JP5681741B2 - Inline strainer - Google Patents

Description

  The present invention relates to an in-line strainer that is incorporated in a piping line through which liquid such as feed water to agricultural chemicals or plants passes and filters out foreign matters (dust) in the liquid flowing through the piping line.

  As a prior art of the inline strainer mentioned above, for example, those described in Patent Documents 1 and 2 below are known.

  The in-line strainer disclosed in Patent Document 1 is coaxially incorporated in the middle of a piping line, and includes a cyclone cylinder and a strainer element inside a cylindrical housing having an inlet at one end and an outlet at the other end. Is installed.

  The in-line strainer introduces liquid into the housing from the inlet, and reverses the liquid flow while swirling the other end of the housing to introduce the liquid into the inside of the cyclone cylinder. The foreign matter is filtered out by passing through the strainer element.

  Further, the cyclone cylinder is configured such that a portion placed near the inflow port of the housing is reduced in diameter toward the inflow port side of the housing so that the foreign matter filtered by the strainer element is collected in the reduced diameter portion. A tip for reducing the diameter of the cyclone cylinder is provided with a foreign matter outlet, and the foreign matter staying in the cyclone cylinder can be taken out by opening the outlet.

  On the other hand, the in-line strainer disclosed in Patent Document 2 is incorporated in the middle of the piping line in a direction perpendicular to the axis of the piping line, and is introduced into the inside of the cylindrical body from the side water absorption pipe. A swirling flow is generated by ejecting liquid from the nozzle, and the swirling flow is passed through a cylindrical filter disposed between the cylindrical main body and the nozzle, and from a water supply pipe provided on the side opposite to the water absorption pipe. It is meant to be drained.

  The inline strainer of Patent Document 2 is provided with a tapered cone-shaped cyclone chamber at the lower portion of the main body, and foreign matter filtered off by the cylindrical filter accumulates inside the cyclone chamber. At the lower end of the cyclone chamber, there is a foreign matter discharge port that can be opened and closed.

Japanese Patent No. 4881977 Japanese Utility Model Publication No. 61-75807

  Since the in-line strainer disclosed in Patent Document 1 reverses the flow of liquid introduced into the housing at the other end of the housing, it is difficult to reduce the size of the cyclone cylinder, and the overall length tends to increase. there were.

  In addition, the liquid whose flow is reversed inside the housing is reversed again after passing through the strainer element and heads toward the outlet, so that the liquid flow becomes weak near the tip of the reduced diameter portion of the cyclone cylinder and is filtered off. It was also difficult to further improve the function of taking out foreign objects and collecting them near the mouth.

  Since the in-line strainer of Patent Document 2 is incorporated in a direction perpendicular to the axis with respect to the piping line, it is more likely to be subject to installation restrictions coaxially with respect to the piping line than to an installation.

  Also, this in-line strainer has a structure in which the generated swirl flow is difficult to reach the lower end of the cyclone chamber. Weighted foreign matter sinks under its own weight and accumulates in the cyclone chamber, but foreign matter that floats easily in the liquid and is difficult to sink adheres to the inner surface of the filter and is therefore not recovered well in the cyclone chamber, making it easier for the filter to clog. it is conceivable that.

  As disclosed in Patent Document 1, an object of the present invention is to reduce the overall size and improve the recovery efficiency of foreign matter for an inline strainer that is coaxially incorporated into a piping line.

  In order to solve the above problems, in the present invention, an in-line strainer incorporated in the middle of the longitudinal direction of the piping line is configured as follows.

  Specifically, a cylindrical housing provided with an inlet at one end, an outlet at the other end, and a foreign matter outlet on the outer periphery in the longitudinal direction, and installed inside the inlet side of the housing from the inlet A swirl flow generating component that swirls the liquid introduced into the housing, a cylindrical filter element that connects the swirl flow generating component to the opening end on the inlet side, and an open end on the outlet side of the filter element. And a valve cap for closing the foreign matter discharge port.

The dust collecting cylinder is a cylinder in which the outlet side end is closed and an outlet connected to the foreign matter outlet is provided at one place on the outer periphery . Further, the dust collecting cylinder is formed in a tapered cone shape whose diameter is reduced from the inlet side toward the outlet side, and the outlet is provided on the outer periphery of the outlet side end portion of the dust collecting cylinder.

  Then, the liquid that has been swirled by the swirling flow generating component is permeated from the inside to the outside of the filter element to be filtered, and the filtered liquid is removed from the outer periphery of the filter element and the dust collecting cylinder and the housing. The foreign matter remaining inside the filter element was washed away by a swirling flow and passed into the dust collecting cylinder through a passage formed between the inner surface and the inner surface.

This in-line strainer has, as the valve cap, a valve seat that contacts and separates from the valve seat at the outlet end of the foreign matter discharge port inside the cap having a screw fitting structure, and the valve seat is rotated by a tightening direction. The foreign matter discharge port is closed by being pressed against the valve seat, and the valve seat is separated from the valve seat by rotation in the loosening direction, and the inside of the dust collecting cylinder is formed in the bottom wall of the cap. It is preferable to use one configured so as to communicate with the.

  Further, it is preferable that the dust collecting cylinder is provided with a projecting piece extending in the axial direction on the outer periphery, and the projecting piece is inserted into a guide groove provided on the inner surface of the housing to perform positioning and rotation prevention.

  In the in-line strainer of the present invention, the liquid introduced into the housing from the inflow port passes through the swirl flow generating component to become a swirl flow, and the swirl flow is introduced inside the filter element.

  The liquid introduced to the inside of the filter element permeates through the filter element while rotating straight along the inner surface of the filter element because the outlet end of the filter element is closed by the dust collecting cylinder. Flow outside the filter element, at which time foreign matter is filtered out.

  In addition, the foreign matter that has been filtered and adhered to the inner surface of the filter element is effectively washed away by the swirling flow generated inside the filter element, and is effectively taken into the dust collecting cylinder by riding on the swirling flow that moves forward. . Since the dust collection cylinder is in the forward direction of the swirling flow in which the dust collection cylinder goes straight, the effect of taking in foreign matter into the dust collection cylinder is superior to the conventional product.

  Further, the foreign matter on the inner surface of the filter element is effectively washed away, so that the filter is not easily clogged.

  Furthermore, since the liquid introduced inside the filter element is swirled and filtered through the filter element, the length of the dust collecting cylinder can be sufficiently shortened, thereby reducing the overall size of the strainer. Costs can also be reduced.

Sectional drawing which shows one form of the in-line strainer of this invention Sectional view along II-II in Fig. 1 (part of the dust collector is broken) Sectional view along III-III in FIG. 1 is an exploded perspective view of the inline strainer of FIG.

  Embodiments of the in-line strainer according to the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 and 4, an exemplary inline strainer 1 includes a cylindrical housing 2, a swirl flow generating component 3, a cylindrical filter element 4, a dust collection cylinder 5 and a valve cap 6. It is configured in combination.

  The housing 2 has an inflow port 7 at one end, an outflow port 8 at the other end, and a foreign matter discharge port 9 on the outer periphery in the middle of the length. Reference numeral 10 denotes an end cap that is detachably attached to the outlet side of the housing. The end cap 10 is provided with an outlet 8.

  The swirl flow generating component 3 is incorporated in the end portion on the inlet side inside the housing 2. The swirl flow generating component 3 is provided with a plurality of torsion passages 3a twisted in a predetermined direction, and a rotational force is applied to the liquid by passing through the torsion passages 3a to generate a swirl flow inside the filter element 4. Is done. FIG. 4 shows a view of the swirl flow generating component 3 as viewed from the upstream side and a view as viewed from the downstream side (this is an enlarged view).

  A swirling flow can be created even if there is only one torsion passage 3a. The swirl flow generating component 3 is not limited to the illustrated embodiment as long as it can create a swirl flow.

  The filter element 4 is detachably connected to the swirl flow generating component 3 at the opening end on the inlet 7 side. The dust collecting cylinder 5 is detachably connected to the opening end of the filter element 4 on the outlet 8 side.

  The dust collecting cylinder 5 is a tapered cone-shaped cylinder having a diameter gradually reduced from the inlet side 7 toward the outlet side 8. The outlet side end of the dust collection cylinder 5 is closed, and an outlet 11 connected to the foreign matter discharge port 9 is provided at one place on the outer periphery of the dust collection cylinder 5.

  The dust collecting cylinder 5 is positioned at a position where the outlet 11 is connected to the foreign matter discharge port 9 and, in order to hold the cylinder at a positioning point, as shown in FIGS. A protruding piece 12 extending in the axial direction is provided at a position rotated by 180 °, and the protruding piece 12 is inserted into a guide groove 13 provided on the inner surface of the housing 2 to perform positioning and rotation prevention.

  As shown in FIG. 2, the projecting piece 12 has an end portion in the longitudinal direction protruding from the closed end of the dust collecting cylinder 5 to the downstream side (outlet 8 side) of the piping line, and the tip of the protruding portion is A passage 14 is created between the outer periphery of the dust collecting cylinder 5 and the inner surface of the end cap 10 in a state where it abuts against the inner surface of the end cap 10.

  The passage 14 communicates with a passage 15 formed between the outer periphery of the filter element 4 and the dust collecting cylinder 5 and the inner surface of the housing 2.

  The valve cap 6 employs a valve seat 6b provided inside a cap 6a having a screw fitting structure.

  The foreign matter discharge port 9 is constituted by a hole in the branch pipe 16 provided so as to protrude to the outside of the housing, and the outlet end (end surface of the branch pipe 16) of the foreign matter discharge port 9 is used as a valve seat to the valve seat 6b. Is configured to open and close the foreign matter discharge port 9 by contacting and separating.

  When the cap 6a screwed to the outer periphery of the branch pipe 16 is rotated in the tightening direction, the valve seat 6b is pressed against the valve seat, the foreign matter discharge port 9 is closed, and the valve seat 6b is moved to the valve seat by rotating in the loosening direction. The foreign substance discharge port 9 is opened away from.

  A hole 17 opened to the outside is provided in the bottom wall of the cap 6a. When the valve seat 6b is separated from the valve seat, the dust collecting cylinder 5 communicates with the hole 17 and foreign matter accumulated in the dust collecting cylinder 5 is collected. It is discharged outside.

  When the foreign matter is discharged in a state where a liquid is flowing through the piping line, the swirling flow generated in the filter element 4 flows to the foreign matter discharge port 9, and the foreign matter accumulated in the dust collecting cylinder 5 by the swirling flow. Is discharged instantly. Therefore, even if the foreign matter is discharged while flowing the liquid through the piping line, the liquid is not leaked in a large amount.

  The illustrated valve cap 6 can open and close the foreign matter discharge port 9 without completely removing the cap 6a, and is easy to use. However, the valve cap 6 can be attached to and detached from the branch pipe 16 to remove the foreign matter discharge port 9. It may have a structure that opens and closes.

  Further, when the dust collecting cylinder 5 has a tapered cone shape with a diameter reduced from the inlet side 7 toward the outlet 8 side when the dust collecting cylinder 5 is discharged, the collected foreign matter is discharged using the liquid flow. However, the purpose of collecting and discharging the foreign matter can be achieved even if the shape is not a tapered cone.

  In FIG. 1, 18 is a female threaded joint, and 19 is a male threaded joint, which are provided for the purpose of connecting the housing 2 to the piping line L. The connection of the housing 2 to the piping line L can be performed by providing a flange or the like, and the illustrated joint is not essential.

  1 is an O-ring that seals between the swirl flow generating component 3 and the housing 2, 21 is a seal packing that is sandwiched between the end cap 10 and the housing 2, and 22 is a joint with the end cap 10 and an external thread. The seal packing is sandwiched between the pipe line connecting cap nuts to be screwed together. These are not elements that characterize the present invention.

  The in-line strainer of the present invention is small and can efficiently collect and discharge foreign matters mixed in the liquid. As a result, it is possible to effectively utilize rainwater storage water mixed with foreign matter.

DESCRIPTION OF SYMBOLS 1 Inline strainer 2 Housing 3 Swirling flow production | generation part 3a Torsion channel | path 4 Filter element 5 Dust collection cylinder 6 Valve cap 6a Cap 6b Valve seat 7 Inlet 8 Outlet 9 Foreign substance discharge port 10 Housing end cap 11 Dust collection cylinder exit 12 Protrusion 13 Guide groove 14, 15 Passage 16 Branch pipe 17 Hole 18 Female threaded joint 19 Male threaded joint 20 O-rings 21, 22 Seal packing L Piping line

Claims (3)

An in-line strainer incorporated in the middle of the length of the piping line (L),
A cylindrical housing (2) having an inflow port (7) at one end, an outflow port (8) at the other end, and a foreign matter discharge port (9) at the outer periphery in the longitudinal direction, and the inflow port (7) of the housing A swirl flow generating component (3) which is installed inside the side and turns the liquid introduced into the housing from the inlet into a swirl flow, and a cylindrical filter element which connects the swirl flow generating component to the inlet end of the inlet side (4), a dust collecting cylinder (5) extending in the longitudinal direction of the piping line connected to the opening end on the outlet side of the filter element, and a valve cap (6) for closing the foreign matter discharge port (9) With
The dust collecting cylinder (5) is a cylinder provided with an outlet (11) connected to the foreign matter discharge port (9) at one place on the outer periphery,
The liquid converted into the swirl flow by the swirl flow generating component (3) is permeated from the inside to the outside of the filter element (4) and filtered, and the filtered liquid is filtered through the filter element (4) and the dust collection. Foreign matter remaining inside the filter element (4) is caused to flow through the passage (15) formed between the outer periphery of the cylinder (5) and the inner surface of the housing (2) and flow into the outlet (8). An in-line strainer that is washed by swirling flow and flows into the dust collecting cylinder (5), wherein the dust collecting cylinder (5) is directed from the inlet side (7) toward the outlet side (8). An in- line strainer formed in a tapered cone shape having a reduced diameter and provided with the outlet (11) on the outer periphery of the outlet side end of the dust collecting cylinder (5) . The valve cap (6) has a valve seat (6b) that contacts and separates from the valve seat at the outlet end of the foreign matter discharge port (9) inside the cap (6a) having a screw fitting structure. The valve seat (6b) is pressed against the valve seat by rotation of the valve to close the foreign matter discharge port (9), and the valve seat (6b) is separated from the valve seat by rotation in the loosening direction to collect the dust. The in-line strainer according to claim 1 , wherein the cylinder (5) is configured to communicate with an open hole (17) formed in a bottom wall of the cap (6a). A protruding piece (12) extending in the axial direction is provided on the outer periphery of the dust collecting cylinder (5), and the protruding piece is inserted into a guide groove (13) provided on the inner surface of the housing. The in-line strainer according to claim 1 or 2 , wherein positioning and detent are performed.

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