filter plate

Abstract

A filter plate has a central working surface (1) and a plate frame (2), which frames the working surface (1) in the manner of a frame edge and has an increased material thickness compared to the working surface (1), so that the plate frame (2) protrudes perpendicularly from the plane of the working surface (1) at least on one side, wherein the central working surface (1) and / or the plate frame (2) and / or a subassembly or an additional component mounted in the working surface (1) or the plate frame (2) has two regions, which are filled with the same material but have different material filling densities.

Description

Technical Field

[0001] This invention relates to a filter plate having a central working surface and a frame surrounding the working surface. The working surface can be rigid or designed as an elastic membrane. The working surface typically has protrusions on its surface for removing liquid from the spaces formed between the protrusions. The working surface of the filter plate is therefore also referred to as a drainage field. Background Technology

[0002] The filter plate frame encloses the work surface with one side. The frame extends vertically beyond at least one side of the work surface. If the frames of two adjacent plates extending vertically beyond the work surface are placed next to each other, a cavity is formed that can effectively serve as a working space, i.e., a filter chamber. Typically, multiple such filter plates are arranged side-by-side to form multiple side-by-side filter chambers. This type of filter plate is also called a box-type filter plate. Side-by-side arranged filter plates are also called a plate assembly.

[0003] In another embodiment of the invention, the plate frame may protrude from both sides of the working surface. Each filter plate then forms a filter chamber on both sides of its adjacent filter plate.

[0004] The components or attachments built into the working surface or frame can be of various types, particularly handles, grippers, filtrate or suspension inlets or outlets, etc. These components can be attached to or built into the filter plate, forming a single unit.

[0005] Filter panels known in the prior art are very heavy. Therefore, they are difficult to lift and transport. Furthermore, very large frames with high load-bearing capacity are required to support assemblies of such heavy panels.

[0006] Document DD116758 describes a filter plate with a filter frame consisting of a shell of high-density material and a foam core of another material inserted into the shell. To achieve this, the shell must first be molded in a first operation, and then the foam core must be molded in a second operation.

[0007] Based on this, the objective of the present invention is to provide a filter plate with the lowest possible weight. Summary of the Invention

[0008] The task is solved in an inventive manner by a combination of the features of claim 1. The following appended claims include further embodiments of the invention, which are advantageous in themselves and in part inventive.

[0009] The working surface and / or the frame and / or the components or attachments built into the working surface or the frame have at least two regions filled with the same material but with different material packing densities to reduce weight. Therefore, in the basic structure of this invention, only one material or substance is processed during production. High material packing density is used where the filter plate requires high strength or high stability. Because the different regions of the working surface or frame, or the components or attachments assembled into the working surface or frame, have different material packing densities, a molded assembly with a geometric structure is produced. The working surface, frame, and / or the components or attachments assembled into the working surface or frame thus have a three-dimensional geometric volumetric structure. Regions with high strength are densely packed with material (i.e., have a higher material packing density), while other regions have a lower material packing density.

[0010] The material packing density describes the partial material distribution. In regions with high material packing density, a large amount of material is introduced (especially injected) relative to the component volume. Therefore, the material is densely packed. In regions with low material packing density, a smaller amount of the same material is introduced or injected relative to the volume. Therefore, the material packing density is lower. High and low material packing density regions seamlessly merge with each other. Therefore, partial material distribution can be selectively controlled, i.e., the distribution of materials used in the component can be controlled. Most importantly, materials can be processed in a single operation, and the corresponding material packing density can be precisely controlled during material processing.

[0011] The material filling densities of adjacent regions with different material filling densities continuously merge with each other. In mathematical terms, a continuously differentiable function describes the transition between two adjacent regions with different material filling densities.

[0012] A filter plate can be composed entirely of a single material and have regions with varying material packing densities. Different materials can also be combined. Different materials can be used to create different regions of a filter plate with varying material properties. Furthermore, different materials can also be used to create regions with varying material packing densities.

[0013] The first obvious advantage is that using these areas with different material packing densities reduces weight. Furthermore, less material is consumed in the lower-density areas. Finally, the filter plate can be adapted to its specific application. Areas with different material packing densities can be used to control temperature distribution in the working surface and / or the plate frame and / or in components or attachments mounted on the working surface or plate frame. This also applies to the orientation of bends and torsion lines in the working surface and / or the plate frame and / or in components or attachments mounted on the working surface or plate frame.

[0014] In an advantageous embodiment, the working surface and / or the frame and / or the components or attachments mounted on the working surface or frame are constructed in layers. Each layer embedded in the working surface and / or the frame and / or the components or attachments has a different material filler density. The material filler density at the transition points between these layers is, in the sense of the invention, continuously rather than discontinuously combined.

[0015] In another embodiment, the plate frame is penetrated by one or more holes. The holes extend like channels within the plate frame, thereby forming an outlet or inlet for the filter plate.

[0016] Because the outer wall of the filter plate is subjected to particularly high stress and typically bears high loads, the outer wall of the plate frame usually has a very high material packing density. In an advantageous embodiment, the perforation sleeve of the aforementioned hole has the same high material packing density as the outer wall of the plate frame, and even in an extreme example, the perforation sleeve of the hole has the same material packing density as the outer wall of the plate frame. One or more intermediate layers with lower material packing density are provided between the outer wall of the plate frame and the perforation sleeve, and the material packing density of each layer is continuously integrated with the intermediate layer.

[0017] In another advantageous embodiment, the outer wall of the plate frame has a significantly higher material packing density than the orifice sleeve. Typically, the orifice sleeve experiences much less stress than the outer wall of the plate frame. Finally, using an orifice sleeve with a lower material packing density may also be advantageous in order to dissipate the high temperature of the fluid flowing through the orifice.

[0018] In an advantageous embodiment, a geometric infill pattern is used to reduce the material fill density, such as a honeycomb structure or material layers adjacent to each other in a zigzag shape. By varying the material fill density in different regions of the filter plate, the mechanical and / or physical properties of those regions can be adjusted. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0020] The attached diagram shows:

[0021] Figure 1 This is a top view of the filter chamber of the filter plate.

[0022] Figure 2 yes Figure 1 Section II–II

[0023] Figure 3 It is a cross-section of a plate frame with stacked layers of different material fill densities.

[0024] Figure 4 Side view of a plate frame with five adjacent holes.

[0025] Figure 5 yes Figure 4 The VV section portion,

[0026] Figure 6 Side view of a plate frame with holes.

[0027] Figure 7 yes Figure 6 Section VII-VII

[0028] Figure 8 It is a sectional view of the plate frame.

[0029] Figure 9 It is a plate frame with a central hole and an inlet channel associated with the hole.

[0030] Figure 10 It is the edge of a plate with a central hole.

[0031] Figure 11 It is a filtrate discharge insert that can be integrated into the filter plate.

[0032] Figure 12 Is with Figure 11 Compared to the alternative design of the filtrate discharge port,

[0033] Figure 13 It is a suspended feed insert that can be integrated into the filter plate. Detailed Implementation

[0034] All accompanying figures illustrate component layers (6, 7, 8, 9a, 9b, 9c, 9d, 9e, 9f) and elements with different material filler densities. To clearly illustrate the different material filler densities, the different component layers (6, 7, 8, 9a, 9b, 9c, 9d, 9e, 9f) and elements are clearly demarcated from each other. However, unless otherwise explicitly stated, for the purposes of this invention, it applies to all adjacent component layers (6, 7, 8, 9a, 9b, 9c, 9d, 9e, 9f) and elements whose respective material filler densities are continuously, smoothly, and stably integrated with each other.

[0035] Figure 1 The filter plate shown consists of a central working surface 1 and a frame 2 surrounding the working surface 1. The frame 2 has reinforced corner regions 3. This means that the corner regions 3 protrude deeper into the working surface 1 than other areas of the frame 2. Finally, a handle 4 is attached to the outer side of the frame 2, which can be used to lift and move the filter plate. The lower side 5 of the handle 4 can also be used as a support surface for placing the filter plate on a bracket.

[0036] exist Figure 2In the cross-sectional view, it can be seen that the frame is formed by a high material density layer 6, a waffle-patterned material layer 7, and a low material density layer 8.

[0037] Figure 3 Several component layers 9, 9a, 9b, 9c, 9d, 9e, and 9f are shown arranged side by side. The topmost component layer 9 is similar to... Figure 2 The high material fill density of the 6th layer of the module, and Figure 3 The component layer 9f shown at the bottom is similar to Figure 2 Layer 8 is a low-density material filler layer. Looking from the bottom layer 9f, the upper layer 9e has a higher material filler density. Therefore, it has a denser volume. Module layer 9d has a higher material filler density than module layers 9e and 9f. Module layer 9c has a lower material filler density than the two module layers 9b and 9a arranged above it. In other words, the material filler density of the module layers increases continuously from the lower module layer 9f to the uppermost module layer 9, and the material filler densities of adjacent module layers 9a to 9f (as already explained) blend together continuously and smoothly.

[0038] from Figure 4 As can be seen from the diagram, the material filling density of the outer wall 10 of the plate frame 2 is higher than that of the intermediate layer 11. The intermediate layer 11 is therefore arranged between the hole sleeves 12 of the five adjacent holes 13 and the outer wall 10 of the plate frame.

[0039] exist Figure 5 In the cross-sectional view, it is clear that the outer wall 10 and the orifice sleeve 12 are made of materials with the same material filler density, but it is also possible to choose different wall thicknesses for both the orifice sleeve 12 and the outer wall 10. The intermediate layer 11 with a lower material filler density is embedded between the outer wall 10 and the orifice sleeve 12. The orifice end 14 has the same material filler density as the outer wall 10 and the orifice sleeve 12.

[0040] Figure 6 An example of hole 13 is shown again. Here, the outer wall 10 of the plate frame 2 has an extremely high material fill density, while the hole sleeve 12 has a much lower material fill density than the outer wall 10 of the plate frame 10. However, the material fill density of the hole sleeve 12 is again much higher than that of the intermediate layer 11. Figure 8 The plate frame 2 is shown, whose lower outer wall 10 has a higher wall thickness than the upper outer wall 10, and therefore also has a higher material filling density. Figure 8 Different intermediate layers 11 with different material filling densities are provided between the outer walls 10.

[0041] at last, Figure 9A portion of the plate frame 2 and the working surface 1 arranged within the plate frame are shown. In this arrangement, the space between the protrusions 15 can be used as a drainage channel. The working surface 1 is therefore also referred to as a drainage field. Furthermore, Figure 9 The plate frame 2 also has an outer wall 10 with a high material filling density. The outer wall 10 is connected to two inlet channels 17 leading to holes 13. The inlet channels 17 can also be used as discharge ports. Figure 9 In the middle, the casing 12 of the hole 13, the outer wall 10, and the shell of the feed channel 17 have the same material filling density.

[0042] Figure 10 A portion of a filter plate having a frame 2 and a working surface 1 surrounded by the frame 2 is shown again. Here, the working surface 1 also has protrusions 15 and spaces 16 arranged between the protrusions 15. Figure 10 In this embodiment, it is another filter plate with a drainage field. Here, the outer wall 10 of the plate frame 2 has a higher material filling density than the perforated sleeve 12 of the central hole 13. Between the perforated sleeve 12 and the outer wall 10 of the plate frame 2, there is again an intermediate layer 11 with a lower material filling density.

[0043] Figure 11 A typical filtrate drain insert 18 is shown, which can be integrated into the working surface 1 of a filter plate. Like the working surface 1, the filtrate drain insert 18 has protrusions 15 and spaces 16 disposed between the protrusions 15. Furthermore, the filtrate drain insert 18 has a drain edge 20 pierced by a drain opening 19. In an embodiment, the drain edge 20 has a much higher material packing density than other areas of the filtrate drain insert 18 (e.g., small sections 15).

[0044] Figure 12 The filtrate discharge plug 18 is shown. Figure 11 An alternative design can be integrated into the edge 2 of the filter plate. The filtrate discharge insert 18 has a discharge edge 20. A cover 21 protrudes at a right angle from the discharge edge 20. Teeth 22 protrude from the cover 21 to form a drain grid. Each of two adjacent teeth 22 leaves a free outlet opening 19 between them. In an embodiment, the outlet edge 20 has a much higher material packing density than other areas of the filtrate discharge insert 18 (e.g., teeth 22).

[0045] at last, Figure 13 It shows a central feed port 24 and an insertable... Figure 13 The mounting ring 25 in the opening (not shown) is a suspended feed insert 23. In this embodiment, the mounting ring 25 has a material fill density significantly higher than that of the cover layer of the suspended feed insert 23 pierced by the feed port 24.

[0046] Reference Symbol Table

[0047] 1. Working face

[0048] 2. Board frame

[0049] 3. Corner Area

[0050] 4 handles

[0051] 5. Bottom

[0052] 6 High-density material filling layer

[0053] 7. Waffle pattern arrangement material

[0054] 8 Low material density layer

[0055] 9(9a-9f) Component Layer

[0056] 10 outer wall

[0057] 11. Intermediate Layer

[0058] 12-hole sleeve

[0059] 13 holes

[0060] 14-hole end

[0061] 15. Protrusions

[0062] 16 Intermediate Space

[0063] 17. Entrance passage

[0064] 18 Filtrate Discharge Plug

[0065] 19. Exit opening

[0066] 20 Emissions Edge

[0067] 21 Cover plate

[0068] 22 teeth

[0069] 23 Suspended feed insert

[0070] 24. Entrance opening

[0071] 25 Mounting Ring

Claims

1. A filter plate having a central working surface (1) and a frame (2), the frame surrounding the central working surface (1) with a frame edge and having an increased material thickness compared to the central working surface (1), such that the frame (2) protrudes vertically from at least one side of the plane containing the central working surface (1), characterized in that: The central working face (1) and / or The plate frame (2) and / or The components or additional parts built into the central working surface (1) or plate frame (2) have a three-dimensional geometric volume structure and at least two regions filled with the same material, and the material filling density of the at least two regions is different, so that the region with high strength is densely filled with material and has a higher material filling density, while the other regions have only a lower material filling density. The central working surface (1) and / or the plate frame (2) and / or the components or additional parts built into the central working surface (1) and / or the plate frame (2) and / or the components or additional parts mounted on the plate frame (2) have different geometric filling patterns (7) to achieve different material filling densities.

2. The filter plate as described in claim 1, characterized in that: The material filling density of adjacent areas is continuous and smoothly integrated with each other.

3. The filter plate according to any one of claims 1 to 2, characterized in that... Regions with different material filling densities have different stiffness and / or strength.

4. The filter plate as described in claim 1, characterized in that... The central working surface (1) and / or the plate frame (2) and / or the components or additional parts installed in the central working surface (1) or the plate frame (2) are composed of multiple layers with different material filling densities, one layer being on top of another and / or adjacent to each other.

5. The filter plate as described in claim 1, characterized in that... At least one hole (13) passes through the central working surface (1) and / or the plate frame (2) in a channel, and the material filling density of the outer wall of the plate frame (2) and the hole sleeve (12) is higher than that of the intermediate layer (11) located between them.

6. The filter plate as described in claim 5, characterized in that... The outer wall of the central working surface (1) and / or the plate frame (2) has a higher material filling density than that of the perforated sleeve (12).

7. The filter plate as described in claim 1, characterized in that... Different areas of different material fill densities on the central working surface (1) and / or the plate frame (2) and / or the attached or mounted components or additional parts have different mechanical and physical properties.

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