JP2831649B2 - Filter cartridge assembly in filter device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a filter cartridge assembly for use in a filter device as disclosed in German Offenlegungsschrift 35 20 139 for filtering media in liquids. About.

The filter device disclosed in the above-mentioned German publication 35 20 139 is capable of filtering the medium indicated on page 5, paragraph 1 of the same publication, with a normal pressure of 5 to 16 ba.
r, especially 6-10 bar.

[Conventional technology]

According to the device shown in FIG. 6 in the above-mentioned German publication 35 20 139, an adapter having a nozzle projecting downward is provided. A filter cartridge can be connected to this adapter. The adapter has one hole for feeding. A discharge space is provided in the central area. In addition to the above, a head having a supply nozzle and a discharge nozzle is separately provided.

[Problems to be solved by the invention]

 The above structure has the following problems.

B) When the filter is worn out and the clamp plate and the head are removed, especially the filtrate may spread to the upper surface of the adapter, but it is difficult to wipe off even many (dangerous) substances. there were.

B) Adapters also had to be cleaned before being used for another purpose.

C) between the peripheral area of the adapter and the peripheral area of the head,
An extremely large force is required when trying to provide airtightness that is equivalent to gastightness for gas. If the adapter and head are made of synthetic resin and the pressure used to create the hermetic conditions is too high, the material will flow as is generally known, and will lose hermeticity entirely in the marginal region.

D) If surfaces are to be hermetically sealed without the use of additional packing using the latest technology, the surfaces that contact each other must be extremely flat. However, the diameter of such devices is, for example, of the order of 10 to 30 cm, in which case a flat surface that is gas-tight and / or liquid-tight in an inexpensive manner is formed by injection molding or other methods. It is extremely difficult to produce by the method.

E) Even if an extremely rigid material is used for both the adapter and the head, the area between the discharge space on the one hand and the supply hole and the supply nozzle on the other hand must also be airtight, in which case However, the sealing pressure cannot be applied between the clamping plate and the container. Such conditions are extremely difficult to satisfy. A slight overpressure in the discharge space can also result in very high pressures. This is because overpressure acts on a relatively large area. Thus, for example, when the adapter flexes somewhat downwards, a gap may form, thus causing a short circuit between the supply nozzle and the discharge nozzle. This gap no longer returns to zero when particles are present in the liquid.

In addition, overpressure may also occur in the discharge space, for example, when the check valve closes rapidly or otherwise.

In this case, it is certain that the pressure between the clamping ring and the clamping plate in the outer region is sufficient to maintain the airtightness. However, it cannot be confirmed whether or not a short circuit has occurred inside.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter cartridge assembly in a filter device which avoids the problems described in (a) to (e).

[Means for solving the problem]

In order to achieve the above object, the filter cartridge assembly in the filter device according to the present invention is formed with a circular adapter, at least one nozzle projecting downward from the adapter and mounting the filter cartridge, and the adapter. A supply hole, a circular head having a lower surface that forms a discharge space communicating with the nozzle between the upper surface of the adapter, and a head protruding upward from the head and separated from the discharge space to communicate with the supply hole. A supply nozzle and a discharge nozzle projecting upward from the head and communicating with the discharge space, wherein: a) in a peripheral region, respective peripheral walls of the adapter and the head are liquid-tight and mechanically The inner wall of the adapter and the head surrounding the supply nozzle and the inner wall of the head are The adapter and the head are integrated with each other by being liquid-tightly and mechanically rigidly attached to each other, and b) a first projection integrally formed on the lower surface of the head toward the discharge space. And a second connector integrally projecting from the upper surface of the adapter toward the discharge space are integrally attached to each other. Are prevented from expanding in directions away from each other.

(Operation)

In the filter cartridge assembly in the filter device configured as described above, since the head and the adapter are integrated and they are liquid-tightly coupled in the peripheral region, the filtrate contaminates the adapter surface by removing the head. Nothing. Further, since the head and the adapter are integrated, the head and the adapter can be washed at the same time when used for another purpose. Since the integral head and adapter are liquid-tightly and rigidly connected in the peripheral region, the liquid-tightness in the peripheral region can be ensured without any technique. Further, since the inner wall of the adapter-side supply hole and the inner wall of the head-side supply nozzle are liquid-tightly and rigidly connected to each other, the supply nozzle and the discharge nozzle are completely shut off. Further, the first connector and the second connector
Are connected to each other to define the expansion of the discharge space, so that the head and the adapter are prevented from peeling off. That is, since the discharge space is generally considerably high in pressure due to the liquid to be filtered, if the adapter and the head are merely attached in the peripheral region, as the discharge space expands, the peripheral region has shear strain. Since the force is applied, there is a possibility that the attachment portion may be peeled off, but this is not the case in the present invention.

〔Example〕

Hereinafter, the present invention will be described based on illustrated embodiments.
The figures are to scale.

The filter device is mainly composed of the head 1 as shown in FIGS. 1 and 2 and similar to German publication 35 20 139.
2, adapter 13, filter cartridge 14, tube 1
6, a container 17 and a lid 18 are provided.

The adapter 13 has a geometric central axis 19 perpendicular to a bottom surface 21 having a thickness of about 3 mm. As can be seen from FIGS. 2 and 4, the adapter 13 can be integrally molded by using a split mold without providing a valve.
This is because there is no undercut portion. The bottom surface 21 is circular. On its upper surface 32 are three short,
Ribs 22 are provided at intervals of 120 °. These are about 2 mm high and are each towards the center of similarly spaced nozzles 23, 24, 26. The nozzles 23, 24, 26 are respectively connected to flat container-like portions 27, 28, 29 projecting downward from the bottom surface 21. They have a container 27, 28, 29 with a much larger diameter than the nozzles 23, 24, 26. Containers 27, 28, 29 are, in part, garden surfaces
As well as helping the mechanical reinforcement of 21, it also has the role of another kind of funnel, which has the effect of making the discharge of the medium fluidly advantageous. Further, the container-like portions 27, 28, 29 form a stopper against the upper edge of the cartridge 14 shown in FIG. 1 by means of their shoulders 31 which are perpendicular to the longitudinal sides of the nozzle, It functions more advantageously than when 14 is directly connected to the lower surface of the bottom surface 21.

The upper surface 32 is provided with a plurality of truncated pillars 33 having a cylindrical cross section with a height of about 2 mm. FIG. 4 shows six of them, and they are provided at the position where the bottom surface 21 is most likely to buckle. As can be seen from FIG. 2, the ribs 22 have the same height as these truncated posts 33. At the periphery of the bottom surface 21, a joining peripheral wall 34 that faces vertically upward is formed. The joining peripheral wall 34 has a perfect rectangular cross section up to a height of 2 mm, and at a height above this it transitions upwards to a roof 36 forming a ridge. In this case, the roof 36 is a material for later heat bonding. The joining peripheral wall 34 is uniformly about 3 mm thick.

On the bottom surface 21, a joint inner wall 39 also protrudes upward. As shown in FIG. 4, the joining inner wall 39 is provided around the supply hole 37, and is directly connected to the joining peripheral wall 34 at the bottom surface 21. While the supply hole 37 is provided at the position of 3 o'clock in FIG. 4, the nozzles 23, 24, and 26 are approximately 1,5 respectively.
And at 9 o'clock. That is, the supply holes 37 correspond to the nozzles 24 and 26
Is at a position that bisects the angle between The joining inner wall 39 is separated from the joining peripheral wall 34 in parallel to each other, and is a wall body 41, 4
2 and they are connected by a semicircular arc 43. In this case, the right joining peripheral wall 3 between the wall bodies 41 and 42
The part 4 functions as a part of the joint inner wall 39. The supply hole 37 has a diameter corresponding to approximately half the distance between the joining peripheral wall 34 and the geometrical central axis 19. The area of the supply hole 37 is significantly larger than the area between the individual inner diameters of the nozzles 23, 24, 26. The area of the supply hole 37 at least approximately corresponds to the sum of the areas between the inner diameters of the nozzles 23, 24, and 26. The supply hole 37 has a geometric central axis 38. The joint inner wall 39 is equal to the joint peripheral wall 34 in cross-sectional shape and height.

The head 12 is integrally injection-molded using a thermoplastic synthetic resin. The geometric center axis 44 of the head 12 coincides with the geometric center axis 19 of the adapter 13 in a completed state. The head 12 has a bottom 46 and is about 3 mm thick. The central area of the bottom 46 is reinforced by three ribs 47, each of which protrudes downward. Also, these ribs 47 transition to each other at their proximal ends and are arranged at equal angular intervals to each other, and align the geometric axes 38, 52 to connect the adapter 13 and the head 12 to each other. When joined together, they form a linked body that can be subjected to a tensile load. That is, a load is applied so that the adapter 13 and the head 12 do not separate from each other. As shown in FIG. 2, a discharge nozzle 48 is provided to project upward from the left marginal area of the bottom 46.
Its height is about 60mm. The discharge nozzle 48 penetrates the bottom 46 downward with a circular through-hole 49 downward. The discharge nozzle 48 is located at approximately 8 o'clock as shown in FIG. The supply nozzle 51 is at the 3 o'clock position as shown in FIG. 3 and is also in the outer marginal area of the bottom 46. That is, the supply nozzle 51 is not on the same diameter line as the discharge nozzle 48. The geometric center axis 52 is aligned with the geometric center axis 38 of the supply hole 37 provided in the adapter 13 in a completed state.
The supply nozzle 51 has an extension projecting about 1 cm below the bottom 46. The supply nozzle 51 forms a joining inner wall 53 with an extension at this position. This joint inner wall 53 is virtually identical in its contour to the joint inner wall 39 of the adapter 13, especially in the main areas. Furthermore,
At its lower end, this joining inner wall 53 transitions to a roof part equal to the roof 36 described above. The bottom 46, which is disc-shaped and concentric with the geometric center axis 44,
It has. This joint peripheral wall 54 also protrudes downward similarly to the joint inner wall 53, and the lower end similarly shifts to the roof.
The joint peripheral wall 34 of the adapter 13 and the joint peripheral wall 54 of the head 12 coincide with each other in a completed state.

A pillar 56 projects downward from the bottom of the bottom 46 with a length of about 1 cm. The column 56 is aligned with the truncated column 33 when the geometric long axes 38, 52 are aligned, and together with the truncated column 33 constitutes a coupling body which can be subjected to a tensile load.

As shown in FIG. 2, at a location somewhat deeper than the bottom 46, the joining peripheral wall 54 transitions into an annular, horizontal and short bridge 57. The bridge 57 is liquid-tightly joined to the joining peripheral wall 54, and is itself liquid-tight. Bridge 57 is central axis 44
Coaxial. A reinforcing margin 58 having a thickness of about 3 mm is formed from the outer periphery of the bridge 57 and has a lower end above the roof of the joining peripheral wall 54. Reinforcement margin
The lower end of 58 is thus outside the working area of the heating device for heat welding. A reinforcing rib 59 is provided between the reinforcing margin 58 and the joining peripheral wall 54.
Extend at equal angular intervals. This rib 59 also does not reach the heat welding device.

Bridge 57 transitions integrally and fluid-tightly to an outwardly extending coaxial seal and tightening margin 61. The seal and clamping margin 61 is skewed at an angle of about 60 ° to the horizontal and also has a thickness of about 3 mm, approximately the same as the bottom 46.

To make an integral, welded device:

First, a plate having a temperature higher than the softening point of the thermoplastic synthetic resin is positioned on the plane 62 (see FIG. 2). The adapter 13 is pressed against the plate from below and the head 12 from above and the geometric axes 19, 44 and 38, 52 are aligned with one another. Next, by pulling the plate to the side and immediately pressing the head 12 and the adapter 13 together,
The softened portions in the roof areas of the joint peripheral walls 34, 54 and the joint inner walls 39, 53 fuse liquid-tightly.

It should be noted that the device could be made in three or more parts. Further, a method in which a synthetic resin is injected around one core and the core is melted again later can be used.

Also, it is of course possible to bond the respective parts of the device to each other.

Such a completed device is in its lower region liquid-tightly connected to the upper rim of the tube 16 shown in FIG. In this case, the sealing surface 63 contacts the seal and tightening margin 61 from below. At this time, the discharge nozzle 48 and the supply nozzle 51 extend in a direction crossing the through hole where the lid 18 is appropriately formed. The lid 18 is clamped downward to the container 17.

When the cartridge 14 is depleted (after the corresponding preparatory work), the lid 18 is removed and the device according to the invention can be removed together with the tube 16 and the cartridge 14 and even if the medium is very difficult to handle, the operation can be carried out. Easy.

As shown in FIG. 1, the height of the discharge space 66 can be secured to about 1.2 cm despite the relatively thin structure of about 3 mm, and the discharge space 66 can be designed to be large. According to the first aspect, the adapter surface does not become dirty with the filtrate which is often a dangerous substance, and it is not necessary to wipe the adapter surface. Moreover, when used for another purpose, the adapter can be cleaned together with the head. Also, it is not necessary to use advanced technology to ensure liquid tightness in the peripheral region between the adapter and the head. Furthermore, there is no short circuit between the supply nozzle and the discharge nozzle due to a slight overpressure in the discharge space. Further, even if the head and the adapter are formed relatively thin to save material costs, even if the pressure in the discharge space becomes relatively high, the discharge space is prevented from being widened. No delamination occurs in the peripheral area. According to the features of claim 2, they are relatively light-weight and compact because the force of the clamping device, which must be present, is not applied to the head or the adapter in the area of the discharge space. It can have a thin shape. In particular, in this case the adapter does not have to be a thick plate, so that a lot of material can be saved. In this case, there is no medium at the edges of the seals and the tightening edges, nor is there anything that may be present in the known art.

According to the features of claim 3, a relatively large discharge space can be provided at the bottom of the adapter, which can be made thinner and save material. When the discharge space is large, the pressure is balanced in the discharge space, and in the known technique, it is not necessary to perform the special milling work required for the bottom of the adapter. Further, in this case, the discharge nozzle does not need to be provided at the center position, and can be provided at a position off the center. And, nevertheless, the outflow resistance from the filter cartridge nozzle is the same. However, in this case, no short circuit occurs due to the medium.

According to the features of claim 4, a lightweight but fluidly advantageous device can be obtained.

According to the features of claim 5, there is no sealing problem and this is true even if the rod penetrates the bottom of the head or the adapter.

According to the features of claim 6, the cross-directional coupling is only subjected to a tensile or compressive force and has almost no buckling effect. Also, when these external forces are present, they receive only a significantly smaller force than when they are running diagonally.

According to the features of claim 7, the device can be manufactured in two parts, firstly using the head and the adapter separately. By using a split injection mold, a large screw down distance is not required, and the entire head and the entire adapter, as well as the cross connector, the nozzle, the seal and the tightening margin can be manufactured.

According to the features of claim 8, the cross-direction connectors can also be connected to each other inside the device.

The welding of the two parts to one another can be carried out most effectively by the features of claim 9.

According to the features of claim 10, a space for necessary connection can be secured between the nozzles.

Furthermore, when the nozzle is provided in the peripheral area, it will reinforce that part and it will be easier to handle.

According to the feature of claim 11, the mounting nozzle does not mistake the supply nozzle for the discharge nozzle when the tightening plate is mounted.

[Brief description of the drawings]

1 is a cross-sectional view of a device in a completed state in which a filter cartridge is mounted, FIG. 2 is a cross-sectional view of a cut state before welding, FIG. 3 is a bottom view of a head, and FIG. FIG. 12 Head 13 Adapter 23, 24, 25 Nozzle 37 Supply hole 48 Discharge nozzle 51 Supply nozzle 66 Discharge space 34, 54 Peripheral wall 39, 53 Inner wall

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 27/08 B01D 29/50 B01D 29/11

Claims (11)

(57) [Claims] 1. A circular adapter (13) and at least one nozzle (23) projecting downward from the adapter and receiving a filter cartridge (14),
A circular head (12) having a supply hole (37) formed in the adapter, a lower surface forming a discharge space (66) communicating with the nozzle between the upper surface of the adapter, and a head facing upward from the head. A supply nozzle (51) that is isolated from the ejection and discharge space and communicates with the supply hole; and a discharge nozzle (48) that projects upward from the head and communicates with the discharge space, comprising: In the region, the respective peripheral walls (34, 54) of the adapter and the head are rigidly attached to each other in a fluid-tight and mechanical manner so as to surround the supply hole and the respective adapter and head surrounding the supply nozzle. The adapter and the head are integrated with each other because the inner walls (39, 53) are liquid-tightly and mechanically rigidly attached to each other, and b) the discharge space is integrally formed on the lower surface of the head. The first projecting toward (56) and a second connector (33) integrally projecting from the upper surface of the adapter toward the discharge space are integrally attached to each other, so that the pressure in the discharge space is high. A filter cartridge assembly in the filter device, wherein the head and the adapter are prevented from expanding in a direction away from each other. 2. A filter cartridge assembly according to claim 1, wherein a seal (57, 59) and a clamping edge (61) project radially outward from the peripheral area. . 3. The filter device according to claim 1, wherein the height of the discharge space is many times higher than the thickness of the bottom of the adapter, and the height of the inner wall and the peripheral wall is corresponding. Filter cartridge assembly in the above. 4. The filter cartridge assembly according to claim 3, wherein the height of the discharge space is at least five times the thickness of the bottom of the adapter. 5. The filter cartridge assembly according to claim 1, wherein the first and second coupling bodies are rods made of the same material as the head and the adapter. 6. A filter cartridge coupling according to claim 5, wherein said first and second connecting members are provided perpendicularly to a lower surface of said head and an upper surface of said adapter. body. 7. The mounting surface between the peripheral walls (34, 54) and the mounting surface between the inner walls (39, 53) extend parallel to the upper surface of the adapter and the lower surface of the head. 2. The filter cartridge assembly according to claim 1, wherein the heat welding surfaces are flush with each other. 8. The mounting surface of the first and second coupling bodies,
The filter cartridge assembly according to claim 7, wherein the heat welding surface is a heat welding surface on the same plane as the heat welding surface. 9. The filter cartridge assembly according to claim 8, wherein the head and the adapter are made of a thermoplastic synthetic resin. 10. The filter cartridge assembly according to claim 1, wherein the supply nozzle and the discharge nozzle are provided in a peripheral region inside the peripheral wall. 11. The filter cartridge assembly according to claim 10, wherein the supply nozzle is located on a line deviated from a diameter line on which the discharge nozzle is located.