JPS59132911A - Filter - Google Patents

Abstract

PURPOSE:To enhance the backwashing effect of a filter element, by forming the filter element by stacking plates each having recessed and protruded parts provided to the upper and lower surfaces thereof while providing an element guide capable of enlarging the gaps of the filter element. CONSTITUTION:A fluid containing solid foreign matters is flowed into a cylindrical filter element 5a from the outer (or inner) side thereof and passed through the gaps between laminated flat discs of the element 5a to be discharged to the inner (or outer) side of the element 5a. Foreign matters are collected at the inlet of the gaps of the flat discs. Each gap between flat discs forms a certain flow path by slightly shifting the directionality of processed grooves provided to the upper and lower surfaces of said flat disc. When foreign matters are accumulated on the element, an element guide 9 is moved from a usual position 9c to a position 9b. By this mechanism, the distance between the discs is enlarged and foreign matters tightly accumulated in the interior can be easily backwashed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter suitable for use in capturing and removing solid foreign matter from a fluid, particularly for the purpose of removing particulates.

A strainer conventionally installed in a piping system to remove solid foreign matter from a fluid (liquid, gas), as shown in Figure 1, consists of a sealed container (1) and a filter element (1) that traps solid foreign matter. 2). Although this filter element (2) includes a fibrous cartridge that is disposable and replaceable, the filter element targeted by the present invention is of a type that can be repeatedly reused by cleaning.

Conventionally, in addition to C-notched metal, which is a thin plate with many holes drilled in it, wire mesh (Figure 2), and square wire with protrusions on one side (notch wire), as shown in Figure 8, were stacked together to create a frame. However, recently, wires (3) having a figure-7 shape or other cross-sections are fixed to a support frame (4) with a certain gap as shown in Figure 4. Marine fuel oil systems require filter elements with holes or gaps of 5 to 10 microns, and a mesh (roughness) of 5 to 10 microns could not be achieved using conventional methods.

The quality of current marine fuel oil continues to deteriorate, but in order to remove the residue of the fractionation catalyst that is mixed in,
It is necessary to realize a filter terminus of 10μ. In this case, if a disposable fibrous filter element is used, a mesh of 8 to 5 μm is possible, but since the cost of replacing the element due to wear and tear and maintenance increases, a recyclable ultra-fine mesh filter is recommended. It was requested.

The present BA was proposed to eliminate the above-mentioned conventional drawbacks.
In a filter using a filter element, a stack of plates with unevenness on the upper and lower surfaces is used as the filter element, and the unevenness is defined by the average roughness of machining accuracy. In order to ensure a high-X flow path with the uneven surfaces facing each other, by shifting the direction of the grooves on the uneven surface and moving the element guide with an inclined surface, the gap between the filter elements is widened during backwashing. It is an object of the present invention to provide a filter that enhances the cleaning effect.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 5 and 6 show filter elements showing embodiments of the present invention. In the figure, the annular disk (5) (other shapes are acceptable as long as it is a flat disk) has a surface that has been finished into a flat surface by cutting, grinding, electric discharge machining, ultrasonic machining, press working, etc. intentionally to some extent (5~
The roughness is limited to an average roughness of 10μ). Furthermore, the directionality of the machined grooves is slightly shifted between the upper surface (6) and the lower surface (7) of the disk (5).

As shown in FIGS. 7 to 10, the entire filter includes a cylindrical element (5a) in which a large number of disks (5) described in FIG. 5 are stacked in a container α0). The cylindrical filter element (5α) gradually changes the inner and outer diameters of each disk (5) to form a truncated cone shape as a whole, or by overlapping disks with holes with different inner diameters, On the other hand, the element guide is machined to have a certain angle of inclination α, such as by having a conical hole.
9) has an inclination angle β that is smaller (acute angle) than the inclination angle of the above-mentioned element (5a). Further, the element guides (8) and (9) can be moved relative to each other in the directions shown by the arrows in FIGS. 8 and 10. The normally moving guide (9) is at the position (9a) in FIGS. 8 and 10, and the element (5α) and the inclined surfaces of the element guides (8) and (9) are not in contact with each other. Note that the above-mentioned inclined surface may have a step-like shape.

Next, to explain the operation, the fluid containing solid foreign matter flows from the outside (or inside) of the cylindrical filter element (5α), passes through the gap between the laminated flat plates of the element (5a), and passes through the gap between the laminated flat plates of the element (5a). Exit to the inside (or outside) of 5a). At this time, solid foreign matter is captured at the entrance of the gap between the flat plates and removed from the fluid.

The gap between the flat plates can be maintained by the convex parts on the top and bottom surfaces of the flat plates touching each other, or the gap between the flat plates can be maintained by making the grooves have a direction and making the direction smooth on the top and bottom surfaces. The flow path is more securely maintained. Since the solid foreign matter that constantly flows in accumulates on the element 1-(5d), it is necessary to clean the element every certain period of time. In order to perform this work without opening the filter, a method is used in which the fluid is temporarily flowed in the opposite direction to the normal flow (generally called backwashing), so that the solid foreign matter on the element is precipitated at the bottom of the fluid inlet chamber. The precipitated foreign matter is removed from the vessel by opening the drain valve. During backwashing, the element guide (9), which is normally at the (9α) position, moves to the (9b) position. At this time, the 1 & 1 disks that make up the element were originally only stacked and not fixed to each other, so the portions that formed the inclined surfaces of each disk were connected to the enment guide (8) and (9b). )
In other words, the distance between each disk is increased until the inclination angle of the element (5a) matches the inclination angle β of the element guide. This allows you to easily backwash any foreign objects that are stuck deep inside.

When backwashing is completed, return the element kite (9) to its original position (9α), and the stopper 0υ attached to the element guide (9) will release each disc (5) of the element.
are in contact with each other.

Since the present invention is configured as explained in detail above,
The ultra-fine mesh filter element can be repeatedly reused by cleaning operations, and the backwashing effect can be increased by widening the spacing between the filter elements during backwashing.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a strainer installed in a conventional piping system, Figs. 2, 3, and 4 are perspective views showing conventional filter elements, respectively, and Fig. 5 shows an embodiment of the present invention. FIG. 6 is a plan view of a disk constituting a filter element, FIG. 6 is a front view of the same, FIG. 7 is a plan view of a filter element showing an embodiment of the present invention, FIG. 8 is a front sectional view of the filter element, and FIG. 10 is a front sectional view of the same element. Explanation of main parts of the figure 5... Circle ffi 5a... Filter element 6... Top surface 7... Bottom surface 8.9... Element kite patent Applicant Mitsubishi Heavy Industries, Ltd. Figure 5

Claims (1)

[Claims] Use a filter element? In the M filter element, a stack of plates with unevenness on the upper and lower surfaces is used, and the unevenness is defined by the average roughness of machining accuracy, and the concave curved surfaces are In order to secure a possible flow path, the direction of the uneven grooves is shifted,
A filter characterized in that by moving an element guide having an inclined surface, the gap between the filter elements is widened during backwashing, thereby increasing the backwashing effect.