JPH0239536Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a filter applied to a foreign matter removal device for cooling water of a power plant condenser.

[Conventional technology]

FIGS. 6A, B, and C are diagrams showing a screen filter using a mesh according to the prior art, in which the filter element is installed in the casing 01 so that the filter surface is perpendicular to the flow direction,
Frame 03 supporting net 04 is attached to frame fixing plate 0
2 by bolts 06 or welding to form a filter.

Furthermore, FIGS. 7A and 7B are diagrams showing examples of cylindrical filter elements in the prior art, in which a porous plate 05 is formed into a cylindrical shape, and this plate 05 is placed inside a casing 01. The filter is constructed by firmly fixing the open end of plate 05 to frame fixing plate 02 with bolts 06 so that the filter surface at the bottom of the cylindrical filter element is perpendicular to the flow direction. There is.

[Problem that the invention attempts to solve]

As mentioned above, in the method of attaching the frame that supports the net that constitutes the filter element to the casing by bolts or welding, if the diameter of the casing becomes large, reducing the size of one frame increases the number of installation steps. Since it is disadvantageous in terms of cost, a large frame is often used, which is heavy and cannot be easily attached or detached.

In addition, in the case of cylindrical filter elements made of perforated plates, which are generally used for the purpose of increasing the overarea, as the diameter increases, the thickness of the perforated plate becomes thicker in terms of strength, and the weight becomes heavier. Not only is this technically difficult, but it is also disadvantageous in terms of cost.

An object of the present invention is to provide a filter for a foreign matter removal device that can solve the above-mentioned conventional problems.

[Means for solving problems]

The filter of the foreign matter removing device according to the present invention includes a plurality of guides having frame mounting grooves that are long in the axial direction and installed at predetermined intervals in the circumferential direction of the casing on the inner circumferential wall of the casing, and each A cylindrical screen filter surface is formed by being arranged between each frame attached to each frame mounting groove of the guide and each adjacent guide, and held at both ends by each frame via an insulating material. Moreover, the downstream opening is also provided with a panel-shaped net constituting a screen filter surface.

[Effect]

According to the present invention, by attaching the frame supporting the net to the guide in a sliding manner, the number of installation steps per frame can be reduced, the frame size can be reduced, and attachment and detachment can be facilitated. In addition, by arranging the frame as one unit so as to form a polygonal or star-shaped cross section as a whole, it is possible to construct a cylindrical filter element using a mesh. Furthermore, by fixing the fixed legs to the casing with insulating bolts, etc., by sandwiching the inner lining material of the casing, the insulation of the fixed legs is strengthened in terms of corrosion protection in liquids, etc., and attachment and detachment are made easy. I can figure it out.

〔Example〕

Hereinafter, embodiments of the filter of the foreign matter removing device according to the present invention will be described with reference to FIGS. 1A and 1B to FIG. 5. The same reference numerals in the figures indicate the same parts.

In FIGS. 1A and B and FIGS. 2A and B, the fixed leg 2 is attached to the casing 1 by an insulating bolt 7 (FIG. 2A) that sandwiches the inner lining material 8 of the casing 1. Fixed. A mesh 3 forming a filter surface is attached to a frame 4 together with a filler 9, and the frame 4 is slidably attached to a guide 6 together with an elastic body 5 such as rubber. By combining the individual frames 4, the filter element as a whole is formed into a cylindrical shape having a polygonal or star-shaped cross section. Note that FIG. 2B shows an example in which the bolts 7 are fixed by welding.

3 to 5 show other embodiments of the present invention,
As for how to attach the guide and the frame, Fig. 4 shows an example in which a member having a circular cross section is used as the frame, and Fig. 5 shows an example in which the guide is provided with an angle corresponding to the apex angle of a polygon or star shape in advance. Here is an example.

As shown in Fig. 1 A, B and Fig. 2 A, B,
The frame 4 is slidably attached to a guide 6 together with an elastic body 5 having a convex surface. The elastic body 5 has many functions, as shown in FIG. With the guide 6 located at a position corresponding to the apex of the rectangular cross section, the attachment angle between the guide 6 and the frame 4 can be made flexible.

Of course, as shown in FIG.
An angle corresponding to the apex angle of the polygon may be provided, or
Further, as shown in FIG. 4, by using a member having a circular cross section as the frame 4, flexibility can be imparted to the attachment angle between the frame 4 and the guide 6.

In addition, as shown in FIGS. 2A and 2B, by rounding the tip of the guide 6, it is possible to position the frame 4 between the two guides, which not only makes attachment and detachment easier, but also makes it possible to easily attach and detach the frame 4 from the guide 6. It is also possible to prevent it from being pulled out.

FIG. 1B shows an example of a case where a cylindrical filter element is constituted by a net 3. As shown in the figure, the net 3 and the frame 4 supporting it are considered as one unit, and the cross-sectional shape as a whole is various. Although it is configured to be a square, it does not necessarily have to be a regular polygon, and a plurality of one frame unit may be arranged in a span corresponding to one side of the polygon. In addition, as shown in FIG. 2A and B, frame 4
is only slidably fitted into the guide 6, so the moment caused by the force acting on the net 3 is not directly transmitted to the guide 6 and the fixed leg 2; The force acting on the casing 1 is transmitted only as a compressive force, and by supporting it as a whole by the casing 1, the structure becomes stable in terms of strength.

In addition, as shown in FIGS. 2A and 2B, by attaching the fixed leg 2 with insulating bolts 7 so as to sandwich the inner lining material 8 of the casing 1, insulation from corrosion prevention can be achieved. It is easy to attach and detach, and in terms of construction, the fixed legs 2 can be attached even after the casing 1 has been installed on site.
The installation period can be shortened.

Further, as shown in FIGS. 3 to 5, by utilizing the flexibility of the fixed legs 2, the net 3 and the frame 4 are pre-deformed so as to be convex on the side where the pressure is higher. As a result, even if the differential pressure across the net 3 increases and the force acting on the frame 4 increases, as the force increases, the frame 4 will be fitted deeper into the guide 6, causing the frame 4 and the guide to It is possible to prevent leakage from the gap from 6.

[Effect of idea]

According to the present invention, since the mesh is divided into multiple parts, it is easier to attach and remove the mesh that forms the filter surface compared to the conventional type, and it is also possible to manufacture a cylindrical filter element with a large overarea using the mesh. Furthermore, excellent effects such as an economical and high-performance filter for a foreign matter removal device that has excellent insulation properties in terms of corrosion resistance in liquids and the like can be achieved.

[Brief explanation of drawings]

1A, B and 2A, B are diagrams showing the structure of one embodiment of the present invention, FIGS. 3 to 5 are diagrams showing the structure of other embodiments of the present invention, and FIG. A, B, C
7A and 7B are diagrams showing each conventional example. 1... Casing, 3... Net, 4... Frame, 5... Elastic body, 6... Guide.

Claims (1)

[Scope of utility model registration request] a plurality of guides having frame mounting grooves that are long in the axial direction and installed at predetermined intervals in the circumferential direction of the casing on the inner circumferential wall of the casing; The screen filter is disposed between each of the frames and the adjacent guides, and is held at both ends by the frames via an insulating material to form a cylindrical screen filter surface, and also at the opening on the downstream side thereof. 1. A filter for a foreign matter removing device, comprising: a panel-shaped net constituting a screen filter surface.