JPS6219215A - Membrane filter plate with carrier plate and sealing rim - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a
Membrane filter plate with aling rim (mem t=+ran ef
1lter plate).

EP-O 30081715 discloses a membrane filter plate of the above type, which has been found to be fundamentally satisfactory. This E
The fabrication in which the membrane chamber filter plate described in P-O 30081715 is particularly advantageous compared to known or standard membrane filter plates, as given in the context of the descriptions of membrane filter plates of the prior art. , is essentially based on the characteristic configuration of the transition area of the bearing surface of the carrier plate between the sealing rim and the central area of the carrier plate. This is because, in an optimal method, the mechanical stress in the membrane is kept low during transitions, such as between the pressing and filtration stages. In the membrane filter plate described above, the membrane can be replaced. This is because the angle threaded joint or threaded joint provided on the sealing rim frame part can be removed and then tightened again after inserting a new membrane.

However, a relatively large amount of alignment and adjustment work is required, making it difficult for the user or customer to replace the membrane on site.

It is therefore an object of the present invention to further develop the membrane filter plates of the prior art described above and to provide a simple field replacement of the membrane in the event of wear, etc., with optimum accuracy and with minimal effort and labor costs. stone by making it possible.

According to the present invention, the above problem can be solved in claim # (1
) and particularly advantageous embodiments of the invention form the subject matter of patent claims 2 and below.

In the present invention, the individual membranes, together with the sealing rim frame, are manufactured from solid plastic in the form of a 7-frame membrane (it is clear that it is advantageous for all the components of the membrane filter plate according to the invention to be made of plastic. ), the customer can easily replace individual membranes in the field by loosening the angle threaded joints and screws on the seal rim frame parts, replacing the membrane, and then tightening them again. become.

As a result of the advantageous characteristic configuration of the carrier plate and seal rim frame with set back or set forward () means or steps, the carrier plate serves to accommodate seal rings etc. Not only does it serve the function of determining the center point of the frame membrane, but it also serves the function of holding the frame membrane in place.
Thus, any snap connection
On) or mating connections are also not required, rather it is possible to assemble very simple components with different ages or different degrees of shrinkage obtained. This is because only the frame membrane is placed on the carrier plate and must then be centered on the carrier plate with a preferred centering towards the center of the membrane filter plate, whose cohesion is actively held in place. It is. Exhaust channels etc. are provided mostly within the membrane, which leads to a particularly simple carrier plate construction. In addition to these supply and discharge functions, four types of corner lumens (cor
ner bores) are preferably all used simultaneously as threaded connections for the carrier plate and the seal rim frame, the supply threaded joint being both possible for the passage cloth as well as the filtration threaded joint.

In a preferred configuration of the membrane filter plate of the invention with a rim step and a rim slot,
Filtration pressure from the central region of the membrane filter plate or carrier plate (which creates an outward thrust and can be absorbed by the connection between the membrane and seal rim frame and the carrier plate F)
is reduced. This is because the corresponding outwardly acting forces are absorbed by the rim seal in conjunction with the rim slot and rim step or seal rim frame(s) of the carrier plate, and at the same time are accompanied by an external release. It is from.

Thus, due to the simultaneous ejection of the seal 6, the outwardly acting forces are not absorbed in the above manner, and the tolerances that can occur if the lifetimes of the individual plastic parts of the membrane filter plate are different are avoided. The 7-frame membrane to be replaced is easily absorbed in that even if there is some dimensional difference with respect to the remaining carrier plate, it can be easily accommodated sealingly by the created rim clearance. It is also possible.

(Margin below) Example ft51 is a cross-sectional view of an example of the membrane filter plate of the present invention, which is perpendicular to the median plane of the carrier plate in the vicinity of the seal rim; , is a sectional view of the carrier plate of the membrane filter plate of FIG. 1 in the vicinity of the seal rim shown corresponding to FIG. 1, and FIG. 4 is a cross-sectional view of the intake lumen taken perpendicular to the carrier plate median plane; FIG. FIG. 5 is a cross-sectional view taken at right angles to the plane of FIGS. 1-4, FIG. 6 is a cross-sectional view through the membrane filter plate of FIG. 6 showing in further detail the discharge passages not shown in FIG. 1; FIG. 6 is an improved version compared to that of FIGS. FIG. 3 is a cross-sectional view showing an example of a membrane filter plate obtained by using the membrane filter plate.

Further features and advantages of the invention can be obtained from the following description with reference to the drawings.

As shown in FIG. 1, the membrane filter plate has a carrier plate 10 which is provided with a substantially planar carrier plate surface 12 in its central region. Carrier plate 10 (meclian plan)
e) is 14. ) is provided with a solid plastic 7-frame membrane on either side of the sealing rim frame (sealing r frame).
imframe) 16 and the actual membrane 18 together in one member,
On the sides of this member are spacer bosses 2 for applying filtration 22 etc. away from the carrier plate surface 12.
0, spacer ribs etc. are provided. This filtration is shown schematically at the bottom left side of FIG. 3, but is not shown in FIGS. 1 and 2. In Figure @1, the membrane 18 is mounted snugly in its normal, unloaded position, forming a substantially flat slab.

In the example presented here, the engagement side of the carrier plate 10 facing the membrane 18
nt face) as in the membrane filter plate of EP-O30081715 (in case further explanation is required:) EP-O300817
Please refer to No. 15. ), from the sealing rim frame 16 to the transition area between the sealing rim and the carrier plate surface 12.
region) 23 in such a way that the two desired mark lines 24, 26 are formed for the membrane 18 (this f: field is also in accordance with EP-O 30081
No. 715).

Furthermore, as seen in FIG.
On its side facing 0, the seal rim frame 16
is substantially smooth and planar and includes a setback step (set-1) ack 5tep) 28 in the vicinity of the transition region 23. In the engagement of the carrier plate facing the special seal rim frame 16, the carrier plate 1
0 has two setback trapezoidal sealing slots (sealingslot) 3 for all-round use.
0, and these slots are fitted with seal rings, as shown in FIG.
s) 32 is inserted. Close to the transition region 23,
The carrier plate 10 is provided with a protruding step 34 which, like the setback step 28 of the seal rim frame 16, is all-around so that the seal rim frame engages with the protruding step 34. Thus, the seven-frame membrane 16.18 is centered with respect to the center of the carrier plate as shown in the PttJ1 diagram.

All four corner bores of the membrane filter plate according to the invention are configured in the example presented as corner supply bores and corner discharge bores and at the same time of the carrier plate 10 and the seal rim frame 16. Configured for screw coupling. FIG. 3 shows a cross-section through the corner feed lumen 36 at right angles to the carrier plate median plane 14, which lumen is formed with different diameters to accommodate the carrier plate 10 and Both seal rim frames 16 are traversed. A threaded sleeve 38 projects on either side of the correspondingly configured bearing surface of the sealing rim frame 16 and is screwed into the carrier plate 10 by means of a corresponding threaded section, threaded! The disc 40 is screwed under pressure, causing the carrier plate 10 and the seal rim frame 16 to be held together in a fluid-tight manner by the seal ring 32. Corner feed lumens can be configured for both passageway filtration and as upstream fabric threaded couplings. In the latter case, the corner feed lumen 36 has a correspondingly extending threaded sleeve 38, as shown in dashed lines at the bottom of FIG. A corresponding threaded clamping disc (clampir + g c (isc)) 42 is fitted, which clamping disc 42 is attached to the carrier plate 10.
and a chamfered disc 40 which serves to press the seal rim frame 16 together.

FIG. 4 shows a corner drainage lumen 44, the interior area of which communicates via a passageway 46, which has a flat surface on the carrier plate median surface 14 and is used for applications such as filtration 22. It runs parallel to a number of transverse lumens 48 with a non-plain 18 surface, so that the drainage passages extend mostly into the frame membrane 16.18.

In the case of the example shown in Figure 155, EP-O800 (
According to the tjS4 diagram of No. 11715, it is possible to show how the all-round passage 46 communicates via a transverse lumen 48 with a special filter chamber. FIG. 4 shows how the drainage passageway 46 connects to the inner diameter of the corner drainage lumen 44.

In the case of the example of FIG.
is provided, so that the carrier plate 10
externally when viewed from the central area of the rim step 52
In the region of the sealing rim frame joined to, the thickness is thinner than in the region above the rim step 52 in the direction of the central region of the carrier plate 10. On the support surface facing the seal rim frame 16 , the carrier plate 10 has rim slots 54 , the inner walls of which are directed toward the central region of the carrier plate 10 and substantially aligned with the rim step 52 . has been
The outer wall 56 projects towards the inner surface of the sealing rim frame 16 to such an extent that it mates after a special rim step 52, as shown in figure vJ6. The bearing face of the carrier plate 10
) is then sloped in the direction of the carrier plate median plane 14 from the esso of the outer wall 56 to a circumferential plane aligned with the circumferential plane 50 of the seal rim frame 16 .

A rim packing 58, a sealing ring made of e.g. rubber, is inserted into the rim slot 54 under the action of a press or screw pressure holding the frame membrane 16. 10 and on the other hand, the filtration pressure acting outwardly is applied to the bottom of the rim slot 54 of the carrier plate 10 and to the outer region or circumferential area 50.
The outer seal frame 16 of the rim step 52 towards the
The area of the inner surface of the can be pressed sealingly. This eliminates the gap caused by the filtration pressure and at the same time leads to the absorption of outwardly acting forces associated with the rim seal.
Tolerances between the seven-frame membrane to be replaced and the carrier plate, etc. can be easily corrected.

The above-mentioned and claimed features of the membrane filter plate according to the invention are provided by EP-O
It is appropriate to relate the remaining features with the corresponding refinements of the membrane filter plate described in EP-O 3,008,1715, i.e. full reference is made to this EP-O 3,008,1715 for supplementing the inventive concept.

The features of the invention described in the Detailed Description and Claims sections of this specification and the accompanying drawings may be used individually or in random combination to recognize various embodiments of the invention. can be essential.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an example of the membrane filter plate of the present invention, taken at right angles to the median plane of the carrier plate in the vicinity of the seal rim; FIG. 3 is a sectional view of the carrier plate of the membrane filter plate shown in FIG. tjfJ1 in the vicinity of the seal rim corresponding to FIG. FIG. 4 is a plan view perpendicular to the median plane of the carrier plate of the corner drainage lumen of the membrane filter plate of FIG. FIG. 5 is a cross-sectional view of the membrane filter blend of FIGS. 6 is a cross-sectional view through which the discharge passages not shown in FIG. 1 are shown in further detail, and FIG. 6 shows an improved membrane filter plate compared to that of FIGS. It is a sectional view showing an example. List of reference numbers in the drawings 10: Carrier plate 12: Carrier plate surface 14: Carrier plate median surface 16: Seal rim frame 18: Membrane 20: Seal boss 22: Filtration 23: Transition area 24/2 E3: Desired bend line 28 Two setback steps 30: Seal slot 32: Seal ring [ 34: Protrusion step 36: Corner supply lumen 38: h screw-in sleeve 40: Screw-in disc 42: Tightening disc 44: Supply lumen 46: Passage
48: Lateral lumen 50: Circumferential surface 5
2: Rim step 54: Rim slot 56: Outer wall 58: Rim seal agent

Claims (12)

[Claims] (1) a carrier plate, at least one membrane disposed on one side of the carrier plate and preferably provided with spacer bosses or the like for engagement such as filtration, surrounding the carrier plate and the membrane and substantially a sealing rim joining the carrier plate and membrane together in a fluid-tight manner, one or more of the sealing rims parallel to the median plane of the carrier plate on the side having the membrane or on either side of the carrier plate; The inner surface is spaced apart from the plane of the membrane in the normal unloaded position, and the mating surface of the carrier plate facing the membrane is aligned between the connection line of the membrane to the sealing rim and the center of the carrier plate. In the transition region between the regions, the carrier plate support surface is inclined towards the carrier plate median plane and whose central region extends parallel to the carrier plate median plane, so that it faces the membrane. In each case, one desired bend line for filtration or a drawing step extending from the connecting line of the membrane to the sealing rim is first substantially parallel to the midplane of the carrier plate, and then preferably at an angle of 3 to 15° and in particular at an angle of 10 to 15° towards the sealing rim and then substantially over essentially the entire central area of the carrier plate with respect to the carrier plate median plane. or having a continuously varying bend passing from the connecting line to the carrier plate surface in the central area of the carrier plate in the transition region, while avoiding clearly defined bend lines. A membrane filter plate for a filter press or the like configured as a beveled surface, characterized in that the seal rim frame and the membrane are configured as an integral plastic material frame membrane. (2) the sealing rim frame (16) of the frame membrane (16, 18) on the inner surface parallel to the carrier plate median plane (14) and facing the carrier plate (10) is substantially planar; , the carrier plate (10) has in each case on its support surface facing the sealing rim frame (16) at least one sealing slot (30) with an inserted sealing ring (32) or the like. It has a seal rim frame (16
), the carrier plate (10) is in the vicinity of the sealing rim frame and forming a protruding step (34), further towards the central region than in the region following it with respect to the protruding step. It is constructed with a small thickness and has a seal rim frame (16
) is characterized in that it has a setback step (28) in the vicinity of the transition region cooperated by a protrusion step (34) for centering the frame membrane (16, 18) with respect to the carrier plate (10). A membrane filter plate according to claim (1). (3) Membrane filter plate according to claim (2), characterized in that the sealing slot (30) is configured in a setback trapezoidal manner. (4) the seal rim frame (16) and the carrier plate (10) are each provided with corner supply and discharge lumens (36, 44), which lumens are in each case threaded at each end; traversed by a threaded sleeve (38), preferably of plastic material, having a threaded disc screwed into the sleeve end sealing the sealing rim frame (16) and the carrier plate (10) together. The membrane filter plate according to any one of claims (1) to (3), characterized in that it is pressed. (5) Seal rim frame in each case (1
6) has one passageway (46) extending parallel to the carrier plate median plane (14), which passageway connects with the lumen near the corner drainage lumen and is connected to the filter cloth ( Membrane (1) used to apply 22) etc.
Claim (4) characterized in that the fluid connection is made through a plurality of lateral lumens (48) having surfaces of:
Membrane filter plate as described in section. (6) according to claim 4 or 5, characterized in that the corner feed screw coupling (36) in each case comprises a cloth screw coupling (42) membrane filter plate. (7) The cloth screw coupling in each case is
Membrane filter plate according to claim 6, characterized in that, in addition to the threaded disc (40), it has a tightening disc that can be screwed onto the threaded sleeve (38). (8) carrier plate adjacent to the circumferential surface (
The sealing rim frame (16) in the outer region of the inner surface facing the setback rim step (52)
), the sealing rim frame (16 ) has an edge slot (54) on the carrier plate support surface facing the carrier plate (10), and the inner wall towards the central area of the carrier plate (10) has an edge step of the sealing rim frame (16). An outer wall (56) substantially aligned with (52) and extending substantially parallel to the circumferential surface of the seal rim frame mates after the edge step (52) of the frame. , and a rim seal (58) is inserted into the edge slot (54), which rim seal seals the outside of the inner surface of the rim frame (16) continuing onto the outer wall (56) as well as the edge step (52). Membrane filter plate according to any one of claims 2 to 7, characterized in that it can be pressed so as to seal the area as well. (9) A membrane filter plate according to claim (8), characterized in that the rim seal (58) is configured as a seal ring. (10) Membrane filter plate according to claim 8 or 9, characterized in that the rim seal (58) is able to press the bottom surface of the rim slot (54). (11) Claim characterized in that the support surface of the carrier plate (10) is inclined in the direction of the carrier plate median plane (24) from the edge of the outer wall (56) of the rim slot (54) relative to the circumferential surface. The membrane filter plate according to any one of items (8) to (10). (12) Claim (2) characterized in that the rim slot (54) has a setback trapezoidal structure.
The membrane filter plate according to any one of items 1 to 11.