JPH0418643Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a tubular filter applied to removing solid foreign matter from flowing water.

Prior Art As shown in FIGS. 3a and 3b, in a conventional tubular filter, a tube cover 3 is attached to one end of a horizontal arm of a T-shaped tube 1 via a flange 2. A conical strainer tube 4 is concentric with the arm, and its large diameter end is welded to the other end of the horizontal arm of the T-shaped tube 1 with a strainer tube receiver 5 and an annular metal fitting 6 welded to the strainer tube 4. The small diameter end of the pipe is fixed by a welding flange 7, and the welding flange 7 is sandwiched between the flange 2 and the pipe cover 3, and is attached to the T-shaped pipe 1 by fastening bolts. A straining net 8 is fixed to the inside of the straining tube 4, by a semicircular thin plate 9 in the circumferential direction, and by a flat plate 10 in the horizontal direction. The strainer pipe 4 is provided for the purpose of reinforcing and fixing the strainer net 8, and is a member through which running water passes.

The running water to be filtered is passed from the open end of the horizontal arm of the T-tube 1 to the strainer tube 4 as shown by the white arrow.
The liquid flows into the tube, flows downward through the strainer tube 4, and exits from under the vertical leg of the T-tube. Since the filtered solids accumulate inside the strainer screen 8, the tube cover 3 is periodically removed and the integrated strainer tube 4 and strainer screen 8 are taken out, cleaned, and reused.

The above is a conventional example using a conical strainer tube 4, but there is also a conventional example using a cylindrical strainer tube 4' as shown in FIGS. 4a and 4b. In this case, the shape of the strainer tube holder 5', welded flange 7', strainer net 8', and thin plate 9' is only slightly different from the above case.
Others are substantially the same.

Problems to be solved by the invention The conventional tubular filter as described above had the following problems.

In other words, because the flowing water bends at right angles, the third
A swirling flow as shown by the arrow occurs near the end of the strainer tube 4 in Figures a and 4a, and the solids flowing into the strainer net 8 cause wear, damage, and breakage of the strainer net. This shortens the life of the strainer net and causes head loss of running water.

Means for Solving the Problems In order to solve the conventional problems, the present invention provides a lid 11' arranged concentrically with the strainer net on the side of the tube lid 3 inside the strainer net 8, and a lid 11' at one end, and a lid 11' at the other end. A cylinder 11 having a plurality of holes 12 is attached thereto.

Effects According to the present invention, the swirling flow is significantly reduced by the above-mentioned means, and solid matter flows in through the plurality of holes and is deposited inside.

Example Regarding FIGS. 1a to 2b of the drawings below,
An embodiment of the present invention will be described.

The first aspect of the present invention shown in FIGS. 1a and 1b
The embodiment corresponds to the conventional example shown in FIGS. 3a and 3b, and therefore, corresponding members are shown with the same reference numerals, so redundant explanation of these will be omitted. shall be. The difference from the conventional example described above is that a cylinder 11 is attached to the tube lid 3 concentrically with the strainer tube 4. This cylinder 11 has a smaller diameter than the strainer tube 4 and therefore the strainer net 8,
A sufficient gap is left in between, and the length thereof is set to approximately cover the above-mentioned swirling flow generation region.
The other end of the cylinder 11 is closed with a lid 11'.
A plurality of (three in FIG. 1a or 1b) small holes 12 are formed on the tube lid 3 side of this cylinder 11. In this embodiment, the shape of the small hole 12 is semicircular, but the shape is generally not limited to this. By providing a cylinder 11 with a lid equipped with such small holes 12, the swirling flow that occurs conventionally can be prevented, and fixed objects are prevented from flowing into the annular gap between the cylinder 11 and the strainer net 8. flows into the cylinder 11 through the small hole 12 and is deposited therein. Therefore, the chances of solid matter coming into contact with the straining net 8 are significantly reduced, and as a result, the straining net 8 is prevented from being worn out and its lifespan is extended. Moreover, since solid matter is captured, head loss of flowing water can be reduced.

The second embodiment of the invention shown in FIGS. 2a and 2b corresponds to the prior art example shown in FIGS. 4a and 4b. In other words, it is a tubular filter in which the strainer tube 4' and the strainer screen 8' are cylindrical. In this case as well, a cylinder 11 having small holes 12 and whose end is closed with a lid 11' is inserted into the tube lid 3. It is installed concentrically with 4'. Therefore, as in the previous embodiment, a sufficient gap is formed between the cylinder 11 and the strainer screen 8', and the same functions as described above for preventing swirling flow and for solid matter inflow and accumulation are achieved. . As in the previous embodiment, the lid 11' has a slightly larger diameter than the cylinder 11.

Furthermore, the cylinder 11 according to the present invention can be easily added to a conventional tubular filter.

Effects of the present invention According to the present invention described above, the following effects can be obtained.

(b) Since swirling flow is reduced and solid foreign matter is introduced into the cylinder that prevents swirling flow, wear and damage to the strainer net is reduced and its life is extended.

(b) Head loss of flowing water is reduced.

[Brief explanation of the drawing]

FIG. 1a is an axial sectional view of the first embodiment of the present invention;
Figure 1b is a sectional view taken along line Ib-Ib in Figure 1a, and Figure 2a is an axial sectional view of the second embodiment of the present invention.
Figure b is a cross-sectional view taken along line bb in Figure 2a, Figure 3a is an axial cross-sectional view of the conventional example, and Figure 3b is a cross-sectional view taken along line b-b in Figure 2a.
Fig. 4b is an axial sectional view of another conventional example, and Fig. 4b is a sectional view taken along line bb. 1... T-shaped pipe, 2... Flange, 3... Pipe cover, 4... Strain pipe, 5... Strain tube holder, 6... Metal fitting, 7... Welding flange, 8... Strain net, 9... …
Thin plate, 10... flat plate, 11... cylinder, 11'...
Lid, 12...small hole.

Claims (1)

[Scope of utility model registration request] A T-shaped tube, a tube lid that closes one end of the horizontal arm of the T-shaped tube, and a strainer and a strainer disposed inside the T-shaped tube from the other end of the horizontal arm to the one end. In a tubular filter configured with a tube, a cylinder is arranged concentrically with the strainer net on the side of the tube lid inside the strainer net, has a lid at one end, and has a plurality of holes bored at the other end. Tubular filter characterized by installing.