JPS6215243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device for removing foreign matter mixed into a fluid.

Generally, a filtration device removes foreign substances from a fluid using a filtration member made of a fine wire mesh or the like. Therefore, during use, the filtration member becomes clogged and the filtration ability is reduced, requiring frequent replacement or cleaning of the filtration member. The present invention has been developed to solve these problems. It reduces clogging of the filter member, maintains high filtration performance over a long period of time, and removes accumulated foreign matter by moving the fluid. To obtain a filtration device that can easily remove water in a short time using pressure.

That is, in order to achieve the above object, the present invention
A cylindrical filtration member is provided in the center of the cylindrical main body, and an annular inflow chamber is formed between the filtration member and the inner surface of the main body, and an annular inflow chamber is formed inside the filtration member, and the inflow chamber is formed between the filtration member and the inner surface of the main body. The upper part of the chamber is provided with an inlet which is opened in the tangential direction and introduces the fluid along the circumferential direction of the inflow chamber, and the bottom wall of this inflow chamber is gradually opened in the circumferential direction along the direction of introduction of the fluid. It is formed on a slope that deepens, and at the deepest part of the end of this slope,
It is characterized in that a rising wall connected to the starting end of the slope is erected, and a foreign matter removal passage equipped with an on-off valve is communicated.

The present invention will be described below with reference to embodiments shown in the drawings. 1 to 8 show a first embodiment of the present invention, in which the present invention is applied to a filtering device for cooling water of an engine of a small boat.
In the figure, 1 is a hull, 2 is an engine, and 3 is a jet type propulsion device. Reference numeral 4 denotes a cooling water pipe for the engine 2, which is configured to introduce water from the propulsion device 3 under dynamic pressure and supply it into the engine 2 via the filtration device 5. Reference numeral 6 denotes a main body of this filtering device 5, and this main body 6 has a substantially cylindrical shape, and is fitted into a hollow cylindrical cylindrical member 7 and an upper end opening and a lower end opening of this cylindrical member 7. An upper end member 8 and a lower end member 9 close both openings.
It is made up of. These cylindrical member 7, upper end member 8, and lower end member 9 are tightened and fixed in the axial direction by a screw rod 10 provided through the center thereof and a wing nut 11 screwed thereto. . Note that the cylindrical member 7 is made of a transparent material, such as a glass material, so that the inside can be visually recognized. Further, an O-ring 1 is attached to the fitting portion of the cylindrical member 7, the upper end member 8, and the lower end member 9.
2 and 12 are interposed. Further, a filtering member 13 is provided in the center of the main body 6. The filter member 13 is made of a fine wire mesh or the like and has a cylindrical shape. The filter member 13 is located concentrically with the main body 6, and both ends thereof are fitted into the upper end member 8 and the lower end member 9. The annular space between the filter member 13 and the inner surface of the main body 6 is formed into an inflow chamber 14, and the inside of this filter member 13 is formed into an outflow chamber 15. The upper end member 8 has two inlets 16,
16 are formed, and these inlets 16, 16
is connected to the cooling water pipe 4. These inlets 16, 16 are arranged in directions perpendicular to each other, and are both opened in the tangential direction of the inflow chamber 14, so that the water sent out from the cooling water pipe 4 is directed in the circumferential direction of the inflow chamber 14. It is now being introduced accordingly. In addition, this upper end member 8 has an outflow chamber 1.
5 is formed, and this outlet 17 is connected to the engine 2 side.

The bottom wall of the inflow chamber 14, that is, the bottom wall portion 18 on the inner surface of the lower end member 9, is gradually deepened in the circumferential direction along the inflow direction of water from the inflow ports 16, 16, as shown in FIG. It is formed into a spiral slope 18a that is inclined so as to be. At the deepest part 19 at the end of this slope 18a, there is a vertically rising wall 2.
0 is erected, and the upper end of this rising wall 20 is continuous with the shallowest part 21 at the starting end of the slope 18a.

The lower end member 9 has the deepest part 1 of the slope 18a.
A foreign matter removal port 22 is formed that opens at 9 and extends downward in the axial direction of the main body 5, and a foreign matter removal passage 23 is communicated with this foreign matter removal port 22. The foreign matter removal passage 23 is open to, for example, the bottom of the hull 1.
is provided with a normally closed on-off valve 24.

The first embodiment of the present invention configured as described above is as follows:
The introduced cooling water is passed from the cooling water pipe 4 to the filtration device 5.
The water flows into the inflow chamber 14 , is filtered by the filter member 13 , flows into the outflow chamber 15 , and flows into the engine 2 through the outflow port 17 . Since the inflow ports 16, 16 are open in the tangential direction of the inflow chamber 14, the water flowing into the inflow chamber 14 swirls and flows in the circumferential direction thereof. Due to this swirling flow, foreign substances such as sand with a relatively large specific gravity are moved outward by centrifugal force and do not adhere to the outer surface of the filter member 13, so the filter member 13
clogging is greatly reduced. Then, this foreign object that has moved outward gradually sinks due to gravity,
It settles on the bottom wall portion 18 of the lower end member 9. The bottom wall portion 18 of the lower end member 9 has a slope 18a that is inclined so as to gradually become deeper along the direction of the swirling flow.
The deepest part 19 has a rising wall 20.
is installed vertically, the sinking foreign matter is collected in the deepest part 19 by taking advantage of the swirling flow, and most of it is deposited in the deepest part 19. Furthermore, foreign matter with a relatively small specific gravity is filtered by the above-mentioned filter member 13 and adheres to its outer surface. However, since the water in the inflow chamber 14 flows while swirling, the outer surface of the filter member 13 is also constantly exposed to the swirling flow, and foreign matter adhering to the outer surface is easily removed. Therefore, clogging of the filter member 13 is further reduced. Then, the amount of foreign matter inside the main body 6 is visually measured from the outside through the transparent cylindrical member 7, and if this amount increases, the on-off valve 24 is opened. Then, a part of the water flowing into the inflow chamber 14 and swirling is discharged through the foreign matter removal port 22. Therefore,
Foreign matter accumulated in the deepest part 19 of the lower end member 9 is discharged together with the water, and floating foreign matter having a specific gravity smaller than that of the water is also discharged together with the water. and,
In this case, since a rising wall 20 is formed in the deepest part 19 where foreign matter accumulates, facing the swirling flow, when the on-off valve 24 is opened as described above,
The foreign matter is quickly moved from the foreign matter removal port 22 to the foreign matter removal passage 23 under the pressure of the swirling flow that hits the rising wall 20.
This allows the foreign matter to be expelled in a short time using the dynamic pressure of the water.

In addition, in the case of this embodiment, since water is introduced into the inflow chamber 14 from the propulsion device 3 by dynamic pressure, the swirling flow is of course strengthened, and the filtration member 1 Even if the inflow chamber 14 becomes clogged, the water in the inlet chamber 14 can be gradually discharged because the dynamic pressure of water is applied to the filter member 13.

Note that the present invention is not limited to the first embodiment described above.

For example, as in the second embodiment shown in FIG. 9, the cylindrical portion and the lower end portion of the main body 6 are integrally formed of transparent resin or the like, and the lower member 25 is assembled by screwing onto the upper end member 8. Good too.

Further, as in the third embodiment shown in FIG. 10, a plurality of protrusions 26 are provided on the outer peripheries of the upper end member 8 and the lower end member 9, and screw rods 27 and wing nuts 28 are installed between them. It may be fixed by tightening. Note that the second and third embodiments have the same configuration as the first embodiment except for the above points, and parts corresponding to the first embodiment in FIGS. 9 and 10 are designated by the same reference numerals. The explanation will be omitted. Since these embodiments do not have a screw rod in the outflow chamber 15, they have advantages such as low resistance and no corrosion of the screw rod.

Furthermore, the present invention is not limited to the above-mentioned cooling water filtration device for small ships, but can of course be applied to other hydraulic equipment filtration devices.

According to the present invention described in detail above, the fluid flowing in from the inlet generates a strong swirling flow, and at this time, heavy foreign matter moves outward due to centrifugal force, and relatively lightweight foreign matter adhering to the filtration member It is also easy to remove when exposed to the swirling flow, so clogging of the filter member is significantly reduced, and high filtration ability can be maintained for a long period of time.

Moreover, the bottom wall of the inflow chamber is formed as a slope that gradually becomes deeper along the fluid flow direction, and a rising wall is provided at the deepest part of this slope, and a foreign matter removal passage is provided. Because of the communication, the foreign matter that sinks in the inflow chamber is collected at the deepest part by taking advantage of the swirling flow, and most of it is deposited in the communicating part of the foreign matter removal passage. Since the rising wall faces the swirling flow, when the on-off valve is opened,
The accumulated foreign matter is quickly pushed out into the foreign matter removal passage under the pressure of the swirling flow that hits the rising wall. Therefore, the accumulated foreign matter can be removed in a short time by using the dynamic pressure of the fluid. It has advantages such as being able to be easily and reliably discharged.

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention, FIG. 1 is a side view showing the state of use, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a second embodiment. of-
5 is a sectional view taken along line - in Fig. 2, Fig. 6 is a plan view of the lower end member, Fig. 7 is a sectional view taken along line - in Fig. 6, and Fig. 8 is a sectional view taken along line - in Fig. 2. FIG. 6 is a sectional view taken along the line - in FIG. 6; 9 and 10 are longitudinal sectional views of the second embodiment and the third embodiment, respectively. 6...Main body, 13...Filtering member, 14...Inflow chamber, 15...Outflow chamber, 16...Inflow port, 17...
Outlet, 18...Bottom wall part, 18a...Slope, 19
...Deepest part, 20...Rising wall, 22...Foreign matter removal port, 23...Foreign matter removal passage, 24...Opening/closing valve.

Claims (1)

[Claims] 1. A cylindrical filtration member is provided in the center of the cylindrical main body, and an annular inflow chamber is formed between the filtration member and the inner surface of the main body, while an outflow chamber is formed inside the filtration member. An inlet is formed in the upper part of the inflow chamber and is opened in the tangential direction of the inflow chamber to introduce the fluid along the circumferential direction of the inflow chamber. A slope is formed that gradually deepens in the circumferential direction along the slope, and a rising wall connected to the start of the slope is erected at the deepest part of the end of the slope, and a foreign matter removal passage equipped with an on-off valve is opened. A filtration device featuring: 2. The filtration device according to claim 1, wherein the fluid is introduced into the inlet by its dynamic pressure.