JP3875623B2 - Filter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter device capable of exchanging filter elements, and more particularly to a filter device including a housing and a connector mechanism for coupling the filter element to a fixed head portion for connection to a piping system. The head portion has at least an inlet and an outlet for the fluid to be filtered, and may be provided with a gas vent for venting gas inside the filter device.
[0002]
[Prior art]
Filter devices used for refining or separating fluids such as liquid and gas include a disposable type in which an internal filter element cannot be exchanged and an exchange type in which an internal filter element can be exchanged. Since a disposable filter device uses a large amount of synthetic resin for a housing (filter part) containing a filter element and a lid part (head part) having a fluid inlet / outlet, the disposable filter device is uneconomical and wasteful of resources.
On the other hand, as described in Japanese Patent Laid-Open No. 10-110657, Japanese Patent Laid-Open No. 8-200252, Japanese Patent Laid-Open No. 5-361212, etc., the exchange type filter device has a fixed head portion having manifolds such as a fluid inlet and outlet. Further, the filter element can be exchanged by detachably coupling one end of the housing containing the filter element. Such exchange-type filter devices can be broadly classified as follows: (1) At the joint between the fixed head portion and the housing, a screw is provided on the peripheral rim of the fixed head portion, and the peripheral rim of the housing is an idle ring in which the inner screw is cut. Supporting and rotating this ring so that the screw is connected to the screw of the fixed head part. (2) At the joint of the fixed head part and the housing, it protrudes outward to the peripheral part of the fixed head part and the housing. (3) Projecting outwardly to the periphery of the fixed head portion and the housing at the joint of the fixed head portion and the housing. Rims are provided, and a number of through holes are provided at regular intervals along the rim, and the fixed head portion and the housing are coupled to each other by bolts and nuts using these through holes. There is a thing that was so that.
[0003]
FIG. 11 shows an example of a replaceable liquid filter device having a coupling means of the above type (2), a fixed head portion 40 having an inlet passage 45 and an outlet passage 49 (optionally equipped with gas vents 46 and 47), and a filter. A housing 41 (with a drain 51 in some cases) containing the element 42 therein, and outer rims 49 and 50 formed around the seam of these elements are joined together by a clamp band 43. Reference numeral 44 denotes a seal ring, and 52 denotes a biasing spring for closely attaching the filter element 42 to the head portion. The filter element 42 is publicly known, and includes a filter membrane folded in a pleat shape between an inner and outer porous cylinder made of synthetic resin, and the upper and lower ends of the filter membrane and the porous inner and outer cylinders are hermetically sealed. Is introduced from the inlet 45 of the fixed head portion 10 and flows along the inner wall of the housing 41, then permeates the filter membrane through the outer cylinder and the filtrate passes from the inner passage of the inner cylinder to the outlet passage 48 of the fixed head portion 40. Go out to.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-110657 [Patent Document 2]
JP-A-8-200572 [Patent Document 3]
Japanese Patent Laid-Open No. 5-361212
[Problems to be solved by the invention]
To assemble or replace the conventional filter device of (2) above, first, the filter element 42 is housed in the housing 41, and the housing 41 is held by hand and pushed up against the force of the spring 52 to surround the peripheral portion. The rims 49 and 50 are brought into close contact with each other and covered with a crank band 43, and the clamp band 43 is clamped by pulling both ends of the clamp band 43 to each other with fasteners (for example, male and female screws) provided at both ends of the clamp band 43. In this work, it is necessary to align the housing and the clamp band at a predetermined position of the fixed head part. Therefore, this work is impossible by one person, and a large force is required when the filter element and the housing are heavy or large. If this is not done properly, the housing may fall off during the work, and the work for removing and tightening the clamp requires labor and time.
In the case of (1) above, it is necessary to rotate the threaded ring many times while holding the housing by hand and screw it into the fixed head screw to a predetermined position, or when the weight of the housing and the cartridge is heavy. Is particularly difficult to operate.
Furthermore, even in the case of (3) above, the housing is held by hand and the peripheral rim of the housing is pressed and held so that the screw holes are aligned with the fixed head, and then fitted to the bolt and nut, and the housing is turned. Therefore, it takes a similar amount of labor and time.
On the other hand, when removing the housing, the same operation as described above is required, which takes time and effort.
In addition, the installation location is narrow and the position adjustment is difficult during installation.
Therefore, in the filter device of the type in which the housing can be reused and the filter element can be replaced, it is possible to provide a filter device which does not have the above-mentioned drawbacks and can be easily attached and detached and the filter element 42 can be easily replaced by a simple operation. It is a subject of the invention.
[0006]
[Means for Solving the Problems]
The inventor made the filter element replaceable, and made the housing and the lid part constituting the head part from stainless steel and other corrosion-resistant and / or corrosion-resistant metals and resins so that they are permanently used. The housing is configured so that it can be easily attached to and detached from the head portion by operating the operation lever, and the head portion is attached to the filter element only by operating the operation lever so that the filter element housed in the housing can be easily replaced. We studied the structure of the filter device that can move the housing to a position that does not interfere with the replacement.
As a result, the housing was tilted at the time of replacement so that the filter element could be easily replaced, the head portion was fixed to the support frame, and the housing was tilted. For this purpose, the housing for storing the filter element is moved from the initial inclined position to the vertical position below the head part, and then the housing is pushed up vertically to hermetically connect the upper end of the housing and the filter element to the head part. I tried to do the opposite movement.
Here, the vertical position relation is selected for convenience of explanation, and in the actual use posture, the fixed head portion may be downward and the housing may be upward.
[0007]
That is, the present invention provides a filter device in which a filter element and an upper end portion of a housing for housing the filter element are coupled to a fixed head portion having a supply liquid inlet passage and a filtrate outlet passage. Pivot from the initial tilt position to the vertical position below the head, and then push the housing vertically upward to hermetically connect the upper end of the housing and the filter element to the head, and reverse the movement when replacing the filter element. This is a filter device.
Such movement is caused by a cam slot provided on a cam plate of an operation lever pivotally attached to an upper end portion of the housing and a cam pin fixed to a frame supporting a fixed head portion and fitted in the cam slot. Can be created when operating the lever.
In addition, this movement becomes smooth by further restricting guide pins that support the lower part of the housing by a vertical guide slot formed in a part of the frame.
[0008]
The present invention relates to a replaceable filter element, a housing for housing the filter element, a raw material inlet and a filtrate outlet for hermetically closing the open upper end of the housing and guiding the fluid to be filtered to the filter element And a support frame that supports the housing and the head portion. The head portion is fixed to the frame, and a guide pin is provided at a lower end portion of the housing. The pin is supported in a substantially vertical guide slot provided in the support frame so as to be movable up and down, and the upper portion of the housing is pivotally attached to an operation lever that can swing between a first position and a second position by a pivot shaft. The operation lever has a cam slot into which a cam pin fixed to the frame is fitted, and the cam slot The shape is such that the housing is coupled to the head portion by the cam pin at the first position, and the housing is substantially at the first position as the operating lever is moved from the first position to the second position. The problem of the present invention has been solved by a filter device which is shaped to be pushed down vertically and then tilted to a position where the filter element can be removed.
The shape of the cam slot enabling the above movement is that the pivot shaft is pulled closest to the cam pin when the operation lever is in the first position, and the operation lever moves away from the first position. This is possible when the pivot shaft is configured to be pulled substantially perpendicularly away from the cam pin and then to move away from the cam pin as the operating lever approaches the second position.
However, since accurate movement cannot be achieved by the movement of only the cam slot and the cam pin, the lower limit of the vertical movement of the housing should be limited by the guide pin and the guide slot in order to achieve more stable and accurate movement. Is preferred.
[0009]
[Action]
The filter device having the above coupling mechanism operates as follows when the housing moves from the first position (vertical position in FIG. 1) to the second position (inclined position in FIGS. 9 to 10) ( The movement from the second position to the first position is reversible). First, when the operating lever is pulled, the edge of the cam slot of the operating lever is pushed by the fixed cam pin, so that the pivot shaft fixed to the upper portion of the housing is pushed downward, thereby pushing the housing downward. At this time, the guide pin fixed to the lower end of the housing is guided downward by the guide slot. The liquid inlet / outlet of the housing is sufficiently separated from the lower end of the head portion.
If the control lever is further pulled from this state, the pivot shaft is pushed downward, but the guide pin is stopped by striking the lower end of the guide slot. As can move forward. Since the cam slot has a trajectory gradually moving away from the pivot shaft, when the operation lever is further pushed down, the housing is tilted forward together with the pivot shaft, and the open upper end thereof is located completely away from the head portion. Thus, the used filter element can be removed and replaced with a new one. On the other hand, it is obvious that to connect the new filter element to the normal position, by pushing up the operating lever, the reverse path is followed.
In this way, the space required for exchanging the filter element is reduced, enabling accurate and reliable work, and reducing the labor and time required for exchanging the filter element.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the filter device of the present invention will be described in detail with reference to FIGS. In the following explanation, the structure is shown with the fixed head placed on the top and the housing placed on the bottom. However, the upside down method is advantageous in that the action of gravity can be used to remove the filter element. It should be understood as a mere relative word.
FIG. 1 shows a filter device in which the filter element 30 (see FIGS. 3 and 10) and the housing 2 are liquid-tightly coupled to the fixed head portion 1, and FIGS. 2 to 6 show the housing 2 from the coupling position of the filter element. FIG. 7 to FIG. 9 show the filter device in the order of the order of rotating the filter element to the removal position from the housing, and FIG. 10 shows the filter element. The filter apparatus in the state of taking out 30 is shown. The process of joining the housing to the head after replacing with a new filter element follows these figures in reverse.
[0011]
Here, the filter device is of a type in which the filter element is exchanged, and such a filter element is known. As can be seen from FIGS. 3 and 10, the filter element 30 is bent into a pleated shape disposed on the outer side of an inner support cylinder 32 made of a fluororesin having a large number of apertures 31, a synthetic resin such as PP or PE, and the like. An endless filter membrane 33 such as PTFE, PP, PE, etc., an outer support cylinder 35 made of a synthetic resin having a large number of apertures 34 to support the outside, and the upper and lower ends of the filter membrane 33 are sealed and the inner and outer sides are sealed. The upper and lower end plates 36 and 37 are fused to the upper and lower ends of the support cylinders 35 and 36. In a state where the filter element 30 is housed in the housing 2 made of heat-resistant and / or corrosion-resistant stainless steel or the like, an outer flow path for a liquid (supply liquid) to be filtered between the outer support cylinder 35 and the housing 2 17 is formed, and the interior of the inner support cylinder 32 forms an inner flow path 16 for the filtrate.
[0012]
As can be seen from FIGS. 3 and 10, the upper end of the filter element 30 has an annular supply liquid inlet member 18 that can be liquid-tightly coupled to the fixed head portion 1 of the filter device and connected to the outer flow path 17, and an inner flow path 16. A filtrate outlet member 19 having an extension protrudes from the head portion 1 and a feed liquid inlet hole 23 and a filtrate outlet hole 24 (actually a pipe joint is provided, but not shown in the figure). It is provided and connected to the internal annular supply passage 20 and the outlet passage 21, respectively. When the filter element 30 is in the coupling position, the supply liquid inlet member 18 is liquid-tightly connected to the inlet passage 20 via a seal ring or the like, and the filtrate outlet member 19 is liquid-tightly connected to the outlet passage 21 via a seal ring or the like. The
[0013]
Next, the structure of the present invention will be described. The filter device includes a support frame 3 fixed to an appropriate place such as a wall surface of the installation site, a head portion 1 fixed to the upper portion thereof, a movable housing 2 disposed below the head portion 1, and a lower portion of the housing. Side support plate 8 (which constitutes a part of the support frame 3), and an operation lever 4 that supports the upper portion of the housing 2 and includes a cam plate 5 for moving the plate up and down and tilting. . The upper end of the housing 2 can be attached to and detached from the lower end of the head portion 1 as described above. This point will be described in detail later. A guide pin 9 ′ is fixed to the lower portion of the housing 2, and is fitted into a substantially vertical guide slot 9 formed in the lower portion of the side support plate 8 so as to be slidable in the vertical direction. The upper part of the housing 2 is pivotally attached to the cam plate 5 of the operation lever 4 by the pivot shaft 7, while the cam slot 6 of the cam plate 5 is fixed to the support frame 3 (in this example, the side surface of the head portion 1). The cam pin 6 'is fitted. For this reason, the upper part of the housing 2 is movably supported by the cam pin 6 ′ via the cam plate 5.
[0014]
The operation lever 4 swings around the pivot shaft 7 by moving the handle 11 up and down, and thereby the cam slot 6 having a predetermined shape fitted to the fixed cam pin 6 'causes the pivot shaft 7 (and thus the housing 2). ) A given exercise is given. The shape of the cam slot 6 that enables this movement is such that when the operating lever 4 is in the coupling position (FIG. 1), the pivot shaft 7 is aligned substantially vertically with the cam pin 6 'and is drawn closest to the cam pin. The pivot shaft 7 is pulled substantially perpendicularly away from the cam pin 6 'as the operating lever 4 moves away from it, and then the pivot shaft is moved away from the cam pin as the operating lever approaches toward the second position. Is possible when it is.
[0015]
However, since it is difficult to achieve an accurate movement only with the movement obtained from the cam slot 6 and the cam pin 6 ′, in order to realize a more stable and accurate movement, the lower limit of the vertical movement of the housing 2 is set to the guide pin 9 ′ and the guide. It is preferable to limit by the slot 9. When the housing 2 first moves vertically and downward and the guide pin 9 'stops at the lowest position, the pivot shaft 7 performs a rotational motion with the guide pin 9' as a fulcrum when the operation lever 4 is further pushed down. It will be. In order to make the vertical and rotational movements smooth, the guide pin 9 'is flat and restrains the movement of the housing in the vertical direction at the beginning of lowering. Further, as can be seen from FIG. 4, a relief 10 for the guide pin is formed at the lower end of the guide slot 9 so that the flat guide pin 9 'can be rotated.
[0016]
5 to 9 show the means for positioning and fixing the filter element 30 to the housing 2, this is merely an example and other suitable means may be used.
A lock member 14 is provided at a position facing the upper end of the housing 2 across the diameter. This locking means has arc-shaped grooves, and a lock plate 15 provided at a position opposite to the upper end of the filter element 30 can be inserted into these grooves from the rotational direction and can be stopped at a predetermined rotational position. The filter element 30 further has a finger hooking projection 13 so that the filter element 30 can be rotated between a lock position and a release position.
[0017]
Next, the operation of the filter device of the present invention will be described.
The filter device having the above coupling mechanism is as follows when the housing moves from the coupling position with the head portion (vertical position in FIG. 1) to the filter element replacement position (inclined position in FIGS. 9 to 10). Operates (movement from the exchange position to the binding position is reversible). 1 to 4, first, when the handle 11 of the operating lever 4 is pulled, the edge of the cam slot 6 provided on the cam plate 5 of the operating lever 4 is pushed by the fixed cam pin 6 ', so The pivot shaft 7 fixed to the part is pushed downward, and the housing 2 is pushed downward. At this time, the guide pin 9 ′ fixed to the lower end portion of the housing 2 is guided downward by the guide slot 9. The supply liquid inlet 18 and the filtrate outlet 19 of the housing 2 are sufficiently separated from the lower end of the head part 1 (FIGS. 2 to 4). In this stroke, since the guide pin 9 'is flat, the housing 2 cannot rotate, and the inlet 18 and outlet 19 thereof are aligned with the supply passage 20 and the outlet passage 21 of the head portion 1, respectively. . Thereby, an unreasonable force does not act between these members and the O-shaped seal ring provided between them. When the operation lever 4 is further pulled (pressed down) from this state, the guide pin 9 'hits the lower end of the guide slot 9 and is stopped.
[0018]
When the operating lever 4 is further pulled (pressed down) from the state shown in FIGS. 2 to 4, the pivot shaft 7 tries to move downward, but the guide pin 9 ′ is stopped at the lower end of the guide slot 9. The shaft 7 moves forward about the guide pin 9 'and the housing 2 starts to tilt forward. Since the cam slot 6 has a trajectory gradually moving away from the pivot shaft 7, when the operation lever 4 is lowered, the cam plate 5 is guided by the pin 6 ′, and the pivot shaft 7 and the housing 2 supported thereby continue to tilt forward. Finally, the housing 2 stops at a position where the end wall of the cam slot 6 engages with the pin 6 '(FIGS. 5 to 7). In this state, the upper end portion of the housing 2 is completely detached from the head portion 1, so that the filter element 30 can be taken out. Accordingly, the filter element 30 is rotated counterclockwise by the finger hooking protrusion 13 and the lock plate 15 of the filter element 30 is rotated from the angular position of FIG. 8 to the angular position of FIG. The filter element 30 is then pulled up.
[0019]
In order to couple the housing 2 fitted with the new filter element 30 to the head portion 1, the operating lever 4 is pushed upward. As a result, the housing follows a reverse process to the above and pivots around the guide pin 9 'to become vertical and align with the head portion 1, and then is pulled up vertically to supply liquid inlet member 18 and filtrate outlet member. 19 are respectively liquid-tightly fitted to the supply passage 20 and the outlet passage 21 of the head portion 1 through an O-shaped seal ring.
[0020]
【The invention's effect】
As described above, according to the present invention, non-uniform stress is not applied when the head portion, the housing, and the filter element are coupled, and local deterioration of the seal ring is prevented in repeated coupling, thereby ensuring the seal. In addition, the seal ring can be easily replaced.
Further, since the housing is a reusable filter device in which the filter element can be replaced, resources can be saved.
In the filter device of the present invention, the housing for storing the filter element is pivoted from the initial inclined position to the vertical position below the head portion only by the operation of the operation lever, and then the housing is pushed upward vertically so that the upper end of the housing and the filter element Is hermetically coupled to the head portion, and when the filter element needs to be replaced, the reverse movement is performed, so that not only the operability is good but also the coupling is stable.
In addition, according to the present invention, the space required for replacing the filter element is reduced, an accurate and reliable work is possible, and the labor and time required for the filter element replacing work can be shortened.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of a filter device according to the present invention in a state where a housing and a head portion are coupled to each other.
2 is a perspective view of the filter device in a state in which a filter element and a housing are vertically pushed down from the coupling position of FIG. 1;
FIG. 3 is a front view of the filter device in the same state as in FIG. 2;
4 is a side view of the filter device in the same state as FIG. 2. FIG.
5 is a perspective view of the filter device in a state where the housing is tilted forward from the state of FIG.
6 is a front view of the filter device in the same state as FIG. 5. FIG.
7 is a plan view of the filter device in the same state as FIG. 5. FIG.
FIG. 8 is a perspective view of the filter device showing a process of unlocking the filter element from the state of FIG. 5;
9 is a perspective view of the filter device in a state where the filter element is further rotated from the state of FIG. 8 and the lock is completely removed. FIG.
FIG. 10 is a perspective view of the filter device in a state where a filter element is exchanged.
FIG. 11 is a perspective view showing an example of a conventional exchangeable filter device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head part 2 Housing 3 Support frame 4 Operation lever 5 Cam plate 6 Cam slot 6 'Cam pin 7 Pivoting shaft 8 Side support plate 9 Guide slot 9' Guide pin 10 Escape 11 Hand hook 13 Finger hook 14 Lock member 15 Lock board 16 Inside Flow path 17 Outer flow path 18 Supply liquid inlet member 19 Filtrate outlet member 20 Annular supply passage 21 Outlet passage 23 Supply liquid inlet hole 24 Filtrate outlet hole 30 Filter element 31 Multiple openings 32 Inner support cylinder 33 Filter membrane 34 Multiple openings Hole 35 Outer support cylinder 36, 37 End plate

Claims (7)

A filter device in which a filter element and an upper end portion of a housing for housing the filter element are coupled to a fixed head portion having a supply liquid inlet passage and a filtrate outlet passage, wherein the housing is moved from an inclined position below the head portion. It is pivoted to a vertical position, and then the housing is pushed upward vertically to hermetically connect the upper end of the housing and the filter element to the head portion, and when the filter element is replaced, the opposite movement is performed. In the filter device, the movement includes a cam slot provided on a cam plate of an operation lever pivotally attached to an upper end portion of the housing, and a cam pin fixed to the frame supporting the fixed head portion and fitted in the cam slot. A filter device , which is a motion created when the operation lever is operated. 2. The filter device according to claim 1 , wherein the movement is regulated by a vertical guide slot formed in a part of the frame with a guide pin supporting a lower portion of the housing.   A replaceable filter element, a housing for housing the filter element, a supply liquid inlet and a filtrate outlet for hermetically closing the open upper end of the housing and guiding the fluid to be filtered to the filter element In the filter device having a head portion, the housing, and a support frame that supports the head portion, the head portion is fixed to the frame, a guide pin is provided at a lower end portion of the housing, and the guide pin is The upper part of the housing is pivotally attached to a cam plate of an operation lever which can be moved between a first position and a second position by a pivot shaft. The cam plate of the operating lever has a cam slot into which a cam pin fixed to the frame is fitted, The slot has a shape in which the housing is coupled to the head portion by the cam pin in the first position, and the housing moves from the first position to the housing as the operating lever is moved from the first position to the second position. The filter device is shaped so that the housing is tilted down to a position where the filter element can be removed. The shape of the cam slot pulls the pivot shaft closest to the cam pin when the operation lever is in the first position, and moves the pivot shaft toward the cam pin as the operation lever moves away from the first position. The filter device according to claim 3 , wherein the filter device is configured to be pulled substantially vertically away from the camshaft and then move the pivot shaft away from the cam pin as the operating lever approaches toward the second position. The filter device according to claim 3 or 4 , wherein the vertical movement of the housing is limited by the guide pin and the guide slot. 6. The filter device of claim 5 , wherein the guide pin has a flat shape, thereby holding the housing vertically during vertical movement. 7. The filter device according to claim 6 , wherein a lower end portion of the front guide slot has a clearance allowing the guide pin to pivot.

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