting the first lid member and the second lid member to the filter unit is configured to include a connecting rod penetrating the outflow space. When the connecting means is configured in this manner, the connecting rod is arranged by utilizing the outflow space, and contributes to downsizing of the entire apparatus. When the connecting rod is connected to the second lid member via a presser that abuts from the outside, the space formed between the second lid member and the presser is a passage for the purified fluid from the outlet. A possible passage.

When the processing fluid is a liquid and the fluid purifying device is used in a semi-submerged state in the storage tank for the processed liquid, a vent hole is formed in the first lid member to communicate the outflow space to the outside air. And, the air pressure in the outflow space becomes atmospheric pressure, and there is no difference in the internal and external pressure difference between the inner cylindrical filter and the outer cylindrical filter, and both filters can perform the processing evenly, and the outflow of the processed liquid smoothly. It can be carried out.

When a handle is provided on the first lid member, the fluid purifying device can be easily carried for exchanging a filter or the like. Further, a plurality of the filter units may be used by being stacked in the axial direction. With such a configuration, the filtration capacity of the purifying device can be increased by the number of stacked stages.

When the processing fluid is used as a machining fluid used in an electric discharge machine, the fluid purifying apparatus is used to collect sludge generated by electric discharge machining such as wire cutting by a filter unit. It is supplied to the electric discharge machining part of the machine and recycled.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded cross-sectional view of one embodiment of the fluid purification device according to the present invention, FIG. 2 is a top view of a first lid member used in the fluid purification device shown in FIG. 1, and FIG. FIG. 4 is a plan view of an end plate used in the fluid purifying device shown in FIG. 1, FIG. 5 is a bottom view of a presser foot used in the fluid purifying device shown in FIG. 1, and FIG. 6 is a perspective view of an assembled state of the fluid purifying apparatus shown in FIG. 1; FIG. 7 is a partial plan view showing a part of an end plate of the fluid purifying apparatus according to the present invention with a lid member removed, with a part thereof cut away; FIG. 8 is a front view showing an embodiment in which two filter units are stacked in the fluid purifying apparatus according to the present invention.

FIG. 6 is a perspective view showing the overall appearance of the fluid purifying apparatus according to the present invention. As shown in FIG. Cover member 2 as a first cover member applied to the upper end side of the cover member, cover member 3 as a second cover member applied to the lower end side of the filter unit 1, and the cover member 2 and the cover member for the filter unit 1. And connecting means 4 for removably connecting the connecting means 3 to each other. The cover member 2 is provided with a handle 5 whose both ends are rotatably connected to the diametrically opposed position.

FIG. 1 is an exploded sectional view of the fluid purifying apparatus (excluding the handle 5) according to the present invention. The filter unit 1 includes an inner cylindrical filter 6, an inner cylindrical filter 6,
And an end cylindrical plate 7 and a second end plate as a first end plate which are connecting members for connecting the inner cylindrical filter 6 and the outer cylindrical filter 7 to each other. End plate 9. The lid member 2 is provided with an inlet 10 for sealing one end (upper end in the figure) of the filter unit 1 and allowing an untreated fluid to flow into the filter unit 1. The inflow port 10 is a male joint for a pipe extending from a supply source such as a pump (not shown), and this joint is screwed to the lid member 2. When a waterproof material is used for the screw portion, the sealing performance is further improved. The inlet 10 is supplied with a raw fluid under pressure from a supply source. Lid member 3
Is the other end of the filter unit 1 (the lower end in the figure)
And an outlet 11 for allowing the treated fluid to flow out of the filter unit 1. An inflow space 13 connected to the inflow port 10 is formed between the inner cylindrical filter 6 and the outer cylindrical filter 7. An outflow space 14 connected to an outlet 16 is provided inside the inner cylindrical filter 6.
Are formed. The inflow space 13 and the outflow space 14
The cover members 2 and 3 are connected to the filter unit 1
, The ends are defined by the lid members 2 and 3.

In the filter unit 1, as shown in FIG. 7, an inner cylindrical filter 6 and an outer cylindrical filter 7 are provided.
Is formed by forming a filter medium 12 such as filter paper into a fold in the circumferential direction. The inner and outer cylindrical filters configured in this way have a very large filtration area, and the filtration ability is improved. The inner cylindrical filter 6 and the outer cylindrical filter 7 are arranged concentrically, and the inflow space 13 between the cylindrical filters is equalized.

Inner cylindrical filter 6 and outer cylindrical filter 7
A coupling member for coupling the two cylindrical filters 6 and 7 at one end (upper end in the drawing) and the other end (lower end in the drawing) respectively includes an end plate 8 and an end plate. 9 is comprised. As shown in FIG.
The end plate 9 has openings 15 as a plurality of first openings that open to the inflow space 13, and an outflow space 14.
An opening 16 is formed as a second opening that opens to the opening. The openings 15 are preferably formed concentrically and at equal intervals. The opening 16 is preferably formed in a circular shape with its center being the center of the end plate 8 and the end plate 9. By forming the opening 15 and the opening 16, the inner annular region 17 and the outer annular region 1 are formed.
8 are connected by a rib portion 19 extending in the radial direction. Inner annular region 17 and outer annular region 1
Numerals 8 are regions where the edges of the pleated filter medium 12 of the inner cylindrical filter 6 and the outer cylindrical filter 7 abut, respectively. The opening edge 20 of the opening 15 is bent toward the filter, and is engaged with the ends of the inner cylindrical filter 6 and the outer cylindrical filter 7. Opening edge 21 of opening 16
The outer peripheral region 22 of the outer annular region 18 is bent toward the filter, and is engaged with a metal porous plate described later. Further, since the inlet 10 of the lid member 2 is aligned with one of the openings 15 formed in the end plate 8, the machining fluid of the electric discharge machine, which is an untreated fluid, flows from the inlet 10. It flows into the inflow space 13. The other opening 15 formed in the end plate 8 is sealed with the lid member 2 by a sealing means described later. Further, the lid member 3
Outlet 11 communicates with the opening 16 formed in the end plate 9, so that the filtered working fluid, which is a processed fluid, flows out of the outlet space 14 through the opening 16 through the opening 16. Spill out of. The opening 15 formed in the end plate 9 is also hermetically sealed by the lid member 3 and a sealing means described later. When such a structure of the end plate is adopted, the end plate 8 and the end plate 9 have the same structure, and parts can be shared as the end plate, thereby contributing to a reduction in manufacturing cost. it can. If the cover member 2 is provided with an outlet (not shown) that can communicate with the outflow space 14, the processed working fluid in the outflow space 14 allows the end plate 8 to be processed.
Through the opening 16 of the cover member 2.

A tubular metal porous plate 23 is provided along the inside of the inner tubular filter 6. Also, a cylindrical metal porous plate 24 is provided along the outside of the outer cylindrical filter 7. The cylindrical metal perforated plates 23 and 24 are engaged with the opening edge 21 and the outer edge 22 of the end plates 8 and 9 at both ends. The cylindrical metal perforated plates 23 and 24 are connected to the end plate 8 and the end plate 9.
At the same time, the filter medium 12 is protected by surrounding the inner cylindrical filter 6 and the outer cylindrical filter 7, and forms a framework when handled as the filter unit 1. When the strength of the filter medium 12 cannot be expected,
The connecting member 4 has a structure that withstands a connecting force when the lid member 2 and the lid member 3 are pulled toward and connected to the filter unit 1. The fluid purified by passing through the inner cylindrical filter 6 and the outer cylindrical filter 7 flows out of the outflow space 14 and the outside of the outer cylindrical filter 7 through the cylindrical metal porous plates 23 and 24.

If the substance to be filtered by the filter unit 1 is sludge having a high specific gravity, such as metal powder, the filter unit 1 to which the sludge has adhered to near the limit of the filter becomes very heavy. When the is moved, the frame of the filter unit 1 may be damaged. In this fluid purifying apparatus, the cylindrical metal porous plate 2 provided along the inside of the inner cylindrical filter 6 is provided.
3 is supported by a ring 25 and reinforced, and a band 26 is fitted on the outer peripheral surface of a cylindrical metal porous plate 24 provided along the outside of the outer cylindrical filter 7 to reinforce the filter unit 1. The strength of the filter is increased so that it does not break even when the sludge adheres to the filter almost to the limit.

The means for sealing the filter unit 1, especially the inflow space 13, between the lid member 2 and the end plate 8, and the lid member 3, Between the end plate 9 and the end plate 9 by a sealing means for sealing around the plurality of openings 15. In order to seal around the openings 15, sealing means such as an O-ring may be applied to each of the openings 15;
As shown in FIG. 5, an annular inner packing 27 provided inside the plurality of openings in common, and an annular outer packing 28 provided outside in common to the plurality of openings.
And can be composed of The inner packing 27 and the outer packing 28 are fitted in inner circumferential grooves 29 and outer circumferential grooves 30 formed on the surfaces of the lid members 2 and 3 facing the end plates 8 and 9. Before the tightening, a part of the inner packing 27 and the outer packing 28
And the size protruding from the outer peripheral groove 30.
The dimensions of the flanges 31 formed on the peripheral portions of the lid member 2 and the lid member 3 are set so as to fit to the outer edges 22 of the end plates 8 and 9, respectively. . Considering that both end plates are formed by press forming a metal plate, the inner diameter of the flange 31 is
The outer edge 22 is designed to be larger than the outer diameter.

Next, the connecting means 4 for connecting the lid member 2 and the lid member 3 to the filter unit 1 will be described. The main component of the connecting means 4 is a connecting rod 32 penetrating the outflow space 14. With this configuration,
The entire device can be made compact. Male screws 33 and 34 are formed at both ends of the connecting rod 32, respectively.
A fastening nut 37 is screwed through a washer 36 into a male screw 33 penetrating a through hole 35 formed at the center of the lid member 2. The other male screw 34 is connected to the outlet 1 of the lid member 3.
1 and a female screw 3 formed in the center of the presser foot 38
Screw into 9. Male screw 34 screwed into female screw 39
Is provided with a lock nut 42 through a locking washer 41.
To fix the presser foot 38. As shown in FIGS. 1 and 5, a foot portion 40 that contacts the lid member 3 is formed at both ends of the presser foot 38. When the tightening nut 37 is screwed into the male screw 33, the cover member 2 is pressed toward the end plate 8, and the inner packing 27 and the outer packing 28 provided for the cover member 2 are pressed against the end plate 8. It seals around the opening 15 on the inflow port 10 side. The lid member 3 is pressed toward the end plate 9, and the inner packing 27 and the outer packing 28 provided for the lid member 3 are pressed against the end plate 9, and the opening 15 is formed on the outlet 11 side. Seal around. An outflow space 1 is provided between the lid member 3 and the presser foot 38.
It becomes easy to form the passage 44 (see FIG. 6) through which the purified fluid from 4 can pass. Note that the connecting rod 32, the tightening nut 37, the lock nut 42, and the like penetrating the outflow space 14 are merely examples when embodying the connecting means 4.
May be configured as a connection yoke (not shown) extending around the outside of the device. Further, the flat portion 43 formed on a part of the connecting rod 32 engages a wrench for releasing the screw connection when the male screw 34 of the connecting rod 32 is too tightly connected with the female screw 39 of the presser foot 38. It is a spanner engaging portion.

When the processing fluid is a liquid and this fluid purifying apparatus is used in a semi-submerged state in a storage tank for the processed liquid, a vent 45 is formed in the lid member 2 to communicate the outflow space 14 to the outside air. And the air pressure in the outflow space 14 becomes the atmospheric pressure, and there is no difference between the inside and outside pressure differences between the inner cylindrical filter 6 and the outer cylindrical filter 7, and both the filters 6 and 7 can be processed uniformly, and the processing has been completed. The outflow of the liquid can be performed smoothly.

When the handle 5 is provided on the cover member 2, the fluid purifying device can be easily carried for exchanging a filter or the like. The handle 5 can be rotatably attached to both ends in the diameter direction of the lid member 2. Further, as shown in FIG. 8, the fluid purification device according to the present invention can use a plurality of filter units 1 stacked in the axial direction. For the upper and lower lid members, etc., the filter unit 1
Is the same as the case where one is used, and a detailed description is omitted. With such a configuration, the filtration capacity of the purifying device can be increased by the number of stacked stages.

When this fluid purifying device is used as a purifying device for a machining fluid of an electric discharge machine, an untreated machining fluid containing sludge of metal powder generated by electric discharge machining is pressurized by a pressurizing means such as a pump (not shown). Inlet 10 of cover member 2
Flows into the inflow space 13 of the filter unit 1. On the other hand, the working fluid flowing into the inflow space 13 flows to the outflow space 14 through the inner cylindrical filter 6 and the inner cylindrical perforated plate 23. At this time, the sludge contained in the working liquid adheres to the inner cylindrical filter 6. The working fluid that has flowed into the inflow space 13, on the other hand, passes through the outer cylindrical filter 7 and flows to the outside of the outer metal porous plate 24. At this time, the sludge contained in the working liquid adheres to the outer cylindrical filter 7. The purified working fluid is again supplied to the electric discharge machine and recycled. The amount of the sludge 46 attached increases, and the sludge fills the inflow space 13 (see FIG. 7). As a result, the internal pressure of the inflow space 13 increases.
Using this pressure, the life of the filter can be known using a pressure gauge with a contact or the like. When the use limit of the filter is reached, the connection by the connection means 4 is released to replace the filter.
That is, the fastening nut 37 is connected to the external thread 3 of the connecting rod 32.
4 and the lid member 2 is separated from the filter unit 1. The lid member 3 and the connecting rod 32 are integrally removed from the outflow space 14, and the lid member 3 is separated from the filter unit 1. In the filter unit 1, the inner cylindrical filter 6 and the outer cylindrical filter 7 are connected by the end plate 8 and the end plate 9, which are connecting members, so that the shape is maintained. The sludge 46 accumulated in the inflow space 13 between the inner and outer cylindrical filters 6 and 7 is swept out or flushed out of the filter unit 1 by an appropriate means such as a long rod or a fountain nozzle attached to the end of a hose. And the filter unit 1 can be regenerated.

The fluid purifying apparatus according to the present invention has been described as an example in which the processing fluid is a purifying apparatus for a machining fluid used in an electric discharge machine.
It can be used as a purification device for a liquid, a gas or a mixed fluid containing a substance to be filtered by a filter.

[0034]

Since the present invention is configured as described above, it has the following effects. That is, the fluid purification device according to the present invention includes an inner cylindrical filter, an outer cylindrical filter disposed outside the inner cylindrical filter, and a connecting member that connects the inner cylindrical filter and the outer cylindrical filter. A first lid member having an inlet for sealing one end of the filter unit and allowing an unprocessed fluid to flow in, and for sealing the other end of the filter unit and allowing the processed fluid to flow out A second lid member provided with an outlet, and connecting means for detachably connecting the first lid member and the second lid member to the filter unit, wherein the inner cylindrical filter and the outer cylindrical member An inflow space connected to the inflow port is formed between the filter and the filter, and an outflow space connected to the outflow port is formed inside the inner cylindrical filter. Because it is untreated fluid containing the substance to be removed such as particles is flowed into the inflow space from the inlet of the first cover member, through the inner cylindrical filter and the outer cylindrical filter,
It flows to the outside of the outer cylindrical filter and to the outflow space of the inner cylindrical filter. Substances to be removed such as particles adhere to the filter and are filtered. When the amount of adhered substance increases and the filter reaches the limit of use, the connection by the connecting means is released and the first lid member and the second lid member are removed from the filter unit.
In the filter unit, since the inner cylindrical filter and the outer cylindrical filter are connected by the connecting member, the shape can be maintained even after the connection is released. Appropriate means such as tools and hoses can access the inflow space,
When the adhered matter collected by such means is removed, the filter unit is regenerated. As described above, according to the fluid purification device of the present invention, the disassembly of the device is simple, and the inside of the filter unit is easily cleaned while keeping the shape of the filter unit. Therefore, the filter can be reused without being disposable. In addition, the cost of purifying the fluid can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of one embodiment of a fluid purification device according to the present invention.

FIG. 2 is a top view of a first lid member used in the fluid purification device shown in FIG.

FIG. 3 is a bottom view of a second lid member used in the fluid purification device shown in FIG.

FIG. 4 is a plan view of an end plate used in the fluid purifying apparatus shown in FIG. 1;

FIG. 5 is a bottom view of a presser used in the fluid purifying apparatus shown in FIG. 1;

FIG. 6 is a perspective view of the fluid purification device shown in FIG. 1 in an assembled state.

FIG. 7 is a partial plan view showing a part of an end plate in a state where a lid member is removed in the fluid purifying apparatus according to the present invention;

FIG. 8 is a front view showing an embodiment in which filter units are stacked in two stages in the fluid purifying apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter unit 2 Lid member (1st lid member) 3 Lid member (2nd lid member) 4 Connecting means 5 Handle 6 Inner cylindrical filter 7 Outer cylindrical filter 8 End plate (first end plate) 9 End Plate (second end plate) 10 Inflow 11 Outflow 12 Filter media 13 Inflow space 14 Outflow space 15 Opening (first opening) 16 Opening (second opening) 23 Metallic perforated plate 24 Metallic perforated plate Reference Signs List 25 ring 26 band 27 inner packing 28 outer packing 32 connecting rod 38 presser foot 44 passage 45 vent hole 46 sludge

Claims (15)

[Claims] A filter unit comprising: an inner cylindrical filter; an outer cylindrical filter disposed outside the inner cylindrical filter; and a connecting member for connecting the inner cylindrical filter and the outer cylindrical filter. A first lid member that seals one end of the filter unit and has an inlet for inflow of an untreated fluid, and has an outlet that seals the other end of the filter unit and allows the treated fluid to flow out. A second lid member, and connecting means for detachably connecting the first lid member and the second lid member to the filter unit, between the inner cylindrical filter and the outer cylindrical filter. Is a fluid purification device in which an inflow space connected to the inflow port is formed, and an outflow space connected to the outflow port is formed inside the inner cylindrical filter. . 2. The fluid purifying apparatus according to claim 1, wherein the inner cylindrical filter and the outer cylindrical filter are formed by forming a filter material in a fold shape in a circumferential direction. 3. The fluid purifying apparatus according to claim 1, wherein the inner cylindrical filter and the outer cylindrical filter are arranged concentrically. 4. The coupling member includes a first end plate and a second end plate for coupling the inner cylindrical filter and the outer cylindrical filter at one end and the other end, respectively, and includes the first end plate and the second end plate. The end plate and the second end plate have a plurality of first openings that open to the inflow space and a second opening that opens to the outflow space, and the first lid The inlet of the member is in communication with one of the first openings formed in the first end plate, and the outlet of the second lid member is formed in the second end plate. The fluid purification device according to claim 1, wherein the fluid purification device communicates with the two openings. 5. A cylindrical metal perforated plate is provided along the inside of the inner cylindrical filter and outside of the outer cylindrical filter, and one end and the other end of the cylindrical metal perforated plate. The fluid purifying apparatus according to claim 4, wherein the portion is connected to the first end plate and the second end plate. 6. The fluid purifying apparatus according to claim 5, wherein the cylindrical metal porous plate provided along the inside of the inner cylindrical filter is reinforced by a ring fitted on an inner peripheral surface. 7. The fluid purifying apparatus according to claim 5, wherein the cylindrical metal perforated plate provided along the outer surface of the outer cylindrical filter is reinforced by a band fitted on an outer peripheral surface. 8. A seal for sealing around the plurality of first openings between the first end plate and the first lid member and between the second end plate and the second lid member. The fluid purifying apparatus according to claim 4, further comprising means. 9. The sealing means comprises an annular inner packing provided inside the plurality of first openings and an annular outer packing provided outside the plurality of first openings. A fluid purifying apparatus according to claim 1. 10. The fluid purifying apparatus according to claim 1, wherein the connecting means includes a connecting rod penetrating the outflow space and connected to the first lid member and the second lid member. 11. The connecting rod is connected to the second lid member via a presser abutting from outside.
The fluid purification device according to claim 10, wherein a passage through which the purified fluid from the outflow port can pass is formed between the second lid member and the presser foot. 12. The fluid purifying apparatus for an electric discharge machine according to claim 1, wherein the first lid member has a ventilation hole communicating the outflow space with the outside air. 13. The fluid purifying apparatus according to claim 1, wherein a handle is provided on the first lid member. 14. The fluid purifying apparatus according to claim 1, wherein a plurality of the filter units are stacked in the axial direction. 15. The fluid purifying apparatus according to claim 1, wherein the fluid is a machining fluid used in an electric discharge machine, and sludge generated by electric discharge machining is collected by the filter unit.