JPH01254216A - Filter cartridge bonding apparatus, assembly for filter apparatus and filter apparatus - Google Patents

Abstract

PURPOSE: To maintain sealability which is sure for a long period of time by integrally and securely coupling a head and an adapter at their outer peripheral walls and further liquid-tightly coupling the head and the adapter to each other with a collar constituting a sealing device on the outer side thereof. CONSTITUTION: The adapter 11 and the head 12 are integrally connected by an outside wall 18 to constitute one unit, by which a discharge space is formed within the regions of both. A connecting nozzle extends below the adapter 11 where a filter cartridge is mounted. A toric outer peripheral web 21 extends integrally and horizontally from the outside wall 18. A reinforcing ring 22 extends downward from the terminal part on the outer side of this web and the collar 29 extends in an upper outward direction respectively coaxially. Since a holder presses a cap 73 to a filter bottle 63 at the time of completion of assembly, the upper side marginal parts 40, 41 of a foil sack and a spring ring 44 or the like are capable of making a contribution to sealing as these members are made of synthetic resins.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a filter device capable of filtering both non-hazardous and highly hazardous media, and further relates to an assembly for this filter device and to an assembly for this filter device. The present invention relates to a filter cartridge coupling device.

(Prior art) As a filter device of this type, German Publication No. 3520 1
There is something disclosed in 39. It is clear that liquid tightness plays an extremely important role in this type of filter device, but in the above-mentioned German publication 35 20 139, an O-ring is used to ensure liquid tightness. .

(Problem to be solved by the invention) The above-mentioned known methods have the following problems.

[A) The O-ring 34 used is subjected to tensile loads to remain retained in the groove. For this reason, its properties change over time.

(B) The O-ring 34 is further attached to the end portion 2 of the tube 16.
Since the purpose was to hold 9, the accuracy of the fit was lost. This is because the terminal portion 29 is the outer surface 28.
As long as it can be pulled through the O ring 34
Naturally, when it is in the insertion groove, its diameter becomes smaller, and therefore wrinkles occur.

(C) The O-ring 34 is a tube l6 filled with liquid.
When the adapter has to be held during removal from the container 17, it will be subjected to extremely high tensile forces. At this time, the entire weight will be placed on the O-ring 34.

(DJ In this case separate head 78 and adapter 6
2 is required. Although these abut each other through one surface, the outer edge of the lid 84 is held in a liquid-tight manner so that the lid 84 can be attached to the container 69.
Attempts are being made to tighten the system. Since the injection molded product used in this case is not suitable for manufacturing high-end products, the surface is not flat and an extremely large amount of pressure is required to overcome this. However, when a large pressure is applied to a synthetic resin, it exhibits a flow phenomenon over time, and as a result, its liquid-tightness is gradually lost.

(E) When the head 78 is removed, the surface wetted by the liquid is exposed first. This is extremely dangerous when the liquid is a hazardous substance, and requires cleaning even if the liquid is not dangerous.

(The F3 head 78 must also be cleaned before using it with the new adapter 62.

(If pressure is generated in the Gl discharge space, the pressure will bend the adapter 62 downward, the brackets will short-circuit the liquid, and the force will be concentrated on the O-ring, which will prevent the rocking movement of the filter cartridge.) This occurs because the adapter 62 is curved like a ball cup at this time.

(The device for pressing the clamping plate 84 against the old clamping ring 83 against each other must be of particularly robust construction, and this results in excessive dimensions, excessive weight, unsightly appearance and high cost. .

fI) The sealing surface must be very thick, and there are many objects around the periphery of the sealing surface, and this makes the device expensive. is not preferred for disposable devices.

(J) When trying to use two flexible tubes - one for external safety and the other to hold the internal liquid - this is an excessive role for the O-ring 34. becomes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a filter cartridge coupling device, a filter assembly, and a filter device that avoid the problems described above.

(Means for Solving the Problems) In order to achieve the above object, a filter cartridge coupling device according to the present invention includes a circular adapter and at least one circular adapter that protrudes downward from the adapter and to which a filter cartridge can be attached. With the cartridge nozzle: With the circular head above the adapter: With the adapter/
a sealing device in the outer circumferential area of the head; a tightening edge in the outer circumferential area of the adapter/head; a retaining device in the outer circumferential area of the adapter/head for the upper edge of the foil sack; a discharge space formed between the head and the adapter, the edge inside the sealing device between the head and the adapter securely and liquid-tightly connects the head and the adapter. (b) A ring-shaped solid collar with flat upper and lower surfaces extends from the outer peripheral area of the adapter/head in a liquid-tight manner, and (cl) this collar forms part of the sealing device. It is characterized by

Preferably, the collar makes a small angle to the central geometrical axis of the device, even better if it points upwards, and the collar is supported by an integral, liquid-tight ring-like web. , this web can be coupled in a fluid-tight manner with the outer circumferential region of the head/adapter.

with a spring ring that can expand over the collar and also forms a small angle with the geometric central axis;
In the expanded state of this spring ring, it may be ensured that the upper edge area of the foil sac can be tightened between the underside of the collar and the inside of the spring ring, in which case the two foil sacs It is desirable to overlap the spring rings, and also form a short ring-like extension at the terminal end of the collar projecting upwards, approximately vertically, and at the upper terminal area of the spring ring, with another external complementary extension. A ring extension may be provided, the outer ring extension at least partially fittingly overlying the collar-side ring-shaped extension.

On the underside of the filter cartridge coupling device as above,
By suspending at least one filter cartridge in a foil sack, the upper edge area of which is fixed in a liquid-tight manner over the collar, an assembly for a filter device can be obtained, which also comprises: This will achieve the above objectives.

In this case, the edge area of the foil sack can be tightened between the tightening ring and the collar. This edge area may also extend upwardly beyond the tightening area and be welded to the filter cartridge coupling device at that location; furthermore, the upper edge area of the foil sack may not be tightened. In some situations, it is desirable to have a diameter that is smaller than, or at most equal to, the collar.

In addition to an assembly for a filter device as described above, a filter device comprising a filter bottle and a lid, the filter bottle in the upper part, the inside surface of which corresponds to the slope of the outside surface of the collar and/or the spring ring, the minimum diameter of the collar being has a conical slope smaller than the maximum diameter of the slope,
The lid has a complementary conical slope on its outer surface that matches the slope of the collar, and the lid is pressed onto the filter bottle with great force using a tightening device. The purpose is achieved.

In this case, the upper peripheral bulge of the filter bottle has two conical slopes, and by making the angle of the lower conical slope smaller than the angle of the upper conical slope,
It is preferable to have a convex bend between the two conical slopes.

(Function) The filter cartridge coupling device has a peripheral edge that couples the head and the attack, and does not have a sealing element such as an O-ring that is constantly subjected to a particularly large tensile load when the filter bottle is removed. Due to the joined edges, O-rings can also cause wrinkles in the foil sack.

Furthermore, there is no need for a device to tighten the head and adapter, so even if these heads and adapters are made of synthetic resin, there is no deterioration in liquid tightness over time due to tightening. Because the adapter is connected inside the sealing device, even if the head is removed, the liquid-wet surface will not be exposed, and the pressure generated in the discharge space will cause the adapter to bend, allowing the filtered liquid to be removed. The flat collar extending from the outer circumferential area of the adapter/head seals the device without the need for a rigid structure to tighten the sealing device. Since the collar is part of the sealing device, there is no need for the O-ring that constitutes the sealing device and the extremely large sealing surfaces before and after this O-ring.Furthermore, since the collar is part of the sealing device, the edges of the two Foissacks are not required. The area can also be held securely.

The filter device assembly of the present invention comprises coupling at least one filter cartridge to the attack of the filter cartridge assembly and liquid-tightly fixing the upper edge region of the foil sack onto the collar. In a complete assembly, the action of the filter cartridge assembly is utilized.8
Furthermore, the filter device of the present invention operates by tightening the upper edge area of the collar and the foil sack fixed thereto between the outer surface of the lid and the edge bulge of the top of the filter bottle. is used.

(Embodiment) As shown in the figure, an adapter 11 and a head 12 are combined into a unit, and the bracket unit is made of relatively thin synthetic resin. Both of the above form a relatively large evacuation space 13 within their area. Attack 11
A connecting nozzle 14 extends downward from the lower side of the holder, and a filter cartridge can be attached thereto. head 12
a discharge nozzle 16 and a supply nozzle 1 extending upwardly from the
7 is provided. Adapter l1i3 and head 12
are integrally connected to each other by an outer wall 18 at their outer peripheries. This outer wall 18 has a geometric central axis 19
It has the shape of a short cylinder arranged coaxially with the cylinder.

All walls are of the order of 3 millimeters in cross-section and are therefore generally thin compared to the overall diameter of approximately 20 centimeters.

In the lower right region of the supply nozzle 17, the wall is an outer wall 18. An annular outer peripheral web 21 extends integrally and horizontally from the outer wall 18 . The interior of the outer circumferential web 21, which has a thickness of approximately 4 nm as it appears somewhat thicker in FIG. 2, does not have any connection with the discharge space. Rather, the outer circumferential web 21
It is a solid and complete body in all respects.

A coaxially downwardly directed auxiliary ring 22 extends from the outer end portion of the circumferential web 21 . The downwardly open coaxial groove 23 thus created is provided with narrow supplementary bridges 24 extending in the radial direction at regular angular intervals, so that it is completely filled. The wall portion of the outer wall 28 which is at the same height as 23 will be mutually supporting with the supplementary ring 22, which will further increase the rigidity.

The stiffening ring 22 has a circular sliding surface 26 on the lower outside. The outer coaxial cylindrical wall region 27 of this supplementary ring 22 is
The collar 29 reaches approximately half the height of the outer circumferential web 21 and forms a bend 28 at this point to form a collar 29 that extends outward. The collar 29 is coaxial to the geometric central axis 19;
- approximately 3 millimeters thick and extending outwardly and upwardly at an angle of approximately 35°. Precisely, its conical flat outer surface 31 extends upwardly at an angle of 32°, whereas its conical flattened concentric inner surface 32 extends outwardly and upwardly at an angle of 35°. 29 is somewhat weak in that respect (
It's becoming.

The terminal area of the collar 29 merges into a coaxial terminal ring 33 in one piece. This ring 33 extends vertically upwards and, as can be seen in FIG. External surface 3, tilted outward by an angle
6 is followed by a step-like edge 38 approximately 1.25 mm wide that widens coaxially at the top 6. The green 38 extends from the inner surface 3 with a roughly semicircular arc 39.
Connect to 7.

In FIG. 2, the upper marginal region 40, 41 of the two plastic foil sacks, which are folded together, is shown in an exploded state. For safety reasons and to facilitate assembly, the ends 42, 43 of these marginal areas are connected in a locking manner (for example by welding) to the semicircular arc 39 of the end ring 33. The upper side of the edge area 40.41 has a sliding surface 26, so the supplementary ring 21 can be easily attached.
Then, even after they have progressed to at least the outer surface 31, they can be used to cover the wall area 27 over the step 38 in a tight, smooth and planar state. It can be placed along the wall.

The spring ring 44 is integrally injection molded from synthetic resin and has a cross section as shown in FIG.

The spring ring 44 is integrally formed, and has a diameter such that the bulge 46 protruding inward with an arc can touch substantially the lower side of the bent portion 34 without expanding the spring ring 44. In the unfolded state, with a vertical structure and no discontinuities, its lower inner side 47 abuts the edge area 41 of the outer upper part of the foil sack and presses the inner edge area 40 against the wall area 27. In order to prevent punctures caused by sharp corners, the inner surface 47 has a circular arc 48
It is rounded outwards and downwards with the sliding surface 26 to form a secure, tapering (funnel-like) configuration.

In the expanded state, the convex bend 49 fits into the concave bend 28 with the upper edge region 40.41 interposed therebetween. The inner surface 51 facing upward and to the right at an angle of 32° is also the outer surface 3.
1 and tightens the upper edge regions 4o, 41 over a relatively large area at that position.

Corresponding to the bend 34 is a bend 52 followed by an inner surface 53 extending vertically upwards. Corresponding to the step 38 is a complementary corner portion 54 at the same height. The corner portion 54 rests on the step 38 with an intermediate thickness of the foil sack, and this provides additional security in case the spring ring 44 cannot spring back further inward. The connection does not in principle use adhesive, but it is also possible to use adhesive on the inwardly facing surface of the spring ring 44.

The bulge 46 transitions at the top into a radial surface 56;
Beyond the bending point, it transitions to an outer surface 57 that extends vertically downward. Slightly below the inflection point 52 there is an inflection point 58 on the outer surface side, followed by a planar, frustoconical outer surface 59 which runs parallel to the inner surface 51 and is convex. The concave bent portion 61 below the shaped bent portion 49 is reached. From here, an outer surface 62 extends vertically downward and transitions into the arc 48 via a tip. Since the inner surfaces 47.51J5 and 53 of the spring ring 44 are somewhat smaller in size than the wall portion 27, the outer surface 31 and the outer surface 36, all these surfaces are under pressure after the spring ring 44 has expanded. It's so close.

The metal filter bottle 63 has a thickened upper edge 64 which, like the filter bottle 63, is coaxial with the geometric center axis 19 in the assembled state. The filter bottle 63 has a continuous inner surface with no interruption at any position.
The inner surface 66 of 4 forms a cylindrical inner surface, and the bending point 6 is vertically upwardly formed.
7. In the fully assembled state, this bending point 67 is at the level of the concave bend 61 of the spring ring 44. However, the outer surface 62 extends a distance from the inner surface 66. Following the convex inflection point 67 a conical surface 68 is formed, which surface 68 has an angle of 1 with respect to the geometric center axis 19.
It forms an angle of 6°. This angle is smaller than the angle of the outer surface 59 of the spring ring 44. The conical surface 68 reaches a very slightly convex bend 69, and beyond this bend 69 it reaches the geometric central axis 19. 32° to
It then transitions to a conical surface 71 forming an angle of . This longer conical surface 71 reaches approximately half the height of the externally unsupported outer surface 57.6 The conical surface 71 extends to the radial toric surface 72.
to move to.

A peripheral edge 74 corresponding to the peripheral edge 64 of the filter bottle 63 extends downward from the lid 73 in a continuous plane coaxially with the geometric center axis 19 . When the mating edge portion 74 fits into the coaxial annular groove 76 formed by the collar 29 and the outer wall 18, the edge portion 74 does not come into contact with the bottom 75 of the full 76 even when the assembly is completed. Since the non-contact edge 74 does not contact the outer wall 18, it extends outward and upward at an angle of 35'' in the fully assembled state, which is dimensionally smaller than the full 76 in all positions. The outer surface 77 of the inclined edge 74 is connected to the inner surface 32 of the collar 29.
, but not the inner surface 37. This is because the outer surface 77 does not reach a higher position than the inner surface 32.

When the assembly is completed, a holder (not shown) presses the lid 73 onto the filter bottle 63. The outer surface 77 is thus pressed against the inner surface 32.

The outer surface 31 is pressed against the upper edge part 40.41 of the foil sack. The foil sack is also pressed against the inner surface 51. The outer surface 59 is pressed against the bend 69, which exhibits a particularly slight bend, so that the main sealing force is created in this position. Since the portion to be tightened is made of synthetic resin, the material flexes to some extent between the inner surface 51 and the outer surface 59, so naturally the surrounding portion of the bent portion 69 can also contribute to a seal even when the pressure is small. I can do it.

Note that the spring ring 44 may not be a component. When there is a risk that the bend 69 will push through the upper marginal region 40.41, the conical surface 68 and the conical surface 71
It may be necessary to make the angle between the upper marginal region 40.41 so small that, for example, these surfaces transition into each other, above the inflection point 3. A secure bond to collar 29 is extremely important.

The spring ring 44 does not need to change its dimensions, regardless of whether one or two foil sacks are used in this case, since its elasticity compensates for the difference in circumferential length. This is because it is easily absorbed.

A supply nozzle 78 and a discharge nozzle 79 are shown in FIG.

(Effects of the Invention) According to claim 1, there is no sealing element that deteriorates over time due to constant tensile load in the sealing device between the head and the adapter, or deteriorates due to a particularly large load when removing the swallowtail. This method is highly reliable in ensuring liquid tightness, does not cause wrinkles in the edge area of the foil sack, and each edge area is securely held even when two foil sacks are used. The reliability of the liquid tightness at the foil sack connection is also high.

Since only a small portion is required for tightening and sealing, the entire device can be made smaller and lighter, and the cost can be reduced.

According to the feature of claim 2, a wedge effect can be utilized. In other words, the tightening force is as thick as the pressure on the upper and lower sides of the collar (it does not have to be, and the collar applied is
Provides rigidity to the device compared to radial collars.

According to the features of claim 3, an auxiliary groove is provided when the liquid has to be shaken. Furthermore, when the device is first manufactured in advance in two parts and then joined by welding together in a plane passing through the discharge space, the collar does not get in the way; By using the sliding surface, the marginal region can be tightened in such a way that wrinkles do not form there.

According to the feature of claim 4, the rigidity can be further increased and the structure necessary for sealing the lid and the bottle can be moved sufficiently outward, so that the foil sack can make sufficient contact under pressure. A continuous surface can be provided inside.

According to the feature of claim 5, it is possible to maintain a large area of the upper edge region of the foil sack and to keep it free from harmful forces acting on the foil sack. However, in this case the foil sack is thin, for example 5/10 mm.
You must be fascinated by the fact that it is made of foil with a thickness of .

Furthermore, according to claim 5, the sealing force is greater than that of the foil because the foil sack has two easily defined and large-area opposed surfaces by a relatively rigid collar and a relatively rigid spring ring. It has the advantage of being uniformly enlarged without being concentrated in spots on the sack.

According to the feature of claim 6, it is possible to have a safety margin, because even if the liquid-tightness of the inner foil sack is impaired, there is still another foil sack on the outside. be. Furthermore, in this way the outer foil sack can protect the inner foil sack from damage, for example during transport.

According to the features of claim 7, the spring ring has its -
It will no longer bounce back from the fully-contained position.

According to the features of claim 8, the features of the filter cartridge coupling device can be utilized for a complete filter device assembly. That is, claim 8 is directed to a complete assembly for a filter device, whereas claims 1 to 7 are directed only to an adapter/head combination.

The same applies to the features of claim 9.

According to the feature of claim IO, it is possible to further ensure safety not only in terms of liquid-tightness of the foil sack but also in terms of mechanical strength.

According to the feature of claim 11, it is more reliably ensured that the edge portion of the upper foil sack always contacts in a flat state and does not cause wrinkles.

According to the feature of claim 12, the filter device can be used as a filter device having all the advantages of the filter device assembly.

According to the features of claim 3, the liquid-tight conditions can be further improved, since the convex bends pressurize at specific locations.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the filter cartridge coupling device;
The figure is an exploded sectional view showing the main parts of the filter device including the filter device assembly, and FIG. 3 is a partially cutaway side view of the filter bottle and the lid. 11...Head 12...Adapter I3...Ejection space 14...Connection nozzle (cartridge nozzle)
29 ... Collar (sealing device, tightening edge,
Holding bag @)

Claims (13)

[Claims] (1) a circular adapter; at least one cartridge nozzle projecting downwardly from the adapter to which a filter cartridge can be attached; a circular head above the adapter; a sealing device in the outer circumferential area of the adapter/head; a tightening edge in the outer circumferential area of the adapter/head; a retaining device in the outer circumferential area of the adapter/head for the upper edge of the foil sack; and an evacuation space formed between the head and the adapter. (a) an edge inside the sealing device between the head and the adapter securely and liquid-tightly connects the head and the adapter, and (b) an adapter/ (c) A filter characterized in that a ring-shaped solid collar with flat upper and lower surfaces extends from the outer peripheral area of the head in a liquid-tight manner, and (c) this collar forms a part of a sealing device. Cartridge coupling device. 2. The filter cartridge coupling device of claim 1, wherein the collar makes a small angle with respect to the central geometric axis of the device. (3) The filter cartridge coupling device according to claim 2, wherein the collar faces upward. (4) The collar is supported by an integral and liquid-tight ring-shaped web, which web is liquid-tightly connected to the outer peripheral area of the head/adapter. The filter cartridge coupling device according to item or items. (5) having a spring ring which can be spread out over the collar and which likewise makes a small angle with the geometric central axis; Filter cartridge coupling device according to one or more of the preceding claims, characterized in that the upper edge area of the foil sack can be reliably tightened between them. (6) The filter cartridge coupling device according to claim 5, characterized in that the upper edge regions of the two foil sacks can be reliably tightened. (7) The end of the collar transitions into a short ring-shaped extension;
This extension projects upwardly approximately vertically, and the upper terminal area of the spring ring is provided with another complementary outer ring extension, which extends in the form of a ring on the collar side. 6. The filter cartridge coupling device of claim 5, wherein the filter cartridge coupling device overlies the extension in an at least partially fitting manner. (8) A filter cartridge is suspended below the filter cartridge coupling device according to any one or more of the above claims, and the filter cartridge is fixed in a fluid-tight manner in an upper peripheral area above the collar. Assembly for a filter device, characterized in that there is at least one foil sack in the foil sack. 9. Assembly for a filter device according to claim 8, characterized in that the peripheral area of the foil sack between the tightening ring and the collar is tightened. 10. The peripheral region of the foil sack extends upwardly beyond its tightening region and is welded to the filter cartridge coupling device at that location.
An assembly for a filter device as described in . (11) A filter according to one or more of the preceding claims, characterized in that the upper marginal region of the foil sack has a diameter in the untightened state that is smaller than or at most equal to the collar. Assembly for equipment. (12) The filter bottle has a marginal bulge at the top, the inner surface of the marginal bulge has a conical slope corresponding to the slope of the outer surface of the collar and/or the spring ring, and the minimum diameter of the conical slope is smaller than the maximum diameter of the bevel of the collar, while the lid has a complementary conical bevel on its outer surface that matches the bevel of the collar, and the lid is pressed onto the filter bottle with great force using a tightening device;
A filter device with a filter cartridge coupling device or an assembly for a filter device according to one or more of the preceding claims, characterized in that it is tightened. (13) The conical slope of the bulge on the upper edge of the filter bottle consists of two conical slopes, and the angle of the lower conical slope is smaller than the upper conical slope, and the angle is between the two conical slopes. 13. A filter device according to claim 12, characterized in that there is a convex bend.