JPH01254215A - Filter cartridge assembly in filter apparatus - Google Patents

Abstract

PURPOSE: To improve liquid-tightness and to eliminate the short-circuit or the like between a supply nozzle and a discharge nozzle by liquid-tightly, mechanically and rigidly connecting and integrating an adapter and a head at their peripheral edge regions by welding, etc. CONSTITUTION: The head 12 and the adapter 13 are integral and are liquid- tightly coupled at their peripheral edge regions, by which the contamination of the adapter 13 surface with filtrate at the time of removing the head 12 is averted. Since both are integral, the simultaneous washing of the head 12 and the adapter 13 is possible at the time of using both to separate applications. Both which are integral are liquid-tightly and rigidly coupled at their peripheral edge regions, by which the liquid-tightness at the peripheral edge regions is easily assured. Since the inside wall 39 of an adapter side supply hole 37 and the inside wall 53 of a head side supply nozzle 51 are liquid-tightly and rigidly coupled, the supply nozzle 51 and the discharge nozzle 48 are completely shut off.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a filter cartridge combination for use in a filter device as disclosed in DE 35 20 139, used for filtering media in liquids.

The filter device disclosed in the above-mentioned German publication 3520139 is capable of filtering the medium shown in paragraph 1 on page 5 of the publication, and the normal pressure is 5 to 1.
6 bar, especially 6 to 10 bar.

[Conventional technology]

According to the device shown in FIG. 6 of the above-mentioned DE 35 20 139, an adapter is provided with a nozzle projecting downwards. This adapter includes
A filter cartridge can be connected. 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.

[Problem to be solved by the invention]

The above structure had the following problems: 1) When the filter wears out and the clamping plate and head are removed, there is a possibility that the filtrate will spread to the top of the adapter, but many In the case of (dangerous) substances, even wiping them off was difficult.

The adapter 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 amount of force is required when trying to maintain airtightness, which is equivalent to gas tightness. If the adapter and head are made of synthetic resin and the pressure used to create airtight conditions is extremely high, then
The material flows, as is generally known, and the whole loses its tightness in the marginal areas.

2) If modern technology is to provide airtightness to the surfaces without additional backing, the surfaces in contact with each other must be extremely flat. However, the diameter of such devices is, for example, of the order of 10 to 30 mm;
In such cases, it is extremely difficult to produce by injection molding or other methods flat surfaces that are flat enough to permit gas-tightness and/or liquid-tightness in an inexpensive manner.

e) Even if extremely rigid materials are used for both the adapter and the head, the area between the discharge space on the one hand and the supply hole and supply nozzle on the other hand must also be airtight; Therefore, it is impossible to apply sealing pressure 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 extremely high pressures.

This is because overpressure acts on a relatively large area.

Thus, for example, when the adapter flexes somewhat downwards, a gap may occur and thus a short circuit between the supply and discharge nozzles. 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 due to rapid closing of a check valve or in other cases.

It is certain that the pressure between the clamping ring and the clamping plate in the outer circumferential area is sufficient in this case to still maintain the tightness. However, it is not possible to confirm whether a short circuit has occurred internally.

An object of the present invention is to provide a filter cartridge assembly in a filter device that avoids the problems described in (a) to (e) above.

[Means to solve the problem]

In order to achieve the above object, the filter cartridge assembly in the filter device according to the present invention includes a circular adapter, at least one nozzle projecting downward from the adapter and to which a filter cartridge can be connected, and a circular adapter having a shape on the adapter. a circular head above the adapter that communicates with the nozzle; a supply nozzle that projects upwardly from the head and communicates with the supply hole; and a supply nozzle that projects upwardly from the head and communicates with the discharge space. (a) the adapter and the head are integral, and (b) the adapter and the head are coupled in a peripheral area in a liquid-tight and mechanically rigid manner by a peripheral wall. and (c) the adapter surrounding the supply hole and the supply nozzle and the inner wall of the head are fluid-tightly and mechanically rigidly connected to each other.

[For production]

In the filter cartridge assembly in the filter device configured as described above, the head and the adapter are integrated and are liquid-tightly connected in the peripheral area, so that when the head is removed, the filtrate will stain the adapter surface. Never. Furthermore, since the head and adapter are integrated, the head and adapter can be cleaned at the same time when used for another purpose. The head and adapter are integrated,
Due to the liquid-tight and rigid connection in the peripheral area, liquid-tightness in this peripheral area is ensured without the need for any technique. Moreover, 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, so that the supply nozzle and the discharge nozzle are completely isolated.

〔Example〕

The present invention will be described below based on illustrated embodiments. The figures are to scale.

The filter device essentially comprises a head 12, an adapter 13, a filter cartridge 14, a tube 16, a container 17 and a lid 18, as shown in FIGS. 1 and 2 and similar to DE 35 20 139.

The adapter 13 has a geometric central axis 19 perpendicular to the bottom surface 21 with a thickness of about 3 fi. As can be seen in FIGS. It can be injection molded using a split mold. This is because there is no undercut portion. The bottom surface 21 is circular. Its upper surface 32 is provided with three short, 120'' spaced ribs 22.

These are about 2 liters high and each point toward the center of the nozzles 23, 24, 26, which are similarly spaced apart. The nozzles 23, 24, 26 each have a flat container-shaped portion 27, 28° 29 projecting downward from the bottom surface 21.
is connected to. These containers 27, 28, 29 have a considerably larger diameter than the nozzles 23, 24, 26. The container-shaped part 27, 28, 29 has a bottom surface 2.
1, and also has the role of a kind of funnel, which has the effect of making the discharge of the medium fluidly advantageous. Furthermore, the container-shaped parts 27, 28, 29 form a stop for the upper edge of the cartridge 14 shown in FIG. 14 functions more advantageously than when it is directly connected to the lower surface of the bottom surface 21.

The upper surface 32 is provided with a plurality of truncated columns 33 having a cylindrical cross section approximately two fins high. In FIG. 4, the large cylinders among them are shown, and their bottom surfaces 21 are provided at positions where they are most likely to buckle. As you can see from Figure 2, Rip22
A joining peripheral wall 34, which has the same height as these truncated columns 33 and faces vertically upward, is formed at the peripheral edge of the bottom surface 21. This joint peripheral wall 34 has a perfectly rectangular cross-section up to a height of 2 mm, and above this height it transitions upward into a roof 36 forming a ridge. The roof 36 in this case becomes the material for subsequent thermal bonding. The joint peripheral wall 34 is uniformly approximately 3N thick.

A joining inner wall 39 also projects upward on the bottom surface 21 . The joint inner wall 39 is connected to the supply hole 3 as shown in FIG.
7 and directly connected to the joint peripheral wall 34 at the bottom surface 21 . The feed hole 37 is located at the 3 o'clock position in FIG. 4, whereas the nozzle 23.24.2
6 are approximately at the 1.5 and 9 o'clock positions, respectively. That is,
Feed hole 37 is positioned to span the angle between nozzles 24 and 26. The joint inner wall 39 has wall bodies 41 , 42 extending parallel to each other from the joint peripheral wall 34 and are connected by a semicircular arc 43 . In this case, a portion of the right joint peripheral wall 34 between the walls 41 and 42 functions as a part of the joint inner wall 39. Supply hole 37
has a diameter corresponding to approximately half the distance between the joint peripheral wall 34 and the geometric central axis 19, the area of the feed hole 37 is smaller than the individual inner diameter area of the nozzles 23, 24, 26. The area of the feed hole 37 is significantly larger than that of the nozzle 23.24
．． and 26 at least approximately equals the sum of the inner span areas. The feed hole 37 has a geometrical central axis 38 , with respect to cross-sectional shape and height the joint inner wall 39 is equal to the joint peripheral wall 34 .

The head 12 is integrally injection molded using thermoplastic synthetic resin. The geometric center axis 44 of the head 12 coincides with the geometric center axis 19 of the adapter 13 in the completed state. The head 12 has a bottom portion 46 having a thickness of approximately 3 mm.
It's a crane. The central region of the bottom 46 is reinforced by three lips 47, each of which projects downward. These lips 47 also transition from one another to the other at their proximal ends and are arranged at equal angular spacing from each other, aligning their geometrical axes 38.52 so that the adapter 13 and head 12
When combined, they form a connected body that can be subjected to tensile loads. As shown in Figure 2, the bottom 4
In the left marginal area of 6, a discharge nozzle 4 projects upwards and has a height of about 60 m. The discharge nozzle 48 pierces the bottom portion 46 downward with a circular through hole 49 . Exhaust nozzle 48 is at approximately the 8 o'clock position as shown in FIG. The supply nozzle 51 is located at the three o'clock position as shown in FIG. That is, this supply nozzle 51 is not on the same diameter line as the discharge nozzle 48, and its geometric center axis 52 is aligned with the geometric center axis 38 of the supply hole 37 provided in the adapter 13 in the completed state. . Supply nozzle 5
1 includes an extension projecting approximately a lea below the bottom 46. At this position, the supply nozzle 51 forms a joint inner wall 53 with its extension. This inner joint wall 53 is virtually identical with respect to its contour to the inner joint wall 39 of the adapter 13 and coincides in position, especially in key areas. Furthermore, this joining inner wall 53 has a bottom part 46, which is disc-shaped and concentric with the geometrical central axis 44, which transitions at its lower end into a roof part equal to the roof 36, along the entire outer periphery. A joint peripheral wall 54 is provided. This joint peripheral wall 54 also protrudes downward like the joint inner wall 53, and similarly, its lower end transitions to the roof. Joint peripheral wall 34 of the adapter 13
The joint peripheral wall 54 of the head 12 and the joint peripheral wall 54 of the head 12 are aligned with each other in the completed state.

A column 56 projects downwardly from the underside of the bottom portion 46 for a length of about 11 hours. This column 56 has a geometric long axis of 38°52
When they are aligned, they align with the truncated column body 33, and together with the truncated column body 33, form a connecting body capable of applying a tensile load.

As shown in FIG. 2, at a position somewhat deeper than the bottom 46, the joint peripheral wall 54 forms an annular, horizontal, short bridge 57.
to move to. This bridge 57 is in liquid-tight contact with the joint peripheral wall 54 and is itself liquid-tight.

Bridge 57 is coaxial with central axis 44 . A reinforcing edge 58 with a thickness of approximately 3 mm is formed depending from the outer periphery of the bridge 57, and its lower end is above the roof of the joint peripheral wall 54. The lower end of the reinforcing edge 58 is therefore outside the area of action of the heating device for heat welding. Reinforced edge 5
8 and the joint peripheral wall 54 a reinforcing lip 59 extends at an angularly equal distance. This lip 59 also does not reach the heat welding device.

Bridge 57 integrally and fluid-tightly transitions into outwardly extending coaxial seal and clamping edges 61 .

This seal and tightening edge 61 is about 60
It runs diagonally at an angle of @, and also has a thickness of approximately 3 cranes, which is approximately the same as the bottom portion 46.

To create an integral, welded device, proceed as follows.

First, a plate at a temperature higher than the softening point of the thermoplastic synthetic resin is placed on the flat surface 62 (see FIG. 2).

On this plate the adapter 13 is pressed from below and the head 12 from above and in this case the geometric axis 19.44
and 38.52 with each other. By pulling the plate laterally and immediately pressing the hend 12 and the adapter 13 together, the softened portions in the joint peripheral walls 34, 54 and the joint inner wall 39.530M root region are removed. are fused in a fluid-tight manner.

It should be noted that it would be possible to make this device in three or more parts, or by injecting synthetic resin around one core and later melting this core away again. I can do it.

Furthermore, it is of course possible to glue the parts of the device together.

In its lower region, such a finished device is connected in a liquid-tight manner to the upper edge of the tube 16 shown in FIG.

In this case, its sealing surface 63 abuts the sealing and clamping edge 61 from below. At this time, the discharge nozzle 4 and the supply nozzle 51 extend in a direction across the through hole formed in this lid 18 as appropriate.

The lid 18 is clamped downwardly against the container 17.

Once the cartridge 14 has been exhausted (after corresponding preparatory work) the lid 18 can be removed and the device according to the invention can be removed together with the tube 16 and the cartridge 14, yet still be able to operate even in the case of very difficult to handle media. It's easy.

As shown in FIG. 1, despite the relatively thin structure of approximately 3 fl, the height of the discharge space 6G can be secured to be approximately 1.2 cm, and the discharge space 66 can be designed to be large. According to claim 1, the surface of the adapter is not contaminated with filtrate, which is often a dangerous substance, and there is no need to wipe it off. can be washed together with the head.

In addition, there is no need to use advanced technology to ensure liquid tightness in the peripheral area of the adapter and the head, and furthermore, there is no need to use advanced technology to ensure liquid tightness in the peripheral area of the adapter and the head, and furthermore, there is no need to use a short circuit between the supply nozzle and the discharge nozzle, where a slight overpressure in the discharge space may cause a short circuit. Nor.

According to the features of claim 2, no forces due to the tightening device, which must naturally be present, are applied to the head or the adapter in the area of the evacuation space, so that these can have a relatively lightweight and thin-walled shape. can. In particular, in this case the adapter does not have to be a thick plate, so a lot of material can be saved. In this way, there is no medium present at the sealing and clamping edges, nor is there any that might be present in the known art.

According to the features of claim 3, a relatively large evacuation space can be provided at the bottom of the adapter, which can be made thin and save material. If the evacuation space is large, the pressure in the evacuation space equalizes, and there is no need for special milling of the bottom of the adapter, which is required in the known technology.

Furthermore, in this case, the discharge nozzle does not need to be provided in a central position, but can be provided in an off-center position.

And the outflow resistance from the filter cartridge nozzle is nevertheless the same.

However, in this case, no short circuit due to the medium occurs.

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

According to the features of claim 5, the device is extremely rigid despite low consumption of material, and the parallelism between the adapter and the head is such that the medium is hot and/or overpressure or Negative pressure is created and/or maintained even if the filter cartridge is relatively heavy, etc.

According to the features of claim 6, no sealing problems occur (this also applies even if the rod passes through the head or the bottom of the adapter).

According to the features of claim 7, the cross-direction link is only subjected to tensile or compressive forces and hardly produces buckling effects, and even in the presence of these external forces, it is The vehicle receives significantly less force than when it is running.

According to the features of claim 8, the device can be manufactured in two parts, namely firstly the head and the adapter separately. Entire heads and adapters as well as crosslinks, nozzles, seals, clamping edges, etc. can be manufactured using a two-part injection mold without requiring large screw-down distances.

According to the features of claim 9, a cross-directional connection can also be connected to the internal pressure of the device.

Welding, which joins two parts to each other, can be effected most effectively with the features of claim 10.

According to the feature of claim 11, a space for necessary connections can be secured between the nozzles.

Moreover, when the nozzle is provided in the marginal area, it will strengthen that area and will also be easier to handle.

According to the features of claim 12, neither the mounting of the clamping plate nor the mounting of the connection can cause a supply nozzle to be confused with a discharge nozzle.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the completed device with a filter cartridge installed, Figure 2 is a cross-sectional view of the device in a cutaway state before welding, Figure 3 is a bottom view of the head, and Figure 4 is a plan view of the adapter. It is a diagram. z2--head 13--adapter 23, 24.25--nozzle 37--supply hole 4th--discharge nozzle 51-supply nozzle 66--discharge space 34, 54--peripheral wall 39, 53 ---Inner wall patent applicant: Joachim Wolf, agent Patent attorney: Takashi Suzue--

Claims (12)

[Claims] (1) a circular adapter, at least one nozzle protruding downward from the adapter and to which a filter cartridge can be connected, a supply hole formed in the adapter, and a circular shape above the adapter communicating with the nozzle; a supply nozzle projecting upwardly from the head and communicating with the supply hole; and a discharge nozzle projecting upwardly from the head and communicating with the discharge space, comprising: a) an adapter and a head; b) in its peripheral area the adapter and the head are fluid-tightly and mechanically rigidly connected by a peripheral wall; c) the adapter and the head surround the feed hole and surround the feed nozzle; A filter cartridge assembly in a filter device, characterized in that the inner walls are fluid-tightly and mechanically rigidly connected to each other. 2. A filter cartridge combination in a filter device as claimed in claim 1, characterized in that the seal and the clamping edge project radially outwardly from the peripheral area. (3) A filter cartridge in a filter device according to claim 1, characterized in that the height of the space with the evacuation space is many times higher than the thickness of the bottom of the adapter, and the inner and peripheral walls are correspondingly higher. conjugate. (4) The filter cartridge assembly in the filter device according to claim 3, characterized in that the height is at least five times as large. (5) The filter cartridge assembly in the filter device according to claim 1, wherein the connecting body capable of applying a tensile load passes through the discharge space from the lower side of the head to the upper side of the adapter and extends crosswise. (6) A filter cartridge combination in a filter device according to claim 5, characterized in that the cross-direction connector is a rod that is integral with the head and the adapter and is made of the same material as both. (7) The filter cartridge assembly in the filter device according to claim 6, wherein the cross-direction connector is provided perpendicularly to the upper surface or the lower surface. (8) The filter cartridge assembly in the filter device according to claim 1, further comprising a heat-welded portion that runs parallel to the upper surface or the lower surface and passes through the peripheral wall and the inner wall. (9) The filter cartridge assembly in the filter device according to claim 8, wherein the heat-welded portion also passes through the connecting body in the cross direction. (10) The filter cartridge assembly in the filter device according to claim 8, wherein the head and the adapter are made of thermoplastic synthetic resin. (11) The filter cartridge assembly in the filter device according to claim 1, wherein the supply nozzle and the discharge nozzle are provided in a peripheral region inside the peripheral wall. (12) The filter cartridge assembly in the filter device according to claim 10 or 11, wherein the supply nozzle is located on a line that is deviated from the diametrical line on which the discharge nozzle is located.