TW478947B - Leaf filter - Google Patents

Abstract

To increase the total filtering area while enhancing the cleaning efficiency of filter cloth by devising the form of core filter leaves and the arranging state thereof in a leaf filter wherein a plurality of core filter leaves are radially provided on the outer periphery of a filtered liquid collecting cylinder in a protruded state. Auxiliary core filter leaves 2B with predetermined length are provided to the leading ends of radially arranged main core filter leaves 2A so as to cover the leading ends of the adjacent main core filter leaves 2A and successively being bent in the same direction, and spacers 4 forming liquid passages are interposed between overlapped surfaces where the adjacent auxiliary core filter leaves are overlapped with each other. Bag-shaped filter cloths 3 are put on the main core filter leaves 2A and the auxiliary core filter leaves 2B so as to straddle both filter leaves. Both main and auxiliary core filter leaves 2A, 2B may be integrated or may be provided separately. Auxiliary spacers 5 are preferably interposed between the adjacent main core filter leaves 2A.

Description

478947 V. Description of the invention (1) The technical field of the invention The present invention is directed to a fan-shaped filter in which a plurality of filter elements and fan blades are arranged radially on the outer peripheral surface of the filtered liquid collection cylinder, except that The front end of the core fan blade is extended with a set of auxiliary filter blades of a certain length. By specifying its configuration state, in addition to greatly increasing the filtration efficiency per filter volume of the filter ^, it can also improve the cleaning of the filter cloth. Fan-shaped filter ^ filter ^ 知 知 技 # Figures 7-9 show the structure of a conventional fan-shaped filter of the above type. " This fan-shaped filter, as shown in Fig. 7, houses the filter unit 50 in a cylindrical case 60 to which the liquid to be filtered has been supplied. The filter sheet 50, as shown in the partial cross-sectional view of FIG. 8, is provided with a plurality of approximately rectangular plate-shaped fan blades 5 2 protruding radially around the cylinder shaft of the filtered liquid collection cylinder. , Its appearance is like the shape of a cylindrical body provided with deep wrinkles in the circumferential direction of the cylinder. ° 5 3 in the figure is a filter cloth. As shown in Figures 8 and 9, the strip-shaped long-length filter cloth is in the circumference of the filter unit 50 and along one of the filter blades 5 2 The outer peripheral surface is sequentially folded to be sewn into a cylindrical shape with wrinkles. ° Sea filter 2 5 3, as shown in Fig. 8, is the force across each filter element fan blade 5 2 in order to be covered, and the two cylinder ends are installed at the two ends of the filtered liquid collection cylinder 5 1 t C7 AI > 1 person & 1, < As early as 5 4 ', it was fixed freely. Compared with the filter using a cylindrical filter cloth without a wrinkle I # 早 、、 on the filter cloth, the fan-shaped filter of the fan type f, the filter unit of each filter unit, the shell of the filter; It is considered that the area will become very wide, and high filtration efficiency is obtained.

478947

V. Description of the invention (2)

The problem of desire jLl · The purpose of the present invention is to address the above-by reviewing the shape and configuration of the fan blades of each element: ^ Filter machine's increase: In addition to greatly increasing the total filtration area, it can also increase : = Rate, which greatly improves the filtration capacity and even the cleaning of m ^ leaf filter and machine. The invention of the operating efficiency of money The present invention is to arrange a plurality of filter element fan blades, which is characterized in that: in order to achieve the above purpose, a radial fan-shaped filter is provided, and the filter fan blades (2) are arranged to be radiated. The front end of the main filter element blade (2 A) is formed by extending a secondary filter element blade (2B) of a certain length. Each secondary filter element blade (2B is like the front end of the adjacent main filter element blade (2 A)). The ground is sequentially bent in the same direction, and in this state, the spacer (4) forming the liquid flow path is placed between the overlapping surfaces of the adjacent secondary filter element blades (2 B) overlapping each other. The bag-shaped filter cloth (3) covered with the filter element fan blade (2) is provided in a shape covering the main filter element fan blade (2 A) and the auxiliary filter element fan blade (2 B). The main filter of each individual body The fan blades (2 A) and the auxiliary filter fan blades (2B) are stored in a bag-shaped filter cloth (3) in a row. The spacer (4) is provided so that it can overlap each other. Field】 The genus leaves (2B) have a function of being able to freely engage / disengage with each other. The auxiliary space that keeps the distance between each other The piece (5) is located between the adjacent main heart blades (2 A).

478947 V. Description of the invention (3) Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 and 3 and 4. The basic structure of the fan-leaf filter of this embodiment is substantially the same as the conventional fan-leaf filter of the type shown in FIGS. 7 to 9. The characteristic part of the filter of the present invention is the shape and arrangement state of the filter element blades of the filter unit A 1 corresponding to the filter unit 50 of the conventional example. Fig. 1 shows a cross section of a part of the worrying unit A 1 of this embodiment (equivalent to Fig. 8 of the conventional example). In the figure, reference numeral 1 is a filtered liquid collection cylinder, and a plurality of filter element fans 2 are projected radially on the outer peripheral surface. The filter element fan blade 2 of this embodiment is fixed at its base end to the outer peripheral surface of the filtered liquid collecting cylinder 1 and has a substantially rectangular plate-shaped main filter element fan blade 2 A, and a certain length is extended at the front end thereof. The secondary filter element blade 2B is formed. In addition, as described above, each of the auxiliary filter element blades 2B covered with the bag-shaped filter cloth 3 spans the front end of the adjacent main filter element blades 2A, and is sequentially bent in the same direction at a substantially right angle. Therefore, in a state where the assembling of the filter unit A 1 is completed, the adjacent sub-element fan blades 2B are overlapped with each other as shown in the figure. However, if the overlapping portions are completely in close contact with each other, the effect of increasing the filtering area is considerably reduced by the auxiliary filter element blade 2 B. Here, as described above, a spacer 4 is formed between the adjacent auxiliary filter element blades 2B and 2B to form a liquid-passing path a through which the filtered liquid flows. In this embodiment, a small piece of magic tape is used as the spacer 4. The magic belt is dotted in the overlapping portion of the fan blades 2B of each auxiliary element 1 1__1

IS ¥

89115848.ptd Page 7 V. Description of the invention (4) The women's clothing also has the surface of each bag-shaped filter cloth 3, so that the auxiliary filter magic belts have the function of forming the liquid flow path a. -The role of the state [The thickness of Yu body 4 is preferably approximately-or more. Then, the function of the filtering unit M will be described. The filter unit A shown in 1 and the conventional method shown in FIG. 8 are used. Operation: Two know the total filter surface of the filter unit M. Single :: a unit that adds the number of secondary filter blades 2B. "Early 50% increase In addition, as mentioned above, because the diameter of the adjacent secondary filter element a, therefore, the fluid path will not be damaged there. If the total area of the filter unit A1 is increased, Start the filtering operation to f to remove the heap_ to extend one cycle of the filtering operation. If the filter and slag are removed, the operation efficiency of the following complicated filter decreases. x, because the operation of forming a filter aid layer on the surface of the cloth after washing: To extend the filtration cycle, it will be significantly improved as d ... According to the next figure, Figure 2 is the second implementation of the present invention Cross-section view. Part of the first embodiment of the filtering unit A1 of U. The first unit of the filtering unit A 1 _ lion deputy 遽 core fan lion, ㈣: in the main filter fan the material can be: the net shown in Figure 3, Figure 4 The material may be, for example, a metal mesh made of stainless steel or a grid-like body.

89115848.ptd Page 8 478947 V. Description of the invention (5) The second difference is that the main filter element fan blade 2 A and the auxiliary filter element fan blade 2 B are separated into individual bodies as shown in the figure. In addition, the bag-shaped filter cloth 3 is covered by the main and auxiliary filter element blades 2 A and 2 B arranged in a vertical line, so that the two are combined together. With this configuration, the sub-element fan blade 2B is easily bent at a position connected to the main element fan blade 2A. In addition, a restraining mechanism for hanging a rope or the like may be provided at this connection position so that the facing distance between the front and back surfaces of the bag-shaped filter cloth 3 does not expand. The third difference is that the auxiliary excitation spacer 5 is located between the adjacent bag-shaped filter cloths 3 and 3. Thereby, even if the main filter element blades 2A have flexibility, the main filter element blades 2A and 2A adjacent to each other can be maintained at a certain opposed interval. In addition, when the cleaning solution of the bag-shaped filter cloth 3 is caused to flow in a direction opposite to that during the filtering operation, that is, when π countercurrent washing is performed, the bag-shaped filter cloths 3 expand and protrude, and mutually Bite situation. Furthermore, as shown in FIG. 2, the spacer 4 between the sub-element fan blades 2B overlapping each other, at this time, the front end side of the above-mentioned mesh material is extended, and the part is bent to extend along the sub-element. The outer side of the filter blade 2B. In this way, the bent portion is used as a spacer for securing a liquid passage between the inner peripheral surface of the housing 11 of the filter and the auxiliary filter element blade 2B. Alternatively, the bent portion may be omitted, and the ropes may be wound around the outer peripheral surface of the assembled filter sheet A2 to prevent the auxiliary filter element blades 2B from expanding.

89115848.ptd Page 9 478947 V. Description of the invention (6) The auxiliary spacer 5 is manufactured by, for example, bending a metal net or the above-mentioned net-like material into a wave plate shape. The 6 series in Fig. 2 is a planting sleeve for planting the main filter element fan blade 2 A group on the outer peripheral surface of the filtered liquid collecting cylinder 1. 5 and 6 show the features of the filter units A1 and A 2 according to the present invention, and the cleaning efficiency of the bag-shaped filter cloth 3 is improved. It is incorporated in the bottom of the housing 11 of the filter as An embodiment of the filter cloth cleaning mechanism B of the previous case (Patent No. 30 丨 6509). The filter cloth cleaning mechanism B, as shown in FIG. 5, is disposed directly below the filter unit A1 (or A 2), and the air-jet ring 2 is used to spray air bubbles for cleaning the bag-shaped filter cloth 3. 0 as its body. As shown in FIG. 6, a plurality of air-jet rings 20 made of a tube are used to radially radiate between the outer ring 21 and the inner ring 22 having a smaller diameter. Eight spokes 23. In addition, each of the spokes 23 is arranged or located between the adjacent main filter element blades 2A, 2A, and the lower side of the liquid-passing area 6 (see FIG. 丨) that is fan-shaped when viewed from the plane. On the inner and outer sides of the rings 21, 22, and the spokes 23, each of the inner spaces is connected to each other, in addition to the number of air holes. In addition, an air supply pipe 31 for supplying pressurized air to the outer ring 2 is provided at the bottom of the housing 11 with a liquid guide pipe 32 and a liquid discharge pipe 33. Moreover, although the illustration is omitted, a liquid level mechanism for moving the liquid level of the cleaning liquid in the casing 11 up and down according to the purpose described later is attached.

89115848.ptd Page 10 478947 V. Description of Invention (7) Structure. Next, the function of the filter cloth washing mechanism B will be described. When cleaning the filter unit A1, in addition to flowing the cleaning liquid into the casing 11 from the liquid guide pipe 32, the compressed air is also supplied to the air jet ring 20. As a result, the air bubbles ejected into the cleaning liquid from each of the air-jet holes c are concentrated and strongly risen in a state where they are closed in the respective liquid-passing areas 6 whose peripheral walls are substantially closed. When the air bubbles reaching the liquid surface of the cleaning solution are broken, the liquid surface is fiercely disturbed, and by using this disturbing energy, it is possible to efficiently filter and flake off the surface of the bag-shaped filter cloth 3. In addition, in this cleaning operation, when the liquid level in the casing 11 is moved up and down by the liquid level down mechanism described above, the bag-shaped filter cloth can be cleaned quickly and surely without omission. 3 的 面面。 The whole surface of 3. Effect of the Invention As described above, the fan-leaf filter of the present invention has excellent practical effects as listed below compared to the conventional fan-leaf filter of the type shown in Fig. 8 and the like. (a) The auxiliary filter element fan blades are respectively extended at the front ends of the main filter element blades which are arranged in a radial shape, so that the filtering area of the filter can be greatly enlarged. (b) The filtering efficiency of the filter can be increased proportionally to the square of the filtering area. With the increase of the filtering area, the filtering and efficiency can be significantly improved. (c), because if the filtering area is increased, it can be extended until the filter cloth is washed

89115848.ptd Page 11 478947 V. Description of the invention (8) The time required to stop the filter can greatly suppress the reduction of the operating efficiency of the filter caused by the cleaning process. (d) The spacers existing on the overlapping surface of the adjacent secondary filter element blades can easily fix the assembled shape of the filter unit in addition to forming a liquid flow path on the overlapping surface. (e) The spacers and auxiliary spacers located between the adjacent main and auxiliary filter element blades and the auxiliary spacers are used to prevent the filter cloth from swelling when the filter cloth is washed by backwashing. (f) The liquid-passing area formed between the adjacent main filter element blades and the peripheral wall of which is almost in a closed state can further improve the cleaning efficiency of the attached filter cloth cleaning mechanism. (g). Improving filtration efficiency can make the shape of the filter more lightweight. Description of component numbers Al, A2 Filter unit B Filter cloth cleaning mechanism D, E Mesh material 1 Filtered liquid collection tube-2 Filter, core fan tea 2 A Main filter fan blade 2B Sub filter fan blade 3 Bag filter cloth 4 spacer 5 auxiliary spacer

89115848.ptd Page 12 478947 V. Description of the invention (9) 6 Implant sleeve 11 Housing 20 Air-jet ring 21 Outer ring 22 Inner ring 23 Spoke 31 Air supply pipe 32 Catheter tube 33 Drain tube a Flow path b Flow field c Air vent

89115848.ptd Page 13 478947 Brief description of drawings Figure 1 shows a first embodiment of the present invention, which is a partial cross-sectional view of a filter unit. Fig. 2 shows a second embodiment of the present invention and is a partial cross-sectional view of a filter unit. Fig. 3 is a partial perspective view showing an example in which a mesh material is used as the material of the filter blade. FIG. 4 is a partial perspective view showing another example of the mesh material. Fig. 5 is a longitudinal sectional view showing an embodiment in which a filter cloth cleaning mechanism is attached to the housing of the filter. Fig. 6 is a perspective view showing a gas jet ring constituting a body portion of a filter cloth cleaning mechanism. Fig. 7 shows a conventional example, and is a longitudinal sectional view of a filter body. Fig. 8 is a partial cross-sectional view showing a filter unit. FIG. 9 is a perspective view showing the overall shape of the filter cloth.

89115848.pul page 14

Claims (1)

478947 6. Scope of patent application1. A fan-shaped filter, which is equipped with multiple tear-off male fan blades in a radial configuration, is characterized by: " ^ The above filter element fan blades (2) 'are in the configuration Radial main filter fan blade (2A) is formed by extending the auxiliary filter fan blade (2B) with a certain length, and each auxiliary filter fan blade (2 B) is covered by the adjacent main filter fan blade (2 A). ) The front end is bent in the same direction in sequence, and in this state, the spacer (4) forming the liquid flow path is overlapped with the above-mentioned filter fan blades (2 B) adjacent to each other. Overlapping faces. 2. The fan-shaped filter according to item 1 of the scope of patent application, wherein the bag-shaped filter cloth (3) covered with the above-mentioned filter element fan blade (2) is provided with the main filter element fan blade (2A) and the auxiliary filter element. Fan blade (2B) covered with ^ -shaped. 3, such as the fan leaf filter of the scope of application patent No. 丨 or 2, in which the main filter element fan blade (2A), the secondary core fan blade (2B), respectively Stored in a bag-shaped filter cloth (3). 4. The fan-shaped filter according to item 丨 of the patent application, wherein the spacer (4) 'is provided with a secondary filter element fan blade (2 Β) which can be overlapped with each other to be freely engaged / detached from each other. Features. 5 · The fan-shaped filter as described in the first item of Shenqiao's patent scope, which makes the auxiliary spacer (5) maintaining the space of $ 22,22 between the adjacent main filter blades 89115848.ptd Page 15